CURRICULUM VITAE SURNAME AND NAME GARRICH … · CURRICULUM VITAE SURNAME AND NAME GARRICH...

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CURRICULUM VITAE

SURNAME AND NAME GARRICH ALABARCE, MIQUEL

Home Address

Phone number

Fax number

E-mail address

Nationality Spanish

Birth date

Working experience (please use the following table in order to briefly describe the working positions

covered by the candidate)

Dates From May 2013 to now (current position)

Name and address of the Employer

CPqD – Centro de Pesquisa e Desenvolvimento

em Telecomunicações

R. Dr. Ricardo Benetton Martins, s/n,

13086-902, Campinas, São Paulo, Brazil.

Position held Senior researcher

Optical Technologies Division

Main activities/responsibilities

Coordination of research and development

(R&D) projects and activities in the optical

networks team covering optical amplifiers,

architectures, high-performance optical networks

and multiple technologies including Software

Defined Networks and Functions Virtualization.

Dates From July 2011 to April 2012

Name and address of the Employer

University of Essex

Wivenhoe Park, Colchester,

CO4 3SQ, United Kingdom.

Position held

Visiting researcher

High Performance Networks group,

School of Computer Science and Electronic

Engineering, University of Essex, UK.

Main activities/responsibilities

Optical node architecture modeling, design and

scalability analysis for high-performance

switching and routing networks.

Participation in laboratorial experiments.

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Education and Training (please use the following table to describe Degrees awarded, by only

indicating the information concerning Bachelor’s Degree, Master of Science’s Degree or/and PhD)

Date February 2013

Institution which issued the degree Politecnico di Torino, Italy.

Type of Degree awarded PhD degree

INTERNATIONAL REFEREES INDICATED BY THE CANDIDATE

Each candidate is required to indicate the names of at least three and not more than five international

experts/referees: they must not have any publications in common with the candidate and must possess a high

scientific qualification and international reputation, that can be objectively verified by the Commission.

Name Institution of origin Address e-mail address (compulsory)

Josep Solé-Pareta Universitat

Politècnica de

Catalunya

Campus Nord

Mòdul D6, Despatx 110

Jordi Girona, 1-3

08034 Barcelona,

Catalunya, Spain.

pareta@ac.upc.edu

Reza Nejabati University of

Bristol

Office 4.19

Merchant Venturers'

Building,

Woodland Road, Clifton

BS8 1UB, U.K.

reza.nejabati@bristol.ac.uk

Idelfonso Tafur

Monroy

Technical

University of

Denmark

Ørsteds Plads

Building 358, room 119

2800 Kgs. Lyngby, Denmark.

idtm@fotonik.dtu.dk

Luis Miguel

Contreras Murillo

Telefónica

Investigación y

Desarrollo

Distrito Telefónica

Edificio Oeste 1

Ronda de la

Comunicación, Sur-3, pl. 3,

28050 Madrid, Spain.

lmcm@tid.es

Piero Castoldi Scuola Superiore

Sant'Anna

Piazza Martiri della

Libertà, 33, Pisa, Italy. castoldi@sssup.it

Date October 2009

Institution which issued the degree Universitat Politècnica de Catalunya, Spain.

Type of Degree awarded Telecommunication Engineering degree

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EVALUATION FIELDS

1. Scientific Activity

Google Scholar profile: https://scholar.google.com.br/citations?hl=en&user=3J2fpQ0AAAAJ

Citation indices All Since 2011

Citations 154 153

h-index 6 6

1.1 The three most important outcomes/results of the research activity of the candidate accompanied

by the tangible and verifiable evidence that the presented results.

1.1.1 Architectures and networks based on microring resonators

Results: 5 conference papers and 1 journal publication

Citations [J2]: 23

Summary: This research activity was addressed during the early stage of my research career while being a

PhD candidate. Specifically, I worked on the use of silicon microring resonators for short reach optical

interconnects considering their unprecedented challenges for the design of architectures and routing

algorithms. I presented new interconnection architectures, I proposed modifications on classical routing

algorithms to achieve a better performance in terms of fabric complexity and scalability with respect to the

state of the art [C1], [C2], [J2]. Subsequently, I considered the wavelength dimension capabilities of

microring resonators in which wavelength reuse (i.e. crosstalk accumulation) may present impairments on

the system performance. In this context, I was involved on the conception of a novel microring-based

wavelength-agile routing matrix [C3] and I led the proposal of different crosstalk reduction techniques [C5].

Finally, I concluded my work in this research line leading the elaboration of an invited paper [C8].

1.1.2 Architecture on Demand

Results: 7 conference papers, 3 journal publications, and 1 Brazilian patent

Citations [J1]: 53

Citations [C6]: 23

Summary: This research activity initiated during a 10-month period (from July 2011 to April 2012) as

visiting researcher at the High Performance Networks group (University of Essex, U.K.). The visiting

researcher period was established within the EC FP7-funded Integrated Project STRONGEST

(http://www.ict-strongest.eu/) where I was the technical leader on the topic of programmable optical systems

providing valuable contributions within Work Package 2 – Network efficiency and optimization. Indeed, I

raised research funds (~€50K) during the execution of the STRONGEST project for the CNIT - Politecnico

di Torino as principal investigator in an activity based on flexible optical node architectures (June 2012).

I worked on the Architecture on Demand (AoD) concept which is an innovative optical architecture whose

main characteristics are flexibility and adaptability since it dynamically synthesizes architectures suited to

the switching and processing requirements of traffic. First, I had the opportunity to be actively involved in

AoD field-trial experiments [C4], [J1]. Then, I led contributions on AoD modeling, scalability and synthesis

proposals [C6], power consumption analysis [C7] and design for high-performance optical switching and

routing [J5]. Subsequently, I proposed a flexible architecture for the add/drop structure of reconfigurable

optical add/drop multiplexers (ROADMs) [C9] [P4], including its experimental demonstration [J6] also

considering different backplanes [C12]. At this point, the background acquired in this research activity,

produced an invited paper where my contribution regarded the architectural modeling (both for AoD and

conventional ROADMs) to analyze its impact in network scenarios [C11]. Recent research outcomes include

proposals for optical power balance in AoD nodes by properly choosing the EDFA deployment in the

synthesis procedure [C17]. This research line is still ongoing within a CPqD - High Performance Networks

group (since September 2012 transferred at University of Bristol) collaboration. Specifically, a network-wide

analysis of the power balance at each AoD node is in current elaboration for a journal submission.

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1.1.3 The Autonomous Network project

Results: 15 conference papers, 5 journal publications, and 5 Brazilian patents

Summary: I am currently leading the Autonomous Network (AN) project and its related research activities

which is the main framework of the optical networks team at CPqD. The AN project is a six-year project

(involving a team of eight junior and full researchers/engineers) with a total budget of €9.21M which

includes a €1.44M of laboratorial equipment devoted to optical transport networks. Within this project,

prototypes are generated and transferred to the Brazilian industry (Padtec S/A, www.padtec.com.br),

collaborations are established with Brazilian and international universities, and publications are generated in

remarkable international conferences and journals. The AN project leverages on an SDN-enabled five-node

metropolitan optical network test-bed with pioneering software modeling of hardware equipment to propose

adaptive and cognitive algorithms, and perform experimental demonstrations. I am currently fully

coordinating the following research works capitalizing on my theoretical modeling/simulation and

experimental implementation skills[J4]:

Advanced control of wavelength selective switch (WSS)-based ROADMs for optical spectrum

equalization. I was initially and partially involved in this research work at the end of 2013 [C10] and

I coordinated the follow-up proposal of different equalization strategies [C13].

Transient response of cascaded WSS-based ROADMs. I am the coordinator of this research work in

charge of experiment definitions, papers elaboration, schedule supervision and planning. Results

include the proposal of overshoot suppression techniques when undesired transient responses occur

in optical networks composed of WSS-based ROADMs [C15], an evolution of such techniques with

a global view enabled by an SDN-controller [C21], and the report of the framework developed to

model and analyze the proposals [C25]. This research work was motivated by CPqD’s technology

partner in optical communications (Padtec S/A) considering field deployment of optical networks

that experienced instabilities. The solution was a technology transfer protected in the Brazilian

National Institute of Industrial Property (BNIIP) [P1] .

Dual control of amplifiers and WSS-based ROADMs. I am currently coordinating a research work

that combines advanced control of Erbium doped fiber amplifiers (EDFAs) and WSS-based

ROADMs proposing the papers, leading their elaboration and supervising the execution of

experiments and obtainment of results [C16], [C24], [P3].

Cognitive gain control of optical amplifiers. I am the technical coordinator of this research work

which includes experimental demonstrations in the AN test-bed. The outcome of this work has been

(10%) top-scored at ECOC’15 [C20] and invited for an extension to JLT [J9]. Moreover, the

proposal has been registered in the BNIIP [P6].

System modeling and optical network control strategies. Research work in collaboration with the

University of Texas at Dallas (UTD) under the coordination of prof. Andrea Fumagalli. I am the

responsible for the CPqD-side cooperation providing to the UTD team valuable insights and

background of physical layer optical devices and their control. Outcomes of this collaboration

include an efficient EDFA modeling framework [C19], its usage in network-wide control strategies

including WSSs in combination with routing and wavelength assignment (RWA) algorithms [C18],

and their experimental demonstration in the AN infrastructure [J8]. Note that [C18] was awarded

among the top-three scored paper in ONDM’15 thanks to this combination of optical devices control

strategies (provided by CPqD) jointly with RWA strategies (provided by UTD).

Secondary research works. Relevant to this visiting research proposal, I am also involved in the

following works within the RA project:

o Field calibration procedure for distributed Raman amplifiers. Operational issue raised by

CPqD’s technology partner in optical communications (Padtec S/A) and solved under my

coordination. Outcomes include a conference paper [C23] and a Brazilian patent [P2].

o Spectrum shaping using programmable optical filters. Secondary research work under my

supervision that generated a conference paper [C22] and a Brazilian patent [P5].

o Network studies using advanced modulation formats (probabilistic shaping) [C26].

Meanwhile, I have been involved in a conference invited paper covering network aspects [C14] and a journal

paper providing the vision of the optical networks team at CPqD within the AN project [J7]. Finally, the

ONDM’16 organizers invited me to present all these research activities and outcomes in an invited paper and

talk precisely entitled “Pioneering Hardware Modeling and Software Design for Optical Infrastructure in the

Autonomous Network Project” [C27].

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1.2 List of the submitted publications (with a maximum number of 20)

1.2.1 Journal publications (6)

[J1] N. Amaya, M. Irfan, G. Zervas, K. Banias, M. Garrich, I. Henning, D. Simeonidou, Yu Rong Zhou,

A. Lord, K. Smith, V.J.F. Rancano, S. Liu, P. Petropoulos, D.J. Richardson. “Gridless optical

networking field trial: Flexible spectrum switching, defragmentation and transport of

10G/40G/100G/555G over 620-km field fiber” Optics Express, Vol. 19, 2011.

Abstract: We present results from the first gridless networking field trial with flexible spectrum switching

nodes and 620 km of installed fibre links. Signals at 10G, 12.25G, 42.7G, DP-QPSK 40G, DP-QPSK 100G

and 555G are generated, successfully transported and switched using flexible, custom spectrum allocation

per channel. Spectrum defragmentation is demonstrated using integrated SOA-MZI wavelength converters.

Results show error-free end-to-end performance (BER<1e-9) for the OOK channels and good pre-FEC BER

performance with margin to FEC limit for the 40G and 100G channels and for the 555G super-channel.

Contribution: First paper in the optical network community reporting a field trial with flexible spectrum

switching, defragmentation and transport of multiple modulation formats and bitrates. Work of high impact

in the research community cited 53 times. I participated in the laboratorial activities and measurement of the

555G super channel (measuring the bit-error-rate BER of each sub-carrier).

[J2] A. Bianco, D. Cuda, M. Garrich, R.Gaudino, G. Gavilanes, P. Giaccone. “Optical Interconnection

Networks based on Microring Resonators” Journal of Optical Communications and Networking

(JOCN), Vol.4, No.7, pp. 546-556, 2012.

Abstract: Optical microring resonators can be integrated on a chip to perform switching operations directly

in the optical domain. Thus they become a building block to create switching elements in on-chip optical

interconnection networks, which promise to overcome some of the limitations of current electronic networks.

However, the peculiar asymmetric power losses of microring resonators impose new constraints on the

design and control of on-chip optical networks. In this work, we study the design of multistage

interconnection networks optimized for a particular metric that we name the degradation index, which

characterizes the asymmetric behavior of microrings. We also propose a routing control algorithm to

maximize the overall throughput, considering the maximum allowed degradation index as a constraint.

Contribution: Journal publication that extends [C2] with moderate impact (cited 23 times) elaborated during

my PhD where I proposed of the interconnection networks and carried out the majority of the work with the

close supervision of Dr. D. Cuda (post-doc). Dr Cuda and prof. Giaccone elaborate the structure and writing

of the paper. I was in charge of the reply to the reviewers.

[J5] M. Garrich, N. Amaya, G. Zervas, J. Oliveira, P. Giaccone, A. Bianco, D. Simeonidou, J. Oliveira.

“Architecture on Demand Design for High-Capacity Optical SDM/TDM/FDM Switching” Journal of

Optical Communications and Networking (JOCN), Vol.7, No.1, pp.21-35, 2015.

Abstract: ROADMs are key elements in operators’ backbone networks. The breakthrough node concept of

architecture on demand (AoD) permits us to design optical nodes with higher flexibility with respect to

ROADMs. In this work, we present a five-step algorithm for designing AoD instances according to some

given traffic requests, which are able to support subwavelength time switching up to

wavelength/superchannel/fiber switching. We evaluate AoD performance in terms of power consumption

and number of backplane optical cross-connections. We compare several ROADM architectures with AoD in

terms of power consumption and cost. We also study different technologies for enhancing the scalability of

AoD. Results show that AoD can bring significant power savings compared to other architectures while

offering a throughput of hundreds of terabits per second.

Contribution: Journal publication that reports results obtained during my Ph.D and extends [C6] and [C7]. I

was fully in charge of this publication elaborating all the simulations, figures, text, structure and review.

[J6] M. Garrich, E. Magalhães, H. Carvalho, N. Gonzalez, G. Zervas, D. Simeonidou, J. Oliveira.

“Experimental Demonstration of Function Programmable Add/Drop Architecture for ROADMs

[Invited]” Journal of Optical Communications and Networking (JOCN), Vol.7, No.2, pp. A335, 2015.

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Abstract: The dramatic growth of Internet traffic is posing unprecedented challenges in all network

segments. Moreover, its increasing heterogeneity is driving research trends in network functions

virtualization and software-defined networking (SDN) to guarantee high levels of reconfigurability,

adaptability, and flexibility. In this context, ROADMs are key elements since they route signals directly in

the optical domain. Thus, it is crucial to design ROADMs with easy maintenance, a low manual intervention

rate, and high reconfigurability, flexibility, and adaptability. In this work, we experimentally demonstrate our

recently proposed add/drop on demand (ADoD) architecture for ROADMs in a SDN metropolitan mesh

optical network test-bed with 80 dual-polarization quadrature phase-shift-keying channels at 128 Gb/s. In

addition, we extend our quantitative measurement of flexibility considering the system’s entropy, showing

that ADoD provides higher flexibility and lower loss than current proposals.

Contribution: Invited journal publication that reports the experimental demonstration of the proposal done

in [C9]. I was fully in charge of this publication setting up the experimental platform, gathering the results,

elaborating structure, text, figures and reviewing process.

[J7] J. Oliveira, J. Oliveira, E. Magalhães, J. Januário, N. Guerrero, L. Carvalho, G. Santos, M. Garrich.

“Toward Terabit Autonomic Optical Networks Based on a Software Defined Adaptive/Cognitive

Approach [Invited]” Journal of Optical Communications and Networking (JOCN), Vol.7, No.3, pp.

A421-A431, 2015.

Abstract: Terabit elastic optical networking (EON) is based on bandwidth-variable transponders capable of

supporting multiple bit rates and/or modulation formats according to traffic requirements and node

architectures that route arbitrary channel bandwidths. Thus, EON increases the heterogeneity of the network,

which may create the need for autonomic adaptive and/or cognitive techniques. In this context, the software-

defined networking (SDN) paradigm emerges as an opportunity to enable such techniques thanks to the

centralized view of the network by decoupling the control plane and the data plane. This paper surveys

different activities carried out at the Optical Technologies Division in CPqD, Brazil. We review an optical

transport SDN controller for virtual optical networks. Then, the autonomic flexible transponder reconfigures

the transmission modulation format according to a threshold level. Moreover, the adaptive global spectrum

equalization reconfigures the wavelengths’ attenuation profiles to improve the signals’ OSNR at reception.

Finally, we report experimental results of an in-band OSNR monitor for advanced modulation formats.

Contribution: Invited journal publication in which I coordinated the elaboration, gathered the contributions

of the work colleagues to decide its structure. I wrote the introduction, future view and conclusions of the

paper. This paper is an invited journal that extends an invited OFC paper in which I am not a co-author

(before I joined CPqD). First author, J. Oliveira is the manager of the optical technologies division.

[J8] X. Wang,� Y, Fei,� M, Razo,� A Fumagalli,� M. Garrich. A. Andrade, M. Svolenski, H.

Carvalho. “Effects of Signal Power Control Strategies and Wavelength Assignment Algorithms on

Circuit OSNR in WDM Networks,” Springer Photonic Network Communications, accepted for

publication, 2016.

Abstract: Software Defined Networking (SDN) is enabling wavelength-division multiplexed (WDM)

networks to be programmable down to individual components. While taking into account typical gain and

noise figure profiles of EDFA components, the authors consider a number of signal power control strategies

and compare their performance in terms of achievable lightpath OSNR. These strategies are applied

network-wide to concurrently control the gain of each individual amplifier and the signal power equalization

at each ROADM. Simulation and (in part) experimental results show that the lightpath OSNR is affected by

three factors: the EDFA gain control strategy, power equalization strategy and wavelength assignment (WA)

algorithm. A trade-off between lightpath average OSNR and OSNR variance across the WDM channels is

also noted. Simulation results are carefully validated against experimental data collected from a five-node

arbitrary meshed WDM network testbed.

Contribution: Journal publication that extends [C18] and reports a major outcome of the collaboration with

the University of Texas at Dallas (UTD) under the coordination of prof. Andrea Fumagalli and CPqD’s

optical networks team under my coordination. I was in charge of defining the experiments, gather the results

and coordinate the CPqD side (A. Andrade, M. Svolenski, H. Carvalho). UTD side fully worked on the paper

structure, elaboration, selection of the results to report and review process.

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1.2.2 Conference publications (14)

[C2] A. Bianco, D. Cuda, M. Garrich, R.Gaudino, G. Gavilanes, P. Giaccone, F. Neri. “Optical

Interconnection Networks based on Microring Resonators,” International Conference on

Communications (ICC), South Africa, May 2010.

Abstract: Interconnection networks must transport an always increasing information density and connect a

rising number of processing units. Electronic technologies have been able to sustain the traffic growth rate,

but are getting close to their physical limits. In this context, optical interconnection networks are becoming

progressively more attractive, especially because new photonic devices can be directly integrated in CMOS

technology. Indeed, interest in microring resonators as switching components is rising, but their usability in

full optical interconnection architectures is still limited by their physical characteristics. Indeed, differently

from classical devices used for switching, switching elements based on microring resonators exhibit

asymmetric power losses depending on the output ports input signals are directed to. In this paper, we study

classical interconnection architectures such as crossbar, Benes and Clos networks exploiting microring

resonators as building blocks. Since classical interconnection networks lack either scalability or complexity,

we propose two new architectures to improve performance of microring based interconnection networks

while keeping a reasonable complexity.

Contribution: Preliminary results obtained at the early stage of my PhD I worked on the interconnection

networks proposal under supervision.

[C5] A. Bianco, D. Cuda, M. Garrich, G. Gavilanes, V. Martina, F. Neri. “Crosstalk Minimization in

Microring-based Wavelength Routing Matrices,” GLOBECOM, Houston, Texas, USA, Dec. 2011.

Abstract: Optical switching fabrics (OSF) are gaining interest because they promise to satisfy the higher

information densities demanded by each successive generation of high-end routers and switches. Silicon

microring resonators (MRR) can be employed to perform switching operations directly in the optical

domain. However, similarly to other devices used to build all-optical switching fabrics, such as Arrayed

Waveguide Gratings (AWG), MRR-based switching fabrics might show a limited scalability in terms of port

count due to the crosstalk accumulation caused by the spatial wavelengths reuse. We consider an OSF built

on a Wavelength-Routing-Matrix (WRM) based on MRRs, we highlight its scalability issues and we propose

a new design as well as two different strategies to limit the wavelength spatial reuse.

Contribution: Conference paper elaborated at the middle stage of my PhD I elaborated this work including

writing, structure and results obtainment and presentation. V. Martina actively contributed with several

mathematical proofs reported in the paper.

[C6] M. Garrich, N. Amaya, G. Zervas, P. Giaccone, D. Simeonidou. “Architecture on Demand: Synthesis

and Scalability,” Optical Network Design and Modeling (ONDM), Colchester, U.K., April 2012.

Abstract: The optical cross-connect (OXC) is a key element in current WDM networks. In this context, the

design of OXCs is becoming very challenging since it has to fulfil requirements from legacy optical

networks and be future-proof to support both legacy lower bitrates and future high-speed super-channels by

means of flexible allocation of spectral resources. In this paper we review the novel concept of Architecture

on Demand (AoD) to dynamically synthesise architectures suited to the switching and processing

requirements of traffic. We propose a technique suited to perform architecture computation and composition

and discuss the scalability of the proposed technique. Results show that it is possible to reduce the number of

hardware modules used at least by half compared to other conventional architectures.

Contribution: First and one of the major outcomes obtained during the 10-month period (from July 2011 to

April 2012) as visiting researcher at the High Performance Networks group (University of Essex, U.K.). I

was fully in charge of this publication (structure, writing, simulations, review process) under minor

supervision. This publication created a relevant impact in the field of programmable optical node

architectures being cited 23 times. The model of Architecture on Demand (AoD) reported in this paper is

clear, understandable and simple so that arose (and currently arises) related works that are based on it. Clear

examples are publications (among those that cite this paper) that use the AoD node model that I elaborated to

analyze many network-wide impacts against conventional reconfigurable optical add/drop multiplexers

(ROADMs).

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[C7] M. Garrich, N. Amaya, G. Zervas, P. Giaccone, D. Simeonidou. “Power consumption analysis of

Architecture on Demand,” European Conference on Optical Communication (ECOC), Amsterdam,

Netherlands, Sep. 2012.

Abstract: Recently proposed Architecture on Demand (AoD) node shows considerable flexibility benefits

against traditional ROADMs. We study the power consumption of AoD including sub-wavelength time

switching functionality. Results show that AoD can bring energy savings at node level.

Contribution: Based on the model presented in [C6], I led the proposal and elaboration of the AoD power

consumption analysis generating this publication that has been cited 10 times.

[C8] A. Bianco, M. Garrich, R. Gaudino, J. Xia. “Microring resonators: Opportunities and challenges for

future optical networks,” (invited at) International Conference on Transparent Optical Networks

(ICTON), Cartagena, Spain, June 2013.

Abstract: Photonic integrated technologies are a widely accepted platform to overcome electronic limitations

for short reach interconnections. Indeed, recent experiments have demonstrated their viability for both chip-

level and board-to-board interconnects. In this context, microring resonators have the potential to become

key components thanks to their versatility, high switching speed, low power consumption and suitability for

low-cost photonic integration. In this paper we briefly survey recent switching architectures based on

microrings. Then, we highlight microrings positive and negative features for current network architectures.

Finally, we point out the main issues that need to be addressed to strengthen microring resonators role in

future optical networks.

Contribution: Based on the background acquired in [C1], [C2], [J2], [C3] and [C5], I elaborated an invited

paper precisely right after my PhD conclusion (February 2013) and while transitioning to CPqD (May 2013).

[C9] M. Garrich, J. Oliveira, M. Siqueira, N. Amaya, G. Zervas, D. Simeonidou, J. Oliveira. “Flexibility

of Programmable Add/Drop Architecture for ROADMs,” Optical Fiber Communication Conference

(OFC), San Francisco, USA, March 2014.

Abstract: We introduce add/drop on demand (ADoD) architecture for ROADMs to provide higher flexibility

and lower loss than current proposals. We quantitatively measure flexibility considering system's entropy

and associate it with traffic uncertainty, upgradability, and resilience.

Contribution: Conference paper where I proposed a novel architecture for adding/dropping channels in

ROADMs inspired in the AoD concept. I completely elaborated this paper without any supervision.

[C11] A. Ahmad, A. Bianco, E. Bonetto, M. Garrich, J. Oliveira. “Switching node architectures in flexible-

grid networks: A performance comparison,” (invited at) Optical Network Design and Modeling

(ONDM), Stockholm, Sweden, May 2014.

Abstract: A migration from fixed-grid WDM networks to flexible-grid networks is foreseen as a solution

able to cope with the constant traffic increase in backbone networks. The migration will involve significant

changes in the network infrastructure and in the architecture of optical switching nodes. Indeed, several

studies propose new architectures that can effectively exploit the characteristics of flexible-grid networks.

On the one hand, traditional ROADM nodes enhanced with new colorless, directionless and contentionless

capabilities are studied. On the other hand, nodes designed according to the Architecture on Demand concept

were proposed as a solution able to dynamically adapt to the elastic switching and processing requirements

of flexible-grid networks. We evaluate the two node architectures considering their use in flexible-grid

networks and we compare their spectral efficiency and energy consumption.

Contribution: Invited paper where simulations were in charge of A. Ahmad, and paper structure and

elaboration under E. Bonetto and prof. A. Bianco. I contributed with the AoD and ROADM models that

served as input for the simulations. Note that this is paper reports the outcome of a joint effort between

Politecnico di Torino (A. Ahmad, A. Bianco, E. Bonetto) and CPqD (M. Garrich, J. Oliveira) where CPqD’s

practical view of realistic node architectures in deployed optical networks contributed to a solid research line

at PoliTo.

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[C12] M. Garrich, E. Magalhaes, H. Carvalho, A. Bianco, P. Giaccone, G. Zervas, D. Simeonidou, N.

González, J. Oliveira. “Experimental demonstration of backplane architectures for programmable

optical nodes,” European Conference on Optical Communication (ECOC), Cannes, France, Sep. 2014.

Abstract: Programmable optical nodes supporting heterogeneous traffic require optical backplanes with a

high port count. We present two backplane architectures to enhance modularity, compare their scalability in

terms of available cross-connections and we experimentally validate both proposals in a SDN scenario

Contribution: Conference publication where I led the backplane architecture proposals (for AoD nodes),

decided the experiments executed at CPqD, gathered the results and wrote the paper. E. Magalhaes and H.

Carvalho provided a valuable support in the laboratorial facilities of CPqD; A. Bianco, P. Giaccone, G.

Zervas, and D. Simeonidou were involved because the idea was conceived in the 10-month visiting

researcher stage during my Ph.D; and N. González and J. Oliveira are managers at CPqD.

[C13] E. Magalhães, M. Garrich, H. Carvalho, M. Magalhães, N. González, J. Oliveira, A. Bordonalli, J.

Oliveira. “Global WSS-based equalization strategies for SDN metropolitan mesh optical networks,”

European Conference on Optical Communication (ECOC), Cannes, France, Sep. 2014.

Abstract: We experimentally demonstrate the benefits of global (end-to-end) WSS-based spectrum

equalization for multiple ROADMs in cascade. We introduce three equalization strategies to enable OSNR

enhancement in a SDN metropolitan mesh optical network test-bed with 80 x 128 Gb/s

Contribution: Conference publication where I led the strategies proposal and wrote the paper. I assisted E.

Magalhães to evolve the work presented in [C10].

[C14] J. Reis, M. Garrich, D. Pataca, J. Diniz, V. Rozental, L. Carvalho, E. Magalhães, U. Moura, N.

Gonzalez, J. Oliveira, J. Oliveira. “Flexible optical transmission systems for future networking,”

(invited at) Networks, Funchal, Portugal, Sep. 2014.

Abstract: This paper describes the path for future implementations of flexible optical transmission. The

baseline discussion is divided into the transponder technical aspects and the network subsystem elements.

Regarding flexible transponder, three degrees of freedom such as modulation format, symbol rate and

number of channels are exploited in order to obtain rate adaptive transmitters and receivers. In addition,

digital signal processing is discussed to relax the hardware resources and to enhance transmission

performance. As far as the optical networking is concerned, some functionalities present in node subsystems

as optical amplifiers and filters in reconfigurable optical add/drop multiplexers (ROADM) / wavelength

selective switches (WSS) are optimized and implemented to support the requirements needed in software

defined networks (SDN).

Contribution: Invited conference publication where I elaborated the half of the paper regarding networking

aspects. In summary, I surveyed the ongoing activities in the optical networks team at CPqD.

[C15] J. Januário, M. Garrich, B. Sarti, N. González, J. Oliveira. “Experimental Demonstration of

Overshoot Suppression for Cascaded WSS-based ROADMs,” Optical Fiber Communication

Conference (OFC), Los Angeles, USA, March 2015.

Abstract: Cascaded WSS-based ROADMs using conventional controllers may amplify optical power

fluctuations leading to undesired overshoots. We propose and experimentally demonstrate an optical channel

power controller and a technique to suppress overshoots.

Contribution: First conference paper proposing a technique to suppress undesired transient response

(overshoots) in deployed optical networks that are composed of WSS-based ROADMs. I was the coordinator

of this work, decided the paper structure and wrote it. J. Januário performed numerous simulations under my

supervision. B. Sarti performed the experimental work/laboratorial activity, and N. González and J. Oliveira

are managers at CPqD.

Page 10 of 14

[C18] X. Wang, Y. Fei, M. Razo, A. Fumagalli, M. Garrich. “Network-wide Signal Power Control

Strategies in WDM Networks,” Optical Network Design and Modeling (ONDM), Pisa, Italy, May

2015. Among top-three scored papers

Abstract: Software Defined Networking (SDN) is enabling wavelength-division multiplexed (WDM)

networks to be programmable down to individual components. While taking into account typical gain and

noise figure profiles of erbium-doped fiber amplifier (EDFA) components, the authors consider a number of

signal power control strategies and compare their performance in terms of achievable lightpath optical

signal-to-noise ratio (OSNR). These strategies are applied network-wide to concurrently control the gain of

each individual amplifier and the signal power equalization at each reconfigurable optical add/drop

multiplexer (ROADM). Simulation results show that the lightpath OSNR is affected by three factors: the

EDFA gain control strategy, power equalization strategy and wavelength assignment algorithm. A trade-off

between lightpath average OSNR and OSNR variance across the WDM channels is also noted.

Contribution: Top-three scored paper at ONDM conference reporting a result of the interaction with CPqD

team (only myself in this publication) and UTD team (X. Wang, Y. Fei, M. Razo under prof. Andrea

Fumagalli coordination). First outcome of the collaboration reporting results that combine an EDFA control

strategy (based on CPqD’s background) a WSS control strategy (also based on CPqD’s background) and

routing and wavelength assignment (RWA) strategies (based on UTD’s backgroung). X. Wang worked

autonomously running simulations, gathering results and writing the paper under prof. Fumagalli

supervision.

[C20] U. Moura, M. Garrich, H. Carvalho, A. Cesar, M. Svolenski, E. Conforti, A. Andrade, J. Oliveira.

“SDN-enabled EDFA Gain Adjustment Cognitive Methodology for Dynamic Optical Networks,”

European Conference on Optical Communication (ECOC), Valencia, Spain, Sep. 2015. 10% top-

scored paper

Abstract: We propose and experimentally validate an SDN-enabled cognitive methodology for EDFA gain

adjustment that relies on case-based reasoning. Results show OSNR improvements over time demonstrating

the cognition process regardless the deployed amplifier type.

Contribution: Relevant paper in the research community where a cognitive technique is used to control the

hardware devices (EDFAs) in an SDN-enabled metropolitan optical network. I coordinated this work,

actively participated in the structure, writing and selection of the results. U. Moura is a researcher engineer at

CPqD working towards her PhD degree in collaboration with State University of Campinas (I am her co-

supervisor). An extenstion of this work has been invited to Journal of Lightwave Technology (JLT) [J9].

[C27] M. Garrich, A. Bravalheri, M. Magalhães, H. Carvalho, M. Svolensky, A. Andrade, U. Moura, J.

Januário, M. Nascimento, L. Mariote, J. Reis, J. Oliveira. “Pioneering Hardware Modeling and

Software Design for Optical Infrastructure in the Autonomous Network Project,” (invited at) Optical

Network Design and Modeling (ONDM), Cartagena, Spain, May 2016.

Abstract and contribution: I am fully in charge of this invited paper currently in elaboration with punctual

contributions of the team members (co-authors). Specifically, I will first present a comprehensive description

of the AN infrastructure comprising the pioneering modeling of hardware equipment and software design in

the SDN controller. Then, I will review recent research activities which include SDN-enabled adaptive and

cognitive algorithms to improve end-to-end performance, and experimental demonstrations in the optical

layer. Finally, I will highlight future opportunities that deeper SDN equipment programmability combined

with white-box approaches may provide to optical networks.

Page 11 of 14

2. Coordination of research and technology transfer groups and projects.

Coordination and management of research groups, possibly with international relationships and

collaborations; explicit mention of the number and of the type of PhD and Post-Doc students, of

whom the candidate has been the academic supervisor;

As pointed out in Sec. 1.1.3, I am the technical leader of the Autonomous Network (AN) project at CPqD

generating relevant outcomes in the research community. Within the project, an international US-Brazil

collaboration with UTD has been established with no bilateral funding to this aim. The team is composed of

team of eight junior and full researchers/engineers and I am the co-supervisor of the ongoing Master degree

of H. Carvalho [C16], [C24], and the ongoing PhD degree of U. Moura [C20].

Scientific responsibility of National and International research projects, ruled through

partnership agreements with companies and/or public private bodies, which are leaders in their

own sector.

The AN is a National research project fully granted by Funttel (governmental Fund for Telecommunications

Technological Development) and a partnership agreement with Padtec S/A.

Outcomes obtained in the field of technology transfer, in terms of participation in start-ups and

spin-offs, development, use and commercialization of patents/licenses.

Research activities in the AN project usually address industrial (Padtec) requirements to solve challenges of

deployed in-field scenarios. In this context, technological transfer is realized between CPqD and Padtec for

prototypes of systems and methods. Examples of these transfers include (within the AN project):

The overshoot suppression of undesired transient response in WSS-based ROADM optical networks

[C15], [C21], [C25], [P1]. The techniques developed in this research activity were included in the

ROADM platform portfolio of Padtec.

The field calibration procedure for enhanced automatic gain control (AGC) of distributed Raman

amplifiers [C23], [P2]. This improved AGC for Raman amplifiers has been include as feature of the

amplifier products portfolio of Padtec.

The embedded system for optical spectral optimization based on a genetic algorithm [C22], [P5].

This system was used for a deployed ultra-long-haul optical link with legacy components for a

wavelength division multiplexed (WDM) aggregate of 10 Gb/s signals (e.g. dispersion compensation

fibers). In this scenario, Padtec required the use of the ultra-long-haul optical link for a WDM

aggregate of 100 Gb/s signals. Therefore, a spectral optimization based on a genetic algorithm was

used to apply an optical pre-emphasis in the transmission of the 100 Gb/s signals. Such system

allowed the use of an advanced modulation format (dual-polarization quadrature phase-shift keying,

DP-QPSK) in a legacy ultra-long-haul link projected for on-off keying (OOK) 10 Gb/s signals.

3. National and international reputation and professional activity for the scientific community

Participation in the Editorial Board of Journals with international reputation (in the role of

Associate Editor or equivalent), participation in the Editorial Board of book series,

encyclopedias and essays of recognized prestige.

Technical Committee member: Computer Communications (Elsevier).

Reviewer: Applied Soft Computing (Elsevier), Computer Networks (Elsevier), Optical Switching and

Networking (Elsevier), Journal of Lightwave Technology (JLT), Journal of Optical Communications and

Networking (JOCN), Optics Express, Journal of Microwaves Optoelectronics and Electromagnetic

Applications (JMOe)

Official research and/or teaching and/or fellowship roles, positions as Scholar/ Visiting

Professor in international highly qualified universities and research centres.

Visiting researcher at University of Essex while conducting the PhD (see Sec. 1.1.2).

Page 12 of 14

Participation in international conferences, as a distinguished invited speaker; participation in

the scientific committees of International Conferences.

Technical Program Committee member: (IEEE) IFIP Networking 2015 and 2016 conferences.

Reviewer: Globecom 2011, International Conference on Communications (ICC) 2012 and 2014,

International Telecommunications Symposium (ITS) 2014, Simpósio Brasileiro de Telecomunicações

(SBrT) 2015.

Invited talks:

o IV International Workshop on Trends in Optical Technologies, Campinas, Brazil, May 2015.

o Workshop on New Paradigms for Routing in Optical Networks, São Paulo, Brazil, July 2015.

4. Teaching activity

Does not apply.

5. Institutional offices and roles in Italian and foreign Universities and/or public and private

institutions with scientific and/or technology transfer aims

Does not apply.

Place and date Campinas, January 14th 2016

1.3 Complete list of all the significant publications of the candidate, including those listed at points

1.1 and 1.2 (to be attached to the end of the Curriculum).

1.3.1 Journal publications

[J1] N. Amaya, M. Irfan, G. Zervas, K. Banias, M. Garrich, I. Henning, D. Simeonidou, Yu Rong Zhou, A. Lord, K.

Smith, V.J.F. Rancano, S. Liu, P. Petropoulos, D.J. Richardson. “Gridless optical networking field trial: Flexible

spectrum switching, defragmentation and transport of 10G/40G/100G/555G over 620-km field fiber” Optics

Express v. 19, 2011.

[J2] A. Bianco, D. Cuda, M. Garrich, R.Gaudino, G. Gavilanes, P. Giaccone. “Optical Interconnection Networks

based on Microring Resonators” Journal of Optical Communications and Networking (JOCN), Vol.4, No.7,

pp. 546-556, 2012.

[J3] D. Pataca, J. Oliveira, M. Garrich, N. Gonzalez, A. Paradisi, J. Oliveira. “Innovations in optical networks

Telecommunications research and development in Brazil,” (invited at) ITU News, nº 10, 2013.

[J4] E. Magalhães, M. Garrich, U. Moura, L. Nascimento, J. Oliveira, A. Bordonalli. “Experimental-based

subsystem models for simulation of heterogeneous optical networks,” Journal of Microwaves, Optoelectronics

and Electromagnetic Applications (JMOe), v. 13, I. 2, pp. 197-213, 2014.

[J5] M. Garrich, N. Amaya, G. Zervas, J. Oliveira, P. Giaccone, A. Bianco, D. Simeonidou, J. Oliveira.

“Architecture on Demand Design for High-Capacity Optical SDM/TDM/FDM Switching” Journal of Optical

Communications and Networking (JOCN), Vol.7, No.1, pp.21-35, 2015.

[J6] M. Garrich, E. Magalhães, H. Carvalho, N. Gonzalez, G. Zervas, D. Simeonidou, J. Oliveira. “Experimental

Demonstration of Function Programmable Add/Drop Architecture for ROADMs [Invited]” Journal of Optical

Communications and Networking (JOCN), Vol.7, No.2, pp. A335-A343, 2015.

[J7] J. Oliveira, J. Oliveira, E. Magalhães, J. Januário, N. Guerrero, L. Carvalho, G. Santos, M. Garrich. “Toward

Terabit Autonomic Optical Networks Based on a Software Defined Adaptive/Cognitive Approach [Invited]”

Journal of Optical Communications and Networking (JOCN), Vol.7, No.3, pp. A421-A431, 2015.

[J8] X. Wang,� Y, Fei,� M, Razo,� A Fumagalli,� M. Garrich. A. Andrade, M. Svolenski, H. Carvalho. “Effects

of Signal Power Control Strategies and Wavelength Assignment Algorithms on Circuit OSNR in WDM

Networks,” Springer Photonic Network Communications, accepted for publication, 2016. [J9] U. Moura, M. Garrich, H. Carvalho, M. Svolenski, A. Andrade, A. C. Cesar, J. Oliveira, E. Conforti.

“Cognitive Methodology for Optical Amplifier Gain Adjustment in Dynamic Optical Networks,” Journal of

Lightwave Technology (JLT), accepted for publication, 2016.

Page 13 of 14

1.3.2 Conference publications

[C1] A. Bianco, D. Cuda, M. Garrich, R. Gaudino, G. Gavilanes, P. Giaccone, F. Neri. “Optical Interconnection

Architectures Based on Microring Resonators,” International Conference on Photonics in Switching, Pisa, Italy,

Sep. 2009.

[C2] A. Bianco, D. Cuda, M. Garrich, R.Gaudino, G. Gavilanes, P. Giaccone, F. Neri. “Optical Interconnection

Networks based on Microring Resonators,” International Conference on Communications (ICC), South Africa,

May 2010.

[C3] A. Bianco, D. Cuda, M. Garrich, G. Gavilanes, F. Neri. “Microring-based wavelength routing matrix,”

European Conference on Optical Communication (ECOC), Geneva, Switzerland, Sep. 2011.

[C4] N. Amaya, M. Irfan, G. Zervas, K. Banias, M. Garrich, I. Henning, D. Simeonidou, Yu Rong Zhou, A. Lord, K.

Smith, V.J.F. Rancano, S. Liu, P. Petropoulos, D.J. Richardson. “Gridless optical networking field trial: Flexible

spectrum switching, defragmentation and transport of 10G/40G/100G/555G over 620-km field fiber,” European

Conference on Optical Communication (ECOC), Geneva, Switzerland, Sep. 2011.

[C5] A. Bianco, D. Cuda, M. Garrich, G. Gavilanes, V. Martina, F. Neri. “Crosstalk Minimization in Microring-

based Wavelength Routing Matrices,” GLOBECOM, Houston, Texas, USA, Dec. 2011.

[C6] M. Garrich, N. Amaya, G. Zervas, P. Giaccone, D. Simeonidou. “Architecture on Demand: Synthesis and

Scalability,” Optical Network Design and Modeling (ONDM), Colchester, Essex, U.K., April 2012.

[C7] M. Garrich, N. Amaya, G. Zervas, P. Giaccone, D. Simeonidou. “Power consumption analysis of Architecture

on Demand,” European Conference on Optical Communication (ECOC), Amsterdam, Netherlands, Sep. 2012.

[C8] A. Bianco, M. Garrich, R. Gaudino, J. Xia. “Microring resonators: Opportunities and challenges for future

optical networks,” (invited at) International Conference on Transparent Optical Networks (ICTON), Cartagena,

Spain, June 2013.

[C9] M. Garrich, J. Oliveira, M. Siqueira, N. Amaya, G. Zervas, D. Simeonidou, J. Oliveira. “Flexibility of

Programmable Add/Drop Architecture for ROADMs,” Optical Fiber Communication Conference (OFC), San

Francisco, USA, March 2014.

[C10] E. Magalhães, J. Oliveira, H. Carvalho, M. Magalhães, M. Garrich, M. Siqueira, A. Bordonalli, J.C. Oliveira.

“Global ROADM-Based Spectrum Equalizer in SDN Architecture for QoT Optimization at DWDM Networks,”

Optical Fiber Communication Conference (OFC), San Francisco, USA, March 2014.

[C11] A. Ahmad, A. Bianco, E. Bonetto, M. Garrich, J. Oliveira. “Switching node architectures in flexible-grid

networks: A performance comparison,” (invited at) Optical Network Design and Modeling (ONDM), Stockholm,

Sweden, May 2014.

[C12] M. Garrich, E. Magalhaes, H. Carvalho, A. Bianco, P. Giaccone, G. Zervas, D. Simeonidou, N. González, J.

Oliveira. “Experimental demonstration of backplane architectures for programmable optical nodes,” European

Conference on Optical Communication (ECOC), Cannes, France, Sep. 2014.

[C13] E. Magalhães, M. Garrich, H. Carvalho, M. Magalhães, N. González, J. Oliveira, A. Bordonalli, J. Oliveira.

“Global WSS-based equalization strategies for SDN metropolitan mesh optical networks,” European Conference

on Optical Communication (ECOC), Cannes, France, Sep. 2014.

[C14] J. Reis, M. Garrich, D. Pataca, J. Diniz, V. Rozental, L. Carvalho, E. Magalhães, U. Moura, N. Gonzalez, J.

Oliveira, J. Oliveira. “Flexible optical transmission systems for future networking,” (invited at) Networks,

Funchal, Portugal, Sep. 2014.

[C15] J. Januario, M. Garrich, B. Sarti, N. González, J. Oliveira. “Experimental Demonstration of Overshoot

Suppression for Cascaded WSS-based ROADMs,” Optical Fiber Communication Conference (OFC), Los

Angeles, USA, March 2015.

[C16] H. Carvalho, E. Magalhães, M. Garrich, N. Gonzalez, M. Nascimento, F. Margarido, L. Mariote, A. Bordonalli,

J. Oliveira. “SDN Dual-optimization Application for EDFAs and WSS-based ROADMs,” Optical Fiber

Communication Conference (OFC), Los Angeles, USA, March 2015.

[C17] H. Yuan, M. Garrich, E. Salas, G. Zervas, D. Simeonidou. “Function Placement and Configuration for Power

Balanced Network Function Programmable Optical Nodes,” Optical Fiber Communication Conference (OFC),

Los Angeles, USA, March 2015.

[C18] X. Wang, Y. Fei, M. Razo, A. Fumagalli, M. Garrich. “Network-wide Signal Power Control Strategies in

WDM Networks,” Optical Network Design and Modeling (ONDM), Pisa, Italy, May 2015. Among top-three

scored papers [C19] Y. Fei, A. Fumagalli, M. Garrich, B. Sarti, U. Moura, N. González, J. Oliveira. “Estimating EDFA Output

Power with an Efficient Numerical Modeling Framework,” International Conference on Communications (ICC),

London, U.K., June 2015.

[C20] U. Moura, M. Garrich, H. Carvalho, A. Cesar, M. Svolenski, E. Conforti, A. Andrade, J. Oliveira. “SDN-

enabled EDFA Gain Adjustment Cognitive Methodology for Dynamic Optical Networks,” European Conference

on Optical Communication (ECOC), Valencia, Spain, Sep. 2015. 10% top-scored paper

[C21] J. Januário, M. Garrich, H. Carvalho, J. Oliveira. “SDN-enabled Centralized Strategies for Cascaded WSS-

based ROADMs,” European Conference on Optical Communication (ECOC), Valencia, Spain, Sep. 2015.

Page 14 of 14

[C22] C. Diniz, M. Garrich, G. Suzigan, J. Reis, D. Mello, J. Oliveira, J. Assine. “Embedded System for Optical

Spectral Optimization Based on a Genetic Algorithm,” International Microwave and Optoelectronics

Conference (IMOC), Porto de Galinhas, Pernambuco, Brazil, Nov. 2015. [C23] B. Sarti, M. Garrich, B. Roulle, I. Cassimiro, U. Moura, J. Oliveira, M. Costa. “Field Calibration Procedure for

Enhanced Automatic Gain Control of Distributed Raman Amplifiers,” International Microwave and

Optoelectronics Conference (IMOC), Porto de Galinhas, Pernambuco, Brazil, Nov. 2015. [C24] H. Carvalho, M. Svolenski, M. Garrich, M. Nascimento, F. Margarido, F. Cabelo, L. Mariote, J. Oliveira, A.

Bordonalli. “WSS/EDFA-based optimization strategies for Software Defined Optical Networks,” International

Microwave and Optoelectronics Conference (IMOC), Porto de Galinhas, Pernambuco, Brazil, Nov. 2015. [C25] J. Januário, M. Garrich, A. Bravalheri, J. Oliveira. “Modeling and Analysis of Transient Response for Cascaded

WSS-based ROADMs,” International Microwave and Optoelectronics Conference (IMOC), Porto de Galinhas,

Pernambuco, Brazil, Nov. 2015. [C26] C. Diniz, J. Hélio Júnior, A. Souza, T. Lima, R. Lopes, S. Rossi, M. Garrich, J. Reis, D. Arantes, J. Oliveira, D.

Mello. “Network Cost Savings Enabled by Probabilistic Shaping in DP-16QAM 200-Gb/s Systems,” Optical

Fiber Communication Conference (OFC), Anaheim, USA, (accepted for publication), March 2016. [C27] M. Garrich, A. Bravalheri, M. Magalhães, H. Carvalho, M. Svolensky, A. Andrade, U. Moura, J. Januário, M.

Nascimento, L. Mariote, J. Reis, J. Oliveira. “Pioneering Hardware Modeling and Software Design for Optical

Infrastructure in the Autonomous Network Project,” (invited at) Optical Network Design and Modeling

(ONDM), Cartagena, Spain, May 2016.

1.3.3 Brazilian Patents

[P1] J. Januário, M. Garrich, J. Oliveira. “Arranjo e Método para Equalização Dinâmica em Cascata e Distribuída de

Canais Ópticos,” BR 10 2014 029519-4, Nov. 26th 2014.

[P2] B. Sarti, J. Oliveira, M. Garrich, U. Moura. “Processo de Calibração em Campo dos Amplificadores Raman

Distribuídos Contrapropagantes para Operação no Modo de Controle Automático de Ganho,” BR 10 2015

011437-0, May 19th 2015.

[P3] H. Carvalho, M. Garrich, J. Oliveira. “Método de Otimização Dupla para Operação de EDFAs e ROADMs

Baseados em WSS em Enlaces Ópticos WDM,” BR 10 2015 026250-7, Oct. 15th 2015.

[P4] M. Garrich. “Arquitetura Componível de Adição/Remoção de Canais para Multiplexadores Ópticos

Reconfiguráveis ,” BR 10 2015 026632-4, Oct. 20th 2015.

[P5] C. Diniz, M. Garrich. “Método de Pré-Filtragem Óptica para Otimização Espectral Multicanal,” BR 10 2015

029365-8, Nov. 24th 2015.

[P6] U. Moura, M. Garrich, J. Oliveira. “Método Cognitivo para o Ajuste do Ponto de Operação de Amplificadores

Ópticos em Redes Ópticas Dinâmicas,” BR 10 2015 030459-5, Dec. 4th 2015.