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Thessaloniki, 20/21. 6. 2002
Reliability of Optical Components and Devices in Communications Systems and Networks
COST 270
COST Action 270
Reliability of Optical Components and Devices in Communications Systems and Networks
Vice chairman: Aleksandar OpacicHuber and Suhner, SWITZERLAND
Thessaloniki, 20/21. 6. 2002
Reliability of Optical Components and Devices in Communications Systems and Networks
COST 270
Overview
• Structure• Objectives for the action and WG’s• Free Space Communication • Results of each WG• High Optical Power Issues• Future issues
Thessaloniki, 20/21. 6. 2002
Reliability of Optical Components and Devices in Communications Systems and Networks
COST 270
COST 270 MC
Working group 1 Working group 2
Study group 1
Study group 2
Study group 3
COST Action 270: today's structure
Network Availability
Components Reliability
Thessaloniki, 20/21. 6. 2002
Reliability of Optical Components and Devices in Communications Systems and Networks
COST 270
Transmission NetworkAerial
Manhole
Direct Burried
Handhole
Vaultor
Basement
Premise cabling WallStreet cabinets
Thessaloniki, 20/21. 6. 2002
Reliability of Optical Components and Devices in Communications Systems and Networks
COST 270
Action objectives• methods to ascertain and improve the reliability of
new types of optical components,• transmission network and component costs based on
performance and installation requirements, • trunk, core, access and in-house networks,• failure mechanisms, life tests and lifetime
estimation methods• collaboration: manufacturers and research
institutes/universities• technical background for ETSI, CENELEC, IEC,
and ITU-T
Thessaloniki, 20/21. 6. 2002
Reliability of Optical Components and Devices in Communications Systems and Networks
COST 270
Working Group 1
Reliability of optical networks and systems including transport and access network and free space communication
Chairman: Lena WosinskaRoyal Inst. of Technology, SWEDEN
Thessaloniki, 20/21. 6. 2002
Reliability of Optical Components and Devices in Communications Systems and Networks
COST 270
• Investigation of availability performance of optical networks in order to define the weak points in the network and develop a methodology for designing optical networks that are robust to failures.
WG1 objective
Thessaloniki, 20/21. 6. 2002
Reliability of Optical Components and Devices in Communications Systems and Networks
COST 270
Results WG1• Availability of the optical networks
– Limitations caused by reliability requirements on network design and size
– Limiting factors for scalability of optical networks– Efficiency of a reparation process (fibre cable)
• Reliability of access networks– Review of technologies for LAN and MAN based on
Ethernet and ATM
• Gathered reliability data for components– Rel. handbook RDF2000, France Telecom (FIT numbers
of components for optical networks)
Thessaloniki, 20/21. 6. 2002
Reliability of Optical Components and Devices in Communications Systems and Networks
COST 270
Free Space Laser Communication
Alternative and Supplement / Extension to existing Broadband Communication Techniques
Cost effective and fast installation Broadband solution for „Last Mile Access“! Availability evaluation of existing systems Reliability and Availibilty is mainly determined by
local wheather (fog, rain and snow )
Thessaloniki, 20/21. 6. 2002
Reliability of Optical Components and Devices in Communications Systems and Networks
COST 270
Free Space Laser Communication (cont.)Outside plant! Summer months:
Availibility better than 99.9 %
Fog and rain: total signal loss
Thessaloniki, 20/21. 6. 2002
Reliability of Optical Components and Devices in Communications Systems and Networks
COST 270
Working Group 2
reliability of passive components including jumper cables
effects of high optical power application
Chairman: Francis BerghmansSCK.CEN, BELGIUM
Thessaloniki, 20/21. 6. 2002
Reliability of Optical Components and Devices in Communications Systems and Networks
COST 270
Results WG2• Polyimide coated Fibre Bragg gratings (FBG)
–Humidity transducer/ Enhanced sensitivity to temperature
• Connectors in outside plant –UV-light when re-connecting/ Corrosion/Re-
connecting and cleaning • Optical fibres
–Aged fibre surface in various conditions–OLCR characterisation of standard acrylate coated
fibres• Optical power splitters
–Present lifetime predictions are too conservative at low humidity
Thessaloniki, 20/21. 6. 2002
Reliability of Optical Components and Devices in Communications Systems and Networks
COST 270
Results WG2 (cont.)
• 3 Study groups were established• Reliability of FBG’s
– state of the art of FBG reliability – Round-robin campaign on FBG measurements
• Life testing of polymeric fibre materials– general approach of increasing impact of natural
variables (temperature, solar irradiation, moisture) to induce faster degradation
• A complete study plan for connectors was presented
• Informal liaison with standardisation bodies for passive components was set up
Thessaloniki, 20/21. 6. 2002
Reliability of Optical Components and Devices in Communications Systems and Networks
COST 270
High Power Issues Rationale
–DWDM and fibre amplifier technology networks carrying a significant amount of optical power (2 W !)
High Power Effects–Raman-gain and fibers, splices and connectors?–Damage threshold,–Intrinsic or extrinsic damage, –Improvement possibilities against extrinsic damage,–New field of reliability – standardization bodies needs, –Need for new manufacturing procedures and design rules
Table of components and associated high power failure modes and mechanisms was established
Thessaloniki, 20/21. 6. 2002
Reliability of Optical Components and Devices in Communications Systems and Networks
COST 270
FP6 EoI Proposal: 6.2002CHOPIN
Title Coping with High Power In optical communication Networks
Participation 5 institutes and 3 private companies
Principle objective• assess the reliability under high optical power• support scientific and laboratory work • contribute to world-wide standardization, network of
excelence
Thessaloniki, 20/21. 6. 2002
Reliability of Optical Components and Devices in Communications Systems and Networks
COST 270
Study Group 1 optical connectors and patchcords high optical power applications reliability based on reasonable mathematical model and
tailored testing procedures accepted by manufacturers, OEM/system suppliers and
end users
implementation in international standardization bodies. Special rapporteur: Peter KrausseDiamond SA, Switzerland
Thessaloniki, 20/21. 6. 2002
Reliability of Optical Components and Devices in Communications Systems and Networks
COST 270
Reliability/FIT Connectors Patchcords
Failures- mode- mechanism
Reliability/acceleratedtest models- FIT
Similarity effects- materials- types
Field data
Existing standardsIEC, Telcordia
Performance/FunctionalityRequirements
Acceleratedtests - FIT
Work area SG1
Thessaloniki, 20/21. 6. 2002
Reliability of Optical Components and Devices in Communications Systems and Networks
COST 270
Study Group 2: FibresSpecial rapporteur: Prof. Frederique de Fornel, Univ. Bourgogne, France
• Study Group 3: Fibre Bragg GratingsSpecial rapporteur: Dr. Hans Limberger, IOA-EPFL, Switzerland
Other study groups
Thessaloniki, 20/21. 6. 2002
Reliability of Optical Components and Devices in Communications Systems and Networks
COST 270
Future activitiesCOST 270:• meeting in Kista/Sweden 28/30 June 2002 (4 new participants and 1
STM)• workshop (with SPIE) Oct./Nov. 2002 in Brugge/Belgium
WG1:• models for survivability, cost studies, network optimisation • weak points in the network, components reliability data• requirements for components, study of FTTH networks
WG2:• Determination/interface within new structure• Create network for high optical power impact • Test activities, close liaison to standardization bodies
Thessaloniki, 20/21. 6. 2002
Reliability of Optical Components and Devices in Communications Systems and Networks
COST 270
Summary• 13 signatories• combination of manufacturer and institutes• science based on extensive theoretical and laboratory
work• some results up to now• high optical power issues through the whole action • splitting into smaller SG’s for better • FoI FP6 as supporting activity• liaison to standardization bodies
Thessaloniki, 20/21. 6. 2002
Reliability of Optical Components and Devices in Communications Systems and Networks
COST 270
Thank you for your attention!