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Photonic Technology Laboratory (PTLab)Centre for Research in Photonics at the University of Ottawa, School of Information Technology and Engineering
University of Ottawa, 800 King Edward Avenue, Ottawa ON K1N 6N5, Canada
http://ptlab.site.uottawa.ca
Themes• Quantum dot semiconductors• Quantum well semiconductor lasers• All optical logic, fibre ring lasers• Integrated power splitter and optical switch• Polarisation insensitive wavelength converter• Nonlinear optics in crystals
DFB P1 EDFA1
DFB P2 EDFA2
Pump 1
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3 dB OC
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OSA Output Spectra
S1
C2 C3 C4
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SOA
OSA
SOA
PBS PBS
Isolator
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Wavelength Conversion by FWM in SOAs (with Dr. Lu, IMS NRC):
Enabling device technologies
Established by Professor Trevor J. Hall in August 2002.
Vision• To contribute new networking, switching and device concepts that improve the service to endusers by
• the migration of photonics from the core to the edges of the network and• the penetration of photonics into the nodes themselves.
• To realise 3D integrated active photonics with the intelligence required for communications and computing applications.
SupportWe are supported by governmental and industrial organizations such as NSERC, CMC, PRO, CRC, CPFC, Nortel Networks, JDS Uniphase, Agilent, Altera, Cyrium Technologies, and others.
Our laboratory
Themes• Building demonstrators with electronics implemented with FPGA technology• Different optical technologies used• Study of various control mechanisms
• Flexible Bandwidth Provision in a Packet Switch with an Optical Core (FBP)• Load Balancing in a Packet Switch with Layered CrossPoint Queues (LCPQ)
Opto-electronic packet switches
Global Controller(FBP Scheduling)
8 in
put p
orts
8 output ports
Optical Switch Fabric
DWDM Optical Links
Input Sectors Output Sectors
Controller
Themes• Reconfigurable Optical AddDrop Multiplexers (ROADMs)
• Studies of architectures, protocols, devices, and control methods for this technology
• Metro Agile AllOptical Ring Networks• Dynamic routing, wavelength and timeslot assignment schemes
• Recirculating loop testbed• To evaluate network scenarios, control
strategies and device technologies• Multiple concatenated ROADMs
through multiple passes on the loop through a single device
• Provides a costeffective manner of investigation
• To devise creative solutions to engineeringchallenges like:
• synchronisation• optical amplifier transients• dynamic OSNR optimization
Reconfigurable optical networks
SW1
SW2
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EDFA
75 km of NZ_DSF
WSS
BERT
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CDR
Timing circuitary
Scope
VOAModulatorLaserOptical
Electrical
Gating
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AAPN architecture• An overlaid star WDM network with very fast switching at the core (1µs) • Wavelengths are shared in the time domain by several information flowsThemes• Bandwidth allocation schemes• Design of scalable optical core switch architectures• Design of edge node architectures• Deploying AAPN over reconfigurable optical networks • Demonstrator prototype implementation
Agile All- Photonic Networks
Core Node
Edge Node
Themes• Fourier lens design for freespace interconnects• POGED: A fast alternative to computer generated holograms design by simulated annealing
• Gratings fabricated at the Institute for Microstructural Sciences (NRC)
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Reconstructed image
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Optical interconnects
Fourier lens system
Freespace interconnect
Reconstructed digital image
Designed grating
Fabricated grating
8.0 m
AFM image of the grating
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Diffraction Grating
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Projected image from fabricated grating
IIIV Semiconductor Photonic Device Integration on GroupIV Substrates
• Can we use GaAs on Ge solar cells as a micromote's renewable energy source?
• A micromote is a chip of ~1 mm3 that incorporates • autonomous sensing• computing systems• communication systems
• Micromotes (“smart dust”) are used in wireless sensor networks
• The designed solar cells are fabricated at the Canadian Photonics fabrication Facility and characterized and tested at the University of Ottawa
Monolithically Integrated InGaAsP/InP 1x2 SOA Optical Switch
• Design of a practical 1x2 monolithically integrated SOAbased switching element
• Objective: use it in larger switching fabrics such as ROADMs
• Implemented using singlemode vertical integration (SMVI)
• Fabricated at the Centre for Emerging Device Technology at MacMaster University
Photonic device integration
Schematic of a high efficiency solar cell
Switch element design
Wafer was grown using MBE
Po
wer
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