Interconnect Solutions for the Optical Backplane Era Richard C. A. Pitwon
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Transcript of Interconnect Solutions for the Optical Backplane Era Richard C. A. Pitwon
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Interconnect Solutions for the Optical Backplane Era
Richard C. A. PitwonSenior Photonics Engineer
ECOC 2005, Glasgow
September ’05
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Overview
High Speed Parallel Optical Transceiver
Optical Backplane Connector
Optical Waveguide Interface Coupling Method
Novel Mechano-Photonic Interface Design
High Precision Waveguide Alignment Method
Proof-of-Concept Demonstrator Rig
Photonics Research & Development Showcase
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Optical Transceiver Circuit
Overview
Parallel Optical Transceiver
Quad Parallel Optical Transceiver
10 Gb/s per duplex channel
Flexible Laminate PCB
Daughtercard Pluggable
Mechano-Photonic Coupling Interface
Output Signal Characterisation @ 10.3 Gb/s
Patent Filed
Jitter ~30 ps
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Optical Transceiver Circuit
Overview
Photonic Interface
1x4 VCSEL Array
Raw Die Bond Wire Attachment
Mechanical Alignment Structures
High Precision Visual Alignment of GRIN
Lens Array to Active Areas
Multi-Terminal (MT) Compliant
Mechano-Photonic Interface
Source: ULM Photonics GmbH
Source: Microsemi Corporation
Source: GRINTech GmbH
1x4 PIN Array
1x12 GRIN Microlens
Array
Custom GRIN Lens Holder
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Optical Transceiver Circuit
Overview
Connector Mechanism
Mechano-Photonic Interface
Metallic Housing
Cam Lever Mechanism
Coarse Alignment Mechanism
Daughtercard Pluggable
Primary Function:
Elevation and Retraction of Photonic
Interface
Optical PCB Connector
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Optical Transceiver Circuit
Overview
Waveguide Alignment Method
Mechano-Photonic Interface
Low Cost Precision Assembly Method
Multi-Terminal (MT) Compliant Receptacle
Lithographically Patterned Mechanical Alignment Features
Successful Coupling of Mechano-Photonic Interface to Optical
PCB
Optical PCB Connector
Waveguide Alignment Method
Accuracy measured to within +/- 3 µm
www.exxelis.com
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Optical Backplane Engagement
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Optical Transceiver Circuit
Overview
Prototype Demonstrator
Mechano-Photonic Interface
2 Pluggable Daughtercards and
Connectors
Polymer Waveguide Optical PCB
Length: 10 cm
Optical PCB Connector
Waveguide Alignment Method
Proof-of-Concept Demonstrator
Passive Electrical Backplane
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Optical Transceiver Circuit
Overview
Test and Characterisation
Mechano-Photonic InterfaceReference Signal – No Waveguide
Jitter 0.34 UIRelative Loss 0 dB
Optical PCB Connector
Waveguide Alignment Method
Proof-of-Concept Demonstrator
Test & Characterisation
10 cm Waveguide with Isapropanol
Jitter 0.36 UIRelative Loss 4.5 dB
10 cm Waveguide – Diced and Polished
Jitter 0.56 UIRelative Loss 6.9 dB
10 cm Waveguide – Diced Only
Jitter 0.89 UIRelative Loss 7.9 dB
Characterisation of Optical Connector Coupling to Waveguide with 10.3 Gb/s 850 nm Optical Signal
Driven with 10 GbE LAN (10.3 Gb/s) traffic
Passed 4 hour soak test with no
errors
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Optical Transceiver Circuit
Overview
Exposition
Mechano-Photonic Interface
Optical PCB Connector
Waveguide Alignment Method
Proof-of-Concept Demonstrator
Test & Characterisation
Exposition
Demonstrator Exhibition Sites: • ECOC 2005, Glasgow• Photonex 2005, Stoneleigh, Coventry
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Optical Transceiver Circuit
Overview
Acknowledgments
Mechano-Photonic Interface
Optical PCB Connector
Waveguide Alignment Method
Proof-of-Concept Demonstrator
Test & Characterisation
Exposition
Acknowledgments
Optical Waveguide Fabrication:Navin Suyal
Exxelis LtdKelvin Campus, West of Scotland Science Park
Glasgow, G20 0TH
Polymer Waveguide Characterisation:Ioannis Papakonstantinou
David R. Selviah
Optical Systems and Devices GroupUCL
London
www.exxelis.com
Special Thanks toFrank Tooley (Photonix, Glasgow),
EPSRC and DTI
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Thank You for Your Attention!
Richard C. A. PitwonSenior Photonics Engineer
XyratexHampshire P09 1SAUnited Kingdom
www.xyratex.com
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Xyratex Team
Steve Thompson CTODave Milward Project ManagerKen Hopkins Hardware Architect