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SFP+ Optical Transceivers: Optical Packaging Comparison of Prototypes

SFP+ Optical Transceivers: Optical Packaging Comparison of Prototypes. Hans Versmissen CERN – PH/ESE/BE – Opto 1 October 2009. Table of Contents. My Marie-Curie fellowship Introduction to my work Comparison of SFP+ optical transceivers Conclusion. My Marie-Curie fellowship.

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SFP+ Optical Transceivers: Optical Packaging Comparison of Prototypes

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  1. SFP+ Optical Transceivers: Optical Packaging Comparison of Prototypes Hans Versmissen CERN – PH/ESE/BE – Opto 1 October 2009

  2. Table of Contents • My Marie-Curie fellowship • Introduction to my work • Comparison of SFP+ optical transceivers • Conclusion ACEOLE 12 month meeting

  3. My Marie-Curie fellowship • 3 year fellowship at CERN (PH-ESE-BE/opto) • 6 months on secondment at VTT (Finland) • Packaging of optical transceivers (EMI, Thermal management, B-field, mechanical stress) • Goals • Cooperate actively in the Versatile Link project • Gain experience in electronics packaging and related fields ACEOLE 12 month meeting

  4. Situation • Increase of LHC luminosity means more data • GBT project  ASIC design • Versatile Link project  system architecture and components • The customized SFP+ optical transceiver is the front end key-component ACEOLE 12 month meeting

  5. SFP+ optical transceiver module • An optical transceiver (TRx) converts electrical signals to optical signals (Tx) and vice versa (Rx) • Enhanced Small Form Factor Pluggable (SFP+) is a commercial type of optical TRx which can operate at bitrates up to 10 Gbps • Customized SFP+ modules will be used in the read-out and control system of the SLHC experiments • My part of the job = customization of the package • Main requirements • Low power consumption • Minimum mass • Radiation hard electronics ACEOLE 12 month meeting

  6. SFP+ optical transceiver module • An optical transceiver (TRx) converts electrical signals to optical signals (Tx) and vice versa (Rx) • Enhanced Small Form Factor Pluggable (SFP+) is a commercial type of optical TRx which can operate at bitrates up to 10 Gbps • Customized SFP+ modules will be used in the read-out and control system of the SLHC experiments • My part of the job = customization of the package • Main requirements • Low power consumption • Minimum mass • Radiation hard electronics • Tests to be performed • General TRx performance tests • Complex tests: EMI, temperature management, B-field, mechanical stress Influence on Performance? ACEOLE 12 month meeting

  7. Comparison tests: setups • Tx and Rx independently and in loop-back configuration evaluated • Metrics: OMA, Amplitude, Eye height, Rise and Fall times, Overshoot, Jitter • Power consumption in loop-back configuration Jitter Amplitude Height Rise Time ACEOLE 12 month meeting

  8. Consistency tests • Test condition issues • Influence of temperature on data • Confidence interval • Consistency with previous measurements ACEOLE 12 month meeting

  9. Power consumption • SM generation 2 and 3 modules dissipate more power than SM generation 1 and MM modules • Different laser and electronics used ACEOLE 12 month meeting

  10. SM versus MM modules • MM modules show less overshoot and ringing but slower rise and fall times • They also perform better on amplitude and eye height SM MM ACEOLE 12 month meeting

  11. Evaluation with spider plot • Tool for comparison of the performance • Better performance of MM • No significant differences due to package stripping ACEOLE 12 month meeting

  12. Conclusions on comparisons • Increased power consumption of SM generation 2 and 3 modules due to different laser and electronics • No significant differences between generation 2 and generation 3 modules • In general, MM modules perform better than SM modules ACEOLE 12 month meeting

  13. Conclusions and future work • SFP+ prototypes, stripped from their package, have been tested and compared to other prototypes • Results will be used for further customizing • Secondment at VTT: • Learn from test methods and simulation tools (temperature, mechanical stress, EMI) • Compare methods: VTT - CERN • SpaceFibre project ACEOLE 12 month meeting

  14. Thanks for your attention ACEOLE 12 month meeting

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