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Progress Report (November 21-December 3,2002)

Progress Report (November 21-December 3,2002). Progress:. Collected Revision A receiver board alignment tolerance data for a second z-axis value Revison B connectorized board built & tested Transmitter board alignment tolerance attempted on Revision B board

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Progress Report (November 21-December 3,2002)

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  1. Progress Report (November 21-December 3,2002) Progress: • Collected Revision A receiver board alignment tolerance data for a second z-axis value • Revison B connectorized board built & tested • Transmitter board alignment tolerance attempted on Revision B board • Unable to obtain measurements or an output signal from the transmit board • Theoretical troubleshooting only due to lack of time • Completed final written report including a cost analysis

  2. Receiver Board Alignment using second z-axis value • Lower tolerance observed due to • greater vertical distance between • the fiber and the PD

  3. Revision B Board Testing • Revision B Transmit and • Receive boards • Output from connectorized • boards • Output from attempted tolerance • alignment testing on unconnectorized • transmit board • Same output observed when the • transmit board was not powered

  4. Possible Reasons for Inability to Collect Alignment Data • Strongly suspect incorrect VCSEL was shipped • No tab on the VCSEL received but shown on data sheets • No other identifying marks on VCSEL • Very similar to another part but different pinouts • Attempted to contact vendor to explicitly identify part • Possibly incorrectly biased the VCSEL • Possible that we were below the threshold current • Did not want to risk damaging VCSEL by applying too much current because this was our third and only remaining unconnectorized VCSEL • Measured voltage and values within expected range • Condition of fiber in lab • Possible that the fiber was damaged

  5. HFE 4381/2-321: No tab HFE 4380-321: Shows Tab

  6. Cost Analysis Cost comparison between the connectorized and unconnectorized Boards Unconnectorized Board: $97.67 or $74.17 in bulk Connectorized Board: $39.42 or $25.07 in bulk Does not include board fabrication cost

  7. Gantt Chart

  8. Conclusion • Team achieved goals of successfully designing, building, and testing a GB compliant transmit and receiver boards • Successfully obtained alignment tolerance data for the receiver board for two different z-axis values • Likely that transmit board alignment tolerance data could have been obtained, time permitting • Team worked well together to accomplish goals

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