1 / 8

Progress Report (November 21-December 3,2002)

This progress report highlights the collection of alignment tolerance data, testing of revision B boards, and the completion of a cost analysis. Possible reasons for the inability to collect alignment data are also discussed.

borchert
Download Presentation

Progress Report (November 21-December 3,2002)

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  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

More Related