aLIGO ASC RF Photodetector (WFS) Schematic

Document #:

LIGO-D1101614-v5

Document type:

D - Drawings

Abstract:

Schematic and PCB files for the aLIGO ASC RF photodetector, aka Wavefront Sensor.

Files in Document:

• PDF of Schematic and Layout (aLIGO_wfs_v5.pdf, file is not accessible)

Other Files:

• Altium Project Files (zipped) (aLIGO_wfs_v5 (1-14-2014 2-47-20 PM).zip, file is not accessible)
• Bill of materials in Excel Format (aLIGO_wfs_BOM_v4.xlsx, file is not accessible)
• Zipped ODB++ Files (aLIGO_wfs_odb.zip, file is not accessible)
• zipped Gerber Files for Board Manufacture (aLIGO_wfs_gerber_v3.zip, file is not accessible)

ICS/JIRA Record:

• ICS_LINK

Topics:

• Final Design
• Sensing and Control

Authors:

• Rich Abbott

Keywords:

photodetector asc wfs rfpd

Notes and Changes:

Update Nov-27-2023: The datasheet for the photodiode is now at: https://www.osioptoelectronics.com/products/photodetectors/quadrant-psd

The datasheet for the photodiode used in this design (Q3000) can be accessed at: http://www.osioptoelectronics.com/Libraries/Datasheets/Segmented-InGaAs-Quadrant-Photodiodes.sflb.ashx

Version 5 has a schematic change wherein D12 was found to be backwards on the V4 schematic. V5 corrects this, but the current layout (V3) is still deployed and has not been superseded. The V3 board has the silkscreen for D12 backwards, so care must be taken.
BOM is still current using V4 schematic parts.

Referenced by:

• LIGO-G1101199-v1: aLIGO LSC RF photodetector test
• LIGO-T1200347-v1: ASC (WFS) Style Detector Test Procedure
• LIGO-T1300506-v1: aLIGO RFPD Spot Check Procedure
• LIGO-T1300488-v4: Guide to Troubleshooting aLIGO RFPDs
• LIGO-S1300632-v4: In-Vacuum WFS RFPD (36 MHz and 45 MHz)
• LIGO-S1300633-v4: In-Vacuum WFS RFPD (36 MHz and 45 MHz)
• LIGO-S1300634-v3: In-Vacuum WFS RFPD (36 MHz and 45 MHz)
• LIGO-S1300635-v4: In-Vacuum WFS RFPD (36 MHz and 45 MHz)
• LIGO-D1101865-v1: aLIGO Wavefront Sensor Interface Schematic
• LIGO-T1300199-v2: Component Values for ISC/IO WFS/ASC RFPD Designs
• LIGO-E1400103: aLIGO ASC RF Photodetector (WFS)
• LIGO-S1300505-v4: aLIGO In- Air ASC (WFS) dual frequency RF photodiode ( 9.1 & 45.5 MHz )
• LIGO-S1301243-v2: aLIGO In-Vacuum ASC (WFS) dual frequency RF photodiode ( 9 & 45 MHz )
• LIGO-S1301242-v3: aLIGO In-Vacuum ASC (WFS) dual frequency RF photodiode ( 9 & 45 MHz )
• LIGO-D1101202-v3: ASC IN-AIR ENCLOSURE - MAIN BODY
• LIGO-D1300467-v4: Typical In-vacuum RFPD ASC Wiring Chain for aLIGO