aLIGO LSC RF Photodetector Schematic

Document #:

LIGO-D1101124-v8

Document type:

D - Drawings

Abstract:

Schematic and PCB files for the general purpose low noise RF photodetector for ISC length sensing. A de-Q'd version is also used in the PSL. See the related documents section (T1200428) for a spreadsheet detailing the component values specific to each application.

Files in Document:

• PDF of Schematic and Layout (aLIGO_LSC_pd_v8.pdf, file is not accessible)

Other Files:

• Altium Project File (Zipped) (aLIGO_LSC_pd_v8 (4-25-2017 10-19-40 AM).zip, file is not accessible)
• Gerber files for manufacture of board (aLIGO_LSC_GBR_v8.zip, file is not accessible)
• Zipped Simulation Files (LSC RFPD Simulation Files.zip, file is not accessible)
• odb++ files (aLIGO_LSC_v8.zip, file is not accessible)

ICS/JIRA Record:

• ICS_LINK

Topics:

• Final Design
• Sensing and Control

Authors:

• Rich Abbott

Keywords:

lsc rfpd

Notes and Changes:

Update Nov-27-2023: The datasheet can now be found at https://www.excelitas.com/product/c30642gh-ingaas-pin-2mm-5

The datasheet for the photodiode used in this design (C30642) can be accessed at: https://www.pacer.co.uk/Assets/User/1645-Large_Area_InGaAs_PIN.pdf

Version 8 - Had to order more boards. Brought PCB up to revision 8 and incorporated single supply protection features listed in version 7. Went through entire bill of materials and created variants for Squeezer CLF and OPO detectors

02-26-19 Luis added the next.
CFL RFPD 6.25MHz S1900052 uses a circuit as described on T1900075. 5.976µH and LT6202 device instead MAX4107.

Related Documents:

• LIGO-D1101124: aLIGO LSC RF Photodetector Schematic
• LIGO-T1200335: LSC Style RFPD Test Procedure
• LIGO-E1800064: ECR: Increase Transimpedance Gain for CLF Photodetector

Referenced by:

• LIGO-G1101199-v1: aLIGO LSC RF photodetector test
• LIGO-D1101174-v5: LSC RFPD ENCLOSURE - IN AIR - TOP ASSEMBLY DRAWING
• LIGO-T1200334-v9: LSC RFPD Measured Parameter Datasheet Template
• LIGO-T1300387-v1: Design Check of LSC RFPD
• LIGO-T1300506-v1: aLIGO RFPD Spot Check Procedure
• LIGO-D1102060-v1: aLIGO LSC RFPD Interface Schematic
• LIGO-E1400002-v1: ECR - Acquisition of FSS RFPD DC signal
• LIGO-T1200335-v4: LSC Style RFPD Test Procedure
• LIGO-S1203399-v5: LSC RFPD ( 24.078 MHz ) IMC
• LIGO-S1203398-v5: LSC RFPD ( 24.078 MHz ) IMC
• LIGO-E1400099: aLIGO LSC RF Photodetector
• LIGO-E1300016: DCN for component value changes to the LSC RFPD
• LIGO-D1101124-v8: aLIGO LSC RF Photodetector Schematic
• LIGO-D1101176-v6: LSC RFPD ENCLOSURE - MAIN BODY -v6
• LIGO-D1300466-v4: Typical In-vacuum RFPD LSC Wiring Chain for aLIGO