RF Photodetectors
This page (and only this page) contains all of the RF Photodetector data for the 40m. If you find pages elsewhere in this wiki, move them here.
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11 MHz |
22 MHz |
29.5 MHz |
33 MHz |
55 MHz |
110 MHz |
AS |
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REFL |
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POP |
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POY |
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MCREFL |
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MOVE ALL RFPD DATA to Electronics/RFPD/
State of PD Upgrade
Name |
Role\State |
Schematic |
Optical Response |
Noise at Resonant Freq. |
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REFL11 |
[attachment:] |
[attachment:2010-05-03_REFL11_CalibratedOpticalResponse.png 0-200 MHz] |
[attachment:2010-05-09_REFL11_CalibratedOpticalResponse0-500MHz_uncalibrated.png 0-500 MHz] |
[attachment:2010-04-09_REFL11NoiseMeasurements.png noise] |
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REFL55 |
[attachment:] |
[attachment:2010-05-03_REFL55_CalibratedOpticalResponse.png 0-200 MHz] |
[attachment:2010-05-09_REFL55_CalibratedOpticalResponse0-500MHz_uncalibrated.png 0-500 MHz] |
[attachment:] |
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AS55 |
[attachment:] |
[attachment:2010-05-05_AS55_CalibratedOpticalResponse.png 0-200 MHz] |
[attachment:2010-05-08_AS55_CalibratedOpticalResponse0-500MHz_uncalibrated.png 0-500 MHz] |
[attachment:2010-05-05_AS55_NoiseMeasurements.png noise] |
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POX |
[attachment:POX11.png schematic] |
[attachment:2010-05-05_POX11_CalibratedOpticalResponse_0-200MHz.png 0-200 MHz] |
[attachment:2010-05-08_POX11_CalibratedOpticalResponse0-500MHz_uncalibrated.png 0-500 MHz] |
[attachment:2010-05-05_POX11_NoiseMeasurements.png noise] |
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POY |
[attachment:POX11.png schematic] |
[attachment:2010-05-05_POY11_CalibratedOpticalResponse_0-200MHz.png 0-200 MHz] |
[attachment:2010-05-10_POY11_CalibratedOpticalResponse0-500MHz.png 0-500 MHz] |
[attachment:2010-05-09_POY11_NoiseMeasurements.png noise] |
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POP11 |
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POP55 |
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SPOB |
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REFL165 |
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REFL33 |
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Table of Contents
Contents
Documentation
In [https://nodus.ligo.caltech.edu:30889/svn/trunk/alberto/40mUpgrade/RFsystem/RFPDs/RFPDupgradeProcedure/RFPDupgradeProcedure.pdf this document] I explain all the steps of the 40m RF PD upgrade process.
SVN Repository
All the material relative to the upgrade of the RFPD for the 40m can be found in the 40m SVN repository under the following path:
https://nodus.ligo.caltech.edu:30889/svn/trunk/alberto/40mUpgrade/RFsystem/RFPDs/
Expected Power at the Ports
Arm Length = 38m
attachment:Field_RF_Power_38m.png
Arm Length = 37.5m
attachment:Field_RF_Power_375m.png
REFL11
attachment:40mUpgradeREFL11schematic.pdf
Schematic
Changes
Converted from PD2 (ex REFL33) with the following changes:
- L4: inductor 633nH
- L5: trim inductor: 1.4 uH
- C34: trim cap 1.5-50pF
- extra capacitor in parallel to PD: 100pF
- R4 (output resistance): 50 Ohm
[https://nodus.ligo.caltech.edu:30889/svn/trunk/alberto/40mUpgrade/RFsystem/RFPDs/RFPDlisoModels/RFPD11/rfpd11_testinput.fil REFL11 reference LISO model]
[https://nodus.ligo.caltech.edu:30889/svn/trunk/alberto/40mUpgrade/RFsystem/RFPDs/REFL11/REFL11Schematics/40mUpgradeREFL11schematic.pdf REFL11 New Schematic]
[https://nodus.ligo.caltech.edu:30889/svn/trunk/alberto/40mUpgrade/RFsystem/RFPDs/REFL11/2010-03-23_REFL11_model_to_meas_comparison.png REFL11 Measured Transfer Functions vs LISO model]
Data Files
- [attachment:rfpd11_testinput.fil REFL11 LISO model]
- [attachment:rfpd11_testinput.out REFL11 LISO model output TF]
- [attachment:2010-03-23_REFL11_electronics_response.dat REFL11 Measured electronics transfer tunction data]
- [attachment:2010-03-23_REFL11_optical_response.dat REFL11 Measured optical transfer tunction data]
Notes
Still To Do
- add a notch at 55MHz
measure and calibrate TFs
measure noise
check signal in the time domain
REFL55
Schematic
attachment:40mUpgradeREFL55schematic.pdf
Changes
Converted from PD6 (ex REFL199) with the following changes:
- D1: C30642GH
- L4: surface mount inductor Coilcraft 1206CS-820XL
- L5: trim inductor Coilcraft 164-04A06SL
- C34: trim cap 1.5-50pF
- C25: 0.1uF
- R24: removed
- resistor in series to L4 removed
- DC out resistor changed from 300Ohm to 30Ohm
- no change of output resistance: it was already 50Ohm
Data Files
- [attachment:REFL55-doublenotch.fil REFL55 LISO model]
- [attachment:REFL55-doublenotch.out REFL55 LISO model]
- [attachment:2010-04-12_REFL55_electronics_TF_200MHz_very_final.dat REFL55 Electronics transfer function]
- [attachment:2010-04-12_REFL55_optical_TF_500MHz_very_final.dat REFL55 Optical transfer function]
Still to do
- measure noise
check signal in the time domain
Notes
- The DC output seems 10 lower than AS55's.
AS55
Schematic
attachment:40mUpgradeAS55schematic.pdf
Changes
Converted from PD9 (ex ASDD_133) with the following changes:
- removed whitening filter at the DC output
- R22 changed from 100 Ohm to 10 Ohm
Data Files
- [attachment:AS55-doublenotch.fil REFL55 LISO model]
- [attachment:AS55-doublenotch.out REFL55 LISO model]
- [attachment: REFL55 Electronics transfer function]
- [attachment: REFL55 Optical transfer function]
Notes
- observed occasional ~mV oscillation at DC out
Some notes from Hartmut's commissioning of this PD in 2004 in the elog entries:
Still to do
measure and calibrate TFs
measure noise
check signal in the time domain
POX11
Schematic
Changes
Data Files
Notes
Still to do
- check signal in the time domain
POY11
Schematic
Changes
Output Signal
Data Files
Notes
Still to do
Things to do
- measure the AM calibration with the !GHz PD (1611)
- take full range transfer functions of all PDs
- glue down the big coils
- wipe the PD
- wipe the PD box, inside and outside
- take a picture of the measurement apparatus
Make label stickers for each photodiode, with:
- optical response
- resonant frequency
- transimpedance
- resonance Q
- shot noise 3dB point current
- notes