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See [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/DocDB/ShowDocument?docid=2986|JGW-D1402986|]] for location of photodetectors. See [[https://docs.google.com/spreadsheets/d/1EcuZOQP8yrD3s7no9PPGSxSD0V3NGAFvx799IeWH-1U/edit#gid=2019224000|this Google spreadsheet]] for list of photodetectors |
== In-vac design considerations == [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=10661 | Information from LIGO and VIRGO about in-vac PDs]] [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=10545 | PD feedthrough for ISS ]] == Types == ||Name ||Schematics ||Description || ||RF PD ([[KAGRA/Subgroups/MIF/AEL/Photodetectors/RFPDList|List]]) ||[[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=1280|JGW-D1201280]] ||For IR. Same schematic for both in-air and in-vac, but in different kind of box. || ||DC PD ||[[http://www.thorlabs.co.jp/thorproduct.cfm?partnumber=PDA100A|Thorlabs PDA100A]] ||For IR, in-air. || ||RF QPD ([[KAGRA/Subgroups/MIF/AEL/Photodetectors/RFQPDList|List]]) ||[[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/DocDB/ShowDocument?docid=2631|JGW-D1402631]] ||For IR. Same schematic for both in-air and in-vac, but in different kind of box. || ||DC QPD ([[KAGRA/Subgroups/AOS/DCQPDList|List]], [[KAGRA/Subgroups/AOS/DCQPDDriverList|Driver List]]) ||[[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=2411|JGW-D1402411]] ||For IR, in-air (same as oplev QPD for now). || ||RF PD for green ||([[https://dcc.ligo.org/LIGO-D1002969/public|LIGO-D1002969]]) ||For green, in-air (could be BB). || ||DC PD for green ||[[http://www.thorlabs.co.jp/thorproduct.cfm?partnumber=PDA100A|Thorlabs PDA100A]] ||For green, in-air (same for IR for now). || ||DC QPD for green ||[[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=2411|JGW-D1402411]] ||For green, in-air (same for IR for now). || ||DC PD in vacuum ||([[https://dcc.ligo.org/LIGO-D1101059|LIGO-D1101059]]) ||For IR, in-vac. || ||DC QPD in vacuum ||([[https://dcc.ligo.org/LIGO-T0900423/public|LIGO-T0900423]]) ||For IR, in-vac, bare QPD without amplifier. || ||DC QPD in vacuum for green ||([[https://dcc.ligo.org/LIGO-T0900423/public|LIGO-T0900423]]) ||For green, in-vac, bare QPD without amplifier. || == List == See [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/DocDB/ShowDocument?docid=2986|JGW-D1402986]] for location of photodetectors. See [[https://docs.google.com/spreadsheets/d/1EcuZOQP8yrD3s7no9PPGSxSD0V3NGAFvx799IeWH-1U/|this Google spreadsheet]] for list of photodetectors. |
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* iKAGRA configuration PMC: fPMC sideband / FRC: fIMC sideband / IMC: fIMC sideband, with ASC / FPMI: f1 sideband, without ASC / no ISS |
* iKAGRA configuration (PMC: fPMC sideband / FRC: fIMC sideband / IMC: fIMC sideband, with ASC / 3-km MI: f1 sideband, without ASC / no ISS) |
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* bKAGRA configuration PMC: fPMC sideband / FRC: fIMC sideband / IMC: fIMC sideband, with ASC / DRFPMI: f1,f2,f3 sidebands, with ASC / ALS: fALSX,fALSY sidebands, without ASC / with ISS |
* bKAGRA configuration (PMC: fPMC sideband / FRC: fIMC sideband / IMC: fIMC sideband, with ASC / DRFPMI: f1,f2,f3 sidebands, with ASC / ALS: fALSX,fALSY sidebands, without ASC / with ISS) |
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Photodetectors
In-vac design considerations
Information from LIGO and VIRGO about in-vac PDs PD feedthrough for ISS
Types
Name |
Schematics |
Description |
RF PD (List) |
For IR. Same schematic for both in-air and in-vac, but in different kind of box. |
|
DC PD |
For IR, in-air. |
|
RF QPD (List) |
For IR. Same schematic for both in-air and in-vac, but in different kind of box. |
|
DC QPD (List, Driver List) |
For IR, in-air (same as oplev QPD for now). |
|
RF PD for green |
For green, in-air (could be BB). |
|
DC PD for green |
For green, in-air (same for IR for now). |
|
DC QPD for green |
For green, in-air (same for IR for now). |
|
DC PD in vacuum |
For IR, in-vac. |
|
DC QPD in vacuum |
For IR, in-vac, bare QPD without amplifier. |
|
DC QPD in vacuum for green |
For green, in-vac, bare QPD without amplifier. |
List
See JGW-D1402986 for location of photodetectors. See this Google spreadsheet for list of photodetectors.
Modulation frequencies are listed in MIFIOOInterfaces.
- iKAGRA configuration (PMC: fPMC sideband / FRC: fIMC sideband / IMC: fIMC sideband, with ASC / 3-km MI: f1 sideband, without ASC / no ISS)
- bKAGRA configuration (PMC: fPMC sideband / FRC: fIMC sideband / IMC: fIMC sideband, with ASC / DRFPMI: f1,f2,f3 sidebands, with ASC / ALS: fALSX,fALSY sidebands, without ASC / with ISS)
For aLIGO, PD/QPDs below are in vacuum (see LIGO-T1000264).
- RF PDs for REFL, POP, AS
- RF QPDs for REFL, AS
- DC QPDs for MC2TRANS, POP, TRX, TRY, OMC (they don't have in air versions)