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[[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 ]]		  . [[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 ]]

Photodetectors

In-vac design considerations

Types

Name

Schematics

Description

RF PD (List)

JGW-D1201280

For IR. Same schematic for both in-air and in-vac, but in different kind of box.

DC PD

Thorlabs PDA100A

For IR, in-air.

RF QPD (List)

JGW-D1402631

For IR. Same schematic for both in-air and in-vac, but in different kind of box.

DC QPD (List, Driver List)

JGW-D1402411

For IR, in-air (same as oplev QPD for now).

RF PD for green

(LIGO-D1002969)

For green, in-air (could be BB).

DC PD for green

Thorlabs PDA100A

For green, in-air (same for IR for now).

DC QPD for green

JGW-D1402411

For green, in-air (same for IR for now).

DC PD in vacuum

(LIGO-D1101059)

For IR, in-vac.

DC QPD in vacuum

(LIGO-T0900423)

For IR, in-vac, bare QPD without amplifier.

DC QPD in vacuum for green

(LIGO-T0900423)

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)

KAGRA/Subgroups/MIF/AEL/Photodetectors (last edited 2019-08-29 09:02:13 by KiwamuIzumi)