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{{https://gwdoc.icrr.u-tokyo.ac.jp/DocDB/0074/E1707416/001/DSC_0055.JPG|width=10}} {{https://gwdoc.icrr.u-tokyo.ac.jp/DocDB/0074/E1707416/001/DSC_0055.JPG|ALS Configuration|width=500}}
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== To Be Determined == == To Do ==
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=== Electronics ===
 * Common Mode Servo Board [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=3705|JGW-D1503705]]
 * PLL Board (similar to CMB)
 * Phase Frequency Discriminator [[https://dcc.ligo.org/LIGO-D1002476/public|LIGO-D1002476]]
 * Fast version of IQ Demodulator [[https://dcc.ligo.org/LIGO-E1100044/public|LIGO-E1100044]]
 * RF Oscillator for PDH [[https://www.keysight.com/ja/pdx-x201911-pn-N5181B/mxg-x-series-rf-analog-signal-generator-9-khz-to-6-ghz?cc=JP&lc=jpn|Keysight N5181B MXG]]
 * VCO for PLL [[https://www.keysight.com/ja/pdx-x201773-pn-E8663D/psg-rf-analog-signal-generator-100-khz-to-9-ghz?cc=JP&lc=jpn|Keysight E8663D]]
 * Frequency counter (optional) [[https://www.keysight.com/ja/pd-1893411-pn-53220A/350-mhz-universal-frequency-counter-timer-12-digits-s-100-ps?cc=JP&lc=jpn|Keysight 53220A]]?

=== Optics, Opto-electronics ===
 * Broadband PD for PLL [[https://www.newport.com/p/818-BB-21A|Newport 818-BB-21A]] (1.2 GHz bandwidth)
 * Resonant PD for green PDH [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=1280|JGW-D1201280]]
 * AOM and AOM driver (to be determined)
 * QPD for green beam pointing?
 * Picomotor mount?

=== Optics ===
 * Faraday isolator [[https://www.thorlabs.co.jp/thorproduct.cfm?partnumber=IO-5-532-HP|Thorlabs IO-5-532-HP]]
 * Periscopes ([[https://www.thorlabs.com/navigation.cfm?guide_id=54|Thorlabs Ø1.5inch Post Assembly]])
 * Dichroic mirror: LEO DRX-1064/532-45P-UF-2038
 * Harmonic splitter: LEO LWP-45-R532-T1064-UF-2038

=== Fiber optics ===
 * Fiber
 * Fiber collimator (Tholabs PAF? Fixed focus collimator?)

Arm Length Stabilization System

Configuration (One Arm)

ALS Configuration

To Do

List of Items

Electronics

Optics, Opto-electronics

  • Broadband PD for PLL Newport 818-BB-21A (1.2 GHz bandwidth)

  • Resonant PD for green PDH JGW-D1201280

  • AOM and AOM driver (to be determined)
  • QPD for green beam pointing?
  • Picomotor mount?

Optics

Fiber optics

  • Fiber
  • Fiber collimator (Tholabs PAF? Fixed focus collimator?)

Documents

KAGRA/Subgroups/IOO/ALS (last edited 2022-05-09 20:33:42 by miyoki)