== Optical lever ==

 * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=1759|JGW-T1301759]]: 台数

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=== Reference ===

 * [[https://dcc.ligo.org/LIGO-D1100290/public|LIGO-D1100290]]: aLigo Optical Lever QPD Amplifier