Arm-length stabilisation for interferometric gravitational-wave detectors using frequency-doubled auxiliary lasers

作者：Mullavey Adam J^*; Slagmolen Bram J J; Miller John; Evans Matthew; Fritschel Peter; Sigg Daniel; Waldman Sam J; Shaddock Daniel A; McClelland David E

来源：Optics Express, 2012, 20(1): 81-89.

DOI：10.1364/oe.20.000081

Residual motion of the arm cavity mirrors is expected to prove one of the principal impediments to systematic lock acquisition in advanced gravitational-wave interferometers. We present a technique which overcomes this problem by employing auxiliary lasers at twice the fundamental measurement frequency to pre-stabilise the arm cavities' lengths. Applying this approach, we reduce the apparent length noise of a 1.3 m long, independently suspended Fabry-Perot cavity to 30 pm rms and successfully transfer longitudinal control of the system from the auxiliary laser to the measurement laser.

• 出版日期2012-1-2