Mullavey Adam J, Slagmolen Bram J J, Miller John, Evans Matthew, Fritschel Peter, Sigg Daniel, Waldman Sam J, Shaddock Daniel A, McClelland David E
Centre for Gravitational Physics, The Australian National University, Canberra, ACT, 0200, Australia.
Opt Express. 2012 Jan 2;20(1):81-9. 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.
预计臂腔镜的残余运动会成为先进引力波干涉仪中系统锁定获取的主要障碍之一。我们提出了一种技术，通过采用频率为基本测量频率两倍的辅助激光来预稳定臂腔长度，从而克服了这一问题。应用这种方法，我们将一个1.3米长、独立悬挂的法布里 - 珀罗腔的表观长度噪声降低至均方根值30皮米，并成功将系统的纵向控制从辅助激光转移至测量激光。
