2011/12/14 by A. Mullavey, Adam J. Mullavey, Bram J. J. Slagmolen +13 · 3 citations
Engineering · Physics and Astronomy · #Advanced Fiber Laser Technologies #Advanced Frequency and Time Standards #Geophysics and Sensor Technology #gr-qc #physics.ins-det
paper · pdf · doi:10.1364/oe.20.000081
published as Optics Express, Vol. 20, Issue 1, pp. 81-89 (2012)
arxiv created 2011/12/14 · openalex publication_date 2011/12/19 · arxiv updated 2011/12/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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.