2011/01/28 by Kentaro Somiya, K. Somiya, Daniel Heinert +6
Physics and Astronomy · #Acoustics #Advanced Frequency and Time Standards #Coating #Cold Atom Physics and Bose-Einstein Condensates #Composite material #Computer science #Fabry–Pérot interferometer #Interferometry #Materials science #Noise (video) #Noise reduction #Optical coating #Optics #Optoelectronics #Physics #Pulsars and Gravitational Waves Research #Reduction (mathematics) #Resonator #Thermal #Wavelength #gr-qc #quant-ph
paper · pdf · doi:10.1016/j.physleta.2011.02.009
published as Phys.Lett.A375:1363-1374,2011 · 12 pages, 7 figures
arxiv created 2011/01/28 · openalex publication_date 2011/02/07 · arxiv updated 2015/03/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Reduction of coating thermal noise is a key issue in precise measurements with an optical interferometer. A good example of such a measurement device is a gravitational-wave detector, where each mirror is coated by a few tens of quarter-wavelength dielectric layers to achieve high reflectivity while the thermal-noise level increases with the number of layers. One way to realize the reduction of coating thermal noise, recently proposed by Khalili, is the mechanical separation of the first few layers from the rest so that a major part of the fluctuations contributes only little to the phase shift of the reflected light. Using an etalon, a Fabry-Perot optical resonator of a monolithic cavity, with a few coating layers on the front and significantly more on the back surface is a way to realize such a system without too much complexity, and in this paper we perform a thermal-noise analysis of an etalon using the Fluctuation-dissipation theorem with probes on both sides of a finite-size cylindrical mirror.