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Published June 12, 2009 | public
Journal Article

Reduction and Possible Elimination of Coating Thermal Noise Using a Rigidly Controlled Cavity with a Quantum-Nondemolition Technique

Abstract

Thermal noise of a mirror is one of the most important issues in high-precision measurements such as gravitational-wave detection or cold damping experiments. It has been pointed out that thermal noise of a mirror with multilayer coatings can be reduced by mechanical separation of the layers. In this Letter, we introduce a way to further reduce thermal noise by locking the mechanically separated mirrors. The reduction is limited by the standard quantum limit of control noise, but it can be overcome with a quantum-nondemolition technique, which finally raises a possibility of complete elimination of coating thermal noise.

Additional Information

©2009 The American Physical Society. Received 11 November 2008; published 9 June 2009. The author would like to thank Professor Yanbei Chen for valuable discussions. This research is supported by Japan Society for the Promotion of Science (JSPS). # 07.60.Ly Optical interferometers # 05.40.Jc Brownian motion # 42.30.Lr Modulation and optical transfer functions # 95.55.Ym Gravitational radiation detectors; mass spectrometers; and other instrumentation and techniques

Additional details

Created:
August 21, 2023
Modified:
October 19, 2023