Shot-noise-limited control-loop noise in an interferometer with multiple degrees of freedom
Applied Optics, Vol. 49, Issue 23, pp. 4335-4342 (2010)
http://dx.doi.org/10.1364/AO.49.004335
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Abstract
Precise measurements, such as those made with interferometric gravitational-wave detectors, require the measurement device to be properly controlled so that the sensitivity can be as high as possible. Mirrors in the interferometer are to be located at specific operation points to isolate laser noise and to accumulate the signal in resonant cavities. On the other hand, rigid control of an auxiliary degree of freedom may result in imposing sensing noise of the control on the target object as excess force noise. Evaluation of this so-called loop noise is important in order to design a decent control scheme of the measurement device. In this paper, we show the method to calculate the level of loop noise, which has been recently implemented in simulation tools that are broadly used for designing gravitational-wave detectors.
© 2010 Optical Society of America
OCIS Codes
(040.0040) Detectors : Detectors
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(140.0140) Lasers and laser optics : Lasers and laser optics
ToC Category:
Detectors
History
Original Manuscript: January 8, 2010
Revised Manuscript: June 18, 2010
Manuscript Accepted: July 7, 2010
Published: August 4, 2010
Citation
Kentaro Somiya and Osamu Miyakawa, "Shot-noise-limited control-loop noise in an interferometer with multiple degrees
of freedom," Appl. Opt. 49, 4335-4342 (2010)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-49-23-4335
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