Theory of thermal phase noise in Michelson and Sagnac fiber interferometers

Keith H. Wanser

doi:10.1117/12.184996

14 September 1994 Theory of thermal phase noise in Michelson and Sagnac fiber interferometers

Keith H. Wanser

Proceedings Volume 2360, Tenth International Conference on Optical Fibre Sensors; (1994) https://doi.org/10.1117/12.184996
Event: 10th Optical Fibre Sensors Conference, 1994, Glasgow, United Kingdom

Abstract

The intrinsic thermal phase noise spectra of the Michelson, Michelson with phase conjugate mirrors, and Sagnac fiber optic interferometers are presented. The thermal phase noise is maximum at dc and zero at the loop frequency for the Michelson with ordinary mirrors. Thermal phase noise eliminates the factor of two transducer phase sensitivity advantage of the Michelson over a comparable length Mach Zehnder. The Michelson with two phase conjugate mirrors exhibits identical noise to a Sagnac interferometer with the same total fiber length. The Sagnac exhibits common mode phase noise rejection at low frequencies and a broad maximum in the phase noise at the loop frequency of ~1 .µrad rms/?Hz for a 1 km fiber ioop at 1319 nm.

Citation Download Citation

Keith H. Wanser "Theory of thermal phase noise in Michelson and Sagnac fiber interferometers", Proc. SPIE 2360, Tenth International Conference on Optical Fibre Sensors, (14 September 1994); https://doi.org/10.1117/12.184996

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