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Proceedings Paper

Techniques For Shot-Noise-Limited Inertial Rotation Measurement Using A Multiturn Fiber Sagnac Interferometer
Author(s): J. L. Davis; S. Ezekiel
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Paper Abstract

Two methods are presented for sensitive measurement of nonreciprocal phase shift (NRPS) in a multi-turn fiber Sagnac interferometer for application in inertial rotation sensing. Both techniques are capable of producing an NRPS modulation of amplitude ±π/2 radians at a rate sufficiently high for shot-noise-limited performance. The first method produces an NRPS by generating a nonreciprocal refractive index using the electro-optic effect, and requires orthogonal polarization in the cw and ccw beams. The second method produces an NRPS by generating a nonreciprocal propagation frequency using two acousto-optic shifters; there is no requirement on light polarization. When either method is used in conjunction with phase-sensitive detection, feedback compensation, and adequate laser intensity, shot-noise-limited measurement becomes possible. Preliminary performance data is included.

Paper Details

Date Published: 15 December 1978
PDF: 6 pages
Proc. SPIE 0157, Laser Inertial Rotation Sensors, (15 December 1978); doi: 10.1117/12.965477
Show Author Affiliations
J. L. Davis, Massachusetts Institute of Technology (United States)
S. Ezekiel, Massachusetts Institute of Technology (United States)

Published in SPIE Proceedings Vol. 0157:
Laser Inertial Rotation Sensors
Shaoul Ezekiel; G. E. Knausenberger, Editor(s)

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