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15 December 1978 Techniques for Shot-Noise-Limited Inertial Rotation Measurement Using a Multiturn Fiber Sagnac Interferometer
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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.
© (1978) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
J. L. Davis and S. Ezekiel "Techniques for Shot-Noise-Limited Inertial Rotation Measurement Using a Multiturn Fiber Sagnac Interferometer", Proc. SPIE 0157, Laser Inertial Rotation Sensors, (15 December 1978); https://doi.org/10.1117/12.965477
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