Sensor using fiber interferometer

Details Sensor using fiber interferometer Sensor using fiber interferometer

1986-08-27

1988-09-27

Willis, Davis L.

Optics: measuring and testing

By particle light scattering

With photocell detection

250227, G01B 902

Patent

active

047737581

ABSTRACT:
A closed loop optical fiber interferometer is used in sensing a quantity, Q, by applying a time varying or modulated measure of, Q, asymmetrically to the closed loop (24) and detecting phase shift between two counterpropagating optical signals in the closed loop. The closed loop (24) can be used as the sensing element or a separate sensor (68, 70) can develop a time varying signal which is then applied to the closed loop interferometer.

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patent: 4322829 (1982-03-01), Davis et al.
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patent: 4342517 (1982-08-01), Johnson et al.
patent: 4375680 (1983-03-01), Cahill et al.
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Rashleigh, "Magnetic-field sensing with a single-mode fiber", Optics Letters, vol. 6, No. 1, pp. 19-21, 1/81.

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