Magnetic field sensitivity of depolarized fiber optic gyros

James N. Blake

doi:10.1117/12.24731

1 February 1991 Magnetic field sensitivity of depolarized fiber optic gyros

James N. Blake

Proceedings Volume 1367, Fiber Optic and Laser Sensors VIII; (1991) https://doi.org/10.1117/12.24731
Event: SPIE Microelectronic Interconnect and Integrated Processing Symposium, 1990, San Jose, United States

Abstract

Results are presented of experimental measurements and an analysis of the magnetic field sensitivity of several types of depolarized fiber-optic gyros. It was found that depolarized gyros of the Bohm et al. (1981) and Fredricks and Ulrich (1984) configuration (having one depolarizer in the loop) can be highly sensitive to magnetic fields, while depolarized gyros incorporating Pavlath and Shaw concept (i.e., having unpolarized light enter and exit the loop) are insensitive to magnetic fields. It is shown that a gyro having all the advantages of both designs can be obtained by incorporating two depolarizers, one between the polarizer and the loop coupler and the other within the loop. A scheme of this type of fiber gyro is presented.

Citation Download Citation

James N. Blake "Magnetic field sensitivity of depolarized fiber optic gyros", Proc. SPIE 1367, Fiber Optic and Laser Sensors VIII, (1 February 1991); https://doi.org/10.1117/12.24731

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