Prebiased microbending optical sensor

Ali M. Golbazi

doi:10.1117/12.255380

25 October 1996 Prebiased microbending optical sensor

Ali M. Golbazi

Proceedings Volume 2839, Fiber Optic and Laser Sensors XIV; (1996) https://doi.org/10.1117/12.255380
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

Abstract

This paper presents a pre-biased fiber optic microbending sensor where perturbation is based on the number of microbends rather than the bending amplitude. The sensor uses a graded index fiber where a portion of the fiber is pre-bent to bias the sensor precisely at the peak of the loss curve. This can be achieved by matching the bending period of the pre-bent fiber to the resonance spatial frequency of the fiber itself. In principle, the sensor operates based on the conventional microbending sensing schemes, however, the emphasis on the bending amplitude is relaxed to prevent the rapid degradation of the fiber and to prolong the sensor lifetime. It also is shown that the proposed sensor shows higher sensitivity than the amplitude based sensor.

Citation Download Citation

Ali M. Golbazi "Prebiased microbending optical sensor", Proc. SPIE 2839, Fiber Optic and Laser Sensors XIV, (25 October 1996); https://doi.org/10.1117/12.255380

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