Microbend Loss Fiber Optic Direction And Amplitude Sensor For Underwater Applications

Ashish M. Vengsarkar; Kent A. Murphy; Tuan A Tran; Richard O. Claus

doi:10.1117/12.948849

1 February 1989 Microbend Loss Fiber Optic Direction And Amplitude Sensor For Underwater Applications

Ashish M. Vengsarkar, Kent A. Murphy, Tuan A Tran, Richard O. Claus

Author Affiliations +

Proceedings Volume 0985, Fiber Optic and Laser Sensors VI; (1989) https://doi.org/10.1117/12.948849
Event: O-E/Fiber LASE '88, 1988, Boston, MA, United States

Abstract

Dual purpose fiber optic microbend loss sensors have been developed for measurement of underwater acoustic wave amplitudes and for detection of the direction of wave propagation. Cylindrical sensing elements with external threads have fiber wound around them. Axial slots, cut along the length of the cylinder and deeper than the threads, provide the microbends. Two different construction schemes for cylindrical sensing elements are considered. The dual purpose hydrophones have been characterized for frequencies ranging from 15 kHz to 75 kHz. Long fibers with different coatings and sensing elements with different variations in mechanical wave-lengths can be shown to improve the sensitivity of the sensing system.

Citation Download Citation

Ashish M. Vengsarkar, Kent A. Murphy, Tuan A Tran, and Richard O. Claus "Microbend Loss Fiber Optic Direction And Amplitude Sensor For Underwater Applications", Proc. SPIE 0985, Fiber Optic and Laser Sensors VI, (1 February 1989); https://doi.org/10.1117/12.948849

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