Title page for ETD etd-06102012-040337

Type of Document Master's Thesis
Author Vengsarkar, Ashish Madhukar
URN etd-06102012-040337
Title Novel microbend loss fiber optic hydrophones for direction sensing
Degree Master of Science
Department Electrical Engineering
Advisory Committee
Advisor Name Title
Claus, Richard O. Committee Chair
Pieper, Ronald J. Committee Member
Safaai-Jazi, Ahmad Committee Member
  • Optoelectronics
Date of Defense 1988-08-05
Availability restricted
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 fibers wound around them. Axial slots, cut along the length of the cylinder

and deeper than the threads, provide the microbends. Three different

construction schemes for cylindrical sensing elements are built. The dual purpose

hydrophones are characterized for frequencies ranging from 15 kHz to 75 kHz.

Based on the results, an improved design that uses the wavelength dependence

of microbend loss in a single mode fiber is proposed.

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