Improvement of the Sensitivity of a Polarimetric Heterodyne Fiber-Optic Underwater Acoustic Sensor

A method for improving the acoustic sensitivity of a heterodyne fiber-optic sensor system of polarimetric type is described. The sensitivity of a heterodyne fiber-optic sensor can be increased using the frequency multiplying technique. The present system uses a Zeeman laser, a polarization-maintaini...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 1992-01, Vol.31 (S1), p.269
Main Authors: Sugiyama, Osamu, Takahashi, Sumio, Kikuchi, Toshiki, Hirama, Koichi, Seya, Masahiro
Format: Article
Language:eng ; jpn
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Summary:A method for improving the acoustic sensitivity of a heterodyne fiber-optic sensor system of polarimetric type is described. The sensitivity of a heterodyne fiber-optic sensor can be increased using the frequency multiplying technique. The present system uses a Zeeman laser, a polarization-maintaining fiber and a frequency multiplier. The optical beat of two orthogonally polarized lights of a stabilized transverse Zeeman laser produces a carrier wave without a frequency shifter. The frequency multiplier increases the frequency of the carrier wave and the frequency deviation. The enhancement of the sensitivity was confirmed.
ISSN:0021-4922
1347-4065
DOI:10.7567/JJAPS.31S1.269