Reduced noise fiber optic towed array and method of using same

Details Reduced noise fiber optic towed array and method of using same Reduced noise fiber optic towed array and method of using same

1992-09-02

1994-09-06

Healy, Brian

Optical waveguides

With optical coupler

Plural

385 12, 356345, 25022711, 25022719, 367 16, 367 19, 367 20, G02B 628, G01B 902, H01J 516, G01V 138

Patent

active

053455223

ABSTRACT:
A sensitive towed optical fiber sensor array 50, wherein the fiber sensors (60A-60N) are connected in parallel, and the optical fiber cable (34) is paid out from the towing ship at a velocity about equal to but opposite to the velocity of the towing ship. The fiber sensors (60A-60N) are immune to electromagnetic interference, and the output of the sensors can be isolated readily to the parallel hookup of the sensors. Turbulence and acceleration noise is greatly reduced due to the manner in which the fiber cable (34) is paid out, and crosstalk between sensors is eliminated.

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"Characterization of an Eight-Element Time-Division Multiplexed Interferometric Fiber Sensor Array", A. D. Kersey et al., SPIE, vol. 985, Fiber Optic and Laser Sensors VI (1988) pp. 105-112.
"At-Sea Deployment of a Multiplexed Fiber Optic Hydrophone Array", M. L. Henning, C. Lamb, WDD5-1, OFS'88.

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