Optical phase modulator with asymmetric piezoelectric vibrator

Details Optical phase modulator with asymmetric piezoelectric vibrator Optical phase modulator with asymmetric piezoelectric vibrator

1991-06-04

1992-03-31

Healy, Brian

Optical waveguides

Temporal optical modulation within an optical waveguide

Electro-optic

385 12, 385 32, 25022711, 25022721, G02B 602, H01J 516

Patent

active

051014491

ABSTRACT:
An optical phase modulator for use with a fiber optic sensor such as a fiber optic gyroscope includes a piezoelectric vibrator which is asymmetric in at least one cross-sectional shape thereof, a pair of electrodes for applying a voltage to said piezoelectric vibrator, and an optical fiber joined to at least a portion of said piezoelectric vibrator by adhesive bonding. The piezoelectric vibrator has a cavity defined therein, and one of said electrodes is disposed on a surface of said piezoelectric vibrator which defines said axial cavity, the other electrode being disposed on an outer surface of said piezoelectric vibrator. The piezoelectric vibrator may be cylindrical, elliptically cylindrical, or planar in shape. The cavity may be cylindrical or elliptically cylindrical in shape.

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"Elimination of Drift in a Single-Mode Optical Fiber Interferometer Using A Piezoelectrically Stretched Coiled Fiber" by D. A. Jackson et al; Applied Optics/vol. 19, No. 17/1 Sep. 1980; pp. 2926-2929.
"Method of Phase-Modulating Signals in Optical Fibers: Application to Optical-Telemetry Systems" by D. E. N. Davies et al; Electronics Letters 24th Jan. 1974 vol. 10, No. 2; pp. 21 and 22.

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