Optical waveguide sensor system for remote detection

Details Optical waveguide sensor system for remote detection Optical waveguide sensor system for remote detection

G - Physics

01

H

G01H 9/00 (2006.01) G01V 1/16 (2006.01) G01V 1/22 (2006.01)

Patent

CA 2278356

An optical waveguide (28) formed in an integrated optics substrate (30) is included in an optical path of an interferometer (51). An optical signal source (12) is arranged to provide an optical signal to the interferometer (51). A channel waveguide phase modulator (38) its formed on the substrate (30) and arranged to phase modulate optical signals guided by the optical waveguide (28). Signals from a geophone (50) arranged to produce an electrical signal in response to mechanical vibrations are input to the phase modulator (38). The geophone (50) is connected to the channel waveguide phase modulator ((38) such that the electrical signal modulates the phase of the optical signal guided by the optical waveguide (28) so that the interference pattern output from the interferometer (51) indicates the amplitude of the mechanical vibrations. One or more optical fibers (24) are included in the interferometer (51) and are arranged to provide a mismatch between the interferometer path lengths

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