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Demodulators For Optical Fiber Interferometers With [3 x3] Outputs

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Author
KeoIian, Robert M.
Garrett, Steven L.
Cameron, Charles B.
Date
1994-05-17
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Abstract
A highly sensitive optical fiber interferometer sensor comprising a laser light source, a [2 X 2] optical fiber coupler to split the beam in two, a differential transducer which converts a signal of interest into optical phase shift in the laser light transmitted through the two optical fibers in the interferometer and a [3 X 3] optical fiber complex which recombines the two beams, producing interference which can be electronically detected. The use of the [3 X 3] coupler permits Passive Homodyne demodulation of the phase-modulated signals provided by the interferometer without feedback control or modulation of the laser itself and without requiring the use of electronics within the interferometer
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Patent
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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http://hdl.handle.net/10945/7219
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