Optics: measuring and testing – By particle light scattering – With photocell detection
Patent
1999-02-19
2000-08-01
Kim, Robert H.
Optics: measuring and testing
By particle light scattering
With photocell detection
356352, 385 12, G01B 902
Patent
active
060974869
ABSTRACT:
A fiber optic acoustic sensor array is based upon a Sagnac interferometer rather than being based upon Mach-Zehnder interferometers as in known acoustic sensor arrays. The fiber optic acoustic sensor array is used to detect acoustic waves in water. By basing the sensor array on the Sagnac interferometer rather than on a Mach-Zehnder interferometer, the sensor array has a stable bias point, has reduced phase noise, has a larger dynamic range, and allows a broadband signal source to be used rather than requiring a more expensive narrowline laser. A large number of acoustic sensors can be multiplexed into the architecture of the Sagnac interferometer.
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Digonnet Michel J. F.
Kino Gordon S.
Shaw H. John
Vakoc Benjamin J.
Kim Robert H.
The Board of Trustees of the Leland Stanford Junior University
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