Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1992-08-24
1995-03-28
Turner, Samuel A.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
356345, G01B 902
Patent
active
054022312
ABSTRACT:
Wavelength division multiplexed Sagnac distributed sensor systems that allow the determination of the position and amplitude of a frequency dependent environmental effect acting on the optical path of Sagnac loops. The sensor includes two Sagnac interferometers operating at different wavelengths and having optically spaced combining couplers and optical loops which include as portions thereof, the optical path. The outputs of the Sagnac interferometers are summed to determine the relative amplitude of the sensed effect and compared to determine its position on the optical path.
REFERENCES:
patent: 4639138 (1987-01-01), Martin et al.
patent: 5146292 (1992-09-01), Buehler et al.
Kim Robert
McDonnell Douglas Corporation
Turner Samuel A.
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