Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1981-07-22
1984-06-05
Sikes, William L.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
356357, G01B 902
Patent
active
044525338
ABSTRACT:
A sensor for sensing conditions such as acoustic waves, temperature changes, acceleration current and magnetic fields. The sensor employs a diode laser having its cavity contained between end facets defined by partially reflective mirrors, supplemented by an external cavity formed between one of the end facets of the laser and a translatable external reflector. The reflector is position-responsive to a condition to be sensed. A change in the reflector's positions causes laser output light to be fed back through the mirror into the laser cavity with varying phase such that an increase or decrease in laser emission is created. A change of detector voltage or change in laser current provides an indication of environmental condition being sensed.
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"Fabry-Perot Interferometric Sensor", R. O. Miles, A. Dandridge, A. B. Tveten, and Thomas G. Giallorenzi, Third International Conference on Integrated Optics and Optical Fiber Communication, San Francisco, CA., Apr. 27-29, 1981.
Salathe, "Diode Lasers Coupled to External Resonators", Applied Physics, vol. 20, pp. 1-18, 1979.
Giallorenzi Thomas G.
Miles Ronald O.
Tveten Alan B.
Beers Robert F.
Ellis William T.
Koren Matthew W.
Sikes William L.
The United States of America as represented by the Secretary of
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