Michaelson optical fiber interferometer and its application in p

Details Michaelson optical fiber interferometer and its application in p Michaelson optical fiber interferometer and its application in p

1988-03-24

1990-04-17

McGraw, Vincent P.

Optics: measuring and testing

By particle light scattering

With photocell detection

356 43, 374161, G01B 902

Patent

active

049184920

ABSTRACT:
The interferometer comprises an emitter arm (10) excited by a source (11) and a receiver arm (20) associated with a photodetector (21) united by an optical coupler (50) so as to form a reference arm (30) and a measurement arm (40) terminating in a sensor (41). The arms (30) and (40) are constituted by one and the same optical fiber whose diopter of its free end (31) acts as a partially transparent mirror for the reference optical wave. This end (31) is coupled to the sensor (41) which returns the measurement optical wave through said diopter. Application in particular in the measurement of temperatures, for example in turbo-machines or of fluctuations of flow density.

REFERENCES:
patent: 4596466 (1986-06-01), Ulrich
patent: 4627728 (1986-12-01), Willson
patent: 4755668 (1988-07-01), Davis
"Passive Multiplexing System for Fiber Optic Sensors", Nelson et al., Applied Optics, 9-1980, pp. 2917-2920.

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