Fiber coupler temperature transducer

Details Fiber coupler temperature transducer Fiber coupler temperature transducer

1981-09-10

1984-07-31

Yasich, Daniel M.

Thermal measuring and testing

Temperature measurement

In spaced noncontact relationship to specimen

350 9615, 350 9621, 356 43, 374159, G01J 508, G02B 5172

Patent

active

044626991

ABSTRACT:
A transducer for the measurement of temperature incorporates a fiber optic coupler having a coupling efficiency which varies in relation to the index of refraction of a thin layer of index matching liquid, such as index matching oil, placed between the optical fibers of the coupler. Since the index of refraction of the liquid varies predictably with temperature, the coupling efficiency of the transducer may be used to directly measure the temperature of the coupler and its surroundings.

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Publ.: "Single-Mode Fiber Optic Directional Coupler", Bergh et al., pp. 260-261, Electronics Letters, Mar. 27, 1980, vol. 16, No. 7.
Nakagome Patent Abstracts of Japan, vol. 2, #125, published Oct. 20, 1978, p. 7467 E 78.
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