Optic fiber correlator

Details Optic fiber correlator Optic fiber correlator

1988-07-14

1990-05-22

Sikes, William L.

350 9612, G02B 626, G02B 642

Patent

active

049272233

ABSTRACT:
An optic fiber correlator having a first laser and a second laser emitting with the same frequency and with an amplitude modulated respectively by a first and second signal which are correlated. The correlator also has an optic fiber with its two ends respectively coupled to the two lasers and a length which is at least equal to the length corresponding to the maximum duration of the signals which are to be correlated and the optic fiber has a flattened surface throughout its length. A thin layer of non-centrosymmetrical structure material is applied to the flattened surface throughout the length of the fiber and light emitted by the layer is collected at a frequency which is twice the frequency of the two lasers in order to provide an electric signal which is the function of the intensity of the light and this electric signal expresses the correlation integral of the two correlated signals.

REFERENCES:
patent: 4775214 (1988-10-01), Johnson
patent: 4776660 (1988-10-01), Mahlein et al.
patent: 4824199 (1989-04-01), Ukeu
Applied Physics Letters, vol. 42, No. 7, Apr., 1983, pp. 556-558, American Institute of Physics, New York, U.S.A.; K. P. Jackson et al.
Applied Physics Letters, vol. 36, No. 4, 15 Feb. 1980, pp. 253-255, American Institute of Physics, New York, U.S.A.; R. Normandin et al.

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