Holographic directional coupler for fiber optic systems

Details Holographic directional coupler for fiber optic systems Holographic directional coupler for fiber optic systems

Filed on

1982-05-06

Date issued

1984-08-14

Examiner

Lee, John D.

Other Related Categories

350 37, 350 9620, G02B 532

Type

Patent

Status

active

Patent number

044653328

Description

ABSTRACT:
A fiber optic directional coupler having a holographic element incorported therein. A single optical signal impinges on the holographic element and is separated into a plurality of individual signals which are coupled to a plurality of individual optical fibers. Only a fraction of the incident electromagnetic radiation incident on the holographic element is transmitted to any one of the plurality of fibers. Reversing the direction of the radiation causes all the energy emanating from the combined plurality of fibers to be coupled to the single receiving fiber.

REFERENCES:
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patent: 3885856 (1975-05-01), Ostrowsky et al.
patent: 4054356 (1977-10-01), Noguchi
patent: 4245884 (1981-01-01), Magura et al.
patent: 4310216 (1982-01-01), Pellaux
patent: 4337993 (1982-07-01), Kompfner
patent: 4387955 (1983-06-01), Ludman et al.
patent: 4392709 (1983-07-01), Horner et al.
patent: 4398792 (1983-08-01), Horner et al.
Nishihara, H. et al., "Holocoupler: A Novel Coupler for Optical Circuits", IEEE Journal of Quantum Electronics, Sep. 1975, pp. 794-796.
Thyagarajan, K. et al., "Efficient Coupling of Incoherent Light into Optical Fibers and Bundles," Applied Optics, vol. 17, No. 15, Aug. 1, 1978, pp. 2416-2419.
Kogelnik, H. et al., "Holographic Thin Film Couplers", The Bell System Technical Journal, vol. 49, No. 7, Sep. 1970, pp. 1602-1603.
Horner, J. et al., "Holographic Optical Element (HOE) for Demultiplexing in Fiber Optic Systems", SPIE, vol. 215, Recent Advances in Holography, May 14, 1980.

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