Patent
1979-01-31
1981-02-24
Levy, Stewart J.
350 9615, 350 9619, G02B 514
Patent
active
042524040
ABSTRACT:
Several monochromatic light beams of different wavelengths, modulated with respective message signals, are combined at a transmitting station into a composite beam conveyed via a fiber-optical path to a receiving station where the composite beam is resolved into its constituent beams. The mixing and separation of individual beams takes place with the aid of bodies each consisting of two transparent portions whose refractive indices vary as a function of wavelength along curves of different slope intersecting in a common point; a monochromatic beam whose wavelength corresponds to that point passes undeflected through the boundary of these portions whereas the beam or beams of larger wavelength, for which the complement of the critical angle of incidence equals or exceeds the glancing angle, are internally reflected to fall into line with the undeflected beam upon mixing and to deviate therefrom upon separation.
REFERENCES:
patent: 3244075 (1966-04-01), Richards et al.
patent: 3874779 (1975-04-01), Thiel
patent: 3977764 (1976-08-01), d'Auria et al.
B. E. Kincaid, "Fiber optic data distribution system utilizing . . . ", Applied Optics vol. 16, No. 9, Sep. 1977, pp. 2355-2356.
R. J. Lynch, "Fiber Optic Connectors", IBM Technical Disclosure Bulletin vol. 13, No. 2, Jul. 1970, pp. 533-534.
CSELT - Centro Studi e Laboratori Telecomunicazioni S.P.A.
Levy Stewart J.
Ross Karl F.
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