Patent
1974-09-03
1976-05-18
Rubin, David H.
350 96WG, G02B 514
Patent
active
039573419
ABSTRACT:
A passive frequency-selective optical coupler comprises first and second dielectric waveguides disposed in proximate (preferably parallel) spatial disposition relative to each other. A phase propagation constant at a known frequency is common to guided modes of both dielectric waveguides while the phase propagation constants of the guided modes at all other frequencies are different. The portion of the waveguides which are arranged in proximate spatial disposition extends over a sufficient length for selectively coupling light energy between the two dielectric waveguides at the known frequency only, without coupling a significant amount of light energy at any other frequencies. Signal transmission in the form of light energy may therefore be multiplexed for transmission along one of the dielectric waveguides, with selective coupling of only the known predetermined frequency to the other dielectric waveguide at that portion where the waveguides are arranged in proximate spatial disposition relative to each other.
REFERENCES:
patent: 3589794 (1971-06-01), Marcatili
patent: 3785717 (1974-01-01), Croset et al.
patent: 3820871 (1974-06-01), Croset et al.
Marcatili, Article in The Bell System Technical Journal Sept. 1969, pp. 2-2102.
Taylor, Article in Journal of Applied Physics July 1973, pp. 3257-3262.
McLaren J. W.
Rubens G. J.
Rubin David H.
Sciascia R. S.
The United States of America as represented by the Secretary of
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