Frequency selective optical coupler

Details Frequency selective optical coupler Frequency selective optical coupler

1974-12-12

1976-02-03

Corbin, John K.

350 96WG, G02B 514

Patent

active

039361446

ABSTRACT:
Coextensive first and second optical waveguides are disposed with substantially uniform periodic variations in spatial separation including repetitive sections of close proximity which will permit optical coupling therebetween. The first optical waveguide has a different optical length (i.e., different light energy propagation characteristics) than the second optical waveguide. Due to the different effective optical lengths of the two waveguides between contiguous sections of close proximity where optical coupling may take place, light energy of a determinable frequency propagated along one of the waveguides is substantially all coupled into the other optical waveguide in the course of propagating along a determinable number of the repetitive sections; light energy of all other frequencies is effectively phase cancelled and thus inhibited from being coupled between the two optical waveguides.

REFERENCES:
patent: 3208342 (1965-09-01), Nethercot, Jr.
patent: 3408131 (1968-10-01), Kapany
patent: 3558213 (1971-01-01), Marcatili
patent: 3850503 (1974-11-01), Riseberg et al.
W. E. Martin et al., "Optical Waveguides by diffusion in II-VI compounds," pplied Physics Letters, Vol. 21, No. 7, Oct. 1972, pp. 325-327.

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