Star coupler including waveguides having different radius of cur

Details Star coupler including waveguides having different radius of cur Star coupler including waveguides having different radius of cur

1993-02-09

1996-01-23

Lee, John D.

Optical waveguides

With optical coupler

Particular coupling structure

385 28, 385 44, 385 45, G02B 628

Patent

active

054871220

ABSTRACT:
A first terminal is connected to a second terminal by means of a first waveguide having a first radius of curvature. The first terminal (or second terminal) is connected to a third terminal by means of a second waveguide (or a third waveguide) having a second radius of curvature which is grater than the first radius of curvature. Incident light supplied from the first terminal is branched between the first waveguide and the second waveguide, and the light entering the first waveguide undergoes the greater attenuation since this waveguide has the smaller radius of curvature. Hence, the light component passing through the first waveguide has a difference in output from the component passing through the second waveguide that is sufficiently great to provide a large branching ratio.

REFERENCES:
patent: 4760580 (1988-07-01), Thompson et al.
patent: 4989937 (1991-02-01), Mahlein et al.
patent: 5093876 (1992-03-01), Henry et al.
patent: 5109448 (1992-04-01), Coden et al.
patent: 5282257 (1994-01-01), Ota
patent: 5343545 (1994-08-01), Ota et al.
"Fibernet: Multimode Optical Fibers for Local Computer Networks", E. G. Rawson et al., IEEE Transactions on Communications, vol. COM-26, No. 7, pp. 983-990, (1978) (no month).

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