Integrated optical star coupler

Details Integrated optical star coupler Integrated optical star coupler

1982-09-13

1985-05-07

Sikes, William L.

350 9615, 350 9616, G02B 5174

Patent

active

045154287

ABSTRACT:
A single-mode integrated optical star coupler employing weighted directional coupling between pairs of non-parallel waveguides formed on a substrate. Light launched into an input waveguide is split into desired, and usually equal-power proportions among a plurality of output waveguides, without the use of conventional Y-section branches and with a minimum of waveguide bends. At each non-parallel coupling point, light in a first waveguide is coupled, to a predetermined degree, into a second waveguide with one end in a close, non-parallel relationship with the first waveguide. In one embodiment, the output waveguides are all coupled to the input waveguide in this manner. In other embodiments, the input waveguide power is first split between two principal output waveguides, and other output waveguides are coupled to the principal output waveguides.

REFERENCES:
patent: 3977762 (1976-08-01), Sandbank
patent: 4116530 (1978-09-01), Bellavance et al.
patent: 4165225 (1979-08-01), Auracher et al.
patent: 4262995 (1981-04-01), Tangonan
patent: 4278321 (1981-07-01), Mack et al.
Findakly et al., Appl. Phys. Lett., vol. 40, No. 7, 1 Apr. 1982, "Single-Mode Integrated Optical 1xN Star Coupler", pp. 549-550.
Somekh et al., Appl. Phys. Lett. vol. 22, No. 2, 15 Jan. 1973, "Channel Optical Warguide Directional Couplers", pp. 46-47.

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