Electrooptic polarization multiplexer/demultiplexer

Details Electrooptic polarization multiplexer/demultiplexer Electrooptic polarization multiplexer/demultiplexer

1984-05-29

1987-12-08

Lee, John

350 9613, G02B 610

Patent

active

047115157

ABSTRACT:
An electrooptic polarization multiplexer/demultiplexer incorporates an electrooptic, directional coupler switch structure. The multiplexer/demultiplexer includes a substrate of birefringent, electrooptic material, a pair of phase matched, dielectric waveguides embedded in the substrate and spaced closely together over a distance L (the coupler or device length), a buffer layer of insulating material positioned over the substrate and the pair of electrodes, and a plurality of metallic electrodes positioned on the buffer layer in the vicinity of the waveguides. Electrodes are arranged in a multi-section, reversed .DELTA..beta. configuration. The distance L is selected such that 1.ltoreq.L/1.sub.TE .ltoreq.2 and L/1.sub.TM .ltoreq.0.5, where 1.sub.TE and 1.sub.TM are transfer lengths for the TE and TM modes, respectively.

REFERENCES:
patent: 4243295 (1981-01-01), Alferness
patent: 4262993 (1981-04-01), Burns et al.
patent: 4390236 (1983-09-01), Alferness
"Switched Directional Couplers . . . ", by H. Kogelnik, et al., pp. 396-401, IEEE J. Quantum Elec., vol. QE-12 (1976).
"Precise Determination of Refractive-Index . . . ", by Minakata, et al., pp. 4677-4682, J. Apl. Phys., 49(9), Sep. 1978.
"LiNbO.sub.3 Coupled-Waveguided . . . ", by Mikami, pp. 491-493, Appl. Phys. Lett., 36(7), Apr. (1980).
"Guided-Wave Devices for . . . ", by Alferness, pp. 946-959, IEEE J. Quant. Elec., vol. QE-17 (1981).
"Efficient Optical Waveguide . . . ", by Schmidt, pp. 45-47, Optical Society of America, (1978).

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