1988-11-18
1989-12-05
Sikes, William L.
350 9612, G02B 610
Patent
active
048848581
ABSTRACT:
In an electro-optic distributed coupler switch having a parallel rib geometry, a coupling enhancement region formed of the same material as the upper cladding layers but of lower step height is located between the ribs. By increasing the electric field strength, the coupling enhancement region enables the coupling length L.sub.c to be reduced.
REFERENCES:
patent: 4693543 (1987-09-01), Matsumura et al.
patent: 4737003 (1988-04-01), Matsumura et al.
patent: 4795225 (1989-01-01), Sakai et al.
M. Fujiwara et al., "Gigahertz-Bandwidth InGaAsP/InP Optical Modulators/Switches with Double-Hetero Waveguides"; Sep. 13th, 1984, Electronics Letters, vol. 20, No. 19, pp. 790-792.
Hiroaki Inour et al., "Switching Characteristics of GaAs Directional Coupler Optical Switches", May 1st, 1986, Applied Optics, vol. 25, pp. 1484-1490.
Amnon Yariv, "Coupled-Mode Theory for Guide-Wave Optics", Sep. 1973, IEEE Journal of Quantum Electronics, pp. 919-933.
Asabayashi Issei
Kawahara Masato
Okayama Hideaki
Ushikubo Takashi
Heartney Phan T.
OKI Electric Industry Co., Ltd.
Sikes William L.
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