Optical switch and method for producing the optical switch

Details Optical switch and method for producing the optical switch Optical switch and method for producing the optical switch

1994-01-28

1995-09-19

Healy, Brian

Optical waveguides

With optical coupler

Switch

385 17, 385 18, 385 14, 385 39, 385 40, 385131, 385132, 257 15, 257 16, 437 51, 437110, G02B 610, H01L 2712, H01L 2170

Patent

active

054523834

ABSTRACT:
An optical switch includes a semiconductor substrate having a surface, a ridge waveguide disposed on the surface of the semiconductor substrate and including an optical waveguide layer having an MQW structure, first and second cladding layers sandwiching the optical waveguide layer, and a switch disposed in a part of the ridge waveguide. A part of the MQW optical waveguide layer included in the switch is thicker than the other part of the optical waveguide layer, whereby the energy band gap of the optical waveguide layer of the switch is smaller than the energy band gap of the other part of the optical waveguide layer and larger than the energy of the signal light. Therefore, the absorption loss of the signal light traveling through the optical waveguide layer is reduced. Furthermore, since the variation in the refractive index of the switch when current is applied to the switch is increased, the ON/OFF ratio of the switch is increased.

REFERENCES:
patent: 4840446 (1989-06-01), Nakamura et al.
patent: 4861130 (1989-08-01), Katsuyama et al.
patent: 4923264 (1990-05-01), Langer et al.
patent: 5044745 (1991-09-01), Inoue et al.
patent: 5091980 (1992-02-01), Ogawa et al.
patent: 5247592 (1993-09-01), Inoue et al.
patent: 5306924 (1994-04-01), Usami et al.
patent: 5339370 (1994-08-01), Sano et al.
Inoue et al, "Carrier-Injection Type Optical S.sup.3 Switch With Traveling-Wave Amplifier", IEEE Photonics Technology Letters, vol. 2, No. 3, Mar. 1990, pp. 214-215.
Inoue et al, "An 8mm Length Nonblocking 4.times.4 Optical Switch Array", IEEE Journal on Selected Areas in Communications, vol. 6, No. 7, Aug. 1988, pp. 1262-1266.

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