Total internal reflection-type optical waveguide switch

Details Total internal reflection-type optical waveguide switch Total internal reflection-type optical waveguide switch

1992-10-13

1994-11-29

Lee, John D.

Optical waveguides

With optical coupler

Switch

385 18, G02B 626

Patent

active

053697189

ABSTRACT:
In a total internal reflection-type optical waveguide switch which comprises optical waveguides crossing each other so that a refractive index changing region for developing a reflective surface is formed at a crossing section between the waveguides, the refractive index changing region has a configuration such that the reflective surface constitutes a concave surface recessed with respect to one lateral portion of the crossing section. When the refractive index changing region is not activated, incident light upon the spot corresponding to the reflective surface is insensitive to changes of the refractive index in the refractive index changing region, so that the initial crosstalk level can be lowered.

REFERENCES:
patent: 4746183 (1988-05-01), Soref et al.
patent: 4753505 (1988-06-01), Mikami et al.
patent: 4775207 (1988-10-01), Silberberg
patent: 4795225 (1989-01-01), Sakai et al.
patent: 4832430 (1989-05-01), Tada et al.
patent: 5033811 (1991-07-01), Yanagawa et al.
Applied Physics Letters, vol. 54, No. 2, Jan. 1989, "Carrier-Injection-Type Optical Switch in GaAs With A 1.06-1.55 .mu.m Wavelength Range", F. Ito et al., pp. 134-136.
Patent Abstracts of Japan, vol. 8, No. 121, (P-2787) Jun. 7, 1984 & JP-A-59 028 132 (Tateishi) Feb. 14, 1984.
Patent Abstracts of Japan, vol. 12, No. 214 (P-718) Jun. 18, 1988 & JP-A-63 010 134 (OKI Electric) Jan. 16, 1988.
Patent Abstracts of Japan, vol. 15 No. 207 (P-1207) May 28, 1991 & JP-A-03 055 525 (Furukawa) Mar. 11, 1991.

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