Optical switch

Details Optical switch Optical switch

2007-01-23

2007-01-23

Healy, Brian (Department: 2883)

Optical waveguides

With optical coupler

Switch

C385S017000, C385S018000, C385S019000, C385S020000, C385S021000, C385S022000, C385S023000

Reexamination Certificate

active

11245196

ABSTRACT:
An optical switch has an input port, output ports, optical waveguides whose output path of an optical signal branch into two. A first stage optical switch section is provided in a branching portion of the optical waveguide, which switches a propagating path of an optical signal to a path leading to the desired output port. A subsequent stage optical switch section is provided in a branching portion of the optical waveguide subsequent to the first stage optical switch section, which switches a propagating path of a leakage light, which is leaked from the first stage optical switch section, to a path which does not propagates the leakage light to any of the output ports. The first stage optical switch section and the subsequent stage optical switch section switch a path of an optical signal according to a refractive index change caused by a carrier injection.

REFERENCES:
patent: 2003/0156793 (2003-08-01), Kawamoto et al.
patent: 2004/0131305 (2004-07-01), Fouquet et al.
patent: 6-82847 (1994-03-01), None
patent: 2004-29171 (2004-01-01), None
patent: 2004-29172 (2004-01-01), None
K. Ishida, “InGaAsP/InP optical switches using carrier induced refractive index change”, Appl. Phys. Lett., Jan. 19, 1987, pp. 141-142, vol. 50, No. 3.

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