Guided wave optical switch based on an active semiconductor...

H - Electricity – 01 – S

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H01S 5/026 (2006.01) G02B 6/12 (2006.01) G02F 1/225 (2006.01) H01S 5/50 (2006.01) H01S 5/10 (2006.01) H01S 5/40 (2006.01)

Patent

CA 2399712

A guided wave optical switch having a passive optical component optically coupled to a low gain optical amplifier - both being formed monolithically in a semiconductor substrate. The passive optical component may comprise a single- mode -3 dB optical power splitter that receives at an input an optical signal and splits that optical signal approximately equally between two outputs. The passive optical component may also comprise an optical isolator, an optical circulator, and other known passive optical devices. The low gain optical amplifier includes a waveguide having an active region that may provide optical signal gain when excited by an electrical current provided by a metal or metallic electrode connected to the active region. The active region may be a bulk active region, a multiple quantum well active region, or the waveguide may comprise a buried heterojunction waveguide having either a bulk or multiple quantum well active region.

L'invention porte sur un commutateur optique à ondes guidées comportant un composant optique passif optiquement couplé à un amplificateur optique à faible gain, tous deux étant formés comme monolithes dans un substrat semi-conducteur. Le composant optique passif, qui peut comporter un diviseur de puissance monomode de 3dB recevant à une entrée un signal optique et le divisant en deux signaux de sortie sensiblement égaux, peut en outre comporter un isolateur optique, un circulateur optique et d'autres dispositifs optiques passifs connus. L'amplificateur optique à faible gain comporte un guide d'ondes présentant une zone active assurant un gain de signal optique lorsqu'excitée par un courant électrique provenant d'un métal ou d'une électrode métallique lui étant reliée, ladite zone active pouvant être du type massivement active ou à puits quantiques multiples. Le guide d'ondes peut par ailleurs être du type à hétérojonction enfouie et à zone active massivement active ou à puits quantiques multiples.

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