System comprising optical semiconductor waveguide device

Details System comprising optical semiconductor waveguide device System comprising optical semiconductor waveguide device

H - Electricity

01

S

H01S 5/14 (2006.01) G02B 6/12 (2006.01) H04B 10/12 (2006.01) H01S 5/062 (2006.01) H01S 5/10 (2006.01)

Patent

CA 2344956

An improved optical communication system is provided, the system particularly suited for so-called short-haul applications, e.g., applications involving transmission over distances less than 100 km, such as metro applications. The system uses an external cavity laser made up of a gain medium that comprises an active region, a beam expanding region, and an antireflective layer, an optical waveguide located adjacent the gain medium, and a Bragg grating integral with or coupled to the optical waveguide. The medium and the optical waveguide, due to the beam expanding region, exhibit a coupling efficiency of at least 40%, advantageously at least 50%, even in the absence of coupling optics, and the laser is configured and operated to emit at least two modes.

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