News wire article from our research archive:

Canadian Inventor Develops Semiconductor Laser with Optical Cavities

ALEXANDRIA, Va., June 14 -- Jian-Jun He of Ottawa has developed an optical waveguide element.

According to the U.S. Patent & Trademark Office: "A semiconductor laser comprises two optical cavities, each comprising an optical waveguide bounded by two partially reflecting elements. The two optical waveguides are disposed on a substrate to form a substantially V-shaped geometry with substantially no cross-coupling at the open end and a predetermined cross-coupling at the closed end for achieving an optimal single-mode selectivity of the laser. The first cavity has a length such that its resonant wavelengths correspond to a set of discrete operating channels."

An abstract of the invention, ...

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