Multi-stripe array grating integrated cavity laser
AssigneeBell Communications Research, Inc.
InventorsKai R. Poguntke, Julian B. D. Soole
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Abstract
An integrated, multi-wavelength laser having formed on a substrate (12) a plurality of active, individually selectable waveguides (14), a passive output waveguide (16), and a diffraction grating (18) formed in a Rowland-circle spectrometer geometry. The frequency of the lasing light is determined by-the geometrical relationship of the selected active waveguide, the diffraction grating, and the output waveguide. The active waveguides are positioned such that lasing light cannot diffract between two active waveguides. Little crosstalk occurs because no carrier depletion occurs in the output waveguide.
Claims10
A multi-wavelength laser comprising
- a substrate;
- a plurality of individually activable laser waveguides formed on said substrate;
- a single passive output waveguide formed on said substrate;
- and
- a diffraction grating formed on said substrate and operatively linking said laser waveguides and said single passive output waveguide, each laser waveguide, said grating, and said single passive output waveguide comprising a lasing optical resonant cavity whereby lasing wavelengths of said laser waveguides are determined by a geometrical relationship of said laser waveguides, said single passive output waveguide, and said diffraction grating.
A multi-wavelength laser comprising
- a substrate;
- a plurality of individual activable laser waveguides formed on said substrate;
- a single passive output waveguide formed on said substrate;
- and
- a diffraction grating formed on said substrate and operatively linking said laser waveguides and said single passive output waveguide, each laser waveguide, said grating, and said single passive output waveguide comprising a lasing optical resonant cavity whereby lasing wavelengths of said laser waveguides are determined by a geometrical relationship of said laser waveguides, said single passive output waveguide, and said diffraction grating, and
- wherein output ends of said laser waveguides, an input end of said single passive output waveguide, and said diffraction grating are disposed in a Rowland-circle geometry.
Dependencies are inferred from the claim text.