Electrically pumped, solid-state distributed feedback laser

Details Electrically pumped, solid-state distributed feedback laser Electrically pumped, solid-state distributed feedback laser

H - Electricity

01

L

345/56

H01L 21/208 (2006.01) H01S 5/12 (2006.01) H01S 5/187 (2006.01)

Patent

CA 1044355

ELECTRICALLY PUMPED, SOLID-STATE DISTRIBUTED FEEDBACK LASER ABSTRACT OF THE INVENTION An electrically pumped, solid-state laser device having a grating or physical periodic structure in a region, or adjacent a region, of semiconductor material that functions as a light wave guide. The spacing of the perturbations of the periodic structure are selected to be an integer number of half wavelengths of the desired laser wavelength. The electrically pumped, solid-state laser device can be a single heterojunction device or a double heterojunction device. Both devices are formed by a process which provides for formation of the periodic structure prior to formation of the light guiding layer or region. Due to this process a periodic structure having a desired spacing and substantial depth is produced, which structure produces Bragg Scattering which couples and reinforces light traveling through the light guiding layer in both directions in a coherent manner such that reflections are in phase, thus allowing laser operation in the absence of discrete end reflectors. - 2 -

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