Multiple quantum well distributed feedback semiconductor laser d

Details Multiple quantum well distributed feedback semiconductor laser d Multiple quantum well distributed feedback semiconductor laser d

1995-03-08

1997-03-25

Kunemund, Robert

Fishing, trapping, and vermin destroying

437 89, 148DIG95, H01S 308

Patent

active

056144369

ABSTRACT:
A distributed feedback semiconductor laser device having a semiconductor substrate, a bottom electrode formed on a bottom surface of the substrate, a corrugation-shaped grating formed on a top surface of the substrate, an active waveguide layer whose energy band gap profile and whose light propagation constant are varied along cavity length direction of the laser device, the active waveguide layer being formed over the corrugation-shaped grating, a clad layer formed to cover the active waveguide layer, and a top electrode formed on a top of the clad layer. The active waveguide layer is grown by a selective metal organic vapor phase epitaxy with use of slender insulation masks having a variation in width, the slender insulation masks being arranged at both sides of an area on which the active waveguide layer is grown.

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