Buried twin ridge substrate laser

Details Buried twin ridge substrate laser Buried twin ridge substrate laser

1986-10-24

1988-05-17

Davie, James W.

Coherent light generators

Particular active media

Semiconductor

372 46, 357 17, H01S 319

Patent

active

047456116

ABSTRACT:
A BTRS (buried Twin-Ridge Substrate) structure laser, wherein an oblong protrusion (10) is provided on a substrate (1) of a first conductivity type and two ridges (9, 9) divided by a groove (31) therebetween are provided on a second layer (2) of a second conductivity type, and thereon plural layers (3, 4, 5, 6) including an active layer (4) are provided is improved to have longer service life such that: the protrusion (10) is shortened so as to have its both ends apart inside cavity facet of the substrate (1), or further by width of each ridge (9, 9) is narrowed at both ends thereof thereby forming narrowed end parts (9', 9'), so that excessive current injection to the active layer near the cavity facet is eliminated.

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