Semiconductor laser device and optical disk apparatus using the

Details Semiconductor laser device and optical disk apparatus using the Semiconductor laser device and optical disk apparatus using the

1999-07-08

2000-06-27

Davie, James W.

Coherent light generators

Particular active media

Semiconductor

372 46, H01S 319

Patent

active

060815418

ABSTRACT:
A semiconductor laser device of the present invention includes a substrate 201 made of n-type GaAs, an active layer 204, and a pair of cladding layers sandwiching the active layer 204. The device further includes a spacer layer 205 adjacent to the active layer 204 and a highly doped saturable absorbing layer 206. The carrier life time is shortened by doping the saturable absorbing layer 206 in a high concentration, whereby stable self-sustained pulsation can be obtained. As a result, a semiconductor laser device can be obtained, which has a low relative noise intensity in a wide range of temperatures.

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Office Action for Japanese Patent Application Serial No. 8-529169, dated Sep. 22, 1998.

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