Semiconductor laser array device

Abstract

Abstract PURPOSE:To obtain a stable phase synchronizing oscillation state by a method wherein the oscillation starting current values of the semiconductor laser elements which are positioned closest to a light emitting region among the semiconductor laser elements in nonlight-emitting regions are larger than those of semiconductor laser elements in the light emitting region. CONSTITUTION:A plurality of semiconductor laser elements are formed on a semiconductor substrate 1 with a same interval and, among a plurality of the semiconductor laser elements, a predetermined number of the laser elements in a middle part constitute the light emitting region 5 of a semiconductor laser array device and the semiconductor laser elements provided on both the sides of the light emitting region 5 constitute the non-light-emitting regions of the semiconductor laser array device. In the semiconductor laser array device, at least the semiconductor laser elements which are positioned closest to the light emitting region among the semiconductor laser elements in the non-light-emitting regions are given oscillation starting current values larger than those of the semiconductor laser elements in the light emitting region 5. Therefore, even if a lateral leakage current is induced, the semiconductor laser elements in the non-light-emitting regions do not start the oscillation and only the semiconductor laser elements in the light emitting region 5 are made to oscillate. With this constitution, the oscillation mode of a stable and uniform phase synchronizing state can be obtained.

Inventors

• 👤 Kaneki Matsui
• 👤 Mototaka Tanetani
• 👤 Akihiro Matsumoto
• 👤 Hiroyuki Hosobane

Bibliographic Details