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1. (WO2015122367) INTEGRATED SEMICONDUCTOR LASER ELEMENT AND SEMICONDUCTOR LASER MODULE

Pub. No.:    WO/2015/122367    International Application No.:    PCT/JP2015/053366
Publication Date: Aug 20, 2015 International Filing Date: Feb 6, 2015
IPC: H01S 5/026
H01S 5/12
H01S 5/125
H01S 5/343
H01S 5/50
Applicants: FURUKAWA ELECTRIC CO., LTD.
古河電気工業株式会社
Inventors: KIYOTA, Kazuaki
清田 和明
KOBAYASHI, Go
小林 剛
Title: INTEGRATED SEMICONDUCTOR LASER ELEMENT AND SEMICONDUCTOR LASER MODULE
Abstract:
An integrated semiconductor laser element which is obtained by integrating, on a substrate, a semiconductor laser and a semiconductor optical amplifier that amplifies output laser light of the semiconductor laser, and which is characterized in that: the semiconductor laser comprises a first active layer; the semiconductor optical amplifier comprises a second active layer; the first active layer and the second active layer have a multiple quantum well structure; and the second active layer has more number of quantum wells than the first active layer. Consequently, there can be achieved: an integrated semiconductor laser element which has output laser light having a narrow spectral line width and a high intensity; and a semiconductor laser module.