Title :
High-Efficient and Reliable Broad-Area Laser Diodes With a Window Structure
Author :
Morita, Takahito ; Nagakura, Toshiaki ; Torii, Kentaro ; Takauji, Motoki ; Maeda, Jukai ; Miyamoto, Masayuki ; Miyajima, Hiroki ; Yoshida, Hiroyuki
Author_Institution :
Hamamatsu Photonics K.K., Hamamatsu, Japan
Abstract :
We report on high-power 915-nm broad-area laser diodes with a window structure formed by a impurity-free vacancy disordering method. A maximum conversion efficiency of 68% and high output power of 19.8 W have been achieved at 20°C. A stable operation over 2000 h has also been confirmed under the condition of an output power of 15 W at 25°C. Far-field patterns suggest that the laser diode is suitable for coupling into an optical fiber with 105-μm core diameter and 0.15 numerical aperture.
Keywords :
optical fibre couplers; optical windows; semiconductor lasers; vacancies (crystal); far-field patterns; high-power broad-area laser diodes; impurity-free vacancy disordering; optical fiber coupling; power 15 W; size 105 mum; size 915 nm; temperature 20 degC; temperature 25 degC; window structure; Diode lasers; Fiber lasers; Optical fiber devices; Photonics; Power generation; Reliability; Semiconductor lasers; Fiber lasers; power lasers; pump lasers; reliability; semiconductor lasers;
Journal_Title :
Selected Topics in Quantum Electronics, IEEE Journal of
DOI :
10.1109/JSTQE.2013.2245103
