High-Efficiency Continuous-Wave Operation of Blue-Green Laser Diodes Based on Nonpolarm-Plane Gallium Nitride

2008 ◽  
Vol 1 ◽  
pp. 072201 ◽  
Author(s):  
Kuniyoshi Okamoto ◽  
Taketoshi Tanaka ◽  
Masashi Kubota
1994 ◽  
Vol 30 (7) ◽  
pp. 568-570 ◽  
Author(s):  
N. Nakayama ◽  
M. Ozawa ◽  
T. Ohata ◽  
A. Ishibashi ◽  
S. Itoh ◽  
...  

2012 ◽  
Vol 5 (6) ◽  
pp. 062101 ◽  
Author(s):  
Sumiko Fujisaki ◽  
Jun-ichi Kasai ◽  
Ryouichi Akimoto ◽  
Shigehisa Tanaka ◽  
Shinji Tsuji ◽  
...  

2007 ◽  
Vol 1 (1) ◽  
pp. 011102 ◽  
Author(s):  
Masashi Kubota ◽  
Kuniyoshi Okamoto ◽  
Taketoshi Tanaka ◽  
Hiroaki Ohta

2010 ◽  
Vol 3 (9) ◽  
pp. 091201 ◽  
Author(s):  
Jun-ichi Kasai ◽  
Ryouichi Akimoto ◽  
Haruhiko Kuwatsuka ◽  
Toshifumi Hasama ◽  
Hiroshi Ishikawa ◽  
...  

2003 ◽  
Vol 39 (10) ◽  
pp. 777 ◽  
Author(s):  
D. Gollub ◽  
S. Moses ◽  
M. Fischer ◽  
A. Forchel

2008 ◽  
Vol 2008 ◽  
pp. 1-4 ◽  
Author(s):  
Shaowei Chu ◽  
Ying Zhang ◽  
Bin Wang ◽  
Yong Bi

908 mW of green light at 532 nm were generated by intracavity quasiphase matching in a bulk periodically poled MgO:LiNbO3 (PPMgLN) crystal. A maximum optical-to-optical conversion efficiency of 33.5% was obtained from a 0.5 mm thick, 10 mm long, and 5 mol% MgO:LiNbO3 crystal with an end-pump power of 2.7 W at 808 nm. The temperature bandwidth between the intracavity and single-pass frequency doubling was found to be different for the PPMgLN. Reliability and stability of the green laser were evaluated. It was found that for continuous operation of 100 hours, the output stability was better than 97.5% and no optical damage was observed.


1997 ◽  
Vol 482 ◽  
Author(s):  
Shuji Nakamura

AbstractInGaN multi-quantum-well (MQW) structure laser diodes with A10.14Ga0.86N/GaN modulation doped strained-layer superlattice cladding layers grown on an epitaxially laterally overgrown GaN substrate were demonstrated to have an estimated lifetime of more than 10,000 hours under continuous-wave operation at 20°C. Under operation at a high temperature of 50°C, the lifetime was longer than 1,000 hours. The activation energy of the lifetime was estimated to be 0.5 eV. With the operating current increasing above the threshold, a self-pulsation with a high frequency of 3.5 GHz was observed. The relative intensity noise (RIN) less than -145 dB/Hz was obtained even at the 6% optical feedback using the high-frequency modulation of 600 MHz. The threshold carrier density of the InGaN MQW-structure LDs was estimated to be 3 × 1019/cm3 using a carrier lifetime of 1.8 ns.


Author(s):  
Yoshitaka Nakatsu ◽  
Yoji Nagao ◽  
Kazuma Kozuru ◽  
Tsuyoshi Hirao ◽  
Eiichiro Okahisa ◽  
...  

2011 ◽  
Vol 4 (8) ◽  
pp. 082102 ◽  
Author(s):  
Jun-ichi Kasai ◽  
Ryouichi Akimoto ◽  
Toshifumi Hasama ◽  
Hiroshi Ishikawa ◽  
Sumiko Fujisaki ◽  
...  

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