Journal
OPTICS EXPRESS
Volume 21, Issue 3, Pages 3627-3632Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.21.003627
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Funding
- National high technology research and development program of China [2012AA040210]
- key project of science and technology department of Jilin province [20112106]
- Natural Science Foundation of China [61176045, 61234004]
- [2011CJT0003]
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An external cavity structure based on the -1st transmission grating is introduced to spectral beam combining a 970 nm diode laser bar. A CW output power of 50.8 W, an electro-optical conversion efficiency of 45%, a spectral beam combining efficiency of 90.2% and a holistic M-2 value of 10.9 are achieved. This shows a way for a diode laser source with several KW power and diffraction-limited beam quality at the same time. (C) 2013 Optical Society of America
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