期刊
OPTICS EXPRESS
卷 19, 期 27, 页码 26810-26815出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.19.026810
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资金
- Chinese Academy of Sciences [CXJJ-10-M50]
Energy transfer upconversion induced thermal effects are mainly responsible for the low efficiency of laser diode pumped Er:YAG lasers. The current work adopts Er: YAG rods with 0.25% Er3+ doping concentration, instead of the commonly used rods with 0.5% Er3+ doping concentration. Results show that the thermal effect is greatly alleviated. A continuous-wave output of 10.2 W is obtained using 31 W incident pump power. Optical-optical efficiency is approximately 33%. Slope efficiency, with respect to the absorbed pump power, is as high as 83%, which is close to the quantum efficiency. In a Q-switched operation, 7 mJ pulses with a pulse width of similar to 65 ns are obtained at 100 Hz PRF. (C) 2011 Optical Society of America
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