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High-power and high optical conversion efficiency diode-end-pumped laser with multi-segmented Nd:YAG/Nd:YVO_4
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A novel flat-flat resonator consisting of two crystals(Nd:YAG + Nd:YVO_4) is established for power scaling in a diode-end-pumped solid-state laser. We systematically compare laser characteristics between multi-segmented(Nd:YAG + Nd:YVO_4) and conventional composite(Nd:YAG + Nd:YAG) crystals to demonstrate the feasibility of spectral line matching for output power scale-up in end-pumped lasers. A maximum continuous-wave output power of 79.2 W is reported at 1064 nm, with M_x~2= 4.82, M_y~2= 5.48, and a pumping power of 136 W in the multi-segmented crystals(Nd:YAG + Nd:YVO_4). Compared to conventional composite crystals(Nd:YAG + Nd:YAG), the optical-optical conversion efficiency of multi-segmented crystals(Nd:YAG + Nd:YVO4) from 808 nm to 1064 nm is enhanced from 30% to 58.8%,while the laser output sensitivity as affected by the diode-laser temperature is reduced from 55% to 9%. 相似文献
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激光晶体由于吸收了一部分泵浦光能量,产生的热量引起晶体内温度不均匀分布,使晶体内的折射率产生不均匀分布,对振荡光产生相应的相位调制,引起振荡光光场再分布,进而导致振荡光模式发生变化。谐振腔具有滤波作用,谐振腔会过滤掉振荡光中与谐振腔不匹配的模式,引起损耗,用MATLAB模拟晶体内温度场分布,通过计算谐振腔内基模的热致损耗及低阶模转换到高阶模的比例,并研究谐振腔中各阶模式的转换问题,为抑制高阶模并减小损耗提供理论依据。 相似文献
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