中国激光, 2010, 37 (9): 2384, 网络出版: 2010-08-19
高功率脉冲2 μm光纤主振荡功率放大器系统
High Power Pulsed 2 μm Fiber Main-Oscillator Power-Amplifier System
摘要
利用国内生长的Tm:YLF晶体实现了在波长1910 nm处高重复频率、短脉宽激光种子输出。晶体尺寸为1.5 mm×6 mm×20 mm,掺杂原子数分数为2%。在腔长为90 mm条件下,采用不同透射率(T)和曲率半径(R)的输出镜,测得在T=10%,R=250 mm时输出激光的斜率效率最高,为25.6%。利用高功率掺铥光纤放大器,采用激光主振荡功率放大器(MOPA)方式,实现了脉冲激光放大。在抽运功率为100 W,重复频率为500 Hz时,得到峰值功率630 kW,单脉冲能量63 mJ的脉冲输出。
Abstract
High repetition rate short pulsed seed laser output at the wavelength of 1910 nm is achieved by utilizing the home-made Tm-doped YLF(Tm:YLF) crystal.The crystal size is 1.5 nm×6 nm×20 mm,and the doping atom fraction is 2%.With the cavity length of 90 mm,by employing different transmissions (T) and radii (R) of the output mirrors,the highest slop efficiency of 25.6% is obtained with T=10% and R=250 mm.In addition,pulsed laser is amplified based on the main-oscillator power-amplifier (MOPA) system by using high-power Tm-fiber amplifier.With the pump power of 100 W and repetition rate of 500 Hz,the laser output with the peak power of 630 kW and pulse energy of 63 mJ is obtained.
徐林, 唐玉龙, 张帅一, 王明建, 徐剑秋, 杭寅. 高功率脉冲2 μm光纤主振荡功率放大器系统[J]. 中国激光, 2010, 37(9): 2384. Xu Lin, Tang Yulong, Zhang Shuaiyi, Wang Mingjian, Xu Jianqiu, Hang Yin. High Power Pulsed 2 μm Fiber Main-Oscillator Power-Amplifier System[J]. Chinese Journal of Lasers, 2010, 37(9): 2384.