High peak power picosecond hybrid fiber and solid-state amplifier system
High peak power picosecond hybrid fiber and solid-state amplifier system
复制标题
DOI：
10.1002/lapl.201010047
复制
发表时间：
2010-09
影响因子：
1.7
通讯作者：
X. Wushouer;P. Yan;H. Yu;Q. Liu;X. Fu;X. Yan;Minglun Gong
中科院分区：
文献类型：
--
作者：
X. Wushouer;P. Yan;H. Yu;Q. Liu;X. Fu;X. Yan;Minglun Gong
本文报道了高峰值功率皮秒光纤与固体激光混合放大系统。该被动锁模固态种子源产生的平均功率为1.8 W，脉冲宽度为14 ps，重复频率为86 MHz。直接耦合到第一个掺镱偏振光子晶体光纤放大器级。为了避免光纤中的非线性效应，仅将第一级的输出功率放大到24 W，光谱增宽为0.21 nm。为了提高峰值功率，在第二阶段选择了双端泵浦复合Nd:YVO4放大器系统。为了减少严重的热效应，采用热键合复合材料YVO4 - Nd:YVO4 - YVO4棒晶作为增益介质。在混合放大激光系统中获得了峰值功率为40 kW、光束质量M2 < 1.15、光效为42.4%的53 W TEM00模式。该系统允许使用低功率种子源，并证明峰值功率的增加超过了光纤主振荡器功率放大器（MOPA）的限制。
We report the high peak power picosecond hybrid fiber and solid-state laser amplifier system. The passively mode-locked solid-state seed source produced an average power of 1.8 W with pulse width of 14 ps and repetition rate of 86 MHz. It was directly coupled into the first Yb-doped polarized photonic crystal fiber amplifier stage. To avoid the nonlinear effects in fiber, the output power from the first stage was merely amplified to 24 W with the narrow spectra broadening of 0.21 nm. For the improvement of the peak power, the dual-end pumped composite Nd:YVO4 amplifier system has been chosen at the second stage. To reduce the serious thermal effect, the thermally bonded composite YVO4 – Nd:YVO4 – YVO4 rod crystal was used as the gain medium. The 53 W TEM00 mode with the peak power of 40 kW, beam quality of M2 < 1.15, corresponding to the optical-optical efficiency of 42.4% was obtained at the hybrid amplifier laser system. The system allows using a low power seed source and demonstrates an increase in the peak power beyond a fiber master oscillator power amplifier's (MOPA's) limit.