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高峰值功率的超短脉冲激光器在激光精细微加工等领域具有重要应用价值。以超大模场光纤为增益介质对超短脉冲激光进行功率放大,是实现高光束质量、高峰值功率超短脉冲激光输出的有效技术手段。以脉冲宽度、重复频率可调的1030nm锁模光纤激光器为种子光源,通过多级全光纤功率预放大和以超大模场棒状光子晶体光纤(PCF)为增益介质的功率放大器,搭建了高峰值功率皮秒脉冲光子晶体光纤放大器系统。实验研究了棒状PCF放大器的输出特性,在脉冲宽度为30ps时实现了峰值功率为2.94 MW的近衍射极限激光放大输出。
The ultra-short pulse laser with high peak power has important application value in the field of laser micro-machining. To super-mode-mode fiber gain medium for the ultra-short pulse laser power amplifier is to achieve high beam quality, high peak power ultra-short pulse laser output of effective technical means. A 1030nm mode-locked fiber laser with adjustable pulse width and repetition frequency is used as the seed light source. The power amplifier with multi-stage all-fiber power pre-amplification and gain medium with super-mode-field rod photonic crystal fiber (PCF) Picosecond pulsed photonic crystal fiber amplifier system. Experimental study of the output characteristics of the rod-shaped PCF amplifier, the peak power of 2.94 MW near-diffraction limit laser amplification output at a pulse width of 30ps.