300 W linearly polarized femtosecond all-fiber chirped pulse amplification system
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摘要: 报道了高平均功率的线偏振啁啾脉冲放大系统。该系统包括全光纤结构的多级放大器以及透射光栅脉冲压缩器。压缩前, 实现了近衍射极限光束输出, 平均功率425 W, 光光效率81%, 消光比约13 dB；压缩后, 获得了平均功率300 W、脉宽315 fs、峰值功率12 MW的激光脉冲, 为目前报道的最高平均功率的线偏振光纤啁啾脉冲放大系统。Abstract: A high average power linearly polarized chirped pulse amplification (CPA) system is reported, which comprises of a fully fiberized fiber amplifier chain and a transmission grating pulse compressor. Before compression, the output average power of 425 W is achieved with corresponding optical to optical efficiency of 81%, polarization extinction ratio of 13 dB and near-transform-limited beam quality. After compression, femtosecond pulses with average power of 300 W, duration of 315 fs and peak power of 12 MW are achieved. This is the highest average power ever reported in linearly polarized fiber CPA system.
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Key words:
- fiber laser /
- linear polarization /
- chirped pulse amplification /
- femtosecond pulses
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