多波段紫外太瓦级CPA系统
Multi-wavelength ultraviolet terawatt-order CPA system
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摘要: 基于啁啾脉冲放大(CPA)技术和频率变换技术,构建了一个多波长紫外太瓦量级CPA系统.该系统实现了5种频率的精确同步,可同时输出1Hz,5Hz和10Hz的高能量多波段紫外脉冲.时间抖动小于3ns的时间同步系统和能量不稳定性小于0.5%rms的kHz预放大系统保证了CPA系统输出的能量不稳定性小于2%rms.最后,通过共线相位匹配方案,得到了64mJ/400nm,16mJ/267nm和5mJ/205nm紫外脉冲输出,对应峰值功率达到太瓦量级.Abstract: We set up a multi-wavelength ultraviolet terawatt-order chirped pulse amplification(CPA) system according to the CPA technology and the frequency conversion technology.The system offers 1Hz,5Hz and 10Hz high energy ultraviolet pulses by precise time synchronization among 5 repeat frequencies.The RMS of output energy fluctuation rate of CPA is less than 2% with using a pre-amplified system of energy fluctuation rate less than 0.3% RMS and a time synchronizer with time jitter less than 3 ns.The multi-wavelength high energy ultraviolet pulses with 64 mJ/400 nm,16 mJ/267 nm and 5 mJ/205 nm are obtained,and their corresponding peak powers reach the terawatt level.
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