全固态kHz啁啾脉冲飞秒激光放大器
kHz pulse-pumped Ti:sapphire regenerative amplifier
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摘要: 要建造大功率超强激光系统，必须将nJ量级的种子进行放大，以得到mJ量级以及更高能量的激光输出。为达到这个目的，必须使种子能量指数增加，再生腔放大器是实现这一目的的良好途径；同时，为了得到更稳定的激光输出，须采用高重复频率的泵浦源。为此，设计了一种kHz重复频率激光泵浦的再生放大器，使用15 mJ的527 nm的绿光泵浦，得到了约2.3 mJ的800 nm放大激光输出，同时，对其输出激光的光谱特性进行了测量，将带宽为40 nm的种子注入后，得到了光谱带宽约为30 nm激光输出。Abstract: In order to get ultra-short intensity laser pulses, it is necessary to amplify the laser pulses from nJ level to mJ level. The regenerativeamplifier is the best way to get high-energy laser pulse. It can amplify the seed from nJ level to mJ level quickly. And the output laser has a good spatial mode. A Ti:sapphire regenerative amplifier was designed in this paper.Otherwise, in order to make the output laser stable, a 1 kHz 527 nm green laser was used as the pump laser in the experiment. Using such a Ti:sapphire regenerative amplifier, a 12 nJ seed which was generated from a self mode-locking Ti:sapphire oscillator was amplified to energy of 2.3 mJ in a pulse at 1 kHz. The spectrum of the amplifier was also measured. When the 40 nm seed was injected into the cavity, a laser output of about
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Key words:
- femtosecond laser /
- cpa /
- regenerative amplifier
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