报道了在10 Hz飞秒再生放大超快激光系统中,运用可编程声光色散滤波器(AOPDF)对注入再生放大的种子光进行频谱整形和色散预补偿,使钛宝石激光系统输出光脉冲谱线半峰全宽由原来的38 nm展宽到66 nm,压缩后输出脉冲宽度从35 fs减小到20 fs。实验结果表明,利用可编程声光色散滤波器能够同时独立进行光谱整形和大范围内色散补偿的特性,可以有效抑制啁啾脉冲放大过程中存在的谱线增益窄化效应,补偿钛宝石激光系统中存在的残留色散。这为进一步研制小于20 fs, 10 TW量级钛宝石激光系统奠定了基础。

The spectrum width is expanded from 38 nm to 66 nm, and the output laser pulse is consequently squeezed from 35 fs to 20 fs in the 10 Hz femtosecond regenerative amplifier, with an acoustic-optic programmable dispersive filter(AOPDF) for dispersion pre-compensation and spectrum shaping of the input seed pulses. The experimental results show that the AOPDF can make spectrum shaping and dispersion compensation in a large range simultaneously and independently, depress effectively the spectrum gain narrowing in the chirped pulse amplification and compensate the residual dispersion in the Ti∶sapphire laser system. The result paves the way for the development for 20 fs, 10 TW Ti∶sapphire laser.