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报道了一种基于全啁啾镜腔内色散补偿的、可长期稳定运行的亚8 fs钛宝石激光器.在4 W绿光抽运下,可获得300 mW、86 MHz脉冲输出.腔内用于色散补偿的两对啁啾镜是国内自主设计自行镀膜的,其对色散的精确控制可以在腔内不加尖劈对的情况下获得半宽超过150 nm超宽带输出.利用腔外色散补偿,脉冲宽度被压缩至7.9 fs,这是目前采用国产啁啾镜获得的最短脉宽,也是无尖劈对谐振腔获得的最短脉宽.同时,利用电路系统提供实时反馈调节,可保证钛宝石激光器长期稳定运行,24 h内功率抖动约0.6%.
A sub-8 fs Ti: sapphire laser based on full-chirped intracavity dispersion compensation for long-term stability is reported. A 300 mW, 86 MHz pulse output is obtained at 4 W green-light pumping. Chromatic dispersion compensation of the two pairs of chirped mirror is the domestic self-designed coating, the precise control of dispersion in the cavity without wedge pairs obtained over half the width of more than 150 nm ultra-wideband output. The use of extra-cavity dispersion compensation, The pulse width is compressed to 7.9 fs, which is the shortest pulse width currently obtained using a domestic chirped mirror and the shortest pulse width obtained for a resonator without a wedge. At the same time, real-time feedback regulation is provided by the circuitry to ensure that the titanium sapphire laser Long-term stable operation, power jitter within about 24% within about 0.6%.