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1984年FOrk等人提出的四棱镜组可以产生正负可调的群速色散，用来补偿自相位调制所产生的惆嗽，使得它在超短脉冲振荡器和放大器中均得到十分广泛的应用．现在自锁模掺钛蓝宝石激光器中，用石英棱镜组和啁啾镜联合进行色散补偿，已获得6．5fs的光脉冲．最近又有压缩至4．6fs的?
In 1984, the quadratic prism set proposed by FOrk et al. Can produce positive and negative tunable group velocity dispersion to compensate for cough caused by self-phase modulation, making it very widely used in ultra-short pulse oscillators and amplifiers . Now self-mode-locked titanium-doped sapphire laser, using a combination of quartz prism and chirped mirror dispersion compensation, has been 6.5fs optical pulse. Recently compressed to 4.6fs?