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设计了中心波长800 nm带宽约500 nm的啁啾镜对,在550—1050 nm波长范围内提供约60 fs2群延迟色散(group delay dispersion,GDD),通过啁啾镜对的形式使GDD振荡波纹由单个啁啾镜的±100 fs2减小到±20 fs2.采用双射频离子束溅射方法进行制备,用白光干涉仪进行色散性能测试,从测试结果可以看出,制备的啁啾镜的反射率、GDD性能和设计值符合得比较好.制备出的550—1050 nm超宽带啁啾镜对在钛宝石激光器腔外进行色散补偿,原输入脉冲由24—27 fs压缩到12 fs,这是国产超宽带啁啾镜对的首次应用.
A chirped mirror pair with a center wavelength of 800 nm and a wavelength of about 500 nm was designed to provide a group delay dispersion (GDD) of about 60 fs2 in the wavelength range of 550-1050 nm. The GDD oscillation wave From a single chirped mirror ± 100 fs2 reduced to ± 20 fs2 using dual radio frequency ion beam sputtering method for the preparation of white light interferometer for dispersion performance test can be seen from the test results of the reflection of the chirped mirror GDD performance and design values are in good agreement.Prepared 550-1050 nm ultra-wideband chirped mirrors are used to compensate the dispersion of Ti: sapphire laser cavity with the original input pulse compressed from 24-27 fs to 12 fs, which is The first application of domestic ultra-wideband chirped mirror pair.