设计了中心波长在825 nm、有效带宽在600 nm～1100 nm的超宽带啁啾镜对, 色散补偿量目标值为-100 fs2。配对设计的啁啾镜对有效抑制了单个啁啾镜的色散振荡, 啁啾镜对色散振荡幅度的最大值为±50 fs2, 用设计制作的啁啾镜对进行色散补偿, 用频率分辨光学开关测量装置对脉冲进行测量。将10.3 fs的超短脉冲通过0.5 mm厚的LBO晶体, 色散效应导致脉冲展宽, 半峰值处的全宽度为39.6 fs, 实验结果表明, 经过啁啾镜对一次色散补偿后的脉冲形状, 半峰值处得全宽度为11.6 fs; 脉冲经过2次补偿后, 脉冲被压缩到10.7 fs。

A chirped dielectric multilayer mirror pair with controlled dispersion in the wavelength range 600 nm~1100 nm with 825 nm centre wavelength was designed and fabricated. The group delay dispersion of the mirror pair is about -100 fs2. The reflectivity of the mirror is >99% and the theoretical group delay dispersion ripple is less than ±50 fs2 in the working spectral range. The mirror pair was used to compensate the 10.3 fs ultra-short pulse passed through 0.5 mm lithium triborate (LBO) crystal and the frequency-resolved optical gating technique was used to measure pulse,then the 10.3 fs pulse was broadened to 39.6 fs due to the dispersion of LBO crystal.Experimental results show that the full width at half summit is 11.6fs after one bounce dispersion compensation of the chirped mirror pair;and the broaden pulse is compressed to 10.7 fs by using two bounces dispersion compensation.