Lin Yu-Chieh, Midorikawa Katsumi, Nabekawa Yasuo
Opt Express. 2022 Mar 28;30(7):10818-10832. doi: 10.1364/OE.447820.
We demonstrate the scanning and control of the carrier-envelope phases (CEPs) of two adjacent spectral components totally spanning more than one-octave in the short-wave infrared (SWIR) wavelength region by operating two individual acousto-optic programmable dispersive filters (AOPDFs) applied to each of the two spectral components. The total CEP shift of the synthesized sub-cycle pulse composed of the two spectral components is controlled with simultaneous scans of the two CEPs. The resultant error of the controlled CEP was 642 mrad, so that this technique is useful for searching zero CEP of the synthesized pulse with the maximum field amplitude. In addition, we conduct a closed feedback loop to compensate for the CEP fluctuation by using the two AOPDFs together. As a result, we succeed to reduce the rms error of the CEP from 399 mrad to 237 mrad.
我们通过操作分别应用于两个光谱分量的两个独立声光可编程色散滤波器（AOPDF），展示了在短波红外（SWIR）波长区域对两个相邻光谱分量的载波包络相位（CEP）进行扫描和控制，这两个光谱分量的总跨度超过一个倍频程。通过同时扫描两个CEP，控制由这两个光谱分量组成的合成子周期脉冲的总CEP偏移。控制后的CEP的最终误差为642毫弧度，因此该技术对于搜索具有最大场振幅的合成脉冲的零CEP很有用。此外，我们通过一起使用两个AOPDF进行闭合反馈回路，以补偿CEP波动。结果，我们成功地将CEP的均方根误差从399毫弧度降低到237毫弧度。
