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对中国计量科学研究院研制的第一代基于钛宝石飞秒激光器的光学频率梳系统进行了改进和优化.通过对激光器重复频率、光谱展宽以及拍频信号探测等方面的改进,有效地降低了光谱展宽的复杂性,提高了飞秒光学频率梳系统的稳定性和激光频率测量的便捷性.采用该光学频率梳系统对碘稳频532nm和碘稳频633nm激光绝对频率进行了测量,测量结果在国际推荐值的不确定度范围之内.
The first generation of optical frequency comb system based on Ti: FeSb laser developed by China Metrology Institute was improved and optimized. By improving laser repetition frequency, spectral broadening and beat signal detection, The complexity of spectral broadening improves the stability of femtosecond optical frequency combing system and the convenience of laser frequency measurement.The absolute frequency of iodine frequency stabilization 532nm and iodine frequency stabilization 633nm laser are measured by this optical frequency comb system.The measurement results Within the scope of the uncertainty of the international recommendations.