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传统532nm波长碘稳频固体激光频标装置虽然能达到很高的频率稳定度和不确定度,但装置比较庞大,不便搬运。而对于一些对激光频率稳定度要求不高的实际应用,如绝对重力仪等,缩小装置的体积以易于搬运,成为更为关注的因素。建立一套小型化532nm固体激光器,该系统体积小巧,易于搬运。通过与原有碘稳频532nm固体激光标准装置的进行拍频测量实验,得到1s的阿伦偏差为2.4×10-12,并计算得到该激光器的频率绝对值为563260223436kHz,对应的频率不确定度为52kHz(包含因子k=2)。该系统已被用于中国计量科学研究院的绝对重力仪中。
The traditional 532nm wavelength iodine frequency stabilization solid-state laser frequency standard device can achieve high frequency stability and uncertainty, but the device is relatively large, inconvenient to carry. However, for some practical applications that have low requirements on the stability of the laser frequency, such as absolute gravimeter, it is more of a concern to reduce the volume of the device for easy handling. Build a compact 532nm solid-state laser that is compact and easy to handle. Through the beat frequency measurement experiment with the original iodine frequency stabilized 532nm solid laser standard device, the Allan deviation of 1s is 2.4 × 10-12, and the absolute value of the laser frequency is 563260223436kHz, the corresponding frequency uncertainty Is 52kHz (including the factor k = 2). The system has been used in the China Institute of Metrology Absolute Gravimeter.