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首页> 外文会议>Conference on Laser Frequency Stabilization, Standards, Measurement, and Applications Jan 24-26, 2001, San Jose, USA >Frequency reproducibility of I_2-stabilized Nd:YAG lasers
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Frequency reproducibility of I_2-stabilized Nd:YAG lasers

机译：稳定I_2的Nd：YAG激光器的频率再现性

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摘要

We have established four I_2-stabilized Nd: YAG lasers to verify the frequency reproducibility of the lasers. The observed square root Allan variance of the four lasers was between 1 approx 4 X 10~(-14) depending on the obtained signal-to-noise ratio of the spectra, when the integration time is larger than 300 s. The observed frequency reproducibility of each laser was ranged from 9.1 X 10~(-14) ~ 1.5 X 10~(-13) (corresponding to frequency uncertainties of +- 51approx 87 Hz). Frequency reproducibility of a group of lasers (four NRLM lasers) has been evaluated to be 8.2 X 10~(-13) (corresponding to a frequency uncertainty of +- 640 Hz). One of the four NRLM lasers is a compact I_2-stabilized Nd: YAG laser which is suitable to be transported to other laboratories for international frequency comparisons. Using this portable laser, we have accomplished frequency comparisons of Nd:YAG lasers between several metrological institutes in different countries. The absolute optical frequencies of the NRLM lasers were determined with an uncertainty of about 1.5 kHz by the frequency comparison between the NRLM and the JILA (formerly the Joint Institute for Laboratory of Astrophysics), Boulder, CO.
机译：我们已经建立了四个I_2稳定Nd：YAG激光器，以验证激光器的频率再现性。当积分时间大于300 s时，根据所获得的光谱信噪比，观察到的四个激光的平方根艾伦方差在1约4 X 10〜（-14）之间。观察到的每个激光器的频率再现性在9.1 X 10〜（-14）〜1.5 X 10〜（-13）的范围内（对应于±51的约87 Hz的频率不确定性）。一组激光器（四个NRLM激光器）的频率再现性已评估为8.2 X 10〜（-13）（对应于+-640 Hz的频率不确定性）。四个NRLM激光器之一是紧凑的I_2稳定Nd：YAG激光器，适合运输到其他实验室进行国际频率比较。使用这种便携式激光器，我们已经完成了不同国家几家计量机构之间Nd：YAG激光器的频率比较。 NRLM激光的绝对光学频率是通过NRLM和JILA（原名为美国天体物理学联合研究所）之间的频率比较确定的，不确定度约为1.5 kHz。

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