A new method to determine the absolute mode number of a mode-locked femtosecond-laser comb used for absolute optical frequency measurements
A new method to determine the absolute mode number of a mode-locked femtosecond-laser comb used for absolute optical frequency measurements
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DOI：
10.1109/jstqe.2003.819102
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发表时间：
2003-12
影响因子：
4.9
通讯作者：
Longsheng Ma;M. Zucco;S. Picard;L. Robertsson;R. Windeler
中科院分区：
文献类型：
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作者：
Longsheng Ma;M. Zucco;S. Picard;L. Robertsson;R. Windeler
光学频率梳的产生直接以SI秒为基准，可用于测量光学频率。这为仪表的实现提供了一种最好的方法。然而，这种测量通常需要辐射频率的近似知识，以便确定所使用的梳状分量的整数阶。这种信息通常是通过研究中的辐射的先前波长测量获得的。本文提出了一种利用锁模飞秒激光器确定光学频率测量中绝对模数的新方法，从而消除了互补波长测量的需要。作为例子，给出了碘稳定的/SPL波长为633 nm的He-Ne激光器和/SPL波长为532 nm的Nd：YAG激光器的频率测量结果。
The generation of optical frequency combs, directly referenced to the SI second, can be used to make measurements of optical frequencies. This provides a supreme method for the realization of the meter. However, an approximate knowledge of the frequency of the radiation is normally needed for such measurements in order to determine the integral order of the comb component used. Such information is usually obtained by prior wavelength measurements of the radiation under study. This paper demonstrates a new method to determine the absolute mode number in optical frequency measurements using mode-locked femtosecond lasers, thus eliminating the need for complementary wavelength measurements. Measurements of the frequency of an iodine-stabilized He-Ne laser at /spl lambda/=633 nm and a Nd:YAG laser at /spl lambda/=532nm are given as examples.