Huang Yao-Chin, Chen Hsuan-Chen, Chen Shih-En, Shy Jow-Tsong, Wang Li-Bang
Department of Physics and Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu, Taiwan.
Appl Opt. 2013 Mar 1;52(7):1448-52. doi: 10.1364/AO.52.001448.
We report absolute frequency measurements on the a(1), a(10), and a(15) hyperfine components of the R(78) 4-6 line of (127)I(2). An external-cavity diode laser system at 671 nm is frequency-stabilized to the saturated absorption center obtained by modulation transfer spectroscopy in an iodine vapor cell. Its absolute frequency is measured by an optical frequency comb. The effect of pressure shift is investigated to obtain the absolute transition frequency at zero pressure. Our determination of the line centers reaches a precision of better than 40 kHz and will provide useful input for theoretical calculations. This frequency-stabilized laser can be used as a reference laser for the spectroscopy of lithium D lines.
我们报告了对(127)I(2)的R(78) 4 - 6线的a(1)、a(10)和a(15)超精细成分的绝对频率测量。一个671 nm的外腔二极管激光系统通过碘蒸气池中调制转移光谱获得的饱和吸收中心进行频率稳定。其绝对频率由光学频率梳测量。研究了压力频移的影响，以获得零压力下的绝对跃迁频率。我们对线中心的测定精度优于40 kHz，将为理论计算提供有用的输入。这种频率稳定的激光可作为锂D线光谱学的参考激光。
