论文标题
H13C14N的绝对频率在1,5μm区域中具有饱和光谱和亚kHz扫描激光的1,5μm区域的绝对频率
Absolute frequencies of H13C14N hydrogen cyanide transitions in 1,5 μm region with saturated spectroscopy and sub-kHz scanning laser
论文作者
论文摘要
其旋转光谱中的宽跨度和高密度使氰化氢成为有用的光谱介质，用于参考光学通信和尺寸计量学中激光的绝对频率。据我们所知，我们首次确定了H13C14N同位素的分子过渡中心频率在1526 nm至1566 nm的范围内，其分数不确定性为1,3E-10。我们用高度连贯且可调的扫描激光研究了分子跃迁，该激光器通过光频率梳精确地指代氢mas。我们展示了一种稳定维持氰化氢不断低压的操作条件的方法，以使用第三谐波同步解调进行饱和光谱。与先前的结果相比，我们证明了线中心的分辨率大约有四十倍改善。
The wide span and high density of lines in its rovibrational spectrum render hydrogen cyanide a useful spectroscopic media for referencing absolute frequencies of lasers in optical communication and dimensional metrology. We determined, for the first time to the best of our knowledge, the molecular transitions' center frequencies of the H13C14N isotope in the range from 1526 nm to 1566 nm with 1,3e-10 fractional uncertainty. We investigated the molecular transitions with a highly coherent and widely tunable scanning laser that was precisely referenced to a Hydrogen maser through an optical frequency comb. We demonstrated an approach to stabilize the operational conditions needed to maintain the constantly low pressure of the hydrogen cyanide to carry out the saturated spectroscopy with the third-harmonic synchronous demodulation. We demonstrated approximately a fourtyfold improvement in the line centers' resolution compared to the previous result.
