High-resolution laser spectroscopy based on polarisation-modulated optical phase conjugation in a demountable cathode discharge
High-resolution laser spectroscopy based on polarisation-modulated optical phase conjugation in a demountable cathode discharge
复制标题
基于可拆卸阴极放电中偏振调制光学相位共轭的高分辨率激光光谱
DOI：
10.1039/ja9880300531
复制
发表时间：
1988
影响因子：
3.4
通讯作者：
W. Tong
中科院分区：
文献类型：
--
作者：
Dennis A. Chen;W. Tong
基于可拆卸空心阴极放电的偏振调制光学相位共轭的无多普勒激光光谱学是一种灵敏的分析方法，因为它是以可见的相干激光束作为信号产生的。由于共轭信号光束是探测光束的时间反转复制品，因此可以方便而高效地检测光信号。光谱分辨率很好，因为多普勒和洛伦兹展宽都可以忽略不计。利用位相共轭波前的偏振特性，我们在这种光谱方法中展示了一种新的偏振调制检测方案，该方案使用了相对低功率的连续波激光器和钠3S2S1/2到3P2P3/2跃迁的超精细结构。讨论了偏振调制简并四波混频的一些优点。
Doppler-free laser spectroscopy based on polarisation-modulated optical phase conjugation in a demountable hollow-cathode discharge is a sensitive analytical method, as a visible coherent laser beam is generated as the signal. Because the conjugate signal beam is a time-reversed replica of the probe beam, the optical signal can be detected conveniently and efficiently. Spectral resolution is excellent as both Doppler and Lorentzian broadenings are negligible. Taking advantage of the polarisation properties of the phase-conjugate wavefront, we demonstrate a novel polarisation-modulated detection scheme in this spectroscopic method using a relatively low-power continuous-wave laser and the hyperfine structure of the sodium 3s 2S1/2 to 3p 2P3/2 transition. Some advantages of the polarisation-modulated degenerate four-wave mixing are discussed.