Stable isotope ratio analysis at trace concentrations using degenerate four-wave mixing with a circularly polarized pulsed probe beam.
Stable isotope ratio analysis at trace concentrations using degenerate four-wave mixing with a circularly polarized pulsed probe beam.
复制标题
使用简并四波混合与圆偏振脉冲探测光束进行痕量浓度的稳定同位素比分析。
DOI：
10.1021/ac00009a012
复制
发表时间：
1991
影响因子：
7.4
通讯作者：
Tong,WG
中科院分区：
文献类型：
--
作者：
Wu,ZQ;Tong,WG
通过使用具有垂直偏振泵浦光束和圆偏振探测光束的 D4WM 方法，报告了基于谐振简并四波混频 (D4WM) 的矢量光相位共轭的稳定同位素分析。由于信号光束的偏振与泵浦光束的偏振不同，因此可以更有效地抑制背景辐射。出色的灵敏度、高光谱分辨率和高效的光学检测使其成为分析痕量稳定同位素的有效且异常方便的非线性光谱方法。使用前聚泵浦脉冲染料激光器来检查锂的精细结构。通过使用基于瞬态“相干光栅”的 D4WM 光谱，观察到 2.5 ng/mL 锂的检测限，同时保持无多普勒分辨率。
Stable Isotope analysis based on vectorial optical-phase conjugation by resonant degenerate four-wave mixing (D4WM) Is reported by using a D4WM method withvertically polarized pump beams and a circularly polarized probe beam. Since the polarization of the signal beam Is different from that of the pump beams, the background radiation Is suppressed more effectively. Excellent sensitivity, high spectral resolution, and efficient optical detection make this an effective and unusually convenient nonlinear spectrometrlc method for the analysis of trace amounts of stable Isotopes. Using an ex-clmer-pumped pulsed dye laser, the fine structures of lithium are examined. A detection limit of 2.5 ng/mL lithium Is observed while a Doppler-free resolution Is maintained by using transient “coherent-grating" based D4WM spectroscopy.