Laser analytical spectrometry based on optical phase conjugation by degenerate four-wave mixing in a flowing liquid analyte cell.

Laser analytical spectrometry based on optical phase conjugation by degenerate four-wave mixing in a flowing liquid analyte cell.
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基于流动液体分析池中简并四波混合的光相位共轭的激光分析光谱测定。

DOI:
10.1021/ac00184a016
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发表时间:
1989
影响因子:
7.4
通讯作者:
Tong,WG
Tong,WG
中科院分区:
化学1区
文献类型:
--
作者:
Wu,ZQ;Tong,WG

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简并四波混频(D4 WM)是在非线性介质(1-10)中产生光学相位共轭的最常用技术之一。D4 WM方法利用两个精确反向传播的前向泵浦Ef和后向泵浦Ej光束。探测光束Ep在与前向泵浦光束相同的方向上传播,并以小角度与泵浦光束相交。相位共轭信号光束可以非常有效地提取,因为整个信号是会聚光束的形式,因为它是探测光束的波前反转的复制品。D4 WM的光场耦合可用三阶非线性系数3来描述。最近,我们报道了在低压空心阴极放电等离子体中通过共振D4 WM实现的光学相位共轭,以及使用相对低功率的连续波环形染料激光器实现的具有优异检测灵敏度的分析火焰(11,12)。我们还展示了有效的信号-
Degenerate four-wave mixing (D4WM) is one of themost versatile techniques for the generation of optical phase con-jugation in a nonlinear medium (1-10). The D4WM method utilizes two exactly counterpropagating forward pump, Ef, and backward pump, Ej,, beams. A probe beam, Ep, propagates in the same direction as the forward pump beam and intersects the pump beams by a small angle. The phase conjugate signal beam can be extracted very efficiently because the entire signal is in the form of a converging beam since it is a wavefront-reversed replicaof the probe beam. The opticalfield coupling of D4WM is described by the third-order nonlinear suscep-tibility 3. Recently, we reported optical phase conjugation by resonant D4WM in a low-pressure hollow cathode discharge plasma and an analytical flame with excellent detection sen-sitivity using a relatively low-power continuous-wave ring dye laser (11, 12). We have also demonstrated effective signal-
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