Mulac A J, Flower W L, Hill R A, Aeschliman D P
Appl Opt. 1978 Sep 1;17(17):2695-9. doi: 10.1364/AO.17.002695.
A gated photon counting system, cavity-dumped argon-ion laser, and a multipass retroreflecting light cell have been combined in a system to enhance spontaneous Raman scattering in luminous background situations. Signal-to-background ratio (SBR) has been improved a factor of 450 over a single-pass cw system with cw power equal to the pulsed average power. The improvement attributable to the gating and cavity dumping the laser is a factor of 30. A factor of 15 improvement is due to the retroreflecting light cell. Temperature and density data obtained from N(2)Q-branch spectra of a luminous methane-air flame are presented to illustrate the utility of the system. A passband fitting technique is introduced to analyze the data.
一个门控光子计数系统、腔倒空氩离子激光器和一个多程后向反射光池被组合在一个系统中，以增强发光背景情况下的自发拉曼散射。与连续波功率等于脉冲平均功率的单通连续波系统相比，信背比（SBR）提高了450倍。由于激光的门控和腔倒空，改进因子为30。15倍的改进归因于后向反射光池。给出了从发光甲烷 - 空气火焰的N(2)Q分支光谱获得的温度和密度数据，以说明该系统的实用性。引入了通带拟合技术来分析数据。
