应用拉曼光谱法对氘气在不同条件下的谱峰信噪比进行了实验研究。 采用32 mW功率的Ar+激光器(514 nm), 通过石英玻璃管, 研究了光栅、 激光功率、 曝光时间和气体压强对氘气拉曼谱图信噪比的影响, 得出了氘气拉曼光谱信噪比与激光功率、 曝光时间和气体压强呈正比关系。 绘制出适用于本套实验仪器的不同压力与信噪比的标准曲线, 并用三组随机样品对关系式SNR(J 2→2)=10.6×10-4p+1.271 34进行验证。 当氘气压强为21 280 Pa时, 相对误差是4.8%, 并且当压强增大到67 235 Pa时, 相对误差下降到1.46%。

Raman spectroscopy was used for experimental research on D2 signal to noise ratio(SNR) under different conditions. The 32 mW Ar+ laser was injected into the Raman quartz glass cells to study the effect of grating, laser power, exposure time and the gas pressure on D2 Raman spectra SNR. D2 Raman spectral signal to noise ratio is proportional to the laser power, exposure time and gas pressure. The standard curve of the pressure and SNR for this experimental apparatus was obtained. Three sets of random samples were used to verify the formula SNR(J 2→2)=10.6×10-4p+1.271 34. When the deuterium pressure is 21 280 Pa, the relative error is 4.8%. When the pressure increases to 67 235 Pa, the relative error is down to 1.46%.