Rank D H, Wick R V, Wiggins T A
Physics Department, The Pennsylvania State University, University Park, Pennsylvania, USA.
Appl Opt. 1966 Jan 1;5(1):131-3. doi: 10.1364/AO.5.000131.
Stimulated Raman spectra have been excited in liquid SnCl(4) and in methane gas making use of a medium high-power ruby laser. The spectra have been photographed by means of a high-resolution grating spectrograph. The Deltagamma value approximately nu(1) for methane was found to be 2916.605 cm(-1) +/- 0.012 cm(-1). No detectable pressure shift was observed over a range of gas densities from 3 amagat to 12 amagat. The stimulated Raman lines in methane are very sharp and only slightly broader than the laser line. In SnCl4 the first Stokes line consists of only a single component instead of the expected isotopic triplet. The half-intensity width of this line was found to be 0.5 cm(-1). At least 0.15 cm(-1) of this line-width must be due to the stimulated Brillouin doublet since the threshold is lower for the stimulated Brillouin effect than for the stimulated Raman effect. The stimulated Brillouin effect was observed with a Fabry-Perot etalon. Measurements of the Fabry-Perot patterns gave a value of 840 m per see for the velocity of sound in SnCl(4) at 27 degrees C.
利用一台中高功率红宝石激光器，在液态四氯化锡和甲烷气体中激发了受激拉曼光谱。这些光谱通过高分辨率光栅摄谱仪进行了拍摄。发现甲烷的Δγ值（约为ν₁）为2916.605厘米⁻¹±0.012厘米⁻¹。在3阿马伽至12阿马伽的气体密度范围内未观察到可检测到的压力位移。甲烷中的受激拉曼线非常尖锐，仅比激光线稍宽。在四氯化锡中，第一条斯托克斯线仅由一个单一成分组成，而不是预期的同位素三重态。发现这条线的半高宽为0.5厘米⁻¹。由于受激布里渊效应的阈值低于受激拉曼效应，这条线宽中至少0.15厘米⁻¹必定归因于受激布里渊双线。用法布里 - 珀罗标准具观察到了受激布里渊效应。对法布里 - 珀罗条纹的测量得出27℃时四氯化锡中声速的值为840米每秒。
