Gain and line width in stimulated Brillouin scattering in gases
Gain and line width in stimulated Brillouin scattering in gases
复制标题
气体中受激布里渊散射的增益和线宽
DOI：
10.1070/qe1972v002n01abeh003536
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发表时间：
1972
期刊：
影响因子：
--
通讯作者：
F. Faǐzullov
中科院分区：
文献类型：
--
作者：
V. Kovalev;V. Popovichev;V. V. Ragul'skii;F. Faǐzullov
CH4、N2、Xe 和 SF6 的受激布里渊散射阈值和超声速度通过实验确定。两个光电管记录了充气比色皿入口处激光束的瞬时功率以及间隙传输的光束的瞬时功率。来自这些光电管的信号被施加到阴极射线管的水平和垂直偏转系统。以这种方式获得的波形图用于确定受激布里渊散射的阈值。将不同气体的阈值功率与105 atm压力下甲烷的相应值进行比较，并从理论上计算增益。超音速的速度是根据激发辐射谱和散射辐射谱之间的频移推导出来的。测量结果用于计算线宽和增益。
The thresholds of stimulated Brillouin scattering and the velocities of hypersound were determined experimentally for CH4, N2, Xe, and SF6. The instantaneous powers of a laser beam at the entry to a gas-filled cuvette and of the beam transmitted by the gap were recorded by two photocells. The signals from these photocells were applied to the horizontal and vertical deflection systems of a cathode-ray tube. Oscillograms obtained in this way were used to determine the threshold of stimulated Brillouin scattering. The threshold powers for different gases were compared with the corresponding value for methane at a pressure of 105 atm, for which the gain was calculated theoretically. The velocity of hypersound was deduced from the frequency shift between the spectra of the exciting and scattered radiation. The results of the measurements were used to calculate the linewidths and gains.