采用快速傅里叶变换算法, 数值模拟了双泵浦宽带布里渊吸收谱的受激布里渊散射快光.模拟结果表明信号脉冲的时间提前、衰减和脉冲展宽因子容易受到两个泵浦光的相对频率分离因子、输入泵浦光的功率以及光纤长度的影响.优化设计频率分离因子、输入泵浦光的功率以及光纤长度, 224 ps高斯信号脉冲实现了80 ps的最大提前量和0.87的最小展宽因子.研究结果可以提高光纤通信系统的数据速率, 降低脉冲失真.

Nonlinear optical properties of stimulated Brillouin scattering (SBS) to signal detection in water are analyzed. With the threshold characteristics, SBS only occurs when the high power laser is focused in the SBS cell. When there is an object present in front of the focus, it leads to lower incident intensity and then SBS does not occur. The backward SBS signal depends on the focusing location. The nonlinear optical properties of SBS process in the focusing regime are analyzed theoretically. With the object coming near to the focusing center, the backward Stokes signal rises up from zero to a maximum, and then grows to saturation. The delay time of the echo signal to pump signal can give the object location. In experiment, the peak position of varying rate of energy can give object location.

我们将受激后向布里渊散射和受激后向喇曼散射组合,构成一个级联脉冲宽度压缩器,成功地将1.064 μm、6ns的光脉冲变为630nm、20ps的光脉冲。

通过引入广义自洽条件和受激散射相位共轭镜显含频率的光束变换矩阵,研究了频移对受激散射相位共轭光腔的稳定性与模式特性的影响.