摘要
一个单个模式的硅石纤维习惯于散布的刺激拉曼(SRS ) 的温度特征的学习，另外的山峰(双 humped ) 在泵光和 1 <SUP 的双方被观察 > st </SUP>-order 司烧在实验的光。双 humped 的频率移动被刺激四个光子混合计算(SFPM ) 分阶段执行匹配的理论，结果与这个实验的频率移动一致。同时，试验性的条件与有效连贯长度的理论计算一致。我们显示双 humped 现象被 SFPM 引起。当温度增加，双 humped 的紧张首先被增加，然后减少了并且最后消失了。这现象理论上被解释了。
One piece of single-mode silica fibre is used to study of temperature characteristics of stimulated Raman scattering （SRS）, additional peaks （double-humped） are observed at both sides of pump light and 1 St-order Stokes light in the experiment. The frequency shift of the double-humped is calculated by stimulated Four-Photon mixing （SFPM） phase matching theory, the result is consistent with the frequency shift of this experiment. Simultaneously, the experimental conditions accord with the theoretical calculation of effective coherence length. We indicate that the double-bumped phenomenon is caused by SFPM. The intensity of double-humped is first increased, then decreased and finally disappeared as the temperature increases. This phenomenon has been explained theoretically.
基金
Supported by the National Natural Science Foundation of China under Grant No 10774057.
关键词
喇曼散射
温度条件
单一模式
二氧化硅
纤维
the power-law exponents, precipitation, durative, abrupt precipitation change
