摘要
用10 m长单模石英光纤进行受激拉曼散射温度特性研究,实验中发现在泵浦光和一级Stokes左右出现了附加峰(称为双峰),其峰强度随温度的升高(80～295 K)呈现先增加后减弱现象。当温度达到295 K时,一级Stokes双峰消失。由受激四光子混频理论计算可知,这种双峰现象是受激四光子混频的结果。同时对SRS一级Stokes所产生的受激四光子混频的Stokes频移随温度升高由706.9 cm-1增大到712.9 cm-1和其半宽度由1.75 nm增至2.18 nm的现象也进行了解释。
Ten meter single mode silica fiber was used to study the temperature characteristics of stimulated Raman scattering （SRS）, and additional peaks （double-humped structure） were observed at both sides of pump light and first-order Stokes light in the experiment. The peak intensity increased first, and then decreased as the temperature increased from 80 K to 295 K. The first-order Stokes double-humped wave peaks disappeared when the temperature was 295 K. The double-humped peaks phenomenon was caused by simulated four photon mixing （SFPM）, according to stimulated four-photon mixing theoretical calculation. At the same time, the phenomenon that the frequency shift of first-order Stokes spectrum line in SRS increased from 706.9 to 712.9 cm ^-1 and its half width increased from 1.75 to 2.18 nm was theoretically explained, and the theoretical results are well consistent with experiments.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2009年第6期1566-1569,共4页
Spectroscopy and Spectral Analysis
基金
国家自然科学基金项目(10774057)资助
关键词
单模石英光纤
受激拉曼散射
受激四光子混频
双峰
Single mode silica fiber
Stimulated Raman scattering
Stimulated four-photon mixing
Double-hump
