【摘要】 利用连续波掺Yb双包层光纤激光器为泵浦源 ,对单模石英光纤中受激Raman散射谱的形成过程进行了实验研究 结果表明 ,由自发Raman散射向受激Raman散射演化的过程中Stokes谱宽度不断变窄 当Stokes波信号功率较强时 ,在Raman光谱内部会出现能量红移现象 ,使Stokes光谱峰值相对于泵浦波的频移量从 4 4 0cm-1转化到 4 90cm-1更多还原

【Abstract】 Formation process of the SRS spectrum pumped by CW Yb-doped double clad fiber laser in single-mode silica fiber is studied experimentally. Results show that the spectral width of the Stokes wave narrows gradually as the spectrum builds up from spontaneous Raman scatter to stimulated Raman scatter. When the power of the Stokes wave grows high enough, energy red-shift within the Stokes spectrum will happen and makes the frequency shift between the spectral peak of the Stokes wave and the pump wave increases from 440cm-1 to 490 cm -1.更多还原