论文部分内容阅读
分析计算了利用棱镜组引进频谱空间啁啾来补偿谐波倍频晶体的相位失配 .结果表明 ,光谱存在空间啁啾时 ,选择合适的透镜可在一定程度上补偿由于飞秒光脉冲的宽谱带引起的相位失配 .采用此方法在实验上用自制的飞秒自锁模钛宝石激光器和BBO倍频晶体进行了二次谐波倍频的研究 ,结果产生倍频蓝光的转换效率高达 6 3 % ,蓝光平均输出功率达 32 0mW ,中心波长为 42 0nm ,光谱带宽达 5 .5nm ,可支持 33.6fs的光脉冲 .利用钛宝石激光器中的棱镜对进行波长调谐 ,可使蓝光脉冲产生 40 4— 42 0nm的调谐范围 .
The phase space mismatch of the harmonics is compensated by introducing the spectral space chirp through the prism group. The results show that when there is spatial chirp in the spectrum, choosing a suitable lens can compensate for the wide The phase mismatch caused by the band.This method has been used in the experiment with a self-made self-locking femtosecond mode-locked Ti: sapphire laser BBO octave harmonic frequency harmonic analysis of the second harmonic frequency doubling produce blue light conversion efficiency of up to 6 3%, blue light average output power of 32 0mW, the center wavelength of 42 0nm, spectral bandwidth of 5.5nm, can support 33.6fs pulse of light. The use of titanium sapphire laser prism for wavelength tuning, blue light pulse can be generated 40 4-42 0nm tuning range.