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利用BBO晶体在 4 0 0nm的抽运光与信号光夹角为 3 7°时 ,可同时在可见光范围内很宽的光谱范围里实现相位匹配的特点 ,实现了在可见光范围内具有极宽输出光谱宽度的飞秒光学参量放大器 (OPA)的稳定运转 ,其输出脉冲能量大于 1 5 μJ,转换效率超过 15 % .并且在仅采用啁啾镜作为脉冲压缩器的情况下 ,获得了输出脉冲宽度为 13 5fs的极窄光脉冲 ,其脉冲宽度压缩比高达 2 2倍
The use of BBO crystal at 4 0 0nm pump signal and signal light angle of 3 7 °, at the same time in the visible light spectrum to achieve a wide range of phase matching features to achieve in the visible range has a very wide output Spectral width femtosecond optical parametric amplifier (OPA) operates stably with an output pulse energy of more than 15 μJ and a conversion efficiency of more than 15%. In the case of using only a chirped mirror as a pulse compressor, an output pulse width It is a very narrow pulse of 13 5fs with a pulse width compression ratio of up to 2 2 times