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研究了非共线作用下BBO晶体中的参量特性,结果表明这种参量过程不仅存在着比较宽的光谱带宽和较高的参量增益,而且也能在较宽的范围内满足群速匹配条件.这对于高效率地产生脉宽极短的飞秒参量激光、扩大飞秒激光的调谐范围以及通过参量技术放大飞秒脉冲都具有重要的意义.
The parametric properties of BBO crystals under non-collinearity are studied. The results show that this parameter process not only has a wide spectral bandwidth and high parametric gain, but also satisfies the group velocity matching condition in a wide range. This is of great significance for the efficient generation of femtosecond laser with extremely short pulse width, widening of the tuning range of femtosecond laser and amplification of femtosecond pulse by parametric technique.