对交叉偏振波滤波技术理论分析的基础上,在“极光-Ⅲ”装置中采用该技术进行了钛宝石飞秒放大激光脉冲对比度提高的实验研究,不仅显著的抑制了纳秒范围内再生放大器产生的预脉冲,而且也将皮秒范围内的信噪比由10-5提高到了10-7,实验测得基波到交叉偏振波的转化效率大于10%.研究表明,该技术可以有效地提高飞秒超强激光的信噪比。 Based on the theoretical analysis of the cross-polarization filter technology, the experimental study on the enhancement of the contrast of the laser pulse with the Ti: Sapphire femtosecond magnification in the “Aurora-III” device not only significantly inhibits the regeneration in nanosecond range Amplifier, but also increased the signal-to-noise ratio in the picosecond range from 10-5 to 10-7, and the experimentally measured fundamental-to-cross-polarization conversion efficiency was> 10% .Research shows that this technique can be effective Improve the signal to noise ratio of the super femtosecond laser.