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用互类匹配ＢＢＯ晶体对近红外波段钛宝石飞秒脉冲激光做倍频实验，取得近３０％的转换效率，对飞秒脉冲激光倍频的有关问题进行了分析讨论．
The frequency doubling experiment of the femtosecond pulsed laser in the near infrared band was performed with the BBO crystal of each other. The conversion efficiency was nearly 30%, and the related problems of the laser frequency doubling of the femtosecond pulse were analyzed and discussed.