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用５ｍｍ的ＫＴＰ（ＫＴｉＯＰＯ４）和ＢＢＯ（β－ＢａＢ２Ｏ４）非线性晶体，对皮秒的ＣＰＭ，Ｎｄ∶ＹＡＧ脉冲激光的腔外倍频效应进行研究，获得倍频能量转换效率分别为４２％和３２％，证明ＫＴＰ倍频效率高于ＢＢＯ，结果与理论分析相符．
The extracavity frequency doubling effects of picosecond CPM and Nd:YAG pulsed lasers were studied by using 5 mm KTP (KTiOPO4) and BBO (β-BaB2O4) nonlinear crystals. The doubling frequency conversion efficiencies were 42% and 32%, respectively %, Proving that the KTP frequency doubling efficiency is higher than that of BBO, and the result is consistent with the theoretical analysis.