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Two-photon-absorption of frequency converter crystals at 248 nm

机译:频率为248 nm的变频器晶体的双光子吸收

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The two-photon-absorption coefficient of KDP, BBO, LTB, and CLBO crystals has been determined from the measurement of the intensity dependent transmission through long samples. The intensity of the sub-picosecond KrF excimer laser pulses on the samples was varied from 0.2-80 GW/cm~2. The linear absorption of the samples was determined by using a low intensity, long pulse KrF laser. The first-principle simulations to the experimental data show a TPA value of 0.48 cm/GW for KDP, 0.5 cm/GW (o-ray) and 0.34 cm/GW (e-ray) in BBO, 0.22 cm/GW in LTB and 0.53 cm/GW in CLBO.
机译:KDP,BBO,LTB和CLBO晶体的双光子吸收系数已根据通过长样品的强度相关传输的测量值确定。皮秒级KrF准分子激光脉冲的强度在0.2-80 GW / cm〜2之间变化。通过使用低强度,长脉冲KrF激光确定样品的线性吸收。对实验数据的第一原理模拟显示,对于KDP,TPB值为0.48 cm / GW,在BBO中为0.5 cm / GW(o射线),在0.34 cm / GW(e射线)中,LTB和TPA值为0.22 cm / GW。在CLBO中为0.53 cm / GW。

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