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Evaluating the safe limit of large-aperture potassium dihydrogen phosphate crystals associated with transverse stimulated Raman scattering

机译:评估与横向受激拉曼散射有关的大孔径磷酸二氢钾晶体的安全极限

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We propose a process to evaluate the safe limit of large-aperture DKDP crystals associated with transverse stimulated Raman scattering (TSRS) at the wavelength of 351 nm. The DKDP crystals' safety can be assured by controlling the intensity of TSRS-scattering light to the same order of that of Rayleigh-scattering light. We use an optical fiber sensor system to detect side-scattering light in the DKDP and compare the intensity between Raman-and Rayleigh-scattering light. By defining the threshold intensity as a condition in which the intensity ratio between transverse Raman-scattering light and Rayleigh-scattering light exceeds 1, we obtain the threshold intensity of approximately 2.6 GW/cm(2) in our experiment. This method enables us to determine the TSRS threshold directly instead of measuring the TSRS gain coefficient and edge reflectivity of the crystals. (C) 2015 Optical Society of America
机译:我们提出了一种评估与351 nm波长的横向受激拉曼散射(TSRS)相关的大孔径DKDP晶体的安全极限的方法。通过将TSRS散射光的强度控制在与Rayleigh散射光的强度相同的数量级,可以确保DKDP晶体的安全性。我们使用光纤传感器系统检测DKDP中的侧向散射光,并比较拉曼散射和瑞利散射光之间的强度。通过将阈值强度定义为横向拉曼散射光与瑞利散射光之间的强度比超过1的条件,我们在实验中获得的阈值强度约为2.6 GW / cm(2)。这种方法使我们能够直接确定TSRS阈值,而不用测量晶体的TSRS增益系数和边缘反射率。 (C)2015年美国眼镜学会

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