Transverse stimulated Raman scattering gain coefficient measurement in KDP crystal
Transverse stimulated Raman scattering gain coefficient measurement in KDP crystal
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DOI：
10.1117/12.2020127
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发表时间：
2013-07
期刊：
影响因子：
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通讯作者：
Yajing Guo;Shunxing Tang;Hongchao Hui;Yuyu Wang;Qing Tang;B. Zhu;Zunqi Lin
中科院分区：
文献类型：
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作者：
Yajing Guo;Shunxing Tang;Hongchao Hui;Yuyu Wang;Qing Tang;B. Zhu;Zunqi Lin
用改进的方法测量了KDP样品的横向受激拉曼散射（TSRS）增益系数。改进包括TSRS的颜色分离、噪声光管理和有效TSRS时间脉冲的获取。在提取TSRS时间脉冲并进行数据分析后，得到KDP样品的TSRS增益系数为0.28±0.03cm/GW。我们对测量方法的改进主要包括以下三个方面：首先，利用光栅的一级衍射实现了TSRS和Rayleigh的分离。其次，为了提高TSRS信号与泵浦光寄生反射引起的噪声光的比值，我们采用带通滤波器和吸收陷阱去除噪声光。第三，通过分析泵浦信号和噪声信号之间的时间延迟，证明了可以从噪声信号中提取有效的TSRS时间脉冲，并利用该时间脉冲计算KDP的TSRS增益系数。
Transverse stimulated Raman scattering (TSRS) gain coefficient of a KDP sample is measured by improved methods. The improvements include color separation of TSRS, noise light management and acquisition of valid TSRS temporal pulse. After extracting TSRS temporal pulse and data analysis, we obtained a TSRS gain coefficient of 0.28±0.03cm/GW for the KDP sample. Our improvements of measurement method include the following three aspects: First, the separation of TSRS irradiation (362.2nm) from Rayleigh irradiation (351.15nm) is realized by first-order diffraction of grating for TSRS and Rayleigh. Second, to improve the ratio of TSRS signal and noise light owing to spurious reflection of pump radiation, we remove noise light by using band-pass filter and absorption traps. Third, by analyzing the time delay between pump signal and noise signal, we demonstrates the valid TSRS temporal pulse can be extracted from the noise signal and used to calculate the TSRS gain coefficient of KDP.