基于自聚焦透镜耦合光纤取样的高功率激光装置调频脉冲时间波形测量技术

发布时间：2018-03-03 12:37

本文选题：测量　切入点：自聚焦透镜　出处：《中国激光》2017年05期 　论文类型：期刊论文

【摘要】：提出了一种基于自聚焦透镜耦合单模光纤测量调频小宽带脉冲时间波形的技术方案。理论分析和实验结果表明:自聚焦透镜耦合光纤的取样能量随透镜与光束夹角增大而减小,但同一角度下各级次光谱耦合效率一致,取样过程不会引入附加的调频-调幅(FM-AM)效应,耦合效率下降一半时允许的光束角漂量为1mrad。该技术方案除具有便于集成、低成本、抗光束扰动能力和电磁干扰能力强等优点外,还通过自聚焦透镜扩大了取样面积,有效提高了取样能量,并抑制了光束截面能量起伏对测量系统的不良影响。该技术方案为高功率激光装置脉冲波形测量技术的改进研究提供了一定的理论和实验基础。
[Abstract]:In this paper, a technique for measuring frequency modulated small wideband pulse time waveform based on self-focusing lens coupled single-mode fiber is presented. The theoretical analysis and experimental results show that the sampling energy of self-focusing lens coupling fiber decreases with the increase of the angle between the lens and the beam. But the sub-spectral coupling efficiency is the same at the same angle, the sampling process will not introduce the additional FM-AM effect, and the allowable beam angular drift is 1mradwhen the coupling efficiency is reduced by half. The scheme is not only easy to integrate, but also low cost. In addition to the advantages of strong anti-beam disturbance ability and electromagnetic interference ability, the sampling area is enlarged by the self-focusing lens, and the sampling energy is effectively increased. The scheme provides a theoretical and experimental basis for the improvement of pulse waveform measurement techniques in high power laser devices.
【作者单位】：中国工程物理研究院激光聚变研究中心;等离子体物理重点实验室;中国工程物理研究院研究生院;
【基金】：国家自然科学基金(61377102,61605185) 中物院激光聚变研究中心青年人才成长基金
【分类号】：TN24

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