中国激光, 2013, 40 (9): 0905006, 网络出版: 2013-08-27   

高功率紫外纳秒激光脉冲的光纤取样传输特性研究

Research of Sampling and Propagating Characteristics of High Power Ultraviolet Nanosecond Laser Pulse
作者单位
1 中国科学院上海光学精密机械研究所高功率激光物理国家实验室, 上海 201800
2 中国科学院大学, 北京 100049
摘要
在神光Ⅱ系列装置中,为降低成本和减少示波器、快响应光电管等设备的使用,采用紫外光纤对高功率紫外纳秒激光脉冲进行取样并束测量。对高功率紫外纳秒激光脉冲在光纤中的传输特性和保真传输条件进行了理论分析和模拟研究,并据此选取了不同芯径的阶跃型紫外多模光纤进行实验研究。结果表明,对于芯径为25 μm的光纤,传输纳秒量级的紫外激光脉冲时畸变小,能进行较长距离传输,可以作为紫外激光脉冲的取样传输介质。利用芯径为25 μm的光纤演示了光纤取样传输并束测量实验方案,验证了光纤并束测量的可行性。研究结果为神光Ⅱ高功率紫外激光脉冲时间波形的光纤并束测量提供了理论和实验依据。
Abstract
In order to lower the costs, and reduce the use of devices such as osillograph and fast response photodiode in SG Ⅱ, the ultraviolet optical fiber is used to sample and integrate measurement for the high power ultraviolet nanosecond laser pulse. Through the theoretical analysis and simulation study of the propagate characteristics and the condition of distortionless propagation of the high power ultraviolet nanosecond laser pulse in the optical fiber, different core diameter fibers are chosen to carry on the experimental research. It shows that the distortion is low when the high power ultraviolet nanosecond laser pulse propagates in the 25 μm core diameter fiber. The 25 μm core diameter optical fiber is suitable for long distance propagation and is a preferable medium for fiber sampling and propagating. A demonstrative experiment is taken to prove the feasibility of integrate measurement. These results provide theoretical and experimental basis for the high power laser pulse integration measurement of SG Ⅱ.

唐清, 杨琳, 郭亚晶, 欧阳小平, 唐顺兴, 朱宝强. 高功率紫外纳秒激光脉冲的光纤取样传输特性研究[J]. 中国激光, 2013, 40(9): 0905006. Tang Qing, Yang Lin, Guo Yajing, Ouyang Xiaoping, Tang Shunxing, Zhu Baoqiang. Research of Sampling and Propagating Characteristics of High Power Ultraviolet Nanosecond Laser Pulse[J]. Chinese Journal of Lasers, 2013, 40(9): 0905006.

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