Time-resolved beam profiler for far-field high repetition rate pulsed laser

IEEE 2011 10th International Conference on Electronic Measurement & Instruments Pub Date : 2011-10-10 DOI:10.1109/ICEMI.2011.6037672

Guo-bin Feng, Z. Jianmin, Feng Gang, P. Yang, Wang Zhenbao, An Yuying

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引用次数: 1

Abstract

Measuring far-field laser beam profile is an effective way to study the atmospheric transmission effects of high power laser and analyze the laser transmission efficiency in a long distance. A laser beam profiler based on detector array is developed to measure the far-field beam absolute intensity and temporal-spatial distribution of the high repetition rate pulsed laser beam. In the experiment, the pulse width of laser is about 100ns, the repetition rate is adjustable between 1 kHz and 20 kHz, and the diameter of the far-field beam is about 20cm. The detector array is composed of 297 Si-PIN photodiode detectors with the spatial resolution of 1cm in the central region. The image of the far-field beam profile is reconstructed with the bilinear interpolation method. The beam profiler is capable for measuring far-field beam profile of high repetition rate pulsed laser, with response wavelength between 400nm and 1100nm, minimal detectable pulse width of about 10ns, and dynamic range of energy density of 0.02–100µJ/cm2.

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用于远场高重复率脉冲激光器的时间分辨光束剖面仪

测量远场激光束廓形是研究高功率激光大气传输效应和分析激光远距离传输效率的有效途径。研制了一种基于探测器阵列的激光束廓形仪，用于测量高重复频率脉冲激光束的远场光束绝对强度和时空分布。实验中，激光脉冲宽度约为100ns，重复频率在1 kHz ~ 20 kHz之间可调，远场光束直径约为20cm。探测器阵列由297个Si-PIN光电二极管探测器组成，中心区域空间分辨率为1cm。采用双线性插值法重建远场光束轮廓图像。该光束廓形仪能够测量高重复率脉冲激光远场光束廓形，响应波长为400nm ~ 1100nm，最小可探测脉宽约10ns，能量密度动态范围为0.02 ~ 100µJ/cm2。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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IEEE 2011 10th International Conference on Electronic Measurement & Instruments

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