纳秒Bessel光束截面光强的分布  

The Optical Intensity Distribution in Cross-section of Nanosecond Bessel Beam

作　　者：陈云彬[1] 吴逢铁[1] 郭东栋[1] 

机构地区：[1]华侨大学信息科学与工程学院,福建泉州362021

出　　处：《光电子．激光》2007年第10期1252-1254,共3页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金资助项目(60477041);福建省自然科学基金资助项目(A0710011;A0410017)

摘　　要：由衍射积分理论给出平行光通过轴棱锥后的光场分布表达式,模拟得到Bessel光束截面光强分布图。利用轴棱锥法,以平-抗共振环(ARR)介稳腔Nd:YAG调Q激光器为光源,获得高稳定的纳秒Bessel光脉冲。通过胶片扫描法和激光光斑能量分布的三维可视化方法,获得纳秒Bessel光截面光强的二维及三维能量分布图。实验结果与理论模拟基本吻合。实验结果表明,通过上述方法得到的分布图达到了比DataRay公司的Taper-CamD-UCM-20-15型光束分析仪要高的图像分辨率,是一种记录ps、甚至fs超短光脉冲空间能量分布的有效方法。Based on the theory of diffraction integral,the optical field distribution of plane wave passing through an axicon is given, and he intensity distribution in cross-section of Bessel beam is simulated. In the experiment, using a Nd： YAG Q switched laser with the plane-ARR critical resonator and a axicon,a high stability nanosecond Bessel beam is obtained. Based on the film-scanning and the 3-D visualization of the energy distribution in laser spot,the 2D and 3D energy distribution in cross-section of nanosecond Bessel beam are shown. There is a good agreement between experimental observation and theoretical simulation,moreover by comparing with the laser beam analyzer of TaperCamD-UCM-20-15 made by DataRay Corporation,a higher image re.solution can be obtained. Furthermore,it will be an effective way to record the spatial energy distribution of picosecond ultrashort pulse,even of femtosecond.

关 键 词：纳秒 BESSEL光束 轴棱锥 胶片扫描 三维可视化 截面光强 光束分析仪 

分 类 号：O436[机械工程—光学工程]