相关参量对纳秒贝塞尔光脉冲光束传输的影响  

Influence of relative parameters on propagation of nanosecond bessel beam pulse

作　　者：吴逢铁[1] 曾夏辉[1] 陈云彬[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》2008年第2期263-269,共7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：在广义的惠更斯-菲涅耳衍射积分理论和稳相法的基础上,研究了纳秒高斯光脉冲通过理想加工和截面成椭圆的轴棱锥后最大无衍射距离内的光场分布,根据导出的光场表达式,数值模拟了三维光强分布及相应光斑图。研究表明在椭圆加工误差存在的情况下,不同椭圆误差、不同传输距离、不同光波波长对纳秒贝塞尔光脉冲光束传输均有影响。实验采用胶片扫描法对垂直于传播轴的横截面内纳秒光斑进行了记录分析。实验结果和理论模拟吻合很好。Based on the generalized Huygens-Fresnel diffraction integral theory and the stationary phase method, within the maximum non-diffraction distance behind an axieon,the optical field distribution of a nanosecond Gaussian beam pulse pass ing through axieons with the ideal manufacture quality and with the elliptical manufacture error were investigated. According to the derived field expression, the three-dimensional intensity distributions and corresponding beam patterns were simulated numerically. It is shown that the different elliptical manufacture error,the propagation distance and the beam Wavelength had an effect on the propagation of the nanosecond Bessel beam pulse in the presence of an elliptical manufacture error in the axcion. The film-scan method was adopted to record the nanosecond beam patterns in the transverse plane which perpendicular to the propagation axis. The experimental results fit the theoretical simulations well.

关 键 词：物理光学 纳秒贝塞尔光脉冲 光束传输 椭圆加工误差 轴棱锥 

分 类 号：O436.1[机械工程—光学工程]