矩形谱宽带激光中带宽诱导的焦开关现象
发布时间:2018-08-29 13:27
【摘要】:为了研究频带宽度对激光光束传输和激光应用产生的影响,采用衍射积分推导了矩形谱宽带激光通过双焦色散透镜后的传输公式,利用数值计算研究了矩形谱宽带激光带宽诱导的焦开关现象,分析得到带宽对光强分布和焦开关的影响。结果表明,带宽是影响光强分布和焦开关形成的重要因素;带宽变化会导致光强分布中光强主极大从一个位置跃变到另一个位置,从而形成焦开关现象。该研究结果有助于进一步推动宽频带激光的应用。
[Abstract]:In order to study the influence of frequency band width on laser beam propagation and laser application, the propagation formula of rectangular spectrum broadband laser passing through a bifocal dispersion lens is derived by using diffraction integral. The phenomenon of focal switch induced by rectangular spectrum broadband laser bandwidth is studied numerically. The influence of bandwidth on intensity distribution and focal switch is analyzed. The results show that the bandwidth is an important factor affecting the distribution of light intensity and the formation of focal switch, and the variation of bandwidth will lead to the maximum change of light intensity from one position to another, thus forming the phenomenon of focal switch. The results are helpful to further promote the application of broadband lasers.
【作者单位】: 长沙理工大学物理与电子科学学院;
【基金】:长沙市科技计划重点资助项目(K1207107-11)
【分类号】:TN24
本文编号:2211341
[Abstract]:In order to study the influence of frequency band width on laser beam propagation and laser application, the propagation formula of rectangular spectrum broadband laser passing through a bifocal dispersion lens is derived by using diffraction integral. The phenomenon of focal switch induced by rectangular spectrum broadband laser bandwidth is studied numerically. The influence of bandwidth on intensity distribution and focal switch is analyzed. The results show that the bandwidth is an important factor affecting the distribution of light intensity and the formation of focal switch, and the variation of bandwidth will lead to the maximum change of light intensity from one position to another, thus forming the phenomenon of focal switch. The results are helpful to further promote the application of broadband lasers.
【作者单位】: 长沙理工大学物理与电子科学学院;
【基金】:长沙市科技计划重点资助项目(K1207107-11)
【分类号】:TN24
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