矩形譜寬帶激光中帶寬誘導的焦開關現象
發(fā)布時間:2018-08-29 13:27
【摘要】:為了研究頻帶寬度對激光光束傳輸和激光應用產生的影響,采用衍射積分推導了矩形譜寬帶激光通過雙焦色散透鏡后的傳輸公式,利用數值計算研究了矩形譜寬帶激光帶寬誘導的焦開關現象,分析得到帶寬對光強分布和焦開關的影響。結果表明,帶寬是影響光強分布和焦開關形成的重要因素;帶寬變化會導致光強分布中光強主極大從一個位置躍變到另一個位置,從而形成焦開關現象。該研究結果有助于進一步推動寬頻帶激光的應用。
[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.
【作者單位】: 長沙理工大學物理與電子科學學院;
【基金】:長沙市科技計劃重點資助項目(K1207107-11)
【分類號】:TN24
本文編號: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.
【作者單位】: 長沙理工大學物理與電子科學學院;
【基金】:長沙市科技計劃重點資助項目(K1207107-11)
【分類號】:TN24
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