矩形譜寬帶激光中帶寬誘導(dǎo)的焦開關(guān)現(xiàn)象
發(fā)布時(shí)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(yīng)用產(chǎn)生的影響,采用衍射積分推導(dǎo)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(shù)值計(jì)算研究了矩形譜寬帶激光帶寬誘導(dǎo)的焦開關(guān)現(xiàn)象,分析得到帶寬對光強(qiáng)分布和焦開關(guān)的影響。結(jié)果表明,帶寬是影響光強(qiáng)分布和焦開關(guān)形成的重要因素;帶寬變化會導(dǎo)致光強(qiáng)分布中光強(qiáng)主極大從一個(gè)位置躍變到另一個(gè)位置,從而形成焦開關(guān)現(xiàn)象。該研究結(jié)果有助于進(jìn)一步推動寬頻帶激光的應(yīng)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(xué)物理與電子科學(xué)學(xué)院;
【基金】:長沙市科技計(jì)劃重點(diǎn)資助項(xiàng)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(xué)物理與電子科學(xué)學(xué)院;
【基金】:長沙市科技計(jì)劃重點(diǎn)資助項(xiàng)目(K1207107-11)
【分類號】:TN24
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