發(fā)布時間：2018-05-18 15:43

  本文選題：激光光學 + 激光橫模��； 參考：《中國激光》2017年11期

【摘要】：基于諧振腔內(nèi)的非均勻介質(zhì)對激光橫模的耦合作用,提出了一種用于計算諧振腔內(nèi)穩(wěn)定振蕩模式的矩陣算法。激光橫模在諧振腔內(nèi)往返傳播時,其能量在非均勻介質(zhì)的作用下發(fā)生耦合,原本不相干的模式逐漸變得相干。經(jīng)多次往返傳播后,各橫模將按一定的能量比例線性疊加,形成穩(wěn)定振蕩的模式。給出了非均勻介質(zhì)耦合效應的耦合矩陣,并將往返傳播的激光場表示成向量形式,用矩陣計算的方法對介質(zhì)前后的光場變化進行計算。建立了一個穩(wěn)定平凹腔模型,對諧振腔內(nèi)激光場的傳播進行了矩陣計算,在不同條件下計算得到了多個穩(wěn)定振蕩模式,計算結(jié)果與理想模式符合得很好。該研究在一定程度上證明了非均勻介質(zhì)耦合效應的存在,并提供了一種新的快速計算諧振腔內(nèi)穩(wěn)定振蕩模式的方法。
[Abstract]:Based on the coupling effect of the nonuniform medium in the resonator to the laser transverse mode, a matrix algorithm is proposed to calculate the stable oscillation mode in the resonator. When the laser transverse mode propagates back and forth in the resonator, its energy is coupled under the action of the inhomogeneous medium, and the original incoherent mode becomes coherent gradually. After multiple round trips, the transverse modes will be stacked linearly according to a certain ratio of energy to form a stable oscillation mode. The coupling matrix of coupling effect in non-uniform medium is given, and the laser field propagating back and forth is expressed as vector form, and the change of light field before and after the medium is calculated by matrix calculation method. A stable plane-concave cavity model is established and the propagation of laser field in resonator is calculated by matrix method. Several stable oscillation modes are obtained under different conditions. The calculated results are in good agreement with the ideal mode. In this paper, the existence of coupling effect in non-uniform medium is proved to a certain extent, and a new method for fast calculation of stable oscillation mode in resonator is provided.
【作者單位】： 華中科技大學光學與電子信息學院;
【分類號】：TN24

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本文編號：1906428