激光自再现模数值计算方法研究  

Numerical Methods for Calculating Laser Self-reproducing Modes

作　　者：孟颖[1] 张贵阳[2] 魏晓马 周见红[1] 

机构地区：[1]长春理工大学光电工程学院,长春130022 [2]哈尔滨工业大学航天学院,哈尔滨150006

出　　处：《长春理工大学学报（自然科学版）》2014年第6期86-89,共4页Journal of Changchun University of Science and Technology(Natural Science Edition)

摘　　要：为提高激光光束输出质量,对激光谐振腔进行了研究和设计。利用菲涅耳-基尔霍夫衍射积分公式,采用数值计算的方式对积分进行离散,并利用迭代法和本征值法对谐振腔的自再现模和衍射损耗进行研究,两种处理方式的结果一致。研究结果表明,对于平面谐振腔的基模衍射损耗只有2.52%。采用数值离散的方式,迭代法可以很容易的给出模式的演化过程,而本征值法可以同时求出所有的模式和损耗。提出的方法为激光器的设计提供了一种很好的研究途径。In order to promote the design and fabrication of the laser resonant cavity and improve the laser beam output quality,in this paper,iterative method and eigenvalue method are used to calculate self-reproducing modes and the diffraction loss based on the Fresnel-kirchhoff diffraction theory by using the numerical discretion of the integration.Excellent agreements of the diffraction loss and the output patterns obtained by the two methods are found.Results show that for planar mirror cavity,the diffraction loss of the basic mode is as small as 2.52%.Using numerical discretion approach,iterative method can be used to demonstrate the time evolution of the modes while the eigenmode method can be used to achieve the mode distributions and the corresponding loss.The methods proposed here broaden the way of laser design.

关 键 词：自再现模 迭代法 本征值法 

分 类 号：TN241[电子电信—物理电子学]