二极管抽运固体激光器热效应的非对称性分析  

Analysis of thermal axial symmetry in the LD side-pumped laser

作　　者：林林[1] 过振[1] 王石语[1] 刘海强[1] 蔡德芳[1] 李兵斌[1] 

机构地区：[1]西安电子科技大学技术物理学院,陕西西安710071

出　　处：《西安电子科技大学学报》2011年第2期141-145,186,共6页Journal of Xidian University

基　　金：预研基金资助项目(9140A02010106DZ0101)

摘　　要：通过分析光在晶体前后端面相位延迟的空间分布,研究了激光二极管侧面抽运固体激光器热效应的非轴对称性.提出一种评价热效应轴对称程度的参数——非圆度,并使用有限元方法分析了抽运功率、抽运源数量、抽运源之间的角度偏差和抽运距离偏差对非圆度的影响.得到的结论有:抽运功率越小,或者抽运源空间排布越对称,晶体中的热效应轴对称程度越高;装配中抽运光之间的角度偏差和抽运距离偏差使晶体热效应非轴对称性增加,装配时应尽量保证各抽运源角度和抽运距离一致.Based on the analysis of phase delay distribution between two ends of the laser crystal,thermal axial symmetry in an LD side-pumped laser is investigated.A new parameter for describing the thermal axial symmetry is proposed.The influence of pumping power,quantity,angular deviation and pumping distance deviation of LDs is analyzed by the finite element method.The result obtained indicates that the lower the pumping power is,or the more symmetrically the LDs are distributed,the more symmetrical the thermal effect appears;during the assembling process,the LD angular deviation and pumping distance deviation prevent the thermal lens effect from symmetrical axial distribution,which needs to be paid attention to and avoided.

关 键 词：激光器 固体激光器 热效应 有限元法 轴对称性 

分 类 号：TN248.1[电子电信—物理电子学]