内腔自适应光学系统最速下降算法  

Steepest descent method for adaptive optical intracavity system

作　　者：李俊[1] 严国萍[1] 周华东[2] 杨振刚[2] 

机构地区：[1]华中科技大学电子与信息工程系 [2]华中科技大学光电子科学与工程学院,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2009年第3期1-4,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(10476010)

摘　　要：提出基于微机电系统微变形镜(MEMS-DMs)的动态补偿激光二极管泵浦固体激光器(DPL)热透镜效应,能够使其在获得较小体积和功耗、具备灵活性的同时,提高输出功率.通过分析MEMS-DMs的控制理论和实际器件的性质,说明最小二乘控制算法在DPL自适应补偿中不适用的原因,指出最速下降法更适合于DPL自适应补偿,并给出该非线性规划问题的数学模型和数值求解方法.实验结果表明最速下降法相比最小二乘法而言,迭代过程更稳定,DPL输出功率更高.MEMS-DMs （micro-electro-mechanism system deformable mirrors） are proposed to compensate the thermal lensing effects in DPL （diode pumped laser）. Thus higher output power, smaller volume, lower power dissipation, and flexibility can be achieved. The control theory of MEMS-DMs and characteristics of a real MEMS-DMs component are analyzed. The reasons why least square meth- od is invalid and steepest descent method is more suitable for DPL adaptive compensate system are disscussed. The mathematical model of such nolinear problem is built and the computational solution process is given. The experimental result shows that the steepest descent method is better than least square method, for its both algorithm stability and high OUtDut Dower of DPL.

关 键 词：固体激光器 自适应光学 热透镜效应 微机电系统微变形镜 最速下降算法 

分 类 号：TN241[电子电信—物理电子学]