CAJ | 학술논문

为了解决高功率激光系统中,尤其是多程放大系统中波前畸变校正和光路准直之间的相互干扰问题,针对包含自适应光学系统的四程放大系统,利用菲涅耳衍射积分理论,建立了310 mm×310 mm大口径光束的四程传输模型,采用坐标扩展变换的方法解决了传统计算中同时需求近、远场高分辨率带来的计算量过大问题;基于此模型,比较了质心法、圆拟合法和纯相位匹配滤波等三种图像处理算法对存在波面差的光束的远场中心的处理精度;分析了波面校正对焦斑位置的影响;本文内容为四程放大系统准直调整方案的优化提供了重要依据.
위료해결고공솔격광계통중,우기시다정방대계통중파전기변교정화광로준직지간적상호간우문제,침대포함자괄응광학계통적사정방대계통,이용비열이연사적분이론,건립료310 mm×310 mm대구경광속적사정전수모형,채용좌표확전변환적방법해결료전통계산중동시수구근、원장고분변솔대래적계산량과대문제;기우차모형,비교료질심법、원의합법화순상위필배려파등삼충도상처리산법대존재파면차적광속적원장중심적처리정도;분석료파면교정대초반위치적영향;본문내용위사정방대계통준직조정방안적우화제공료중요의거.
In order to solve the interaction problem between the wavefront distortion correction and optical alignment in a high-power laser system, especially in a multi-pass amplification system, based on fresnel diffraction integral theory, the beam propagation model of 310 mm×310 mm aperture beam in four-pass amplifier is built by analyzing the properties of this system. The problem of excessive amount of calculation, caused by high resolution in traditional calculation, is solved by coordinate transformation method, Using this model, the differences of far-field accuracy among centroid method, circle fitting and pure phase matching filter in beam with wavefront distortion are discussed;what influence the wavefront correction has on focal spot position is analyzed. This article provides an important basis for optimizing collimation adjustment programs in four-pass amplifier.