物理学报Issue(19)：208-214,7.DOI:10.7498/aps.62.194202
像散椭圆高斯光束的M2因子矩阵的理论与实验研究
Theoretical and experimental study on M 2 factor matrix for astigmatic elliptical Gaussian beam
摘要
Abstract
M2x and M2y are provided for characterizing and measuring the beam quality of an astigmatic elliptical Gaussian beam. The value undergoes certain changes when the beam is not at an arbitrary azimuth angleα. Accordingly, problem arises: merely using M2x and M2y cannot characterize beam quality effectively. So in this paper M2 factor matrix is introduced. The M2 factor matrix for the beam at an azimuth angleαis theoretically derived. It is found that elements of the matrix for the original field are related to that beam at azimuth angleα. The matrix elements, including diagonal and off-diagonal elements, versus azimuth angleαhave been presented on the basis of calculation results. Theoretical results are in agreement with experimental ones. Results imply that the sum of M2x and M2y for an astigmatic elliptical Gaussian beam is to be minimum as the principal axes correspond to the laboratory coordinate axes;off-diagonal elements, however, vary periodically with the variation inα, and are to be zero as the principal axes correspond to the laboratory coordinate axes.关键词
M2因子矩阵/像散椭圆高斯光束/实验测量/矩阵光学Key words
M2 factor matrix/astigmatic elliptical Gaussian beam/measurement/matrix optics引用本文复制引用
刘晓丽,冯国英,李玮,唐淳,周寿桓..像散椭圆高斯光束的M2因子矩阵的理论与实验研究[J].物理学报,2013,(19):208-214,7.基金项目
国家自然科学基金(批准号:60890200)和固体激光国家级重点实验室基金资助的课题 （批准号:60890200）
