华侨大学学报（自然科学版）2011，Vol.32Issue(1)：22-29,8.
部分相干电磁光束在湍流大气中传输的交叉偏振度
Degree of Cross-Polarization of Partially Coherent Electromagnetic Beams Propagating in Turbulent Atmosphere
摘要
Abstract
The cross-spectral density matrix of partially coherent Gaussian-Schell model electromagnetic beams propagating in atmospheric turbulence is derived. Based on the theory of degree of cross-polarization, the behaviour of partially coherent electromagnetic beams propagating through the atmospheric turbulence is investigated. It is shown that the degree of cross-polarization depends on the refraction index structure constant of turbulence, the correlation length of the source, the initial degree of polarization and the observation point. The degree of polarization is different from the usual degree of polarization which is restricted to the range 0～1, it may take on any nonnegative values. It is also found, the distribution of degree of cross-polarization is different from the usual degree of polarization, presents the trend of first diffuse then shrink. And, when the correlation length of the source takes same values, the degree of cross-polarization which the beams propagate in atmospheric turbulence will keep invariant value.关键词
部分相干/电磁光束/高斯-谢尔模型/湍流大气/交叉偏振度Key words
partially coherent/ electromagnetic beam/ Gaussian-Schell model； atmospheric turbulence/ degree of crosspolarization分类
数理科学引用本文复制引用
张国文,蒲继雄..部分相干电磁光束在湍流大气中传输的交叉偏振度[J].华侨大学学报（自然科学版）,2011,32(1):22-29,8.基金项目
福建省科技计划重点项目(2007H0027) （2007H0027）
