Nonparaxial propagation of spatially and spectrally partially coherent electromagnetic Cosh-Gaussian pulsed beams

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• 作者：Haixia Wang ; Chaoliang Ding ; Zhiguo Zhao ; Yongtao Zhang ; Liuzhan Pan ; ^{panliuzhan@263.net}
• 关键词：Electromagnetic ChG pulsed beams ; Polarization ; Nonparaxiality
• 刊名：Optics and Laser Technology
• 出版年：2012
• 出版时间：September, 2012
• 年：2012
• 卷：44
• 期：6
• 页码：1800-1807
• 全文大小：880 K

文摘

Based on the generalized Rayleigh-Sommerfeld diffraction integral, the analytical expression for 3¡Á3 cross-spectral density matrix of nonparaxial spatially and spectrally partially coherent electromagnetic Cosh-Gaussian (ChG) pulsed beams propagating in free space is derived, and used to formulate the spectral density and spectral degree of polarization of electromagnetic pulsed beams at the z-plane. It is found that the parameters f and f_¦Á¦Á are the key parameters in determining the nonparaxiality of spatially and spectrally partially coherent electromagnetic ChG pulsed beams. And the decentered parameter, pulse duration and temporal coherence length can change the nonparaxial behavior of the electromagnetic ChG pulsed beams. The effect of decentered parameter, pulse duration and temporal coherence length on the spectral density and spectral degree of polarization of electromagnetic ChG pulsed beams is illustrated through numerical calculations. Propagation of nonparaxial spatially and spectrally partially coherent electromagnetic Gaussian Schell-model pulsed beams can be treated as a special case when the decentered parameter of electromagnetic ChG pulsed beams approaches to zero.