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On-axis spectral shifts and spectral switches of Gaussian Schell-model beams focused by an astigmatic aperture lens |
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| Authors: | Xiao Yuan,Liuzhan Pan,Baida Lü |
| Affiliation: | a State Key Laboratory of Laser Technology, Huazhong University of Science & Technology, Wuhan 430074, China b Department of Physics, Luoyang Normal College, Luoyang 471022, China c College of Physics and Information Engineering, Henan Normal University, Xinxiang 453002, China d Institute of Laser Physics & Chemistry, Sichuan University, Chengdu 610064, China |
| Abstract: | Starting from the propagation law of partially coherent light, the on-axis spectral shifts and spectral switches of Gaussian Schell-model (GSM) beams focused by an astigmatic aperture lens are studied. It is shown that, as compared with an aberration-free case whose spectral shifts and spectral switches are induced by spatial correlation and aperture diffraction, the spectral shifts and spectral switches of GSM beams also depend upon the astigmatism of the lens for an astigmatism case. Detailed numerical calculations are made to illustrate the behavior of spectral shifts and spectral switches of GSM beams focused by an astigmatic aperture lens. |
| Keywords: | Spectral switch Astigmatism Aperture lens Gaussian Schell-model (GSM) beam |
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