Propagation properties of partially coherent modified Bessel–Gauss beams |
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Authors: | Li Wang Xiqing Wang Baida Lü |
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Institution: | aDepartment of Applied Physics, Southwest Jiaotong University, Chengdu 610031, PR China;bInstitute of Laser Physics and Laser Chemistry, Sichuan University, Chengdu 610064, PR China |
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Abstract: | Starting from the propagation law of partially coherent light, the analytical propagation equations of partially coherent modified Bessel–Gauss beams (MBGBs) through a paraxial optical ABCD system are derived and illustrated with typical application examples. Furthermore, by using the intensity moments method and integral transformation technique, the important characteristic parameters, including the beam width, far-field divergence angle, M2 factor and kurtosis parameter of partially coherent MBGBs, are expressed in a closed and simple form. As a result, some basic properties of MBGBs and the dependence of the M2 factor and kurtosis parameter on the spectral degree of coherence and beam order are illustrated both analytically and numerically. |
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Keywords: | Partially coherent modified Bessel– Gauss beam (MBGB) Propagation Beam width M2 factor Kurtosis parameter |
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