Propagation invariants of twisted Gaussian Schell-model beams |
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| Authors: | Baida Lü ,Yuanjie Peng |
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| Affiliation: | aCollege of Physics and Communication Electronics, Jiangxi Normal University, Nanchang 330027, China;bInstitute of Laser Physics and Chemistry, Sichuan University, Chengdu 610064, China |
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| Abstract: | ![]()
The second-order moments method is used to study the M2 factor and intrinsic astigmatism of twisted Gaussian Schell-model (GSM) beams. It is shown that the M2 factor of twisted GSM beams defined by the determinate of the 4×4 variance matrix is a propagation invariant and is independent of the beam twist, whereas the twist affects the intrinsic astigmatism of twisted GSM beams. |
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| Keywords: | M2 factor Intrinsic astigmatism Twisted Gaussian Schell-model beam Second-order moment Variance matrix |
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