期刊
OPTICS AND LASER TECHNOLOGY
卷 43, 期 8, 页码 1442-1447出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.optlastec.2011.04.016
关键词
Beam propagation factor; Non-Kolmogorov turbulence; Superposition of the cross-spectral density function and the intensity
资金
- National Natural Science Foundation of China [60837004]
- SRF
- Fundamental Research Funds for the Central Universities [YWF-10-02-031]
- innovation Foundation of CAST [20090304]
- National Hi-Tech Research and Development (863) Program
- SEM
The analytical expression for the beam propagation factor (M-2-factor) of a radial Gaussian-Schell model (GSM) beam array propagating in non-Kolmogorov turbulence is derived. The influences of beam number, ring radius and generalized exponent on the M-2-factor are investigated. The results indicate that the M-2-factor has great dependence on the generalized exponent and the beam number. Moreover, there is an optimum ring radius, which leads to a minimum M-2-factor and increases with increase in beam number. Further, the M-2-factor for the superposition of the intensity is larger than that for the superposition of the cross-spectral density function (CSDF). However, the M-2-factor for the superposition of the intensity is less sensitive to the turbulence than that for the superposition of the CSDF. (C) 2011 Elsevier Ltd. All rights reserved.
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