Can two partially coherent cosh--Gaussian beams generate far fields with the same spectral degree of coherence?
Lü Su-Ye(吕素叶)a)b) and Lü Bai-Da(吕百达)a)†
a Institute of Laser Physics and Chemistry, Sichuan University, Chengdu 610064, China; b School of Sciences of Southwest Petroleum University, Chengdu 610500, China
Abstract Taking partially coherent cosh--Gaussian (ChG) beams as an example of more general partially coherent beams, we have studied the spectral degree of coherence of partially coherent ChG beams in the far field. It is shown that, unlike Gaussian Schell-model (GSM) beams, in the strict sense there do not exist two partially coherent ChG beams which can generate far fields with the same spectral degree of coherence. However, under certain conditions it is possible to find two partially coherent ChG beams with the same spectral degree of coherence in the far field.
Received: 26 February 2009
Revised: 06 March 2009
Accepted manuscript online:
Fund: Project supported
by the National Natural Science Foundation of China (Grant Nos
10574097 and 10874125).
Cite this article:
Lü Su-Ye(吕素叶) and Lü Bai-Da(吕百达) Can two partially coherent cosh--Gaussian beams generate far fields with the same spectral degree of coherence? 2009 Chin. Phys. B 18 3883
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