中国物理B ›› 2009, Vol. 18 ›› Issue (9): 3883-3889.doi: 10.1088/1674-1056/18/9/044

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Can two partially coherent cosh--Gaussian beams generate far fields with the same spectral degree of coherence?

吕百达1, 吕素叶2   

  1. (1)Institute of Laser Physics and Chemistry, Sichuan University, Chengdu 610064, China; (2)Institute of Laser Physics and Chemistry, Sichuan University, Chengdu 610064, China;School of Sciences of Southwest Petroleum University, Chengdu 610500, China
  • 收稿日期:2009-02-26 修回日期:2009-03-06 出版日期:2009-09-20 发布日期:2009-09-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10574097 and 10874125).

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)†   

  1. a Institute of Laser Physics and Chemistry, Sichuan University, Chengdu 610064, China; b School of Sciences of Southwest Petroleum University, Chengdu 610500, China
  • Received:2009-02-26 Revised:2009-03-06 Online:2009-09-20 Published:2009-09-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10574097 and 10874125).

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摘要： 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.

关键词: spectral degree of coherence, radiant intensity, partially coherent cosh--Gaussian beam

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.

Key words: spectral degree of coherence, radiant intensity, partially coherent cosh--Gaussian beam

中图分类号:  (Coherence)

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