Propagation of the off-axis superposition of partially coherent beams through atmospheric turbulence

• 来源期刊: 中国物理B（英文版）
• 关键词: off-axis superposition of partially coherent beams atmospheric turbulence propagation property beam quality
• 年，卷（期）: 2009,（2）
• 页码范围: 571-580
• 页数: 10页
• 语种: 英文

摘要

The propagation properties of the off-axis superposition of partially coherent beams through atmospheric tur-bulence and their beam quality in terms of the mean-squared beam width w(z) and the power in the bucket (PIB)are studied in detail, where the effects of partial coherence, off-axis beam superposition and atmospheric turbulence are considered. The analytical expressions for the intensity, the beam width and the PIB are derived, and illustrative examples are given numerically. It is shown that the maximum intensity/max and the PIB decrease and ω(z) increases as the refraction index structure constant C2n increases. Therefore, the turbulence results in a degradation of the beam quality. However, the resulting partially coherent beam with a smaller value of spatial correlation parameter γ and larger values of separate distance Xd and beam number M is less affected by the turbulence than that with a larger value of γ and smaller values of xd and M. The main results obtained in this paper are explained physically.