Mao Haidan, Zhao Daomu
Department of Physics, Zhejiang University, Hangzhou, China.
Opt Express. 2010 Jan 18;18(2):1741-55. doi: 10.1364/OE.18.001741.
Based on the intensity moments and Wigner distribution function, the second-order moments for broadband partially coherent flat-topped (BPCFT) beams in atmospheric turbulence are studied. The beam width of BPCFT beams in atmospheric turbulence is larger than that in free space. The beam width of BPCFT beams in atmospheric turbulence is larger than that of broadband fully coherent flat-topped (BFCFT) beams in atmospheric turbulence. The broader the bandwidth is, the larger the beam width of BPCFT beams becomes. Similar conclusion can be obtained by analyzing the divergence angle and beam propagation factor of BPCFT beams. The beam width of BPCFT beams in atmospheric turbulence is less affected by the broad spectral bandwidth than that in free space. The beam width of BFCFT beams in atmospheric turbulence is less affected by the broad spectral bandwidth than that of BPCFT beams in atmospheric turbulence.
基于强度矩和维格纳分布函数，研究了大气湍流中宽带部分相干平顶（BPCFT）光束的二阶矩。大气湍流中BPCFT光束的束宽比自由空间中的束宽大。大气湍流中BPCFT光束的束宽比大气湍流中宽带完全相干平顶（BFCFT）光束的束宽大。带宽越宽，BPCFT光束的束宽越大。通过分析BPCFT光束的发散角和光束传输因子也可得到类似结论。大气湍流中BPCFT光束的束宽受宽光谱带宽的影响比自由空间中的小。大气湍流中BFCFT光束的束宽受宽光谱带宽的影响比大气湍流中BPCFT光束的小。
