Fractional Fourier transform of flat-topped multi-Gaussian beams based on the Wigner distribution function

• 来源期刊: 中国物理(英文版)
• 关键词: Wigner distribution function flat-topped multi-Gaussian beam fraction Fourier transform
• 年，卷（期）: 2005,（6）
• 页码范围: 1130-1135
• 页数: 6页
• 语种: 英文

摘要

By using the Wigner distribution function, the fractional Fourier transform (FRFT) of flat-topped multi-Gaussian (FTMG) beams is studied. Analytical expressions for the intensity distribution, beam width, far-field divergence angle,M2 factor and K parameter of FTMG beams are derived. The influence of fractional order on transformation properties of FTMG beams in the FRFT plane is illustrated with numerical examples.