Vectorial structure and beam quality of vector-vortex Bessel-Gauss beams in the far field

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2012,（z1）
• 页码范围: 193-196
• 页数: 4页
• 语种: 英文
• DOI: 10.3788/COL201210.S12601

摘要

The far-field analytical expressions for the electromagnetic fields of amplitude of vector-vortex beams having a Bessel-Gauss (BG) distribution propagating in free space are obtained based on the vector angular spectrum and the method of stationary phase.The far-field energy flux distributions and the beam quality by the power in the bucket (PIB) in the paraxial and nonparaxial regimes are investigated.The PIB of the vector-vortex BG beams depend on the ratio of the waist width to wavelength and the polarization order.The analyses show that vector-vortex BG beams with low polarization order have better energy focusability in the far field.