共 45 条
Modulation of spectral intensity, polarization and coherence of a stochastic electromagnetic beam
被引:20
作者:
Wu, Gaofeng
[1
]
Cai, Yangjian
[1
]
机构:
[1] Suzhou Univ, Sch Phys Sci & Technol, Suzhou 215006, Peoples R China
来源:
OPTICS EXPRESS
|
2011年
/
19卷
/
09期
基金:
中国国家自然科学基金;
关键词:
DARK HOLLOW BEAMS;
SCHELL-MODEL BEAMS;
FLAT-TOPPED BEAMS;
PROPAGATION FACTOR;
GAUSSIAN-BEAM;
RADIATION FORCE;
GENERATION;
M-2-FACTOR;
TURBULENCE;
APERTURE;
D O I:
10.1364/OE.19.008700
中图分类号:
O43 [光学];
学科分类号:
070207 ;
0803 ;
摘要:
Analytical formula for the cross-spectral density matrix of a stochastic electromagnetic Gaussian Schell-model (EGSM) beam truncated by a circular phase aperture propagating in free space is derived with the help of a tensor method, which provides a reliable and fast way for studying the propagation and transformation of a truncated EGSM beam. Statistics properties, such as the spectral intensity, the degree of coherence, the degree of polarization and the polarization ellipse of a truncated EGSM beam in free space are studied numerically. The propagation factor of a truncated EGSM beam is also analyzed. Our numerical results show that we can modulate the spectral intensity, the polarization, the coherence and the propagation factor of an EGSM beam by a circular phase aperture. It is found that the phase aperture can be used to shape the beam profile of an EGSM beam and generate electromagnetic partially coherent dark hollow or flat-topped beam, which is useful in some applications, such as optical trapping, material processing, free-space optical communications. (C)2011 Optical Society of America
引用
收藏
页码:8700 / 8714
页数:15
相关论文
共 45 条