Title :
Focusing properties of cylindrical vectorial hollow Gaussian Beam
Author :
Ying Fang ; Jinsong Li ; Xiumin Gao
Author_Institution :
Coll. of Opt. & Electron. Technol., China Jiliang Univ., Hangzhou, China
Abstract :
Hollow Gaussian beam (HGB) is very useful mathematical model to describe dark hollow beam (DHB). In this article, the focusing properties of cylindrical vector hollow Gaussian beam are investigated theoretically by vector diffraction theory. Simulation results show that the optical intensity in focal region of HGB can be altered considerably by changing the polarization angle and the order of HGB. Higher order of the HGB may induce higher focal depth with shrinking transverse focal spot. The focal spot can evolve into a focal ring with increasing of polarization angle. Effect of the order of HGB weakens in low numerical aperture focusing system.
Keywords :
Gaussian distribution; light diffraction; light polarisation; optical focusing; cylindrical vectorial hollow Gaussian beam; dark hollow beam; focusing properties; low numerical aperture focusing system; mathematical model; polarization angle; shrinking transverse focal spot; vector diffraction theory; Focusing; Laser beams; Optical diffraction; Optical polarization; Optical refraction; Optical scattering; Optimized production technology; Focusing property; hollow Gaussian beam; vector diffraction theory;
Conference_Titel :
Image and Signal Processing (CISP), 2010 3rd International Congress on
Conference_Location :
Yantai
Print_ISBN :
978-1-4244-6513-2
DOI :
10.1109/CISP.2010.5647603
