Tight focusing of amplitude modulated HyGG type — II beam using high NA lens axicon

Author

Suresh, Padmashri ; Rajesh, K.B. ; Pillai, T.V.S.

Author_Institution

Dept. of ECE, Nat. Coll. of Eng., Tirunelveli, India

fYear

2012

fDate

9-12 Dec. 2012

Firstpage

1

Lastpage

3

Abstract

The focal field of high NA lens axicon with an amplitude modulated optical component is calculated by using vector diffraction theory. Numerical results show that for a radially polarized Hypergeometric-Gaussian type-II input field, the proposed system generates subwavelength focal spot size (0.386 λ) with a uniform depth of Focus (14.38 λ). We expect such a beam with small spot size and long depth of focus can be widely used in application such as data storage, biomedical imaging, laser drilling, and machining.

Keywords

amplitude modulation; lenses; light diffraction; light polarisation; numerical analysis; optical focusing; optical modulation; amplitude modulated HyGG type II beam; amplitude modulated optical component; biomedical imaging; data storage; focal field; high NA lens axicon; laser drilling; laser machining; numerical analysis; optical focusing; radially polarized Hypergeometric-Gaussian type-II input field; subwavelength focal spot size; uniform depth of focus; vector diffraction theory;

fLanguage

English

Publisher

ieee

Conference_Titel

Fiber Optics and Photonics (PHOTONICS), 2012 International Conference on

Conference_Location

Chennai

Print_ISBN

978-1-4673-4718-1

Type

conf

Filename

6545525