Focusing properties and focal depth of amplitude modulation Gaussian beams

Jinsong Li; Songlin Zhuang; Huizhen Feng

doi:10.1117/12.757218

4 January 2008 Focusing properties and focal depth of amplitude modulation Gaussian beams

Jinsong Li, Songlin Zhuang, Huizhen Feng

Proceedings Volume 6832, Holography and Diffractive Optics III; 68322F (2008) https://doi.org/10.1117/12.757218
Event: Photonics Asia 2007, 2007, Beijing, China

Abstract

The focusing properties and focal depth of amplitude modulation Gaussian beams are investigated. Numerical results show that the intensity in the focus plane is circle shape in the low numerical-aperture optical system, while the intensity distribution in the focal plane is ellipse shape in high numerical-aperture optical system due to contribution of depolarized longitudinal component. Focal spot size and focal depth can be adjusted by changing geometrical parameters and the modulation amplitude power n of Gaussian beams. The tunable range of the focal depth is very considerable.

Citation Download Citation

Jinsong Li, Songlin Zhuang, and Huizhen Feng "Focusing properties and focal depth of amplitude modulation Gaussian beams", Proc. SPIE 6832, Holography and Diffractive Optics III, 68322F (4 January 2008); https://doi.org/10.1117/12.757218

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