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Proceedings Paper

Collimated the laser diode beam by the focus lens
Author(s): Qiang Xu; Jing Li; Wei Zhang
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Paper Abstract

The laser diode(LD) beam propagate through the collimating lens is studied here beyond the paraxial approximation, the ray from the LD entering the lens at coordinates on one face emerges at approximately the same coordinate on the opposite face. The lens delays an incident wavefront by an amount proportional to the thickness of the lens at each point, Further propagation of this field can be adequately represented by the calculation of the Rayleigh-Sommerfeld (RS) diffraction integral, and the stationary-phase method is employed in order to find the asymptotic expansion of the diffraction integral. The propagation optical field after the lens is obtained. The model employed to predict the light intensity at various beam cross sections.

Paper Details

Date Published: 12 November 2010
PDF: 5 pages
Proc. SPIE 7844, Semiconductor Lasers and Applications IV, 78441A (12 November 2010); doi: 10.1117/12.871680
Show Author Affiliations
Qiang Xu, Xidian Univ. (China)
Jing Li, Xidian Univ. (China)
Wei Zhang, Xidian Univ. (China)

Published in SPIE Proceedings Vol. 7844:
Semiconductor Lasers and Applications IV
Ning-Hua Zhu; Jinmin Li; Farzin Amzajerdian; Hiroyuki Suzuki, Editor(s)

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