Collimated the laser diode beam by the focus lens

Qiang Xu; Jing Li; Wei Zhang

doi:10.1117/12.871680

12 November 2010 Collimated the laser diode beam by the focus lens

Qiang Xu, Jing Li, Wei Zhang

Author Affiliations +

Proceedings Volume 7844, Semiconductor Lasers and Applications IV; 78441A (2010) https://doi.org/10.1117/12.871680
Event: Photonics Asia 2010, 2010, Beijing, China

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.

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Qiang Xu, Jing Li, and Wei Zhang "Collimated the laser diode beam by the focus lens", Proc. SPIE 7844, Semiconductor Lasers and Applications IV, 78441A (12 November 2010); https://doi.org/10.1117/12.871680

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