Paper
28 November 2023 Tailoring freeform beam-shaping lenses for edge-emitting lasers
Author Affiliations +
Abstract
The edge-emitting laser diodes (EELs) are widely used due to their superior performance, however, the strongly asymmetric beam profile along the fast and slow axes presents a big challenge in the beam shaping of EEL. Traditional optical devices mainly focus on adjusting the asymmetric divergence angle of the fast and slow axes of the EEL, and it is difficult to achieve flexible and precise control of the luminous distribution of the EEL due to the limited freedom of the conventional beam-shaping elements. In this article, we employ freeform lenses to flexibly reshape EEL beams and develop an approach to tackle the obstacles caused by the strongly asymmetric beam profile by generalizing the Monge– Ampère method to tailor freeform beam-shaping lenses for EELs. Three typical but challenging beam-shaping tasks show that both the intensity and wavefront of an EEL beam can be reshaped in a desired manner by the use of a single compact freeform lens without any symmetric restrictions on the architecture of the beam-shaping system.
(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.
Fanqi Shen, Lin Yang, and Rengmao Wu "Tailoring freeform beam-shaping lenses for edge-emitting lasers", Proc. SPIE 12765, Optical Design and Testing XIII, 127650J (28 November 2023); https://doi.org/10.1117/12.2687146
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KEYWORDS
Freeform optics

Wavefronts

Light sources and illumination

Lenses

Beam divergence

Beam shaping

Design and modelling

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