Ms. Fanqi Shen Profile

Fanqi Shen

at Zhejiang Univ

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Proceedings Article | 28 November 2023 Paper

Tailoring freeform beam-shaping lenses for edge-emitting lasers

Fanqi Shen, Lin Yang, Rengmao Wu

Proceedings Volume 12765, 127650J (2023) https://doi.org/10.1117/12.2687146

KEYWORDS: Freeform optics, Wavefronts, Light sources and illumination, Lenses, Design and modelling, Beam shaping, Beam divergence, Semiconductor lasers, Optical components

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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.

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