The research on the beam waist of vertical cavity surface-emitting laser

Bingxin Wang; Baolu Guan; Shuai Huang; Wu Hui; Zijun Zhu; Weiyang Zhang

doi:10.1117/12.2639231

29 April 2022 The research on the beam waist of vertical cavity surface-emitting laser

Bingxin Wang, Baolu Guan, Shuai Huang, Wu Hui, Zijun Zhu, Weiyang Zhang

Proceedings Volume 12255, 2022 International Conference on Optoelectronic Information and Functional Materials (OIFM 2022); 122550O (2022) https://doi.org/10.1117/12.2639231
Event: 2022 International Conference on Optoelectronic Information and Functional Materials (OIFM 2022), 2022, Chongqing, China

Abstract

Vertical Cavity Surface Emitting Laser(VCSEL) generally require a beam shaping process before being applied in various scenarios due to the beam propagation characteristics. The beam waist position and size of the VCSEL are critical for beam shaping, associated with the injection current. In this contribution, the theoretical model of the equivalent confocal cavity is innovatively employed to analyze the variation of the beam waist size and the position of VCSEL. Concurrently, a novel approach has been proposed to investigate the variation of the beam waist by measuring the wavefront of the beam transformed by a single lens. The beam waist size is calculated by measuring the far-field divergence of the beam and data reveal that the beam waist diameter decreases from 3.27 μm to 1.15 μm. Combined with the change of beam waist size, the shift of the beam waist position on the optical propagation axis is analyzed in micron level. At the end, we calculate the optimization effect of this study on the beam-collimated.

Citation Download Citation

Bingxin Wang, Baolu Guan, Shuai Huang, Wu Hui, Zijun Zhu, and Weiyang Zhang "The research on the beam waist of vertical cavity surface-emitting laser", Proc. SPIE 12255, 2022 International Conference on Optoelectronic Information and Functional Materials (OIFM 2022), 122550O (29 April 2022); https://doi.org/10.1117/12.2639231

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KEYWORDS

Vertical cavity surface emitting lasers

Wavefronts

Gaussian beams

Confocal microscopy

Beam shaping

Beam propagation method

Thermal effects

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