Tunable vortex laser based on intra-cavity aspheric lens

Linghao Zhang; Kegui Xia; Jianlang Li; Aijun Zeng; Huijie Huang

doi:10.1117/12.2587119

2 December 2020 Tunable vortex laser based on intra-cavity aspheric lens

Linghao Zhang, Kegui Xia, Jianlang Li, Aijun Zeng, Huijie Huang

Proceedings Volume 11717, 24th National Laser Conference & Fifteenth National Conference on Laser Technology and Optoelectronics; 117171U (2020) https://doi.org/10.1117/12.2587119
Event: 24th National Laser Conference & Fifteenth National Conference on Laser Technology and Optoelectronics, 2020, Shanghai, China

Abstract

Vortex light is used widely in quantum entanglement, optical communication, high-resolution imaging, optical detection, optical manipulation, and many other fields. In practical applications, stable and adjustable vortex light sources are needed for applying the orthogonal characteristics of vortex light with different orders. We demonstrate a tunable vortex laser based on an intra-cavity aspheric lens. By adjusting the position of the lens and the output coupler, several orders of vortex beams have been obtained at the same pump power. The spatial matching between the pump light and the modes in the cavity determines the preferentially oscillatory transverse mode. Furthermore, we compare the mode selection mechanisms in previous researches on vortex lasers, that is, the mode change caused by the thermal lens effect, and the dual feedback mechanism of the spherical lens with appreciable spherical aberration, and discuss the intrinsic similarity of these methods.

Citation Download Citation

Linghao Zhang, Kegui Xia, Jianlang Li, Aijun Zeng, and Huijie Huang "Tunable vortex laser based on intra-cavity aspheric lens", Proc. SPIE 11717, 24th National Laser Conference & Fifteenth National Conference on Laser Technology and Optoelectronics, 117171U (2 December 2020); https://doi.org/10.1117/12.2587119

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