https://doi.org/10.1051/epjconf/202430912003
Bicolor Bessel beams generator based on single-mode fiber for STED system light source
1 Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province, School of Engineering, Westlake University, Hangzhou 310024, China
2 Westlake Institute for Optoelectronics, Fuyang, Hangzhou 311421, China
3 Institute of Advanced Technology, Westlake Institute for Advanced Study. Hangzhou 310024, China
* Corresponding author: lixijun@westlake.edu.cn, qiu_lab@westlake.edu.cn
Published online: 31 October 2024
In this paper, we have presented a novel and compact bicolor Bessel beams (bi-BBs) generator based on a single-mode fiber integrated with an axicon-like microstructure (AM). The proposed design utilized two Bessel beams manifested as pump beam of circular distribution at λ=405 nm and STED beam of donut distribution at λ=532 nm. Through numerical simulations, the influence of the AM size variance on the characteristics of bi-BBs was investigated and a type of AMs has been found to support STED beam. By controlling and optimizing the characteristics of bi-BBs emitted from a single-mode fiber greatly reduces the coaxial alignment difficulty of the free space STED systems and provides a new way to achieve mirrorless STED super-resolution systems.
© The Authors, published by EDP Sciences, 2024
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
