Affiliation:
1. Qufu Normal University
2. Weifang Academy of Advanced Opto-Electronic Circuits
3. Institute of Semiconductors, Chinese Academy of Sciences
4. University of Chinese Academy of Sciences
5. Weifang University
Abstract
High-power and high-beam-quality laser sources are required in numerous applications. Here, we theoretically investigate a tapered laser diode with integrated metalens, which can improve the lateral beam quality. By carefully designing the slot length and width at different lateral positions behind the front facet, the mode mismatch between the ridged cavity and the tapered cavity is overcome while ensuring high transmittance (>96%). The beam quality is greatly improved, and the lateral far-field divergence is reduced. The simulation results show that the lateral far-field divergence (second-moment level) decreases from 7.2° to 5.9°, and the M2 (second-moment level) decreases from 2.3 to 1.2. The proposed structure shows a good thermal stability in the simulation.
Funder
National Key Research and Development Program of China
National Natural Science Foundation of China
Key-Area Research and Development Program of Guangdong Province
Key Research and Development Program of Shandong Province
Shandong Advanced Optoelectronic Chip Innovation and Entrepreneurship Community Project
Subject
Atomic and Molecular Physics, and Optics,Statistical and Nonlinear Physics