An alignment-free laser based on cat-eye retroreflectors

Jingni Geng; Quan Sheng; Shijie Fu; Wei Shi; Jianquan Yao

doi:10.1117/12.2685438

27 November 2023 An alignment-free laser based on cat-eye retroreflectors

Jingni Geng, Quan Sheng, Shijie Fu, Wei Shi, Jianquan Yao

Proceedings Volume 12760, Advanced Lasers, High-Power Lasers, and Applications XIV; 127600O (2023) https://doi.org/10.1117/12.2685438
Event: SPIE/COS Photonics Asia, 2023, Beijing, China

Abstract

Using retroreflectors in the laser cavity can enlarge the laser misalignment tolerance significantly and even realize alignment-free operation over a dynamic range. We summarized the optimization criteria for the alignment-free laser with the scheme including several Cat-Eyes Retroreflectors (CER). The telescope system and coupled-resonator scheme were utilized to alleviate the beam divergence over the long working distance and decrease the laser intensity on the optical path between the transmitter and receiver to improve laser safety, respectively. Through theoretical analysis, we recognized that two types of serious aberrations, spherical aberration and field curvature, were the essential factors that limited the laser operation dynamic range. After meticulous optical design to compensate the aberrations, a working distance range of 1 m to 5 m with over 5 W output power was demonstrated. Meanwhile, a receiver field of view (FoV) of ±30° and a transmitter FoV of 4.6° (corresponding to the receiver transverse movement of 40 cm) at a 5 m working distance were also obtained with multi-watt power output. We experimentally realized efficient laser operation over a large dynamic range, which paves the way for laser adaptive wireless power transfer/communication applications.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Jingni Geng, Quan Sheng, Shijie Fu, Wei Shi, and Jianquan Yao "An alignment-free laser based on cat-eye retroreflectors", Proc. SPIE 12760, Advanced Lasers, High-Power Lasers, and Applications XIV, 127600O (27 November 2023); https://doi.org/10.1117/12.2685438

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KEYWORDS

Receivers

Transmitters

Retroreflectors

Laser resonators

Laser safety

Laser applications

Beam path

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