ORIGINAL RESEARCH article
Front. Phys.
Sec. Optics and Photonics
Volume 13 - 2025 | doi: 10.3389/fphy.2025.1618958
This article is part of the Research TopicAdvanced High Power Solid-State Laser Technology, Volume IIView all 4 articles
Passively Q-Switched 2.79-μm Er, Cr: YSGG Laser Based on Pure Water Saturable Absorber
Provisionally accepted
- 1University of Science and Technology of China, Hefei, China
- 2Institute of Health and Medical Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences (CAS), Hefei, Anhui Province, China
- 3School of Biomedical Engineering, Anhui Medical University, Hefei, Anhui Province, China
- 4Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences (CAS), Hefei, Anhui Province, China
Select one of your emails
You have multiple emails registered with Frontiers:
Notify me on publication
Please enter your email address:
If you already have an account, please login
You don't have a Frontiers account ? You can register here
Exploring suitable saturable absorber materials for the 2.79 μm waveband is always a focus in passive Q-switching laser technology. Pure water exhibits excellent fluidity, high chemical stability, and outstanding thermal properties; notably, its recovery capability suggests it could serve as an effective saturable absorber. This study validates the feasibility of saturable absorption with absorption darkening at 2.79 μm, analyzing the saturation absorption mechanism of water and the origin of absorption darkening. By designing a device to control the thickness of micron-scale water layers, controllable outputs of Q-switched single pulses and multipulses with microsecond intervals were achieved in a 2.79 μm Er, Cr: YSGG laser. With a water layer thickness of 7 μm and a repetition rate of 20 Hz, the maximum energy of the multipulse output reached 0.78 mJ, and the shortest single-pulse width was 286 ns. This provides a reference for the application of pure water as a saturable absorber and for the study of other hydroxyl-based saturable absorber materials.
Keywords: Solid state laser, Q-switched, Er,Cr:YSGG laser, saturable absorber, Mid infrared
Received: 27 Apr 2025; Accepted: 27 Jun 2025.
Copyright: © 2025 Wang, Huang, Kong, Zhang, Tingqing, Wang and Jiang. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence:
Li Wang, University of Science and Technology of China, Hefei, China
Haihe Jiang, University of Science and Technology of China, Hefei, China
Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.