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Hollow-core fiber gas lasers [Invited]
Zefeng Wang1,2,3, Wenxi Pei4,5, Zhiyue Zhou4,5,6
1College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, 410073, China. zefengwang_nudt@163.com.
Light, Science & Applications
|April 20, 2026
Summary
Advancements in hollow-core fiber gas lasers (HCFGLs) leverage novel fiber designs for efficient light amplification. These lasers offer broadband emission and high power, paving the way for diverse applications.
Area of Science:
- Photonics and Laser Technology
- Optical Fiber Communications
- Materials Science
Background:
- Hollow-core fiber gas lasers (HCFGLs) have rapidly advanced due to improvements in hollow-core fiber (HCF) technology.
- The unique hollow-core structure provides an extended light-gas interaction region, enhancing laser performance.
Purpose of the Study:
- To review the fundamental principles and recent research progress in HCFGLs.
- To provide insights into the historical development and future trends of HCFGLs.
Main Methods:
- Review of historical development of HCFs and HCFGLs.
- Detailed introduction to HCFGLs based on population inversion and stimulated Raman scattering.
- Analysis of power enhancement, spectral expansion, and application potential.
Main Results:
- HCFGLs demonstrate broadband emission from UV to mid-infrared (MIR), with record output >4.8 μm.
- Output power exceeds 100 W in the near-infrared and 21.8 W in the MIR.
- Reduced HCF attenuation, especially in the MIR, enhances potential applications.
Conclusions:
- HCFGLs offer high efficiency, beam quality, and tunability.
- Continued HCF development promises expanded applications in sensing, communication, medicine, and defense.
- Future research focuses on increasing power, broadening spectra, and realizing practical applications.
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