High-Performance 1.5 μm Hollow-Core Fiber Gas Raman Laser Amplifier Enabled by Seed Injection
We demonstrate a 1.5 μm methane-filled hollow-core fiber (HCF) amplifier that delivers 7.1 W of narrow-linewidth (<0.1 nm), near-diffraction-limited (M2 < 1.2) pulsed Raman output. The system is pumped by a 1064 nm pulsed fiber laser and amplifies a 1543 nm continuous-wave seed via stimulated Raman scattering in methane. Using a 45-m HCF, we systematically investigated the influence of seed injection on key laser characteristics, covering the spectral profile, power scaling, and beam properties. This work provides an effective strategy for realizing high-performance fiber lasers in the 1.5 μm band.
Authors
- Peicong Liu
- Zhiyue Zhou (ORCID: https://orcid.org/0000-0002-4706-7064)
- Wenxi Pei
- Luohao Lei
- Tianyu Li (ORCID: https://orcid.org/0000-0001-8470-8943)
- Zefeng Wang (ORCID: https://orcid.org/0000-0002-5044-5150)
- Shuyi Wang
Institutions
- National University of Defense Technology (CN)
Publication Details
- Journal
- Photonics
- Published
- 2025-11-28
- DOI
- https://doi.org/10.3390/photonics12121172
- Primary Topic
- Photonic Crystal and Fiber Optics
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- National Natural Science Foundation of China
- National University of Defense Technology