Functional Yb-doped fiber with a bat-type refractive index distribution for beyond kilowatt all-fiber single-frequency laser amplification
Abstract High-power single-frequency fiber lasers with diffraction-limited spots are indispensable for a wide range of photonic applications and are particularly in advanced detection and sensing technologies. However, the simultaneous achievement of kilowatt-level output power and diffraction-limit...
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| Format: | Article |
| Language: | English |
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Nature Publishing Group
2025-08-01
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| Series: | Light: Science & Applications |
| Online Access: | https://doi.org/10.1038/s41377-025-01956-1 |
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| author | Wei Li Wei Liu Yu Deng Yisha Chen Huan Yang Qi Chen Junjie Zheng Hu Xiao Zilun Chen Zhiyong Pan Pengfei Ma Zefeng Wang Lei Si Shanhui Xu Jinbao Chen |
| author_facet | Wei Li Wei Liu Yu Deng Yisha Chen Huan Yang Qi Chen Junjie Zheng Hu Xiao Zilun Chen Zhiyong Pan Pengfei Ma Zefeng Wang Lei Si Shanhui Xu Jinbao Chen |
| author_sort | Wei Li |
| collection | DOAJ |
| description | Abstract High-power single-frequency fiber lasers with diffraction-limited spots are indispensable for a wide range of photonic applications and are particularly in advanced detection and sensing technologies. However, the simultaneous achievement of kilowatt-level output power and diffraction-limited beam quality has remained elusive in all reported single-frequency fiber laser systems to date, primarily due to limitations imposed by the stimulated Brillouin scattering (SBS) effect and transverse mode instability (TMI) effect. In this study, we demonstrate the design and manufacturing of an ultra-low numerical aperture (NA) functional Yb-doped fiber featuring a bat-type refractive index distribution, specifically engineered for single-frequency laser amplification. In the fabrication, we implemented multiple chelate gas filling and particle deposition iterations, leading to an active fiber with a bat-type refractive index distribution. The unique capabilities of this large mode area and high-order modes leakage fiber (HOMLF) were demonstrated by stably amplifying the single-frequency laser with more than one kilowatt output power and near single mode beam quality (Mx 2 = 1.10, Mx 2 = 1.18) for the first time. This fiber design advances the leap forward in single-frequency fiber lasers, which could contribute as a novel and efficient laser amplification technique for the next generation of gravitational wave detection systems. |
| format | Article |
| id | doaj-art-c8c29880caa043959e3b99a349640413 |
| institution | Kabale University |
| issn | 2047-7538 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Nature Publishing Group |
| record_format | Article |
| series | Light: Science & Applications |
| spelling | doaj-art-c8c29880caa043959e3b99a3496404132025-08-20T03:46:27ZengNature Publishing GroupLight: Science & Applications2047-75382025-08-011411910.1038/s41377-025-01956-1Functional Yb-doped fiber with a bat-type refractive index distribution for beyond kilowatt all-fiber single-frequency laser amplificationWei Li0Wei Liu1Yu Deng2Yisha Chen3Huan Yang4Qi Chen5Junjie Zheng6Hu Xiao7Zilun Chen8Zhiyong Pan9Pengfei Ma10Zefeng Wang11Lei Si12Shanhui Xu13Jinbao Chen14College of Advanced Interdisciplinary Studies, National University of Defense TechnologyCollege of Advanced Interdisciplinary Studies, National University of Defense TechnologyCollege of Advanced Interdisciplinary Studies, National University of Defense TechnologyCollege of Advanced Interdisciplinary Studies, National University of Defense TechnologyCollege of Advanced Interdisciplinary Studies, National University of Defense TechnologyCollege of Advanced Interdisciplinary Studies, National University of Defense TechnologySchool of Physics and Optoelectronics, South China University of TechnologyCollege of Advanced Interdisciplinary Studies, National University of Defense TechnologyCollege of Advanced Interdisciplinary Studies, National University of Defense TechnologyCollege of Advanced Interdisciplinary Studies, National University of Defense TechnologyCollege of Advanced Interdisciplinary Studies, National University of Defense TechnologyCollege of Advanced Interdisciplinary Studies, National University of Defense TechnologyCollege of Advanced Interdisciplinary Studies, National University of Defense TechnologySchool of Physics and Optoelectronics, South China University of TechnologyCollege of Advanced Interdisciplinary Studies, National University of Defense TechnologyAbstract High-power single-frequency fiber lasers with diffraction-limited spots are indispensable for a wide range of photonic applications and are particularly in advanced detection and sensing technologies. However, the simultaneous achievement of kilowatt-level output power and diffraction-limited beam quality has remained elusive in all reported single-frequency fiber laser systems to date, primarily due to limitations imposed by the stimulated Brillouin scattering (SBS) effect and transverse mode instability (TMI) effect. In this study, we demonstrate the design and manufacturing of an ultra-low numerical aperture (NA) functional Yb-doped fiber featuring a bat-type refractive index distribution, specifically engineered for single-frequency laser amplification. In the fabrication, we implemented multiple chelate gas filling and particle deposition iterations, leading to an active fiber with a bat-type refractive index distribution. The unique capabilities of this large mode area and high-order modes leakage fiber (HOMLF) were demonstrated by stably amplifying the single-frequency laser with more than one kilowatt output power and near single mode beam quality (Mx 2 = 1.10, Mx 2 = 1.18) for the first time. This fiber design advances the leap forward in single-frequency fiber lasers, which could contribute as a novel and efficient laser amplification technique for the next generation of gravitational wave detection systems.https://doi.org/10.1038/s41377-025-01956-1 |
| spellingShingle | Wei Li Wei Liu Yu Deng Yisha Chen Huan Yang Qi Chen Junjie Zheng Hu Xiao Zilun Chen Zhiyong Pan Pengfei Ma Zefeng Wang Lei Si Shanhui Xu Jinbao Chen Functional Yb-doped fiber with a bat-type refractive index distribution for beyond kilowatt all-fiber single-frequency laser amplification Light: Science & Applications |
| title | Functional Yb-doped fiber with a bat-type refractive index distribution for beyond kilowatt all-fiber single-frequency laser amplification |
| title_full | Functional Yb-doped fiber with a bat-type refractive index distribution for beyond kilowatt all-fiber single-frequency laser amplification |
| title_fullStr | Functional Yb-doped fiber with a bat-type refractive index distribution for beyond kilowatt all-fiber single-frequency laser amplification |
| title_full_unstemmed | Functional Yb-doped fiber with a bat-type refractive index distribution for beyond kilowatt all-fiber single-frequency laser amplification |
| title_short | Functional Yb-doped fiber with a bat-type refractive index distribution for beyond kilowatt all-fiber single-frequency laser amplification |
| title_sort | functional yb doped fiber with a bat type refractive index distribution for beyond kilowatt all fiber single frequency laser amplification |
| url | https://doi.org/10.1038/s41377-025-01956-1 |
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