Femtosecond laser fabrication of large-core fiber Bragg gratings for high-power fiber oscillators
In this paper, a fs-laser phase mask inscription system based on a galvanometer scanning strategy is designed and set up for the fabrication of large-core fiber Bragg gratings (FBGs). Based on this setup, a homogeneous cross-sectional refractive index modulation can be achieved in the core of a larg...
| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
AIP Publishing LLC
2023-04-01
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| Series: | APL Photonics |
| Online Access: | http://dx.doi.org/10.1063/5.0130238 |
| _version_ | 1797772828705030144 |
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| author | Hao Li Baolai Yang Meng Wang Chenhui Gao Baiyi Wu Lingfa Zeng Xiaoming Xi Zilun Chen Xiaolin Wang Zefeng Wang Jinbao Chen |
| author_facet | Hao Li Baolai Yang Meng Wang Chenhui Gao Baiyi Wu Lingfa Zeng Xiaoming Xi Zilun Chen Xiaolin Wang Zefeng Wang Jinbao Chen |
| author_sort | Hao Li |
| collection | DOAJ |
| description | In this paper, a fs-laser phase mask inscription system based on a galvanometer scanning strategy is designed and set up for the fabrication of large-core fiber Bragg gratings (FBGs). Based on this setup, a homogeneous cross-sectional refractive index modulation can be achieved in the core of a large-mode-area fiber, and a pair of FBGs are fabricated in fibers with a core diameter of 30 µm. To investigate the performance of the fabricated FBGs, a high power all-fiber oscillator is built using a pure backward pumping structure. The FBGs work well, and the maximum output power of 7920 W is achieved with an optical–optical conversion efficiency of 77.3%. To the best of our knowledge, this is the highest power of all-fiber oscillators based on fs-written FBGs. This work provides a flexible, stable, and economic scanning strategy for large-core FBG inscription and exhibits excellent performance for high power fiber lasers. |
| first_indexed | 2024-03-12T21:57:32Z |
| format | Article |
| id | doaj.art-eb2d1ce7f1c246889d90b3f5f6e26f3b |
| institution | Directory Open Access Journal |
| issn | 2378-0967 |
| language | English |
| last_indexed | 2024-03-12T21:57:32Z |
| publishDate | 2023-04-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | APL Photonics |
| spelling | doaj.art-eb2d1ce7f1c246889d90b3f5f6e26f3b2023-07-25T15:16:16ZengAIP Publishing LLCAPL Photonics2378-09672023-04-0184046101046101-810.1063/5.0130238Femtosecond laser fabrication of large-core fiber Bragg gratings for high-power fiber oscillatorsHao Li0Baolai Yang1Meng Wang2Chenhui Gao3Baiyi Wu4Lingfa Zeng5Xiaoming Xi6Zilun Chen7Xiaolin Wang8Zefeng Wang9Jinbao Chen10College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, ChinaIn this paper, a fs-laser phase mask inscription system based on a galvanometer scanning strategy is designed and set up for the fabrication of large-core fiber Bragg gratings (FBGs). Based on this setup, a homogeneous cross-sectional refractive index modulation can be achieved in the core of a large-mode-area fiber, and a pair of FBGs are fabricated in fibers with a core diameter of 30 µm. To investigate the performance of the fabricated FBGs, a high power all-fiber oscillator is built using a pure backward pumping structure. The FBGs work well, and the maximum output power of 7920 W is achieved with an optical–optical conversion efficiency of 77.3%. To the best of our knowledge, this is the highest power of all-fiber oscillators based on fs-written FBGs. This work provides a flexible, stable, and economic scanning strategy for large-core FBG inscription and exhibits excellent performance for high power fiber lasers.http://dx.doi.org/10.1063/5.0130238 |
| spellingShingle | Hao Li Baolai Yang Meng Wang Chenhui Gao Baiyi Wu Lingfa Zeng Xiaoming Xi Zilun Chen Xiaolin Wang Zefeng Wang Jinbao Chen Femtosecond laser fabrication of large-core fiber Bragg gratings for high-power fiber oscillators APL Photonics |
| title | Femtosecond laser fabrication of large-core fiber Bragg gratings for high-power fiber oscillators |
| title_full | Femtosecond laser fabrication of large-core fiber Bragg gratings for high-power fiber oscillators |
| title_fullStr | Femtosecond laser fabrication of large-core fiber Bragg gratings for high-power fiber oscillators |
| title_full_unstemmed | Femtosecond laser fabrication of large-core fiber Bragg gratings for high-power fiber oscillators |
| title_short | Femtosecond laser fabrication of large-core fiber Bragg gratings for high-power fiber oscillators |
| title_sort | femtosecond laser fabrication of large core fiber bragg gratings for high power fiber oscillators |
| url | http://dx.doi.org/10.1063/5.0130238 |
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