6 kW Single Stage Narrow Linewidth Fiber Amplifier Based on the Balance Between Mode Instability and Nonlinear Effects
Single-stage high-power narrow-linewidth fiber laser has been investigated intensively recently because of its simple and robust configuration and great potential in spectral/coherent beam combination. In this work, a 6 kW narrow-linewidth fiber amplifier was experimentally achieved based...
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| Format: | Article |
| Language: | English |
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IEEE
2023-01-01
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| Series: | IEEE Photonics Journal |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/10226348/ |
| _version_ | 1797688523391762432 |
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| author | Xin Tian Binyu Rao Meng Wang Xiaoming Xi Baolai Yang Zilun Chen Hu Xiao Xiaolin Wang Pengfei Ma Zefeng Wang Jinbao Chen |
| author_facet | Xin Tian Binyu Rao Meng Wang Xiaoming Xi Baolai Yang Zilun Chen Hu Xiao Xiaolin Wang Pengfei Ma Zefeng Wang Jinbao Chen |
| author_sort | Xin Tian |
| collection | DOAJ |
| description | Single-stage high-power narrow-linewidth fiber laser has been investigated intensively recently because of its simple and robust configuration and great potential in spectral/coherent beam combination. In this work, a 6 kW narrow-linewidth fiber amplifier was experimentally achieved based on a fiber oscillator seed. By employing a few-mode ytterbium-doped fiber, the spectral broadening and SRS effects are both significantly mitigated. Combined with a wavelength-stabilized 981 nm pump source, the threshold of transverse mode instability is improved, then, a maximum output power of 6020 W at the central wavelength 1080 nm was achieved with 3-dB bandwidth of ∼0.37 nm and optical-to-optical efficiency of ∼85.6%. The mode instability and nonlinear effects were balanced well. The measured beam quality and the signal to Raman ratio were M<sup>2</sup>∼2.7 and ∼27 dB, respectively. This work shows the great potential of such amplification structure for the power scaling of high-power narrow-linewidth fiber lasers. |
| first_indexed | 2024-03-12T01:32:08Z |
| format | Article |
| id | doaj.art-515f0324342e4bcea8715f7789bbc33f |
| institution | Directory Open Access Journal |
| issn | 1943-0655 |
| language | English |
| last_indexed | 2024-03-12T01:32:08Z |
| publishDate | 2023-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj.art-515f0324342e4bcea8715f7789bbc33f2023-09-11T23:00:13ZengIEEEIEEE Photonics Journal1943-06552023-01-011551510.1109/JPHOT.2023.3307580102263486 kW Single Stage Narrow Linewidth Fiber Amplifier Based on the Balance Between Mode Instability and Nonlinear EffectsXin Tian0Binyu Rao1Meng Wang2Xiaoming Xi3https://orcid.org/0000-0002-5355-9735Baolai Yang4https://orcid.org/0000-0003-4158-3882Zilun Chen5Hu Xiao6Xiaolin Wang7Pengfei Ma8https://orcid.org/0000-0002-6146-7419Zefeng Wang9https://orcid.org/0000-0002-1383-9177Jinbao Chen10College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, ChinaSingle-stage high-power narrow-linewidth fiber laser has been investigated intensively recently because of its simple and robust configuration and great potential in spectral/coherent beam combination. In this work, a 6 kW narrow-linewidth fiber amplifier was experimentally achieved based on a fiber oscillator seed. By employing a few-mode ytterbium-doped fiber, the spectral broadening and SRS effects are both significantly mitigated. Combined with a wavelength-stabilized 981 nm pump source, the threshold of transverse mode instability is improved, then, a maximum output power of 6020 W at the central wavelength 1080 nm was achieved with 3-dB bandwidth of ∼0.37 nm and optical-to-optical efficiency of ∼85.6%. The mode instability and nonlinear effects were balanced well. The measured beam quality and the signal to Raman ratio were M<sup>2</sup>∼2.7 and ∼27 dB, respectively. This work shows the great potential of such amplification structure for the power scaling of high-power narrow-linewidth fiber lasers.https://ieeexplore.ieee.org/document/10226348/Fiber laserslaser amplifiersnonlinear effects |
| spellingShingle | Xin Tian Binyu Rao Meng Wang Xiaoming Xi Baolai Yang Zilun Chen Hu Xiao Xiaolin Wang Pengfei Ma Zefeng Wang Jinbao Chen 6 kW Single Stage Narrow Linewidth Fiber Amplifier Based on the Balance Between Mode Instability and Nonlinear Effects IEEE Photonics Journal Fiber lasers laser amplifiers nonlinear effects |
| title | 6 kW Single Stage Narrow Linewidth Fiber Amplifier Based on the Balance Between Mode Instability and Nonlinear Effects |
| title_full | 6 kW Single Stage Narrow Linewidth Fiber Amplifier Based on the Balance Between Mode Instability and Nonlinear Effects |
| title_fullStr | 6 kW Single Stage Narrow Linewidth Fiber Amplifier Based on the Balance Between Mode Instability and Nonlinear Effects |
| title_full_unstemmed | 6 kW Single Stage Narrow Linewidth Fiber Amplifier Based on the Balance Between Mode Instability and Nonlinear Effects |
| title_short | 6 kW Single Stage Narrow Linewidth Fiber Amplifier Based on the Balance Between Mode Instability and Nonlinear Effects |
| title_sort | 6 kw single stage narrow linewidth fiber amplifier based on the balance between mode instability and nonlinear effects |
| topic | Fiber lasers laser amplifiers nonlinear effects |
| url | https://ieeexplore.ieee.org/document/10226348/ |
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