Theoretical and Experimental Study of High-Peak-Power High-Brightness Quasi-CW Fiber Laser
The main factors limiting the power scaling of high-peak-power high-brightness quasi-continuous wave (QCW) fiber laser oscillator and a possible solution are analyzed in this paper. The impacts of fiber length and grating parameters on the output power are studied by rate equations. Under the optimi...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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IEEE
2022-01-01
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| Series: | IEEE Photonics Journal |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/9772250/ |
| _version_ | 1817980040675065856 |
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| author | Li Wang Hanwei Zhang Peng Wang Baolai Yang Xiaolin Wang Yu Ning Xiaojun Xu |
| author_facet | Li Wang Hanwei Zhang Peng Wang Baolai Yang Xiaolin Wang Yu Ning Xiaojun Xu |
| author_sort | Li Wang |
| collection | DOAJ |
| description | The main factors limiting the power scaling of high-peak-power high-brightness quasi-continuous wave (QCW) fiber laser oscillator and a possible solution are analyzed in this paper. The impacts of fiber length and grating parameters on the output power are studied by rate equations. Under the optimized parameters, a high-brightness QCW fiber laser oscillator with a peak power of 7.3 kW is presented experimentally by using a 24 meter long spindle-shaped Yb-doped fiber with a constant core cladding ratio, and that is the best performance of peak power and brightness in near-single-mode QCW fiber lasers at present to the best of our knowledge. The corresponding pulse energy is 0.57 J and the beam quality <italic>M<sup>2</sup></italic> factor is about 1.43 under the condition of repetition frequency of 1 kHz and pulse width of 100 μs. The details are analyzed, and also the limiting factors of further power scaling, strategies of suppressing nonlinear effects and the principle of optical device parameter optimization. |
| first_indexed | 2024-04-13T22:49:36Z |
| format | Article |
| id | doaj.art-a483314c031940cea77449c7c6aa1817 |
| institution | Directory Open Access Journal |
| issn | 1943-0655 |
| language | English |
| last_indexed | 2024-04-13T22:49:36Z |
| publishDate | 2022-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj.art-a483314c031940cea77449c7c6aa18172022-12-22T02:26:16ZengIEEEIEEE Photonics Journal1943-06552022-01-011431610.1109/JPHOT.2022.31739929772250Theoretical and Experimental Study of High-Peak-Power High-Brightness Quasi-CW Fiber LaserLi Wang0https://orcid.org/0000-0002-9979-1708Hanwei Zhang1https://orcid.org/0000-0001-9880-811XPeng Wang2https://orcid.org/0000-0001-9938-5577Baolai Yang3https://orcid.org/0000-0003-4158-3882Xiaolin Wang4Yu Ning5Xiaojun Xu6College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, Hunan, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, Hunan, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, Hunan, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, Hunan, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, Hunan, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, Hunan, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, Hunan, ChinaThe main factors limiting the power scaling of high-peak-power high-brightness quasi-continuous wave (QCW) fiber laser oscillator and a possible solution are analyzed in this paper. The impacts of fiber length and grating parameters on the output power are studied by rate equations. Under the optimized parameters, a high-brightness QCW fiber laser oscillator with a peak power of 7.3 kW is presented experimentally by using a 24 meter long spindle-shaped Yb-doped fiber with a constant core cladding ratio, and that is the best performance of peak power and brightness in near-single-mode QCW fiber lasers at present to the best of our knowledge. The corresponding pulse energy is 0.57 J and the beam quality <italic>M<sup>2</sup></italic> factor is about 1.43 under the condition of repetition frequency of 1 kHz and pulse width of 100 μs. The details are analyzed, and also the limiting factors of further power scaling, strategies of suppressing nonlinear effects and the principle of optical device parameter optimization.https://ieeexplore.ieee.org/document/9772250/Fiber lasersytterbiumhigh-power fiber lasers (HPFL)quasi-continuous wave (QCW)near-single-mode |
| spellingShingle | Li Wang Hanwei Zhang Peng Wang Baolai Yang Xiaolin Wang Yu Ning Xiaojun Xu Theoretical and Experimental Study of High-Peak-Power High-Brightness Quasi-CW Fiber Laser IEEE Photonics Journal Fiber lasers ytterbium high-power fiber lasers (HPFL) quasi-continuous wave (QCW) near-single-mode |
| title | Theoretical and Experimental Study of High-Peak-Power High-Brightness Quasi-CW Fiber Laser |
| title_full | Theoretical and Experimental Study of High-Peak-Power High-Brightness Quasi-CW Fiber Laser |
| title_fullStr | Theoretical and Experimental Study of High-Peak-Power High-Brightness Quasi-CW Fiber Laser |
| title_full_unstemmed | Theoretical and Experimental Study of High-Peak-Power High-Brightness Quasi-CW Fiber Laser |
| title_short | Theoretical and Experimental Study of High-Peak-Power High-Brightness Quasi-CW Fiber Laser |
| title_sort | theoretical and experimental study of high peak power high brightness quasi cw fiber laser |
| topic | Fiber lasers ytterbium high-power fiber lasers (HPFL) quasi-continuous wave (QCW) near-single-mode |
| url | https://ieeexplore.ieee.org/document/9772250/ |
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