High-speed modal analysis of dynamic modal coupling in fiber laser oscillator
Up till now, the spatial and temporal dynamics of transverse mode instability (TMI) in fiber laser oscillator have increasingly attracted a worldwide attention. Here, we develop a high-speed modal decomposition (MD) system to analyze the modal coupling for fiber laser oscillator above the TMI thresh...
| Main Authors: | , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-05-01
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| Series: | Frontiers in Physics |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/fphy.2023.1146208/full |
| _version_ | 1797834761907994624 |
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| author | Junyu Chai Junyu Chai Junyu Chai Wenguang Liu Wenguang Liu Wenguang Liu Xiaolin Wang Xiaolin Wang Xiaolin Wang Qiong Zhou Qiong Zhou Qiong Zhou Kun Xie Yujun Wen Yujun Wen Yujun Wen Jiangbin Zhang Jiangbin Zhang Jiangbin Zhang Pengfei Liu Pengfei Liu Pengfei Liu Hanwei Zhang Hanwei Zhang Hanwei Zhang Dan Zhang Dan Zhang Dan Zhang Zongfu Jiang Zongfu Jiang Zongfu Jiang Guomin Zhao Guomin Zhao Guomin Zhao |
| author_facet | Junyu Chai Junyu Chai Junyu Chai Wenguang Liu Wenguang Liu Wenguang Liu Xiaolin Wang Xiaolin Wang Xiaolin Wang Qiong Zhou Qiong Zhou Qiong Zhou Kun Xie Yujun Wen Yujun Wen Yujun Wen Jiangbin Zhang Jiangbin Zhang Jiangbin Zhang Pengfei Liu Pengfei Liu Pengfei Liu Hanwei Zhang Hanwei Zhang Hanwei Zhang Dan Zhang Dan Zhang Dan Zhang Zongfu Jiang Zongfu Jiang Zongfu Jiang Guomin Zhao Guomin Zhao Guomin Zhao |
| author_sort | Junyu Chai |
| collection | DOAJ |
| description | Up till now, the spatial and temporal dynamics of transverse mode instability (TMI) in fiber laser oscillator have increasingly attracted a worldwide attention. Here, we develop a high-speed modal decomposition (MD) system to analyze the modal coupling for fiber laser oscillator above the TMI threshold. A set of angular-multiplexing transmission functions (TFs) are designed for simultaneous MD and monitoring the far-field beam profile. The TMI threshold of the deployed fiber laser oscillator is 181 W at a co-pumping power (CPP) of 279 W. As the CPP increases from 318 W to 397 W, the power fluctuations of the output laser become more drastic. The changes of the far-field beam profile and the centroid of far-field spot (COFFS) indicate an increased velocity of energy transfer between modes. The high-speed MD verifies above process and analyzes the modal components, indicating that the single cycle of modal coupling decreases from 11 ms to 4 ms. Otherwise, the strong mode coupling occurs between modes with relatively large weights. The high-speed MD provides a powerful tool to research the TMI effect. |
| first_indexed | 2024-04-09T14:42:40Z |
| format | Article |
| id | doaj.art-b20cac84462d40e1b778e450fc04182f |
| institution | Directory Open Access Journal |
| issn | 2296-424X |
| language | English |
| last_indexed | 2024-04-09T14:42:40Z |
| publishDate | 2023-05-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Physics |
| spelling | doaj.art-b20cac84462d40e1b778e450fc04182f2023-05-03T04:49:20ZengFrontiers Media S.A.Frontiers in Physics2296-424X2023-05-011110.3389/fphy.2023.11462081146208High-speed modal analysis of dynamic modal coupling in fiber laser oscillatorJunyu Chai0Junyu Chai1Junyu Chai2Wenguang Liu3Wenguang Liu4Wenguang Liu5Xiaolin Wang6Xiaolin Wang7Xiaolin Wang8Qiong Zhou9Qiong Zhou10Qiong Zhou11Kun Xie12Yujun Wen13Yujun Wen14Yujun Wen15Jiangbin Zhang16Jiangbin Zhang17Jiangbin Zhang18Pengfei Liu19Pengfei Liu20Pengfei Liu21Hanwei Zhang22Hanwei Zhang23Hanwei Zhang24Dan Zhang25Dan Zhang26Dan Zhang27Zongfu Jiang28Zongfu Jiang29Zongfu Jiang30Guomin Zhao31Guomin Zhao32Guomin Zhao33College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, ChinaNanhu Laser Laboratory, National University of Defense Technology, Changsha, ChinaHunan Provincial Key Laboratory of High Energy Laser Technology, Changsha, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, ChinaNanhu Laser Laboratory, National University of Defense Technology, Changsha, ChinaHunan Provincial Key Laboratory of High Energy Laser Technology, Changsha, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, ChinaNanhu Laser Laboratory, National University of Defense Technology, Changsha, ChinaHunan Provincial Key Laboratory of High Energy Laser Technology, Changsha, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, ChinaNanhu Laser Laboratory, National University of Defense Technology, Changsha, ChinaHunan Provincial Key Laboratory of High Energy Laser Technology, Changsha, ChinaXi’an Satellite Control Center, Xi’an, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, ChinaNanhu Laser Laboratory, National University of Defense Technology, Changsha, ChinaHunan Provincial Key Laboratory of High Energy Laser Technology, Changsha, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, ChinaNanhu Laser Laboratory, National University of Defense Technology, Changsha, ChinaHunan Provincial Key Laboratory of High Energy Laser Technology, Changsha, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, ChinaNanhu Laser Laboratory, National University of Defense Technology, Changsha, ChinaHunan Provincial Key Laboratory of High Energy Laser Technology, Changsha, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, ChinaNanhu Laser Laboratory, National University of Defense Technology, Changsha, ChinaHunan Provincial Key Laboratory of High Energy Laser Technology, Changsha, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, ChinaNanhu Laser Laboratory, National University of Defense Technology, Changsha, ChinaHunan Provincial Key Laboratory of High Energy Laser Technology, Changsha, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, ChinaNanhu Laser Laboratory, National University of Defense Technology, Changsha, ChinaHunan Provincial Key Laboratory of High Energy Laser Technology, Changsha, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, ChinaNanhu Laser Laboratory, National University of Defense Technology, Changsha, ChinaHunan Provincial Key Laboratory of High Energy Laser Technology, Changsha, ChinaUp till now, the spatial and temporal dynamics of transverse mode instability (TMI) in fiber laser oscillator have increasingly attracted a worldwide attention. Here, we develop a high-speed modal decomposition (MD) system to analyze the modal coupling for fiber laser oscillator above the TMI threshold. A set of angular-multiplexing transmission functions (TFs) are designed for simultaneous MD and monitoring the far-field beam profile. The TMI threshold of the deployed fiber laser oscillator is 181 W at a co-pumping power (CPP) of 279 W. As the CPP increases from 318 W to 397 W, the power fluctuations of the output laser become more drastic. The changes of the far-field beam profile and the centroid of far-field spot (COFFS) indicate an increased velocity of energy transfer between modes. The high-speed MD verifies above process and analyzes the modal components, indicating that the single cycle of modal coupling decreases from 11 ms to 4 ms. Otherwise, the strong mode coupling occurs between modes with relatively large weights. The high-speed MD provides a powerful tool to research the TMI effect.https://www.frontiersin.org/articles/10.3389/fphy.2023.1146208/fulltransverse mode instabilitymode decompositionmodal couplingfiber laseroptical correlation filter |
| spellingShingle | Junyu Chai Junyu Chai Junyu Chai Wenguang Liu Wenguang Liu Wenguang Liu Xiaolin Wang Xiaolin Wang Xiaolin Wang Qiong Zhou Qiong Zhou Qiong Zhou Kun Xie Yujun Wen Yujun Wen Yujun Wen Jiangbin Zhang Jiangbin Zhang Jiangbin Zhang Pengfei Liu Pengfei Liu Pengfei Liu Hanwei Zhang Hanwei Zhang Hanwei Zhang Dan Zhang Dan Zhang Dan Zhang Zongfu Jiang Zongfu Jiang Zongfu Jiang Guomin Zhao Guomin Zhao Guomin Zhao High-speed modal analysis of dynamic modal coupling in fiber laser oscillator Frontiers in Physics transverse mode instability mode decomposition modal coupling fiber laser optical correlation filter |
| title | High-speed modal analysis of dynamic modal coupling in fiber laser oscillator |
| title_full | High-speed modal analysis of dynamic modal coupling in fiber laser oscillator |
| title_fullStr | High-speed modal analysis of dynamic modal coupling in fiber laser oscillator |
| title_full_unstemmed | High-speed modal analysis of dynamic modal coupling in fiber laser oscillator |
| title_short | High-speed modal analysis of dynamic modal coupling in fiber laser oscillator |
| title_sort | high speed modal analysis of dynamic modal coupling in fiber laser oscillator |
| topic | transverse mode instability mode decomposition modal coupling fiber laser optical correlation filter |
| url | https://www.frontiersin.org/articles/10.3389/fphy.2023.1146208/full |
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