Influence of Pump Current Waveform on The Mitigation of Transverse Mode Instability in Fiber Laser Oscillator
We carry out a detailed investigation of TMI mitigation by pump modulation based on multiple current waveforms in a fiber laser oscillator. Compared with continuous wave (CW), the modulation of various waveforms, including sinusoidal wave, triangular wave, and pulse wave with a duty cycle of 50% and...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-04-01
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| Series: | Micromachines |
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| Online Access: | https://www.mdpi.com/2072-666X/14/4/864 |
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| author | Junyu Chai Wenguang Liu Xiaolin Wang Qiong Zhou Jiangbin Zhang Hanwei Zhang Pengfei Liu Yao Lu Dan Zhang Zongfu Jiang Guomin Zhao |
| author_facet | Junyu Chai Wenguang Liu Xiaolin Wang Qiong Zhou Jiangbin Zhang Hanwei Zhang Pengfei Liu Yao Lu Dan Zhang Zongfu Jiang Guomin Zhao |
| author_sort | Junyu Chai |
| collection | DOAJ |
| description | We carry out a detailed investigation of TMI mitigation by pump modulation based on multiple current waveforms in a fiber laser oscillator. Compared with continuous wave (CW), the modulation of various waveforms, including sinusoidal wave, triangular wave, and pulse wave with a duty cycle of 50% and 60%, can increase the TMI threshold. The average output power of a stabilized beam is boosted via the adjustment of phase difference between the signal channels. The TMI threshold is increased to 270 W under a modulation of pulse wave (duty cycle: 60%) with a phase difference of 440 μs, where the beam quality is 1.45. This threshold can be further improved by adding groups of pump LDs and drivers, which is a promising approach for beam stabilization of high-power fiber lasers. |
| first_indexed | 2024-03-11T04:43:25Z |
| format | Article |
| id | doaj.art-434f6ee398194d0cb1d21beda6f996c7 |
| institution | Directory Open Access Journal |
| issn | 2072-666X |
| language | English |
| last_indexed | 2024-03-11T04:43:25Z |
| publishDate | 2023-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Micromachines |
| spelling | doaj.art-434f6ee398194d0cb1d21beda6f996c72023-11-17T20:30:28ZengMDPI AGMicromachines2072-666X2023-04-0114486410.3390/mi14040864Influence of Pump Current Waveform on The Mitigation of Transverse Mode Instability in Fiber Laser OscillatorJunyu Chai0Wenguang Liu1Xiaolin Wang2Qiong Zhou3Jiangbin Zhang4Hanwei Zhang5Pengfei Liu6Yao Lu7Dan Zhang8Zongfu Jiang9Guomin Zhao10College 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, ChinaWe carry out a detailed investigation of TMI mitigation by pump modulation based on multiple current waveforms in a fiber laser oscillator. Compared with continuous wave (CW), the modulation of various waveforms, including sinusoidal wave, triangular wave, and pulse wave with a duty cycle of 50% and 60%, can increase the TMI threshold. The average output power of a stabilized beam is boosted via the adjustment of phase difference between the signal channels. The TMI threshold is increased to 270 W under a modulation of pulse wave (duty cycle: 60%) with a phase difference of 440 μs, where the beam quality is 1.45. This threshold can be further improved by adding groups of pump LDs and drivers, which is a promising approach for beam stabilization of high-power fiber lasers.https://www.mdpi.com/2072-666X/14/4/864transverse mode instabilitypump modulationcurrent waveformfiber laser oscillator |
| spellingShingle | Junyu Chai Wenguang Liu Xiaolin Wang Qiong Zhou Jiangbin Zhang Hanwei Zhang Pengfei Liu Yao Lu Dan Zhang Zongfu Jiang Guomin Zhao Influence of Pump Current Waveform on The Mitigation of Transverse Mode Instability in Fiber Laser Oscillator Micromachines transverse mode instability pump modulation current waveform fiber laser oscillator |
| title | Influence of Pump Current Waveform on The Mitigation of Transverse Mode Instability in Fiber Laser Oscillator |
| title_full | Influence of Pump Current Waveform on The Mitigation of Transverse Mode Instability in Fiber Laser Oscillator |
| title_fullStr | Influence of Pump Current Waveform on The Mitigation of Transverse Mode Instability in Fiber Laser Oscillator |
| title_full_unstemmed | Influence of Pump Current Waveform on The Mitigation of Transverse Mode Instability in Fiber Laser Oscillator |
| title_short | Influence of Pump Current Waveform on The Mitigation of Transverse Mode Instability in Fiber Laser Oscillator |
| title_sort | influence of pump current waveform on the mitigation of transverse mode instability in fiber laser oscillator |
| topic | transverse mode instability pump modulation current waveform fiber laser oscillator |
| url | https://www.mdpi.com/2072-666X/14/4/864 |
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