Bend Distortion and Thermal Lensing Effect on Transverse Mode Instability
In this work, we conducted a numerical analysis to investigate the combined effect of thermal lensing and bending-induced mode distortion on transverse mode instability in conventional large-mode-area (LMA) step-index fibers. Utilizing the finite element method, conformal mapping, and thermal conduc...
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| Language: | English |
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MDPI AG
2024-11-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/11/12/1104 |
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| author | Dan Cheng Qing Zhong Yujun Feng Kun Zhang Zhaochen Cheng Dayong Zhang Hong Zhao |
| author_facet | Dan Cheng Qing Zhong Yujun Feng Kun Zhang Zhaochen Cheng Dayong Zhang Hong Zhao |
| author_sort | Dan Cheng |
| collection | DOAJ |
| description | In this work, we conducted a numerical analysis to investigate the combined effect of thermal lensing and bending-induced mode distortion on transverse mode instability in conventional large-mode-area (LMA) step-index fibers. Utilizing the finite element method, conformal mapping, and thermal conduction equations, we simulated the mode profiles in LMA 20/400 and 25/400 fibers subjected to both bending and thermal lensing effects; the corresponding evolution of mode loss and effective area were explored as well. Additionally, by introducing the derived mode profiles to the TMI coefficient calculations, we analyzed the influence of bending and thermal lensing (TL) on TMI; the simulation results indicate that the mode distortion caused by bending and the TL effect, under the bending conditions commonly encountered in practice, do not have pronounced impacts on TMI coefficient and TMI threshold. |
| format | Article |
| id | doaj-art-dfa9173659a84debbb231c3a062b848f |
| institution | Kabale University |
| issn | 2304-6732 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj-art-dfa9173659a84debbb231c3a062b848f2024-12-27T14:47:04ZengMDPI AGPhotonics2304-67322024-11-011112110410.3390/photonics11121104Bend Distortion and Thermal Lensing Effect on Transverse Mode InstabilityDan Cheng0Qing Zhong1Yujun Feng2Kun Zhang3Zhaochen Cheng4Dayong Zhang5Hong Zhao6No.11th Research Institute of China Electronics Technology Group Corporation, Science and Technology on Solid-State Laser Laboratory, Beijing 100061, ChinaGraduate School of China Academy of Engineering Physics, Beijing 100088, ChinaInstitute of Applied Electronics, China Academy of Engineering Physics (CAEP), Mianyang 621900, ChinaNo.11th Research Institute of China Electronics Technology Group Corporation, Science and Technology on Solid-State Laser Laboratory, Beijing 100061, ChinaNo.11th Research Institute of China Electronics Technology Group Corporation, Science and Technology on Solid-State Laser Laboratory, Beijing 100061, ChinaNo.11th Research Institute of China Electronics Technology Group Corporation, Science and Technology on Solid-State Laser Laboratory, Beijing 100061, ChinaNo.11th Research Institute of China Electronics Technology Group Corporation, Science and Technology on Solid-State Laser Laboratory, Beijing 100061, ChinaIn this work, we conducted a numerical analysis to investigate the combined effect of thermal lensing and bending-induced mode distortion on transverse mode instability in conventional large-mode-area (LMA) step-index fibers. Utilizing the finite element method, conformal mapping, and thermal conduction equations, we simulated the mode profiles in LMA 20/400 and 25/400 fibers subjected to both bending and thermal lensing effects; the corresponding evolution of mode loss and effective area were explored as well. Additionally, by introducing the derived mode profiles to the TMI coefficient calculations, we analyzed the influence of bending and thermal lensing (TL) on TMI; the simulation results indicate that the mode distortion caused by bending and the TL effect, under the bending conditions commonly encountered in practice, do not have pronounced impacts on TMI coefficient and TMI threshold.https://www.mdpi.com/2304-6732/11/12/1104transverse mode instabilitythermal lensingmode distortion |
| spellingShingle | Dan Cheng Qing Zhong Yujun Feng Kun Zhang Zhaochen Cheng Dayong Zhang Hong Zhao Bend Distortion and Thermal Lensing Effect on Transverse Mode Instability Photonics transverse mode instability thermal lensing mode distortion |
| title | Bend Distortion and Thermal Lensing Effect on Transverse Mode Instability |
| title_full | Bend Distortion and Thermal Lensing Effect on Transverse Mode Instability |
| title_fullStr | Bend Distortion and Thermal Lensing Effect on Transverse Mode Instability |
| title_full_unstemmed | Bend Distortion and Thermal Lensing Effect on Transverse Mode Instability |
| title_short | Bend Distortion and Thermal Lensing Effect on Transverse Mode Instability |
| title_sort | bend distortion and thermal lensing effect on transverse mode instability |
| topic | transverse mode instability thermal lensing mode distortion |
| url | https://www.mdpi.com/2304-6732/11/12/1104 |
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