Thermally Induced Mode Amplification Characteristics of Large Mode Area Segmented Cladding Fiber
A model of amplifier based on large mode area (LMA) segmented cladding fiber (SCF) is proposed. High order modes (HOMs) filtering effect and thermal-induced modal evolution characteristics are theoretically investigated by the few-mode steady state rate equations and heat conduction equation. Simula...
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| Format: | Article |
| Language: | English |
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IEEE
2021-01-01
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| Series: | IEEE Photonics Journal |
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| Online Access: | https://ieeexplore.ieee.org/document/9321388/ |
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| author | Caijian Xie Tigang Ning Jingjing Zheng Jing Li Xiaowei Dong Yanbiao Chang Li Pei |
| author_facet | Caijian Xie Tigang Ning Jingjing Zheng Jing Li Xiaowei Dong Yanbiao Chang Li Pei |
| author_sort | Caijian Xie |
| collection | DOAJ |
| description | A model of amplifier based on large mode area (LMA) segmented cladding fiber (SCF) is proposed. High order modes (HOMs) filtering effect and thermal-induced modal evolution characteristics are theoretically investigated by the few-mode steady state rate equations and heat conduction equation. Simulation results show that an amplifier based on ytterbium doped SCF presents much better HOMs suppression and mode beam quality than the amplifier based on conventional step-index fiber when achieving single-mode operation by coiling fiber. Furthermore, heat load generating in the core of ytterbium doped SCF can change the pre-designed refractive index profile through the thermo-optic effect, which induces evolution of mode amplification characteristics, including mode loss decreasing and mode area shrinking. And the co-pumping amplifier ytterbium doped SCF is more advantageous to get large mode area of fundamental mode at the output end, while single-mode operation is achieved much more effectively in the counter-pumping amplifier. These results can provide guidance in the design of high-power single-mode fiber amplifier based on rare-earth doped LMA-SCF. |
| format | Article |
| id | doaj-art-403e988ff75a43cd9cd9f4225b746940 |
| institution | OA Journals |
| issn | 1943-0655 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj-art-403e988ff75a43cd9cd9f4225b7469402025-08-20T02:38:10ZengIEEEIEEE Photonics Journal1943-06552021-01-0113211210.1109/JPHOT.2021.30514239321388Thermally Induced Mode Amplification Characteristics of Large Mode Area Segmented Cladding FiberCaijian Xie0https://orcid.org/0000-0002-9634-7361Tigang Ning1Jingjing Zheng2Jing Li3https://orcid.org/0000-0001-9228-305XXiaowei Dong4Yanbiao Chang5https://orcid.org/0000-0003-3381-9883Li Pei6Key Lab of All Optical Network & Advanced Telecommunication Network of EMC, Institute of Lightwave Technology, Beijing Jiaotong University, Beijing, ChinaKey Lab of All Optical Network & Advanced Telecommunication Network of EMC, Institute of Lightwave Technology, Beijing Jiaotong University, Beijing, ChinaKey Lab of All Optical Network & Advanced Telecommunication Network of EMC, Institute of Lightwave Technology, Beijing Jiaotong University, Beijing, ChinaKey Lab of All Optical Network & Advanced Telecommunication Network of EMC, Institute of Lightwave Technology, Beijing Jiaotong University, Beijing, ChinaCollege of Information Engineering, North China University of Technology, Beijing, ChinaKey Lab of All Optical Network & Advanced Telecommunication Network of EMC, Institute of Lightwave Technology, Beijing Jiaotong University, Beijing, ChinaKey Lab of All Optical Network & Advanced Telecommunication Network of EMC, Institute of Lightwave Technology, Beijing Jiaotong University, Beijing, ChinaA model of amplifier based on large mode area (LMA) segmented cladding fiber (SCF) is proposed. High order modes (HOMs) filtering effect and thermal-induced modal evolution characteristics are theoretically investigated by the few-mode steady state rate equations and heat conduction equation. Simulation results show that an amplifier based on ytterbium doped SCF presents much better HOMs suppression and mode beam quality than the amplifier based on conventional step-index fiber when achieving single-mode operation by coiling fiber. Furthermore, heat load generating in the core of ytterbium doped SCF can change the pre-designed refractive index profile through the thermo-optic effect, which induces evolution of mode amplification characteristics, including mode loss decreasing and mode area shrinking. And the co-pumping amplifier ytterbium doped SCF is more advantageous to get large mode area of fundamental mode at the output end, while single-mode operation is achieved much more effectively in the counter-pumping amplifier. These results can provide guidance in the design of high-power single-mode fiber amplifier based on rare-earth doped LMA-SCF.https://ieeexplore.ieee.org/document/9321388/Heat loadlarge mode areabending losstransverse mode instabilityfiber amplifier |
| spellingShingle | Caijian Xie Tigang Ning Jingjing Zheng Jing Li Xiaowei Dong Yanbiao Chang Li Pei Thermally Induced Mode Amplification Characteristics of Large Mode Area Segmented Cladding Fiber IEEE Photonics Journal Heat load large mode area bending loss transverse mode instability fiber amplifier |
| title | Thermally Induced Mode Amplification Characteristics of Large Mode Area Segmented Cladding Fiber |
| title_full | Thermally Induced Mode Amplification Characteristics of Large Mode Area Segmented Cladding Fiber |
| title_fullStr | Thermally Induced Mode Amplification Characteristics of Large Mode Area Segmented Cladding Fiber |
| title_full_unstemmed | Thermally Induced Mode Amplification Characteristics of Large Mode Area Segmented Cladding Fiber |
| title_short | Thermally Induced Mode Amplification Characteristics of Large Mode Area Segmented Cladding Fiber |
| title_sort | thermally induced mode amplification characteristics of large mode area segmented cladding fiber |
| topic | Heat load large mode area bending loss transverse mode instability fiber amplifier |
| url | https://ieeexplore.ieee.org/document/9321388/ |
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