Cylindrical Vector Beams with an MOPA Amplifier Based on Nonlinear Polarization Rotation Mode-Locking
CVBs (cylindrical vector beams) are widely used in optical imaging, optical trapping, material processing, etc. In this study, based on mode-selective couplers and passive mode-locking fiber technology, a cylindrical vector fiber amplifier with an MOPA (master oscillator power amplifier) structure w...
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-10-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/11/11/1013 |
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| author | Tianyu Zhang Dong Li Siqi Pei Yun Zhu Jiapeng Hu Xuesheng Liu Anru Yan Youqiang Liu Zhiyong Wang |
| author_facet | Tianyu Zhang Dong Li Siqi Pei Yun Zhu Jiapeng Hu Xuesheng Liu Anru Yan Youqiang Liu Zhiyong Wang |
| author_sort | Tianyu Zhang |
| collection | DOAJ |
| description | CVBs (cylindrical vector beams) are widely used in optical imaging, optical trapping, material processing, etc. In this study, based on mode-selective couplers and passive mode-locking fiber technology, a cylindrical vector fiber amplifier with an MOPA (master oscillator power amplifier) structure was developed. In the experiment, the pre-amp stage reached 19.87 mW output power and a CVB output with a mode purity greater than 97%. The measured beam quality factor was M<sup>2</sup> = 2.1. The CVB output power obtained by the first-amp stage was 152.4 mW, and the mode purity was greater than 92%. The measured beam quality factor was M<sup>2</sup> = 1.99. The internal inhomogeneity and external effects of the isotropic LMA (large-mode-area) fiber led to a decrease in beam quality and mode purity. After amplification, the gain of the fundamental mode was higher and the power was greater, resulting in a greatly reduced mode purity. This CVB fiber amplifier yielded important research value in expanding the applications of high-power fiber lasers. |
| format | Article |
| id | doaj-art-9f1cc5ccce194e5381d11b076afae66b |
| institution | Kabale University |
| issn | 2304-6732 |
| language | English |
| publishDate | 2024-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj-art-9f1cc5ccce194e5381d11b076afae66b2024-11-26T18:18:16ZengMDPI AGPhotonics2304-67322024-10-011111101310.3390/photonics11111013Cylindrical Vector Beams with an MOPA Amplifier Based on Nonlinear Polarization Rotation Mode-LockingTianyu Zhang0Dong Li1Siqi Pei2Yun Zhu3Jiapeng Hu4Xuesheng Liu5Anru Yan6Youqiang Liu7Zhiyong Wang8School of Physics and Optoelectronic Engineering, Beijing University of Technology, Beijing 100124, ChinaAVIC Beijing Aeronautical Manufacturing Technology Research Institute, Beijing 100024, ChinaSchool of Physics and Optoelectronic Engineering, Beijing University of Technology, Beijing 100124, ChinaSchool of Physics and Optoelectronic Engineering, Beijing University of Technology, Beijing 100124, ChinaSchool of Physics and Optoelectronic Engineering, Beijing University of Technology, Beijing 100124, ChinaSchool of Physics and Optoelectronic Engineering, Beijing University of Technology, Beijing 100124, ChinaSchool of Physics and Optoelectronic Engineering, Beijing University of Technology, Beijing 100124, ChinaSchool of Physics and Optoelectronic Engineering, Beijing University of Technology, Beijing 100124, ChinaSchool of Physics and Optoelectronic Engineering, Beijing University of Technology, Beijing 100124, ChinaCVBs (cylindrical vector beams) are widely used in optical imaging, optical trapping, material processing, etc. In this study, based on mode-selective couplers and passive mode-locking fiber technology, a cylindrical vector fiber amplifier with an MOPA (master oscillator power amplifier) structure was developed. In the experiment, the pre-amp stage reached 19.87 mW output power and a CVB output with a mode purity greater than 97%. The measured beam quality factor was M<sup>2</sup> = 2.1. The CVB output power obtained by the first-amp stage was 152.4 mW, and the mode purity was greater than 92%. The measured beam quality factor was M<sup>2</sup> = 1.99. The internal inhomogeneity and external effects of the isotropic LMA (large-mode-area) fiber led to a decrease in beam quality and mode purity. After amplification, the gain of the fundamental mode was higher and the power was greater, resulting in a greatly reduced mode purity. This CVB fiber amplifier yielded important research value in expanding the applications of high-power fiber lasers.https://www.mdpi.com/2304-6732/11/11/1013cylindrical vector beamsamplifiermode-selective couplersbeam quality factor |
| spellingShingle | Tianyu Zhang Dong Li Siqi Pei Yun Zhu Jiapeng Hu Xuesheng Liu Anru Yan Youqiang Liu Zhiyong Wang Cylindrical Vector Beams with an MOPA Amplifier Based on Nonlinear Polarization Rotation Mode-Locking Photonics cylindrical vector beams amplifier mode-selective couplers beam quality factor |
| title | Cylindrical Vector Beams with an MOPA Amplifier Based on Nonlinear Polarization Rotation Mode-Locking |
| title_full | Cylindrical Vector Beams with an MOPA Amplifier Based on Nonlinear Polarization Rotation Mode-Locking |
| title_fullStr | Cylindrical Vector Beams with an MOPA Amplifier Based on Nonlinear Polarization Rotation Mode-Locking |
| title_full_unstemmed | Cylindrical Vector Beams with an MOPA Amplifier Based on Nonlinear Polarization Rotation Mode-Locking |
| title_short | Cylindrical Vector Beams with an MOPA Amplifier Based on Nonlinear Polarization Rotation Mode-Locking |
| title_sort | cylindrical vector beams with an mopa amplifier based on nonlinear polarization rotation mode locking |
| topic | cylindrical vector beams amplifier mode-selective couplers beam quality factor |
| url | https://www.mdpi.com/2304-6732/11/11/1013 |
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