High-Efficiency Nanosecond Green Laser Based on Extra-Cavity Second-Harmonic Generation of a Nd:YAG MOPA System
A high infrared-to-green conversion efficiency laser is demonstrated by extra-cavity frequency-doubling of a master oscillator power amplifier (MOPA) laser. The oscillator is a diode-side-pumped acousto-optic Q-switched Nd:YAG laser at 1064 nm with an average output power of 38.2 W and a beam qualit...
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IEEE
2023-01-01
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| Series: | IEEE Photonics Journal |
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| Online Access: | https://ieeexplore.ieee.org/document/10232999/ |
| _version_ | 1797688535356014592 |
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| author | Hua-Yu Liu Zi-Han Zhou Qi Bian Yong Bo Yang Kou Lei Yuan Da-Fu Cui Qin-Jun Peng |
| author_facet | Hua-Yu Liu Zi-Han Zhou Qi Bian Yong Bo Yang Kou Lei Yuan Da-Fu Cui Qin-Jun Peng |
| author_sort | Hua-Yu Liu |
| collection | DOAJ |
| description | A high infrared-to-green conversion efficiency laser is demonstrated by extra-cavity frequency-doubling of a master oscillator power amplifier (MOPA) laser. The oscillator is a diode-side-pumped acousto-optic Q-switched Nd:YAG laser at 1064 nm with an average output power of 38.2 W and a beam quality factor <italic>M<sup>2</sup></italic> = 1.15, operating at a 2 kHz repetition rate and a 38.3 ns pulse duration. After a dual-rod double-pass amplifier, the fundamental seed power is amplified to 89.4 W with the beam quality of <italic>M<sup>2</sup></italic> = 1.41 and pulse duration of 56.4 ns. Using a type I lithium triborate (LiB<sub>3</sub>O<sub>5</sub>, LBO) crystal for second-harmonic generation (SHG), an average power of 67.4 W at 532 nm is generated with a beam quality factor of 1.31, operating at 41.8 ns of pulse duration. The corresponding frequency doubling efficiency is as high as 75.4%, which is, to the best of our knowledge, the highest doubling efficiency reported ever for 532 nm source by an extra-cavity SHG laser system. |
| first_indexed | 2024-03-12T01:32:18Z |
| format | Article |
| id | doaj.art-725c90e85b2642bb91db488138204fca |
| institution | Directory Open Access Journal |
| issn | 1943-0655 |
| language | English |
| last_indexed | 2024-03-12T01:32:18Z |
| publishDate | 2023-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj.art-725c90e85b2642bb91db488138204fca2023-09-11T23:00:10ZengIEEEIEEE Photonics Journal1943-06552023-01-011551510.1109/JPHOT.2023.330939010232999High-Efficiency Nanosecond Green Laser Based on Extra-Cavity Second-Harmonic Generation of a Nd:YAG MOPA SystemHua-Yu Liu0https://orcid.org/0000-0002-5203-1373Zi-Han Zhou1Qi Bian2https://orcid.org/0000-0001-7363-7908Yong Bo3Yang Kou4Lei Yuan5Da-Fu Cui6Qin-Jun Peng7Key Lab of Solid State Laser, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, ChinaKey Lab of Solid State Laser, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, ChinaKey Lab of Solid State Laser, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, ChinaKey Lab of Solid State Laser, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, ChinaKey Lab of Solid State Laser, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, ChinaKey Lab of Solid State Laser, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, ChinaKey Lab of Solid State Laser, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, ChinaKey Lab of Solid State Laser, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, ChinaA high infrared-to-green conversion efficiency laser is demonstrated by extra-cavity frequency-doubling of a master oscillator power amplifier (MOPA) laser. The oscillator is a diode-side-pumped acousto-optic Q-switched Nd:YAG laser at 1064 nm with an average output power of 38.2 W and a beam quality factor <italic>M<sup>2</sup></italic> = 1.15, operating at a 2 kHz repetition rate and a 38.3 ns pulse duration. After a dual-rod double-pass amplifier, the fundamental seed power is amplified to 89.4 W with the beam quality of <italic>M<sup>2</sup></italic> = 1.41 and pulse duration of 56.4 ns. Using a type I lithium triborate (LiB<sub>3</sub>O<sub>5</sub>, LBO) crystal for second-harmonic generation (SHG), an average power of 67.4 W at 532 nm is generated with a beam quality factor of 1.31, operating at 41.8 ns of pulse duration. The corresponding frequency doubling efficiency is as high as 75.4%, which is, to the best of our knowledge, the highest doubling efficiency reported ever for 532 nm source by an extra-cavity SHG laser system.https://ieeexplore.ieee.org/document/10232999/Green laserhigh-efficiencyNd:YAG MOPAextra-cavity frequency doubling |
| spellingShingle | Hua-Yu Liu Zi-Han Zhou Qi Bian Yong Bo Yang Kou Lei Yuan Da-Fu Cui Qin-Jun Peng High-Efficiency Nanosecond Green Laser Based on Extra-Cavity Second-Harmonic Generation of a Nd:YAG MOPA System IEEE Photonics Journal Green laser high-efficiency Nd:YAG MOPA extra-cavity frequency doubling |
| title | High-Efficiency Nanosecond Green Laser Based on Extra-Cavity Second-Harmonic Generation of a Nd:YAG MOPA System |
| title_full | High-Efficiency Nanosecond Green Laser Based on Extra-Cavity Second-Harmonic Generation of a Nd:YAG MOPA System |
| title_fullStr | High-Efficiency Nanosecond Green Laser Based on Extra-Cavity Second-Harmonic Generation of a Nd:YAG MOPA System |
| title_full_unstemmed | High-Efficiency Nanosecond Green Laser Based on Extra-Cavity Second-Harmonic Generation of a Nd:YAG MOPA System |
| title_short | High-Efficiency Nanosecond Green Laser Based on Extra-Cavity Second-Harmonic Generation of a Nd:YAG MOPA System |
| title_sort | high efficiency nanosecond green laser based on extra cavity second harmonic generation of a nd yag mopa system |
| topic | Green laser high-efficiency Nd:YAG MOPA extra-cavity frequency doubling |
| url | https://ieeexplore.ieee.org/document/10232999/ |
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