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Effect of thermally induced birefringence on high power picosecond azimuthal polarization Nd:YAG laser system |
| Hongpan Peng(彭红攀), Ce Yang(杨策), Shang Lu(卢尚), Ning Ma(马宁), Meng Chen(陈檬) |
| Laser Engineering Research Institute, Beijing University of Technology, Beijing 100124, China |
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Abstract Pulse-burst 1064-nm picosecond azimuthal polarization beam amplification up to an average power of 16.32 W using side-pumped Nd: YAG amplifiers has been demonstrated. The maximum envelop energy as much as 16.32 mJ, corresponding to a power amplification factor of 299.5%. A simple criterion was defined to help estimate the amount of depolarization in Nd:YAG amplifier stages. The degree of depolarization of the beam was 7.1% and the beam quality was measured to be M2 = 3.69. The reason for the azimuthal polarization depolarization and beam quality degradation were explained theoretically and experimentally during the amplification process.
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Received: 13 November 2018
Revised: 04 December 2018
Accepted manuscript online:
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PACS:
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42.25.Lc
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(Birefringence)
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42.60.Da
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(Resonators, cavities, amplifiers, arrays, and rings)
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42.65.Re
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(Ultrafast processes; optical pulse generation and pulse compression)
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29.25.Lg
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(Ion sources: polarized)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. U1631240), the Education Commission Program of Beijing, and Beijing Natural Science Foundation (Grant No. KZ201510005001). |
Corresponding Authors:
Meng Chen
E-mail: chenmeng@bjut.edu.cn
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Cite this article:
Hongpan Peng(彭红攀), Ce Yang(杨策), Shang Lu(卢尚), Ning Ma(马宁), Meng Chen(陈檬) Effect of thermally induced birefringence on high power picosecond azimuthal polarization Nd:YAG laser system 2019 Chin. Phys. B 28 024205
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