| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Wavefront evolution of the signal beam in Ti: sapphire chirped pulse amplifier |
| Zhen Guo(郭震)1,2, Lianghong Yu(於亮红)1, Wenqi Li(李文启)1,2,3, Zebiao Gan(甘泽彪)1, Xiaoyan Liang(梁晓燕)1,3 |
1 State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China;
3 School of Physical Science and Technology, Shanghai Technology University, Shanghai 200031, China |
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Abstract We studied the evolution of wavefront aberration (WFA) of a signal beam during amplification in a Ti:sapphire chirped pulse amplification (CPA) system. The results verified that the WFA of the amplified laser beam has little relation with the change of the pump beam energies. Transverse parasitic lasing that might occur in CPA hardly affects the wavefront of the signal beam. Thermal effects were also considered in this study, and the results show that the thermal effect cumulated in multiple amplification processes also has no obvious influence on the wavefront of the signal beam for a single-shot frequency. The results presented in this paper confirmed experimentally that the amplification in a Ti:sapphire CPA system has little impact on the WFA of the signal beam and it is very helpful for wavefront correction of single-shot PW and multi-PW laser systems based on Ti:sapphire.
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Received: 15 March 2018
Revised: 20 September 2018
Accepted manuscript online:
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PACS:
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42.15.Dp
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(Wave fronts and ray tracing)
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42.60.-v
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(Laser optical systems: design and operation)
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42.60.Jf
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(Beam characteristics: profile, intensity, and power; spatial pattern formation)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 61775223) and the Strategic Priority Research Program of Chinese Academy of Sciences (Grant No. XDB1603). |
Corresponding Authors:
Lianghong Yu, Xiaoyan Liang
E-mail: lhyu@siom.ac.cn;liangxy@siom.ac.cn
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Cite this article:
Zhen Guo(郭震), Lianghong Yu(於亮红), Wenqi Li(李文启), Zebiao Gan(甘泽彪), Xiaoyan Liang(梁晓燕) Wavefront evolution of the signal beam in Ti: sapphire chirped pulse amplifier 2019 Chin. Phys. B 28 014203
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