激光合束光学系统气体热效应影响分析

兰硕; 李新南; 徐晨

doi:10.3788/CO.20181101.0108

Volume 11 Issue 1

Feb. 2018

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Chinese Optics > 2018 > 11(1): 108-114.

LAN Shuo, LI Xin-nan, XU Chen. Influence of gas thermal effect on beam combination system[J]. Chinese Optics, 2018, 11(1): 108-114. doi: 10.3788/CO.20181101.0108

Citation:

LAN Shuo, LI Xin-nan, XU Chen. Influence of gas thermal effect on beam combination system[J]. Chinese Optics, 2018, 11(1): 108-114. doi: 10.3788/CO.20181101.0108

LAN Shuo, LI Xin-nan, XU Chen. Influence of gas thermal effect on beam combination system[J]. Chinese Optics, 2018, 11(1): 108-114. doi: 10.3788/CO.20181101.0108

Citation:

LAN Shuo, LI Xin-nan, XU Chen. Influence of gas thermal effect on beam combination system[J]. Chinese Optics, 2018, 11(1): 108-114. doi: 10.3788/CO.20181101.0108

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Influence of gas thermal effect on beam combination system

doi: 10.3788/CO.20181101.0108

LAN Shuo^{1, 2, 4
,},
LI Xin-nan^{1, 3
,
,},
XU Chen^{1, 3}

1.
National Astronomical Observatories/Nanjing Institute of Astronomical Optics & Technology, Chinese Academy of Sciences, Nanjing 210042, China
2.
The 9th Designing of China Aerospace Science Industry Corp., Wuhan 430040, China
3.
Key Laboratory of Astronomical Optics & Technology, Nanjing Institute of Astronomical Optics & Technology, Chinese Academy of Sciences, Nanjing 210042, China
4.
University of Chinese Academy of Sciences, Beijing 100049, China

More Information

Corresponding author: LI Xin-nan, E-mail:xnli@niaot.ac.cn
Received Date: 11 Sep 2017
Rev Recd Date: 12 Nov 2017
Publish Date: 01 Feb 2018

Abstract

Abstract

The thermal coupling effecting on laser beam combining optical system is studied in this paper in order to analyze the imaging quality of the system. The laser beam combining system is modeled using optical design software, and the gas fluid model is established based on heat transfer theory according to the structure of the optical system and the parameters of the flow field. According to the ray tracing method, a user-defined function is defined and the wave aberration coefficient caused by the thermal effect of the medium gas is quantitatively studied through numerical simulation. The influence of gas thermal effect on the laser optical system at different time is simulated and analyzed. The results show that the rotational symmetry of the thermal effect in the beam combination system is no longer noticeable under the influence of gravity, but stratification changes with increasing temperature, and the non-uniform thermal effect is dominated by low-order aberrations. The wave aberration coefficient can be imported into the optical design software to quantitatively analyze the transfer function of the coupling of the complex optical field and the thermal field. At this time, the wave aberration is deteriorated by 0.3λ, and the transfer function value is decreased by 0.1.
- laser beam combination,
- imaging quality,
- thermal effects,
- atmospheric optics

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References(15)

References

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