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Research on common aperture optical device for high energy laser system
Author(s): Gang Zhao; Wantao Deng; Huijun Xia; Mao Zhang
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Paper Abstract

The main working mode of high energy laser system is to focus the transmitting laser beam on target under the condition that the target is tracked in closed loop by fine tracking module, so that it can be damaged or invalidated. Therefore, in order to achieve this effect, an optical device of common aperture is designed for high energy laser system. The emitting system of this device consists of an off-axis two-trans primary telescope module, a Galileo transmission telescope module used in focusing and a beam feeding module composed of dichroic mirror, fast mirror and other optical elements; at the same time, the receiving system of this device consists of the same off-axis two-trans primary telescope module, an imaging module used in fine tracking and the same beam feeding module. Taking incoherent combination laser in space as incident ray, we use optical design software in both sequential mode and non-sequential mode to design and simulate this device. The simulation results show that the distribution of spot at 0.5km~5km is obtained after the laser is modulated by different focusing quantities in the focusing telescope module, and the RMS value of laser wave front is better than λ/20 for emitting system. In addition, the performance of an imaging optical system composed of the primary telescope module and the fine tracking imaging module approach the diffraction limit after optimizing, and the system transfer function is greater than 0.6 at 70lp/mm. Such results in this paper confirm that the structure of this optical transceiver possesses reasonable structure and reliable performance, which meets the requirements of engineering application for high energy laser system.

Paper Details

Date Published: 17 May 2019
PDF: 9 pages
Proc. SPIE 11170, 14th National Conference on Laser Technology and Optoelectronics (LTO 2019), 111701O (17 May 2019); doi: 10.1117/12.2533459
Show Author Affiliations
Gang Zhao, Southwest Institute of Technical Physics (China)
Wantao Deng, Southwest Institute of Technical Physics (China)
Huijun Xia, Southwest Institute of Technical Physics (China)
Mao Zhang, Southwest Institute of Technical Physics (China)


Published in SPIE Proceedings Vol. 11170:
14th National Conference on Laser Technology and Optoelectronics (LTO 2019)
Jianqiang Zhu; Weibiao Chen; Zhenxi Zhang; Minlin Zhong; Pu Wang; Jianrong Qiu, Editor(s)

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