Experimental Study on PAT System for Long-Distance Laser Communications Between Fixed-Wing Aircrafts

Photonic Sensors, Oct 2018

Free-space laser communication is characterized by high communication speed, strong anti-jamming ability, high confidentiality, and flexible configuration. In this paper, a pointing, acquisition, and tracking (PAT) system based on a two-stage (i.e., coarse and fine) composite tracking mechanism is proposed to solve the optical axis alignment problem, which is common in free-space laser communications. The acquisition probability of the PAT system is ensured by designing two tracking modules, a coarse tracking module which combines passive damping with active suppression and a fine tracking module based on an electromagnetic galvanometer. Both modules are combined by using a dynamic scanning mechanism based on the gyroscope signal. Finally, a free-space laser communication test with a long range and a high speed is conducted by two fixed-wing Y12 aircrafts equipped with the proposed PAT system. Experimental results show that the coarse tracking precision of the airborne PAT system is 10 μrad (1σ), and the fine tracking precision is 8 μrad (1σ) during flights which are much improved as compared with the indoor tests. This indicates that the system can achieve a high precision for PAT during high-speed and long-range laser communications in the free-space. This also verifies the tracking capability and the environmental adaptability of the proposed laser communication PAT system.

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Experimental Study on PAT System for Long-Distance Laser Communications Between Fixed-Wing Aircrafts

Photonic Sensors pp 1–9 | Cite as Experimental Study on PAT System for Long-Distance Laser Communications Between Fixed-Wing Aircrafts AuthorsAuthors and affiliations Yao LeiXiaoming LiLizhong Zhang Open Access Regular First Online: 27 October 2018 10 Downloads Abstract Free-space laser communication is characterized by high communication speed, strong anti-jamming ability, high confidentiality, and flexible configuration. In this paper, a pointing, acquisition, and tracking (PAT) system based on a two-stage (i.e., coarse and fine) composite tracking mechanism is proposed to solve the optical axis alignment problem, which is common in free-space laser communications. The acquisition probability of the PAT system is ensured by designing two tracking modules, a coarse tracking module which combines passive damping with active suppression and a fine tracking module based on an electromagnetic galvanometer. Both modules are combined by using a dynamic scanning mechanism based on the gyroscope signal. Finally, a free-space laser communication test with a long range and a high speed is conducted by two fixed-wing Y12 aircrafts equipped with the proposed PAT system. Experimental results show that the coarse tracking precision of the airborne PAT system is 10 μrad (1σ), and the fine tracking precision is 8 μrad (1σ) during flights which are much improved as compared with the indoor tests. This indicates that the system can achieve a high precision for PAT during high-speed and long-range laser communications in the free-space. This also verifies the tracking capability and the environmental adaptability of the proposed laser communication PAT system. KeywordsPAT system laser communications airborne platform coarse tracking error fine tracking error  Download to read the full article text Notes Acknowledgement This project was supported by the National Natural Science Foundation of China (Grant No. 51505087). Also, we thank the Collaborative Innovation Center of High-End Equipment Manufacturing in Fujian Province of China for applying the experimental field. References [1] J. C. Juarez, D. W. Young, J. E. Sluz, and D. H. Hughes, “Free-space optical channel propagation tests over a 147 km link,” SPIE, 2011, 8038(1): 80380B-1–80380B-10.ADSGoogle Scholar [2] T. M. Fletcher, J. Cunningham, D. Baber, D. Wickholm, T. Goode, B. Gaughan, et al., “Observations of atmospheric effects for FALCON laser communication system flight test,” SPIE, 2011, 8038(1): 80380F-1–80380F-12.Google Scholar [3] M. Q. 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Authors and Affiliations Yao Lei1Email authorXiaoming Li2Lizhong Zhang31.School of Mechanical Engineering and AutomationFuzhou UniversityFuzhouChina2.National and Local Joint Engineering Research Center of Space Optoelectronics TechnologyChangchun University of Science and TechnologyChangchunChina3.Institute of Space Optoelectronic TechnologyChangchun University of Science and TechnologyChangchunChina


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Yao Lei, Xiaoming Li, Lizhong Zhang. Experimental Study on PAT System for Long-Distance Laser Communications Between Fixed-Wing Aircrafts, Photonic Sensors, 2018, 1-9, DOI: 10.1007/s13320-018-0522-9