Boundary layer effect and compensation in airborne laser communication

Lixin, 孟立新 Meng; Ding-xuan, 赵丁选 Zhao; Lizhong, 张立中 Zhang; Huilin, 姜会林 Jiang

doi:10.3788/ope.20142212.3231

Cited by 5 publications

(1 citation statement)

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“…system is also the core component of the aviation fighter's pod system, it requires the pointing system to meet the accuracy level of sub mrad, for example, the airborne laser communication's pod adopts a composite pointing mechanism and its pointing accuracy reaches 10 μrad [6].…”

Section: Introductionmentioning

confidence: 99%

WITHDRAWN: Conceptual Research and Verification of a Single-stage High-precision Pointing Technology

Wang²,

Wang

et al. 2021

Preprint

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High-precision pointing plays a critical role in optical equipment and laser communication systems. In order to reach the level of sub mrad for pointing accuracy, a two-stage pointing technology is currently widely used. However, this results in significant technical complexity. Therefore, the realization of a high-precision pointing technology under single-stage control is highly challenging. In this study, we find that erase the floating errors of the middle link of the mechanism can effectively improve the pointing accuracy. Based on this assumption, we propose the concept of a single-stage high-precision pointing technology and also establish its mathematical model of drive and an error elimination algorithm. Using modern computer technology, we study the working principle of this single-stage high-precision pointing technology in detail. We also build a prototype and test its performance. The test results show that the uniaxial error of the prototype is no greater than 0.004°, while its spatial synthetic error is no greater than 0.006° and the stability time is less than 100 ms. The test results show that this concept is completely feasible. It is also found that the accuracy of the pointing system can further be improved when the vibration is suppressed, which also represents an important concept for further research. We anticipate that an ultra-high-precision pointing system with single-stage control will be established in the near future.

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Section: Introductionmentioning

confidence: 99%

WITHDRAWN: Conceptual Research and Verification of a Single-stage High-precision Pointing Technology

Wang²,

Wang

et al. 2021

Preprint

View full text Add to dashboard Cite

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Airborne Laser Communication System with Automated Tracking

Liang

2021

International Journal of Optics

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The acquisition, alignment, and tracking system is an important part of airborne laser communication and is the prerequisite and guarantee for the normal communication link. In order to solve the problem of automatic tracking of laser communication links in the airborne environment, the rapid capture, alignment, and tracking of beams between terminals are realized. This article proposes a stepping motor as a control servo system and a four-quadrant detector as an automatic tracking method for the detection unit. The pulse width modulation signal controls the rotation speed of the stepping motor and combines the position distribution of the light spot on the four-quadrant detector to achieve high-precision beam tracking. On this basis, indoor simulation experiments are carried out. After many experiments, the tracking accuracy is better than 2.5 μrad, which shows that the system can be applied to airborne laser communication, and it is verified that this method has good automatic tracking performance for airborne laser communication.

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