High precision spot position detection model for the near infrared light

Jiabin, 吴佳彬 Wu; Yunshan, 陈云善 Chen; Shijie, 高世杰 Gao; Zhi-yong, 吴志勇 Wu

doi:10.3788/irla201645.0717001

Cited by 3 publications

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“…In this paper, leveraging over 10 years of extensive experience in FSO communication [28][29][30][31][32][33][34], we present a comprehensive review of VBDA technology. To the best of our knowledge, this is the first review of VBDA technology.…”

Section: Introductionmentioning

confidence: 99%

A Review of Variable-Beam Divergence Angle FSO Communication Systems

Zhang

et al. 2023

Photonics

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Free-space optical (FSO) communication is widely used in satellites, ships, aircraft, and ground stations due to its advantages of high speed, large capacity, good confidentiality, and strong anti-interference ability. Variable-beam divergence angle (VBDA) technology makes FSO systems more flexible; this has the benefits of higher acquisition probability, stronger tracking ability, wider communication link range, and lower energy consumption. In other words, the study of VBDA has both theoretical significance and practical relevance. This paper conducts a comprehensive search of relevant scientific databases, journals, conference proceedings, patents, and books to identify publications related to VBDA technology. We analyze these publications, classify and organize various VBDA techniques based on their respective methods. To the best of our knowledge, this is the first review of VBDA technology. In this paper, we first explain the basic principle of changing the beam divergence angle by employing the ABCD matrix, and further furnish a detailed overview of the methods used for VBDA along with their corresponding advantages and disadvantages. In addition, we provide a comprehensive summary of the research conducted using VBDA technology across different link types. Lastly, we identify the challenges and potential future research directions for VBDA technology.

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Section: Introductionmentioning

confidence: 99%

A Review of Variable-Beam Divergence Angle FSO Communication Systems

Zhang

et al. 2023

Photonics

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Method to Improve the Detection Accuracy of Quadrant Detector Based on Neural Network

Wang

Liu

et al. 2021

IEEE Photon. Technol. Lett.

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基于蒙特卡罗方法的相干四象限探测器仿真研究

Zhang Ziqi,

Yu Xiaonan,

Tong Shoufeng

2023

中国激光

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Objective Gravitational waves are ripples of the curvature of space and time in the universe. They dominate the evolution and operation of the universe in the form of waves. Gravitational wave detection has been widely used by many scholars at home and abroad and has achieved breakthrough results. Gravitational wave detection is one of the most concerned frontiers of scientific research in the history of contemporary physics. Space laser heterodyne interferometer is a key component of gravitational wave detection system. The fourquadrant detector is an important part of the laser interference gravitational wave detector, which can be used for spot position detection, laser angle measurement, data transmission and reception, etc. The performance of the fourquadrant detector will directly affect the accuracy of the gravitational wave detector. Influenced by noise factors, the system signaltonoise ratio (SNR) of laser interference gravitational wave detector and other parameters will be affected, thus affecting the detection accuracy and performance of the system. Therefore, it is necessary to establish a complete mathematical model for the position detection process of the fourquadrant detector and verify it through the simulation system, so as to analyze the factors affecting the position detection accuracy and improve the detection method. MethodsIn order to analyze the factors that affect the position detection accuracy of the fourquadrant detector, in this paper, firstly, the noise factors in the laser heterodyne interferometer and the relationship between the local oscillator power and the system SNR are analyzed. The mathematical theoretical model of the fourquadrant detector position detection is established, and the main factors affecting the position detection accuracy are theoretically derived. Then the position detection simulation system is established by using Monte Carlo random simulation method, and the Monte Carlo random points are used to characterize the receiving and solving process of the fourquadrant detector spot. Finally, the simulation results are compared with the theoretical results of the 1306004 -10 研究论文第 50 卷第 13 期/2023 年 7 月/中国激光 mathematical model, and the correctness and accuracy of the simulation results are verified.Results and Discussions The simulation system of fourquadrant detector position detection model based on Monte Carlo method is established. The simulation system is based on the Monte Carlo idea and consists of three parts: the Gaussian spot generation process, the spot center position calculation process, and the error evaluation process (Fig. 4). The estimated spot center position is compared with the true value to judge the accuracy of the Monte Carlo simulation method (Fig. 5). The simulation results show that due to the correlation of beat frequency signal noise among the four quadrants, the position detection accuracy is not affected by beat frequency signal noise (Fig. 6). Due to the independence of detector noise in the four quadrants, when the system SNR caus...

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High precision spot position detection model for the near infrared light

Cited by 3 publications

References 0 publications

A Review of Variable-Beam Divergence Angle FSO Communication Systems

A Review of Variable-Beam Divergence Angle FSO Communication Systems

Method to Improve the Detection Accuracy of Quadrant Detector Based on Neural Network

基于蒙特卡罗方法的相干四象限探测器仿真研究

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