| 卫星激光通信跟瞄精度测试方法及其实验研究 |
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| 引用本文： | 秦谊,王建民,王丽丽,徐泉.卫星激光通信跟瞄精度测试方法及其实验研究[J].光学技术,2007,33(4):557-560. |
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| 作者姓名： | 秦谊 王建民 王丽丽 徐泉 |
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| 作者单位： | 北京大学,信息科学技术学院,北京,100871 |
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| 基金项目： | 国防重点实验室基金资助项目(51473040205-JW0201)，国家自然科学基金资助项目(60377028) |
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| 摘 要： | 卫星激光通信捕获、跟踪、瞄准(ATP)需要端机具备有微弧度(μrad)量级的高精度跟踪能力。如何检验通信端机的这一特性是一个很重要的问题。设计了一套端机跟瞄精度测试装置。装置模拟入射光方向的偏转,端机跟踪从偏转方向发出的回馈信标光。通过测量回馈光远场光斑的位置变化可以得到端机的跟瞄精度。测试实验表明,当入射光方向的变化小于4μrad,测试频率在0~250Hz时,测试系统的精度可达到0.2μrad。此项工作对卫星激光通信的光链路通信的研究以及对端机性能的整体评估具有重要意义。
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| 关 键 词： | 激光技术 跟瞄精度 远场光斑 ATP |
| 收稿时间： | 2006/9/11 |
Tracking target simulator and measuring techniques for the free-space laser communication |
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| QIN Yi,WANG Jian-ming,WANG Li-li,XU Quan.Tracking target simulator and measuring techniques for the free-space laser communication[J].Optical Technique,2007,33(4):557-560. |
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| Authors: | QIN Yi WANG Jian-ming WANG Li-li XU Quan |
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| Abstract: | The tracking precision of a terminal is required up to μrad level for the acquisition/tracking/pointing (ATP) system of the free-space laser communication. It's important to validate this feature of the communication terminal. Hence a Tracking target simulator is designed to measure the terminal's tracking precision. The system simulates the incident light's deflection first,then the terminal tracks the deflection and send back a beacon. The tracking precision is got by measuring the far-field facula position of the beacon. The experiment results show that the measuring system has a precision of 0.2μrad with 4μrad in amplitude and 250Hz in frequency. It is important for the research on the optical inter-satellite link (ISL) and the judgement of the free-space laser communication terminal. |
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| Keywords: | laser techniques tracking precision far-field facula ATP(acquisition/tracking/pointing) |
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