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离焦对激光通信接收视场的影响分析

许燚赟 董科研 安岩 朱天元 颜佳

许燚赟, 董科研, 安岩, 朱天元, 颜佳. 离焦对激光通信接收视场的影响分析[J]. 中国光学, 2018, 11(5): 822-831. doi: 10.3788/CO.20181105.0822
引用本文: 许燚赟, 董科研, 安岩, 朱天元, 颜佳. 离焦对激光通信接收视场的影响分析[J]. 中国光学, 2018, 11(5): 822-831. doi: 10.3788/CO.20181105.0822
XU Yi-yun, DONG Ke-yan, AN Yan, ZHU Tian-yuan, YAN Jia. Analysis of the influence of defocus on the field of view of laser communication reception[J]. Chinese Optics, 2018, 11(5): 822-831. doi: 10.3788/CO.20181105.0822
Citation: XU Yi-yun, DONG Ke-yan, AN Yan, ZHU Tian-yuan, YAN Jia. Analysis of the influence of defocus on the field of view of laser communication reception[J]. Chinese Optics, 2018, 11(5): 822-831. doi: 10.3788/CO.20181105.0822

离焦对激光通信接收视场的影响分析

doi: 10.3788/CO.20181105.0822
基金项目: 

吉林省重大科技成果转化项目(原"双十工程"重大科技成果转化项目) 20160301005GX

长春市科技发展计划资助项目 18DY016

详细信息
    作者简介:

    许燚赟(1993-), 男, 浙江嘉兴人, 硕士研究生, 2016年于长春理工大学光电信息学院获得学士学位, 主要从事激光通信方面的研究。E-mail:1013992381@qq.com

    董科研(1980—),男,吉林长春人,博士,副教授,硕士生导师,主要从事光学系统设计、激光通信和光谱仪器设计等方面的研究。E-mail:dongkeyan@163.com

    安岩(1986—),男,吉林长春人,博士,讲师,2014年于中国科学院长春精密机械与物理研究所获得博士学位,主要从事激光通信及光学系统设计方面的研究。E-mail:anyan_7@126.com

  • 中图分类号: O435

Analysis of the influence of defocus on the field of view of laser communication reception

Funds: 

Jilin Province S & T Conversion project of China 20160301005GX

Changchun Science and Technology Development Plan 18DY016

More Information
  • 摘要: 为了降低自由空间激光通信中对准难度,本文提出了采用离焦的方法以增大接收视场角。以满足通信所需最低能量(-35 dBm)为基准,理论推导了探测器接收能量、接收视场角(FOV)、离焦接收能量及离焦量之间的相互关系,并通过Matlab仿真,分析对比了离焦接收能量和离焦量对接收视场角的影响。结果显示,当离焦量为0.5 mm时,离焦接收能量从-20.9 dBm提高到-4.1 dBm,接收视场角能增大0.27 mrad;当离焦接收能量为-4.1 dBm时,离焦量从0.2 mm扩大到1.0 mm,视场角能增大1.75 mrad。通过对比表明,提高离焦接收能量以及扩大离焦量都可以增加接收视场角,且扩大离焦量的效果相对比较明显,这对后续离焦系统的设计提供了理论指导依据。
  • 图  1  离焦成像模型示意图

    Figure  1.  Schematic diagram of defocused imaging model

    图  2  不同离焦量和视场下的光斑示意图

    Figure  2.  Schematic diagram of spot at different defocusing amount and FOV

    图  3  光斑与探测器重叠面积示意图

    Figure  3.  Schematic diagram of overlapping area of spot and detector

    图  4  重叠面积与离焦量的关系曲线

    Figure  4.  Relation curve of overlapping area and defocusing amount

    图  5  固定视场下的离焦量变化示意图

    Figure  5.  Schematic diagram of defocusing amount change at fixed FOV

    图  6  固定离焦量下的视场变化示意图

    Figure  6.  Schematic diagram of FOV change at fixed defocusing amount

    图  7  光斑完全覆盖探测器面下的探测器接收能量与离焦量的关系图

    Figure  7.  Relation diagram of energy received by detector and defocusing amount under the condition of detector completely covered by the spot

    图  8  固定重叠面积下的最大视场示意图

    Figure  8.  Schematic diagram of maximum FOV at fixed overlapping area

    图  9  不同视场下的探测器接收能量与离焦量的关系曲线

    Figure  9.  Relation curves of energy received by detector and defocusing amount at different FOVs

    图  10  不同离焦接收能量下探测器接收能量与视场角的关系曲线

    Figure  10.  Relation curves of energy received by detector and FOV at different defocus receiving energy

    图  11  光斑与探测器位置关系图

    Figure  11.  Position relationship between spot and detector

    图  12  不同离焦量下探测器接收能量与视场角的关系曲线图

    Figure  12.  Relation curves of energy received by detector and FOV at different defocusing amount

    表  1  链路计算输入参数

    Table  1.   Input parameters of link calculation

    Parameter/unit Value
    Pt/dBm 20
    Dr/mm 20
    D/mm 50
    f/mm 150
    ω/μrad 400
    γt /dBm 1.87
    γr/dBm 0.97
    γf/dBm 1.55
    γa/(dBm·km-1) 1.6
    下载: 导出CSV

    表  2  不同通信距离下的离焦接收能量

    Table  2.   Defocus receiving energy at different communication distances

    Parameter/unit Value
    L/km 1 2 3 4
    Pr/dBm -4.1 -11.7 -16.8 -20.9
    下载: 导出CSV

    表  3  离焦与非离焦接收视场对比

    Table  3.   Contrast of FOV under the conditions of defocus and non-defocus

    Image 2θ/mrad Δx/mm PAPD/dBm
    defocus 1 0.266 -35
    1.5 0.495 -35
    2 0.723 -35
    2.5 0.952 -35
    non-defocus 0.417 0 -35
    下载: 导出CSV
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出版历程
  • 收稿日期:  2018-01-03
  • 修回日期:  2018-03-02
  • 刊出日期:  2018-10-01

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