光纤基线标定激光测距仪方法研究
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摘要
提出利用光纤基线代替野外基线标定激光测距仪的方法,将室外基线引入到室内。研究激光到光纤耦合方法并选取适当的耦合元件参数,搭建稳定的激光器到光纤高效耦合平台。对3段不同长度光纤基线进行了光程长度测量实验,分析了光波长、温度、聚焦透镜、色散等因素对测量结果的影响。实验获得了稳定的测量数据,测量结果偏差在2mm以内,验证了方法的可行性。
A novel scheme of calibrating the laser rangefinder using optical fiber baseline is proposed.Coupling between laser beam and optical fiber is studied for the optical components design.By establishing the coupling system between laser diode and optical fiber,the outdoor baseline is successfully replaced by the indoor optical fiber.Optical path length measurement experiments are conducted on three kinds of fibers.Effects of wavelength,temperature and material dispersion on the experiment results are discussed.Stable data are derived in the experiments,the deviation is proved to be within 2 mm,indicating that the proposed calibration method is feasible.
A novel scheme of calibrating the laser rangefinder using optical fiber baseline is proposed.Coupling between laser beam and optical fiber is studied for the optical components design.By establishing the coupling system between laser diode and optical fiber,the outdoor baseline is successfully replaced by the indoor optical fiber.Optical path length measurement experiments are conducted on three kinds of fibers.Effects of wavelength,temperature and material dispersion on the experiment results are discussed.Stable data are derived in the experiments,the deviation is proved to be within 2 mm,indicating that the proposed calibration method is feasible.
引文
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[2]Forde L C,Howick E F.An extension of traceablecalibration for electronic distance measuring instru-ments beyond the length of the laboratory[J].SPIE,2003,5190:289-299.
[3]杨维芳.光电测距仪室内长基线建立方法研究[D].北京:中国地震局地球物理研究所,2009.Yang Weifang.Establishment method of longer labo-ratory baselines for verificating EDMs[D].Beijing:Institute of Geophysics,China Earthquake Adminis-tration,2009.
[4]杨潘,李新婉,李中方,等.基于标准光纤的全站仪测距室内检定[J].电子技术,2011,38(2):4-5.Yang Pan,Li Xinwan,Li Zhongfang,et al.Indoorcalibration of ranging by total station based on stan-dard optical fiber[J].Electronic Technology,2011,38(2):4-5.
[5]贾波,钱松荣,华中一,等.全光纤干涉系统用于光纤长度测量实验[J].中国激光,2002,29(1):1-3.Jia Bo,Qian Songrong,Hua Zhongyi,et al.Opticfiber length measurement using all-fiber interferome-ter[J].Chinese Journal of Lasers,2002,A(29):1-3.
[6]李文成,谷晋骐,王涌萍.激光光斑及束腰光斑尺寸的测量研究[J].应用光学,2002,23(3):30-33.Li Wencheng,Gu Jinqi,Wang Yongping.Research onlaser spot and beam waist spot size measurement[J].Applied Optics,2002,23(3):30-33.
[7]姜兴山.透镜的焦距对激光聚焦焦斑影响的研究[J].佳木斯大学学报,2002,20(3):288-290.Jiang Xingshan.A study on the influence of opticalfocal length of lens on laser focal spot[J].Journal ofJiamusi University,2002,20(3):288-290.
[8]Zumberge M A.Precise optical path length measure-ment through an optical fiber:application to seafloorstrain monitoring[J].Ocean Eng,1997,24(6):531-542.
[9]Hocker G B.Fiber-optic sensing of pressure andtemperature[J].Applied Optics,1979(18):1445-1448.
[10]杨中东,雷玉堂.利用光纤检定激光测距仪的研究[J].光电工程,2007,34(1):139-144.Yang Zhongdong,Lei Y tang.Calibrating laserrangefinder using fiber[J].Opto-Electronic Engi-neering,2007,34(1):139-144.
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