光纤折射率分布和几何参数标准测量装置的研究  

Standard Apparatus of NIM for Measurements of Optical Fiber Refractive Index Profiles and Geometric Parameters

作　　者：李天初[1] 方毓文[1] 王民明[1] 方占军[1] 谭小地[2] 

机构地区：[1]中国计量科学研究院 [2]西安工业学院

出　　处：《计量学报》1992年第2期81-87,共7页Acta Metrologica Sinica

摘　　要：介绍了中国计量科学研究院建立的光纤折射率分布和几何参数标准测量装置。该装置采用“光反馈激光开关干涉-计算机光功率细分”测量微位移,并采用“干涉逼近法”和“插值法”测量折射率差的方法,分别使光纤的几何参数测量和折射率差测量溯源到He-Ne激光波长。测量光纤皮径和芯径的不确定度(2σ)分别为±0.25μm和±0.5μm。测量折射率的不确定度达到±2×10^(-3)。A standard measuring apparatus of optical fiber refractive index profiles and geometric parameters has been established in NIM.In this paper the principle,characteristics of the apparatus and results of measurements are given.The 'optical feedback flip-flop laser interferometer-computer sub-division of optical power' was used to measuer the scanning displacement and the 'interferometric approach-interpolating method' was used to determine the refractive index of matching liquid and fiber cladding.So all measurements are traceable to the He-Ne laser wavelength.The measuring uncertainties(2σ)are.025μm for the cladding diameter;0.5μm for the Core diameter 2×10-3 for the refractive index difference.

关 键 词：光纤 折射率 测量装置 光导纤维 

分 类 号：TN25[电子电信—物理电子学]