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    • 9. 发明授权
    • Method and apparatus for measuring wavelength dispersion value and/or nonlinear coefficient of optical fibers
    • 用于测量光纤的波长色散值和/或非线性系数的方法和装置
    • US06771360B2
    • 2004-08-03
    • US10304908
    • 2002-11-26
    • Keisuke Kawabata
    • Keisuke Kawabata
    • G01N2100
    • G01M11/33G01M11/338
    • A method and an apparatus for measuring wavelength dispersion value and/or nonlinear coefficient of optical fibers which realize high accurate nonlinear coefficient and wavelength dispersion value without influence of emitting power at measurement, length of test optical fiber, wavelength spacing of light source, and varying wavelength dispersion value of light source are provided. An apparatus is comprising a spectrum analyzer for measuring four wave mixing optical intensity generated in test optical fiber by emitting pump light and signal light to test optical fiber for each peak wavelength spacing, and for measuring optical intensity of a plurality of line spectrum constituting pump light and a plurality of line spectrum constituting signal light respectively, and an operating circuit for obtaining nonlinear coefficient and/or wavelength dispersion value by calculating so that maximum value of four wave mixing optical intensity in each spectrum wavelength spacing calculated from optical strength of line spectrum of pump light and signal light measured by spectrum analyzer coincides with measured value of four wave mixing optical intensity in each spectrum wavelength spacing measured by spectrum analyzer.
    • 用于测量光纤的波长色散值和/或非线性系数的方法和装置,其实现高精度非线性系数和波长色散值,而不受测量时发射功率的影响,测试光纤的长度,光源的波长间隔以及变化 提供光源的波长色散值。 一种装置包括:频谱分析仪,用于通过发射泵浦光和信号光测量在测试光纤中产生的四个波混频光强度,以测试每个峰值波长间隔的光纤,并测量构成泵浦光的多个线谱的光强度 以及分别构成信号光的多个线谱,以及用于通过计算获得非线性系数和/或波长色散值的操作电路,使得由每个光谱波长间隔的光强度的四个波混合光强度的最大值 由光谱分析仪测量的泵浦光和信号光与频谱分析仪测得的每个光谱波长间隔的四波混频光强度的测量值相一致。