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    • 2. 发明授权
    • Optical time domain reflectometer
    • 光时域反射仪
    • US07880868B2
    • 2011-02-01
    • US12239324
    • 2008-09-26
    • Shouichi Aoki
    • Shouichi Aoki
    • G01N21/00
    • G01M11/3127
    • An improvement is added to an optical time domain reflectometer for emitting pulsed light of invisible light to a measured optical fiber, receiving return light of the pulsed light by a light detection section, measuring the measured optical fiber, and emitting visible light for visible inspection of a fault point of the measured optical fiber to the measured optical fiber. The optical time domain reflectometer includes an incidence-emission port for emitting the invisible light and the visible light to the measured optical fiber and an output judgment section for judging that a communication light exists in the measured optical fiber based on the light power of the light detection section receiving light incident through the incidence-emission port in a state in which the pulsed light of the invisible light is not emitted.
    • 光学时域反射计的改进是向被测光纤发射不可见光的脉冲光,通过光检测部分接收脉冲光的返回光,测量测量的光纤,并发出可见光以进行可视检查 测量光纤到测量光纤的故障点。 光时域反射计包括用于将不可见光和可见光发射到测量光纤的入射发射端口和用于基于光的光功率判断测量光纤中存在通信光的输出判断部分 在不发出不可见光的脉冲光的状态下,接收通过入射发射口入射的光的检测部。
    • 3. 发明授权
    • Apparatus and method for measuring characteristics of optical fibers
    • 光纤特性测量装置及方法
    • US07180582B2
    • 2007-02-20
    • US10863883
    • 2004-06-08
    • Tetsuo YanoEmiko FujiwaraShouichi Aoki
    • Tetsuo YanoEmiko FujiwaraShouichi Aoki
    • G01N21/00
    • G01M11/3181G01N21/23
    • An apparatus and method for accurate measurement of characteristics of optical fibers (distribution of polarization mode dispersion and distribution of magnitude of birefringence). Pulse light is inputted to a subject optical fiber, back scattered light of the pulse light from the subject optical fiber is detected by a photodetector to find a Stokes vector, and polarization mode dispersion in a longitudinal direction is measured. The apparatus comprises a light source unit for outputting the pulse light having at least three different angular frequencies, and an arithmetic operation unit for calculating the magnitude of linear polarization components and the magnitude of a circular polarization component of a polarization dispersion vector on the basis of the Stokes vector and thus calculating polarization mode dispersion.
    • 用于精确测量光纤特性的装置和方法(偏振模色散的分布和双折射大小分布)。 脉冲光被输入到目标光纤中,由光电检测器检测来自目标光纤的脉冲光的反向散射光,以找到斯托克斯矢量,并测量纵向上的偏振模色散。 该装置包括用于输出具有至少三个不同角频率的脉冲光的光源单元和用于基于以下方式计算偏振分散向量的线性偏振分量的大小和偏振分散矢量的大小的算术运算单元 斯托克斯矢量,从而计算偏振模色散。
    • 4. 发明申请
    • Apparatus and method for measuring characteristics of iptical fibers
    • 用于测量光纤特性的装置和方法
    • US20050018174A1
    • 2005-01-27
    • US10863883
    • 2004-06-08
    • Tetsuo YanoEmiko FujiwaraShouichi Aoki
    • Tetsuo YanoEmiko FujiwaraShouichi Aoki
    • G01M11/02G01M11/00G01N21/23G01N21/00
    • G01M11/3181G01N21/23
    • An apparatus and method for measuring characteristics of optical fibers that enable accurate measurement of characteristics of optical fibers (distribution of polarization mode dispersion and distribution of magnitude of birefringence) are to be realized. This invention is an improvement of an optical fiber characteristics measuring apparatus in which pulse light is inputted to a subject optical fiber, back scattered light of the pulse light from the subject optical fiber is detected by a photodetector to find a Stokes vector, and polarization mode dispersion in a longitudinal direction is measured. The apparatus comprises a light source unit for outputting the pulse light having at least three different angular frequencies, and an arithmetic operation unit for calculating the magnitude of linear polarization components and the magnitude of a circular polarization component of a polarization dispersion vector on the basis of the Stokes vector and thus calculating polarization mode dispersion.
    • 可以实现用于测量光纤特性的精确测量(偏振模色散分布和双折射大小分布)的光纤特性的装置和方法。 本发明是将脉冲光输入到被摄体光纤的光纤特性测量装置的改进,由光检测器检测来自对象光纤的脉冲光的反向散射光,以找到斯托克斯矢量,并且偏振模式 测量纵向的分散。 该装置包括用于输出具有至少三个不同角频率的脉冲光的光源单元和用于基于以下方式计算偏振分散向量的线性偏振分量的大小和偏振分散矢量的大小的算术运算单元 斯托克斯矢量,从而计算偏振模色散。