Optical fiber characteristic measuring apparatus, and optical fiber characteristic measuring method
    1.
    发明专利
    Optical fiber characteristic measuring apparatus, and optical fiber characteristic measuring method 有权
    光纤特性测量装置和光纤特性测量方法

    公开(公告)号:JP2014044129A

    公开(公告)日:2014-03-13

    申请号:JP2012187003

    申请日:2012-08-27

    IPC分类号: G01D5/353 G01M11/00

    摘要: PROBLEM TO BE SOLVED: To provide an optical fiber characteristic measuring apparatus and an optical fiber characteristic measuring method which are capable of improving spatial resolution more than conventional arts.SOLUTION: An intensity of x-polarized light can be reduced or increased at a specific frequency by subjecting the x-polarized light to intensity modulation by intensity modulation means synchronously with frequency modulation applied to the x-polarized light, so that an effective length of a Brillouin dynamic grating formed by the x-polarized light can be adjusted. As a result, a shape of a reflection spectrum of y-polarized light obtained by reflection on the Brillouin dynamic grating can be optimally adjusted, and thus spatial resolution in the y-polarized light can be improved.

    摘要翻译: 要解决的问题:提供一种比常规技术更能提高空间分辨率的光纤特性测量装置和光纤特性测量方法。解决方案:可以以特定频率降低或增加x偏振光的强度 通过与施加到x偏振光的频率调制同步地通过强度调制装置对x偏振光进行强度调制,从而可以调节由x偏振光形成的布里渊动态光栅的有效长度。 结果,可以最佳地调整通过在布里渊动态光栅上的反射获得的y偏振光的反射光谱的形状,从而可以提高y偏振光中的空间分辨率。

    Method and apparatus for testing optical fiber
    5.
    发明专利
    Method and apparatus for testing optical fiber 失效
    用于测试光纤的方法和装置

    公开(公告)号:JPS6195224A

    公开(公告)日:1986-05-14

    申请号:JP21782684

    申请日:1984-10-16

    IPC分类号: G01M11/00 G01M11/02

    CPC分类号: G01M11/3181

    摘要: PURPOSE:To perform the measurement of a loss characteristic with good accuracy by reducing fluctuation, by allowing a linearily polarized optical pulse to be incident to an optical fiber to be tested through a polarized wave maintaining optical fiber and detecting back scattering light through the polarization maintaining optical fiber. CONSTITUTION:The optical pulse emitted from a pulse light source 1 passes through a polarizer 2 for permitting only the passage of a polarized light component in a definite direction, an optical directional coupler 3 and an optical coupling means 4 to be incident to a polarized wave maintaining optical fiber 10 from a coupling point A being an incident terminal. A polarization direction is set to an angle of 10-32 deg. to one of two orthogonal main axes of the optical fiber 10. Further, the pulse is incident to an optical fiber 5 to be tested through an optical coupling means 11 and a coupling point B and back scattering light reaches the polarizer 6 of the passing axis crossing the polarizer 2 at right angles from the optical directional coupler 3 through the reverse route to be incident to a light detector 7. The output of the detector 7 is subjected to averaging processing by an operational processing apparatus 8 to be displayed on a display apparatus 9.

    摘要翻译: 目的:通过减少波动,以精确的方式进行损耗特性的测量,通过使线性偏振光脉冲入射到待测光纤上,通过维持光纤的偏振波进行检测,并通过偏振维持检测反射散射光 光纤。 构成:从脉冲光源1发射的光脉冲通过偏振器2,仅允许偏振光分量沿一定方向通过,光学定向耦合器3和光耦合装置4入射到偏振波 从作为入射端子的耦合点A维持光纤10。 极化方向设定为10-32度的角度。 到光纤10的两个正交主轴中的一个。此外,脉冲入射到光纤5以通过光耦合装置11和耦合点B进行测试,而后向散射光到达通过轴的偏振器6 将偏振器2从光学定向耦合器3穿过反向路径成直角地入射到光检测器7.检测器7的输出由操作处理装置8进行平均处理,以显示在显示装置上 9。

    Optical pulse tester for single mode optical fiber
    6.
    发明专利
    Optical pulse tester for single mode optical fiber 失效
    单模光纤光学测试仪

    公开(公告)号:JPS6159236A

    公开(公告)日:1986-03-26

    申请号:JP18214784

    申请日:1984-08-30

    申请人: Fujikura Ltd

    CPC分类号: G02B6/14 G01M11/3181

    摘要: PURPOSE:To enable stable measurement, by inserting a depolarizer between a polarizing separation prism and a single mode optical fiber to be measured and exciting the non-polarization of the single mode optical fiber to eliminate the polarization dependence of back scattering light. CONSTITUTION:An optical fiber depolarizer 9 comprising a constant polarization optical fiber is inserted between the polarizing separation prism 4 of a pulse tester and a single mode optical fiber 6 to be measured. The depolarizer 9 is constituted by connecting two long and short constant polarization optical fibers 22, 23 so as to incline both of them at a predetermined angle and respectively connecting the same to single mode optical fibers 21, 24 and the length La, Lb of both constant polarization optical fibers 22, 23 are set to predetermined values. By this method, the polarization dependence of back scattering light of the single mode optical fiber 6 to be measured is eliminated and the irregularity in a measured value can be eliminated.

    摘要翻译: 目的:为了稳定测量,通过在偏振分离棱镜和要测量的单模光纤之间插入消偏振器,激发单模光纤的非极化,消除背散射光的偏振依赖性。 构成:将包括恒定偏振光纤的光纤去偏振器9插入脉冲测试仪的偏振分离棱镜4和要测量的单模光纤6之间。 去偏振器9通过连接两个长和短的恒定偏振光纤22,23而以预定的角度倾斜两者,并将其分别连接到单模光纤21,24和两者的长度La,Lb 恒定偏振光纤22,23设定为规定值。 通过该方法,消除了待测量的单模光纤6的反向散射光的偏振度依赖性,并且可以消除测量值的不规则性。

    光ファイバセンサシステム
    9.
    发明专利

    公开(公告)号:JP2017227509A

    公开(公告)日:2017-12-28

    申请号:JP2016122903

    申请日:2016-06-21

    发明人: 大塚 節文

    IPC分类号: G01H9/00

    摘要: 【課題】微弱な音響信号を検知することができる光ファイバセンサシステムを提供すること。 【解決手段】測定光L1を出力する光源11と、ループ状の光経路21及びコイル22を有しコイル22に加えられた応力によって光経路21を通る光を変調させる変調部13と、測定光L1を入力して右回り光L2と左回り光L3とに分岐し干渉光L4を出力する光結合器12と、干渉光L4を入力し、干渉光L4を、偏光状態が互いに直交する第1成分L6及び第2成分L7に分離する偏光分離器15と、偏光分離器15と光学的に結合された第1偏光制御器14と、第1成分L6が入力する第1光検出器16aを有し第1成分L6を第1電気信号E1に変換して応力を検知する第1検出部16とを備える。第1偏光制御器14は、第1電気信号E1が応力に対して一次の応答を示すように、偏光分離器15に入力する光L5の偏光状態を制御する。 【選択図】図1