公开(公告)号：US07221439B2

公开(公告)日：2007-05-22

申请号：US11118302

申请日：2005-04-29

申请人： Xin Chen ,  Charles F. Laing ,  Ming-Jun Li ,  Sonya M. Raney

发明人： Xin Chen ,  Charles F. Laing ,  Ming-Jun Li ,  Sonya M. Raney

IPC分类号： G01N21/00

CPC分类号： G01M11/332 ,  G01M11/3163 ,  G01M11/338

摘要： A method for measuring longitudinal variation in chromatic dispersion in an optical fiber, comprising: (i) launching into a first end and a second end of optical fiber an optical signal at a wavelength λ1 to collect backscatter power P(z) for different positions z within said optical fiber and providing measured OTDR backscatter traces; (ii) deriving from the measured OTDR backscatter traces at the single OTDR wavelength λ1 either (a) the longitudinal MFD(z) data or (b) the relative MFD data; and (iii) calculating estimated longitudinal dispersion D(z) from the longitudinal MFD(z) data or the relative MFD data, without utilizing any other wavelength data.

摘要翻译： 一种用于测量光纤中色散的纵向变化的方法，包括：（i）向光纤的第一端和第二端发射波长为λ1的光信号以收集反向散射功率 P（z）用于所述光纤内的不同位置z，并提供测量的OTDR后向散射迹线; （ii）（a）纵向MFD（z）数据或（b）相对MFD数据在单个OTDR波长λ1下从所测量的OTDR反向散射迹线得出; 和（iii）从纵向MFD（z）数据或相对MFD数据计算估计的纵向色散D（z），而不使用任何其它波长数据。

公开(公告)号：US6125160A

公开(公告)日：2000-09-26

申请号：US359665

申请日：1999-07-26

申请人： William B. Gaylord ,  Charles F. Laing ,  William C. Peters ,  David O. Sheppard ,  David G. Smith ,  Edward G. Apple, Jr.

发明人： William B. Gaylord ,  Charles F. Laing ,  William C. Peters ,  David O. Sheppard ,  David G. Smith ,  Edward G. Apple, Jr.

IPC分类号： G21C17/06 ,  G21C19/00 ,  A45B3/08

CPC分类号： G21C17/06

摘要： The spacer envelope measurement system includes a generally U-shaped fixture having support plates extensible into positions overlying the spacer for supporting the fixture from the spacer. Extensible heads are carried by the fixture for engaging the spacer, followed by the heads of measurement gauges whereby, upon extending the heads into clamping engagement with the spacer along opposite sides thereof, the measurement gauges accurately determine the lateral dimensions of the irradiated spacer. A spacer bar clamp member is pivotal between positions opening the fixture opposite the base leg of the U-shaped fixture, enabling the bundle to reside within the U-shaped opening and a second position closing the opening for aligning the fixture and the bundle. The measurements are taken under water in a nuclear fuel service pool.

摘要翻译： 间隔包膜测量系统包括大致U形的固定装置，其具有可延伸到覆盖间隔件的位置的支撑板，用于从间隔件支撑夹具。 可伸缩头由用于接合间隔件的夹具承载，随后是测量计的头部，由此在将头部沿相对侧延伸到与间隔件夹紧接合时，测量计精确地确定照射的间隔件的横向尺寸。 间隔杆夹紧构件在打开与U形夹具的基部支脚相对的夹具的位置之间枢转，使得束可以位于U形开口内，而第二位置封闭开口以对准夹具和束。 测量在核燃料服务池中的水下进行。