公开(公告)号：US09752955B2

公开(公告)日：2017-09-05

申请号：US14755057

申请日：2015-06-30

Applicant: II-VI Incorporated

Inventor： Aravanan Gurusami ,  Timothy Zahnley ,  Scott Dahl ,  Deepak Devicharan ,  Ian Peter McClean

IPC: G01N21/00 ,  G01B9/02 ,  G01J3/28 ,  G02B6/26 ,  H04B10/08 ,  G01M11/00

CPC classification number: G01M11/3109 ,  G01M11/3145

Abstract: An OTDR system utilizes a laser source that is turned “on” and kept powered until its light reaches the end of the fiber span being measured (i.e., until the fiber span is fully illuminated). At any point in time after the fiber is fully illuminated, the laser source can be turned “off”. The return (reflected and backscattered) signal is directed into a photodetector of the OTDR, and is measured from the point in time when the fiber span starts to be illuminated. The measurements are made by sampling the return signal at predetermined time intervals—defined as the sampling rate. The created power samples are then subjected to post-processing in the form of a differentiation operation to create a conventional OTDR trace from the collected data.

公开(公告)号：US20160033359A1

公开(公告)日：2016-02-04

申请号：US14755057

申请日：2015-06-30

Applicant: II-VI Incorporated

Inventor： Aravanan Gurusami ,  Timothy Zahnley ,  Scott Dahl ,  Deepak Devicharan ,  Ian Peter McClean

IPC: G01M11/00

CPC classification number: G01M11/3109 ,  G01M11/3145

Abstract: An OTDR system utilizes a laser source that is turned “on” and kept powered until its light reaches the end of the fiber span being measured (i.e., until the fiber span is fully illuminated). At any point in time after the fiber is fully illuminated, the laser source can be turned “off”. The return (reflected and backscattered) signal is directed into a photodetector of the OTDR, and is measured from the point in time when the fiber span starts to be illuminated. The measurements are made by sampling the return signal at predetermined time intervals—defined as the sampling rate. The created power samples are then subjected to post-processing in the form of a differentiation operation to create a conventional OTDR trace from the collected data.

Abstract translation: OTDR系统利用被打开的激光源并保持供电，直到其光达到被测量的光纤跨度的端部（即，直到光纤跨度被完全照明为止）。 在光纤完全照明后的任何时间点，激光源都可以被关闭。 返回（反射和反向散射）信号被引导到OTDR的光电检测器中，并且从纤维跨度开始被照亮的时间点测量。 通过以定义为采样率的预定时间间隔对返回信号进行采样来进行测量。 然后将所创建的功率样本以分化操作的形式进行后处理，以从收集的数据创建常规的OTDR迹线。

公开(公告)号：US10564068B2

公开(公告)日：2020-02-18

申请号：US15641951

申请日：2017-07-05

Applicant: II-VI Incorporated

Inventor： Aravanan Gurusami ,  Timothy Zahnley ,  Scott Dahl ,  Deepak Devicharan ,  Ian Peter McClean

IPC: G01N21/00 ,  G01M11/00

Abstract: An OTDR system utilizes a laser source that is turned “on” and kept powered until its light reaches the end of the fiber span being measured (i.e., until the fiber span is fully illuminated). At any point in time after the fiber is fully illuminated, the laser source can be turned “off”. The return (reflected and backscattered) signal is directed into a photodetector of the OTDR, and is measured from the point in time when the fiber span starts to be illuminated. The measurements are made by sampling the return signal at predetermined time intervals—defined as the sampling rate. The created power samples are then subjected to post-processing in the form of a differentiation operation to create a conventional OTDR trace from the collected data.

公开(公告)号：US20170307472A1

公开(公告)日：2017-10-26

申请号：US15641951

申请日：2017-07-05

Applicant: II-VI Incorporated

Inventor： Aravanan Gurusami ,  Timothy Zahnley ,  Scott Dahl ,  Deepak Devicharan ,  Ian Peter McClean

IPC: G01M11/00

Abstract: An OTDR system utilizes a laser source that is turned “on” and kept powered until its light reaches the end of the fiber span being measured (i.e., until the fiber span is fully illuminated). At any point in time after the fiber is fully illuminated, the laser source can be turned “off”. The return (reflected and backscattered) signal is directed into a photodetector of the OTDR, and is measured from the point in time when the fiber span starts to be illuminated. The measurements are made by sampling the return signal at predetermined time intervals—defined as the sampling rate. The created power samples are then subjected to post-processing in the form of a differentiation operation to create a conventional OTDR trace from the collected data.