JPS6479637A - Detection of position of defect and of open end of optical fiber - Google Patents

Detection of position of defect and of open end of optical fiber

Info

Publication number
JPS6479637A
JPS6479637A JP23813887A JP23813887A JPS6479637A JP S6479637 A JPS6479637 A JP S6479637A JP 23813887 A JP23813887 A JP 23813887A JP 23813887 A JP23813887 A JP 23813887A JP S6479637 A JPS6479637 A JP S6479637A
Authority
JP
Japan
Prior art keywords
vtau
difference
determined
defect
difference value
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP23813887A
Other languages
Japanese (ja)
Other versions
JPH0579134B2 (en
Inventor
Shinichi Furukawa
Mitsuhiro Tatsuta
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP23813887A priority Critical patent/JPS6479637A/en
Publication of JPS6479637A publication Critical patent/JPS6479637A/en
Publication of JPH0579134B2 publication Critical patent/JPH0579134B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Light Guides In General And Applications Therefor (AREA)
  • Testing Of Optical Devices Or Fibers (AREA)

Abstract

PURPOSE:To enable the setting of a cursor automatically and at a high accuracy with a optical pulse tester, by determining a difference in a back scattered power between two positions with a section range of vtau/2 as obtained when an optical pulse is sent with a pulse width (tau). CONSTITUTION:First, a difference is determined between positions separated by + or -vtau/4 with a desired position (z) as center on a back scattered waveform. Then, it is judged how the difference value varies with respect to a distance. Then, when the difference varies in steps, the position separated by vtau/4 from a changing point zB is determined to be the position of a defect or an open end. When the difference value does not vary in steps, a position zB is determined at which the difference value reaches the max. or the min. within a distance section where the difference value exceeds a specified value. Moreover, the position closer to the incident end side by vtau/4 from the zp is determined to be the position of the defect. This permits an operator of an optical pulse tester to set a cursor automatically and accurately.
JP23813887A 1987-09-22 1987-09-22 Detection of position of defect and of open end of optical fiber Granted JPS6479637A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23813887A JPS6479637A (en) 1987-09-22 1987-09-22 Detection of position of defect and of open end of optical fiber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23813887A JPS6479637A (en) 1987-09-22 1987-09-22 Detection of position of defect and of open end of optical fiber

Publications (2)

Publication Number Publication Date
JPS6479637A true JPS6479637A (en) 1989-03-24
JPH0579134B2 JPH0579134B2 (en) 1993-11-01

Family

ID=17025758

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23813887A Granted JPS6479637A (en) 1987-09-22 1987-09-22 Detection of position of defect and of open end of optical fiber

Country Status (1)

Country Link
JP (1) JPS6479637A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01141331A (en) * 1987-11-27 1989-06-02 Anritsu Corp Optical pulse tester
JP2008244664A (en) * 2007-03-26 2008-10-09 Nippon Telegr & Teleph Corp <Ntt> Method and system for monitoring optical line, and optical line monitoring device and program thereof
JP2008244663A (en) * 2007-03-26 2008-10-09 Nippon Telegr & Teleph Corp <Ntt> Method and system for monitoring optical line, and optical line monitoring device and program thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01141331A (en) * 1987-11-27 1989-06-02 Anritsu Corp Optical pulse tester
JP2008244664A (en) * 2007-03-26 2008-10-09 Nippon Telegr & Teleph Corp <Ntt> Method and system for monitoring optical line, and optical line monitoring device and program thereof
JP2008244663A (en) * 2007-03-26 2008-10-09 Nippon Telegr & Teleph Corp <Ntt> Method and system for monitoring optical line, and optical line monitoring device and program thereof

Also Published As

Publication number Publication date
JPH0579134B2 (en) 1993-11-01

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Legal Events

Date Code Title Description
EXPY Cancellation because of completion of term