CA2043946A1 - Optical time domain reflectometer - Google Patents

Optical time domain reflectometer

Info

Publication number
CA2043946A1
CA2043946A1 CA002043946A CA2043946A CA2043946A1 CA 2043946 A1 CA2043946 A1 CA 2043946A1 CA 002043946 A CA002043946 A CA 002043946A CA 2043946 A CA2043946 A CA 2043946A CA 2043946 A1 CA2043946 A1 CA 2043946A1
Authority
CA
Canada
Prior art keywords
loss
optical
path
time domain
optical fiber
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
CA002043946A
Other languages
French (fr)
Other versions
CA2043946C (en
Inventor
Vincent Choong So
Michel Lessard
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.)
Bell Canada Inc
Original Assignee
Vincent Choong So
Michel Lessard
Bell-Northern Research Ltd.
Bell Canada
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 Vincent Choong So, Michel Lessard, Bell-Northern Research Ltd., Bell Canada filed Critical Vincent Choong So
Priority to CA 2043946 priority Critical patent/CA2043946C/en
Publication of CA2043946A1 publication Critical patent/CA2043946A1/en
Application granted granted Critical
Publication of CA2043946C publication Critical patent/CA2043946C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

In an optical time domain reflectometer (OTDR), an optical signal is coupled to an optical fiber path to be tested, and back-scattered and reflected light from the optical fiber path is detected and used to determine loss-distance characteristics of the path. A control unit varies the wavelength of the optical signal by varying the temperature of a semiconductor laser constituting the optical source, so that the loss-distance characteristics for a plurality of different wavelengths are determined and can be displayed to show any wavelength dependent loss of the optical fiber path, which loss may be due to modal interference associated with closely spaced discontinuities in the path.
CA 2043946 1991-06-05 1991-06-05 Optical time domain reflectometer Expired - Lifetime CA2043946C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA 2043946 CA2043946C (en) 1991-06-05 1991-06-05 Optical time domain reflectometer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA 2043946 CA2043946C (en) 1991-06-05 1991-06-05 Optical time domain reflectometer

Publications (2)

Publication Number Publication Date
CA2043946A1 true CA2043946A1 (en) 1992-12-06
CA2043946C CA2043946C (en) 2003-06-17

Family

ID=4147740

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2043946 Expired - Lifetime CA2043946C (en) 1991-06-05 1991-06-05 Optical time domain reflectometer

Country Status (1)

Country Link
CA (1) CA2043946C (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2628740C1 (en) * 2016-11-22 2017-08-21 Российская Федерация, от имени которой выступает Государственная корпорация по атомной энергии "Росатом" Method for detecting local additional losses in optical fiber by background method
CN111487034A (en) * 2019-01-25 2020-08-04 安立股份有限公司 Optical time domain reflectometer and optical pulse testing method
CN112564780A (en) * 2020-11-18 2021-03-26 昂纳信息技术（深圳）有限公司 Device and method for reducing coherent noise of light source of optical time domain reflectometer

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102187603B (en) * 2008-10-17 2014-10-29 爱斯福公司 Method and apparatus for deriving parameters of optical paths in optical networks using a two-wavelength otdr and a wavelength-dependent reflective element

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2628740C1 (en) * 2016-11-22 2017-08-21 Российская Федерация, от имени которой выступает Государственная корпорация по атомной энергии "Росатом" Method for detecting local additional losses in optical fiber by background method
CN111487034A (en) * 2019-01-25 2020-08-04 安立股份有限公司 Optical time domain reflectometer and optical pulse testing method
CN111487034B (en) * 2019-01-25 2022-04-05 安立股份有限公司 Optical time domain reflectometer and optical pulse testing method
CN112564780A (en) * 2020-11-18 2021-03-26 昂纳信息技术（深圳）有限公司 Device and method for reducing coherent noise of light source of optical time domain reflectometer

Also Published As

Publication number Publication date
CA2043946C (en) 2003-06-17

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