JPH06509172A - 光学系における故障位置の決定 - Google Patents
光学系における故障位置の決定Info
- Publication number
- JPH06509172A JPH06509172A JP5502682A JP50268293A JPH06509172A JP H06509172 A JPH06509172 A JP H06509172A JP 5502682 A JP5502682 A JP 5502682A JP 50268293 A JP50268293 A JP 50268293A JP H06509172 A JPH06509172 A JP H06509172A
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- signal
- optical
- detector
- failure
- 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
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
- G01M11/31—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter and a light receiver being disposed at the same side of a fibre or waveguide end-face, e.g. reflectometers
- G01M11/3109—Reflectometers detecting the back-scattered light in the time-domain, e.g. OTDR
- G01M11/3154—Details of the opto-mechanical connection, e.g. connector or repeater
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/071—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using a reflected signal, e.g. using optical time domain reflectometers [OTDR]
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optical Communication System (AREA)
- Locating Faults (AREA)
Abstract
Description
Claims (9)
- 1.動作モードおよび故障モードを有する光信号用プロセッサ手段において、 前記動作モードにおいて光信号に増幅を行い、前記故障モードにおいてファイバ 故障点までの距離の測定のための光学的時間ドメイン反射計測を行い、光学的時 間ドメイン反射計測の手段は故障が推測されたファイバに光パルスを送信する手 段、および前記ファイバから反射された放射の強度および前記パルスの送信から 経過した時間を記憶する手段を具備し、前記プロセッサはレーザ動作によって光 信号を増幅するファイバ増幅器および前記動作モードを駆動するために前記ファ イバ増幅器にポンプ放射を供給するポンプレーザを具備し、前記ポンプレーザが 前記光学的時間ドメイン反射計測手段を駆動するために前記ファイバにパルスを 供給するように構成されているプロセッサ手段。
- 2.増幅された光信号の強度を測定する自動利得制御(AGC)検出器および反 射された光学的時間ドメイン反射計測放射の強度を測定する光学的時間ドメイン 反射計測検出器を含み、前記ファイバ増幅器が前記AGC検出器と前記光学的時 間ドメイン反射計測検出器との間に位置され、前記プロセッサ手段が動作上前記 AGC検出器および前記ポンプレーザに接続されて前記ポンプレーザに供給され るパワーを調節することによって自動利得制御を行う制御装置を含み、増幅され た信号の強度がしきい値より低下するときに前記制御装置が故障モードに切替わ るように構成され、前記故障モードにおいて、前記制御装置が光学的時間ドメイ ン反射計測パルスを前記ポンプレーザに送信させ、前記制御装置が前記光学的時 間ドメイン反射計測検出器によって測定される反射した信号の強度および検出の 時間を監視するように構成されている請求項1記載のプロセッサ手段。
- 3.前記ポンプレーザがデータ送信に使用される高い周波数で光学的時間ドメイ ン反射計測パルスを送信する請求項2記載のプロセッサ手段。
- 4.請求項1乃至3のいずれか1項記載の少なくとも1つの信号プロセッサを含 む海中中継器。
- 5.半分が1方向における信号を処理し、もう半分が反対方向における信号を処 理する偶数の前記信号プロセッサを含む請求項4記載の海中中継器。
- 6.請求項4または5記載の中継器の縦続接続を含む海中ケーブルシステム。
- 7.通信システムの光ファイバ形成部分における故障の位置を決定する方法にお いて、中継器手段を使用し、この中継器手段は、動作モードにおいて増幅された 光データ信号の強度を検出し、このような信号強度が予め定められたしきい値よ り低下するときに故障モードに切替わり、故障モードが光学的時間ドメイン反射 計測光パルスを送信するためにポンプレーザを使用し、反射された光学的時間ド メイン反射計測パルスを検出し、強度およびそれらの送信から経過した時間を測 定し、それによってファイバにおける故障の位置を決定する方法。
- 8.データ信号の送信に通常使用されるポンプレーザが故障モードで動作するこ とが可能であり、データ送信モード時よりも非常に高いパワーで動作する請求項 7記載の方法。
- 9.海中ケーブルにおける故障の位置を決定するために使用される請求項7また は8記載の方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB919115453A GB9115453D0 (en) | 1991-07-18 | 1991-07-18 | Fault location in optical systems |
GB9115453.4 | 1991-07-18 | ||
PCT/GB1992/001310 WO1993002344A1 (en) | 1991-07-18 | 1992-07-17 | Fault location in optical systems |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH06509172A true JPH06509172A (ja) | 1994-10-13 |
JP3148240B2 JP3148240B2 (ja) | 2001-03-19 |
Family
ID=10698516
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP50268293A Expired - Fee Related JP3148240B2 (ja) | 1991-07-18 | 1992-07-17 | 光学系における故障位置の決定 |
Country Status (8)
Country | Link |
---|---|
US (1) | US5528404A (ja) |
EP (1) | EP0594741B1 (ja) |
JP (1) | JP3148240B2 (ja) |
AU (1) | AU665205B2 (ja) |
DE (1) | DE69208881T2 (ja) |
GB (1) | GB9115453D0 (ja) |
HK (1) | HK111297A (ja) |
WO (1) | WO1993002344A1 (ja) |
Families Citing this family (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5465143A (en) * | 1994-01-27 | 1995-11-07 | Antel Optronics Inc. | ADP switch and adjustable data acquisition window |
US5504617A (en) * | 1994-02-08 | 1996-04-02 | British Telecommunications Public Limited Company | Optical time domain reflectometry |
GB2292495B (en) * | 1994-08-17 | 1998-03-25 | Northern Telecom Ltd | Fault location in optical communication systems |
JP3512264B2 (ja) * | 1995-05-08 | 2004-03-29 | 富士通株式会社 | 光増幅装置 |
JPH0961862A (ja) * | 1995-08-23 | 1997-03-07 | Fujitsu Ltd | 光増幅器の制御装置 |
US5673142A (en) * | 1995-09-15 | 1997-09-30 | Lucent Technologies Inc. | Optical amplifier with internal input signal monitoring tap |
CA2193150A1 (en) * | 1996-02-23 | 1997-08-24 | Hossein Eslambolchi | Network restoration method |
US5790285A (en) * | 1996-05-21 | 1998-08-04 | Lucent Technologies Inc. | Lightwave communication monitoring system |
SE507501C2 (sv) * | 1996-10-08 | 1998-06-15 | Ericsson Telefon Ab L M | Anordning och förfarande för att öka tillförlitligheten i ett optiskt nätverk |
US5969833A (en) * | 1996-10-09 | 1999-10-19 | Tyco Submarine Systems Ltd. | Monitoring system using an optical side tone as a test signal |
CA2304280C (en) | 1997-09-29 | 2003-07-08 | Tollgrade Communications, Inc. | Frequency agile transponder |
US6246497B1 (en) | 1998-03-12 | 2001-06-12 | Net-Hopper Systems, Inc. | Active optical loop-back system |
JP2000101513A (ja) * | 1998-09-18 | 2000-04-07 | Nec Corp | 遠隔励起中継器及び遠隔励起中継方法 |
JP2001358392A (ja) * | 2000-06-13 | 2001-12-26 | Oki Electric Ind Co Ltd | 安全光移行制御方法および光ファイバ増幅器 |
JP3696517B2 (ja) * | 2001-03-16 | 2005-09-21 | 富士通株式会社 | 光伝送システム |
US6850360B1 (en) * | 2001-04-16 | 2005-02-01 | Bookham, Inc. | Raman amplifier systems with diagnostic capabilities |
US20040070750A1 (en) * | 2002-10-09 | 2004-04-15 | Iannelli John M. | Optical time domain reflectometry system and method |
US7505197B2 (en) * | 2003-03-13 | 2009-03-17 | Fujitsu Limited | Optical amplifier provided with control function of pumping light, and optical transmission system using the same |
JP4318938B2 (ja) * | 2003-03-13 | 2009-08-26 | 富士通株式会社 | 接続損失検出機能を備えた光増幅器 |
JP4822727B2 (ja) * | 2005-03-30 | 2011-11-24 | 富士通株式会社 | 波長多重伝送装置,漏洩光防止方法および波長多重通信システム |
EP1854959B1 (en) * | 2006-05-12 | 2008-07-30 | Services Pétroliers Schlumberger | Method and apparatus for locating a plug within the well |
CN102025416B (zh) | 2009-09-22 | 2013-12-04 | 华为技术有限公司 | 一种定位海缆故障的方法、中继器及通信系统 |
EP2323286B9 (en) | 2009-11-12 | 2016-06-08 | ADVA Optical Networking SE | Method of operating an optical transmission system, optical transmitter, and optical receiver |
US9831943B2 (en) * | 2013-12-17 | 2017-11-28 | Neptune Subsea Ip Limited | Repeater OTDR using repeater based raman pumps |
US9503181B2 (en) | 2015-01-06 | 2016-11-22 | Ii-Vi Incorporated | Rare earth-doped fiber amplifier with integral optical metrology functionality |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60177238A (ja) * | 1984-02-24 | 1985-09-11 | Mitsubishi Electric Corp | 光フアイバケ−ブルの折損検出装置 |
EP0331304B1 (en) * | 1988-03-04 | 1993-11-24 | BRITISH TELECOMMUNICATIONS public limited company | Amplification of optical signals |
US5083874A (en) * | 1989-04-14 | 1992-01-28 | Nippon Telegraph And Telephone Corporation | Optical repeater and optical network using the same |
AU5839290A (en) * | 1989-06-22 | 1991-01-08 | British Telecommunications Public Limited Company | Optical time domain reflectometry |
US5343286A (en) * | 1990-02-15 | 1994-08-30 | British Telecommunications Public Limited Company | OTDR having optically switched amplified output onto test fibre to suppress optical amplifier noise between OTDR pluses |
US5013907A (en) * | 1990-03-27 | 1991-05-07 | Tektronix, Inc. | Optical time domain testing instrument |
US5214728A (en) * | 1990-06-19 | 1993-05-25 | Sumitomo Electric Industries, Ltd. | Light communication system |
US5093568A (en) * | 1990-12-14 | 1992-03-03 | John Maycock | Monitoring system for fiber optic cables utilizing an OTDR for detection of signal loss and automatic location of faults in the cable |
-
1991
- 1991-07-18 GB GB919115453A patent/GB9115453D0/en active Pending
-
1992
- 1992-07-17 EP EP92915730A patent/EP0594741B1/en not_active Expired - Lifetime
- 1992-07-17 WO PCT/GB1992/001310 patent/WO1993002344A1/en active IP Right Grant
- 1992-07-17 US US08/182,042 patent/US5528404A/en not_active Expired - Lifetime
- 1992-07-17 AU AU23319/92A patent/AU665205B2/en not_active Ceased
- 1992-07-17 DE DE69208881T patent/DE69208881T2/de not_active Expired - Lifetime
- 1992-07-17 JP JP50268293A patent/JP3148240B2/ja not_active Expired - Fee Related
-
1997
- 1997-06-26 HK HK111297A patent/HK111297A/xx not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
GB9115453D0 (en) | 1991-09-04 |
DE69208881D1 (de) | 1996-04-11 |
US5528404A (en) | 1996-06-18 |
EP0594741A1 (en) | 1994-05-04 |
AU665205B2 (en) | 1995-12-21 |
DE69208881T2 (de) | 1996-08-14 |
HK111297A (en) | 1997-08-29 |
AU2331992A (en) | 1993-02-23 |
JP3148240B2 (ja) | 2001-03-19 |
EP0594741B1 (en) | 1996-03-06 |
WO1993002344A1 (en) | 1993-02-04 |
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