JPS6465938A - Method for monitoring change of light loss in optical transmission line - Google Patents
Method for monitoring change of light loss in optical transmission lineInfo
- Publication number
- JPS6465938A JPS6465938A JP22274487A JP22274487A JPS6465938A JP S6465938 A JPS6465938 A JP S6465938A JP 22274487 A JP22274487 A JP 22274487A JP 22274487 A JP22274487 A JP 22274487A JP S6465938 A JPS6465938 A JP S6465938A
- Authority
- JP
- Japan
- Prior art keywords
- transmission line
- monitoring signal
- optical transmission
- signal
- light loss
- 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.)
- Pending
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
-
- 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
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/077—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using a supervisory or additional signal
- H04B10/0775—Performance monitoring and measurement of transmission parameters
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2210/00—Indexing scheme relating to optical transmission systems
- H04B2210/07—Monitoring an optical transmission system using a supervisory signal
- H04B2210/078—Monitoring an optical transmission system using a supervisory signal using a separate wavelength
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Communication System (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
PURPOSE:To measure the loss of a optical transmission line while it is used for communication, by coupling a monitoring signal having a different wavelength by using an optical multiplexing/demultiplexing element, and separating the monitoring signal according to the wavelength at an emission end, and obtaining the change of a light loss of the optical transmission line from the level change of the separated monitoring signal. CONSTITUTION:A transmission, equipment outgoing part 3 which outputs a transmission signal of the wavelength lambda1, a monitoring signal light source 5 which outputs the monitoring signal of wavelength lambda2 different from the wavelength lambda1, and the light multiplexing/ demultiplexing element 2 which multiplexes the transmission signal and the monitoring signal and sends it to the optical transmission line 1 from a junction point 7, are provided. Further, at the emission end of the optical transmission line 1, the light multiplexing/demultiplexing element 2' which is connected to the optical transmission line 1 at the junction point 7' and separates the transmission signal and the monitoring signal according to the wavelengths, a transmission device receiving part 4 which receives the transmission signal, and a monitoring signal receiving part 6 which obtains the change of the light loss of the optical transmission line 1 from the level change of the separated monitoring signal, are provided. Thus, the change of the light loss of the optical transmission line can be monitored simultaneously while the transmission signal is transmitted. Therefore, it is not necessary to interrupt a service for measuring the light loss, and the transmission line can be always monitored.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22274487A JPS6465938A (en) | 1987-09-04 | 1987-09-04 | Method for monitoring change of light loss in optical transmission line |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22274487A JPS6465938A (en) | 1987-09-04 | 1987-09-04 | Method for monitoring change of light loss in optical transmission line |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6465938A true JPS6465938A (en) | 1989-03-13 |
Family
ID=16787224
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP22274487A Pending JPS6465938A (en) | 1987-09-04 | 1987-09-04 | Method for monitoring change of light loss in optical transmission line |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6465938A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2694148A1 (en) * | 1992-07-03 | 1994-01-28 | Ericsson Telefon Ab L M | Method and device for monitoring branched optical line networks |
EP0693831A1 (en) * | 1992-10-22 | 1996-01-24 | Laser Precision Corporation | Method of detecting breaks in multi-drop feeder system |
-
1987
- 1987-09-04 JP JP22274487A patent/JPS6465938A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2694148A1 (en) * | 1992-07-03 | 1994-01-28 | Ericsson Telefon Ab L M | Method and device for monitoring branched optical line networks |
EP0693831A1 (en) * | 1992-10-22 | 1996-01-24 | Laser Precision Corporation | Method of detecting breaks in multi-drop feeder system |
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