CN1124550A - Monitoring device for optical waveguide transmission path - Google Patents
Monitoring device for optical waveguide transmission path Download PDFInfo
- Publication number
- CN1124550A CN1124550A CN94192260A CN94192260A CN1124550A CN 1124550 A CN1124550 A CN 1124550A CN 94192260 A CN94192260 A CN 94192260A CN 94192260 A CN94192260 A CN 94192260A CN 1124550 A CN1124550 A CN 1124550A
- Authority
- CN
- China
- Prior art keywords
- transmission path
- receiver
- monitoring device
- transmitter
- test pulse
- 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
Images
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
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2210/00—Indexing scheme relating to optical transmission systems
- H04B2210/08—Shut-down or eye-safety
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Communication System (AREA)
Abstract
The object of the invention is to provide a device for monitoring and re-connecting an optical waveguide transmission path, which can be used even at very high optical transmission powers without causing damage during the repair of the transmission path. The energy level of the test pulse is reduced to a safe level. To detect the test pulses, a highly sensitive detector must be used on the receiver side. Such a monitoring device can be used, for example, in the case of long-range transmission with a fiber amplifier as a post-amplifier.
Description
The present invention relates to a kind of device of monitoring light-guide transmission section of the feature with claim 1 preamble.
Can recognize the situation of this device from Deutsche Bundespatent 3942817A1.When light-guide transmission section interrupted, this device used the test pulse of the short duration that sends with all period interval.
The pulse duration of test pulse and the time interval thereof are definite like this, even after integration after a while, the power that is transmitted reduces, thereby in the process of maintenance transmission path, human eye can not be subjected to prestige association.G.958, CCITT has listed the detailed rules and regulations of this respect in number suggestion.
The application of novel optical fiber amplifier has improved the light intensity in the light-guide transmission section greatly.But the transient process when connecting owing to laser transmitter, the pulse duration of test pulse can not be chosen the degree of any weak point, thereby again can not use the above-mentioned method for monitoring of German patent DE 3942817A1 here.
The purpose of this invention is to provide described the sort of device of this specification beginning,, and in the light-guide transmission section maintenance process, can not produce the healthy risk that victimizes under high through-put power even this device also can be used.According to the present invention, this purpose is that the characteristics by claim 1 realize.From appended claims, can see some useful embodiment of the present invention.
Device of the present invention has been arranged, and transmission path is disturbing (for example interrupting) putting into operation again automatically after eliminating, even can overhaul under high optical transmission power, during can determine the parameter (pulse duration, the time interval) of test pulse temporarily.
In the accompanying drawing of signal one embodiment of the present of invention have been shown, have described with regard to this embodiment below.
The first and second transmitter S1, the S2 first and second receiver E1, E2 and two light-guide transmission sections that fiber waveguide is LWL1 and LWL2 as we can see from the figure.Fiber waveguide LWL1 is connected to receiver E2 with transmitter S1, and fiber waveguide LWL2 is connected to receiver E1 with transmitter S2, so that transmitting optical signal.In high luminous power lower-pilot, this laser diode that for example is connected to fiber amplifier by the downstream is realized the purpose handled by transmitter S1 and S2 for fiber waveguide LWL1 and LWL2.
Owing to disturb U (for example interrupting) to make signal not send to receiver E2 from transmitter S1.So since receiver E2 in never again light signal be deposited with wherein, the light-guide transmission section supervising device is just turned off transmitter S2.Equally, because receiver E1 again can not receive any light signal, supervising device is just turned off transmitter S1.At this moment just can overhaul light-guide transmission section and unlikely human eye is caused prestige association.
For light-guide transmission section is put into operation after interference eliminated automatically again, supervising device impels transmitter S1 and S2 for example to send the optical tests pulse by means of some timers.These test pulses begin to send with the speed of a pulse of about per minute from interference, and pulse duration was about for 2 seconds.
The level of described pulse can for example drop to such degree by reducing the laser diode modulated current, makes when pulse accumulation and time-out no longer human eye to be worked the mischief.But this level again is not enough to transmit data usually, at this moment only need be used for detecting test pulse.
For detecting the test pulse of receiver side, except that broadband reception letter machine, also must adopt the sensitive detectors of low-response speed and little bandwidth, because because the decay in the fiber waveguide (particularly under the situation of long distance range transmission), test pulse may drop on the detectable limit.For example, can adopt integrated signal detector or upstream to be connected with the signal detector of narrow band filter.
If disturb U to eliminate and two fiber waveguide LWL
1And LWL
2Perfect, light-guide transmission section will resume operation and transmission of data signals automatically.This reaches by interconnect two receiver E1 and E2 and interconnection transmitter S1 and S2: if test pulse arrives some receiver E1, E2, this receiver just impel relevant transmitter S1, and S2 also sends test pulse.Eliminate now since disturb, test pulse just can arrive two receiver E1, E2, so two transmitters put into operation.Automatically the accurate mode of operation that puts into operation has introduction among the Deutsche Bundespatent 3942817A1.
If light-guide transmission section has some intermediate regenerators, then supervising device suitably can be expanded; Each intermediate regenerator can send and detect test pulse.Under noisy situation, supervising device is turned off corresponding reciprocal transmitter, and impels described transmitter to send test pulse.Eliminated already if disturb, the transmitter of route segment just resumes operation.
The transmitter of this light-guide transmission section can be for example to have laser diode or the optical output power high laser of fiber amplifier as post amplifier.
Claims (3)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP4317863.4 | 1993-05-28 | ||
| DE4317863A DE4317863C2 (en) | 1993-05-28 | 1993-05-28 | Arrangement for monitoring an optical fiber transmission link |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1124550A true CN1124550A (en) | 1996-06-12 |
Family
ID=6489182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94192260A Pending CN1124550A (en) | 1993-05-28 | 1994-05-20 | Monitoring device for optical waveguide transmission path |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0700606A1 (en) |
| CN (1) | CN1124550A (en) |
| DE (1) | DE4317863C2 (en) |
| WO (1) | WO1994028647A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008017213A1 (en) * | 2006-08-04 | 2008-02-14 | Zte Corporation | An intellectualized line condition detection and protection apparatus and method for high powered output device |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19825876B4 (en) * | 1998-06-10 | 2006-01-12 | Thorlabs Gmbh | Arrangement and method for PMD measurement on laid fiber sections |
| DE19934498C2 (en) * | 1999-07-22 | 2001-11-29 | Siemens Ag | Circuit arrangement and method for detecting an interruption in an optical fiber link |
| SE519731C2 (en) * | 2000-09-29 | 2003-04-01 | Transmode Systems Ab | A transmitter-receiver device, and a communication system with optical communication monitoring |
| US6845189B2 (en) | 2000-11-15 | 2005-01-18 | Telefonaktiebolaget Lm Ericsson (Publ) | System and a method for limiting the maximum of light transmitted from a ribbon fiber |
| SE517754C2 (en) * | 2000-11-15 | 2002-07-09 | Ericsson Telefon Ab L M | Device link and method for controlling communication links |
| US7495765B2 (en) | 2001-05-17 | 2009-02-24 | Thorlabs Gmbh | Fiber polarimeter, the use thereof, as well as polarimetric method |
| EP1262752B1 (en) | 2001-05-17 | 2005-08-03 | THORLABS GmbH | Fiber polarimeter, its use, and polarimetric method |
| DE102007043915A1 (en) * | 2007-09-14 | 2009-03-19 | Robert Bosch Gmbh | Laser device and operating method for this |
| EP2819322B1 (en) * | 2013-06-28 | 2018-04-04 | Deutsche Telekom AG | Automated error response for an optical transmission system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2751645C3 (en) * | 1977-11-18 | 1980-08-14 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Method for monitoring communication systems with optical fibers |
| DE3147555A1 (en) | 1981-12-01 | 1983-06-09 | Siemens AG, 1000 Berlin und 8000 München | Circuit arrangement for monitoring an optical transmission path |
| DE3340427C2 (en) * | 1983-11-09 | 1985-10-03 | Wandel & Goltermann Gmbh & Co, 7412 Eningen | Method for the safe operation of a device that contains a laser and a light-emitting interface that can be connected to a transmission medium, as well as a safety device for carrying out this method |
| DE3942817A1 (en) * | 1989-12-23 | 1991-06-27 | Ant Nachrichtentech | Terminal appts. for message transmission over optical fibres - guards against laser radiation hazard from broken fibre by automatic opening and reclosure of safety switch |
| US5136410A (en) * | 1990-01-09 | 1992-08-04 | Ibm Corporation | Optical fiber link control safety system |
-
1993
- 1993-05-28 DE DE4317863A patent/DE4317863C2/en not_active Expired - Lifetime
-
1994
- 1994-05-20 EP EP94915046A patent/EP0700606A1/en not_active Withdrawn
- 1994-05-20 WO PCT/DE1994/000583 patent/WO1994028647A1/en not_active Ceased
- 1994-05-20 CN CN94192260A patent/CN1124550A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008017213A1 (en) * | 2006-08-04 | 2008-02-14 | Zte Corporation | An intellectualized line condition detection and protection apparatus and method for high powered output device |
Also Published As
| Publication number | Publication date |
|---|---|
| DE4317863C2 (en) | 1997-08-21 |
| DE4317863A1 (en) | 1994-12-01 |
| EP0700606A1 (en) | 1996-03-13 |
| WO1994028647A1 (en) | 1994-12-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1124550A (en) | Monitoring device for optical waveguide transmission path | |
| EP1023587B1 (en) | Side-tone otdr for in-service optical cable monitoring | |
| CN112046545B (en) | A track circuit status intelligent diagnosis and processing system | |
| CA2062665A1 (en) | Optical-fibre telecommunications line with protection device for optical amplifiers | |
| EP0748068A3 (en) | A light signal reception apparatus having an improved light surge eliminating function | |
| SE462544B (en) | LJUSBAAGSRELAE | |
| EP0558561A1 (en) | Test apparatus | |
| ATE183348T1 (en) | DEVICE AND METHOD FOR MONITORING THE POWER LOSS OF A TRANSMISSION SYSTEM | |
| EP0390417A3 (en) | Spread-spectrum identification signal for communications systems | |
| EP0957375A3 (en) | Lightwave distance measuring apparatus and method | |
| MX172192B (en) | ISOLATION OF AGC INFORMATION IN TDMA SYSTEMS | |
| EP1227606A4 (en) | OPTICAL TRANSMITTING DEVICE AND OPTICAL REPEATING DEVICE | |
| EP0784388A3 (en) | Surveillance method of optical communication line | |
| CA2096151A1 (en) | Performance Monitoring and Fault Location for Optical Equipment, Systems and Networks | |
| EP0371445A3 (en) | Transmission line monitoring system | |
| EP0368282A3 (en) | A bidirectional optical transmission system having a light-interruption detecting function | |
| US5260765A (en) | Beam alignment apparatus and method | |
| US5085508A (en) | Beam alignment apparatus and method usable with projected beam smoke detector systems | |
| SE441867B (en) | PROCEDURE AND DEVICE FOR SEATING THE POWER OF INCIDENTAL LIGHT | |
| CA2005607A1 (en) | Method of analyzing guided optics components, optical fibres or optical guide networks by time reflectometry and reflectometer in the time sphere | |
| DE60214646D1 (en) | Method and device for monitoring an optical transmission path | |
| ATE187553T1 (en) | MEASURING METHOD ON AN OPTICAL FIBER | |
| CN109357693A (en) | A detection system and method for low reflection energy fiber grating | |
| CN116990820A (en) | Railway section construction protection method and system based on ultrasonic waves | |
| CA2359251A1 (en) | Sensor and method for detecting changes in distance |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |