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Introduction
The fiber optical cable monitoring system monitors the fiber optical cable and then judges whether the optical cable is in normal operation; when the abnormal situation occurs, alarms will be issued and corresponding tests will be sent. In addition, through the judgment of fault data the position where fault occurred can be accurately located, the faulty equipment and the reason causing the fault can be quickly ascertained.
The implementation process of the optical cable monitoring system is divided into three parts: information collection, summary and analysis, evaluation and diagnosis of equipment operation. Information is collected so that workers can know the status of monitoring status well.
The function of data collection will be lost if the collected data is not summarized and analyzed, the problems reflected by the data will not be found, and the internal rules will not be revealed, making it difficult to implement monitoring.
Evaluate and diagnose equipment performance. Since monitoring is the most basic maintenance activity, the ultimate goal of maintenance is to be able to evaluate and diagnose.
Structure
The optical cable monitoring system is mainly composed of monitoring center, RTU remote testing station and operation terminal. The remote monitoring station mainly includes optical time domain reflectometer OTDR, optical power monitoring OPM unit, optical switch OSW, etc. It is divided into monitoring unit and testing unit. The former mainly monitors the cable information, the latter mainly test the running status of cable. The Monitoring center is located in the control center of optical cable monitoring system, including monitoring network management systems and servers. The main function is to send test and switching commands to the optical time domain reflectometer and optical switch according to the received alarm from the tube power monitoring unit, and to accurately analyze and determine the fault point according to the feedback test results.
The operation terminal is the user's operation terminal for the whole system, including the PC terminal and corresponding software, which mainly provides convenient conditions for the user to maintain the line and find the fault point.
Monitoring Ways
OTDR positioning monitoring, optical power monitoring, and combination of OTDR positioning monitoring and optical power monitoring
OTDR positioning monitoring is through online monitoring and backup fiber monitoring. Online monitoring monitors the optical fibers.The WDM is split by the light waves, then the light from the OTDR is transmitted to the service fiber.The wavelength of the test light is transmitted to the unused port of the service fiber. For example, an optical fiber has a 1450nm port to transmit the service optical fiber data. The WDM can be multiplexed by 1300nm OTDR at the transmitter end. In this way, the optical fiber can be loaded with two light waves of different wavelengths at the same time and separated by WDM at the receiver end.
The principle of backup fiber monitoring is that the fiber pigtail is drawn from the OSW and connected to the ODF, where it is connected to the backup fiber. This kind of optical cable monitoring system only monitors the standby optical fibers, so the system price is relatively low.
Optical power monitoring is carried out using two monitoring stations. Set up an independent light source in the center of these two stations, set the detection mode of optical power in the detection station, and set the alarm threshold. When the optical power consumption exceeds the alarm threshold, an alarm signal will be generated to motivate the startup test and then determine the fault information.
The combination of the two refers to OTDR and optical power, so that the complementary advantages of the two can be used to operate the monitoring system and complete the information transmission function.
Conclusion
The rapid development of optical network makes it hard for the maintenance and labor now, it challenges the traditional maintenance and repair. Therefore, it is necessary to adopt the latest science and technology to manage the information transmission of monitoring system, observe the optical fiber in a dynamic way, find out the failure time and fault location accurately, and ensure the effective transmission of communication information.
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What about Cable Monitoring System?
GLSUN optical cable monitoring system, combined with OTDR, optical switch, and upper-level network management software, form a systematic and intelligent system integrating functions of testing, analysis, alarm, positioning, information management, and worksheet. It features high integration density, strong commonality, abundant product form, and flexible upgrading and expansion. Fiber In-Service Monitoring Light sources of different wavelengths will not interfere with each other in the transmission process in optical fiber. Based on this principle, we combine the service light [wavelength 1550] and test light [wavelength 1650] for transmission, so that the quality of optical fiber can be monitored without interruption of service. Spare Fiber Monitoring Spare fiber monitoring is to inject the monitoring signal into the spare fiber and indirectly observe the loss of other fiber in the cable by monitoring the loss of the spare fiber. Since the monitoring signal goes through the spare optical fiber, passive device such as filter is not required, which can effectively reduce the installation process and cost of the system. Fiber Out-of-Service Monitoring Optical fiber out-of-service monitoring refers to monitoring the original communication optical fiber in the condition that communication equipment is interrupted. Therefore, passive devices such as filter are not required, which can effectively reduce the installation process and system cost of the system. The disadvantage is that communication equipment needs to be interrupted. Application: Optical switch + OTDR Monitoring Scheme Optical power monitoring scheme can monitor the total loss of optical fiber, but it can not reflect the loss performance of optical fiber, nor can it find the fault of optical fiber. While OTDR can monitor the loss performance of the fiber. It can find the failure type and accurately by analyzing the OTDR curve. Since OTDR costs are relatively high, optical switch is needed to switch to different optical fibers, so as to reduce the cost of the whole system. By controlling the 1xN optical switch, the control unit starts the OTDR to test the optical fiber loss performance in turn. By analyzing the test curve of OTDR, the purpose of optical fiber monitoring is achieved. Application: Optical Power Detector + Optical Switch + OTDR Monitoring Scheme This scheme can effectively solve the problem of poor timeliness for fault report of optical switch + OTDR scheme. The optical power detector monitors the total loss of the optical fiber in real-time. If any abnormality is found, the control unit is informed to start and switch to the abnormal optical fiber and conduct OTDR fiber performance test. The alarm type and will be identified by analyzing OTDR curve. The control unit can also control the OTDR and optical switch for periodic tests and roll call tests. However, this scheme still has the problem of poor timeliness caused by OTDR polling in case of abnormality of multiple monitored fibers. Application: PON + Optical Switch + OTDR Monitoring Scheme With the development of FTTX, PON network monitoring and maintenance has been mentioned on the agenda by telecom operators or special network users. Glsun developed high sampling accurate OTDR module for PON monitoring. Reference from www dot glsunmall dot com
Describe refraction and reflection with respect to Fiber Optical Cable?
Describe refraction and reflection with respect to Fiber Optical Cable?
Which cable have less attenuation?
optical fiber
How can you define number of modes in optical fiber?
A definition on top of my head, it's the number of frequencies allowed to be carried by the Optical Fiber Cable, It depends on the Ko, thickness and Numerical Aperture of the Fiber Cable.
Explain about optical fiber types modes and configurations?
fiber cable dia meeter
What is cladding in an optical cable?
A layer of a glass surrounding the center fiber of a glass inside a fiber-optic cable is called cladding.
What the diffirence between Optical fiber cable G652 and G655?
G 655 used fiber long distance SM fiber G655, and G652 short distance used, G652 Nonzero fiber
What are the different types of cables in computing?
Coaxial cable, Optical fiber cable, Twisted Pair
Where did LS cable in china import the optical fiber perform?
korea
What are the principles of optical fiber cable?
Fiber Optic Cable is a thin glass cable in which data is transferred over via laser(s) that are shined through the glass media.
What is the latest technology in communications better than optical fiber?
submarine cable
What are the different network media that may be used for this network?
Optical Fiber Cable.
