TW200845611A - Device for monitoring optical fiber barrier of optical splitter network and method thereof - Google Patents

Abstract

A device for monitoring optical fiber barrier of optical splitter network and method thereof is provided. The monitoring device comprises of a wideband light source monitoring module, an optical circulator, an optical spectral analyzer, a high density multi-wavelength optical time domain reflector, a control computer, a wavelength division multiplexer, a specific wavelength optical filter, a monitoring band reflex component and an optical channel selector. It employs the monitoring device to combine the specific wavelength optical filter with the monitoring band reflex component where such combination provides the characteristics of filtering, reflecting and transmitting an input light. It is then applied to a passive optical networks with a plurality of splitter routers to create the device for monitoring optical fiber barrier of optical splitter network, and thereby achieves the goal of identifying the barrier split router and the barrier location simultaneously.

Description

200845611 IX. INSTRUCTIONS: [Technical Field] The present invention relates to an optical branching network optical fiber obstacle monitoring device and method, and particularly to a combination of a specific wavelength optical filter and a monitoring band reflection element, Features of removal, reflection and transmission for easy and efficient passive optical network fiber monitoring and measurement of obstacle locations. [Prior Art] With the rapid growth of the global Internet, traditional networks have been unable to cope with the demand for the Southspeed information transmission application caused by the communications revolution. The maturity of the optoelectronic industry technology and the diversification of product applications are timely and eager to grow. Global Internet, high-quality multimedia networks and a wide range of bandwidth required for various data communications provide the best solution. Therefore, various optical communication network architectures have emerged, among which passive optical network service systems are the most It is expected that in order to meet the monitoring needs of the special network architecture after the future use of this service system, it is necessary to invent devices and methods that can easily monitor the divergent routes of the passive optical network.

Passive optical networks have been difficult to perform fiber monitoring due to the innate architecture design of different routings. Previously, optical time domain reflectors (0pticalTimeD〇mainRefto_teA OTDR) were used for monitoring, but in the correction domain, all After the divergence, the signals are superimposed on the 'from the 'can not be separated from the other _ divergent route; for solving the problem, there is a silky identification at the end of the divergent route, but the fine-axis machine controls the computer interaction, often Increase the complexity of the monitoring system; also use the residual length fiber optic plus reflection unit as the identification component 'but because of the length of the divergent route, it has its complexity in design and installation; especially, this side uses the domain reflection As a way to monitor the main body, when the number of routing divergence increases, the monitoring target is difficult to achieve due to the limitation of the dynamic range (Dynamic Range) and the event blind area of the 200845611 optical time domain reflector. On the other hand, it is also useful for adjustable lasers (several secrets (four) light source, optical circulator, optical power meter and fiber Bragg grating (FBG) design at the end, although it can detect obstacles (four), only It measures the different fiber-optic roads (4), can not simultaneously all the current status of the route, and the 継 赋 赋 雷 轮 轮 轮 _ 监 监 监 监 监 监 监 监 监 监 监 监 监 监 监 监 监 监 监 监 监 监 监 监 监 监 监 监 监 监 监 监 监Although this method can know that there is a certain divergent route of the obstacle, but it is impossible to know the location of the obstacle (4), there is still a limit on it. It can be seen that there are still many defects in the above-mentioned articles, which is not the designer of goodness. In order to improve the shortcomings derived from the above-mentioned conventional methods, the inventors of the present invention have improved and innovated after many years of painstaking research and research, and finally successfully developed and completed this optical divergence network fiber barrier monitoring device and method. SUMMARY OF THE INVENTION The object of the present invention is to provide an optical branch network optical fiber barrier monitoring device and method, and to deploy a fiber-to-the-home passive optical network service system. When there is a problem with the service system, in the general equipment room, the U-fiber path can be over-line or the optical loss value is too large, and the clear-cutting is the problem of the service system or the fiber routing, and the route and location of the obstacle are correctly and clearly displayed. Reducing the cost of maintenance and improving the maintenance efficiency. The optical divergence network optical fiber obstacle monitoring device and method capable of achieving the above object of the invention are the different monitoring wavelengths of the light-reducing secret anti-gamma Optical power, in order to achieve both the identification of obstacles and the route and obstacle location. The method is 200845611. Using the spectrum analyzer to monitor the different monitoring wavelengths and their optical power reflected by the optical network, the computer controls the measurement data. Analysis, determine the latest state of any divergent fiber routing, if the fiber breaks or deteriorates, immediately start high-density multi-wavelength optical time domain reflector, select the corresponding wavelength for obstacle position measurement for alarm and subsequent processing The basis of the process. [Embodiment] As shown in FIG. 1 , the optical branch network optical fiber obstacle monitoring device and the square of the present invention are shown. The schematic diagram of the architecture includes: a wide-band monitoring light source module (Light Source) 16 for continuously transmitting the light source of the monitoring band 17; an optical circulator 18 for connecting the broadband monitoring light source The light sent by the module 16 is sent to the optical network, and the monitoring light reflected by the optical network is sent to the spectrum analyzer 21; an optical channel selector (or optical channel selector) 15 is connected to the monitoring device and each Fiber-optic routing; (1 is a Wavelength Division Multiplexer 24 for integrating the service band Π with the optical signal of the monitoring band 17 and feeding it into the fiber μ; a specific wavelength optical filter 25, only in the light The specific monitoring wavelength optical signal of the service band 12 and the monitoring wavelength 17 passes; a monitoring band reflection component 26 allows the service band 12 optical signal in the light to pass through and reflects a specific monitoring wavelength in the light; an optical spectrum analyzer (Optical) Spectral Analyzer) 21, which measures different monitoring wavelengths and optical powers reflected back from the optical circulator 18 and the optical network; 200845611 a control computer 22, monitoring The process of extracting and analyzing the waveform diagram and the trace map of the comparative spectrum analyzer 21 and the high-density multi-wavelength optical time domain reflector 20 to obtain the latest status of the entire fiber divergence route, and executing various control commands. And a high-density multi-wavelength optical time domain reflector 20 for measuring different optical powers of different distances in the optical network at different wavelengths; the monitoring device is mainly located at the 10' optical line terminal of the equipment room (〇pticai Line Terminal, The OLT 11 sends the optical signal of the service band 12 to the split multiplex component 13, and the monitoring device sends the optical signal of the monitoring band 17 through the optical circulator 18 through the broadband monitoring light source module 16, and transmits it to the optical path selector 15 to The split-wave multiplexing component 13 and the split-wave multiplexing component 13 integrate the optical signals of the two bands of the service band 12 and the monitoring band 17 through the optical fiber 14, the optical cable 23 outside the machine room, and the optical splitter 24, and split the light into multiple The divergent fiber routing, when each of the divergent optical signals passes through the specific wavelength optical filter 25, filters out most of the wavelengths in the monitoring band, only by corresponding to the specificity of the different routing The wavelength is monitored and the optical signal of the service band is sent to the end of each route, and the optical signal to the end passes through the monitoring band reflection component 26; here, the optical signal of the service band 12 can pass through the monitoring band reflection component 26 to enter the optical network. The unit (0ptical Network Unit, ONU) 27 provides user service; and when the specific monitoring wavelength optical signal in the monitoring band 17 enters the monitoring band reflection element 26, the specific monitoring wavelength is reflected, wherein the monitoring band reflection element 26 in each of the different routes The specifications are the same, and the unique monitoring wavelengths can be reflected. The reflected monitoring wavelengths follow the original route, and enter the splitting multiplex component 13 through the specific wavelength optical filter 25, the optical splitter 24, the optical cable 23, and the optical fiber 14. The optical path selector 15 and the optical circulator 18 are received and measured by the spectrum analyzer 21 to obtain a reflection waveform of the entire divergent fiber routing end, as shown in FIG. 2, 8 200845611 The control computer 22 captures the waveform. Comparing the reflected waveforms 191 of different routes, the latest state information of the entire divergent fiber routing can be obtained; When a certain divergent route has an obstacle, the reflection waveform of the end of the entire divergent fiber routing will be as shown in FIG. 3, and the reflection waveform 192 of the obstruction route disappears, and the control computer 22 analyzes through the comparison, and it is known that the divergent route has an obstacle. The control computer 22 immediately enters the obstacle location measurement process. The obstacle position measurement process is performed by the high-density multi-wavelength optical time domain reflector 2 to emit a specific measurement wavelength 19 corresponding to the obstacle divergence route, and passes through the optical path selector 15, the split-wave multiplexing component U, the optical fiber 14, and the pro-23. , the optical splitter 24, the special long light ship 25, the last to the monitoring band reflection element 26, the high-density multi-wavelength cultivator 2G can make the latest trajectory map of the divergent route, and control (four) brain 22 The comparison analysis, as shown in _, can be used to know the location of the obstacle divergence route obstacle point (9) and serve as the basis for subsequent processes such as alarms. The invention can also be extended, such as the target _ series, with the lion lion handsome ch_l Selector 'OCS) 15 'In addition to the different processes can be input into the monitoring band and the specific measurement wavelength of the optical 谠 1 can be connected multiple The split-wave multiplexing component ls and the subsequent optical network and device can switch the different optical paths according to the monitoring process according to the monitoring process, and expand the number of passive optical networks to be monitored and the area to improve the use efficiency of the monitoring device and reduce the monitoring unit. cost. The invention is directed to a device and method for monitoring the status of an optical fiber in any position on a fiber-optic bifurcated route of a passive optical network. Compared with traditional light-sensing or tree-domain reflection (four) monitoring methods, the present invention can provide a more comprehensive and efficient monitoring method. The optical branch network optical fiber obstacle monitoring device and method provided by the invention have the following advantages when compared with the foregoing cited documents and other conventional technologies. 9 200845611 1. The invention can be equipped with a monitoring device at the machine room end. The specific wavelength optical filter and the monitoring band reflection component at the end of the route can avoid the mutual interference of the divergent route monitoring signals, improve the discrimination rate, and provide a feasible, reliable and high-efficiency passive optical network multi-divided fiber routing monitoring method. 2. The invention is easy to construct, and only needs to install the monitoring band reflection component of the unified specification at the user end, and is applicable to the fiber divergence routing of various lengths. 3. The present invention can simultaneously monitor and display the most miscellaneous conditions of multiple divergent paths on one or more passive optical networks, achieving a fast, large number of monitoring targets, and solving the problem of divergent routing obstacles ί. 4. The invention can perform single-ended and long-term automatic monitoring in the equipment room, quickly and correctly clarify the obstacles of the service system or the fiber routing, and the preventive maintenance can be performed by the latest state of the different routes, thereby providing better service quality. 5. Ben Maoming can reduce the personnel cost of network maintenance, and ensure the reliability and enthusiasm of passive optical network, thereby improving maintenance efficiency, and its economic benefits are very obvious. The above detailed description is for the specific description of the possible embodiments of the present invention, but the embodiment is not intended to be a full-time g of the present invention, and any equivalent implementation or modification of the present invention should include In the scope of the patent in this case. In summary, this case is not only innovative in terms of space type, but also can improve the above-mentioned effects of the above-mentioned items in comparison with the use of items. 'The statutory invention patents that should be fully in line with novelty and progress should be applied in accordance with the law. Approved this invention patent application, in order to invent invention, to the sense of virtue. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic structural view of an optical branching network optical fiber obstacle monitoring apparatus and method according to the present invention; FIG. 2 is a schematic diagram of an inverse 200845611 waveform of the optical spectrum monitoring device and method of the optical branching network. Figure 3 is a schematic diagram showing the disappearance of a certain branching route reflection waveform of the obstacle spectrum analyzer of the optical branching network fiber barrier monitoring device and method; and FIG. 4 is a high-density multi-wavelength of the optical branching network fiber barrier monitoring device and method The optical time domain reflector displays a comparison of the original and obstacle obstructions of a different route of the obstacle. [Main component symbol description] 10 equipment room 11 Optical line terminal (OLT) 12 service band 13 Wavelength Division Multiplexer (WDM) 14 fiber 15 Optical Channel Selector (OCS) 16 wide band Monitoring Light Source Module 17 Monitoring Band 18 Optical Circulator 19 Specific Measurement Wavelength 191 Different Routes of Reflected Waveforms 192 Obstacle Routes Reflected Waveforms Disappear 193 Barrier Points 22 Control Computer 23 Cables 24 Optical Splitter 25 The specific wavelength optical filter 26 monitors the band reflection element 27 Optical Network Unit (ONU) 11

Claims (1)

200845611 X. Patent application scope: 1. A light-dividing network optical fiber obstacle monitoring device, comprising: a broadband monitoring light source module, wherein the broadband monitoring light source module sends the optical signal of the monitoring band to the optical circulator; The circulator is configured to receive the optical signal of the monitoring band sent by the broadband monitoring light source module, and send it to the optical network to receive the optical signal of the monitoring band reflected by the optical network, and then send it to the spectrum analyzer; an optical path selector Receiving the optical signal of the monitoring band, then transmitting the multiplexed component, and switching the optical path according to the monitoring process; a multiplexed component for integrating the service band and the monitoring band into the optical fiber; Receiving the monitoring band in the optical fiber, and filtering out most of the monitoring band as the wavelength, only through the specific monitoring wavelength corresponding to the different routing, and the optical signal of the service band to the monitoring band reflection component at the end of each routing; Monitoring the band reflection component, receiving a specific monitoring wavelength sent by a specific wavelength optical filter' and reflecting the divergent paths A specific monitoring wavelength; an optical spectrum analyzer that receives and measures the wavelength and optical power of different monitoring wavelengths reflected by the optical circulator, and obtains a reflected waveform diagram; a control computer, system capture, analysis Reflecting the waveform map to find the obstacle route and performing the obstacle position measurement process; and a south density multi-wavelength optical time domain reflector, which emits a specific measurement wavelength corresponding to the obstacle divergence route, and provides a control computer analysis comparison, And obtain the location of the obstacle divergence route obstacle point. 2. The optical branch network optical fiber obstacle monitoring device according to claim 1, wherein the high 12 200845611 density multi-wavelength optical time domain reflector is controlled by a control computer when it is known that a divergent route has an obstacle The specific measurement wavelength corresponding to the different route of the obstacle is issued, and the latest trajectory map of the divergent route is measured to determine the obstacle location point of the divergent route. 3. The optical branch network optical fiber barrier monitoring device according to claim 1, wherein the control computer is connected to a broadband monitoring light source module, a spectrum analyzer, an optical path selector, and a high-density multi-wavelength optical time domain reflection. To monitor the entire process, and to extract, calculate, compare and divide the waveforms of the spectrum analyzer and the high-density multi-wavelength optical time domain reflector. The latest status information for the entire fiber divergence route. 4. The optical branch network optical fiber barrier monitoring device according to claim 1, wherein the special wavelength optical filter is installed at each front end of the optical splitter, except for the light. The service band optical signal passes, and the specific monitoring wavelength of the corresponding route is also passed, and other monitoring wavelengths are filtered out. 5. The optical branch network optical fiber barrier monitoring device according to claim 1, wherein the monitoring band reflection component is installed at the end of each of the different routes and has the same specifications, which can be The service band optical signal passes through and reflects a specific monitoring wavelength in the light. 6. The optical branch network optical fiber obstacle monitoring device according to claim 1, wherein the optical path selector includes: The monitoring process switches the optical path. In the normal state, the series optical circulator to the _band monitoring light source module continuously monitors the optical power of each of the different routes. When the obstacle occurs, it switches to the high-density multi-wavelength optical time domain reflector to perform the amount of the obstacle position. b; when applied to multiple passive optical networks, the optical path can be connected to multiple multiplexed components, and a set of monitoring devices can monitor multiple passive optical networks through 13 200845611. 7·- Passive The optical network fiber barrier monitoring method has the following steps: a. The optical line terminal sends the optical signal of the service band to the split multiplex component, and the monitoring device is provided by the broadband band. The monitoring light source module sends the optical signal of the monitoring band through the optical circulator, and then transmits the optical signal to the split-wave multiplexing component through the optical path selector, and the split-wave multiplexing component integrates the optical signal of the service band and the monitoring band into two bands, and then services The optical signals of the band and the monitoring band travel in the fiber to be tested, and then pass through the optical cable, the optical splitter, the specific wavelength optical filter, to the end of each branch route, and enter the monitoring band reflection component, and only the optical signal of the specific monitoring wavelength is reflected back. At the same time, the spectrum analyzer of the machine room receives and measures the optical signals of different monitoring wavelengths reflected by the different routes, and then obtains the waveform data of the latest state of each divergent route; c analyzes the reflected waveform data and borrows It is judged by comparing the waveform of the monitoring wavelength after each reflection in the waveform data with the optical power level; d judging the latest state of each of the divergent fiber routes, judging by the presence or absence of the reflected wavelength after reflection and the optical power level 'When the waveform of a particular monitoring wavelength corresponding to a divergent route disappears, the divergence road is indicated If an obstacle occurs, if the optical power is less than the preset threshold, it means that the bifurcation route is abnormal. If the optical power is close to the original value, the divergent route is normal; e. If the waveform of a divergent route is abnormal, the high is started. Density multi-wavelength optical time domain reflectors are used to measure the obstacle points to calibrate the divergent routes and obstacle locations where the obstacles occur, and to do appropriate treatment. 14 200845611 8-Light divergence network as described in claim 7 The method for monitoring the optical fiber barrier, wherein the position of each of the different fiber routing obstacle points is determined by comparing the original and the latest trajectory map obtained by the high-density multi-wavelength optical time domain reflector. The optical branch network optical fiber obstacle monitoring method according to Item 7 is characterized in that each routing front end of the optical splitter is provided with a specific wavelength optical filter and a routing end is provided with a monitoring band reflection component to filter the incoming light. In addition, reflection and transmission, it can avoid mutual interference of monitoring signals and improve the discrimination rate. „(10· The method for monitoring the optical fiber barrier of the optical divergence network described in claim 7 of the patent application, wherein the optical path selector is coupled to connect a plurality of split-wave multiplexing components and subsequent optical networks and devices, via The control computer switches the different optical paths according to the monitoring process to expand the number of passive optical networks to be monitored and the area to improve the use efficiency of the monitoring device and reduce the unit cost of monitoring. H. The optical divergence network described in claim 7 A fiber optic barrier monitoring method, wherein the step of measuring the obstacle position is: a high-density multi-wavelength optical time domain reflector emitting a specific amount corresponding to the obstacle bifurcation route (measuring wavelength, passing through the optical path selector, the splitting multiplex component , optical fiber, optical luminaire, optical splitter, specific wavelength optical filter, and finally to the monitoring band reflection component; b high-density multi-wavelength optical time domain reflector can measure the latest trajectory of the bifurcation route; c and control The computer comparison analysis can know the location of the obstacle divergence route obstacle point and serve as the basis for subsequent processes such as alarms.