CN103269247A - Intelligent optical marker, optical branching device and PON network monitoring system - Google Patents
Intelligent optical marker, optical branching device and PON network monitoring system Download PDFInfo
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- CN103269247A CN103269247A CN2013102163085A CN201310216308A CN103269247A CN 103269247 A CN103269247 A CN 103269247A CN 2013102163085 A CN2013102163085 A CN 2013102163085A CN 201310216308 A CN201310216308 A CN 201310216308A CN 103269247 A CN103269247 A CN 103269247A
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Abstract
The invention relates to the technical field of optics, and provides an intelligent optical marker, an optical branching device and a PON network monitoring system. The intelligent optical marker comprises a plurality of optical fiber cores, a fiber bragg grating is arranged on each optical fiber core, and only specific monitoring lights and specific communication service lights are allowed to pass through the fiber bragg grating of each optical fiber core. By means of the intelligent optical marker, the optical branching device and the PON network monitoring system, the state information of each branch in a PON network can be detected in real time.
Description
Technical field
The invention belongs to the communications field, relate in particular to a kind of intelligent optics concentrator marker, optical branching device and PON network monitoring system.
Background technology
Passive optical splitter (Splitter) is PON network (Passive Optical Network; Passive optical-fiber network) vital optical device in, PON network mid point is divided equally luminous power at down direction by passive optical splitter just to the passive optical network structure of multiple spot, at up direction luminous power is merged.Passive optical splitter has supported the structure of the point-to-multipoint of PON network.The ordinary passive optical branching device that existing PON network uses only be used for to the Communication ray signal effectively be coupled, branch, distribution, the passive optical splitter output does not have intelligent optical identification ability.Can only use the test light of a certain wavelength (the conventional 1625nm of use or 1650nm wavelength) to carry out the optical fiber link monitoring during monitoring of PON network link.Can't adopt different wavelength to identify different optical ports at every branch road of passive optical splitter output.If the fiber lengths that every branch road connects after the passive optical splitter is identical, which bar branch road is the fault that will cause optical fiber watch-dog (or system) can't identify optical fiber link in the PON network come from.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of intelligent optics concentrator marker, optical branching device and PON network monitoring system, is intended to solve existing P ON network can't be identified the guilty culprit branch road during each branch road behind the monitor optical splitter problem.
The embodiment of the invention is achieved in that a kind of intelligent optics concentrator marker, comprises the multifiber fibre core, and each fiber core is provided with fiber grating, and the fiber grating of described each fiber core only allows specifically to monitor light and communication service light passes through.
Further, the fiber grating of described each fiber core writes fiber core by ultraviolet molecular laser with the monitoring light of its correspondence and communication service light coherent field pattern and forms.
The present invention also proposes a kind of optical branching device, comprise the intelligent optics concentrator marker and the PLC chip that connect by optical fiber, described intelligent optics concentrator marker comprises the multifiber fibre core, each fiber core is provided with fiber grating, and the fiber grating of described each fiber core only allows specifically to monitor light and communication service light passes through.
Further, the fiber grating of described each fiber core writes fiber core by ultraviolet molecular laser with the monitoring light of its correspondence and communication service light coherent field pattern and forms.
The present invention also proposes a kind of PON network monitoring system, comprise optical line terminal, optical time domain reflectometer, optical branching device and a plurality of Optical Network Terminal, described optical line terminal, optical time domain reflectometer are connected with optical branching device respectively, and described a plurality of Optical Network Terminal connect the other end of described optical branching device respectively; Described optical branching device comprises intelligent optics concentrator marker and the PLC chip that connects by optical fiber, described intelligent optics concentrator marker comprises the multifiber fibre core, each fiber core is provided with fiber grating, and the fiber grating of described each fiber core only allows specifically to monitor light and communication service light passes through.
Further, the fiber grating of described each fiber core writes fiber core by ultraviolet molecular laser with the monitoring light of its correspondence and communication service light coherent field pattern and forms.
In embodiments of the present invention, use in the PON network monitoring with the optical branching device of intelligent optics concentrator marker, every optical fiber link branch road between optical branching device and the ONU is monitored by the monitoring light of different wave length.During monitoring, OTDR(Optical Time Domain Reflectometer, optical time domain reflectometer) the monitoring light that sends out different wave length by program control enters optical branching device, behind intelligent optics concentrator marker, enter into each Optical Network Terminal, OTDR detects the information of each the branch road different wave length after the optical branching device and obtains the curvilinear figure of each wavelength, and then recognizes each tributary port information and each branch circuit link real-time status.Therefore the optical branching device of the embodiment of the invention can be grasped the branch road state information between optical branching device and each ONU in real time.And the optical branching device with intelligent optics concentrator marker is all installed than being easier in New-deployed Network and existing network transformation, and the optical branching device that only needs to install or replace the intelligent optics sign of this newly-designed band in optical distribution network (ODN) structure gets final product, and is convenient and easy.
Description of drawings
Fig. 1 is the schematic diagram of the fiber grating that provides of the embodiment of the invention;
Fig. 2 is the structure chart of the device of the making intelligence optics concentrator marker that provides of the embodiment of the invention;
Fig. 3 is the structure chart of the optical branching device that provides of the embodiment of the invention;
Fig. 4 is another structural representation of the optical branching device that provides of the embodiment of the invention;
Fig. 5 is the structure chart of the PON network monitoring system that provides of the embodiment of the invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the present invention, and be not used in restriction the present invention.
The optical branching device of the embodiment of the invention utilizes fiber grating to finish.Fiber grating is the light sensitivity of utilizing optical fiber core material, adopt the method for mask exposure that incident light coherent field pattern is write fibre core by UV excimer laser, make fibre core along the axial refractive index of fibre core permanent change take place, the change of refractive index is periodic distribution, forms the Bragg optical grating construction.As shown in Figure 1, Figure 1 shows that the operation principle of fiber grating, the original refractive index of fiber core is n2, and the refractive index of the part of being crossed by UV-irradiation becomes n2 ', and the distribution cycle d of refractive index is exactly the pitch of fiber grating; When broadband light was passed through fiber grating, the incident light that satisfies the wavelength of Bragg condition passed through grating, and the incident light of its commplementary wave length is filtered.Its effect comes down to form (transmission or reflection) filter or speculum of an arrowband in fibre core.When beamwidth spectral light process fiber grating, the wavelength that satisfies the fiber grating Bragg condition will continue transmission, and remaining wavelength will be filtered.
Figure 2 shows that the producing device of the fiber grating of the embodiment of the invention.In interference system, mirror M 3 and M4 are program control adjustable, make that the angle of two beam interferometer light beams is adjustable continuously, thereby can write the different a series of fiber gratings of reflection wavelength at the different optical fiber of a Gent on-line automaticly.Described special fiber is the higher optical fiber of reflectivity, is 1.5 optical fiber as reflectivity.
High reflectance optical fiber with one section 30cm, 8 fibre cores is example, comprise that as this optical fiber fibre core 1 is to fibre core 8, fibre core 1 to fibre core 8 is carved with corresponding fiber grating respectively, fibre core 1 to the monitoring optical wavelength of fibre core 8 correspondences is respectively the fibre core grating of 1525nm, 1526nm, 1530nm, 1535nm, 1545nm, 1555nm, 1560nm, 1565nm, and normal communication service light is generally 1310nm, 1490nm, 1550nm.Then fibre core 1 only is monitoring light and the communication service light of 1525nm by wavelength, fibre core 8 only is light and the communication service light of 1565nm by wavelength, we deserve to be called and state photoetching good multifiber fibre core is called intelligent optics concentrator marker, in the practical application, the quantity of the fiber core of intelligent optics concentrator marker can be set as required, be not limited only to the example of the embodiment of the invention.
Fig. 3, Figure 4 shows that the structure chart of the optical branching device of the embodiment of the invention.The optical branching device of the embodiment of the invention comprises fused fiber splice point, intelligent optics concentrator marker and optical branching device (PLC) chip that connects successively.One end of intelligent optics concentrator marker is directly put into the V groove of PLC chip, fix then, encapsulation is advanced in the PLC chip, and the output optical fiber of the other end and optical branching device carries out thermal welding, adopts the heat-shrinkable T bush fixed position to protect the welding point.At last PLC chip, intelligent optical identifier, optical fiber heat-shrinkable T bush all are fixed in the box of optical branching device, form a kind of optical branching device for PON network monitoring band intelligence optical identification.Its manufacture method is specific as follows:
As shown in Figure 3, the optical branching device of the embodiment of the invention is made up of bottom (scheming not shown), fused fiber splice point 02, PLC chip 03, specialty optical fiber 04, intelligent optics concentrator marker 05 and loam cake (scheming not shown).Design optical fiber fiber winding disk in bottom, a lateral layout has a PLC chip draw-in groove to place PLC chip 03 in bottom, and the another side design has an intelligent optics concentrator marker draw-in groove to place intelligent optics concentrator marker 05.Bottom is provided with optical fiber input port and delivery outlet.The optical fiber of optical branching device input port is connected with PLC chip 03; the output optical fibre of PLC chip 03 is connected with intelligent optics concentrator marker 05; the optical fiber of the output optical fibre of intelligence optics concentrator marker 05 and the delivery outlet of optical branching device carries out fixing with the fused fiber splice sleeve pipe after the welding, reaches the effect of protection optical fiber with it.Loam cake and bottom are covered, in order to all of whole optical branching device inside are protected around fine and packaging.
With reference to figure 5, Figure 5 shows that the PON network structure of the optical branching device that uses the embodiment of the invention.Comprise OLT(Optical Line Terminal, optical line terminal), OTDR, optical branching device 6 and a plurality of ONU(Optical Network Unit, Optical Network Terminal) (ONU17, ONU28, ONU39 ... ONU3111, ONU3212).Comprise that with intelligent optics concentrator marker 5 fiber cores are example, corresponding wavelength is the monitoring light of R1, R2, R3, R4 and R5 respectively, and namely the fiber core of corresponding ONU17 is monitoring light and the communication service light of R1 by wavelength, and other light is filtered; The fiber core of corresponding ONU28 is monitoring light and the communication service light of R2 by wavelength, and other light is filtered; The fiber core of corresponding ONU39 is monitoring light and the communication service light of R3 by wavelength, and other light is filtered; The fiber core of corresponding ONU3111 is monitoring light and the communication service light of R4 by wavelength, and other light is filtered; The fiber core of corresponding ONU3212 is monitoring light and the communication service light of R5 by wavelength, and other light is filtered.5 fiber cores are connected respectively to ONU17, ONU28, ONU39, ONU3111, ONU3212.
Under PON network normal operation, OTDR emission light pulse is in optical branching device 6, and 5 fiber cores of the intelligent optics concentrator marker in the optical branching device 6 by corresponding monitoring light and communication service light, filter out other light respectively.OTDR can get access to the reverberation curve of the different wave length of every fiber core reflected back, recognizes different Optical Network Terminal by the calibration curve information of different wave length, and the optical fiber link state information between optical branching device and each Optical Network Terminal.For example: when OTDR sends light pulse to optical branching device 6, the monitoring light curve that has comprised the ONU2 correspondence in the reverberation curve that obtains as OTDR, prove that then OTDR can identify the optical fiber link between optical branching device 6 and the ONU2, can further analyze the essential information situation of this optical fiber link by the curvilinear figure that obtains this wavelength.
In the embodiment of the invention, use in the PON network monitoring with the optical branching device of intelligent optics concentrator marker, because optical branching device uses different monitoring light with every branch road between the ONU.When the branch road of monitoring between optical branching device and each ONU, the curvilinear figure that OTDR receives corresponding wavelength will demonstrate the state information of the corresponding branch road of this wavelength, can determine key property (fiber lengths, fibre loss, breakpoints of optical fiber position etc.) in the tested optical fiber link according to this curve.And traditional PON supervisory control system, after OTDR scanning is finished, every branch road uses same wavelength (1625nm or 1650nm, mainly be to avoid professional light) monitoring light, the curve of all PLC optical branching device branch roads all is superimposed upon together, is difficult for telling the optical fiber link fault from the state information of which bar branch road and each branch road.Therefore the optical branching device of the embodiment of the invention can be grasped the branch road state information between optical branching device and each ONU in real time.And the optical branching device with intelligent optics concentrator marker is all installed than being easier in New-deployed Network and existing network transformation, and the optical branching device that only needs to install or replace the intelligent optics sign of this newly-designed band in optical distribution network (ODN) structure gets final product, and is convenient and easy.
The above only is preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. an intelligent optics concentrator marker comprises the multifiber fibre core, it is characterized in that each fiber core is provided with fiber grating, and the fiber grating of described each fiber core only allows specifically to monitor light and communication service light passes through.
2. intelligent optics concentrator marker as claimed in claim 1 is characterized in that, the fiber grating of described each fiber core writes fiber core by ultraviolet molecular laser with the monitoring light of its correspondence and communication service light coherent field pattern and forms.
3. optical branching device, comprise the intelligent optics concentrator marker and the PLC chip that connect by optical fiber, described intelligent optics concentrator marker comprises the multifiber fibre core, it is characterized in that, each fiber core is provided with fiber grating, and the fiber grating of described each fiber core only allows specifically to monitor light and communication service light passes through.
4. optical branching device as claimed in claim 3 is characterized in that, the fiber grating of described each fiber core writes fiber core by ultraviolet molecular laser with the monitoring light of its correspondence and communication service light coherent field pattern and forms.
5. PON network monitoring system, comprise optical line terminal, optical time domain reflectometer, optical branching device and a plurality of Optical Network Terminal, described optical line terminal, optical time domain reflectometer are connected with optical branching device respectively, and described a plurality of Optical Network Terminal connect the other end of described optical branching device respectively; It is characterized in that described optical branching device is claim 3 or 4 described optical branching devices.
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| CN103795460A (en) * | 2014-01-06 | 2014-05-14 | 孙麦可 | Optical fiber network supervisory system |
| CN108809411A (en) * | 2018-09-27 | 2018-11-13 | 国网河南省电力公司洛阳供电公司 | A kind of double light source emitting structurals of optical time domain transmitter |
| CN109660294A (en) * | 2019-02-28 | 2019-04-19 | 北京泛在云科技有限公司 | A kind of optical-fiber intelligent matching system, method and device |
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Application publication date: 20130828 |