CN101079668A - Device, method and device for positioning the optical fiber failure - Google Patents
Device, method and device for positioning the optical fiber failure Download PDFInfo
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- CN101079668A CN101079668A CNA2007101184290A CN200710118429A CN101079668A CN 101079668 A CN101079668 A CN 101079668A CN A2007101184290 A CNA2007101184290 A CN A2007101184290A CN 200710118429 A CN200710118429 A CN 200710118429A CN 101079668 A CN101079668 A CN 101079668A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0221—Power control, e.g. to keep the total optical power constant
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- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
- G01M11/31—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter and a light receiver being disposed at the same side of a fibre or waveguide end-face, e.g. reflectometers
- G01M11/3109—Reflectometers detecting the back-scattered light in the time-domain, e.g. OTDR
- G01M11/3127—Reflectometers detecting the back-scattered light in the time-domain, e.g. OTDR using multiple or wavelength variable input source
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
- G01M11/31—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter and a light receiver being disposed at the same side of a fibre or waveguide end-face, e.g. reflectometers
- G01M11/3109—Reflectometers detecting the back-scattered light in the time-domain, e.g. OTDR
- G01M11/3136—Reflectometers detecting the back-scattered light in the time-domain, e.g. OTDR for testing of multiple fibers
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- 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
- H04B10/071—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using a reflected signal, e.g. using optical time domain reflectometers [OTDR]
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- 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
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2581—Multimode transmission
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Abstract
The invention discloses a fiber fault location equipment, method and device in the optical receiving network field. The optical time-domain echo wave length selecting module of the equipment comprises the following parts: an optical switch and an array waveguide raster. The method comprises the following steps: detecting the fault of the turn-up channel by the fiber fault location equipment; informing the optical line ending equipment corresponding with the upgoing channel to break the sending of the downgoing data; producing the line diagnostic signal; proceeding with the downgoing sending of the light source modulating the optical line ending equipment; receiving selectively and analyzing the reflected line diagnostic signal by the fiber fault location equipment; reporting the concrete position of the fiber fault to the network administrator according to the analyzed result. The device comprises the following parts: a control module, a modulating module, a sending module and a fiber fault position module. The invention reduces the cost of the fiber fault position system.
Description
Technical field
The present invention relates to the Optical Access Network field, particularly a kind of fiber fault location equipment, method and device.
Background technology
Recent continuing to bring out along with various data services, demand to wideband switch-in business increases sharply, in order to satisfy these high bandwidths, EPON (APON-ATM Passive OpticalNetwork) based on ATM has appearred in the demand that big capacity inserts, broadband passive optical network (BPON-Broadband Passive Optical Network), EPON (EPON-Ethernet Passive Optical Network) and gigabit passive optical network TDMA-PON such as (GPON-GigabitPassive Optical Network) (Time Division Multiple Access-Passive Optical Network time division multiple access inserts EPON) network based on Ethernet.But because the increase that user bandwidth requires, and the TDMA-PON network is because the restriction that is subjected to burst technique and has only a transmission wavelength, make it be difficult to realize the expansion of bandwidth and transmission capacity, improving bandwidth will increase the number of the optical wavelength of user data transmission, Wave division multiplexing passive optical network (WDM-PON-Wavelength Division Multiplexing-Passive Optical Network) based on the multi-wavelength transmission is considered to the ultimate solution that bandwidth improves at present, as shown in Figure 1.In process to the operation maintenance of WDM-PON system, optical-fiber line fault detects and fault location is absolutely necessary, generally all using optical time domain reflectometer (OTDR-OpticalTime Domain Reflectometer) to carry out optical-fiber line fault at present in the GPON/EPON system detects and fault location: use the LASER Light Source of OTDR tester to send a light pulse to tested optical fiber at CO (Central Office-central office) end, light pulse (comprises connector at optical fiber itself and each characteristic point, disconnected fine point, overbending fiber segment etc.) have light signal reflected back OTDR on, the light signal of reflected back is again by the receiver of directional couple to OTDR, and convert the signal of telecommunication here to, finally on display screen, demonstrate OTDR test curve figure, can detect the particular location of fiber failure point and this fault point according to OTDR test curve figure.The WDM-PON system is different with TDMA-PON systems such as APON, BPON, GPON and EPON, it has used lambda router (for example array waveguide grating) at distant-end node, therefore can only transmit the light signal of the channel wavelength of corresponding wavelength router on each road feeder line section optical fiber, this just makes the OTDR sensed light signal want to arrive feeder line section optical fiber to carry out fault detect and fault location, just must provide a plurality of OTDR to detect wavelength.
In the prior art, two kinds of fiber failure localization methods are provided at single fiber bi-directional and two fine two-way WDM-PON system.WDM-PON system for single fiber bi-directional, adopt a kind of checkout equipment of external to carry out the fiber failure location, as shown in Figure 2, it detects principle: use control circuit control tunable optical filter to filter out OTDR wavelength (the AWG channel wavelength that this OTDR wavelength is corresponding corresponding with feeder line section optical fiber to be detected) from wide spectrum light source, then the OTDR light signal is injected FP-LD (Fabry-Perot Laser Diodes-Fabry-Perot laser) and amplify, pass through again in tunable optical filter, circulator 3 ports and the CWDM filter incoming feeder section optical fiber; OTDR reverberation light signal enters optical-electrical converter by CWDM filter and circulator 4 ports once more and receives, and after various corresponding amplifications and signal processing, finally obtains OTDR test curve figure on display; In the technique scheme OTDR part is made an equipment separately, and when the WDM-PON system deployment, just at first the CWDM filter is installed in advance in OLT (Optical Line Terminal-optical link termination equipment) side, when needs carry out the fiber failure location, only need that this OTDR testing equipment is inserted the CWDM filter and just can operate.For the two-way WDM-PON system of two fibres, fiber fault location equipment is directly embedded among the OLT, as shown in Figure 3, and utilize the OLT conventional lighting sources as the OTDR light source, when needs detect certain road optical-fibre channel fault, the corresponding OLT light source of control unit control sends the OTDR light pulse, because the backward scattered influence of Rayleigh, the light signal that is being mingled with other optical wavelength in the OTDR light pulse of returning by circulator, filter the OTDR light pulse to the monitoring receiver by control unit control tunable optical filter, obtain OTDR test curve figure by amplification and signal processing again, thereby carry out the fiber failure location.But, traditional OTDR method of measurement is when carrying out the fiber failure location, need to adjust centre wavelength that tunable optical filter makes OTDR dynamically with AWG (the Array Waveguide Grating-array waveguide grating) wavelength alignment at system under test (SUT) remote node place, and this alignment function difficulty is very big, the price comparison height of tunable optical filter will certainly cause the application cost of fiber failure navigation system too high simultaneously.
Summary of the invention
For the input cost that makes the fiber failure navigation system reduces, and the operability that improves the fiber failure navigation system, the embodiment of the invention provides a kind of fiber fault location equipment, method and device.
The embodiment of the invention provides a kind of fiber fault location equipment, described equipment comprises that light source, pulse generator, control circuit, output light signal amplify modulation module, circulator and reflected light signal receiver module, described equipment also comprises optical time domain reflection wavelength selection module, described optical time domain reflection wavelength selects module to be combined by optical switch and array waveguide grating, described optical switch connects the optical channel output optical time domain reflection light signal of one tunnel described array waveguide grating under the control of described control circuit.
The embodiment of the invention provides a kind of fiber failure localization method, and described method comprises:
Fiber fault location equipment detects uplink and breaks down, and notifies the optical link termination equipment corresponding with described uplink to cut off the transmission of downlink data;
Described fiber fault location equipment produces the line diagnosis signal, and described line diagnosis signal is sent to described optical link termination equipment;
Described optical link termination equipment amplifies described line diagnosis signal, and sends described line diagnosis signal;
Described fiber fault location equipment receives the light signal that reflects, and selects described line diagnosis signal from described light signal, and according to the analysis processing result to described line diagnosis signal, the particular location that reports optical fiber to break down to NM server.
The embodiment of the invention provides a kind of fiber failure positioner, and this device comprises control module, modulation module, sending module and fiber failure locating module;
Whether described control module is used to detect uplink and breaks down, and when detecting described uplink and break down, sends notice to described modulation module and sending module;
Described modulation module produces the line diagnosis signal, and described line diagnosis signal is sent to described sending module after being used to receive the notice of described control module transmission;
Described sending module is used to receive the line diagnosis signal of described modulation module transmission and the notice that control module sends, and after receiving the notice that described control module sends, cut off the transmission of downlink data, the described line diagnosis signal of receiving is modulated on the optical link termination equipment carries out descending transmission;
Described fiber failure locating module is used to receive the line diagnosis signal that reflects on the fibre circuit, and according to the analysis processing result to described line diagnosis signal, the particular location that reports optical fiber to break down to NM server.
The beneficial effect of the technical scheme that the embodiment of the invention provides is: by using the fiber fault location equipment that is combined by optical switch and array waveguide grating, reduced the input cost of fiber failure navigation system effectively; In addition, the array waveguide grating of array waveguide grating in the fiber fault location equipment and system under test (SUT) central office side is chosen for the same model device, and the centre wavelength of the two is alignd and is fixing, has reduced the operation easier of fiber fault location equipment so widely.
Description of drawings
Fig. 1 is a WDM-PON system group network schematic diagram in the prior art;
Fig. 2 uses the external fiber fault location equipment that single fiber bidirectional WDM-PON system is carried out fiber failure Positioning Principle schematic diagram in the prior art;
Fig. 3 uses built-in fiber fault location equipment that two fine bidirectional WDMs-PON system is carried out fiber failure Positioning Principle schematic diagram in the prior art;
Fig. 4 is the structure principle chart of the fiber fault location equipment that provides of the embodiment of the invention;
Fig. 5 is first kind of single fiber bidirectional WDM-PON system fiber failure positioning principle schematic diagram that the embodiment of the invention provides;
Fig. 6 is the method flow diagram that first kind of single fiber bidirectional WDM-PON system fiber failure is located that the embodiment of the invention provides;
Fig. 7 is first kind of two fine bidirectional WDM-PON system fiber failure positioning principle schematic diagram that the embodiment of the invention provides;
Fig. 8 is second kind of single fiber bidirectional WDM-PON system fiber failure positioning principle schematic diagram that the embodiment of the invention provides;
Fig. 9 is the method flow diagram that second kind of single fiber bidirectional WDM-PON system fiber failure is located that the embodiment of the invention provides;
Figure 10 is second kind of two fine bidirectional WDM-PON system fiber failure positioning principle schematic diagram that the embodiment of the invention provides;
Figure 11 is the structure chart of the fiber failure positioner that provides of the embodiment of the invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, embodiment of the present invention is described further in detail below in conjunction with accompanying drawing.
As shown in Figure 4, the embodiment of the invention provides a kind of fiber fault location equipment, it comprises light source, pulse generator, control circuit, the OTDR wavelength is selected module, the output light signal amplifies modulation module, circulator and reflected light signal receiver module: the OTDR wavelength selects module to be combined by optical switch and the AWG of 1 * N, in order to substitute tunable optical filter of the prior art, use the optical switch of 1 * N and the combination of AWG that a plurality of OTDR wavelength are provided, wavelength selection according to AWG, the N of an AWG passage will be exported N wavelength optical signals, control circuit control 1 * N optical switch connects the output of one road AWG optical channel as the OTDR light signal, and the fiber fault location equipment that provides of the embodiment of the invention can provide N OTDR wavelength thus; The output light signal amplifies modulation module and uses IL-FP LD (injection locking fabry-Perot type laser) or RSOA (reflective semiconductor optical amplifier) to realize; The reflected light signal receiver module is made up of optical-electrical converter, light signal amplification circuit, A/D converter, signal processor and display; Light source can use wide spectrum light source.The operation principle of the fiber fault location equipment that the embodiment of the invention provides is: after wide spectrum light source output light signal outputs to the public port of AWG by circulator, control circuit control optical switch is selected definite OTDR wavelength, the OTDR light wave is injected into amplifies with OTDR data-modulated among IL-FP LD or the RSOA, output in the system under test (SUT) by circulator again, the OTDR light signal that reflects enters optical-electrical converter by circulator and receives, after light signal amplification and A/D conversion process, finally on display, demonstrate OTDR test curve figure, judge that according to OTDR test curve figure abort situation safeguards.For example: the first via user of WDM-PON system breaks down, the fiber fault location equipment that the embodiment of the invention is provided is connected to the CWDM filter of disposing in advance in the WDM-PON system, start this equipment then, connect AWG output first via passage by control circuit control 1 * N optical switch, observe OTDR test curve figure afterwards, figure judges the particular location that fibre circuit breaks down according to the OTDR test curve, and in time carries out attended operation.
The OTDR wavelength is selected the product that the AWG of module can select the AWG with system under test (SUT) remote node place to have same model in the fiber fault location equipment that present embodiment provides, the two centre wavelength alignment and fixing, connect corresponding AWG passage by control 1 * N optical switch during wavelength alignment and just can produce corresponding OTDR wavelength light signal automatically, the centre wavelength that has solved OTDR is aimed at the problem of difficult operation with the AWG channel center at system under test (SUT) remote node place; Simultaneously, AWG is relative with the combination of 1 * N optical switch, and the tunable optical filter cost is lower, has reduced the input cost of fiber failure navigation system effectively.
In all schemes of WDM-PON system, using two wide spectrum light sources to carry out spectrum cuts apart seed light source is provided, the CO end uses IL-FP LD or RSOA to send downlink data, the WDM-PON system that ONT (Optical Network Terminal-Optical Network Terminal) end uses IL-FP LD or RSOA to send upstream data is the WDM-PON system schema that is commonly used at present, this WDM-PON system comprises single fiber bidirectional WDM-PON system and two fine bidirectional WDMs-PON system, the embodiment of the invention is an example with single fiber bidirectional WDM-PON system of cutting apart based on the wide spectrum light source spectrum, sets forth the fiber failure localization method that the embodiment of the invention provides.
Method 1:
Referring to Fig. 5, for the WDM-PON system of cutting apart based on the wide spectrum light source spectrum, this method is built into fiber fault location equipment among the OLT, utilize the following line light source transmitting line diagnostic signal of OLT, OTDR signal for example, use tunable optical filter to filter and also receive the OTDR reflected signal, the OTDR reflected signal is analyzed and handled, and then the particular location that breaks down of definite optical fiber.Fiber fault location equipment comprises control unit, OTDR pulse generator, OTDR receiver and tunable optical filter: control unit is used to detect upstream data transmission quality, control OTDR pulse generator, control electric switch modulation OTDR signal, control tunable optical filter filtration OTDR reflected signal, and analyze and handle the OTDR reflected signal that the OTDR receiver is received, judge the particular location that optical fiber breaks down; Tunable optical filter is used for the OTDR reflected signal is filtered.Electric switch is used to finish the modulation switching of OTDR signal and normal downstream signal.
Adopt technique scheme to realize that the method for WDM-PON system fiber failure location specifically may further comprise the steps, referring to Fig. 5 and Fig. 6:
Step 101: control unit detects a certain uplink and breaks down, the transmission that transmitting control commands notifies this path electric switch to cut off downlink data, and control OTDR pulse generator modulation OLT light source sends the OTDR signal;
Control unit is monitored the signal error rate and the received optical power of each bar uplink of WDM-PON system in real time, if finding the signal error rate generation deterioration and/or the received optical power of a certain uplink undergos mutation, then control unit thinks that this uplink breaks down, transmitting control commands is notified the transmission of this path electric switch cut-out downlink data, and sends alarm signal to webmaster; After this path electric switch is received control command, the OLT light source is switched to the OTDR modulation condition;
Control unit is to OTDR pulse generator transmitting control commands, and control OTDR pulse generator modulation OLT light source sends the OTDR signal; In the pulse that the OTDR pulse generator sends, need to add the instruction that the ONT light source is closed, can prevent that like this ONT uplink optical signal from disturbing the OTDR signal;
After amplifying, step 102:OTDR signal process IL-FP LD or RSOA be sent to AWG1;
Wide spectrum light source 1 and wide spectrum light source 2 spectrums divide the light signal that sends by after the AWG1 demultiplexing, produce wavelength and are respectively λ
1, λ
2..., λ
nLight signal, and be sent to IL-FP LD or RSOA; IL-FP LD or RSOA are sent to AWG1 after the light signal received and OTDR signal are amplified;
Step 103:AWG1 is sent to the ONT end with OTDR signal and the light signal of receiving by circulator;
Step 104: the OTDR signal and the light signal that reflect are sent to tunable optical filter by circulator, and tunable optical filter is sent to the OTDR receiver with the OTDR signal;
Tunable optical filter is adjusted himself parameter under the control of control unit, make the OTDR signal can pass through the tunable optical filter transmitting optical signal;
Step 105:OTDR receiver is sent to control unit with the OTDR signal of receiving;
Step 106: control unit is analyzed and is handled the OTDR signal of receiving, and the fault location result is reported NM server;
Control unit is through analysis and processing to the OTDR signal, can draw OTDR test curve figure, can orient the particular location that optical fiber breaks down more accurately according to OTDR test curve figure, and the fiber failure positioning result is reported NM server, so that safeguard in time.
In actual applications, identical for the fiber failure localization method and the present embodiment of two fine bidirectional WDM-PON system (as shown in Figure 7) of cutting apart based on the wide spectrum light source spectrum, repeat no more here.
Present embodiment uses IL-FP LD or the RSOA light source as WDM-PON system fiber fault location equipment by fiber fault location equipment is built among the OLT, thereby has reduced the input cost of fiber failure navigation system in the WDM-PON system effectively.
Method 2:
Referring to Fig. 8, for the WDM-PON system of cutting apart based on the wide spectrum light source spectrum, this method is built into fiber fault location equipment among the OLT, utilize the following line light source transmitting line diagnostic signal of OLT, OTDR signal for example, use AWG (being the same model device) and the combination of 1 * N optical switch is filtered and reception OTDR reflected signal, the OTDR reflected signal is analyzed and handled with the AWG of CO end, and then the particular location that breaks down of definite optical fiber.Fiber fault location equipment comprises that control unit, OTDR pulse generator, OTDR receiver and AWG and 1 * N optical switch make up: control unit is used to detect upstream data and sends quality, controls the OTDR pulse generator, controls electric switch modulation OTDR signal, controls AWG and 1 * N optical switch combination filtration OTDR reflected signal, and analyze and handle the OTDR reflected signal that the OTDR receiver is received, judge the particular location that optical fiber breaks down; AWG and the combination of 1 * N optical switch are used for the OTDR reflected signal is filtered.Electric switch is used to finish the modulation switching of OTDR signal and normal downstream signal.
Adopt technique scheme to realize that the method for WDM-PON system fiber failure location specifically may further comprise the steps, referring to Fig. 8 and Fig. 9:
Step 201: control unit detects a certain uplink and breaks down, the transmission that transmitting control commands notifies this path electric switch to cut off downlink data, and control OTDR pulse generator modulation OLT light source sends the OTDR signal;
Control unit is monitored the signal error rate and the received optical power of each bar uplink of WDM-PON system in real time, if finding the signal error rate generation deterioration and/or the received optical power of a certain uplink undergos mutation, then control unit thinks that this uplink breaks down, transmitting control commands is notified the transmission of this path electric switch cut-out downlink data, and sends alarm signal to webmaster; After this path electric switch is received control command, the OLT light source is switched to the OTDR modulation condition;
Control unit is to OTDR pulse generator transmitting control commands, and control OTDR pulse generator modulation OLT light source sends the OTDR signal; In the pulse that the OTDR pulse generator sends, need to add the instruction that the ONT light source is closed, can prevent that like this ONT uplink optical signal from disturbing the OTDR signal;
After amplifying, step 202:OTDR signal process IL-FP LD or RSOA be sent to AWG1;
Wide spectrum light source 1 and wide spectrum light source 2 spectrums divide the light signal that sends by after the AWG1 demultiplexing, produce wavelength and are respectively λ
1, λ
2..., λ
nLight signal, and be sent to IL-FP LD or RSOA; IL-FP LD or RSOA are sent to AWG1 after the light signal received and OTDR signal are amplified;
Step 203:AWG1 is sent to the ONT end with OTDR signal and the light signal of receiving by circulator;
Step 204: OTDR signal that reflects and light signal are sent to AWG2 and the combination of 1 * N optical switch by circulator, and AWG2 and the combination of 1 * N optical switch are sent to the OTDR receiver with the OTDR signal;
1 * N optical switch connects the AWG2 passage of corresponding OTDR signal under the control of control unit, make the OTDR signal can be by AWG2 and 1 * N optical switch transmitting optical signal; AWG2 and with the AWG1 of CO end be the same model device;
Step 205:OTDR receiver is sent to control unit with the OTDR signal of receiving;
Step 206: control unit is analyzed and is handled the OTDR signal of receiving, and the fault location result is reported NM server;
Control unit is through analysis and processing to the OTDR signal, can draw OTDR test curve figure, can orient the particular location that optical fiber breaks down more accurately according to OTDR test curve figure, and the fiber failure positioning result is reported NM server, so that safeguard in time.
In actual applications, identical for the fiber failure localization method and the present embodiment of two fine bidirectional WDM-PON system (as shown in figure 10) of cutting apart based on the wide spectrum light source spectrum, repeat no more here.
Present embodiment is by being built into fiber fault location equipment among the OLT, use IL-FP LD or RSOA light source as WDM-PON system fiber fault location equipment, and use AWG and 1 * N optical switch to make up to substitute tunable optical filter, thereby reduced the input cost of fiber failure navigation system in the WDM-PON system widely; Simultaneously since in the AWG of fiber fault location equipment and the tested WDM-PON system AWG of CO end be the same model device, make the two the centre wavelength alignment and fix, implement than being easier to.
Referring to Figure 11, the embodiment of the invention provides a kind of fiber failure positioner, and this device comprises control module, modulation module, sending module and fiber failure locating module;
Whether control module is used to detect uplink and breaks down, and when detecting uplink and break down, sends notice to modulation module and sending module;
Modulation module produces the line diagnosis signal after being used to receive the notice of control module transmission, and the line diagnosis signal is sent to sending module;
Sending module is used to receive the line diagnosis signal of modulation module transmission and the notice that control module sends, and after receiving the notice that control module sends, cut off the transmission of downlink data, the line diagnosis signal of receiving is modulated on the optical link termination equipment carries out descending transmission;
The fiber failure locating module is used to receive the line diagnosis signal that reflects on the fibre circuit, and according to the analysis processing result to the line diagnosis signal, the particular location that reports optical fiber to break down to NM server.
Control module comprises signal error rate detecting unit, received optical power detecting unit and notice transmitting element;
Whether the signal error rate that the signal error rate detecting unit is used to detect uplink deterioration takes place, and testing result is sent to the notice transmitting element;
Whether the received optical power detecting unit is used to detect the received optical power of uplink undergos mutation, and testing result is sent to the notice transmitting element;
The notice transmitting element is used to receive signal error rate generation deterioration or/and after the testing result that received optical power is undergone mutation, send notice to modulation module and sending module.
Sending module comprises notice receiving element, amplifying unit and transmitting element;
The notice receiving element is used for the notice that the reception notification transmitting element sends, and the notice that will receive sends to transmitting element;
Amplifying unit is used to receive the line diagnosis signal that modulation module sends, and the line diagnosis signal is amplified, and the line diagnosis signal after amplifying is sent to transmitting element;
Transmitting element cuts off the transmission of downlink data after being used to receive the notice that the notice receiving element sends, and the line diagnosis signal of receiving is modulated on the optical link termination equipment carries out descending transmission.
Amplifying unit is specially injection locking fabry-Perot type laser or reflective semiconductor optical amplifier.
The fiber failure locating module comprises analysis and processing unit and reports the unit;
Analysis and processing unit is used to receive the line diagnosis signal that reflects on the fibre circuit, and the line diagnosis signal is carried out analyzing and processing, obtains the more specific location information that optical fiber breaks down, and information sent to reports the unit;
Report the unit to be used for the information that the receiving and analyzing processing unit sends, and information is reported NM server.Present embodiment amplifies and the transmitting line diagnostic signal by using injection locking fabry-Perot type laser or reflective semiconductor optical amplifier, has reduced the input cost of fiber failure navigation system effectively.
The technical scheme that the embodiment of the invention provided is by being built into fiber fault location equipment among the OLT, use IL-FP LD or RSOA light source as WDM-PON system fiber fault location equipment, and use AWG and 1 * N optical switch to make up to substitute tunable optical filter, reduced the input cost of fiber failure navigation system in the WDM-PON system effectively; Simultaneously since in the AWG of fiber fault location equipment and the tested WDM-PON system AWG of CO end be the same model device, make the two the centre wavelength alignment and fix, reduced the operation easier of fiber fault location equipment widely.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. fiber fault location equipment, described equipment comprises that light source, pulse generator, control circuit, output light signal amplify modulation module, circulator and reflected light signal receiver module, it is characterized in that, described equipment also comprises optical time domain reflection wavelength selection module, described optical time domain reflection wavelength selects module to be combined by optical switch and array waveguide grating, described optical switch connects the optical channel output optical time domain reflection light signal of one tunnel described array waveguide grating under the control of described control circuit.
2. fiber fault location equipment as claimed in claim 1, it is characterized in that, described output light signal amplifies modulation module and is specially injection locking fabry-Perot type laser or reflective semiconductor optical amplifier, and described injection locking fabry-Perot type laser or reflective semiconductor optical amplifier amplify and the optical time domain reflection data-modulated described optical time domain reflection light signal by described pulse generator.
3. a fiber failure localization method is characterized in that, described method comprises:
Fiber fault location equipment detects uplink and breaks down, and notifies the optical link termination equipment corresponding with described uplink to cut off the transmission of downlink data;
Described fiber fault location equipment produces the line diagnosis signal, and described line diagnosis signal is sent to described optical link termination equipment;
Described optical link termination equipment amplifies described line diagnosis signal, and sends described line diagnosis signal;
Described fiber fault location equipment receives the light signal that reflects, and selects described line diagnosis signal from described light signal, and according to the analysis processing result to described line diagnosis signal, the particular location that reports optical fiber to break down to NM server.
4. fiber failure localization method as claimed in claim 3, it is characterized in that, described optical link termination equipment is made up of controllable electrical switches and injection locking fabry-Perot type laser, correspondingly, described optical link termination equipment amplifies described line diagnosis signal and is specially: described injection locking fabry-Perot type laser amplifies described line diagnosis signal.
5. fiber failure localization method as claimed in claim 3, it is characterized in that, described optical link termination equipment is made up of controllable electrical switches and reflective semiconductor optical amplifier, correspondingly, described optical link termination equipment amplifies described line diagnosis signal and is specially: described reflective semiconductor optical amplifier amplifies described line diagnosis signal.
6. fiber failure localization method as claimed in claim 3, it is characterized in that, describedly select described line diagnosis signal be specially from described light signal: described fiber fault location equipment is selected described line diagnosis signal by tunable optical filter from the light signal that carries described line diagnosis signal.
7. a fiber failure positioner is characterized in that, described device comprises control module, modulation module, sending module and fiber failure locating module;
Whether described control module is used to detect uplink and breaks down, and when detecting described uplink and break down, sends notice to described modulation module and sending module;
Described modulation module produces the line diagnosis signal, and described line diagnosis signal is sent to described sending module after being used to receive the notice of described control module transmission;
Described sending module is used to receive the line diagnosis signal of described modulation module transmission and the notice that control module sends, and after receiving the notice that described control module sends, cut off the transmission of downlink data, the described line diagnosis signal of receiving is modulated on the optical link termination equipment carries out descending transmission;
Described fiber failure locating module is used to receive the line diagnosis signal that reflects on the fibre circuit, and according to the analysis processing result to described line diagnosis signal, the particular location that reports optical fiber to break down to NM server.
8. fiber failure positioner as claimed in claim 7 is characterized in that, described control module comprises signal error rate detecting unit, received optical power detecting unit and notice transmitting element;
Whether the signal error rate that described signal error rate detecting unit is used to detect uplink deterioration takes place, and testing result is sent to described notice transmitting element;
Whether described received optical power detecting unit is used to detect the received optical power of uplink undergos mutation, and testing result is sent to described notice transmitting element;
Described notice transmitting element is used to receive signal error rate generation deterioration or/and after the testing result that received optical power is undergone mutation, send notice to described modulation module and sending module.
9. fiber failure positioner as claimed in claim 8 is characterized in that, described sending module comprises notice receiving element, amplifying unit and transmitting element;
Described notice receiving element is used to receive the notice that described notice transmitting element sends, and the described notice that will receive sends to described transmitting element;
Described amplifying unit is used to receive the line diagnosis signal that described modulation module sends, and described line diagnosis signal is amplified, and the described line diagnosis signal after amplifying is sent to described transmitting element;
Described transmitting element cuts off the transmission of downlink data after being used to receive the notice that described notice receiving element sends, and the line diagnosis signal of receiving is modulated on the optical link termination equipment carries out descending transmission.
10. fiber failure positioner as claimed in claim 7 is characterized in that, described fiber failure locating module comprises analysis and processing unit and reports the unit;
Described analysis and processing unit is used to receive the line diagnosis signal that reflects on the fibre circuit, and described line diagnosis signal is carried out analyzing and processing, obtains the more specific location information that optical fiber breaks down, and described information is sent to the described unit that reports;
The described unit that reports is used to receive the information that described analysis and processing unit sends, and described information is reported NM server.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101184290A CN101079668B (en) | 2007-07-05 | 2007-07-05 | Device, method and device for positioning the optical fiber failure |
| PCT/CN2008/071560 WO2009006837A1 (en) | 2007-07-05 | 2008-07-04 | A system for optical fiber detection, an optical wavelength division multiplexing network system and a method for optical fiber fault localization |
| KR1020097026051A KR101120152B1 (en) | 2007-07-05 | 2008-07-04 | A system for optical fiber detection, an optical wavelength division multiplexing network system and a method for optical fiber fault localization |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007101184290A CN101079668B (en) | 2007-07-05 | 2007-07-05 | Device, method and device for positioning the optical fiber failure |
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| CN101079668B CN101079668B (en) | 2011-07-20 |
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| CN2007101184290A Active CN101079668B (en) | 2007-07-05 | 2007-07-05 | Device, method and device for positioning the optical fiber failure |
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| KR (1) | KR101120152B1 (en) |
| CN (1) | CN101079668B (en) |
| WO (1) | WO2009006837A1 (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2009006837A1 (en) | 2009-01-15 |
| KR101120152B1 (en) | 2012-03-22 |
| KR20100019515A (en) | 2010-02-18 |
| CN101079668B (en) | 2011-07-20 |
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