CN104683025B - A method of detection Optical Distribution Network - Google Patents
A method of detection Optical Distribution Network Download PDFInfo
- Publication number
- CN104683025B CN104683025B CN201310631619.8A CN201310631619A CN104683025B CN 104683025 B CN104683025 B CN 104683025B CN 201310631619 A CN201310631619 A CN 201310631619A CN 104683025 B CN104683025 B CN 104683025B
- Authority
- CN
- China
- Prior art keywords
- pon
- optical
- mouthfuls
- light
- shunt device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Optical Communication System (AREA)
Abstract
The invention discloses a kind of methods for detecting Optical Distribution Network ODN, a built-in OTDR optical module and an optical shunt device in PON board, the input terminal of OTDR optical module output end connection optical shunt device, multiple output ports of optical shunt device are coupled with the PON mouth optical module output end on PON board respectively, and it is rendered as PON mouthfuls of physics respectively, optical link detection is carried out for the ODN of each PON mouthfuls access.Since the present invention only needs a built-in OTDR optical module in single PON board, so that it may which realization detects each PON mouthfuls of ODN accessed of the PON board, can greatly save the cost of optical link detection.
Description
Technical field
The present invention relates to field of optical networks, in particular to a kind of method for detecting Optical Distribution Network (ODN).
Background technique
Passive optical network (PON) technology is to realize the mainstream technology of intelligent acess (FTTx), and Fig. 1 provides for the prior art
PON networking structure figure, as shown, the PON is by local side apparatus optical line terminal (OLT), user equipment optical network unit
(ONU) and Optical Distribution Network (ODN) composition, OLT carry out information exchange by ODN and ONU, and information is carried on optical fiber and is uploaded
Defeated, passive in PON refers to that OND is by optical fiber and optical splitter without containing any active electronic device and electronic power supply in ODN
The Passive Optical Components such as part composition, transmits the information between OLT and ONU.
In pon, in order to guarantee ODN transmission information it is normal, need in ODN fiber lengths, optical fiber transmission attenuation value,
Connector decaying and fault location etc. carry out detection positioning, debug, therefore optical time domain reflectometer (OTDR) is arranged in pon
Optical module detects ODN, which is produced by the Rayleigh scattering transmitted in a fiber using light and Fresnel reflection
Backscattering and manufactured accurate optoelectronic integration instrument.Due to having optical splitter in pon, and use arborizations knot
Therefore how structure OTDR optical module is arranged in pon and how to be carried out the detection of ODN using OTDR optical module in pon, at
For a urgent problem to be solved.
Currently, there are mainly two types of the methods for using OTDR optical module to detect ODN in pon, individually below in detail
Explanation.
First method, external OTDR optical module detection method access OTDR optical module in the local side apparatus side of PON
Onto the optical fiber of ODN, that is, by the external local side apparatus side to PON of OTDR optical module, will be visited by multiplexing demultiplexing device
It surveys light wave to be coupled in the optical fiber of ODN, carries out the detection of ODN.
Second method, built-in OTDR optical module detection method are each PON mouthfuls in the PON board in the OLT of PON
One OTDR optical module is set, that is, multiple OTDR optical modules are separately positioned at multiple PON mouthfuls in PON board, is sent out
ODN of the light of specific wavelength as PON mouthfuls of accesses corresponding to detection light detection is penetrated, this mode there will not be shadow to existing ODN
It rings, it is only necessary to which PON board is transformed, it is easy to accomplish.
Fig. 2 is the PON board structure schematic diagram of OTDR built in the prior art, comprising: PON board 201 has multiple PON
Mouth optical module 202, each PON mouthfuls of optical module 202 provide one PON mouthfuls, and OTDR light is integrated in each PON mouthfuls of optical module 202
Module 203 carries out ODN204 detection by the PON mouth emission detection light of the PON mouthfuls of optical module 202 to the ODN204 of access.
ODN is detected using external OTDR optical module detection method according to first method, due to external OTDR optical mode
The introducing of block will increase fault point and increase the power Insertion Loss of ODN, and require setting external OTDR light in each side OLT
Module, cost are relatively high.
ODN is detected using built-in OTDR optical module detection method according to the second way, there are the following problems: 1) needing
OTDR optical module is integrated in each PON mouthfuls of optical module, cost is relatively high；2) the PON mouth number in each PON board of the side OLT
Mesh is stepped up by 4 to 16, and as the PON mouth number in PON board increases, cost further increases；3) it is being examined
When survey, the integrated OTDR optical module transmission power of each PON mouthfuls of optical modules in each PON board be both needed to according to needed for ODN most
High-power configuration, waste of resource.
Summary of the invention
In view of this, the present invention provides a kind of device for detecting ODN, which can save the testing cost of optical link.
The present invention also provides a kind of method for detecting ODN, this method can save the testing cost of optical link.
In order to achieve the above objectives, what the present invention was implemented is specifically achieved in that
A kind of device detecting Optical Distribution Network ODN, which includes: an OTDR light being placed in PON board (301)
Module (302) and an optical shunt device (303), wherein
The output end of OTDR optical module (302) is linked into the input terminal of optical shunt device (303), optical shunt device (303)
Multiple output ends be coupled into one PON mouthfuls with each PON mouthfuls of optical module output ends in PON board (301) respectively
(304), OTDR optical module (302) is through optical shunt device (303) to the ODN of each PON mouthfuls (304) access of PON board (301)
(305) optical link detection is carried out.
The number of multiple output ends of the optical shunt device (303) is PON mouthfuls of (304) numbers.
The device further include: OTDR optical module (302) is given optical shunt device (303) for that will detect light emitting, receives and
From after the light by the ODN network reflections under PON mouthfuls multiple (304) of optical shunt device (303), according to detection light and multiple
The reflected light of PON mouthfuls (304), determine PON mouthfuls multiple (304) access ODN(305) with the presence or absence of failure, fault type and
Abort situation；
The splitting ratio of optical shunt device (303), the detection gloss setting for emitting OTDR optical module (302) is divided
Afterwards, multiple PON mouthfuls (304) coupled are sent respectively to, multiple PON mouthfuls of reflected lights is received, is sent to OTDR optical module
(302).
The device further determine that PON mouthfuls multiple (304) access ODN(305) in which PON mouthful (304) access
ODN(305) failure, further includes:
OTDR optical module (302) is also used to determine the reflection of PON mouthfuls specific (304) according to the mode for cut-offfing PON mouthfuls
Light determines the ODN of PON mouthfuls specific (304) access according to the detection light and reflected light of PON mouthfuls specific (304)
(305) whether failure.
The device further determine that PON mouthfuls multiple (304) access ODN(305) in which PON mouthful (304) access
ODN(305) failure, further includes:
OTDR optical module (302), the detection light emitting for being also used to set wavelength are given optical shunt device (303), and light is received
After the reflected light for the setting wavelength that shunt device (303) returns, PON mouthfuls corresponding (304) are determined according to setting wavelength, according to spy
Survey light and set wavelength reflected light determine PON mouthfuls corresponding (304) access ODN(305) whether failure；
Optical shunt device (303) is pressed after receiving the detection light for setting wavelength that OTDR optical module (302) emit
After set splitting ratio light splitting, the detection light for setting wavelength is sent to corresponding PON mouthfuls (304) coupled, is detected
The ODN(305 of PON mouthfuls corresponding (304) access), receive the reflected light of the setting wavelength of PON mouthfuls corresponding (304)
Afterwards, OTDR optical module (302) are sent to.
The device further include:
OTDR optical module (302), the detection light emitting for that will set wavelength are given optical shunt device (303), and light point is received
After the reflected light for the setting wavelength that road device (303) is sent, PON mouthfuls corresponding (304) are determined according to setting wavelength, according to detection
Light with setting wavelength reflected light determine PON mouthful corresponding (304) access ODN(305) whether failure；
Optical shunt device (303) is pressed after receiving the detection light for setting wavelength that OTDR optical module (302) emit
After set splitting ratio light splitting, the detection light for setting wavelength is sent to corresponding PON mouthfuls (304) coupled, is detected
The ODN(305 of PON mouthfuls corresponding (304) access), receive the reflected light of the setting wavelength of PON mouthfuls corresponding (304)
Afterwards, OTDR optical module (302) are sent to
Adjustment is set dynamically in the splitting ratio of the optical shunt device (303), and splitting ratio is OTDR optical module optical power and PON
Ratio between mouth optical power.
A method of detection Optical Distribution Network ODN, which is characterized in that an OTDR optical module is set on PON board
With an optical shunt device, this method comprises:
OTDR optical module is coupled to after optical shunt device is divided to optical shunt device emission detection light, the detection light
The PON mouth of PON board, returns to reflected light through optical shunt device；
OTDR optical module according to detection light and reflection light detection PON mouthful access ODN whether failure.
The transmitting light is after optical shunt device is divided, when being coupled to one PON mouthfuls of PON board, comprising:
The detection light is the detection light of the corresponding PON mouthfuls of wavelength；
Splitting ratio is arranged in optical shunt device, and the detection light of the corresponding PON mouthfuls of wavelength is by optical shunt device according to setting
After splitting ratio light splitting, it is coupled to the PON mouth of PON board；
The reflected light is the reflected light of the corresponding PON mouthfuls of wavelength；
The OTDR detects the ODN of PON mouthful accesses whether before failure, and the reflected light according to the PON mouthfuls of wavelength of correspondence is true
It is the PON mouthfuls fixed.
The transmitting light is after optical shunt device is divided, when being coupled to multiple PON mouthfuls of PON board, comprising:
The detection light is the detection light of specific wavelength；
Splitting ratio is arranged in optical shunt device, and the detection light of specific wavelength is by optical shunt device according to the light splitting score of setting
After light, it is coupled to multiple PON mouthfuls of PON board；
The reflected light is the reflected light of specific wavelength；
The OTDR detects the ODN that PON mouthfuls are accessed, and whether failure is the multiple PON mouthfuls of ODN being respectively connected to of detection whether former
Barrier.
Multiple PON mouthfuls of ODN being respectively connected to are detected whether after failure, further determine which PON mouthfuls of access therein
ODN failure:
Detection light of the OTDR optical module to optical shunt device transmitting specific wavelength；
After the detection light of specific wavelength is divided by the optical shunt device, it is coupled to by the way of cut-offfing PON mouthfuls specific
PON mouth after, this it is specific PON mouthfuls return specific wavelength reflected light；
The OTDR optical module of the setting reflected light of PON mouthfuls of specific wavelengths and detection light based on the received, are determined specific
The ODN of specific PON mouthfuls of accesses of failure.
Multiple PON mouthfuls of ODN being respectively connected to are detected whether after failure, further determine which PON mouthfuls of access therein
ODN failure:
For different PON mouths, OTDR optical module sends the detection light of different wave length, different wave length correspond to it is PON mouthfuls different,
After optical shunt device is divided according to splitting ratio, the PON will be sent to for the detection light of the wavelength after PON mouthfuls of light splitting
Mouthful, the reflected light of the corresponding PON mouthfuls of the wavelength is returned, feeds back to OTDR optical module, OTDR optical mode root tuber through optical shunt device
According to the reflected light and detection light of the wavelength of the received correspondence PON, the ODN of the PON mouth access of specific failure is determined.
The splitting ratio dynamic of the optical shunt device adjusts, and splitting ratio is OTDR optical module optical power and PON mouthfuls of optical powers
Between ratio.
As can be seen from the above scheme, a present invention built-in OTDR optical module and optical splitter in PON board
Part, the OTDR optical module output end connect optical shunt device input terminal, multiple output ports of optical shunt device respectively with PON
PON mouth optical module output end coupling on board, and it is rendered as PON mouthfuls of physics respectively, for the ODN of each PON mouthfuls access
Carry out optical link detection.Since the present invention only needs a built-in OTDR optical module in single PON board, so that it may realize to this
The each PON mouthfuls of ODN accessed of PON board are detected, and the cost of optical link detection can be greatlyd save.
Detailed description of the invention
Fig. 1 is the PON networking structure figure that the prior art provides；
Fig. 2 is the PON board structure schematic diagram of OTDR built in the prior art；
Fig. 3 is the apparatus structure schematic diagram of detection ODN provided in an embodiment of the present invention；
Fig. 4 is the method flow diagram of detection ODN provided in an embodiment of the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention more comprehensible, right hereinafter, referring to the drawings and the embodiments,
The present invention is described in further detail.
The present invention detects the cost of optical link in order to save, a built-in OTDR optical module and a light in PON board
Shunt device, the OTDR optical module output end connect the input terminal of optical shunt device, multiple output ports point of optical shunt device
It is not coupled with the PON mouth optical module output end on PON board, and is rendered as PON mouthfuls of physics respectively, connect for each PON mouthfuls
The ODN entered carries out optical link detection.Since the present invention only needs a built-in OTDR optical module in single PON board, so that it may real
Now each PON mouthfuls of ODN accessed of the PON board are detected, the cost of optical link detection can be greatlyd save.
Fig. 3 is the apparatus structure schematic diagram of detection ODN provided in an embodiment of the present invention, which includes: to be placed in PON board
An OTDR optical module 302 and an optical shunt device 303 in 301, wherein the output end of OTDR optical module 302 is linked into
The input terminal of optical shunt device 303, multiple output ends of optical shunt device 303 respectively with each PON mouthfuls in PON board 301
Optical module output end coupling one PON mouth 304 of access, OTDR optical module 302 is through optical shunt device 303 to PON board 301
The ODN305 detection that each PON mouth 304 accesses.
In the apparatus, each PON mouth 304 in PON board 301 is the output port of each PON mouthfuls of optical module.
In the apparatus, the number of multiple output ends of the optical shunt device 303 is 304 number of PON mouth.
In the apparatus, OTDR optical module 302 uses adjustable wavelength laser, when detecting, by the detection of required wavelength
After light output is divided to optical shunt device 303, by the detection after light splitting optically coupling to PON mouth 304.
In the apparatus, optical shunt device 303 is to from the received detection photaesthesia of OTDR optical module 302, and can be with
It detects the difference of light and dynamically adjusts splitting ratio, and can accomplish to lead directly to the detection light from some PON mouth 304.The optical branching
The realization principle of device 303 are as follows: parallel twi guide structure is used, it is appropriate to reduce coupling by suitably elongating its gradual change section length
The core diameter in area can increase the wavelength sensitivity of splitting ratio, and then realize the characteristics of mechanical periodicity is presented with wavelength in dichroism.
In the apparatus, OTDR optical module 302 is accessed through each PON mouth 304 of the optical shunt device 303 to PON board 301
ODN305 detection specifically:
OTDR optical module 302 receives what optical shunt device 303 was sent for that will detect light emitting to optical shunt device 303
After multiple PON mouthfuls of reflected light, according to the reflected light of detection light and multiple PON mouth 304, multiple PON mouth 304 is determined
The ODN305 of access whether there is failure, fault type and abort situation；
Optical shunt device 303, after receiving the detection light that OTDR optical module 302 emits, using the light splitting score of setting
After light, it is sent respectively to the multiple PON mouths 304 coupled, after the reflected light for receiving multiple PON mouth 304, is sent to
OTDR optical module 302.
In the apparatus, specifically determine in multiple PON mouth 304 ODN305 which PON mouth 304 accesses whether failure
PON mouthfuls of identification means can be used, specifically: the reflected light of PON mouth 304 carries PON mouthfuls of marks, and OTDR optical module 302
It is identified according to the PON mouth 304 that the reflected light of received PON mouth 304 carries, identifies PON mouth 304, and then specifically identify PON mouthfuls specific
Whether the ODN305 of 304 accesses is faulty.
There are two types of implementations for which: the first are as follows: to PON mouth 304 by the way of opening section, need which is tested
PON mouth 304 turns on the detection that the PON mouth 304 carries out optical link；It is another are as follows: to be sent not through optical shunt device 303 respectively again
The detection light of co-wavelength gives corresponding PON mouth 304, according to the reflected light and spy of the different wave length of the correspondence PON mouth 304 fed back
Survey light determine PON mouth 304 access ODN305 whether failure.
Both modes of detailed description below.
First way:
In the apparatus, OTDR optical module 302 determines respectively according to after the reflected light of detection light and multiple PON mouth 304
The ODN305 that multiple PON mouth 304 accesses whether failure specifically:
OTDR optical module 302 is also used to the mode that basis cut-offs PON mouthfuls, determines the reflected light of specific PON mouth 304,
According to the detection light and reflected light of the specific PON mouth 304, determine whether the ODN305 that the specific PON mouth 304 accesses is former
Barrier.
The second way:
OTDR optical module 302 determines PON mouthfuls multiple respectively according to after the reflected light of detection light and multiple PON mouth 304
304 access ODN305 whether failure specifically:
OTDR optical module 302, the detection light emitting for that will set wavelength receive optical splitter to optical shunt device 303
After the reflected light for the setting wavelength that part 303 is sent, corresponding PON mouth 304 is determined according to setting wavelength, according to detection light and is set
The long reflected light of standing wave determine the corresponding access of PON mouth 304 ODN305 whether failure；
Optical shunt device 303, after receiving the detection light for setting wavelength that OTDR optical module 302 emits, according to institute
After the splitting ratio light splitting of setting, the detection light for setting wavelength is sent to the corresponding PON mouth 304 coupled, detects the correspondence
PON mouth 304 access ODN305, receive corresponding PON mouth 304 set wavelength reflected light after, be sent to OTDR
Optical module 302.
In another example, OTDR optical module 302 is through optical shunt device 303 to each PON mouthfuls of PON board 301
The ODN305 detection of 304 accesses specifically:
OTDR optical module 302, the detection light emitting for that will set wavelength receive optical splitter to optical shunt device 303
After the reflected light for the setting wavelength that part 303 is sent, corresponding PON mouth 304 is determined according to setting wavelength, according to detection light and is set
The long reflected light of standing wave determine the corresponding access of PON mouth 304 ODN305 whether failure；
Optical shunt device 303, after receiving the detection light for setting wavelength that OTDR optical module 302 emits, according to institute
After the splitting ratio light splitting of setting, the detection light for setting wavelength is sent to the corresponding PON mouth 304 coupled, detects the correspondence
PON mouth 304 access ODN305, receive corresponding PON mouth 304 set wavelength reflected light after, be sent to OTDR
Optical module 302.
Fig. 4 is the method flow diagram of detection ODN provided in an embodiment of the present invention, and an OTDR is arranged in each PON board
Optical module and an optical shunt device, the specific steps are that:
Step 401, the OTDR optical module emission detection light being arranged are to the optical shunt device being arranged；
Step 402, setting optical shunt device will detect light light splitting according to the splitting ratio of setting after, be sent to and coupled
PON mouthfuls, PON mouthfuls of reflected light is received, the OTDR optical module of setting is sent to；
In this step, detection light is sent to coupled PON mouth, exactly detects the ODN of PON mouthfuls of accesses, PON mouthfuls connect
The ODN entered will reflect detection light, and reflected light back is returned PON mouthfuls；
Step 403, the OTDR optical module being arranged determine PON mouthfuls according to the detection light and received PON mouthfuls of transmitting light of transmitting
With the presence or absence of failure, fault type and abort situation etc.；
In this step, OTDR optical module is that OTDR optical module is solid how according to detection light and received PON mouthfuls of transmitting light
Some abilities, which is not described herein again.
In the present invention, the splitting ratio of optical shunt device setting can be adjusted dynamically as needed.
In the method, the calculation formula of each PON mouthfuls of optical power P on PON board is as shown in Equation (1):
Formula (1)
Wherein, p0For OTDR optical mode block mode detect PON mouthful access ODN when required minimum optical power, be traditionally arranged to be
PON board nominal value；N is the splitting ratio of optical shunt device used by PON mouthfuls of access ODN；D is PON mouthfuls and PON mouthfuls of accesses
Fiber lengths between optical shunt device used by ODN can be obtained by distance measuring method；L0For PON mouthfuls and PON mouthfuls of access ODN
Optical fiber inherent loss between used optical shunt device, common engineering calculate desirable empirical value 0.3dB/km； LeFor engineering
Surplus is traditionally arranged to be 1dB and is reserved.
It in the method, is the transmission power of OTDR optical module setting detection light, the transmission power and PON mouthfuls of light function
Rate ratio is exactly the splitting ratio that set optical shunt device corresponds to the PON mouthfuls of setting.
In the method, when detecting the ODN of PON mouthfuls of accesses using OTDR optical module, a PON can be directed to
Mouthful, for example, needed for the PON mouthful detect light optical power ratio it is larger when, for the PON mouthfuls detection；It can also be directed to multiple
PON mouthfuls, for example, this it is PON mouthfuls multiple needed for detection light optical power ratio it is smaller when, multiple PON mouthfuls is detected, is divided below
It does not mentionlet alone bright.
When detecting the ODN of PON mouthfuls of accesses using OTDR optical module, when can be directed to one PON mouthfuls, process are as follows:
The detection light of OTDR optical module transmitting specific wavelength in step 401；
The optical shunt device in step 402 by received specific wavelength detection light, according to PON to be tested
After the splitting ratio light splitting of mouth, it is coupled on the PON mouth, will be sent to from the reflected light of the PON mouthfuls of received specific wavelength
OTDR optical module；
The OTDR optical module of setting according to the detection light of transmitting and the reflected light of specific wavelength, determine the PON mouthful it is whether former
Barrier.
In this process, the optical power of detection light may be bigger needed for the PON mouthfuls, sometimes with OTDR optical module
The optical power for sending detection light is identical, and optical shunt device is 1:1 for the PON mouthfuls of splitting ratio, and at this moment, which exists
It is equivalent to through-type device in logic, forwards the detection light of the specific wavelength and the reflected light of specific wavelength, identifies the PON
Mouthful, Insertion Loss is smaller.
As the ODN for detecting PON mouthfuls of accesses using OTDR optical module, when being directed to PON mouthfuls multiple, process are as follows:
The detection light of OTDR optical module transmitting specific wavelength in step 401；
The optical shunt device in step 402 by received specific wavelength detection light, according to it is to be tested
After the detection light of specific wavelength is divided by multiple PON mouthfuls of splitting ratios, it is coupled on multiple PON mouth, respectively from multiple PON
The reflected light of the received specific wavelength of mouth is sent to OTDR optical module；
The OTDR optical module of setting based on the received the reflected light of multiple PON mouthfuls of specific wavelength and detection light, determine this
Multiple PON mouthfuls with the presence or absence of failure, abort situation and fault type etc..
Determine this multiple PON mouthfuls it is faulty after, confirm this it is PON mouthfuls multiple in specific which PON mouthfuls it is faulty,
It can be in the following ways:
The optical shunt device will specific wavelength detection light be divided after, be coupled to it is PON mouthful multiple after, PON mouthfuls return
PON mouthfuls of marks of carrying when the reflected light of specific wavelength；
The OTDR optical module of setting corresponds to the reflected light and detection of the PON mouth specific wavelength of PON mouthfuls of marks based on the received
Light determines that out the PON mouth of specific failure.
In this case, there are two types of modes, specifically:
First way: detection light of the OTDR optical module to optical shunt device transmitting specific wavelength；
After the detection light of specific wavelength is divided by optical shunt device, specific PON is coupled to by the way of cut-offfing PON mouthfuls
After mouthful, the reflected light of the specific PON mouthfuls of return specific wavelength；
The OTDR optical module of the setting reflected light of PON mouthfuls of specific wavelengths and detection light based on the received, are determined specific
The ODN of specific PON mouthfuls of accesses of failure.
The second way, for different PON mouths, OTDR optical module sends the detection light of different wave length, the different wave length
Corresponding different PON mouthfuls, after optical shunt device is divided, this will be sent to for the detection light of the wavelength after PON mouthfuls of light splitting
PON mouthfuls, the ODN detection of the PON mouthfuls of access is carried out, the reflected light of the corresponding PON mouthfuls of wavelength is returned, is fed back through optical shunt device
OTDR optical module is given, OTDR optical module corresponds to the reflected light and detection light of the wavelength of the PON based on the received, determines specific
The PON mouth of failure.
In the present invention, as the ODN for detecting specific PON mouthfuls of access using the OTDR optical module for being integrated in PON board
After failure, the detection information and positioning PON message breath can be reported to PON network management platform, start subsequent artefacts' troubleshooting work
Make.
It can be seen that the present invention from device and method provided by the invention and only integrate an OTDR on each PON board
Optical module reduces PON board cost.The ODN power that can be accessed according to the PON mouth on PON board, it is corresponding to reduce and adjust
The splitting ratio of whole optical shunt device reduces the Insertion Loss of optical shunt device, meets on PON board individually or needed for several PON mouthfuls
Detection light transmitting light power requirements, better adapt under complex environment OTDR optical module setting optical power, deployment more
Add flexibly.The present invention can also detect simultaneously the ODN of several PON mouthfuls of access on PON board using single wavelength, improve
Detection efficiency further reduced the detection PON message breath for needing to handle and store in real time.
It is above to lift preferred embodiment, the object, technical solutions and advantages of the present invention are had been further described, institute
It should be understood that the foregoing is merely illustrative of the preferred embodiments of the present invention, it is not intended to limit the invention, it is all of the invention
Spirit and principle within, made any modifications, equivalent replacements, and improvements etc., should be included in protection scope of the present invention it
It is interior.
Claims (4)
1. a kind of method for detecting Optical Distribution Network ODN, which is characterized in that be arranged on PON board OTDR optical module and
One optical shunt device, this method comprises:
OTDR optical module is coupled to PON plate after optical shunt device is divided to optical shunt device emission detection light, the detection light
The PON mouth of card, returns to reflected light through optical shunt device；
OTDR optical module according to detection light and reflection light detection PON mouthful access ODN whether failure；
The detection light is after optical shunt device is divided, when being coupled to one PON mouthfuls of PON board, comprising:
The detection light is the detection light of the corresponding PON mouthfuls of wavelength；
Splitting ratio is arranged in optical shunt device, and the detection light of the corresponding PON mouthfuls of wavelength is by optical shunt device according to the light splitting of setting
After light splitting, it is coupled to the PON mouth of PON board；
The reflected light is the reflected light of the corresponding PON mouthfuls of wavelength；
The OTDR detects the ODN of PON mouthful accesses whether before failure, is somebody's turn to do according to the reflected light of the corresponding PON mouthful wavelength is determining
PON mouthfuls；
The detection light is after optical shunt device is divided, when being coupled to multiple PON mouthfuls of PON board, comprising:
The detection light is the detection light of specific wavelength；
Splitting ratio is arranged in optical shunt device, and the detection light of specific wavelength is divided by optical shunt device according to the splitting ratio of setting
Afterwards, it is coupled to multiple PON mouthfuls of PON board；
The reflected light is the reflected light of specific wavelength；
The OTDR detect PON mouthful accesses ODN whether failure be detect multiple PON mouthfuls of ODN being respectively connected to whether failure.
2. the method as described in claim 1, which is characterized in that multiple PON mouthfuls of ODN being respectively connected to are detected whether after failure,
Further determine that the ODN failure of which PON mouthfuls of access therein:
Detection light of the OTDR optical module to optical shunt device transmitting specific wavelength；
After the detection light of specific wavelength is divided by the optical shunt device, specific PON is coupled to by the way of cut-offfing PON mouthfuls
After mouthful, the reflected light of the specific PON mouthfuls of return specific wavelength；
The OTDR optical module of the setting reflected light of PON mouthfuls of specific wavelengths and detection light based on the received, determine specific failure
Specific PON mouthfuls access ODN.
3. the method as described in claim 1, which is characterized in that multiple PON mouthfuls of ODN being respectively connected to are detected whether after failure,
Further determine that the ODN failure of which PON mouthfuls of access therein:
For different PON mouths, OTDR optical module sends the detection light of different wave length, different wave length correspond to it is PON mouthfuls different, through light
After shunt device is divided according to splitting ratio, it will be sent to the PON mouthfuls for the detection light of the wavelength after PON mouthfuls of light splitting, returned
The reflected light for returning the corresponding PON mouthfuls of the wavelength, feeds back to OTDR optical module through optical shunt device, OTDR optical module is according to reception
The correspondence PON wavelength reflected light and detection light, determine the ODN that PON mouth of specific failure accesses.
4. the method as described in claims 1 to 3 is any, which is characterized in that the splitting ratio dynamic of the optical shunt device adjusts,
Ratio of the splitting ratio between OTDR optical module optical power and PON mouthfuls of optical powers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310631619.8A CN104683025B (en) | 2013-12-02 | 2013-12-02 | A method of detection Optical Distribution Network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310631619.8A CN104683025B (en) | 2013-12-02 | 2013-12-02 | A method of detection Optical Distribution Network |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104683025A CN104683025A (en) | 2015-06-03 |
| CN104683025B true CN104683025B (en) | 2019-03-15 |
Family
ID=53317673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310631619.8A Active CN104683025B (en) | 2013-12-02 | 2013-12-02 | A method of detection Optical Distribution Network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104683025B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102098098A (en) * | 2009-12-14 | 2011-06-15 | 中兴通讯股份有限公司 | System for detecting fiber faults of passive optical network |
| EP2337240A1 (en) * | 2009-12-15 | 2011-06-22 | Alcatel Lucent | Multichannel WDM-PON module with integrated OTDR function |
| CN102571199A (en) * | 2011-12-31 | 2012-07-11 | 中兴通讯股份有限公司 | Optical fiber fault detection method and optical fiber fault detection device |
-
2013
- 2013-12-02 CN CN201310631619.8A patent/CN104683025B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102098098A (en) * | 2009-12-14 | 2011-06-15 | 中兴通讯股份有限公司 | System for detecting fiber faults of passive optical network |
| EP2337240A1 (en) * | 2009-12-15 | 2011-06-22 | Alcatel Lucent | Multichannel WDM-PON module with integrated OTDR function |
| CN102571199A (en) * | 2011-12-31 | 2012-07-11 | 中兴通讯股份有限公司 | Optical fiber fault detection method and optical fiber fault detection device |
Non-Patent Citations (1)
| Title |
|---|
| PON网络光链路监测的挑战与解决方案分析研究;任艳 等;《广东通信技术》;20120215;第2-5页 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104683025A (en) | 2015-06-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102714545B (en) | Optical transceiver module, passive optical network system, optical fiber detection method and system | |
| CN101984561B (en) | System and method for detecting optical fiber faults of passive optical network | |
| US8290364B2 (en) | Method, optical network and network device for locating fiber events | |
| CN105530046B (en) | Realize the method and system that luminous power and branch off attenuation failure are tested automatically | |
| CN102412902B (en) | With the optical network unit photoelectric device of time domain reflection function | |
| CN104009795A (en) | OTDR optical path detection device and method thereof | |
| CN101442691A (en) | Optical cable monitoring system based on passive optical network system | |
| US10944498B2 (en) | Device and method for monitoring two-stage faults of TDM-PON with high precision | |
| CN107332101A (en) | It is a kind of can Dynamic Execution optical time domain reflection detection component and detection method | |
| CN102752051A (en) | Optical component of optical network unit with optical time domain reflection function | |
| CN107925477A (en) | Monitored using the optical-fiber network of photon switch | |
| CN202679371U (en) | Optical network unit optical assembly with optical time domain reflection function | |
| CN102684779A (en) | Centralized measurement device, failure monitoring method and system | |
| CN201369727Y (en) | Optical line terminal | |
| CN105577268B (en) | Optical network device, optical module and optical link detection method | |
| CN104205676B (en) | Optical line terminal, optical transceiver module, system and optical fiber detecting method | |
| CN107070544A (en) | Optical assembly, detecting devices and decision method using the optical assembly | |
| CN104009794A (en) | Method and apparatus for detecting fault in optical fiber of passive optical network | |
| CN102761371A (en) | Optical component with optical time domain reflection function | |
| CN102882596B (en) | A kind of optical assembly and method of work, passive optical network equipment | |
| CN102937734B (en) | There is the optical network unit three-dimensional optical assembly of optical time domain signal reflex function | |
| CN104683025B (en) | A method of detection Optical Distribution Network | |
| CN202455358U (en) | Optical network unit photoelectric device provided with optical time domain reflection function | |
| CN103973361B (en) | The optical fiber fault detecting system of EPON and method | |
| CN202798724U (en) | Optical line terminal photoelectric device with built-in optical time domain reflecting function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |