CN105991187B - A kind of method, apparatus and optical line terminal of optical splitter environmental monitoring - Google Patents
A kind of method, apparatus and optical line terminal of optical splitter environmental monitoring Download PDFInfo
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- CN105991187B CN105991187B CN201510066684.XA CN201510066684A CN105991187B CN 105991187 B CN105991187 B CN 105991187B CN 201510066684 A CN201510066684 A CN 201510066684A CN 105991187 B CN105991187 B CN 105991187B
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Abstract
The present invention provides a kind of method, apparatus and optical line terminal of optical splitter environmental monitoring, are related to the communications field, solve the problems, such as that existing optical splitter environment control method is unsuitable for passive monitoring, and the method for the optical splitter environmental monitoring is applied to optical line terminal, including：The monitoring optical signal and the optical signal of upper layer network information that are generated in advance are multiplexed, light multiplexing signal is generated；Light multiplexing signal is sent to the one or more optical splitters being connect with optical line terminal, after so that optical splitter is divided light multiplexing signal, be sent to optical network unit and/or plated film tail optical fiber, plated film tail optical fiber be previously connected at least one optical splitter, the optical fiber sensitive to presetting environmental factor；The optical signal that optical splitter returns is received, including plated film tail optical fiber to the reflected light signal of monitoring optical signal；The reflected light signal returned to optical splitter parses, and the environmental information of optical splitter is obtained according to analysis result.The solution of the present invention realize it is passive under the conditions of monitoring to optical splitter environment.
Description
Technical field
The present invention relates to fiber optic communication field, more particularly to a kind of the method, apparatus and optical link of optical splitter environmental monitoring
Terminal.
Background technology
PON (Passive Optical Network, passive optical-fiber network) refers to ODN (Optical Distribution
Network, optical distribution network) in do not contain any electronic device and electronic power supply, ODN is all by Splitter (optical branching device)
Equal passive devices composition, does not need valuable active electronic devices.One PON includes an OLT for being installed on console for centralized control
(optical line terminal, optical line terminal), and a collection of mating ONUs (Optical for being installed on customer site
Network Unit, optical network unit).ODN between OLT and ONU contains optical fiber and passive optical splitters or couples
Device.
With the extensive application of PON, in order to reduce construction and maintenance cost, a large amount of level-one is used to be divided in a network
Device, even secondary light-splitting device.These light-splitting devices only have small part to be positioned over indoor computer room, are largely positioned over outdoor
Optical cross box.And optical splitter has particular/special requirement for use environment (such as temperature, humidity), thus it is urgently to be resolved hurrily to light-splitting device ring
The problem of border monitors.
Existing environmental monitoring means mainly monitor communications equipment room by the sensing devices such as electro-temperature or electric humidity
Environment.But existing electricity monitoring technology can only carry out environmental monitoring to communications equipment room, not be suitable for passive outdoor environment monitoring.
Invention content
The technical problem to be solved in the present invention is to provide a kind of method, apparatus of optical splitter environmental monitoring and optical link are whole
End solves the problems, such as that existing optical splitter environment control method is not suitable for passive environment monitoring.
In order to solve the above technical problems, the embodiment of the present invention provides a kind of method of optical splitter environmental monitoring, it is applied to
Optical line terminal, the method includes：
The monitoring optical signal being generated in advance and the optical signal of upper layer network information are subjected to multiplexing process, generate light multiplexing letter
Number, wherein the monitoring optical signal is different from the wavelength of optical signal of upper layer network information；
The light multiplexing signal is sent to the one or more optical splitters being connect with the optical line terminal, makes described point
After light device is divided the light multiplexing signal, it is sent to the optical network unit being connect with the optical splitter and/or plated film tail
Fibre, wherein the plated film tail optical fiber is to be previously connected at least one optical splitter, to presetting the sensitive optical fiber of environmental factor；
The optical signal that the optical splitter is returned according to the light multiplexing signal is received, wherein the light letter that the optical splitter returns
Number include the plated film tail optical fiber to it is described monitoring optical signal reflected light signal；
The reflected light signal is obtained in the optical signal that the optical splitter returns, and the reflected light signal is solved
Analysis, the environmental information residing for the optical splitter is obtained according to analysis result.
Wherein, described to obtain the reflected light signal in the optical signal that the optical splitter returns, and to the reflected light
Signal is parsed, and the environmental information residing for the optical splitter is obtained according to analysis result, including：
The optical signal returned to the optical splitter carries out demultiplexing processing, and the reflected light is obtained in the optical signal after demultiplexing
Signal；
The interference fringe of the reflected light signal is parsed, and obtains the preset attribute information of the interference fringe；
According to the environmental information residing for optical splitter described in the preset attribute acquisition of information.
Wherein, the interference fringe of the parsing reflected light signal, and obtain the preset attribute letter of the interference fringe
Breath, including：
The reflected light signal is amplified, parsing the reflected light according to the amplified reflected light signal believes
Number interference fringe, and obtain the preset attribute information of the interference fringe.
Wherein, the environmental information residing for optical splitter described in the preset attribute acquisition of information, including：
It is public according to the preset attribute information and the preset attribute information relationship corresponding with the default environmental factor
Formula obtains the corresponding value of the default environmental factor.
Wherein, the plated film tail optical fiber is coated with the film sensitive to presetting environmental factor, the default environmental factor in tail end
Including temperature or humidity；The preset attribute information includes the trough wavelength of the interference fringe；The preset attribute information with
The corresponding relation formula of the default environmental factor is：
λmin=2L (1+a Δ Z) (n+b Δ Z)/m
Wherein, λminFor the wavelength of the interference fringe, L is the thickness of the film, and a is the thermal expansion system of the film
Number, b are the thermo-optical coeffecient of the film, and n is the refractive index of the film, and Δ Z is the variable quantity of the default environmental factor, m
For the integer more than or equal to 1.
Wherein, described corresponding with the default environmental factor according to the preset attribute information and the preset attribute information
Relation formula further include after obtaining the corresponding value of the default environmental factor：
The corresponding value of the default environmental factor is reported as the upper layer webmaster, makes the upper layer webmaster to described default
The corresponding value of environmental factor is shown.
Wherein, the optical signal returned to the optical splitter carries out demultiplexing processing, is obtained in the optical signal after demultiplexing
After the reflected light signal, further include：
The reflected light signal and the monitoring optical signal are subjected to channel separation.
In order to solve the above technical problems, the embodiment of the present invention also provides a kind of device of optical splitter environmental monitoring, application
In optical line terminal, described device includes：
Multiplexing module, for carrying out the optical signal of the monitoring optical signal being generated in advance and upper layer network information at multiplexing
Reason generates light multiplexing signal, wherein the monitoring optical signal is different from the wavelength of optical signal of upper layer network information；
Sending module, for the light multiplexing signal to be sent to the one or more being connect with the optical line terminal point
Light device after so that the optical splitter is divided the light multiplexing signal, is sent to the optical-fiber network list being connect with the optical splitter
Member and/or plated film tail optical fiber, wherein the plated film tail optical fiber be previously connected at least one optical splitter, to default environment because
Plain sensitive optical fiber；
Receiving module, the optical signal returned according to the light multiplexing signal for receiving the optical splitter, wherein described point
The optical signal that light device returns includes reflected light signal of the plated film tail optical fiber to the monitoring optical signal；
Parsing module, for obtaining the reflected light signal in the optical signal that the optical splitter returns, and to described anti-
It penetrates optical signal to be parsed, the environmental information residing for the optical splitter is obtained according to analysis result.
Wherein, the parsing module includes：
Module is demultiplexed, the optical signal for being returned to the optical splitter carries out demultiplexing processing, in the optical signal after demultiplexing
Obtain the reflected light signal；
First analyzing sub-module, the interference fringe for parsing the reflected light signal, and obtain the interference fringe
Preset attribute information；
Acquisition module, for the environmental information residing for optical splitter described in the preset attribute acquisition of information.
Wherein, first analyzing sub-module includes：
Second analyzing sub-module is believed for being amplified to the reflected light signal according to the amplified reflected light
Number the interference fringe of the reflected light signal is parsed, and obtains the preset attribute information of the interference fringe.
Wherein, the acquisition module includes：
Acquisition submodule, for according to the preset attribute information and the preset attribute information and the default environment because
The corresponding relation formula of element obtains the corresponding value of the default environmental factor.
Wherein, described device further includes：
Reporting module, for reporting the corresponding value of the default environmental factor for the upper layer webmaster, make the upper layer
Webmaster shows the corresponding value of the default environmental factor.
Wherein, described device further includes：
Separation module, for the reflected light signal and the monitoring optical signal to be carried out channel separation.
In order to solve the above technical problems, the embodiment of the present invention also provides a kind of optical line terminal, including：As described above
The device of optical splitter environmental monitoring.
The above-mentioned technical proposal of the present invention has the beneficial effect that：
The method of the optical splitter environmental monitoring of the embodiment of the present invention believes the monitoring optical signal being generated in advance and upper layer network
The optical signal of breath is multiplexed, and after obtaining light multiplexing signal, light multiplexing signal is sent to optical splitter, wherein monitoring optical signal
Wavelength is different from the wavelength of the optical signal of upper layer network information；After optical splitter is divided light multiplexing signal, it is sent to light net
Network unit and/or plated film tail optical fiber, wherein plated film tail optical fiber are to be previously connected at least one optical splitter, is quick to default environmental factor
The optical fiber of sense；The optical signal that optical splitter is returned according to light multiplexing signal is received, including plated film tail optical fiber to monitoring optical signal
Reflected light signal；The reflected light signal of plated film tail optical fiber is parsed, obtaining the environment residing for optical splitter according to analysis result believes
Breath.By plated film tail optical fiber realize it is passive under the conditions of effective monitoring to optical splitter environmental change amount, compensate for existing electricity monitoring
Technology cannot carry out passive optical splitters the deficiency of environmental monitoring.
Description of the drawings
Fig. 1 is the method flow diagram of optical splitter environmental monitoring of the present invention；
Fig. 2 is the structural schematic diagram of the method plated film tail optical fiber of optical splitter environmental monitoring of the present invention；
Fig. 3 is the structural schematic diagram of the device of optical splitter environmental monitoring of the present invention；
Fig. 4 is the structural schematic diagram of the one concrete application example of device of optical splitter environmental monitoring of the present invention.
Reference sign：
S- plated film tail optical fibers, S1- coverings, S2- fibre cores, S3- tail ends.
Specific implementation mode
To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool
Body embodiment is described in detail.
Existing electricity monitoring technology effectively can carry out environmental monitoring, but these traditional electro-temperatures etc. to communications equipment room
Sensor is not suitable for passive monitoring environment.The method of the optical splitter environmental monitoring of the embodiment of the present invention, overcomes the prior art
Present in it is insufficient, solve in passive optical network to the real time on-line monitoring of optical splitter environment.
As shown in Figure 1, the method for the optical splitter environmental monitoring of the embodiment of the present invention, is applied to optical line terminal, the side
Method includes：
Step 11, the monitoring optical signal being generated in advance and the optical signal of upper layer network information are subjected to multiplexing process, generated
Light multiplexing signal, wherein the monitoring optical signal is different from the wavelength of optical signal of upper layer network information；
Step 12, the light multiplexing signal is sent to the one or more optical splitters being connect with the optical line terminal,
After so that the optical splitter is divided the light multiplexing signal, be sent to the optical network unit being connect with the optical splitter and/
Or plated film tail optical fiber, wherein the plated film tail optical fiber is to be previously connected at least one optical splitter, is quick to default environmental factor
The optical fiber of sense；
Step 13, the optical signal that the optical splitter is returned according to the light multiplexing signal is received, wherein the optical splitter returns
The optical signal returned includes reflected light signal of the plated film tail optical fiber to the monitoring optical signal；
Step 14, the reflected light signal is obtained in the optical signal that the optical splitter returns, and the reflected light is believed
It number is parsed, the environmental information residing for the optical splitter is obtained according to analysis result.
The method of the optical splitter environmental monitoring of the embodiment of the present invention, by obtaining the plated film tail optical fiber being connect with optical splitter to prison
The reflected light signal of optical signal is controlled, and reflected light signal is parsed, optical splitter institute can be accurately obtained according to analysis result
The environmental information at place.Realize it is passive under the conditions of effective monitoring to optical splitter environmental change amount, compensate for existing electricity monitoring skill
Art cannot carry out passive optical splitters the deficiency of environmental monitoring.
Wherein, the wave-length coverage of the optical signal of upper layer network information is generally 1310nm-1550nm, to be different from upper wire
1560nm-1620nm can be used in the wavelength of the optical signal of network information, the monitoring optical signal of the embodiment of the present invention.
Wherein, optical line terminal may be connected with multiple level-one optical splitters or secondary light-splitting device, and optical splitter can be used 1 ×
32,1 × 64 equal branches.In above-mentioned steps 12, recovery is signaled in level-one optical splitter or secondary light-splitting device, Mei Gefen
The branch of light device gets certain light energy, and is transmitted in optical network unit ONU or plated film tail optical fiber.
In specific embodiments of the present invention, the step of above-mentioned steps 14, may include：
Step 141, the optical signal returned to the optical splitter carries out demultiplexing processing, and institute is obtained in the optical signal after demultiplexing
State reflected light signal；
Step 142, the interference fringe of the reflected light signal is parsed, and obtains the preset attribute letter of the interference fringe
Breath；
Step 143, the environmental information residing for optical splitter described in the preset attribute acquisition of information.
At this point, due to optical signal that optical splitter returns include optical network unit to the response optical signal of upper layer network information and
Plated film tail optical fiber can be such that response light believes the reflected light signal for monitoring optical signal after being demultiplexed to the optical signal that optical splitter returns
It number is effectively separated with reflected light signal, is analyzed with obtaining reflected light signal, ensure that effective progress of environmental analysis.
And by parsing the interference fringe of reflected light signal and the attribute information of interference fringe, the ring residing for optical splitter can be accurately obtained
Border information, improves accuracy.
Wherein, the progress of parsing operation, the step of above-mentioned steps 142, may include for convenience：
Step 1421, the reflected light signal is amplified, institute is parsed according to the amplified reflected light signal
The interference fringe of reflected light signal is stated, and obtains the preset attribute information of the interference fringe.
At this point, parsing interference fringe, side by being amplified to reflected light signal, and according to amplified reflected light signal
Parsing operation progress, and improve the accuracy of operation.
Further, the step of above-mentioned steps 143 may include：
Step 1431, corresponding with the default environmental factor according to the preset attribute information and the preset attribute information
Relation formula, obtain the corresponding value of the default environmental factor.
At this point, by the preset attribute information relation formula corresponding with default environmental factor of interference fringe, can accurately obtain
The corresponding value of default environmental factor is taken, mode is simple and effective, improves treatment effeciency, and accuracy is high.
Specifically, the plated film tail optical fiber is coated in tail end to presetting the sensitive film of environmental factor, the default environment because
Element includes temperature or humidity；The preset attribute information includes the trough wavelength of the interference fringe；The preset attribute information
Relation formula corresponding with the default environmental factor is：
λmin=2L (1+a Δ Z) (n+b Δ Z)/m
Wherein, λminFor the wavelength of the interference fringe, L is the thickness of the film, and a is the thermal expansion system of the film
Number, b are the thermo-optical coeffecient of the film, and n is the refractive index of the film, and Δ Z is the variable quantity of the default environmental factor, m
For the integer more than or equal to 1.
For example, plated film tail optical fiber is coated with thermally sensitive film in tail end, i.e., default environmental factor is temperature, then pass through by
The wavelength X of interference fringemin, the thickness L of film, coefficient of thermal expansion a, thermo-optical coeffecient b, refractive index n and the numerical value m of film are brought into
Following formula：
λmin=2L (1+a Δ T) (n+b Δ T)/m
The variation delta T of environment temperature can accurately be obtained.
Specifically, as shown in Fig. 2, plated film tail optical fiber S may include that a wire body and tail end S3, wire body may include covering S1 and wrapped
Layer S1 is wrapped in interior fibre core S2, and tail end S3 is coated with the film that thickness is L.The length of plated film tail optical fiber can be 1 meter or so, with light splitting
After device connection, it is positioned over beside optical splitter.Wherein, monitoring optical signal enters in plated film tail optical fiber, can be at the both ends of film 1 and 2
Generate reflection.Here film is equivalent to F-P (Fa Poli-pool sieve) chamber that a length is L, and default category can be obtained by F-P cavity principle
Property information relation formula corresponding with default environmental factor, and then obtain the default corresponding value of environmental factor.
Wherein, SU-8 can be used to measure the environment temperature of optical splitter in the material of plated film tail optical fiber tail end film, can also be used
Cellulose acetate-butyrate material measures the ambient humidity of optical splitter, certainly, other materials sensitive to environmental factor can also be used
Material, differ a citing herein.
The plated film tail optical fiber of the embodiment of the present invention by change Coating Materials realize varying environment parameter monitoring respectively or
It monitors simultaneously, expands application scenarios, improve the flexibility of monitoring, be convenient to use.
For example, the plated film that two tail ends are coated with SU-8 and cellulose acetate-butyrate respectively can simultaneously be connected in an optical splitter
Tail optical fiber monitors while realizing the temperature and humidity to the optical splitter local environment.
Wherein, in order to cost-effective, for multiple optical splitters positioned at identical longitude and latitude, can only to one of them or two
Optical splitter be monitored, without being all monitored to the identical all optical splitters of physical location, effectively save resource, carry
High resource utilization.
In specific embodiments of the present invention, the step of above-mentioned steps 1431 after can also include：
Step 15, the corresponding value of the default environmental factor is reported as the upper layer webmaster, makes the upper layer webmaster pair
The corresponding value of the default environmental factor is shown.
At this point, upper layer webmaster (such as webmaster computer) is sent to by the corresponding value of default environmental factor that will be monitored,
And user is shown to by upper layer webmaster, it enables users to be visually known the environment residing for current optical splitter, facilitates user
Use, and centralized management is realized by upper layer webmaster, improves system application performance.
Specifically, upper layer webmaster can show the environmental informations such as temperature, humidity by modes such as figure, data, sound, and
Corresponding alarm is made according to the bound of the environmental factors such as temperature, humidity, to notify maintenance personnel to safeguard in time.
In specific embodiments of the present invention, can also include after above-mentioned steps 141：
Step 16, the reflected light signal and the monitoring optical signal are subjected to channel separation.
At this point, by the way that reflected light signal and monitoring optical signal are carried out channel separation, reflected light signal and monitoring are avoided
Interference between optical signal ensure that monitoring optical signal is transmitted to optical splitter and is smoothed out to reflected light signal parsing.
Specific embodiments of the present invention are illustrated below below.
The method of the optical splitter environmental monitoring of the embodiment of the present invention is applied to optical line terminal, will be generated in advance first
Monitoring optical signal and the optical signal of upper layer network information are multiplexed, and light multiplexing signal, the wherein light of upper layer network information are generated
1560nm-1620nm can be used in the general 1310nm-1550nm of signal wavelength, the wavelength for monitoring optical signal；Then light multiplexing is believed
Number be sent to the multiple optical splitters being connect with optical line terminal, after so that optical splitter is divided light multiplexing signal, be sent to
The tail end of the optical network unit ONU or plated film tail optical fiber of optical splitter connection, wherein plated film tail optical fiber is coated with to default environmental factor (such as temperature
Degree) sensitive film, and be previously connected at least one optical splitter；Receive the light that optical splitter is returned according to light multiplexing signal
After signal, the optical signal that optical splitter returns is carried out to demultiplex processing, and plated film tail optical fiber is obtained to prison in the optical signal after demultiplexing
Control the reflected light signal of optical signal；After reflected light signal and monitoring optical signal are carried out channel separation, reflected light signal is carried out
Amplification, the interference fringe of reflected light signal is parsed according to amplified reflected light signal, and obtain the default category of interference fringe
Property information (such as wavelength)；Bring preset attribute information into preset attribute information relation formula corresponding with default environmental factor again,
Such as
λmin=2L (1+a Δ Z) (n+b Δ Z)/m
It obtains and presets the corresponding value of environmental factor, wherein λminFor the wavelength of the interference fringe, L is the thickness of the film
Degree, a are the coefficient of thermal expansion of the film, and b is the thermo-optical coeffecient of the film, and n is the refractive index of the film, and Δ Z is institute
The variable quantity of default environmental factor is stated, m is the integer more than or equal to 1.Finally the corresponding value of default environmental factor is reported to
Upper layer webmaster (such as webmaster computer) makes upper layer webmaster that default environmental factor is passed through the modes such as picture, data or sound and shows
To user.
The method of the optical splitter environmental monitoring of the embodiment of the present invention, realize it is passive under the conditions of to optical splitter environmental change amount
Real-time online accurately and rapidly monitors, and environmental monitoring cannot be carried out not to passive optical splitters by compensating for existing electric monitoring technology
Foot.
The method of the optical splitter environmental monitoring of the embodiment of the present invention can be realized by changing the Coating Materials of plated film tail optical fiber
The monitoring respectively of varying environment parameter monitors simultaneously, expands application scenarios.
As shown in figure 3, the embodiments of the present invention also provide a kind of device of optical splitter environmental monitoring, it is applied to optical link
Terminal, described device include：
Multiplexing module, for carrying out the optical signal of the monitoring optical signal being generated in advance and upper layer network information at multiplexing
Reason generates light multiplexing signal, wherein the monitoring optical signal is different from the wavelength of optical signal of upper layer network information；
Sending module, for the light multiplexing signal to be sent to the one or more being connect with the optical line terminal point
Light device after so that the optical splitter is divided the light multiplexing signal, is sent to the optical-fiber network list being connect with the optical splitter
Member and/or plated film tail optical fiber, wherein the plated film tail optical fiber be previously connected at least one optical splitter, to default environment because
Plain sensitive optical fiber；
Receiving module, the optical signal returned according to the light multiplexing signal for receiving the optical splitter, wherein described point
The optical signal that light device returns includes reflected light signal of the plated film tail optical fiber to the monitoring optical signal；
Parsing module, for obtaining the reflected light signal in the optical signal that the optical splitter returns, and to described anti-
It penetrates optical signal to be parsed, the environmental information residing for the optical splitter is obtained according to analysis result.
The device of the optical splitter environmental monitoring of the embodiment of the present invention, by obtaining the plated film tail optical fiber being connect with optical splitter to prison
The reflected light signal of optical signal is controlled, and reflected light signal is parsed, optical splitter institute can be accurately obtained according to analysis result
The environmental information at place.Realize it is passive under the conditions of effective monitoring to optical splitter environmental change amount, compensate for existing electricity monitoring skill
Art cannot carry out passive optical splitters the deficiency of environmental monitoring.
In specific embodiments of the present invention, the parsing module may include：
Module is demultiplexed, the optical signal for being returned to the optical splitter carries out demultiplexing processing, in the optical signal after demultiplexing
Obtain the reflected light signal；
First analyzing sub-module, the interference fringe for parsing the reflected light signal, and obtain the interference fringe
Preset attribute information；
Acquisition module, for the environmental information residing for optical splitter described in the preset attribute acquisition of information.
At this point, due to optical signal that optical splitter returns include optical network unit to the response optical signal of upper layer network information and
Plated film tail optical fiber can be such that response light believes the reflected light signal for monitoring optical signal after being demultiplexed to the optical signal that optical splitter returns
It number is effectively separated with reflected light signal, is analyzed with obtaining reflected light signal, ensure that effective progress of environmental analysis.
And by parsing the interference fringe of reflected light signal and the attribute information of interference fringe, the ring residing for optical splitter can be accurately obtained
Border information, improves accuracy.
Wherein, the progress of parsing operation, first analyzing sub-module may include for convenience：
Second analyzing sub-module is believed for being amplified to the reflected light signal according to the amplified reflected light
Number the interference fringe of the reflected light signal is parsed, and obtains the preset attribute information of the interference fringe.
At this point, parsing interference fringe, side by being amplified to reflected light signal, and according to amplified reflected light signal
Parsing operation progress, and improve the accuracy of operation.
Further, the acquisition module may include：
Acquisition submodule, for according to the preset attribute information and the preset attribute information and the default environment because
The corresponding relation formula of element obtains the corresponding value of the default environmental factor.
At this point, by the preset attribute information relation formula corresponding with default environmental factor of interference fringe, can accurately obtain
The corresponding value of default environmental factor is taken, mode is simple and effective, improves treatment effeciency, and accuracy is high.
Specifically, the plated film tail optical fiber is coated in tail end to presetting the sensitive film of environmental factor, the default environment because
Element includes temperature or humidity；The preset attribute information includes the trough wavelength of the interference fringe；The preset attribute information
Relation formula corresponding with the default environmental factor is：
λmin=2L (1+a Δ Z) (n+b Δ Z)/m
Wherein, λminFor the wavelength of the interference fringe, L is the thickness of the film, and a is the thermal expansion system of the film
Number, b are the thermo-optical coeffecient of the film, and n is the refractive index of the film, and Δ Z is the variable quantity of the default environmental factor, m
For the integer more than or equal to 1.
In specific embodiments of the present invention, described device can also include：
Reporting module, for reporting the corresponding value of the default environmental factor for the upper layer webmaster, make the upper layer
Webmaster shows the corresponding value of the default environmental factor.
At this point, upper layer webmaster (such as webmaster computer) is sent to by the corresponding value of default environmental factor that will be monitored,
And user is shown to by upper layer webmaster, it enables users to be visually known the environment residing for current optical splitter, facilitates user
Use, and centralized management is realized by upper layer webmaster, improves system application performance.
Wherein, described device can also include：
Separation module, for the reflected light signal and the monitoring optical signal to be carried out channel separation.
At this point, by the way that reflected light signal and monitoring optical signal are carried out channel separation, reflected light signal and monitoring are avoided
Interference between optical signal ensure that monitoring optical signal is transmitted to optical splitter and is smoothed out to reflected light signal parsing.
Specifically, as shown in figure 4, existing optical line terminal OLT generally comprises OLT main control units and OLT signal light lists
Member, the device of the optical splitter environmental monitoring of the embodiment of the present invention can increase laser, circulator, wave on the basis of existing OLT
Division multiplexer, spectroscopy unit and data processing unit constitute novel OLT to realize the work(of the device of the embodiment of the present invention
Energy.Wherein wavelength division multiplexer connects optical splitter, and it is the integer more than 1, the branch of optical splitter that optical splitter, which uses the branch of 1 × N, N,
The plated film tail optical fiber S of a pair of default environmental factor sensitivity of connection and multiple optical network unit ONUs.
Wherein, laser is a wideband light source, can launch the light of a wave-length coverage section.The laser of the embodiment of the present invention
Device is used for monitoring of emission optical signal.In order to distinguish existing upper layer network information optical signal downstream wavelength 1550nm and upgoing wave
Long 1310nm, it is preferred that the wave-length coverage of the monitoring optical signal of the embodiment of the present invention is 1560nm-1620nm.
One end of circulator is connected with laser, and one end is connected with wavelength division multiplexer, one end also with spectroscopy unit phase
Even.Circulator is transmitted the monitoring optical signal that laser is sent out by first passage for realizing the function of above-mentioned separation module
To wavelength division multiplexer, optical splitter is transmitted to spectrum analysis by the reflected light signal that wavelength division multiplexer returns by second channel
Unit realizes the channel separation of monitoring optical signal and reflected light signal.
Wavelength division multiplexer is connect with circulator, OLT signals light unit and optical splitter respectively.OLT signal light units are for producing
The optical signal of raw upper layer network information.Wavelength division multiplexer is also used for for realizing above-mentioned Multiplexing module and the function of demultiplexing module
Realize the function of above-mentioned sending module and receiving module.Wavelength division multiplexer is by the optical signal of upper layer network information and monitors optical signal
It is sent to optical splitter after carrying out multiplexing process, or receives the optical signal of optical splitter return and carries out after demultiplexing processing, by reflected light
Signal is transmitted to circulator, is transmitted to spectroscopy unit by circulator, and by optical network unit to upper layer network information
Response optical signal is transmitted to OLT signal light units.
Wherein, plated film tail optical fiber is connected at least one optical splitter being connect with wavelength division multiplexer.Plated film tail optical fiber tail end plates
There is the film sensitive to environmental factors such as temperature or humidity.SU-8 or cellulose acetate-butyrate etc. can be used in the material of film.
Spectroscopy unit is connect with circulator and data processing unit respectively, for realizing above-mentioned first analyzing sub-module
Function.A distribution-adjustable light amplifier built in spectroscopy unit for being amplified to reflected light signal, and parses reflection
The interference fringe of optical signal obtains the preset attribute information (such as wavelength) of interference fringe.The technology acuracy of spectroscopy unit can
It is less than 0.02nm for wavelength resolution.
Data processing unit is connect with spectroscopy unit and OLT main control units respectively, for realizing above-mentioned acquisition module
Function.Data processing unit can pass through the default of the interference fringe of acquisition for handling interference fringe and environmental parameter variable
Attribute information parses the variation of environmental parameter such as temperature, humidity etc., and can be online by OLT main control units and transmission network management
Offer webmaster computer.
Webmaster computer can show the environmental informations such as temperature, humidity by modes such as figure, data, sound, and according to
The bound of the environmental factors such as temperature, humidity makes corresponding alarm, to notify maintenance personnel to safeguard in time.
Wherein, between spectroscopy unit, data processing unit and OLT main control units using electrical connection, other units it
Between be optical fiber connection.
Preferably, above-mentioned laser, circulator, wavelength division multiplexer, spectroscopy unit and data processing unit can be whole
Synthesis plug type veneer is installed in pluggable OLT slots, i.e., is built in above-mentioned newly-increased unit whole in existing OLT device
Novel OLT equipment is closed out, shares transmission network pipe network and webmaster computer with existing OLT device.It is easily achieved to each functional unit
Monitoring and monitoring to optical splitter environment, and need not individually build monitoring safeguard optical splitter environmental monitoring installation network and
Webmaster solves the difficulty of deployment, reduces cost.
The device of the optical splitter environmental monitoring of the embodiment of the present invention can be used above-mentioned Novel OLT equipment and realize.Laser first
Device launches monitoring optical signal to circulator；Circulator is transmitted to wavelength division multiplexer by first passage by optical signal is monitored；Wave
The optical signal for monitoring the upper layer network information that optical signal is sent out with OLT signal light units is carried out multiplexing process by division multiplexer, raw
At light multiplexing signal and send optical splitter to；Optical splitter sends ONU and plated film tail optical fiber to after being divided light multiplexing signal；Wave
Division multiplexer receives the optical signal that optical splitter returns and carries out after demultiplexing processing, by plated film tail optical fiber to the reflected light of monitoring optical signal
Signal is transmitted to circulator, and optical network unit is transmitted to OLT signal light units to the response optical signal of upper layer network information；
Circulator sends reflected light signal to spectroscopy unit by second channel；Spectroscopy unit carries out reflected light signal
After amplification, parses the preset attribute information (such as wavelength) of interference fringe and interference fringe and be transmitted to data processing unit；Number
The value of environmental factor (such as temperature or humidity) is preset according to the preset attribute acquisition of information of interference fringe according to processing unit, and is passed through
Webmaster computer is offered in OLT main control units and transmission network management on the net；Webmaster computer is finally in a manner of figure, data or sound etc.
Environmental information is shown.
The device of the optical splitter environmental monitoring of the embodiment of the present invention, realize it is passive under the conditions of to optical splitter environmental change amount
Real-time online accurately and rapidly monitors, and environmental monitoring cannot be carried out not to passive optical splitters by compensating for existing electric monitoring technology
Foot.
The device of the optical splitter environmental monitoring of the embodiment of the present invention can be realized by changing the Coating Materials of plated film tail optical fiber
The monitoring respectively of varying environment parameter monitors simultaneously, expands application scenarios.
The device of the optical splitter environmental monitoring of the embodiment of the present invention can be used in built-in existing net OLT device, share transmission network
Pipe network and webmaster computer method, make the program be easily achieved, and need not individually build monitoring and safeguard that optical splitter environment is supervised
The network and webmaster for controlling device, solve the difficulty of deployment, reduce cost.
It should be noted that the device of the optical splitter environmental monitoring is corresponding with the above-mentioned method of optical splitter environmental monitoring
Device, all realization methods can also reach same suitable for the embodiment of the device wherein in above method embodiment
Technique effect.
Since the device of the optical splitter environmental monitoring of the embodiment of the present invention is applied to optical line terminal, the present invention is real
It applies example and additionally provides a kind of optical line terminal, including：The device of optical splitter environmental monitoring as described in above-described embodiment.Its
In, the realization embodiment of the device of above-mentioned optical splitter environmental monitoring suitable for the embodiment of the optical line terminal,
Identical technique effect can be reached.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, it can also make several improvements and retouch, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (14)
1. a kind of method of optical splitter environmental monitoring is applied to optical line terminal, which is characterized in that the method includes：
The monitoring optical signal being generated in advance and the optical signal of upper layer network information are subjected to multiplexing process, generate light multiplexing signal,
Wherein, the monitoring optical signal is different from the wavelength of optical signal of upper layer network information；
The light multiplexing signal is sent to the one or more optical splitters being connect with the optical line terminal, makes the optical splitter
After being divided to the light multiplexing signal, it is sent to the optical network unit being connect with the optical splitter and plated film tail optical fiber, wherein
The plated film tail optical fiber is to be previously connected at least one optical splitter, to presetting the sensitive optical fiber of environmental factor；
The optical signal that the optical splitter is returned according to the light multiplexing signal is received, wherein the optical signal packet that the optical splitter returns
Include reflected light signal of the plated film tail optical fiber to the monitoring optical signal；
The reflected light signal is obtained in the optical signal that the optical splitter returns, and the reflected light signal is parsed,
The environmental information residing for the optical splitter is obtained according to analysis result.
2. according to the method described in claim 1, it is characterized in that, described obtain institute in the optical signal that the optical splitter returns
Reflected light signal is stated, and the reflected light signal is parsed, the environment residing for the optical splitter is obtained according to analysis result
Information, including：
The optical signal returned to the optical splitter carries out demultiplexing processing, and the reflected light letter is obtained in the optical signal after demultiplexing
Number；
The interference fringe of the reflected light signal is parsed, and obtains the preset attribute information of the interference fringe；
According to the environmental information residing for optical splitter described in the preset attribute acquisition of information.
3. according to the method described in claim 2, it is characterized in that, the interference fringe of the parsing reflected light signal, and
The preset attribute information of the interference fringe is obtained, including：
The reflected light signal is amplified, the reflected light signal is parsed according to the amplified reflected light signal
Interference fringe, and obtain the preset attribute information of the interference fringe.
4. according to the method described in claim 2, it is characterized in that, described be divided according to described in the preset attribute acquisition of information
Environmental information residing for device, including：
According to the preset attribute information and the preset attribute information relation formula corresponding with the default environmental factor, obtain
Take the corresponding value of the default environmental factor.
5. according to the method described in claim 4, it is characterized in that, the plated film tail optical fiber is coated in tail end to presetting environmental factor
Sensitive film, the default environmental factor includes temperature or humidity；The preset attribute information includes the interference fringe
Trough wavelength；Preset attribute information relation formula corresponding with the default environmental factor is：
λmin=2L (1+a Δ Z) (n+b Δ Z)/m
Wherein, λminFor the wavelength of the interference fringe, L is the thickness of the film, and a is the coefficient of thermal expansion of the film, b
For the thermo-optical coeffecient of the film, n is the refractive index of the film, and Δ Z is the variable quantity of the default environmental factor, and m is big
In or equal to 1 integer.
6. according to the method described in claim 4, it is characterized in that, described according to the preset attribute information and the default category
Property information relation formula corresponding with the default environmental factor, after obtaining the corresponding value of the default environmental factor, also wrap
It includes：
The corresponding value of the default environmental factor is reported as the upper layer webmaster, makes the upper layer webmaster to the default environment
The corresponding value of factor is shown.
7. according to the method described in claim 2, it is characterized in that, the optical signal returned to the optical splitter demultiplexes
It handles, after the reflected light signal is obtained in the optical signal after demultiplexing, further includes：
The reflected light signal and the monitoring optical signal are subjected to channel separation.
8. a kind of device of optical splitter environmental monitoring, it is applied to optical line terminal, which is characterized in that described device includes：
The optical signal of Multiplexing module, monitoring optical signal and upper layer network information for that will be generated in advance carries out multiplexing process, raw
At light multiplexing signal, wherein the monitoring optical signal is different from the wavelength of optical signal of upper layer network information；
Sending module, for the light multiplexing signal to be sent to the one or more light splitting being connect with the optical line terminal
Device is sent to the optical network unit being connect with the optical splitter after so that the optical splitter is divided the light multiplexing signal
With plated film tail optical fiber, wherein the plated film tail optical fiber is to be previously connected at least one optical splitter, is quick to default environmental factor
The optical fiber of sense；
Receiving module, the optical signal returned according to the light multiplexing signal for receiving the optical splitter, wherein the optical splitter
The optical signal of return includes reflected light signal of the plated film tail optical fiber to the monitoring optical signal；
Parsing module, for obtaining the reflected light signal in the optical signal that the optical splitter returns, and to the reflected light
Signal is parsed, and the environmental information residing for the optical splitter is obtained according to analysis result.
9. device according to claim 8, which is characterized in that the parsing module includes：
Module is demultiplexed, the optical signal for being returned to the optical splitter carries out demultiplexing processing, is obtained in the optical signal after demultiplexing
The reflected light signal；
First analyzing sub-module, the interference fringe for parsing the reflected light signal, and obtain the default of the interference fringe
Attribute information；
Acquisition module, for the environmental information residing for optical splitter described in the preset attribute acquisition of information.
10. device according to claim 9, which is characterized in that first analyzing sub-module includes：
Second analyzing sub-module, for being amplified to the reflected light signal, according to the amplified reflected light signal solution
The interference fringe of the reflected light signal is precipitated, and obtains the preset attribute information of the interference fringe.
11. device according to claim 9, which is characterized in that the acquisition module includes：
Acquisition submodule, for according to the preset attribute information and the preset attribute information and the default environmental factor pair
The relation formula answered obtains the corresponding value of the default environmental factor.
12. according to the devices described in claim 11, which is characterized in that described device further includes：
Reporting module, for reporting the corresponding value of the default environmental factor for the upper layer webmaster, make the upper layer webmaster
The corresponding value of the default environmental factor is shown.
13. device according to claim 9, which is characterized in that described device further includes：
Separation module, for the reflected light signal and the monitoring optical signal to be carried out channel separation.
14. a kind of optical line terminal, which is characterized in that including：As claim 8-13 any one of them optical splitter environment is supervised
The device of control.
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