CN103002359A - Optical splitter port identification device and method thereof and optical splitter temperature detecting device and method thereof - Google Patents
Optical splitter port identification device and method thereof and optical splitter temperature detecting device and method thereof Download PDFInfo
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- CN103002359A CN103002359A CN 201210324655 CN201210324655A CN103002359A CN 103002359 A CN103002359 A CN 103002359A CN 201210324655 CN201210324655 CN 201210324655 CN 201210324655 A CN201210324655 A CN 201210324655A CN 103002359 A CN103002359 A CN 103002359A
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Abstract
The invention embodiment discloses an optical splitter port identification device and a method thereof and an optical splitter temperature detecting device and a method thereof. The optical splitter port identification device comprises a grating array, an isothermal packaging box and an identification module. The grating array is positioned in the isothermal packaging box and used to identify wavelength of the light waves which correspond to the light waves formed by the reflection of each grating of the grating array under the reference temperature to each optical splitter port of an optical slitter; the isothermal packaging box is used to make the distribution of temperature in the isothermal packaging box uniform when environmental temperature changes; and the identification module is used to respectively obtain the wavelength of the current reflection light of each grating in the grating array and also the current temperature value. According to the drift relationship of the positive correlated reflection wavelength and temperature of each grating, the corresponding reference reflection wavelength of each grating is obtained; and according to the corresponding relationship between the corresponding reference reflection wavelength of each grating and corresponding optical splitter port identification of the optical splitter, each optical splitter port of the optical splitter is identified. No expensive temperature compensation structure is needed, and extra connection loss and packaging costs produced during the connection of the optical splitter and the grating are reduced.
Description
Technical field
The embodiment of the invention relates to communication technical field, relates in particular to a kind of optical splitter port identification device and method, optical splitter temperature checking method and device.
Background technology
Along with the fiber optic network scale enlarges rapidly, passive optical network technique becomes the focus of Technology of Light Access Network gradually.In order to ensure communication, improve the availability factor of fiber optic network, in time grasp on the one hand the operation conditions of optical fiber link, in time find degradation trend, prevent trouble before it happens; On the other hand, when breakpoint appears in optical fiber link, can respond fast, accurately the location is shortened the searching obstacle and is lasted.
Fig. 1 is the structural representation of the optical splitter of prior art, splitter at optical splitter is terminal, Fiber Bragg Grating FBG (the Fiber Bragg Grating that connects respectively the different characteristic wavelength by optical connector, FBG), as the adjustable optical time domain reflectometer of wavelength (Optical Time Domain Reflectometer, OTDR) send certain wavelength detection light time, by the FBG of corresponding wavelength branch road reflection or projection, the light that returns is surveyed and is identified by OTDR, thereby realizes that far-end is to sign and the monitoring of passive fiber link.
Because FBG easily is acted upon by temperature changes, when ambient temperature changed, adjacent FBG wavelength shown in Figure 1 overlapped easily, can't the overlapping branch road of identification FBG wavelength, thereby so that the function of FBG forfeiture sign passive fiber link, therefore, need to carry out temperature-compensating to FBG, for example negative thermal expansion material encapsulation, FBG is remained under the fixing temperature to work, but the long term device reliability ratio is relatively poor, has also additionally increased cost.
As shown in Figure 1, when FBG is connected to each branch road of optical splitter optical branching device, need to be connected with each link fiber by optical connector, increase extra junction loss.
Summary of the invention
The embodiment of the invention provides a kind of optical splitter port identification device and method, optical splitter temperature checking method and device, need to carry out temperature-compensating to FBG in order to what solve that existing optical splitter exists, increase extra power consumption and be connected with cost and need to be connected with each link fiber by optical connector, increased the problem of extra junction loss.
First aspect, the embodiment of the invention provide a kind of optical splitter port identification device, comprising: optical branching device, grating array, band fibre, isothermal encapsulation box and identification module;
The fine end of described band is connected with described optical branching device, and the fine other end of described band passes described grating array;
Described grating array is arranged in described isothermal encapsulation box;
Described optical branching device is used for the light wave of input is divided into the output of two-way light wave at least;
Described grating array comprises two gratings at least, and the quantity of the grating that comprises in the described grating array is identical with the way of the light wave of described optical branching device output;
Described grating array, after being used for each road light wave with described optical branching device output and carrying out respectively filtering and process, the light wave of reflection corresponding wavelength, the wavelength of the corresponding light wave that each grating reflects under fiducial temperature in the described grating array is in order to identify each minute optical port of described optical splitter;
Described isothermal encapsulation box is used for when variation of ambient temperature, so that the uniformity of temperature profile in the described isothermal encapsulation box;
Identification module is used for obtaining respectively each grating of grating array when the wavelength of the corresponding light wave of front-reflection, obtains current temperature value; According to the reflection wavelength of described each grating and the positively related drift relation of temperature, and the current temperature value of obtaining and described each grating obtain the benchmark reflection wavelength that described each grating pair is answered when the wavelength of the corresponding light wave of front-reflection; Corresponding relation between the sign of corresponding with described optical splitter minute optical port of the benchmark reflection wavelength of answering according to described each grating pair is identified each road of described optical splitter and is divided optical port.
In the possible implementation of the first, described grating array comprises bragg grating array, and described isothermal encapsulation box comprises metal isothermal encapsulation box.
Based on the possible implementation of the first, in the possible implementation of the second, described optical branching device is arranged in described isothermal encapsulation box, or separately encapsulation, and described identification module is integrated in the described isothermal encapsulation box, or separately encapsulation.
Second aspect, the embodiment of the invention provide a kind of optical splitter port identification method, comprising:
Obtain respectively each grating in the grating array when the wavelength of the corresponding light wave of front-reflection, obtain current temperature value;
According to the reflection wavelength of described each grating and the positively related drift relation of temperature, and the current temperature value of obtaining and described each grating obtain the benchmark reflection wavelength that described each grating pair is answered when the wavelength of the corresponding light wave of front-reflection;
Corresponding relation between the sign of corresponding with described optical splitter minute optical port of the benchmark reflection wavelength of answering according to described each grating pair is identified each road of described optical splitter and is divided optical port;
Described grating array is arranged in isothermal encapsulation box, when described isothermal is encapsulated in variation of ambient temperature, so that the uniformity of temperature profile in the described isothermal encapsulation box.
In the possible implementation of the first, the corresponding relation between the sign of corresponding with described optical splitter minute optical port of described benchmark reflection wavelength of answering according to described each grating pair is identified each road of described optical splitter and is divided before the optical port, comprising:
Described each grating wavelength to the corresponding light wave of each road light wave reflection of described optical branching device output under fiducial temperature is preset as the benchmark reflection wavelength that described each grating pair is answered;
The benchmark reflection wavelength that described each grating pair is answered is made as the sign that the correspondence of described optical splitter is divided optical port.
The third aspect, the embodiment of the invention provide a kind of optical splitter temperature checking method, comprising:
Obtain respectively each grating in the grating array when the corresponding wavelength of front-reflection;
According to the reflection wavelength of described each grating and the positively related drift relation of temperature, the benchmark reflection wavelength that described each grating is answered when the corresponding wavelength of front-reflection and default described each grating pair compares, and obtains the Current Temperatures of described optical splitter;
Described grating array is arranged in isothermal encapsulation box, when described isothermal is encapsulated in variation of ambient temperature, so that the uniformity of temperature profile in the described isothermal encapsulation box.
In the possible implementation of the first, reflection wavelength and the positively related drift relation of temperature according to described each grating, the benchmark reflection wavelength that described each grating is answered when the corresponding wavelength of front-reflection and default described each grating pair compares, obtain before the Current Temperatures of described optical splitter, comprising:
Described each grating wavelength to the corresponding light wave of each road light wave reflection of described optical branching device output under fiducial temperature is preset as the benchmark reflection wavelength that described each grating pair is answered.
Fourth aspect, the embodiment of the invention provide a kind of optical splitter temperature-detecting device, comprising:
Acquisition module is used for obtaining respectively each grating of grating array when the wavelength of the corresponding light wave of front-reflection;
Detection module, for the basis of each grating of grating array that obtains at described acquisition module when the wavelength of the corresponding light wave of front-reflection, reflection wavelength and the positively related drift relation of temperature according to described each grating, the benchmark reflection wavelength that described each grating is answered when the wavelength of the corresponding light wave of front-reflection and default described each grating pair compares, and obtains the Current Temperatures of described optical splitter;
Described grating array is arranged in isothermal encapsulation box, when described isothermal is encapsulated in variation of ambient temperature, so that the uniformity of temperature profile in the described isothermal encapsulation box.
In the possible implementation of the first, described device also comprises:
Module is set, and the wavelength that is used for the corresponding light wave of each road light wave reflection of will described each grating under fiducial temperature described optical branching device being exported is preset as the benchmark reflection wavelength that described each grating pair is answered.
The 5th aspect, the embodiment of the invention provide a kind of optical distribution network, comprising: above-mentioned optical splitter port identification device.
The 6th aspect, the embodiment of the invention provides a kind of optical fiber telecommunications system, at least comprise optical line terminal and optical network unit, described optical line terminal is connected by optical distribution network with optical network unit, and described optical distribution network comprises above-mentioned optical splitter port identification device and above-mentioned optical splitter temperature-detecting device.
The optical splitter of the embodiment of the invention is provided with grating array at the band fibre of minute optical port, by the benchmark reflection wavelength that each grating pair in the identification grating array is answered, can identify rapidly optical splitter each minute optical port, has improved recognition efficiency.
Simultaneously, the grating array of the optical splitter of the embodiment of the invention is arranged in isothermal encapsulation box, because the uniformity of temperature profile in the isothermal encapsulation box, the wavelength of the corresponding light wave that each road light wave of each the grating pair optical branching device output in the grating array reflects respectively, direction with temperature drift is identical with numerical value, can guarantee when ambient temperature changes, the wavelength of the light wave of the adjacent gratings reflection phenomenon that can not overlap, can solve the increase cost that existing grating needs the expensive temperature compensation means such as negative thermal expansion material encapsulation to exist, the problem of long-time stability variation, therefore, the optical splitter of present embodiment utilizes the grating array of cheaply isothermal encapsulation, can be low-cost, high efficiency realization narrow bandwidth, the high density spectrum resource at narrow interval is distributed.
Simultaneously, the grating array of the optical splitter of the embodiment of the invention is integrated on the band fibre, does not need to be connected with each link fiber device by optical connector, can lower junction loss.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do one to the accompanying drawing of required use in embodiment or the description of the Prior Art and introduce simply, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of the optical splitter of prior art;
The structural representation of the optical splitter port identification device that Fig. 2 provides for one embodiment of the invention;
Fig. 3 is the structural representation of a kind of specific implementation of optical splitter port identification device embodiment illustrated in fig. 2;
Fig. 4 is the structural representation of another specific implementation of optical splitter port identification device embodiment illustrated in fig. 2;
Fig. 5 is the structural representation of another specific implementation of optical splitter port identification device embodiment illustrated in fig. 2;
The schematic flow sheet of the optical splitter port identification method that Fig. 6 provides for another embodiment of the present invention;
The schematic flow sheet of the optical splitter temperature checking method that Fig. 7 provides for another embodiment of the present invention;
The structural representation of the optical splitter temperature-detecting device that Fig. 8 provides for another embodiment of the present invention;
The structural representation of the optical fiber telecommunications system that Fig. 9 provides for another embodiment of the present invention.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer, below in conjunction with the accompanying drawing in the embodiment of the invention, technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
Need to carry out temperature-compensating to FBG based on what existing optical splitter existed, increase extra cost, need to be connected with each link fiber by optical connector, increase the problem of extra junction loss.The embodiment of the invention provides a kind of optical splitter, when temperature Change, does not need FBG is carried out in the situation of temperature-compensating, and FBG also can work, and does not lose the function of sign passive fiber link.When FBG is connected to optical splitter, do not need optical connector, can reduce junction loss.
The structural representation of the optical splitter port identification device that Fig. 2 provides for one embodiment of the invention as shown in Figure 2, specifically comprises: optical branching device 21, grating array 22, band are fine 23, isothermal encapsulation box 24 and identification module 25;
One end of band fine 23 is connected with optical branching device 21, and the other end of band fine 23 passes grating array 22; Need to prove that in actual applications, the other end of band fine 23 passes grating array 22 and is connected with splitter.
Grating array 22, after being used for each road light wave with described optical branching device output and carrying out respectively filtering and process, the light wave of reflection corresponding wavelength;
Need to prove, in the present embodiment, can be with each grating in the grating array 22 under fiducial temperature, the wavelength of the corresponding light wave that each road light wave of described optical branching device output is reflected respectively is made as the benchmark reflection wavelength that each grating pair is answered, and the benchmark reflection wavelength that each grating pair is answered is made as the sign that the correspondence of described optical splitter is divided optical port;
Need to prove, because uniform distribution of temperature field in the isothermal encapsulation box, when ambient temperature changes, the wavelength of each optical grating reflection light wave is identical with numerical value with the direction of temperature drift in the grating array, can obtain by experiment wavelength and the positively related drift relation of temperature of each optical grating reflection light wave in the grating array with calculating.For example, it is 0.01nm/ ℃ that the positively related drift of the wavelength of Bragg grating reflecting light and temperature is closed, when being current environmental temperature than high 10 ℃ of fiducial temperature, Bragg grating is as the benchmark reflected wave of the wavelength ratio Bragg grating of the light wave of the front-reflection 0.01nm that grows up.Hence one can see that, and isothermal encapsulation box can guarantee when ambient temperature changes, the wavelength of the light wave of the adjacent gratings reflection phenomenon that can not overlap.
Need to prove that the said reference temperature is generally normal temperature, the temperature value of different regions normal temperature is different, typically refers to 20 ℃ for the normal temperature of CONTINENTAL AREA OF CHINA.
Need to prove that described grating array can adopt but be not limited to bragg grating array and realize, described isothermal encapsulation box can adopt but be not limited to the metallic packaging box to be realized.
Need to prove, in order to realize that the present invention identifies the purpose of optical splitter each minute optical port, at an optional execution mode of the present invention, identification module 25 can be integrated in the isothermal encapsulation box 24, specifically can be used for: obtain respectively each grating of grating array when the wavelength of the corresponding light wave of front-reflection, obtain current temperature value; According to the reflection wavelength of described each grating and the positively related drift relation of temperature, and the current temperature value of obtaining and described each grating obtain the benchmark reflection wavelength that described each grating pair is answered when the wavelength of the corresponding light wave of front-reflection; Corresponding relation between the sign of corresponding with described optical splitter minute optical port of the benchmark reflection wavelength of answering according to described each grating pair is identified each road of described optical splitter and is divided optical port.
Need to prove that above-mentioned identification module also can be an individual devices that is independent of isothermal encapsulation box, the present invention is not construed as limiting this.
Need to prove that the optical splitter of present embodiment can comprise two or more grating array, and each grating array comprises two gratings at least, each the grating number sum in each grating array is identical with the way of the light wave of the output of optical splitter.
Need to prove that the optical branching device of present embodiment can be encapsulated in the metallic packaging box with grating array.
The optical splitter of the embodiment of the invention is provided with grating array at the band fibre of minute optical port of optical branching device, by the benchmark reflection wavelength that each grating pair in the identification grating array is answered, can identify rapidly optical splitter each minute optical port, has improved recognition efficiency.
Simultaneously, the grating array of the optical splitter of the embodiment of the invention is arranged in isothermal encapsulation box, because the uniformity of temperature profile in the isothermal encapsulation box, the wavelength of the corresponding light wave that each road light wave of each the grating pair optical branching device output in the grating array reflects respectively, direction with temperature drift is identical with numerical value, can guarantee when ambient temperature changes, the wavelength of the light wave of the adjacent gratings reflection phenomenon that can not overlap, can solve the increase cost that existing grating needs the expensive temperature compensation means such as negative thermal expansion material encapsulation to exist, the problem of long-time stability variation, therefore, the optical splitter of present embodiment utilizes the grating array of cheaply isothermal encapsulation, can be low-cost, high efficiency realization narrow bandwidth, the high density spectrum resource at narrow interval is distributed.
Simultaneously, the grating array of the optical splitter of the embodiment of the invention is integrated on the band fibre, does not need to be connected with each link fiber device by optical connector, can lower junction loss.
Fig. 3 is the structural representation of a kind of specific implementation of optical splitter port identification device embodiment illustrated in fig. 2; As shown in Figure 3, specifically comprise: bragg grating array box, optical branching device, band fibre and splitter;
Wherein, the bragg grating array box is positioned on the band fibre of optical branching device and splitter centre, be with a fine end to be connected to optical branching device, the other end is connected with splitter by the bragg grating array box, the bragg grating array box comprises bragg grating array and metallic packaging box, also comprise identification module, wherein, identification module and bragg grating array are integrated in the metallic packaging box.
The optical branching device of present embodiment can be divided into the input light wave output of 8 road light waves, and accordingly, bragg grating array comprises 8 Bragg gratings, respectively 8 road light waves of optical branching device output is carried out the filtering processing, the light wave of reflection corresponding wavelength.
In an optional execution mode of the present invention, the bragg wavelength of supposing 8 Bragg grating reflections is: λ 1=1625nm, λ 2=1626nm, λ 3=1627nm, λ 4=1628nm, λ 5=1629nm, λ 6=1630nm, λ 7=1631nm, λ 8=1632nm; Because there are unique mapping relations in bragg grating array and this 1 * 8 optical branching device, and the different branched lines of the corresponding optical branching device of different Bragg grating.According to above-mentioned mapping relations, the wavelength of the corresponding light wave that each Bragg grating can be reflected under fiducial temperature is made as the sign of respective branches circuit (minute optical port), thereby can identify by identification module the wavelength of the corresponding light wave that each Bragg grating in the bragg grating array reflects respectively each road light wave of optical branching device output, can identify rapidly optical splitter each minute optical port, improve recognition efficiency.
In an optional execution mode of the present invention, bragg grating array is outside to be encapsulated with a metallic packaging box, has avoided each FBG to encapsulate separately, has saved packaging cost.
Because uniform distribution of temperature field in the metallic packaging box, when ambient temperature changes, the wavelength of the reflecting light of bragg grating array is identical with numerical value with the direction of temperature drift, experiment and calculating show, it is 0.01nm/ ℃ that the positively related drift of the wavelength of Bragg grating reflecting light and temperature is closed, when being current environmental temperature than high 10 ℃ of fiducial temperature, Bragg grating is as the benchmark reflected wave of the wavelength ratio Bragg grating of the light wave of the front-reflection 0.01nm that grows up, and the benchmark reflection wavelength of Bragg grating is the wavelength of the light wave that reflects under fiducial temperature of Bragg grating.
Suppose as Optical Distribution Network (Optical Distribution Network, when ODN) temperature of the bragg grating array in the network is than high 10 ℃ of fiducial temperature, the wavelength that 8 Bragg gratings in the bragg grating array of present embodiment are worked as the light wave of front-reflection is respectively: λ 1=1625.1nm, λ 2=1626.1nm, λ 3=1627.1nm, λ 4=1628.1nm, λ 5=1629.1nm, λ 6=1630.1nm, λ 7=1631.1nm, λ 8=1632.1nm.Need to prove that the said reference temperature is generally normal temperature, the temperature value of different regions normal temperature is different, typically refers to 20 ℃ for the normal temperature of CONTINENTAL AREA OF CHINA.
Hence one can see that, the optical splitter of present embodiment can be guaranteed when ambient temperature changes, the wavelength of the light wave of the adjacent gratings reflection phenomenon that can not overlap, can solve existing grating needs the problems such as the increase cost of negative thermal expansion material encapsulation equitemperature compensation arrangement existence, long-time stability variation, therefore, the optical splitter of present embodiment utilizes the grating array of cheaply isothermal encapsulation, gets final product low-cost, high efficiency realization narrow bandwidth, and the high density spectrum resource at narrow interval is distributed.
Fig. 4 is the structural representation of another specific implementation of optical splitter port identification device embodiment illustrated in fig. 2; As shown in Figure 4, specifically comprise: bragg grating array, optical branching device, band fibre and splitter;
Bragg grating array is produced on the band fibre, and bragg grating array and optical branching device and identification module be encapsulated in the same metallic packaging box, is with a fine end to be connected to optical branching device, and the other end passes bragg grating array and is connected with splitter.
The optical branching device of present embodiment can be divided into the input light wave output of 8 road light waves, and accordingly, bragg grating array comprises 8 Bragg gratings, respectively 8 road light waves of optical branching device output is carried out the filtering processing, the light wave of reflection corresponding wavelength.
In an optional execution mode of the present invention, the bragg wavelength of supposing 8 Bragg grating reflections is: λ 1=1640.0nm, λ 2=1640.5nm, λ 3=1641.0nm, λ 4=1641.5nm, λ 5=1642.0nm, λ 6=1642.5nm, λ 7=1643.0nm, λ 8=1643.5nm; Because there are unique mapping relations in bragg grating array and this 1 * 8 optical branching device, and the different branched lines of the corresponding optical branching device of different Bragg grating.According to above-mentioned mapping relations, the wavelength of the corresponding light wave that each Bragg grating can be reflected under fiducial temperature is made as the sign of respective branches circuit (minute optical port), thereby can identify by identification module the wavelength of the corresponding light wave that each Bragg grating in the bragg grating array reflects respectively each road light wave of optical branching device output, can identify rapidly optical splitter each minute optical port, improve recognition efficiency.
Bragg grating array and optical branching device share a metallic packaging box, have avoided each Bragg grating to encapsulate separately, have saved packaging cost.
Because uniform distribution of temperature field in the metallic packaging box, when ambient temperature changes, the wavelength of the reflecting light of bragg grating array is identical with numerical value with the direction of temperature drift, experiment and calculating show, it is 0.01nm/ ℃ that the positively related drift of the wavelength of Bragg grating reflecting light and temperature is closed, when being current environmental temperature than low 10 ℃ of fiducial temperature, Bragg grating is as the little 0.01nm of benchmark reflection wavelength of the wavelength ratio Bragg grating of the light wave of front-reflection, and the benchmark reflection wavelength of Bragg grating is the wavelength of the light wave that reflects under fiducial temperature of Bragg grating.
Suppose optical distribution network (Optical Distribution Network, the temperature of the bragg grating array ODN) is lower 10 ℃ than fiducial temperature, the wavelength that 8 Bragg gratings in the bragg grating array of present embodiment are worked as the light wave of front-reflection is respectively: λ 1=1639.9nm, λ 2=1640.4nm, λ 3=1640.9nm, λ 4=1641.4nm, λ 5=1641.9nm, λ 6=1642.4nm, λ 7=1642.9nm, λ 8=1643.4nm.
Hence one can see that, the optical splitter of present embodiment can be guaranteed when ambient temperature changes, the wavelength of the light wave of the adjacent gratings reflection phenomenon that can not overlap, the optical splitter of present embodiment utilizes the grating array of cheaply isothermal encapsulation, get final product low-cost, high efficiency realization narrow bandwidth, the high density spectrum resource at narrow interval is distributed.
Fig. 5 is the structural representation of another specific implementation of optical splitter port identification device embodiment illustrated in fig. 2; As shown in Figure 5, specifically comprise: optical branching device, at least two bragg grating array boxes, at least two bands are fine, at least two splitters;
Wherein, comprise a bragg grating array and a metallic packaging box in each bragg grating array box, also comprise identification module, bragg grating array and identification module can be integrated in the metallic packaging box;
Each bragg grating array box is positioned on the band fibre of optical branching device and splitter centre, is with a fine end to be connected to optical branching device, and the other end is connected with splitter by the bragg grating array box.
The optical branching device of present embodiment can be divided into 16 road light waves with the input light wave and output to two bragg grating array, accordingly, each bragg grating array comprises 8 Bragg gratings, respectively 8 road light waves of optical branching device output is carried out the filtering processing, the light wave of reflection corresponding wavelength.
In an optional execution mode of the present invention, suppose that the bragg wavelength of 16 Bragg grating reflections is: λ 1=1650.0nm, λ 2=1650.5nm, λ 3=1651.0nm ... λ 16=1657.5nm; Because there are unique mapping relations in bragg grating array and this 1 * 16 optical branching device, and the different branched lines of the corresponding optical branching device of different Bragg grating.According to above-mentioned mapping relations, can be with each Bragg grating under fiducial temperature, the wavelength of the corresponding light wave of reflection is made as the sign of respective branches circuit (minute optical port), thereby can identify by identification module the wavelength of the corresponding light wave that each Bragg grating in the bragg grating array reflects respectively each road light wave of optical branching device output, can identify rapidly optical splitter each minute optical port, improve recognition efficiency.
In an optional execution mode of the present invention, each bragg grating array is outside to be encapsulated with a metallic packaging box, has avoided the independent encapsulation of each Bragg grating, has saved packaging cost.
Because uniform distribution of temperature field in the metallic packaging box, when ambient temperature changes, the wavelength of the reflecting light of bragg grating array is identical with numerical value with the direction of temperature drift, experiment and calculating show, it is 0.01nm/ ℃ that the positively related drift of the wavelength of Bragg grating reflecting light and temperature is closed, when being current environmental temperature than high 10 ℃ of fiducial temperature, Bragg grating is as the benchmark reflected wave of the wavelength ratio Bragg grating of the light wave of the front-reflection 0.01nm that grows up, and the benchmark reflection wavelength of Bragg grating is the wavelength of the light wave that reflects under fiducial temperature of Bragg grating.
Suppose as Optical Distribution Network (Optical Distribution Network, when ODN) temperature of the bragg grating array in the network was than high 20 ℃ of fiducial temperature, 16 Bragg gratings in two bragg grating array of present embodiment were respectively when the wavelength of the light wave of front-reflection: λ 1=1650.2nm, λ 2=1650.7nm, λ 3=1651.2nm ... λ 16=1657.7nm.
Hence one can see that, the optical splitter of present embodiment can be guaranteed when ambient temperature changes, the wavelength of the light wave of the adjacent gratings reflection phenomenon that can not overlap, therefore, the optical splitter of present embodiment utilizes the grating array of cheaply isothermal encapsulation, get final product low-cost, high efficiency realization narrow bandwidth, the high density spectrum resource at narrow interval is distributed.
Need to prove, in above-described embodiment, the two ends of bragg grating array box are the fine structure of normal tape, can utilize the optical divider packaging technique of existing standard to encapsulate, not need existing optical divider packaging technique transformed and to realize that minute optical port has the making of the optical branching device of bragg grating array.
Because the band fibre at original optical branching device has added the bragg grating array box, when increasing identification function, the length of device does not increase.It is fine that the bragg grating array box is integrated into band, do not need extra optical connector, can reduce junction loss, connects the manual errors of bragg grating array box and optical branching device when having avoided site operation, can reduce installation difficulty.
Need to prove, based on the optical splitter port identification device of above-described embodiment, in another embodiment of the present invention, provide a kind of optical splitter port identification method, the schematic flow sheet of the optical splitter port identification method that Fig. 6 provides for another embodiment of the present invention; As shown in Figure 6, specifically comprise:
601, obtain respectively each grating in the grating array when the wavelength of the corresponding light wave of front-reflection, obtain current temperature value.
602, according to the reflection wavelength of described each grating and the positively related drift relation of temperature, and the current temperature value of obtaining and described each grating obtain the benchmark reflection wavelength that described each grating pair is answered when the wavelength of the corresponding light wave of front-reflection.
Corresponding relation between the sign of corresponding with described optical splitter minute optical port of the benchmark reflection wavelength of 603, answering according to described each grating pair is identified each road of described optical splitter and is divided optical port.
In an optional execution mode of the present invention, the corresponding relation between the sign of corresponding with described optical splitter minute optical port of the benchmark reflection wavelength of answering according to described each grating pair is identified each road of described optical splitter and is divided before the optical port, comprising:
Described each grating wavelength to the corresponding light wave of each road light wave reflection of described optical branching device output under fiducial temperature is preset as the benchmark reflection wavelength that described each grating pair is answered;
The benchmark reflection wavelength that described each grating pair is answered is made as the sign that the correspondence of described optical splitter is divided optical port.
Need to prove that the positively related drift of the reflection wavelength of above-mentioned grating and temperature relation specifically referring to the related content among Fig. 3-embodiment illustrated in fig. 5, repeats no more.
The embodiment of the invention with each grating under fiducial temperature, the wavelength of the corresponding light wave of reflection is made as the sign of optical splitter respective branches circuit (minute optical port), thereby can be by obtaining each grating in the grating array when the corresponding wavelength of front-reflection and current ambient temperature, reflection wavelength and the positively related drift relation of temperature according to each grating, obtain the benchmark reflection wavelength that each grating pair is answered, thereby can identify rapidly optical splitter each minute optical port, improve recognition efficiency.
Need to prove, optical splitter port identification device based on above-described embodiment provides a kind of optical splitter temperature checking method in another embodiment of the present invention, the schematic flow sheet of the optical splitter temperature checking method that Fig. 7 provides for another embodiment of the present invention, as shown in Figure 7, specifically comprise:
701, obtain respectively each grating in the grating array when the corresponding wavelength of front-reflection;
702, according to the reflection wavelength of described each grating and the positively related drift relation of temperature, the benchmark reflection wavelength that described each grating is answered when the corresponding wavelength of front-reflection and default described each grating pair compares, and obtains the Current Temperatures of described optical splitter.
Need to prove that the benchmark reflection wavelength that each grating pair is answered is each grating wavelength to the corresponding light wave of each road light wave reflection of described optical branching device output under fiducial temperature.
Need to prove that the positively related drift of the reflection wavelength of above-mentioned grating and temperature relation specifically referring to the related content among Fig. 3-embodiment illustrated in fig. 5, repeats no more.
The embodiment of the invention is by obtaining each grating in the grating array when the corresponding wavelength of front-reflection and current ambient temperature; According to reflection wavelength and the positively related drift relation of temperature of grating, calculate the Current Temperatures of optical splitter, therefore, the optical splitter of using present embodiment can be realized the function of far-end temperature monitoring.
The structural representation of the optical splitter temperature-detecting device that Fig. 8 provides for another embodiment of the present invention; As shown in Figure 8, comprising:
Described grating array is arranged in isothermal encapsulation box, when described isothermal is encapsulated in variation of ambient temperature, so that the uniformity of temperature profile in the described isothermal encapsulation box.
In an optional execution mode of the present invention, described device also comprises:
Need to prove that in the present embodiment, the optical splitter temperature-detecting device can be integrated in the isothermal encapsulation box, also can be an individual devices of separating in isothermal encapsulation box, the present invention's contrast is not construed as limiting.
The embodiment of the invention is by obtaining each grating in the grating array when the corresponding wavelength of front-reflection and current ambient temperature; According to reflection wavelength and the positively related drift relation of temperature of grating, calculate the Current Temperatures of optical splitter, therefore, the optical splitter of using present embodiment can be realized the function of far-end temperature monitoring.
The optical splitter port identification device that provides based on above-described embodiment, another embodiment of the present invention provides a kind of optical distribution network, comprise: the optical splitter port identification device described in each illustrated embodiment of above-mentioned Fig. 2-Fig. 5, the associated description of optical splitter port identification device repeats no more with reference to the related content in each illustrated embodiment of figure 2-Fig. 5.
The optical splitter port identification device that provides based on above-described embodiment, another embodiment of the present invention provides a kind of optical fiber telecommunications system, the structural representation of the optical fiber telecommunications system that Fig. 9 provides for another embodiment of the present invention, as shown in Figure 9, at least comprise optical line terminal and optical network unit, described optical line terminal is connected by optical distribution network with optical network unit, described optical distribution network comprises: the optical splitter port identification device described in each illustrated embodiment of above-mentioned Fig. 2-Fig. 5, the associated description of optical splitter port identification device repeats no more with reference to the related content in each illustrated embodiment of figure 2-Fig. 5.
In an optional execution mode of the present invention, described optical distribution network also comprises: above-mentioned optical splitter temperature-detecting device described in embodiment illustrated in fig. 8, the associated description of optical splitter temperature-detecting device repeats no more with reference to the related content in embodiment illustrated in fig. 8.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (12)
1. an optical splitter port identification device is characterized in that, comprising: optical branching device, grating array, band fibre, isothermal encapsulation box and identification module; The fine end of described band is connected with described optical branching device, and the fine other end of described band passes described grating array; Described grating array is arranged in described isothermal encapsulation box;
Described optical branching device is used for the light wave of input is divided into the output of two-way light wave at least;
Described grating array comprises two gratings at least, and the quantity of the grating that comprises in the described grating array is identical with the way of the light wave of described optical branching device output;
Described grating array, after being used for each road light wave with described optical branching device output and carrying out respectively filtering and process, the light wave of reflection corresponding wavelength, the wavelength of the corresponding light wave that each grating reflects under fiducial temperature in the described grating array is in order to identify each minute optical port of described optical splitter;
Described isothermal encapsulation box is used for when variation of ambient temperature, so that the uniformity of temperature profile in the described isothermal encapsulation box;
Identification module is used for obtaining respectively each grating of grating array when the wavelength of the corresponding light wave of front-reflection, obtains current temperature value; According to the reflection wavelength of described each grating and the positively related drift relation of temperature, and the current temperature value of obtaining and described each grating obtain the benchmark reflection wavelength that described each grating pair is answered when the wavelength of the corresponding light wave of front-reflection; Corresponding relation between the sign of corresponding with described optical splitter minute optical port of the benchmark reflection wavelength of answering according to described each grating pair is identified each road of described optical splitter and is divided optical port.
2. device according to claim 1 is characterized in that, described grating array comprises bragg grating array, and described isothermal encapsulation box comprises metal isothermal encapsulation box.
3. device according to claim 1 and 2 is characterized in that, described optical branching device is arranged in described isothermal encapsulation box, or separately encapsulation; Described identification module is integrated in the described isothermal encapsulation box, or separately encapsulation.
4. an optical splitter port identification method is characterized in that, comprising:
Obtain respectively each grating in the grating array when the wavelength of the corresponding light wave of front-reflection, obtain current temperature value;
According to the reflection wavelength of described each grating and the positively related drift relation of temperature, and the current temperature value of obtaining and described each grating obtain the benchmark reflection wavelength that described each grating pair is answered when the wavelength of the corresponding light wave of front-reflection;
Corresponding relation between the sign of corresponding with described optical splitter minute optical port of the benchmark reflection wavelength of answering according to described each grating pair is identified each road of described optical splitter and is divided optical port;
Described grating array is arranged in isothermal encapsulation box, when described isothermal is encapsulated in variation of ambient temperature, so that the uniformity of temperature profile in the described isothermal encapsulation box.
5. method according to claim 4 is characterized in that, described method also comprises:
Described each grating wavelength to the corresponding light wave of each road light wave reflection of described optical branching device output under fiducial temperature is preset as the benchmark reflection wavelength that described each grating pair is answered;
The benchmark reflection wavelength that described each grating pair is answered is made as the sign that the correspondence of described optical splitter is divided optical port.
6. an optical splitter temperature checking method is characterized in that, comprising:
Obtain respectively each grating in the grating array when the wavelength of the corresponding light wave of front-reflection;
According to the reflection wavelength of described each grating and the positively related drift relation of temperature, the benchmark reflection wavelength that described each grating is answered when the wavelength of the corresponding light wave of front-reflection and default described each grating pair compares, and obtains the Current Temperatures of described optical splitter;
Described grating array is arranged in isothermal encapsulation box, when described isothermal is encapsulated in variation of ambient temperature, so that the uniformity of temperature profile in the described isothermal encapsulation box.
7. method according to claim 6 is characterized in that, described method also comprises:
Described each grating wavelength to the corresponding light wave of each road light wave reflection of described optical branching device output under fiducial temperature is preset as the benchmark reflection wavelength that described each grating pair is answered.
8. an optical splitter temperature-detecting device is characterized in that, comprising:
Acquisition module is used for obtaining respectively each grating of grating array when the wavelength of the corresponding light wave of front-reflection;
Detection module, for the basis of each grating of grating array that obtains at described acquisition module when the wavelength of the corresponding light wave of front-reflection, reflection wavelength and the positively related drift relation of temperature according to described each grating, the benchmark reflection wavelength that described each grating is answered when the wavelength of the corresponding light wave of front-reflection and default described each grating pair compares, and obtains the Current Temperatures of described optical splitter;
Described grating array is arranged in isothermal encapsulation box, when described isothermal is encapsulated in variation of ambient temperature, so that the uniformity of temperature profile in the described isothermal encapsulation box.
9. device according to claim 8 is characterized in that, also comprises:
Module is set, and the wavelength that is used for the corresponding light wave of each road light wave reflection of will described each grating under fiducial temperature described optical branching device being exported is preset as the benchmark reflection wavelength that described each grating pair is answered.
10. an optical distribution network is characterized in that, comprising: such as the port identification device of each described optical splitter among the claim 1-3.
11. optical fiber telecommunications system, at least comprise optical line terminal and optical network unit, described optical line terminal is connected by optical distribution network with optical network unit, it is characterized in that, described optical distribution network comprises such as each described optical splitter port identification device among the claim 1-3.
12. system according to claim 11 is characterized in that, also comprises: optical splitter temperature-detecting device as claimed in claim 8 or 9.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210324655 CN103002359A (en) | 2012-09-05 | 2012-09-05 | Optical splitter port identification device and method thereof and optical splitter temperature detecting device and method thereof |
| CN201310049333.9A CN103107842B (en) | 2012-09-05 | 2012-09-05 | Optical splitter port identification system |
| EP13835906.2A EP2793411A4 (en) | 2012-09-05 | 2013-09-05 | Apparatus and method for optical splitter port recognition, and method and apparatus for optical splitter temperature detection |
| PCT/CN2013/083017 WO2014036959A1 (en) | 2012-09-05 | 2013-09-05 | Apparatus and method for optical splitter port recognition, and method and apparatus for optical splitter temperature detection |
| US14/336,446 US20140348466A1 (en) | 2012-09-05 | 2014-07-21 | Apparatus and Method for Recognizing Optical Splitter Port, and Method and Apparatus for Detecting Temperature of Optical Splitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210324655 CN103002359A (en) | 2012-09-05 | 2012-09-05 | Optical splitter port identification device and method thereof and optical splitter temperature detecting device and method thereof |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310049333.9A Division CN103107842B (en) | 2012-09-05 | 2012-09-05 | Optical splitter port identification system |
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| Publication Number | Publication Date |
|---|---|
| CN103002359A true CN103002359A (en) | 2013-03-27 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201210324655 Withdrawn CN103002359A (en) | 2012-09-05 | 2012-09-05 | Optical splitter port identification device and method thereof and optical splitter temperature detecting device and method thereof |
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| CN (1) | CN103002359A (en) |
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| WO2014036959A1 (en) * | 2012-09-05 | 2014-03-13 | 华为技术有限公司 | Apparatus and method for optical splitter port recognition, and method and apparatus for optical splitter temperature detection |
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- 2012-09-05 CN CN 201210324655 patent/CN103002359A/en not_active Withdrawn
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| WO2014036959A1 (en) * | 2012-09-05 | 2014-03-13 | 华为技术有限公司 | Apparatus and method for optical splitter port recognition, and method and apparatus for optical splitter temperature detection |
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| WO2021253878A1 (en) * | 2020-06-18 | 2021-12-23 | 华为技术有限公司 | Method, device, and system for port identification |
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Application publication date: 20130327 |