CN103004109A - Online calibration configurable site wavelength dependent attenuation method, a device and a system - Google Patents
Online calibration configurable site wavelength dependent attenuation method, a device and a system Download PDFInfo
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Abstract
The invention is applicable to the communication field and provides on-line calibration configurable site wavelength dependent attenuation method, a device and an optical communication system. The method comprises the following steps : obtaining the transmitting end of the optical amplifier to be calibrated single wave emitted light power; the configurable site wavelength through configuration, the calibration of the wavelength of the light penetrating configurable site arrive at the receiving end of an optical amplifier, and detecting the arrive at the receiving end of the optical amplifier optical incident optical power; according to the calibration of the single wave emitted light power to arrive at the receiving end of the optical amplifier optical incident optical power, obtain calibration of wavelength dependent attenuation. In the method, the network starting stage and the expansion phase can be real-time obtaining and updating wdl, so as to timely update the network state, ensuring the quality of the communication quality.. In addition, the invention can completely based on the prior the network the environment to realize the wavelength dependent attenuation on-line calibration, does not need to add any hardware, effectively controlling the cost increase.
Description
Technical field
The invention belongs to the communications field, relate in particular to method, the Apparatus and system of the configurable website wavelength dependent attenuation of a kind of on-line proving.
Background technology
In the optical communication network, wavelength division multiplexed network is at ROADM(reconfigurable optical add-dropmultiplexer, restructural type Optical Add/Drop Multiplexer) decay of website (claiming again configurable website) has wavelength dependence, the performance that is network is that wavelength is relevant to each passage, often a website can reach 3-4dB in the decay of different wave length passage, even larger.The WDL(wavelength dependent loss of this decay and passive device, wavelength dependent attenuation) relevant, the WDL of WSS (wavelengthselective switch, wavelength-selective switches) accounts for leading usually.
Fig. 1 shows the network topology structure of ROADM website in the prior art, and comprising a plurality of passages, each passage all contains several passive devices 101, and the light loss of this website mainly comes from the WDL of passive device WSS.With reference to figure 2, the about 1.5-2dB of maximum WDL of the single WSS that measures in the experiment.
Further with reference to figure 3, take a physical link l of a ROADM website as example, this path comprises two WSS, and have respectively transmitting terminal image intensifer 301 and receiving terminal image intensifer 302 to compensate the loss of passive device and optical fiber at incident end and exit end, the loss that produces when light signal transmits between A and B point is the loss of passive device.In practical operation, after carrying out the wavelength configuration of WSS, a common light service wavelength passage is got through physically, and in fact, in beginning or dilatation stage, if the practical business of this wavelength X does not also load (do not open such as laser, do not have the light transmission in the passage), usually can't obtain the light decay depreciation of wavelength X, therefore be difficult to eliminate optical attenuation to the impact of network performance.
In order to address the above problem, multiple solution has appearred in the prior art.One of them is the off-line calibration technology.Namely when producing, pass through the WDL of instrument (for example spectrometer) each optical passive component of actual measurement, demarcate and record.Each wavelength channel can adopt instrument accurately to measure in theory, but in practical operation, because workload is excessive, often come the WDL of equivalent substitution all wavelengths with limited wavelength points (for example long short-and-medium each wavelength) calibration value of measuring, very inaccurate.In addition, this scheme can't dynamically update WDL, state that can not the real-time update network.For example: the optical passive component of certain website is substituted or is again melted after the fibre, if the wavelength dependent attenuation of newly-increased device or molten fine point is unknown, then whole website can be absorbed in unknowable state.Wherein, the WDL of molten fine point is relevant with molten fine time and operator's qualification.With reference to figure 4, there is shown the WDL characteristic curve of molten fine point under the different molten fine time, during molten fine asynchronism(-nization), its WDL is also different.Each molten fine point may be brought the above loss of 0.2dB in the actual measurement, if this loss is unpredictable, will inevitably affect network performance.
Two of prior art is not consider the on-line proving technology of WDL.This technology is not distinguished the wavelength dependence of passage, and the signal light power pad value that employing detects in the sending and receiving end of opening wavelength substitutes the decay of all passages, is equivalent in fact ignore the WDL of different passages.This scheme can be finished by webmastering software online automatically, need not increase extra human input.But because that this scheme is considered as the decay of all wavelengths is identical, do not consider the difference in attenuation of different wave length, calibration result is inevitable very coarse, tends to introduce the error of 3 ~ 4dB.This error can increase along with the increase of the number of cascade WSS and other optical passive components, and with the WDL characteristic strong correlation of each optical passive component, so that network state is difficult to accurately know and upgrade more.
To sum up, prior art still can not be carried out accurately on-line proving to the WDL of configurable website, can't know in real time and upgrade the state of network, is unfavorable for network operation and optimization.
Summary of the invention
The purpose of the embodiment of the invention is to provide the method for the wavelength dependent attenuation of the configurable website of a kind of on-line proving, be intended to solve the problem that accurately to know the WDL of configurable website in the prior art, but be implemented in network offer at the beginning of or after service wavelength is opened the WDL of the configurable website of real-time update, for planning algorithm provides reliable input parameter, so that the network service of high-quality to be provided.
On the one hand, the embodiment of the invention provides the method for the wavelength dependent attenuation of the configurable website of a kind of on-line proving, and described method comprises:
Obtain single ripple emergent light power of the wavelength to be calibrated of transmitting terminal image intensifer outgoing;
Described configurable website is carried out wavelength break-through configuration, make the described configurable website of light wave break-through of described wavelength to be calibrated arrive the receiving terminal image intensifer, and detect the incident optical power of the light wave that arrives the receiving terminal image intensifer;
According to single ripple emergent light power of described wavelength to be calibrated and the described incident optical power of the light wave that arrives the receiving terminal image intensifer, obtain the wavelength dependent attenuation of described wavelength to be calibrated.
Further, when wavelength to be calibrated has when a plurality of, described described configurable website is carried out wavelength break-through configuration, make the described configurable website of light wave break-through of described wavelength to be calibrated arrive the receiving terminal image intensifer, and the incident optical power that detects the light wave that arrives the receiving terminal image intensifer is specially:
Described configurable website is carried out repeatedly wavelength break-through configuration, each wavelength break-through configuration all is: a kind of wavelength configuration in a plurality of wavelength to be calibrated is become the described configurable website of break-through, block the described configurable website of light wave break-through of other wavelength in the described wavelength to be calibrated, and the wavelength of the light wave of each described configurable website of break-through is all not identical;
After each wavelength break-through configuration is finished, all detect the incident optical power of the light wave that arrives described receiving terminal image intensifer.
Concrete, when the unemployed affair wavelength of described configurable website exists, described according to single ripple emergent light power of described wavelength to be calibrated and the described incident optical power of the light wave that arrives the receiving terminal image intensifer, the wavelength dependent attenuation that obtains described wavelength to be calibrated is specially:
By solving an equation: L (λ
i)=P
Out(λ
i)-PD
In, iObtain described wavelength dependent attenuation,
Wherein,
L (λ
i) be that configurable website is about wavelength X to be calibrated
iWavelength dependent attenuation;
P
Out(λ
i) be described wavelength X to be calibrated
iSingle ripple emergent light power;
PD
In, iFor arriving the wavelength X described to be calibrated of receiving terminal image intensifer
iThe incident optical power of light wave.
Further, when described configurable website has had service wavelength to exist, described configurable website is being carried out wavelength break-through configuration, make the described configurable website of light wave break-through of described wavelength to be calibrated arrive the receiving terminal image intensifer, and also comprise before the incident optical power of the light wave of detection arrival receiving terminal image intensifer:
Detect the initial incident optical power of the light wave of described receiving terminal image intensifer reception;
Described according to single ripple emergent light power of described wavelength to be calibrated and the described incident optical power of the light wave that arrives the receiving terminal image intensifer, obtain described wavelength dependent attenuation and be specially:
By solving an equation: L (λ
i)=P
Out(λ
i)-10*log
10(10^ (0.1*PD
In, i)-10^ (0.1*PD
In0)) obtain described wavelength dependent attenuation,
Wherein,
L (λ
i) be that configurable website is about wavelength X to be calibrated
iWavelength dependent attenuation;
P
Out(λ
i) be described wavelength X to be calibrated
iSingle ripple emergent light power;
PD
In, iInclude service wavelength and wavelength X to be calibrated for what arrive the receiving terminal image intensifer
iThe incident optical power of light wave;
PD
In0Be described initial incident optical power.
Further, the luminous power of the light wave of the wavelength to be calibrated of the described configurable website of break-through is lower than the luminous power of described service wavelength.
On the other hand, the embodiment of the invention provides the method for the wavelength dependent attenuation of the configurable website of another kind of on-line proving, and described method comprises:
Make the transmitting terminal image intensifer be operated in the spontaneous radiation state, and the spontaneous radiation intensity of controlling described transmitting terminal image intensifer is under a kind of spontaneous radiation intensity it;
Obtain the outgoing of described transmitting terminal image intensifer contain wavelength to be calibrated close ripple emergent light power;
Described configurable website is carried out the wavelength break-through configuration of preset times, each wavelength break-through configuration is all so that only have the described configurable website of a kind of light wave break-through of wavelength to be calibrated to arrive the receiving terminal image intensifer, block the described configurable website of light wave break-through of other wavelength, and the wavelength of the light wave of each described configurable website of break-through is all not identical; After each break-through configuration is finished, detect the incident optical power of the light wave that arrives the receiving terminal image intensifer;
Whether the change number of times of judging the spontaneous radiation intensity of described transmitting terminal image intensifer reaches preset value; If so, then be in the ripple emergent light power that closes that obtains under the various spontaneous radiation intensity according to described transmitting terminal image intensifer and determine wavelength dependent attenuation with the incident optical power of the light wave that arrives the receiving terminal image intensifer; If not, then change the spontaneous radiation intensity of transmitting terminal image intensifer, and jump to described obtain the outgoing of transmitting terminal image intensifer contain wavelength to be calibrated close ripple emergent light power, described preset value subtracts 1 more than or equal to the number of wavelength to be calibrated.
Concrete, describedly be in the incident optical power that closes ripple emergent light power and arrive the light wave of receiving terminal image intensifer that obtains under the various spontaneous radiation intensity according to described transmitting terminal image intensifer and determine that wavelength dependent attenuation is specially:
Contain n about L (λ by solution
i) the equation group of i unit linear function determine wavelength dependent attenuation;
The first linear function of described i is: 10*log
10(Σ
i10^ (0.1* (PD
k In, i+ L (λ
i))))=PD
k Out-ζ
k,
Wherein, i, k is natural number,
I=1,2,3...m, m are the number of wavelength to be calibrated; Σ
iExpression is to the optical power value summation of all wavelength to be calibrated;
k＝1，2，3...n；n≥m；
PD
k OutClose ripple emergent light power when being in k kind spontaneous emission intensity when the transmitting terminal image intensifer;
PD
k In, iWhen being in k kind spontaneous emission intensity when the transmitting terminal image intensifer, wavelength is λ
iLight wave arrive the incident optical power of receiving terminal image intensifer;
L (λ
i) be that configurable website is about wavelength X to be calibrated
iWavelength dependent attenuation;
ζ
kWhen being in k kind spontaneous emission intensity when the transmitting terminal image intensifer, the ratio of the total emergent light power that closes ripple emergent light power and all pre-configured break-through wavelength of transmitting terminal image intensifer.
Another aspect, the embodiment of the invention provide the device of the wavelength dependent attenuation of the configurable website of a kind of on-line proving, and described device comprises:
Acquiring unit is for single ripple emergent light power of the wavelength to be calibrated that obtains the outgoing of transmitting terminal image intensifer;
Wavelength configuration and detecting unit are used for described configurable website is carried out wavelength break-through configuration, make the described configurable website of light wave break-through of described wavelength to be calibrated arrive the receiving terminal image intensifer, and detect the incident optical power of the light wave that arrives the receiving terminal image intensifer;
Processing unit is used for obtaining the wavelength dependent attenuation of described wavelength to be calibrated according to single ripple emergent light power of described wavelength to be calibrated and the described incident optical power of the light wave that arrives the receiving terminal image intensifer.
Further, described wavelength configuration and detecting unit comprise:
Configuration module, be used for described configurable website is carried out repeatedly wavelength break-through configuration, each wavelength break-through configuration all is: a kind of wavelength configuration in a plurality of wavelength to be calibrated is become the described configurable website of break-through, block the described configurable website of light wave break-through of other wavelength in the described wavelength to be calibrated, and the wavelength of the light wave of each described configurable website of break-through is all not identical;
Detection module is used for detecting the incident optical power of the light wave that arrives described receiving terminal image intensifer after each wavelength break-through configuration is finished.
Concrete, when the unemployed affair wavelength of described configurable website existed, described processing unit comprised:
The first computing module is used for by solving an equation: L (λ
i)=P
Out(λ
i)-PD
In, iObtain described wavelength dependent attenuation,
Wherein,
L (λ
i) be that configurable website is about wavelength X to be calibrated
iWavelength dependent attenuation;
P
Out(λ
i) be described wavelength X to be calibrated
iSingle ripple emergent light power;
PD
In, iFor arriving the wavelength X described to be calibrated of receiving terminal image intensifer
iThe incident optical power of light wave.
Further, when described configurable website had had service wavelength to exist, described device also comprised:
The initial examination and measurement unit, the initial incident optical power of the light wave that receives for detection of described receiving terminal image intensifer;
Described processing unit comprises:
The second computing module is used for by solving an equation: L (λ
i)=P
Out(λ
i)-10*log
10(10^ (0.1*PD
In, i)-10^ (0.1*PD
In0)) obtain described wavelength dependent attenuation,
Wherein,
L (λ
i) be that configurable website is about wavelength X to be calibrated
iWavelength dependent attenuation;
P
Out(λ
i) be described wavelength X to be calibrated
iSingle ripple emergent light power;
PD
In, iInclude service wavelength and wavelength X to be calibrated for what arrive the receiving terminal image intensifer
iThe incident optical power of light wave;
PD
In0Be described initial incident optical power.
Another aspect, the embodiment of the invention provide a kind of optical WDM communication system, comprise the device of the wavelength dependent attenuation of the above-mentioned configurable website of on-line proving.
Again on the one hand, the embodiment of the invention provides the device of the wavelength dependent attenuation of the configurable website of another kind of on-line proving, described device comprises: the initial setting up unit, be used for making the transmitting terminal image intensifer be operated in the spontaneous radiation state, and the spontaneous radiation intensity of controlling described transmitting terminal image intensifer is under a kind of spontaneous radiation intensity it;
Acquiring unit, be used for obtaining the outgoing of described transmitting terminal image intensifer contain wavelength to be calibrated close ripple emergent light power;
Wavelength configuration and detecting unit, be used for described configurable website is carried out the wavelength break-through configuration of preset times, each wavelength break-through configuration is all so that only have the described configurable website of a kind of light wave break-through of wavelength to be calibrated to arrive the receiving terminal image intensifer, block the described configurable website of light wave break-through of other wavelength, and the wavelength of the light wave of each described configurable website of break-through is all not identical; After each break-through configuration is finished, detect the incident optical power of the light wave that arrives the receiving terminal image intensifer;
Processing unit is used for judging whether the change number of times of the spontaneous radiation intensity of described transmitting terminal image intensifer reaches preset value; If so, then be in the ripple emergent light power that closes that obtains under the various spontaneous radiation intensity according to described transmitting terminal image intensifer and determine wavelength dependent attenuation with the incident optical power of the light wave that arrives the receiving terminal image intensifer; If not, then change the spontaneous radiation intensity of transmitting terminal image intensifer, and jump to described obtain the outgoing of transmitting terminal image intensifer contain wavelength to be calibrated close ripple emergent light power, described preset value subtracts 1 more than or equal to the number of wavelength to be calibrated.
Further, described processing unit comprises:
Computing module is used for containing n about L (λ by solution
i) the equation group of i unit linear function obtain described wavelength dependent attenuation;
The first linear function of described i is: 10*log
10(Σ
i10^ (0.1* (PD
k In, i+ L (λ
i))))=PD
k Out-ζ
k,
Wherein, i, k is natural number,
I=1,2,3...m, m are the number of wavelength to be calibrated; Σ
iExpression is to the optical power value summation of all wavelength to be calibrated;
k＝1，2，3...n；n≥m；
PD
k OutClose ripple emergent light power when being in k kind spontaneous emission intensity when the transmitting terminal image intensifer;
PD
k In, iWhen being in k kind spontaneous emission intensity when the transmitting terminal image intensifer, wavelength is λ
iLight wave arrive the incident optical power of receiving terminal image intensifer;
L (λ
i) be that configurable website is about wavelength X to be calibrated
iWavelength dependent attenuation;
ζ
kWhen being in k kind spontaneous emission intensity when the transmitting terminal image intensifer, the ratio of the total emergent light power that closes ripple emergent light power and all pre-configured break-through wavelength of transmitting terminal image intensifer.
On the one hand, the embodiment of the invention provides another kind of optical WDM communication system, comprises the device of the wavelength dependent attenuation of the above-mentioned configurable website of another kind of on-line proving again.
The embodiment of the invention is by carrying out wavelength break-through configuration to configurable website, the light wave that makes wavelength to be calibrated is the configurable website of break-through one by one, and put the luminous power of putting with receiving end light in conjunction with the light of making a start and detect, the wavelength dependent attenuation that the light wave of determining wavelength to be calibrated occurs during through configurable website.It is extremely strong that the method adapts to scene, and no matter whether practical business loads, and all can determine the wavelength dependent attenuation of each physical link, in order to know in real time and upgrade the wavelength dependent attenuation of each passage, for planning algorithm provides reliable input parameter.In addition, because the method can calibrate the wavelength dependent attenuation of each physical link, different links can be equal to and look it, therefore it is compared with technology such as not considering wavelength dependent attenuation with traditional off-line calibration technology, eliminated the calibrated error of being brought by the difference in attenuation of different links, made the demarcation of wavelength dependent attenuation more accurate.And when network state changed (as changing or newly-increased passive device or again molten fine etc.), the wavelength dependent attenuation after can upgrading by the method actual measurement, and then the network state that upgrades in time guaranteed the communication quality of high-quality.In addition, the embodiment of the invention can realize the on-line proving of wavelength dependent attenuation fully based on existing network environment, need not increase any hardware, has effectively controlled the increase of cost.
Description of drawings
Fig. 1 is the network topology structure schematic diagram of ROADM website in the prior art;
Fig. 2 is the WDL curve of the single WSS that experiment records in the prior art;
Fig. 3 is the physical link schematic diagram of ROADM website in the prior art;
Fig. 4 is the molten fine time and the WDL characteristic curve that melts fine point in the prior art;
Fig. 5 is the method flow diagram of the wavelength dependent attenuation of the configurable website of on-line proving that provides of first embodiment of the invention; Fig. 6 is the method flow diagram of the wavelength dependent attenuation of the configurable website of on-line proving that provides of third embodiment of the invention;
Fig. 7 is the method flow diagram of the wavelength dependent attenuation of the configurable website of on-line proving that provides of fourth embodiment of the invention;
Fig. 8 is the method flow diagram of the wavelength dependent attenuation of the configurable website of on-line proving that provides of fifth embodiment of the invention;
Fig. 9 is the method flow diagram of the wavelength dependent attenuation of the configurable website of on-line proving that provides of sixth embodiment of the invention;
Figure 10 is the method flow diagram of the wavelength dependent attenuation of the configurable website of on-line proving that provides of seventh embodiment of the invention;
Figure 11 is the installation drawing of the wavelength dependent attenuation of the configurable website of on-line proving that provides of the present invention the 8th, nine, ten, 11 embodiment;
Figure 12 shows the installation drawing of the wavelength dependent attenuation of the configurable website of on-line proving that twelveth embodiment of the invention provides.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
Below in conjunction with specific embodiment specific implementation of the present invention is described in detail:
Embodiment one:
Fig. 5 shows the method flow diagram of the wavelength dependent attenuation of the configurable website of on-line proving that first embodiment of the invention provides, and for convenience of explanation, only shows the part relevant with present embodiment.
In step S101, obtain single ripple emergent light power of the wavelength to be calibrated of transmitting terminal image intensifer outgoing.
In embodiments of the present invention, transmitting terminal image intensifer (being called for short " light of making a start is put ") sends the light wave that comprises wavelength to be calibrated.This light wave can be complex wave (light wave that includes the multi-wavelength), also can be single ripple (light wave that only comprises a kind of wavelength), wherein, complex wave can derive from the spontaneous radiation that the light of making a start is put, and single ripple can obtain by external monochromatic source (such as laser or monochromatic conventional light source).Stimulated radiation and spontaneous radiation are ubiquitous phenomenons in the image intensifer, image intensifer utilizes stimulated radiation to realize the light signal of input is amplified, when image intensifer in when work, if there is not light signal to be input to image intensifer, then only have spontaneous radiation in the image intensifer this moment, if there is light signal to be input to image intensifer, then existing spontaneous radiation in image intensifer this moment, stimulated radiation is arranged again, and only stimulated radiation this moment is occupied an leading position.When only having spontaneous radiation in the image intensifer, image intensifer can be exported the light signal of various wavelength.When existing spontaneous radiation had stimulated radiation again in the image intensifer, image intensifer also can be exported the light signal of various wavelength, and the power of only identical with the wavelength of input optical signal light signal is the power that is far longer than the light signal of other wavelength.The complex wave that therefore, can produce based on the spontaneous radiation of image intensifer in the embodiment of the invention is demarcated wavelength dependent attenuation.
Generally there is the power monitoring device that the luminous power of the light wave of the output port of the luminous power of the light wave of the input port of image intensifer and image intensifer is monitored in the existing image intensifer, but, if being input to the light wave of image intensifer is complex wave, then the luminous power of the light wave of input port is monitored what obtain is total incident optical power of complex wave to the power monitoring device, correspondingly, the luminous power of the light wave of output port being monitored what obtain is total emergent light power of complex wave; Single ripple if be input to the light wave of image intensifer, the power monitoring device is monitored the incident optical power that is only single ripple that obtains to the luminous power of the light wave of input port, correspondingly, the luminous power of the light wave of output port is monitored the emergent light power that is only single ripple that obtains.In the existing application, what in most cases be input to image intensifer all is complex wave, in order to obtain the luminous power of each wavelength, can pass through OPM(Optical Performance Monitoring, optical property detects) install and monitor emitting the light wave of penetrating from the light of making a start, obtain the emergent light power of the light wave of each wavelength.Need to prove that except OPM, anyly complex wave is carried out the device that power detection all can obtain the luminous power of each single wavelength may be used to the present invention, the embodiment of the invention does not limit this.In addition,
Concrete, put when not having external monochromatic source when the light of making a start, can control the light of making a start and put and be in the spontaneous radiation state, make it give off complex wave, then detect single ripple emergent light power of each wavelength to be calibrated in the complex wave by the OPM device.Put when being connected with monochromatic source when the light of making a start, then can obtain by the mode of changing one by one monochromatic source single ripple of different wave length, and by the OPM device the single ripple emergent light power of every kind of single ripple when the light of making a start radiates is detected.
In step S102, configurable website is carried out wavelength break-through configuration, make the configurable website of light wave break-through of wavelength to be calibrated arrive the receiving terminal image intensifer, and detect the incident optical power of the light wave that arrives the receiving terminal image intensifer;
In embodiments of the present invention, after having obtained the single ripple emergent light power that comes from the light wave that the light of making a start puts, need dispose one by one the configurable website of light wave break-through of wavelength to be calibrated, and, behind the configurable website of light wave break-through of each wavelength, all to detect it and arrive the incident optical power of receiving terminal image intensifer when (being called for short " receiving end light is put "), arrive the incident optical power of receiving terminal image intensifer with the light wave that obtains all wavelength to be calibrated, for determining that WDL provides data.
Wherein, the reading that reports of the incident optical power that can put by direct inquiry receiving end light of incident optical power obtains.This is the existing function of wavelength division multiplexed network, is not elaborated in the present embodiment.
In step S103, according to single ripple emergent light power of wavelength to be calibrated and the incident optical power of the light wave that arrives the receiving terminal image intensifer, obtain the wavelength dependent attenuation of wavelength to be calibrated.
In embodiments of the present invention, the unit of single ripple emergent light power and incident optical power is dBm, and the unit of wavelength dependent attenuation or gain is dB, and is positive number, and this is equally applicable to following each embodiment.
The embodiment of the invention is by carrying out wavelength break-through configuration to configurable website, the light wave that makes wavelength to be calibrated is the configurable website of break-through one by one, and put the luminous power of putting with receiving end light in conjunction with the light of making a start and detect, the WDL that the light wave of determining wavelength to be calibrated occurs during through configurable website.It is extremely strong that the method adapts to scene, and no matter whether practical business loads, and all can determine the WDL of each physical link, in order to know in real time and upgrade the WDL of each passage, for planning algorithm provides reliable input parameter.In addition, because the method can calibrate the WDL of each physical link, different links can be equal to and look it, so it is compared with technology such as not considering WDL with traditional off-line calibration technology, eliminated the calibrated error of being brought by the difference in attenuation of different links, it is more accurate that WDL is demarcated.And when network state changed (as changing or newly-increased passive device or again molten fine etc.), the WDL after can upgrading by the method actual measurement, and then the network state that upgrades in time guaranteed the communication quality of high-quality.In addition, the embodiment of the invention can realize the on-line proving of WDL fully based on existing network environment, need not increase any hardware, has effectively controlled the increase of cost.
Embodiment two:
When needs during to a plurality of Wavelength calibration wavelength dependent attenuation, the embodiment of the invention provides a kind of better implementation for step S102 on the basis of above-described embodiment one, specific as follows:
Configurable website is carried out repeatedly wavelength break-through configuration, each wavelength break-through configuration all is: a kind of wavelength configuration in a plurality of wavelength to be calibrated is become the configurable website of break-through, block the configurable website of light wave break-through of other wavelength in the wavelength to be calibrated, and the wavelength of the light wave of each configurable website of break-through is all not identical; And, after each wavelength break-through configuration is finished, all detect the incident optical power of the light wave that arrives the receiving terminal image intensifer.
More specifically, said method can be implemented by following steps:
The first step disposes the configurable website of light wave break-through of a kind of wavelength in the wavelength to be calibrated, and blocks the configurable website of light wave break-through of other wavelength in the wavelength to be calibrated;
Second step detects this light wave and arrives the incident optical power that receiving end light is put;
In the 3rd step, cancel the break-through configuration of this light wave;
In the 4th step, dispose the configurable website of light wave break-through of another kind of wavelength to be calibrated, and block the configurable website of light wave break-through of other wavelength in the wavelength to be calibrated;
In the 5th step, detect this another kind light wave and arrive the incident optical power that receiving end light is put;
In the 6th step, cancel the break-through configuration of another kind of light wave;
……
The rest may be inferred, until finish the break-through configuration of the light wave of whole wavelength to be calibrated, and detect the incident optical power of each light wave that arrives the receiving terminal image intensifer.
In said process, after the detection of the break-through configuration of at every turn finishing a kind of wavelength and incident optical power, can judge whether the number of times of the configurable website of Different lightwave break-through reaches preset times, the number of this preset times 〉=wavelength to be calibrated.Be then to finish, otherwise jump to the first step, proceed the break-through configuration of lower a kind of wavelength and the detection of incident optical power, until finish the break-through configuration of all wavelength to be calibrated and the detection of incident optical power.
The embodiment of the invention can obtain the incident optical power that each wavelength to be calibrated is put at receiving end light accurately by said method, and step is succinct, and execution speed is fast, is not prone to error, for the WDL that determines configurable website provides accurate data.
Embodiment three:
Fig. 6 shows the method flow diagram of the wavelength dependent attenuation of the configurable website of on-line proving that third embodiment of the invention provides, and for convenience of explanation, only shows the part relevant with present embodiment.
The embodiment of the invention is applicable to the unemployed affair wavelength existence of configurable website in the opening stage, and puts the situation that does not have external monochromatic source but dispose the OPM device at the light of making a start, and detailed content is as follows:
In step S301, the light of making a start is put be operated in the spontaneous radiation state, and the control spontaneous radiation intensity that light puts of making a start is under a kind of spontaneous radiation intensity it;
In step S302, put single ripple emergent light power P at light-emitting window place at the light of making a start by the light wave of each wavelength to be calibrated in the complex wave of OPM device detection spontaneous radiation
Out(λ
i);
Wherein, λ
iThe wavelength of representative configuration break-through, i=1,2,3...m; M is the number of wavelength to be calibrated.
In this step, can obtain P
Out(λ
1), P
Out(λ
2) ... P
Out(λ
m);
In step S303, the configuration wavelength X
iThe configurable website of light wave break-through, block simultaneously the configurable website of light wave break-through of other wavelength in the wavelength to be calibrated, and the inquiry wavelength X
iLight wave arrive incident optical power that receiving end light puts report reading PD
In, i
In step S304, the cancellation wavelength X
iThe break-through configuration of light wave;
In step S305, judge whether the number of times of the configurable website of configuration Different lightwave break-through reaches preset times, be then to carry out step S306, otherwise jump to step S303.
In this step, the number of preset times 〉=wavelength to be calibrated.
In step S306, obtain wavelength dependent attenuation by separating following equation;
This equation is specially: L (λ
i)=P
Out(λ
i)-PD
In, i
Wherein,
L (λ
i) be that configurable website is about wavelength X to be calibrated
iWavelength dependent attenuation;
P
Out(λ
i) be wavelength X to be calibrated
iSingle ripple emergent light power;
PD
In, iThe wavelength X to be calibrated of putting for arriving receiving end light
iThe incident optical power of light wave.
The embodiment of the invention can be put in the situation that does not have external monochromatic source at the light of making a start, and detects single ripple emergent light power that the light of making a start is put by existing OPM device, is not needing to establish in addition the on-line proving that has realized WDL under the condition of the hardware such as external light source.
Certainly, the embodiment of the invention light that also can be used for making a start is put the situation that is provided with wideband light source, can directly obtain complex wave by this wideband light source.
Embodiment four:
Fig. 7 shows the method flow diagram of the wavelength dependent attenuation of the configurable website of on-line proving that fourth embodiment of the invention provides, and for convenience of explanation, only shows the part relevant with present embodiment.
The embodiment of the invention is applicable to the unemployed affair wavelength existence of configurable website in the opening stage, and puts the situation that is circumscribed with monochromatic source and is furnished with the OPM device at the light of making a start, and detailed content is as follows:
In step S401, putting configuration one emission wavelength at the light of making a start is λ
iMonochromatic source, and detect the single ripple emergent light power P of light when the light of making a start radiates that this monochromatic source is sent by the OPM device
Out(λ
i);
In step S402, the configuration wavelength X
iThe configurable website of light wave break-through, and inquire about that this light wave arrives incident optical power that receiving end light puts report reading PD
In, i
In embodiments of the present invention, can be in the configuration wavelength X
iThe configurable website of light wave break-through the time other light waves are blocked, to improve the accuracy that detects data.
In step S403, the cancellation wavelength X
iThe break-through configuration of light wave;
In step S404, judge whether the number of times of the configurable website of configuration Different lightwave break-through reaches preset times, be then to carry out step S405, otherwise jump to step S401;
In this step, preset times is more than or equal to the number of wavelength to be calibrated;
In this step, when the number of times of configuration break-through reaches preset times, can withdraw external light source to recover the normal operation of website.
In embodiments of the present invention, monochromatic source specifically can be the single monochromatic source of a kind of emission wavelength; The monochromatic source that also can be comprised of a wide spectrum light source and a filter when the light wave of certain wavelength of needs, can obtain by the mode of changing filter the monochromatic source of required wavelength.Monochromatic source in the present embodiment can adopt any one in above-mentioned two kinds of monochromatic sources.
In step S405, determine wavelength dependent attenuation by separating following equation;
This equation is specially: L (λ
i)=P
Out(λ
i)-PD
In, i
Wherein, L (λ
i), P
Out(λ
i), PD
In, iImplication identical with above-mentioned embodiment three.
The embodiment of the invention is identical with the principle of above-described embodiment three, all be applicable to the situation that the unemployed affair wavelength of the configurable website of opening stage exists, all be to detect respectively the light of making a start to put the luminous power of putting with receiving end light, then single ripple emergent light power and incident optical power subtracted each other and obtain wavelength dependent attenuation.Its difference only is that embodiment three is fit to not have the situation of monochromatic source, and its emergent light is the complex wave of spontaneous radiation, need to detect by the OPM device single ripple emergent light power of the light wave of each wavelength to be calibrated.And the light of making a start of present embodiment is put and is furnished with monochromatic source, can obtain single ripple by the mode of changing monochromatic source, then detects single ripple emergent light power by the OPM device.And then can determine that also present embodiment also is applicable to not be provided with the situation of OPM device, because the light of making a start is put the monochromatic source of configurable different wave length, directly the cargo tracer ripple is put single ripple emergent light power at light-emitting window place at the light of making a start.But present embodiment still preferably detects single ripple emergent light power by the OPM device, is intended to improve accuracy of detection.
Embodiment five:
Fig. 8 shows the method flow diagram of the wavelength dependent attenuation of the configurable website of on-line proving that fifth embodiment of the invention provides, and for convenience of explanation, only shows the part relevant with present embodiment.
The embodiment of the invention is applicable in the dilatation stage several physical links of configurable website has had service wavelength to exist, and puts without monochromatic source at the light of making a start but dispose the situation of OPM device, and detailed content is as follows:
In step S501, keep the light of making a start and put and be in normal operating conditions, constant with the luminous power that control is emitted the light signal that has service wavelength of penetrating from the light of making a start; The purpose of this step is for fear of existing service wavelength is impacted.
In step S502, detect single ripple emergent light power P that the light of making a start is put each wavelength to be calibrated in the complex wave of spontaneous radiation by the OPM device
Out(λ
i), and inquiry arrive the light wave that receiving end light puts initial incident optical power report reading PD
In0
In the present embodiment, because the light wave of existing service wavelength is put through the light of making a start, existing spontaneous radiation had again stimulated radiation during light was put so make a start this moment, and spontaneous radiation is to produce the light wave of various wavelength, and exported from image intensifer.The spontaneous radiation meeting that light is put owing to make a start produces the light wave of various wavelength, therefore, certainly exist the light wave of wavelength to be calibrated in the complex wave that the spontaneous radiation that the light of making a start is put produces, so can detect single ripple emergent light power that the light of making a start is put each wavelength to be calibrated in the complex wave of spontaneous radiation among the step S502.
In embodiments of the present invention, the OPM device can detect whole service wavelength λ
jWith other wavelength luminous power, wherein, service wavelength λ
jLuminous power P
Out(λ
j) be not used in the calculating wavelength dependent attenuation;
Report reading PD what receiving end light was put inquiry
In0Being the incident optical power of service wavelength, is when not disposing wavelength break-through to be calibrated, and the light wave of service wavelength arrives the initial incident optical power that receiving end light is put.
In step S503, the configuration wavelength X
iThe configurable website of light wave break-through, block simultaneously the configurable website of light wave break-through of other wavelength in the wavelength to be calibrated, and inquiry arrive the light wave that receiving end light puts incident optical power report reading PD
In, i
In embodiments of the present invention, report reading PD
In, iComprise service wavelength λ
jWavelength X to be calibrated with the configuration break-through
iTotal incident optical power;
In step S504, the cancellation wavelength X
iBreak-through configuration;
In step S505, judge whether the number of times of configuration Different lightwave break-through reaches preset times, be then to carry out step S506, otherwise jump to step S503.
In this step, the number of preset times 〉=wavelength to be calibrated.
In step S506, by solving an equation:
L (λ
i)=P
Out(λ
i)-10*log
10(10^ (0.1*PD
In, i)-10^ (0.1*PD
In0)) obtain wavelength dependent attenuation,
Wherein,
L (λ
i) be that configurable website is about wavelength X to be calibrated
iWavelength dependent attenuation;
P
Out(λ
i) be wavelength X to be calibrated
iSingle ripple emergent light power;
PD
In, iInclude service wavelength and wavelength X to be calibrated for what arrive the receiving terminal image intensifer
iThe incident optical power of light wave;
PD
In0Be initial incident optical power.
In above-mentioned formula, 10*log
10(10^ (0.1*PD
In, i)-10^ (0.1*PD
In0)) namely to represent wavelength be λ
iLight wave arrive the incident optical power that receiving end light is put.
In embodiments of the present invention, incident optical power " 10*log
10(10^ (0.1*PD
In, i)-10^ (0.1*PD
In0)) " with above-described embodiment three and four in PD
In, iMeaning is identical, all is that wavelength is λ
iThe incident optical power of light wave to be calibrated, therefore, definite method of WDL is identical in fact in the embodiment of the invention and above-described embodiment, all is to determine that the difference of single ripple emergent light power and incident optical power is wavelength dependent attenuation.Difference only is: do not have service wavelength open-minded among the embodiment three and four, the light that receiving end light is put reception only comprises the wavelength that disposes break-through, therefore puts the incident optical power that the luminous power that detects is light wave to be detected at receiving end light.The existing service wavelength of configurable website in the embodiment of the invention is open-minded, because putting, receiving end light can not distinguish wavelength to be detected and service wavelength, therefore need to be before the configuration break-through, put the initial incident optical power that detects service wavelength at receiving end light, and then configuration light wave break-through, and detect total incident optical power, and total incident optical power and initial incident optical power are subtracted each other, determine WDL.
The embodiment of the invention can detect the WDL that all do not open link after service wavelength is opened, neither affect the business of having opened, and also do not need to increase hardware, and accuracy of detection is high.
Embodiment six:
Fig. 9 shows the method flow diagram of the wavelength dependent attenuation of the configurable website of on-line proving that sixth embodiment of the invention provides, and for convenience of explanation, only shows the part relevant with present embodiment.
The embodiment of the invention is applicable in the dilatation stage several physical links of configurable website has had service wavelength to exist, and puts the situation that disposes monochromatic source and OPM device at the light of making a start, and detailed content is as follows:
In step S601, what the light wave of inquiry business wavelength arrived initial incident optical power that receiving end light puts reports reading PD
In0
In step S602, putting configuration one wavelength at the light of making a start is λ
iMonochromatic source, detect light wave that this monochromatic source sends by the OPM device and emit single ripple emergent light power P when penetrating through the light of making a start
Out(λ
i);
In step S603, the configuration wavelength X
iThe configurable website of light wave break-through, and report reading PD what receiving end light was put the inquiry incident optical power
In, i
Report reading PD
In, iThe wavelength X to be calibrated that comprises service wavelength and configuration break-through
iTotal incident optical power.
In embodiments of the present invention, can in the configurable website of configuration light wave break-through, treat other light waves of demarcating in the light wave and block, to improve the accuracy that detects data.
In step S604, the cancellation wavelength X
iThe break-through configuration of light wave;
In step S605, judge whether the number of times of the configurable website of configuration Different lightwave break-through reaches preset times, be then to carry out step S606, otherwise jump to step S602;
In this step, preset times is more than or equal to the number of wavelength to be calibrated;
In step S606, obtain wavelength dependent attenuation by separating following equation,
This equation is specially: L (λ
i)=P
Out(λ
i)-10*log
10(10^ (0.1*PD
In, i)-10^ (0.1*PD
In0)).Identical in each physical quantity in this equation and above-described embodiment five, the embodiment of the invention is identical with above-described embodiment essence, all be applicable to the dilatation stage, the incident optical power of light wave to be calibrated is initial incident optical power poor of total incident optical power and service wavelength.
In embodiments of the present invention, to activate the service in order not affecting, can to make the luminous power of the light wave that the monochromatic light ray source produces be lower than the luminous power of service wavelength signal.
Preferably, more than the low 10dB of luminous power of luminous power than existing service wavelength signal of the light wave of monochromatic light light source generation.
Identical with among the embodiment four of monochromatic external light source in the embodiment of the invention repeats no more herein.
Embodiment seven:
Figure 10 shows the method flow diagram of the wavelength dependent attenuation of the configurable website of on-line proving that seventh embodiment of the invention provides, and for convenience of explanation, only shows the part relevant with present embodiment.
The embodiment of the invention is applicable in the opening stage configurable website does not have service wavelength to exist, and the light of making a start is put the situation that does not dispose monochromatic source and OPM device.
Light is put and is not disposed monochromatic source owing to make a start, and does not also have the OPM device, therefore can't put at the light of making a start and obtain single ripple emergent light power, closes ripple emergent light power and can only get access to, and for this situation, the embodiment of the invention provides the online calibration method of a kind of WDL.The method mainly realizes by following steps:
In step S701, the light of making a start is put be operated in the spontaneous radiation state, and the control spontaneous radiation intensity that light puts of making a start is under a kind of spontaneous radiation intensity it;
In step S702, obtain the light of making a start emit penetrate contain wavelength to be calibrated close ripple emergent light power;
In embodiments of the present invention, the light wave that spontaneous radiation is sent is complex wave, is the white light that includes whole wavelength to be calibrated, and that obtains closes total emergent light power that ripple emergent light power is the spontaneous radiation complex wave.
In step S703, configurable website is carried out the wavelength break-through configuration of preset times, each wavelength break-through configuration is all so that only have the configurable website of a kind of light wave break-through of wavelength to be calibrated to arrive the receiving terminal image intensifer, block the configurable website of light wave break-through of other wavelength, and the wavelength of the light wave of each configurable website of break-through is all not identical; After each break-through configuration is finished, detect the incident optical power of the light wave that arrives the receiving terminal image intensifer;
In step S704, judge whether the change number of times of the spontaneous radiation intensity of transmitting terminal image intensifer reaches preset value; If so, then carry out step S705, if not, then carry out step S706: change the spontaneous radiation intensity of transmitting terminal image intensifer, then jump to step S702.
In step S705, put according to the light of making a start and to be in the incident optical power that closes ripple emergent light power and arrive the light wave that receiving end light puts that obtains under the various spontaneous radiation intensity and to determine wavelength dependent attenuation.
In embodiments of the present invention, this preset value subtracts 1 more than or equal to the number of wavelength to be calibrated.
In embodiments of the present invention, above-mentioned ripple emergent light power and the incident optical power of closing can obtain by the direct inquiry reading that reports that light puts the luminous power of putting with receiving end light of making a start.This is the existing function of wavelength division multiplexed network, is not elaborated in the present embodiment.
The embodiment of the invention can be put in the situation that is not provided with monochromatic source and OPM device at the light of making a start and be implemented, put closing ripple emergent light power and arriving the incident optical power that receiving end light puts of obtaining when being in different spontaneous radiation intensity according to the light of making a start and determine WDL, do not need to increase any hardware and can realize that the on-line proving of WDL and network upgrade, simple to operate and do not increase hardware cost.
Further, when the change number of times of the spontaneous radiation intensity of putting when the light of making a start reaches preset value, can obtain wavelength dependent attenuation by separating following equation group:
This equation group is: 10*log
10(Σ
i10^ (0.1* (PD
k In, i+ L (λ
i))))=PD
k Out-ζ
k,
Wherein, i, k is natural number,
I=1,2,3...m, m are the number of wavelength to be calibrated; Σ
iExpression is to the optical power value summation of all wavelength to be calibrated;
k＝1，2，3...n；n≥m；
PD
k OutClose ripple emergent light power when being in k kind spontaneous emission intensity for putting when the light of making a start;
PD
k In, iWhen being in k kind spontaneous emission intensity for putting when the light of making a start, wavelength is λ
iLight wave arrive the incident optical power that receiving end light is put;
L (λ
i) be that configurable website is about wavelength X to be calibrated
iWavelength dependent attenuation;
ζ
kWhen being in k kind spontaneous radiation intensity for putting when the light of making a start, the ratio of the total emergent light power that closes ripple emergent light power and all pre-configured break-through wavelength that the light of making a start is put.The unevenness of the light amplification gain spectrum of making a start under this value and the k kind spontaneous radiation intensity and all are pre-, and to demarcate the wide ratio of the total bandwidth of wavelength and image intensifer overall gain bands of a spectrum relevant, and unit is dB.ζ under the different spontaneous radiation intensity
kDiffer less than 0.2dB.
Above-mentioned equation group is specially:
10*log
10(Σ
i10^(0.1*(PD
1 in，1+L(λ
i))))=PD
1 out-ζ
1
10*log
10(Σ
i10^(0.1*(PD
2 in，2+L(λ
i))))=PD
2 out-ζ
2
10*log
10(Σ
i10^(0.1*(PD
3 in，3+L(λ
i))))=PD
3 out-ζ
3
.
.
.
10*log
10(Σ
i10^(0.1*(PD
n in，i?+L(λ
i))))=PD
n out-ζ
n
In the present embodiment, ζ
kCan record in advance the ζ under the different spontaneous radiation intensity
kOnly differ less than 0.2dB, therefore can make ζ
1=ζ
2=...=ζ
n, its occurrence can be according to a plurality of ζ of prediction
kValue determine, for example get its mean value.In practical operation, ζ
kCan be inputted voluntarily by operating personnel, also can be pre-stored in system, when detecting, reality directly calls.
Work as ζ
kDuring for the precognition value, above-mentioned equation group has unique solution when n 〉=m, therefore, and can unique definite wavelength dependent attenuation L (λ by separating above-mentioned equation group
1), L (λ
2), L (λ
3) ... L (λ
m).Then need make make a start light put be operated at least 80 kind different states as example take passage to be calibrated as 80, the process of the break-through of above-mentioned configuration light wave and cancellation break-through is carried out 80*80 time at least.Be appreciated that and work as ζ
kDuring for non-precognition value, then need to make the light of making a start to put to be operated at least 81 kinds of different states, i.e. n 〉=m+1, the process of the break-through of above-mentioned configuration light wave and cancellation break-through is carried out 81*80 time at least.The embodiment of the invention preferably records ζ in advance
k
In embodiments of the present invention, preset value is used for the change number of times of the spontaneous radiation intensity that restriction origin light puts, and according to foregoing as can be known, the total number that only has spontaneous radiation intensity is during more than or equal to the number of wavelength to be calibrated, above-mentioned equation group just has unique solution, so the preset value in the present embodiment needs to subtract 1 more than or equal to the number of wavelength to be calibrated.
Certainly, the deterministic process among the above-mentioned steps S704 can realize by the total number of judging spontaneous radiation intensity that also at this moment, preset value needs the number more than or equal to wavelength to be calibrated, to guarantee above-mentioned equation group unique solution is arranged.
One of ordinary skill in the art will appreciate that, all or part of step in above-described embodiment can be finished by the relevant hardware of program command, this program can be stored in the computer read/write memory medium, and this storage medium can be ROM/RAM, disk, CD etc.
Embodiment eight:
Figure 11 shows the installation drawing of the wavelength dependent attenuation of the configurable website of on-line proving that eighth embodiment of the invention provides, and for convenience of explanation, only shows the part relevant with present embodiment.
Acquiring unit 1 obtains single ripple emergent light power of the wavelength to be calibrated of transmitting terminal image intensifer (being called for short " light of making a start is put ") outgoing;
2 pairs of configurable websites of wavelength configuration and detecting unit carry out wavelength break-through configuration, make the configurable website of light wave break-through of wavelength to be calibrated arrive receiving terminal image intensifer (being called for short " receiving end light is put "), and detect the incident optical power that arrives the light wave that receiving end light puts;
In embodiments of the present invention, the light of making a start is put and can be sent the light wave that comprises wavelength to be calibrated.This light wave can be complex wave, also can be single ripple.Wherein, complex wave can derive from the spontaneous radiation that the light of making a start is put, and single ripple can obtain by external monochromatic source (such as laser or monochromatic conventional light source).Acquiring unit 1 can carry out power detection to complex wave or single ripple, obtains the corresponding data of wavelength and power, and then obtains single ripple emergent light power of wavelength to be calibrated.
The embodiment of the invention is carried out wavelength break-through configuration by wavelength configuration and detecting unit to configurable website, the light wave that makes wavelength to be calibrated is the configurable website of break-through one by one, and in conjunction with acquiring unit and wavelength configuration and detecting unit is put by the light of making a start and receiving end light is put capable power detection into, to determine the WDL of configurable website.It is extremely strong that this device adapts to scene, no matter whether practical business loads, all can determine the WDL of each physical link so that at the beginning of network is offered and service wavelength can know in real time and upgrade the WDL of each passage after opening, for planning algorithm provides reliable input parameter.Compare with technology such as not considering WDL with traditional off-line calibration technology, because this device can calibrate the WDL of each physical link, different links can be equal to and look it, therefore eliminate the calibrated error of being brought by the difference in attenuation of different links, it is more accurate that WDL is demarcated.And when network state changed (as changing or newly-increased passive device or again molten fine etc.), the WDL after can upgrading by this device actual measurement, and then the network state that upgrades in time guaranteed the communication quality of high-quality.
Embodiment nine:
In embodiments of the present invention, wavelength configuration and detecting unit 2 may further include: configuration module 21 and detection module 22.21 pairs of configurable websites of configuration module carry out repeatedly wavelength break-through configuration, each wavelength break-through configuration all is: a kind of wavelength configuration in a plurality of wavelength to be calibrated is become the configurable website of break-through, block the configurable website of light wave break-through of other wavelength in the wavelength to be calibrated, and the wavelength of the light wave of each configurable website of break-through is all not identical; After each wavelength break-through configuration is finished, detect the incident optical power of the light wave that arrives the receiving terminal image intensifer by detection module 22.
More specifically, configuration module 21 and detection module 22 can carry out the detection of wavelength break-through configuration and incident optical power according to the step described in the embodiment two, repeat no more herein.
The embodiment of the invention realizes wavelength break-through configuration and detects the incident optical power that each wavelength to be calibrated is put at receiving end light by configuration module 21 and detection module 22, simple for structure, execution speed is fast, is not prone to error, for the WDL that determines configurable website provides accurate data.
Embodiment ten:
The embodiment of the invention is applicable to the situation that the unemployed affair wavelength of configurable website exists.Concrete, processing unit 3 can comprise the first computing module 31, is used for by solving an equation: L (λ
i)=P
Out(λ
i)-PD
In, iObtain wavelength dependent attenuation,
Wherein,
L (λ
i) be that configurable website is about wavelength X to be calibrated
iWavelength dependent attenuation;
P
Out(λ
i) be wavelength X to be calibrated
iSingle ripple emergent light power;
PD
In, iFor arriving the wavelength X to be calibrated of receiving terminal image intensifer
iThe incident optical power of light wave.
The method that above-mentioned data communication device is crossed embodiment three or four to be provided obtains, and repeats no more.
The embodiment of the invention is processed by the data of 31 pairs of acquiring units 1 of the first computing module and wavelength configuration and detecting unit 2 outputs, has accurately obtained the WDL of configurable website.
Embodiment 11:
The embodiment of the invention is applicable to the situation that configurable website has had service wavelength to exist.When configurable website had had service wavelength to exist, then receiving end light was put the light wave that the light wave that receives had both comprised wavelength to be detected, comprised again the light wave of service wavelength, and directly can not obtain WDL by above-mentioned the first computing module 31 this moment.Therefore, the device of the wavelength dependent attenuation of the configurable website of on-line proving in the present embodiment also comprises initial examination and measurement unit 4, is mainly used in detecting before carrying out wavelength configuration the initial incident optical power that receiving end light is put the light wave of reception.
At this moment, processing unit 3 comprises the second computing module 32, is used for by solving an equation: L (λ
i)=P
Out(λ
i)-10*log
10(10^ (0.1*PD
In, i)-10^ (0.1*PD
In0)) obtain wavelength dependent attenuation,
Wherein,
L (λ
i) be that configurable website is about wavelength X to be calibrated
iWavelength dependent attenuation;
P
Out(λ
i) be wavelength X to be calibrated
iSingle ripple emergent light power;
PD
In, iInclude service wavelength and wavelength X to be calibrated for what arrive the receiving terminal image intensifer
iThe incident optical power of light wave;
PD
In0Be initial incident optical power.
Above-mentioned data can obtain according to the method that embodiment five or six provides, and repeat no more herein.
The embodiment of the invention can detect the WDL that all do not open link after service wavelength is opened, neither affect the business of having opened, and also do not need to increase hardware, and accuracy of detection is high.
Embodiment 12:
Figure 12 shows the installation drawing of the wavelength dependent attenuation of the configurable website of on-line proving that twelveth embodiment of the invention provides, and for convenience of explanation, only shows the part relevant with present embodiment.
The embodiment of the invention light that mainly is applicable to make a start is put the situation that is not provided with monochromatic source and OPM device.When the light of making a start is put when not being provided with monochromatic source, can obtain complex wave by the spontaneous radiation that the light of making a start is put, simultaneously, light is put and is not had the OPM device owing to make a start, and therefore can obtain the incident optical power that ripple emergent light power and receiving end light are put the light wave of reception that closes of complex wave by the direct inquiry reading that reports that light puts the luminous power of putting with receiving end light of making a start.
Concrete,
Initial setting up unit 1 is put the light of making a start to be operated in the spontaneous radiation state, and the control spontaneous radiation intensity that light puts of making a start is under a kind of spontaneous radiation intensity it;
Acquiring unit 2 obtain the light of making a start emit penetrate contain wavelength to be calibrated close ripple emergent light power;
3 pairs of configurable websites of wavelength configuration and detecting unit carry out the wavelength break-through configuration of preset times, each wavelength break-through configuration is all so that only have the configurable website arrival of a kind of light wave break-through of wavelength to be calibrated receiving end light to put, block the configurable website of light wave break-through of other wavelength, and the wavelength of the light wave of each configurable website of break-through is all not identical; After each break-through configuration is finished, the incident optical power of the light wave that detection arrival receiving end light is put;
This wavelength configuration and detecting unit 3 can be with embodiment nine described configuration module and the detection modules of comprising.
The embodiment of the invention can be put in the situation that is not provided with monochromatic source and OPM device at the light of making a start, put closing ripple emergent light power and arriving the incident optical power that receiving end light puts of obtaining when being in different spontaneous radiation intensity according to the light of making a start and determine WDL, do not need to increase any hardware and can realize that the on-line proving of WDL and network upgrade, simple to operate and do not increase hardware cost.
Further, processing unit 4 can comprise computing module 41, is used for containing n about L (λ by solution
i) the equation group of i unit linear function obtain wavelength dependent attenuation;
This i unit linear function is: 10*log
10(Σ
i10^ (0.1* (PD
k In, i+ L (λ
i))))=PD
k Out-ζ
k,
Wherein, i, k is natural number,
I=1,2,3...m, m are the number of wavelength to be calibrated; Σ
iExpression is to the optical power value summation of all wavelength to be calibrated;
k＝1，2，3...n；n≥m；
PD
k OutClose ripple emergent light power when being in k kind spontaneous emission intensity when the transmitting terminal image intensifer;
PD
k In, iWhen being in k kind spontaneous emission intensity when the transmitting terminal image intensifer, wavelength is λ
iLight wave arrive the incident optical power of receiving terminal image intensifer;
L (λ
i) be that configurable website is about wavelength X to be calibrated
iWavelength dependent attenuation;
ζ
kWhen being in k kind spontaneous radiation intensity for putting when the light of making a start, the ratio of the total emergent light power that closes ripple emergent light power and all pre-configured break-through wavelength that the light of making a start is put.The unevenness of the light amplification gain spectrum of making a start under this value and the k kind spontaneous radiation intensity and all are pre-, and to demarcate the wide ratio of the total bandwidth of wavelength and image intensifer overall gain bands of a spectrum relevant, and unit is dB.ζ under the different spontaneous radiation intensity
kDiffer less than 0.2dB.
Above data can be obtained and carry out computing according to embodiment seven described methods by the method that embodiment seven provides, and repeat no more herein.
The device that the various embodiments described above provide is applicable to optical WDM communication system, is used for the WDL of the configurable website of on-line proving, so that know in real time and upgrade network state.This device has been realized the accurate on-line proving of WDL based on the cooperating of above-mentioned functions unit and module, has eliminated conventional apparatus owing to do not consider the calibrated error that the difference in attenuation of different links causes, and it is more accurate that WDL is demarcated; And, when network state changes (as changing or newly-increased passive device or again molten fine etc.), the WDL after can upgrading by this device actual measurement, and then the network state that upgrades in time.This device is not only applicable to the do not activate the service situation of wavelength of opening stage, after being applicable to again service wavelength and opening, and can demarcate based on existing network environment, need not to increase new hardware, strong adaptability, and cost is low.
Simultaneously, be understandable that, comprise that the optical WDM communication system of said apparatus is also in protection scope of the present invention.
The above only is preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (15)
1. the method for the wavelength dependent attenuation of the configurable website of on-line proving is characterized in that, described method comprises:
Obtain single ripple emergent light power of the wavelength to be calibrated of transmitting terminal image intensifer outgoing;
Described configurable website is carried out wavelength break-through configuration, make the described configurable website of light wave break-through of described wavelength to be calibrated arrive the receiving terminal image intensifer, and detect the incident optical power of the light wave that arrives the receiving terminal image intensifer;
According to single ripple emergent light power of described wavelength to be calibrated and the described incident optical power of the light wave that arrives the receiving terminal image intensifer, obtain the wavelength dependent attenuation of described wavelength to be calibrated.
2. the method for claim 1, it is characterized in that, when wavelength to be calibrated has when a plurality of, described described configurable website is carried out wavelength break-through configuration, make the described configurable website of light wave break-through of described wavelength to be calibrated arrive the receiving terminal image intensifer, and the incident optical power of the light wave of detection arrival receiving terminal image intensifer is specially:
Described configurable website is carried out repeatedly wavelength break-through configuration, each wavelength break-through configuration all is: a kind of wavelength configuration in a plurality of wavelength to be calibrated is become the described configurable website of break-through, block the described configurable website of light wave break-through of other wavelength in the described wavelength to be calibrated, and the wavelength of the light wave of each described configurable website of break-through is all not identical;
After each wavelength break-through configuration is finished, all detect the incident optical power of the light wave that arrives described receiving terminal image intensifer.
3. method as claimed in claim 1 or 2, it is characterized in that, when the unemployed affair wavelength of described configurable website exists, described according to single ripple emergent light power of described wavelength to be calibrated and the described incident optical power of the light wave that arrives the receiving terminal image intensifer, the wavelength dependent attenuation that obtains described wavelength to be calibrated is specially:
By solving an equation: L (λ
i)=P
Out(λ
i)-PD
In, iObtain described wavelength dependent attenuation,
Wherein,
L (λ
i) be that configurable website is about wavelength X to be calibrated
iWavelength dependent attenuation;
P
Out(λ
i) be described wavelength X to be calibrated
iSingle ripple emergent light power;
PD
In, iFor arriving the wavelength X described to be calibrated of receiving terminal image intensifer
iThe incident optical power of light wave.
4. method as claimed in claim 1 or 2, it is characterized in that, when described configurable website has had service wavelength to exist, described configurable website is being carried out wavelength break-through configuration, make the described configurable website of light wave break-through of described wavelength to be calibrated arrive the receiving terminal image intensifer, and also comprise before the incident optical power of the light wave of detection arrival receiving terminal image intensifer:
Detect the initial incident optical power of the light wave of described receiving terminal image intensifer reception;
Described according to single ripple emergent light power of described wavelength to be calibrated and the described incident optical power of the light wave that arrives the receiving terminal image intensifer, obtain described wavelength dependent attenuation and be specially:
By solving an equation: L (λ
i)=P
Out(λ
i)-10*log
10(10^ (0.1*PD
In, i)-10^ (0.1*PD
In0)) obtain described wavelength dependent attenuation,
Wherein,
L (λ
i) be that configurable website is about wavelength X to be calibrated
iWavelength dependent attenuation;
P
Out(λ
i) be described wavelength X to be calibrated
iSingle ripple emergent light power;
PD
In, iInclude service wavelength and wavelength X to be calibrated for what arrive the receiving terminal image intensifer
iThe incident optical power of light wave;
PD
In0Be described initial incident optical power.
5. method as claimed in claim 4 is characterized in that, the luminous power of the light wave of the wavelength to be calibrated of the described configurable website of break-through is lower than the luminous power of described service wavelength.
6. the method for the wavelength dependent attenuation of the configurable website of on-line proving is characterized in that, described method comprises:
Make the transmitting terminal image intensifer be operated in the spontaneous radiation state, and the spontaneous radiation intensity of controlling described transmitting terminal image intensifer is under a kind of spontaneous radiation intensity it;
Obtain the outgoing of described transmitting terminal image intensifer contain wavelength to be calibrated close ripple emergent light power;
Described configurable website is carried out the wavelength break-through configuration of preset times, each wavelength break-through configuration is all so that only have the described configurable website of a kind of light wave break-through of wavelength to be calibrated to arrive the receiving terminal image intensifer, block the described configurable website of light wave break-through of other wavelength, and the wavelength of the light wave of each described configurable website of break-through is all not identical; After each break-through configuration is finished, detect the incident optical power of the light wave that arrives the receiving terminal image intensifer;
Whether the change number of times of judging the spontaneous radiation intensity of described transmitting terminal image intensifer reaches preset value; If so, then be in the ripple emergent light power that closes that obtains under the various spontaneous radiation intensity according to described transmitting terminal image intensifer and determine wavelength dependent attenuation with the incident optical power of the light wave that arrives the receiving terminal image intensifer; If not, then change the spontaneous radiation intensity of transmitting terminal image intensifer, and jump to described obtain the outgoing of transmitting terminal image intensifer contain wavelength to be calibrated close ripple emergent light power, described preset value subtracts 1 more than or equal to the number of wavelength to be calibrated.
7. method as claimed in claim 6, it is characterized in that, describedly be in the incident optical power that closes ripple emergent light power and arrive the light wave of receiving terminal image intensifer that obtains under the various spontaneous radiation intensity according to described transmitting terminal image intensifer and determine that wavelength dependent attenuation is specially:
Contain n about L (λ by solution
i) the equation group of i unit linear function determine wavelength dependent attenuation;
The first linear function of described i is: 10*log
10(Σ
i10^ (0.1* (PD
k In, i+ L (λ
i))))=PD
k Out-ζ
k,
Wherein, i, k is natural number,
I=1,2,3...m, m are the number of wavelength to be calibrated; Σ
iExpression is to the optical power value summation of all wavelength to be calibrated;
k＝1，2，3...n；n≥m；
PD
k OutClose ripple emergent light power when being in k kind spontaneous emission intensity when the transmitting terminal image intensifer;
PD
k In, iWhen being in k kind spontaneous emission intensity when the transmitting terminal image intensifer, wavelength is λ
iLight wave arrive the incident optical power of receiving terminal image intensifer;
L (λ
i) be that configurable website is about wavelength X to be calibrated
iWavelength dependent attenuation;
ζ
kWhen being in k kind spontaneous emission intensity when the transmitting terminal image intensifer, the ratio of the total emergent light power that closes ripple emergent light power and all pre-configured break-through wavelength of transmitting terminal image intensifer.
8. the device of the wavelength dependent attenuation of the configurable website of on-line proving is characterized in that, described device comprises:
Acquiring unit is for single ripple emergent light power of the wavelength to be calibrated that obtains the outgoing of transmitting terminal image intensifer;
Wavelength configuration and detecting unit are used for described configurable website is carried out wavelength break-through configuration, make the described configurable website of light wave break-through of described wavelength to be calibrated arrive the receiving terminal image intensifer, and detect the incident optical power of the light wave that arrives the receiving terminal image intensifer;
Processing unit is used for obtaining the wavelength dependent attenuation of described wavelength to be calibrated according to single ripple emergent light power of described wavelength to be calibrated and the described incident optical power of the light wave that arrives the receiving terminal image intensifer.
9. device as claimed in claim 8 is characterized in that, described wavelength configuration and detecting unit comprise:
Configuration module, be used for described configurable website is carried out repeatedly wavelength break-through configuration, each wavelength break-through configuration all is: a kind of wavelength configuration in a plurality of wavelength to be calibrated is become the described configurable website of break-through, block the described configurable website of light wave break-through of other wavelength in the described wavelength to be calibrated, and the wavelength of the light wave of each described configurable website of break-through is all not identical;
Detection module is used for detecting the incident optical power of the light wave that arrives described receiving terminal image intensifer after each wavelength break-through configuration is finished.
10. install as claimed in claim 8 or 9, it is characterized in that, when the unemployed affair wavelength of described configurable website existed, described processing unit comprised:
The first computing module is used for by solving an equation: L (λ
i)=P
Out(λ
i)-PD
In, iObtain described wavelength dependent attenuation,
Wherein,
L (λ
i) be that configurable website is about wavelength X to be calibrated
iWavelength dependent attenuation;
P
Out(λ
i) be described wavelength X to be calibrated
iSingle ripple emergent light power;
PD
In, iFor arriving the wavelength X described to be calibrated of receiving terminal image intensifer
iThe incident optical power of light wave.
11. install as claimed in claim 8 or 9, it is characterized in that when described configurable website had had service wavelength to exist, described device also comprised:
The initial examination and measurement unit, the initial incident optical power of the light wave that receives for detection of described receiving terminal image intensifer;
Described processing unit comprises:
The second computing module is used for by solving an equation: L (λ
i)=P
Out(λ
i)-10*log
10(10^ (0.1*PD
In, i)-10^ (0.1*PD
In0)) obtain described wavelength dependent attenuation,
Wherein,
L (λ
i) be that configurable website is about wavelength X to be calibrated
iWavelength dependent attenuation;
P
Out(λ
i) be described wavelength X to be calibrated
iSingle ripple emergent light power;
PD
In, iInclude service wavelength and wavelength X to be calibrated for what arrive the receiving terminal image intensifer
iThe incident optical power of light wave;
PD
In0Be described initial incident optical power.
12. the device of the wavelength dependent attenuation of the configurable website of on-line proving is characterized in that, described device comprises:
The initial setting up unit is used for making the transmitting terminal image intensifer be operated in the spontaneous radiation state, and the spontaneous radiation intensity of controlling described transmitting terminal image intensifer is under a kind of spontaneous radiation intensity it;
Acquiring unit, be used for obtaining the outgoing of described transmitting terminal image intensifer contain wavelength to be calibrated close ripple emergent light power;
Wavelength configuration and detecting unit, be used for described configurable website is carried out the wavelength break-through configuration of preset times, each wavelength break-through configuration is all so that only have the described configurable website of a kind of light wave break-through of wavelength to be calibrated to arrive the receiving terminal image intensifer, block the described configurable website of light wave break-through of other wavelength, and the wavelength of the light wave of each described configurable website of break-through is all not identical; After each break-through configuration is finished, detect the incident optical power of the light wave that arrives the receiving terminal image intensifer;
Processing unit is used for judging whether the change number of times of the spontaneous radiation intensity of described transmitting terminal image intensifer reaches preset value; If so, then be in the ripple emergent light power that closes that obtains under the various spontaneous radiation intensity according to described transmitting terminal image intensifer and determine wavelength dependent attenuation with the incident optical power of the light wave that arrives the receiving terminal image intensifer; If not, then change the spontaneous radiation intensity of transmitting terminal image intensifer, and jump to described obtain the outgoing of transmitting terminal image intensifer contain wavelength to be calibrated close ripple emergent light power, described preset value subtracts 1 more than or equal to the number of wavelength to be calibrated.
13. device as claimed in claim 12 is characterized in that, described processing unit comprises:
Computing module is used for containing n about L (λ by solution
i) the equation group of i unit linear function obtain described wavelength dependent attenuation;
The first linear function of described i is: 10*log
10(Σ
i10^ (0.1* (PD
k In, i+ L (λ
i))))=PD
k Out-ζ
k,
Wherein, i, k is natural number,
I=1,2,3...m, m are the number of wavelength to be calibrated; Σ
iExpression is to the optical power value summation of all wavelength to be calibrated;
k＝1，2，3...n；n≥m；
PD
k OutClose ripple emergent light power when being in k kind spontaneous emission intensity when the transmitting terminal image intensifer;
PD
k In, iWhen being in k kind spontaneous emission intensity when the transmitting terminal image intensifer, wavelength is λ
iLight wave arrive the incident optical power of receiving terminal image intensifer;
L (λ
i) be that configurable website is about wavelength X to be calibrated
iWavelength dependent attenuation;
ζ
kWhen being in k kind spontaneous emission intensity when the transmitting terminal image intensifer, the ratio of the total emergent light power that closes ripple emergent light power and all pre-configured break-through wavelength of transmitting terminal image intensifer.
14. an optical WDM communication system is characterized in that, comprises the device of the wavelength dependent attenuation of the configurable website of each described on-line proving of claim 8 ~ 11.
15. an optical WDM communication system is characterized in that, comprises the device of the wavelength dependent attenuation of claim 12 or the configurable website of 13 described on-line provings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2012/079720 WO2014022956A1 (en) | 2012-08-06 | 2012-08-06 | Method, device and system for online calibration configurable site wavelength dependent attenuation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103004109A true CN103004109A (en) | 2013-03-27 |
| CN103004109B CN103004109B (en) | 2016-03-02 |
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|---|---|---|---|
| CN201280001396.0A Expired - Fee Related CN103004109B (en) | 2012-08-06 | 2012-08-06 | Method, the Apparatus and system of the configurable website wavelength dependent attenuation of on-line proving |
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|---|---|
| CN (1) | CN103004109B (en) |
| WO (1) | WO2014022956A1 (en) |
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| WO2014022956A1 (en) * | 2012-08-06 | 2014-02-13 | 华为技术有限公司 | Method, device and system for online calibration configurable site wavelength dependent attenuation |
| CN107104726A (en) * | 2017-03-31 | 2017-08-29 | 国网新疆电力公司信息通信公司 | The method and system of test optical fibre cables loss |
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| WO2014022956A1 (en) * | 2012-08-06 | 2014-02-13 | 华为技术有限公司 | Method, device and system for online calibration configurable site wavelength dependent attenuation |
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2012
- 2012-08-06 WO PCT/CN2012/079720 patent/WO2014022956A1/en active Application Filing
- 2012-08-06 CN CN201280001396.0A patent/CN103004109B/en not_active Expired - Fee Related
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| EP0872721A1 (en) * | 1998-02-14 | 1998-10-21 | Hewlett-Packard Company | Remote measurement of wavelength dependent information about optical components |
| CN1638213A (en) * | 2002-04-08 | 2005-07-13 | 阿尔卡特公司 | Device for measuring and dynamically compensating variations in power loss in an optical transmission line with a supervisory channel, and an associated method |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2014022956A1 (en) | 2014-02-13 |
| CN103004109B (en) | 2016-03-02 |
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