CN103004109B - Method, the Apparatus and system of the configurable website wavelength dependent attenuation of on-line proving - Google Patents
Method, the Apparatus and system of the configurable website wavelength dependent attenuation of on-line proving Download PDFInfo
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- CN103004109B CN103004109B CN201280001396.0A CN201280001396A CN103004109B CN 103004109 B CN103004109 B CN 103004109B CN 201280001396 A CN201280001396 A CN 201280001396A CN 103004109 B CN103004109 B CN 103004109B
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- 230000001419 dependent effect Effects 0.000 title claims abstract description 94
- 238000000034 method Methods 0.000 title claims abstract description 45
- 230000003287 optical effect Effects 0.000 claims abstract description 107
- 238000004891 communication Methods 0.000 claims abstract description 13
- 230000002269 spontaneous effect Effects 0.000 claims description 90
- 230000005855 radiation Effects 0.000 claims description 80
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- 238000012545 processing Methods 0.000 claims description 12
- 238000012886 linear function Methods 0.000 claims description 10
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- 238000005516 engineering process Methods 0.000 description 10
- 238000005259 measurement Methods 0.000 description 8
- 238000009434 installation Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
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Abstract
The present invention is applicable to the communications field, provides the method for the configurable website wavelength dependent attenuation of a kind of on-line proving, device and optical communication system.The method comprises: the single ripple emergent light power obtaining the wavelength to be calibrated of transmitting terminal image intensifer outgoing; Wavelength break-through configuration is carried out to configurable website, makes the configurable website of the light wave break-through of wavelength to be calibrated arrive receiving terminal image intensifer, and detect the incident optical power of the light wave arriving receiving terminal image intensifer; According to single ripple emergent light power and the incident optical power of the light wave of arrival receiving terminal image intensifer of wavelength to be calibrated, obtain the wavelength dependent attenuation of wavelength to be calibrated.The method all in network implementation stage and dilatation stage can be known in real time and upgrade WDL, and then the network state that upgrades in time, ensures the communication quality of high-quality.In addition, the present invention can realize the on-line proving of wavelength dependent attenuation completely based on existing network environment, do not need to increase any hardware, effectively control the increase of cost.
Description
Technical field
The invention belongs to the communications field, particularly relate to method, the Apparatus and system of the configurable website wavelength dependent attenuation of a kind of on-line proving.
Background technology
In optical communication network, wavelength division multiplexed network is at ROADM(reconfigurableopticaladd-dropmultiplexer, restructural type Optical Add/Drop Multiplexer) decay of website (also known as configurable website) has wavelength dependence, namely the performance of network is that wavelength is correlated with to each passage, often a website can reach 3-4dB in the decay of different wave length passage, even larger.The WDL(wavelengthdependentloss of this decay and passive device, wavelength dependent attenuation) relevant, the WDL of usual WSS (wavelengthselectiveswitch, wavelength-selective switches) accounts for leading.
Fig. 1 shows the network topology structure of ROADM website in prior art, and comprising multiple passage, each passage is all containing 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 maximum WDL of the single WSS measured in experiment is about 1.5-2dB.
With further reference to Fig. 3, for a ROADM website physical link l, this path comprises two WSS, and have transmitting terminal image intensifer 301 and receiving terminal image intensifer 302 respectively to compensate the loss of passive device and optical fiber in incidence end and exit end, the loss produced 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 usual 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 (as laser is not opened, not having optical transport in passage), usually cannot obtain the optical attenuation value of wavelength X, therefore be difficult to eliminate optical attenuation to the impact of network performance.
In order to solve the problem, in prior art, there is multiple solution.One of them is off-line calibration technology.Namely when producing by the WDL of each optical passive component of instrument (such as spectrometer) actual measurement, demarcate and record.Each in theory wavelength channel can adopt instrument accurately to measure, but in practical operation, because workload is excessive, the calibration value often measured with limited wavelength points (such as long short-and-medium each wavelength) carrys out the WDL of equivalent substitution all wavelengths, very inaccurate.In addition, this scheme cannot dynamically update WDL, can not the state of real-time update network.Such as: the optical passive component of certain website is substituted or again melts after 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 the qualification of operator with the molten fine time.With reference to figure 4, there is shown the WDL characteristic curve of molten fine point under the different molten fine time, when the molten fine time is different, its WDL is also different.In actual measurement, each molten fibre point may bring the loss of more than 0.2dB into, if this loss is unpredictable, will inevitably affect network performance.
Two of prior art does not consider the on-line proving technology of WDL.This technology does not distinguish the wavelength dependence of passage, adopts the signal light power pad value detected in the sending and receiving end of opening wavelength to carry out the decay of alternative all passages, is equivalent in fact the WDL that have ignored different passage.This scheme can be completed by webmastering software online automatically, and not needing increases extra human input.But because the decay of all wavelengths is considered as identical by this scheme, do not consider the difference in attenuation of different wave length, calibration result is inevitable very coarse, often introduces 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, makes network state more be difficult to accurately know and upgrade.
To sum up, prior art still can not carry out on-line proving accurately to the WDL of configurable website, cannot know in real time and upgrade the state of network, being unfavorable for network operation and optimization.
Summary of the invention
The object of the embodiment of the present invention is the method for the wavelength dependent attenuation providing the configurable website of a kind of on-line proving, be intended to solve the problem accurately cannot knowing the WDL of configurable website in prior art, realizing at the beginning of network is offered or after service wavelength is opened can the WDL of the configurable website of real-time update, for planning algorithm provides reliable input parameter, to provide the network service of high-quality.
On the one hand, the embodiment of the present 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;
Wavelength break-through configuration is carried out to described configurable website, makes configurable website described in the light wave break-through of described wavelength to be calibrated arrive receiving terminal image intensifer, and detect the incident optical power of the light wave arriving receiving terminal image intensifer;
According to single ripple emergent light power and the described incident optical power of the light wave of arrival receiving terminal image intensifer of described wavelength to be calibrated, obtain the wavelength dependent attenuation of described wavelength to be calibrated.
Further, when wavelength to be calibrated has multiple, described wavelength break-through configuration is carried out to described configurable website, make configurable website described in the light wave break-through of described wavelength to be calibrated arrive receiving terminal image intensifer, and the incident optical power detecting the light wave arriving receiving terminal image intensifer is specially:
Repeatedly wavelength break-through configuration is carried out to described configurable website, each wavelength break-through configures all: a kind of wavelength configuration in multiple wavelength to be calibrated is become configurable website described in break-through, configurable website described in the light wave break-through blocking other wavelength in described wavelength to be calibrated, and described in each break-through, the wavelength of the light wave of configurable website is all not identical;
After each wavelength break-through has configured, all detect the incident optical power of the light wave arriving described receiving terminal image intensifer.
Concrete, when described configurable website unemployed business wavelength exists, the described incident optical power of the light wave of described single ripple emergent light power according to described wavelength to be calibrated and arrival receiving terminal image intensifer, the wavelength dependent attenuation obtaining 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) for 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, wavelength break-through configuration is being carried out to described configurable website, make configurable website described in the light wave break-through of described wavelength to be calibrated arrive receiving terminal image intensifer, and also comprise before detecting the incident optical power of the light wave arriving receiving terminal image intensifer:
Detect the original incident luminous power of the light wave that described receiving terminal image intensifer receives;
Described single ripple emergent light power according to described wavelength to be calibrated and the described incident optical power of the light wave of arrival 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) for 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, iservice wavelength and wavelength X to be calibrated is included for what arrive receiving terminal image intensifer
ithe incident optical power of light wave;
PD
in0for described original incident luminous power.
Further, the luminous power of the light wave of the wavelength to be calibrated of configurable website described in break-through is lower than the luminous power of described service wavelength.
On the other hand, the embodiment of the present invention provides the method for the wavelength dependent attenuation of the configurable website of another kind of on-line proving, and described method comprises:
Transmitting terminal image intensifer is made to be operated in spontaneous radiation state, and under the spontaneous radiation intensity controlling described transmitting terminal image intensifer makes it be in a kind of spontaneous radiation intensity;
Obtain the conjunction ripple emergent light power containing wavelength to be calibrated of described transmitting terminal image intensifer outgoing;
Described configurable website is carried out to the wavelength break-through configuration of preset times, each wavelength break-through configuration all makes to only have configurable website described in a kind of light wave break-through of wavelength to be calibrated to arrive receiving terminal image intensifer, configurable website described in the light wave break-through blocking other wavelength, and described in each break-through, the wavelength of the light wave of configurable website is all not identical; After each break-through has configured, detect the incident optical power of the light wave arriving receiving terminal image intensifer;
Judge whether the change number of times of the spontaneous radiation intensity of described transmitting terminal image intensifer reaches preset value; If so, then the incident optical power determination wavelength dependent attenuation of the light wave of the conjunction ripple emergent light power obtained under being in various spontaneous radiation intensity according to described transmitting terminal image intensifer and arrival receiving terminal image intensifer; If not, then change the spontaneous radiation intensity of transmitting terminal image intensifer, and jump to the conjunction ripple emergent light power containing wavelength to be calibrated of described acquisition transmitting terminal image intensifer outgoing, the number that described preset value is more than or equal to wavelength to be calibrated subtracts 1.
Concrete, described be in various spontaneous radiation intensity according to described transmitting terminal image intensifer under the incident optical power determination wavelength dependent attenuation of the conjunction ripple emergent light power that obtains and the light wave that arrives receiving terminal image intensifer be specially:
By separating containing n about L (λ
i) i unit linear function equation group determination wavelength dependent attenuation;
Described 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 are natural number,
I=1,2,3...m, m are the number of wavelength to be calibrated; Σ
irepresent and the optical power value of all wavelength to be calibrated is sued for peace;
k＝1，2，3...n；n≥m；
PD
k outfor being in conjunction ripple emergent light power during kth kind spontaneous emission intensity when transmitting terminal image intensifer;
PD
k in, iduring for being in kth kind spontaneous emission intensity when transmitting terminal image intensifer, wavelength is λ
ilight wave arrive the incident optical power of receiving terminal image intensifer;
L (λ
i) for configurable website is about wavelength X to be calibrated
iwavelength dependent attenuation;
ζ
kduring for being in kth kind spontaneous emission intensity when transmitting terminal image intensifer, the ratio of the conjunction ripple emergent light power of transmitting terminal image intensifer and total emergent light power of all pre-configured break-through wavelength.
Another aspect, the embodiment of the present invention provides the device of the wavelength dependent attenuation of the configurable website of a kind of on-line proving, and described device comprises:
Acquiring unit, for obtaining single ripple emergent light power of the wavelength to be calibrated of transmitting terminal image intensifer outgoing;
Wavelength configuration and detecting unit, for carrying out wavelength break-through configuration to described configurable website, making configurable website described in the light wave break-through of described wavelength to be calibrated arrive receiving terminal image intensifer, and detecting the incident optical power of the light wave arriving receiving terminal image intensifer;
Processing unit, for the described incident optical power according to single ripple emergent light power of described wavelength to be calibrated and the light wave of arrival receiving terminal image intensifer, obtains the wavelength dependent attenuation of described wavelength to be calibrated.
Further, described wavelength configuration and detecting unit comprise:
Configuration module, for carrying out repeatedly wavelength break-through configuration to described configurable website, each wavelength break-through configures all: a kind of wavelength configuration in multiple wavelength to be calibrated is become configurable website described in break-through, configurable website described in the light wave break-through blocking other wavelength in described wavelength to be calibrated, and described in each break-through, the wavelength of the light wave of configurable website is all not identical;
Detection module, for after each wavelength break-through has configured, has detected the incident optical power of the light wave arriving described receiving terminal image intensifer.
Concrete, when described configurable website unemployed business wavelength exists, described processing unit comprises:
First computing module, for by solving an equation: L (λ
i)=P
out(λ
i)-PD
in, iobtain described wavelength dependent attenuation,
Wherein,
L (λ
i) for 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 device has also comprised:
Initial examination and measurement unit, for detecting the original incident luminous power of the light wave that described receiving terminal image intensifer receives;
Described processing unit comprises:
Second computing module, 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) for 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, iservice wavelength and wavelength X to be calibrated is included for what arrive receiving terminal image intensifer
ithe incident optical power of light wave;
PD
in0for described original incident luminous power.
Another aspect, the embodiment of the present invention provides a kind of optical WDM communication system, comprises the device of the wavelength dependent attenuation of the configurable website of above-mentioned on-line proving.
Again on the one hand, the embodiment of the present invention provides the device of the wavelength dependent attenuation of the configurable website of another kind of on-line proving, described device comprises: initial setting up unit, for making transmitting terminal image intensifer be operated in spontaneous radiation state, and under the spontaneous radiation intensity controlling described transmitting terminal image intensifer makes it be in a kind of spontaneous radiation intensity;
Acquiring unit, for obtaining the conjunction ripple emergent light power containing wavelength to be calibrated of described transmitting terminal image intensifer outgoing;
Wavelength configuration and detecting unit, for carrying out the wavelength break-through configuration of preset times to described configurable website, each wavelength break-through configuration all makes to only have configurable website described in a kind of light wave break-through of wavelength to be calibrated to arrive receiving terminal image intensifer, configurable website described in the light wave break-through blocking other wavelength, and described in each break-through, the wavelength of the light wave of configurable website is all not identical; After each break-through has configured, detect the incident optical power of the light wave arriving receiving terminal image intensifer;
Processing unit, whether the change number of times for the spontaneous radiation intensity judging described transmitting terminal image intensifer reaches preset value; If so, then the incident optical power determination wavelength dependent attenuation of the light wave of the conjunction ripple emergent light power obtained under being in various spontaneous radiation intensity according to described transmitting terminal image intensifer and arrival receiving terminal image intensifer; If not, then change the spontaneous radiation intensity of transmitting terminal image intensifer, and jump to the conjunction ripple emergent light power containing wavelength to be calibrated of described acquisition transmitting terminal image intensifer outgoing, the number that described preset value is more than or equal to wavelength to be calibrated subtracts 1.
Further, described processing unit comprises:
Computing module, for individual about L (λ by separating containing n
i) i unit linear function equation group obtain described wavelength dependent attenuation;
Described 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 are natural number,
I=1,2,3...m, m are the number of wavelength to be calibrated; Σ
irepresent and the optical power value of all wavelength to be calibrated is sued for peace;
k＝1，2，3...n；n≥m；
PD
k outfor being in conjunction ripple emergent light power during kth kind spontaneous emission intensity when transmitting terminal image intensifer;
PD
k in, iduring for being in kth kind spontaneous emission intensity when transmitting terminal image intensifer, wavelength is λ
ilight wave arrive the incident optical power of receiving terminal image intensifer;
L (λ
i) for configurable website is about wavelength X to be calibrated
iwavelength dependent attenuation;
ζ
kduring for being in kth kind spontaneous emission intensity when transmitting terminal image intensifer, the ratio of the conjunction ripple emergent light power of transmitting terminal image intensifer and total emergent light power of all pre-configured break-through wavelength.
Again on the one hand, the embodiment of the present 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.
The embodiment of the present invention is by carrying out wavelength break-through configuration to configurable website, make the light wave of the wavelength to be calibrated configurable website of break-through one by one, and combination is made a start, light puts the luminous power detection of putting with receiving end light, determines the wavelength dependent attenuation that the light wave of wavelength to be calibrated occurs 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, to know and to upgrade the wavelength dependent attenuation of each passage in real time, for planning algorithm provides reliable input parameter.In addition, because the method can calibrate the wavelength dependent attenuation of each physical link, can not be looked it by equivalent for different links, therefore its with traditional off-line calibration technology with do not consider that the technology such as wavelength dependent attenuation are compared, eliminate the calibrated error brought by the difference in attenuation of different link, make the demarcation of wavelength dependent attenuation more accurate.Further, when network state changes (as changed or newly-increased passive device or again molten fine etc.), the wavelength dependent attenuation after can being upgraded by the method actual measurement, and then the network state that upgrades in time, ensure the communication quality of high-quality.In addition, the embodiment of the present invention can realize the on-line proving of wavelength dependent attenuation completely based on existing network environment, do not need to increase any hardware, effectively control the increase of cost.
Accompanying drawing explanation
Fig. 1 is the network topology structure schematic diagram of ROADM website in prior art;
Fig. 2 is the WDL curve of testing the single WSS recorded in prior art;
Fig. 3 is the physical link schematic diagram of ROADM website in prior art;
Fig. 4 is molten fine time and the WDL characteristic curve melting fine point in prior art;
Fig. 5 is the method flow diagram of the wavelength dependent attenuation of the configurable website of on-line proving that first embodiment of the invention provides; Fig. 6 is the method flow diagram of the wavelength dependent attenuation of the configurable website of on-line proving that third embodiment of the invention provides;
Fig. 7 is the method flow diagram of the wavelength dependent attenuation of the configurable website of on-line proving that fourth embodiment of the invention provides;
Fig. 8 is the method flow diagram of the wavelength dependent attenuation of the configurable website of on-line proving that fifth embodiment of the invention provides;
Fig. 9 is the method flow diagram of the wavelength dependent attenuation of the configurable website of on-line proving that sixth embodiment of the invention provides;
Figure 10 is the method flow diagram of the wavelength dependent attenuation of the configurable website of on-line proving that seventh embodiment of the invention provides;
Figure 11 be the present invention the 8th, nine, ten, the installation drawing of the wavelength dependent attenuation of the configurable website of on-line proving that provides of 11 embodiments;
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 object of the present invention, technical scheme and advantage clearly understand, 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, be 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, illustrate only part related to the 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 comprising wavelength to be calibrated.This light wave can be complex wave (including the light wave of multi-wavelength), also it can be single ripple (only comprising a kind of light wave of wavelength), wherein, complex wave can derive from the spontaneous radiation that light of making a start is put, and single ripple can be obtained by external monochromatic source (as laser or monochromatic conventional lighting sources).Stimulated radiation and spontaneous radiation are ubiquitous phenomenons in image intensifer, image intensifer utilizes stimulated radiation to realize amplifying the light signal of input, when image intensifer operationally, if do not have light signal to be input to image intensifer, then now only have spontaneous radiation in image intensifer, if there is light signal to be input to image intensifer, then now existing spontaneous radiation in image intensifer, have stimulated radiation again, only now stimulated radiation is occupied an leading position.When only having spontaneous radiation in image intensifer, image intensifer can export the light signal of various wavelength.When spontaneous radiation existing in image intensifer has again stimulated radiation, image intensifer also can export the light signal of various wavelength, and the power of only identical with the wavelength of input optical signal light signal is the power of the light signal being far longer than other wavelength.Therefore, the complex wave that can produce based on the spontaneous radiation of image intensifer in the embodiment of the present invention demarcates wavelength dependent attenuation.
The luminous power of power monitoring apparatus to the light wave of the luminous power of the light wave of the input port of image intensifer and the output port of image intensifer is generally had to monitor in existing image intensifer, but, if the light wave being input to image intensifer is complex wave, then the luminous power of power monitoring apparatus to the light wave of input port monitors what obtain is total incident optical power of complex wave, correspondingly, monitoring what obtain to the luminous power of the light wave of output port is total emergent light power of complex wave; If the light wave being input to image intensifer is single ripple, the luminous power of power monitoring apparatus to the light wave of input port monitors the incident optical power being only single ripple obtained, correspondingly, the luminous power of the light wave of output port is monitored to the emergent light power being only single ripple obtained.In existing application, what be in most cases input to image intensifer is all complex wave, in order to obtain the luminous power of each wavelength, OPM(OpticalPerformanceMonitoring can be passed through, optical property detects) device monitors releasing from light of making a start the light wave penetrated, and obtains the emergent light power of the light wave of each wavelength.It should be noted that, except OPM, anyly carry out to complex wave the device that power detection all can obtain the luminous power of each single wavelength and may be used to the present invention, the embodiment of the present invention does not limit this.In addition,
Concrete, when light of making a start put there is no external monochromatic source time, the light that can control to make a start is put and is in spontaneous radiation state, makes it give off complex wave, is then detected single ripple emergent light power of each wavelength to be calibrated in complex wave by OPM device.When light of making a start put be connected with monochromatic source time, then can be obtained single ripple of different wave length by the mode changing monochromatic source one by one, and by OPM device, the single ripple emergent light power of often kind of single ripple when light of making a start radiates be detected.
In step s 102, wavelength break-through configuration is carried out to configurable website, make the configurable website of the light wave break-through of wavelength to be calibrated arrive receiving terminal image intensifer, and detect the incident optical power of the light wave arriving receiving terminal image intensifer;
In embodiments of the present invention, after obtaining the single ripple emergent light power coming from the light wave that light of making a start is put, the configurable website of light wave break-through of wavelength to be calibrated need be configured one by one, and, after the configurable website of light wave break-through of each wavelength, all to detecting incident optical power during its arrival receiving terminal image intensifer (being called for short " receiving end light is put "), arriving the incident optical power of receiving terminal image intensifer with the light wave obtaining all wavelength to be calibrated, for determining that WDL provides data.
Wherein, incident optical power obtains by the reading that reports of the incident optical power directly inquired about receiving end light and put.This is the existing function of wavelength division multiplexed network, is not described in detail in the present embodiment.
In step s 103, according to single ripple emergent light power and the incident optical power of the light wave of arrival receiving terminal image intensifer of wavelength to be calibrated, the wavelength dependent attenuation of wavelength to be calibrated is obtained.
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 embodiment.
The embodiment of the present invention is by carrying out wavelength break-through configuration to configurable website, make the light wave of the wavelength to be calibrated configurable website of break-through one by one, and combination is made a start, light puts the luminous power detection of putting with receiving end light, determines the WDL that the light wave of wavelength to be calibrated occurs 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, to know and to upgrade the WDL of each passage in real time, for planning algorithm provides reliable input parameter.In addition, because the method can calibrate the WDL of each physical link, can not be looked it by equivalent for different links, therefore its with traditional off-line calibration technology with do not consider that the technology such as WDL are compared, eliminate the calibrated error brought by the difference in attenuation of different link, WDL is demarcated more accurate.Further, when network state changes (as changed or newly-increased passive device or again molten fine etc.), the WDL after can being upgraded by the method actual measurement, and then the network state that upgrades in time, ensure the communication quality of high-quality.In addition, the embodiment of the present invention can realize the on-line proving of WDL completely based on existing network environment, do not need to increase any hardware, effectively control the increase of cost.
embodiment two:
When needs are to multiple Wavelength calibration wavelength dependent attenuation, the embodiment of the present invention, on the basis of above-described embodiment one, provides one preferably implementation for step S102, specific as follows:
Repeatedly wavelength break-through configuration is carried out to configurable website, each wavelength break-through configures all: a kind of wavelength configuration in multiple 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 wavelength to be calibrated, and the wavelength of the light wave of each configurable website of break-through is all not identical; Further, after each wavelength break-through has configured, the incident optical power of the light wave arriving receiving terminal image intensifer has all been detected.
More specifically, said method can be implemented by following steps:
The first step, configures the configurable website of light wave break-through of a kind of wavelength in wavelength to be calibrated, and blocks the configurable website of light wave break-through of other wavelength in wavelength to be calibrated;
Second step, detects the incident optical power that this light wave arrival receiving end light is put;
3rd step, cancels the break-through configuration of this light wave;
4th step, configures the configurable website of light wave break-through of another kind of wavelength to be calibrated, and blocks the configurable website of light wave break-through of other wavelength in wavelength to be calibrated;
5th step, detects the incident optical power that this another kind of light wave arrival receiving end light is put;
6th step, cancels the break-through configuration of another kind of light wave;
……
The rest may be inferred, until complete the break-through configuration of the light wave of whole wavelength to be calibrated, and detects the incident optical power of each light wave arriving receiving terminal image intensifer.
In above process, after the detection of the break-through configuration and incident optical power that at every turn complete a kind of wavelength, 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 terminate, 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 complete the break-through configuration of all wavelength to be calibrated and the detection of incident optical power.
The embodiment of the present invention can obtain by said method the incident optical power that each wavelength to be calibrated puts at receiving end light accurately, and step is succinct, and execution speed is fast, not easily occurs error, for determining that the WDL of 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, illustrate only part related to the present embodiment.
The embodiment of the present invention to be applicable in opening stage configurable website unemployed business wavelength to be existed, and puts at light of making a start and do not have external monochromatic source but the situation being configured with OPM device, and detailed content is as follows:
In step S301, the light that makes to make a start is put and is operated in spontaneous radiation state, and under the spontaneous radiation intensity that the light that controls to make a start is put makes it be in a kind of spontaneous radiation intensity;
In step s 302, the light wave being detected each wavelength to be calibrated in the complex wave of spontaneous radiation by OPM device puts single ripple emergent light power P at light-emitting window place at light of making a start
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, P can be obtained
out(λ
1), P
out(λ
2) ... P
out(λ
m);
In step S303, configuration wavelength X
ithe configurable website of light wave break-through, block the configurable website of light wave break-through of other wavelength in wavelength to be calibrated simultaneously, and inquire about wavelength X
ilight wave arrive the incident optical power that receiving end light puts report reading PD
in, i;
In step s 304, wavelength X is cancelled
ilight wave break-through configuration;
In step S305, judge whether the number of times configuring the configurable website of Different lightwave break-through reaches preset times, is 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) for 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 that receiving end light is put
ithe incident optical power of light wave.
The embodiment of the present invention can when light of making a start put there is no external monochromatic source, detect by existing OPM device single ripple emergent light power that light of making a start puts, under not needing separately to establish the condition of the hardware such as external light source, achieve the on-line proving of WDL.
Certainly, the embodiment of the present invention light that also can be used for making a start puts the situation being provided with wideband light source, directly can 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, illustrate only part related to the present embodiment.
The embodiment of the present invention to be applicable in opening stage configurable website unemployed business wavelength to be existed, and puts at light of making a start and be circumscribed with monochromatic source and the situation of being furnished with OPM device, and detailed content is as follows:
In step S401, putting configuration one emission wavelength at light of making a start is λ
imonochromatic source, and detect by OPM device the single ripple emergent light power P of light when light of making a start radiates that this monochromatic source sends
out(λ
i);
In step S402, configuration wavelength X
ithe configurable website of light wave break-through, and inquire about that this light wave arrives the incident optical power that receiving end light puts report reading PD
in, i;
In embodiments of the present invention, can in configuration wavelength X
ithe configurable website of light wave break-through while other light waves are blocked, detect the accuracy of data to improve.
In step S403, cancel wavelength X
ilight wave break-through configuration;
In step s 404, judge whether the number of times configuring the configurable website of Different lightwave break-through reaches preset times, is 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 configuring break-through reaches preset times, external light source can be withdrawn to recover the normal work of website.
In embodiments of the present invention, monochromatic source can be specifically the monochromatic source that a kind of emission wavelength is single; The monochromatic source that also can be made up of a wide spectrum light source and a filter, when needing the light wave of certain wavelength, can obtain the monochromatic source of required wavelength by the mode changing filter.Monochromatic source in the present embodiment can adopt in above-mentioned two kinds of monochromatic sources any one.
In step S405, by separating following equation determination wavelength dependent attenuation;
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-described embodiment three.
The embodiment of the present invention is identical with the principle of above-described embodiment three, all be applicable to the configurable website of opening stage have no property business wavelength exist situation, be all detect light of making a start respectively 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 is only, embodiment three is comparatively applicable to the situation not having monochromatic source, and its emergent light is the complex wave of spontaneous radiation, needs single ripple emergent light power of the light wave being detected each wavelength to be calibrated by OPM device.And the light of making a start of the present embodiment is put and is furnished with monochromatic source, single ripple can be obtained by the mode changing monochromatic source, then detect single ripple emergent light power by OPM device.And then also can determine, the present embodiment is also applicable to the situation not being provided with OPM device, because light of making a start puts the monochromatic source of configurable different wave length, directly can put single ripple emergent light power at light-emitting window place at light of making a start by cargo tracer ripple.But the present embodiment still detects single ripple emergent light power preferably by OPM device, be 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, illustrate only part related to the present embodiment.
The embodiment of the present invention is applicable to several physical links of configurable website in the dilatation stage has had service wavelength to exist, and puts without monochromatic source at light of making a start but be configured with the situation of OPM device, and detailed content is as follows:
In step S501, maintain light of making a start and put and be in normal operating conditions, constant to control releasing the luminous power that there is the light signal of service wavelength of penetrating from light of making a start; The object of this step is in order to avoid impacting existing service wavelength.
In step S502, detect by OPM device single ripple emergent light power P that light of making a start puts each wavelength to be calibrated in the complex wave of spontaneous radiation
out(λ
i), and inquiry arrive the original incident luminous power of the light wave that receiving end light is put report reading PD
in0.
In the present embodiment, because the light wave of existing service wavelength is put through light of making a start, thus light of now making a start put in existing spontaneous radiation have stimulated radiation again, and spontaneous radiation is the light wave that can produce various wavelength, and exports from image intensifer.The spontaneous radiation of putting due to light of making a start can produce 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 light of making a start is put produces, therefore single ripple emergent light power that light of making a start puts each wavelength to be calibrated in the complex wave of spontaneous radiation in step S502, can be detected.
In embodiments of the present invention, 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 calculating wavelength dependent attenuation;
What put inquiry at receiving end light reports reading PD
in0being the incident optical power of service wavelength, is when not configuring wavelength break-through to be calibrated, and the light wave of service wavelength arrives the original incident luminous power that receiving end light is put.
In step S503, configuration wavelength X
ithe configurable website of light wave break-through, block the configurable website of light wave break-through of other wavelength in wavelength to be calibrated simultaneously, and inquiry arrive the incident optical power of the light wave that receiving end light is put report reading PD
in, i;
In embodiments of the present invention, reading PD is reported
in, icomprise service wavelength λ
jwith the wavelength X to be calibrated of configuration break-through
itotal incident optical power;
In step S504, cancel wavelength X
ibreak-through configuration;
In step S505, judge whether the number of times configuring Different lightwave break-through reaches preset times, is 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) for 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, iservice wavelength and wavelength X to be calibrated is included for what arrive receiving terminal image intensifer
ithe incident optical power of light wave;
PD
in0for original incident luminous 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 puts.
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, are all wavelength is λ
ithe incident optical power of light wave to be calibrated, therefore, the embodiment of the present invention is identical in fact with the defining method of WDL in above-described embodiment, is all determine that the difference of single ripple emergent light power and incident optical power is wavelength dependent attenuation.Difference is only: do not have service wavelength open-minded in embodiment three and four, and the light that receiving end light puts reception only comprises the wavelength configuring break-through, therefore puts at receiving end light the incident optical power that the luminous power detected is light wave to be detected.It is open-minded that configurable website in the embodiment of the present invention has service wavelength, because receiving end light is put can not distinguish wavelength to be detected and service wavelength, therefore need before configuration break-through, the original incident luminous power detecting service wavelength is put at receiving end light, and then configure light wave break-through, and detect total incident optical power, total incident optical power and original incident luminous power are subtracted each other, determines WDL.
The embodiment of the present invention can detect all WDL not opening link after service wavelength is opened, and neither affects the business opened, and also not needing increases 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, illustrate only part related to the present embodiment.
The embodiment of the present invention is applicable to several physical links of configurable website in the dilatation stage has had service wavelength to exist, and puts the situation being configured with monochromatic source and OPM device at light of making a start, and detailed content is as follows:
In step s 601, what the light wave of inquiry business wavelength arrived the original incident luminous power that receiving end light puts reports reading PD
in0;
In step S602, putting configuration one wavelength at light of making a start is λ
imonochromatic source, detect by OPM device light wave that this monochromatic source sends and release single ripple emergent light power P when penetrating through light of making a start
out(λ
i);
In step S603, configuration wavelength X
ithe configurable website of light wave break-through, and receiving end light put inquiry incident optical power report reading PD
in, i;
Report reading PD
in, icomprise the wavelength X to be calibrated of service wavelength and configuration break-through
itotal incident optical power.
In embodiments of the present invention, other light waves demarcated in light wave can be treated while the configurable website of configuration light wave break-through and block, to improve the accuracy detecting data.
In step s 604, wavelength X is cancelled
ilight wave break-through configuration;
In step s 605, judge whether the number of times configuring the configurable website of Different lightwave break-through reaches preset times, is 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 with above-described embodiment five of each physical quantity in this equation, the embodiment of the present 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 the difference of the original incident luminous power of total incident optical power and service wavelength.
In embodiments of the present invention, activate the service to not affect, the luminous power of the light wave that monochromatic light light source can be made to produce is lower than the luminous power of service wavelength signal.
Preferably, the optical power ratio of the light wave of monochromatic light light source generation has low more than the 10dB of luminous power of service wavelength signal.
Identical with in embodiment four of monochromatic external light source in the embodiment of the present 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, illustrate only part related to the present embodiment.
The embodiment of the present invention is applicable to configurable website in opening stage does not have service wavelength to exist, and light of making a start puts the situation not configuring monochromatic source and OPM device.
Put due to light of making a start and do not configure monochromatic source, also do not have OPM device, therefore cannot put at light of making a start and obtain single ripple emergent light power, and can only get conjunction ripple emergent light power, for this situation, the embodiment of the present invention provides the online calibration method of a kind of WDL.The method realizes mainly through following steps:
In step s 701, the light that makes to make a start is put and is operated in spontaneous radiation state, and under the spontaneous radiation intensity that the light that controls to make a start is put makes it be in a kind of spontaneous radiation intensity;
In step S702, obtain light of making a start and release the conjunction ripple emergent light power containing wavelength to be calibrated penetrated;
In embodiments of the present invention, the light wave that spontaneous radiation sends is complex wave, is the white light including whole wavelength to be calibrated, and the conjunction ripple emergent light power of acquisition is total emergent light power of spontaneous radiation complex wave.
In step S703, configurable website is carried out to the wavelength break-through configuration of preset times, each wavelength break-through configuration all makes to only have the configurable website of a kind of light wave break-through of wavelength to be calibrated to arrive 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 has configured, detect the incident optical power of the light wave arriving 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: the spontaneous radiation intensity changing transmitting terminal image intensifer, then jumps to step S702.
In step S705, according to light of making a start put be in various spontaneous radiation intensity under the conjunction ripple emergent light power that obtains and arrive the incident optical power determination wavelength dependent attenuation of the light wave that receiving end light is put.
In embodiments of the present invention, the number that this preset value is more than or equal to wavelength to be calibrated subtracts 1.
In embodiments of the present invention, above-mentioned conjunction ripple emergent light power and incident optical power 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 described in detail in the present embodiment.
The embodiment of the present invention can be implemented when light of making a start is put and is not provided with monochromatic source and OPM device, the incident optical power that the conjunction ripple emergent light power obtained when putting be in different spontaneous radiation intensity according to light of making a start and arrival receiving end light are put determines WDL, do not need to increase any hardware and can realize the on-line proving of WDL and network upgrades, simple to operate and do not increase hardware cost.
Further, when the change number of times of the spontaneous radiation intensity that light of making a start is put reaches preset value, wavelength dependent attenuation can be obtained 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 are natural number,
I=1,2,3...m, m are the number of wavelength to be calibrated; Σ
irepresent and the optical power value of all wavelength to be calibrated is sued for peace;
k＝1，2，3...n；n≥m；
PD
k outfor putting conjunction ripple emergent light power when being in kth kind spontaneous emission intensity when light of making a start;
PD
k in, iwhen being in kth kind spontaneous emission intensity for putting when light of making a start, wavelength is λ
ilight wave arrive the incident optical power that receiving end light puts;
L (λ
i) for configurable website is about wavelength X to be calibrated
iwavelength dependent attenuation;
ζ
kwhen being in kth kind spontaneous radiation intensity for putting when light of making a start, the ratio of total emergent light power of the conjunction ripple emergent light power that light of making a start is put and all pre-configured break-through wavelength.The total bandwidth of this value and the unevenness that light amplification gain of making a start under kth kind spontaneous radiation intensity is composed and all pre-demarcation wavelength is relevant with the wide ratio of image intensifer overall gain bands of a spectrum, and unit is dB.ζ under different spontaneous radiation intensity
kdifference is 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 different spontaneous radiation intensity
kdifference is only less than 0.2dB, therefore can make ζ
1=ζ
2=...=ζ
n, its occurrence can according to multiple ζ of prediction
kvalue determine, such as get its mean value.In practical operation, ζ
kcan be inputted voluntarily by operating personnel, also can be pre-stored within system, directly call when reality detects.
Work as ζ
kduring for precognition value, above-mentioned equation group, as n>=m, has unique solution, therefore, uniquely can determine wavelength dependent attenuation L (λ by separating above-mentioned equation group
1), L (λ
2), L (λ
3) ... L (λ
m).Be 80 for passage to be calibrated, then the light that needs to make to make a start is put and is operated at least 80 kinds of different states, and the break-through of above-mentioned configuration light wave and the process cancelling break-through are at least carried out 80*80 time.Be appreciated that and work as ζ
kduring for non-precognition value, then the light that needs to make to make a start is put and is operated at least 81 kinds of different states, i.e. n>=m+1, and the break-through of above-mentioned configuration light wave and the process cancelling break-through are at least carried out 81*80 time.The embodiment of the present 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 is put, and according to foregoing, when only having the total number of spontaneous radiation intensity to be more than or equal to the number of wavelength to be calibrated, above-mentioned equation group just has unique solution, and the number that the preset value therefore in the present embodiment need be more than or equal to wavelength to be calibrated subtracts 1.
Certainly, the deterministic process in above-mentioned steps S704 also can by judging that the total number of spontaneous radiation intensity realizes, and now, preset value need be more than or equal to the number of wavelength to be calibrated, to ensure that above-mentioned equation group has unique solution.
One of ordinary skill in the art will appreciate that, all or part of step in above-described embodiment can have been come by the hardware that program command is relevant, this program can be stored in a 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, illustrate only part related to the 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;
Wavelength configuration and detecting unit 2 carry out wavelength break-through configuration to configurable website, make the configurable website of the 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 arriving the light wave that receiving end light is put;
Processing unit 3, according to single ripple emergent light power of wavelength to be calibrated and the incident optical power arriving the light wave that receiving end light is put, obtains the wavelength dependent attenuation of wavelength to be calibrated.
In embodiments of the present invention, light of making a start puts the light wave that can send and comprise 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 light of making a start is put, and single ripple can be obtained by external monochromatic source (as laser or monochromatic conventional lighting sources).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 present invention carries out wavelength break-through configuration by wavelength configuration and detecting unit to configurable website, make the light wave of the wavelength to be calibrated configurable website of break-through one by one, and in conjunction with acquiring unit and wavelength configuration and detecting unit light of making a start to be put and receiving end light puts row 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, make the WDL can knowing and upgrade each passage after opening with service wavelength at the beginning of network is offered in real time, for planning algorithm provides reliable input parameter.With traditional off-line calibration technology with do not consider that the technology such as WDL are compared, because this device can calibrate the WDL of each physical link, can not being looked it by equivalent for different links, because this eliminating the calibrated error brought by the difference in attenuation of different link, WDL being demarcated more accurate.Further, when network state changes (as changed or newly-increased passive device or again molten fine etc.), the WDL after can being upgraded by the actual measurement of this device, and then the network state that upgrades in time, ensure 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.Configuration module 21 carries out repeatedly wavelength break-through configuration to configurable website, each wavelength break-through configures all: a kind of wavelength configuration in multiple 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 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 has configured, detected the incident optical power of the light wave arriving 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 embodiment two, repeat no more herein.
The embodiment of the present invention realizes wavelength break-through by configuration module 21 and detection module 22 and configures and detect the incident optical power that each wavelength to be calibrated puts at receiving end light, simple for structure, execution speed is fast, not easily occurs error, for determining that the WDL of configurable website provides accurate data.
embodiment ten:
The embodiment of the present invention be applicable to configurable website have no property business wavelength exist situation.Concrete, processing unit 3 can comprise the first computing module 31, for by solving an equation: L (λ
i)=P
out(λ
i)-PD
in, iobtain wavelength dependent attenuation,
Wherein,
L (λ
i) for 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 are provided by embodiment three or four obtains, and repeats no more.
The embodiment of the present invention is processed by the data of the first computing module 31 pairs of acquiring units 1 and wavelength configuration and detecting unit 2 output, accurately obtains the WDL of configurable website.
embodiment 11:
The embodiment of the present invention is applicable to the situation that configurable website has had service wavelength to exist.When configurable website has had service wavelength to exist, then receiving end light has put the light wave that the light wave received both had comprised wavelength to be detected, comprises again the light wave of service wavelength, now directly can not obtain WDL by above-mentioned first computing module 31.Therefore, the device of the wavelength dependent attenuation of the configurable website of the on-line proving in the present embodiment also comprises initial examination and measurement unit 4, is mainly used in before carrying out wavelength configuration, detect the original incident luminous power that receiving end light puts the light wave of reception.
Now, processing unit 3 comprises the second computing module 32, 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) for 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, iservice wavelength and wavelength X to be calibrated is included for what arrive receiving terminal image intensifer
ithe incident optical power of light wave;
PD
in0for original incident luminous power.
The method that above-mentioned data can provide according to embodiment five or six obtains, and repeats no more herein.
The embodiment of the present invention can detect all WDL not opening link after service wavelength is opened, and neither affects the business opened, and also not needing increases 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, illustrate only part related to the present embodiment.
The embodiment of the present invention light that is mainly applicable to make a start puts the situation not being provided with monochromatic source and OPM device.When light of making a start put be not provided with monochromatic source time, the spontaneous radiation can put by light of making a start obtains complex wave, simultaneously, put due to light of making a start and do not have OPM device, report the conjunction ripple emergent light power of reading acquisition complex wave and the receiving end light that therefore can put the luminous power of putting with receiving end light by directly inquiring about light of making a start put the incident optical power of the light wave of reception.
Concrete,
Initial setting up unit 1 light that makes to make a start is put and is operated in spontaneous radiation state, and under the spontaneous radiation intensity that the light that controls to make a start is put makes it be in a kind of spontaneous radiation intensity;
Acquiring unit 2 obtains light of making a start and releases the conjunction ripple emergent light power containing wavelength to be calibrated penetrated;
Wavelength configuration and detecting unit 3 carry out the wavelength break-through configuration of preset times to configurable website, each wavelength break-through configuration all makes to only have the configurable website of a kind of light wave break-through of wavelength to be calibrated to arrive receiving end light and puts, 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 has configured, detect the incident optical power arriving the light wave that receiving end light is put;
This wavelength configuration and detecting unit 3 can comprise configuration module and detection module with described in embodiment nine.
Whether processing unit 4 judge the to make a start change number of times of spontaneous radiation intensity that light puts reaches preset value; If so, then according to light of making a start put be in various spontaneous radiation intensity under the conjunction ripple emergent light power that obtains and arrive the incident optical power determination wavelength dependent attenuation of the light wave that receiving end light is put; If not, then change the spontaneous radiation intensity that light of making a start is put, and jump to the conjunction ripple emergent light power containing wavelength to be calibrated obtaining light releasing of making a start and penetrate, the number that this preset value is more than or equal to wavelength to be calibrated subtracts 1.
The embodiment of the present invention can when light of making a start put be not provided with monochromatic source and OPM device, the incident optical power that the conjunction ripple emergent light power obtained when putting be in different spontaneous radiation intensity according to light of making a start and arrival receiving end light are put determines WDL, do not need to increase any hardware and can realize the on-line proving of WDL and network upgrades, simple to operate and do not increase hardware cost.
Further, processing unit 4 can comprise computing module 41, for individual about L (λ by separating containing n
i) i unit linear function equation group 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 are natural number,
I=1,2,3...m, m are the number of wavelength to be calibrated; Σ
irepresent and the optical power value of all wavelength to be calibrated is sued for peace;
k＝1，2，3...n；n≥m；
PD
k outfor being in conjunction ripple emergent light power during kth kind spontaneous emission intensity when transmitting terminal image intensifer;
PD
k in, iduring for being in kth kind spontaneous emission intensity when transmitting terminal image intensifer, wavelength is λ
ilight wave arrive the incident optical power of receiving terminal image intensifer;
L (λ
i) for configurable website is about wavelength X to be calibrated
iwavelength dependent attenuation;
ζ
kwhen being in kth kind spontaneous radiation intensity for putting when light of making a start, the ratio of total emergent light power of the conjunction ripple emergent light power that light of making a start is put and all pre-configured break-through wavelength.The total bandwidth of this value and the unevenness that light amplification gain of making a start under kth kind spontaneous radiation intensity is composed and all pre-demarcation wavelength is relevant with the wide ratio of image intensifer overall gain bands of a spectrum, and unit is dB.ζ under different spontaneous radiation intensity
kdifference is less than 0.2dB.
The method that above data can be provided by embodiment seven obtains and carries out computing according to the method described in embodiment seven, repeats no more herein.
The device that the various embodiments described above provide is applicable to optical WDM communication system, for the WDL of the configurable website of on-line proving, so that know in real time and upgrade network state.This device achieves the accurate on-line proving of WDL based on the cooperating of above-mentioned functions unit and module, eliminates conventional apparatus owing to not considering the calibrated error that the difference in attenuation of different link causes, WDL is demarcated more accurate; Further, when network state changes (as changed or newly-increased passive device or again molten fine etc.), the WDL after can being upgraded by the actual measurement of this device, and then the network state that upgrades in time.This device is not only applicable to opening stage and does not activate the service the situation of wavelength, and be applicable to again after service wavelength opens, and can demarcate based on existing network environment, without the need to increasing new hardware, strong adaptability, and cost is low.
, be understandable that meanwhile, comprise the optical WDM communication system of said apparatus also in protection scope of the present invention.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. a method for the wavelength dependent attenuation of the configurable website of on-line proving, is characterized in that, described method comprises:
Transmitting terminal image intensifer is made to be operated in spontaneous radiation state, and under the spontaneous radiation intensity controlling described transmitting terminal image intensifer makes it be in a kind of spontaneous radiation intensity;
Obtain the conjunction ripple emergent light power containing wavelength to be calibrated of described transmitting terminal image intensifer outgoing;
Described configurable website is carried out to the wavelength break-through configuration of preset times, each wavelength break-through configuration all makes to only have configurable website described in a kind of light wave break-through of wavelength to be calibrated to arrive receiving terminal image intensifer, configurable website described in the light wave break-through blocking other wavelength, and described in each break-through, the wavelength of the light wave of configurable website is all not identical; After each break-through has configured, detect the incident optical power of the light wave arriving receiving terminal image intensifer; Judge whether the change number of times of the spontaneous radiation intensity of described transmitting terminal image intensifer reaches preset value; If so, then the incident optical power determination wavelength dependent attenuation of the light wave of the conjunction ripple emergent light power obtained under being in various spontaneous radiation intensity according to described transmitting terminal image intensifer and arrival receiving terminal image intensifer; If not, then change the spontaneous radiation intensity of transmitting terminal image intensifer, and jump to the conjunction ripple emergent light power containing wavelength to be calibrated of described acquisition transmitting terminal image intensifer outgoing, the number that described preset value is more than or equal to wavelength to be calibrated subtracts 1.
2. the method for claim 1, it is characterized in that, described be in various spontaneous radiation intensity according to described transmitting terminal image intensifer under the incident optical power determination wavelength dependent attenuation of the conjunction ripple emergent light power that obtains and the light wave that arrives receiving terminal image intensifer be specially:
By separating containing n about L (λ
i) i unit linear function equation group determination wavelength dependent attenuation;
Described 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 are natural number,
I=1,2,3...m, m are the number of wavelength to be calibrated; Σ
irepresent and the optical power value of all wavelength to be calibrated is sued for peace;
k＝1，2，3...n；n≥m；
PD
k outfor being in conjunction ripple emergent light power during kth kind spontaneous emission intensity when transmitting terminal image intensifer;
PD
k in, iduring for being in kth kind spontaneous emission intensity when transmitting terminal image intensifer, wavelength is λ
ilight wave arrive the incident optical power of receiving terminal image intensifer;
L (λ
i) for configurable website is about wavelength X to be calibrated
iwavelength dependent attenuation;
ζ
kduring for being in kth kind spontaneous emission intensity when transmitting terminal image intensifer, the ratio of the conjunction ripple emergent light power of transmitting terminal image intensifer and total emergent light power of all pre-configured break-through wavelength.
3. a device for the wavelength dependent attenuation of the configurable website of on-line proving, is characterized in that, described device comprises:
Initial setting up unit, for making transmitting terminal image intensifer be operated in spontaneous radiation state, and under the spontaneous radiation intensity controlling described transmitting terminal image intensifer makes it be in a kind of spontaneous radiation intensity;
Acquiring unit, for obtaining the conjunction ripple emergent light power containing wavelength to be calibrated of described transmitting terminal image intensifer outgoing;
Wavelength configuration and detecting unit, for carrying out the wavelength break-through configuration of preset times to described configurable website, each wavelength break-through configuration all makes to only have configurable website described in a kind of light wave break-through of wavelength to be calibrated to arrive receiving terminal image intensifer, configurable website described in the light wave break-through blocking other wavelength, and described in each break-through, the wavelength of the light wave of configurable website is all not identical; After each break-through has configured, detect the incident optical power of the light wave arriving receiving terminal image intensifer;
Processing unit, whether the change number of times for the spontaneous radiation intensity judging described transmitting terminal image intensifer reaches preset value; If so, then the incident optical power determination wavelength dependent attenuation of the light wave of the conjunction ripple emergent light power obtained under being in various spontaneous radiation intensity according to described transmitting terminal image intensifer and arrival receiving terminal image intensifer; If not, then change the spontaneous radiation intensity of transmitting terminal image intensifer, and jump to the conjunction ripple emergent light power containing wavelength to be calibrated of described acquisition transmitting terminal image intensifer outgoing, the number that described preset value is more than or equal to wavelength to be calibrated subtracts 1.
4. device as claimed in claim 3, it is characterized in that, described processing unit comprises:
Computing module, for individual about L (λ by separating containing n
i) i unit linear function equation group obtain described wavelength dependent attenuation;
Described 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 are natural number,
I=1,2,3...m, m are the number of wavelength to be calibrated; Σ
irepresent and the optical power value of all wavelength to be calibrated is sued for peace;
k＝1，2，3...n；n≥m；
PD
k outfor being in conjunction ripple emergent light power during kth kind spontaneous emission intensity when transmitting terminal image intensifer;
PD
k in, iduring for being in kth kind spontaneous emission intensity when transmitting terminal image intensifer, wavelength is λ
ilight wave arrive the incident optical power of receiving terminal image intensifer;
L (λ
i) for configurable website is about wavelength X to be calibrated
iwavelength dependent attenuation;
ζ
kduring for being in kth kind spontaneous emission intensity when transmitting terminal image intensifer, the ratio of the conjunction ripple emergent light power of transmitting terminal image intensifer and total emergent light power of all pre-configured break-through wavelength.
5. an optical WDM communication system, is characterized in that, comprises the device of the wavelength dependent attenuation of the configurable website of on-line proving described in claim 3 or 4.
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 |
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| Publication Number | Publication Date |
|---|---|
| CN103004109A CN103004109A (en) | 2013-03-27 |
| CN103004109B true CN103004109B (en) | 2016-03-02 |
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| 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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| 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 |
| CN101814952A (en) * | 2010-02-26 | 2010-08-25 | 电子科技大学 | Method for testing lightwave transmission characteristics in atmospheric channel |
| CN102201864A (en) * | 2011-07-08 | 2011-09-28 | 武汉光迅科技股份有限公司 | Loss testing apparatus for multi-channel optical device |
| CN102299738A (en) * | 2011-07-01 | 2011-12-28 | 华为技术有限公司 | Method for acquiring optical network link performance parameters and device thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102525420B (en) * | 2011-12-16 | 2013-07-10 | 天津大学 | Calibration method for multi-passage time domain fluorescence chromatography imaging system |
| 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 |
-
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
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN101814952A (en) * | 2010-02-26 | 2010-08-25 | 电子科技大学 | Method for testing lightwave transmission characteristics in atmospheric channel |
| CN102299738A (en) * | 2011-07-01 | 2011-12-28 | 华为技术有限公司 | Method for acquiring optical network link performance parameters and device thereof |
| CN102201864A (en) * | 2011-07-08 | 2011-09-28 | 武汉光迅科技股份有限公司 | Loss testing apparatus for multi-channel optical device |
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|---|---|
| WO2014022956A1 (en) | 2014-02-13 |
| CN103004109A (en) | 2013-03-27 |
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