CN109581094A - The estimation device of the phase-shift characterisitc of phase-shifter, method and system - Google Patents
The estimation device of the phase-shift characterisitc of phase-shifter, method and system Download PDFInfo
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Abstract
The embodiment of the present invention provides a kind of estimation device of the phase-shift characterisitc of phase-shifter, method and system, the ac signal of different DC signal and two different frequencies is loaded to phase-shifter, the multiple groups spectral line power relation obtained according to the output spectrum for loading the electrooptic modulator under different DC signals estimates phase-shift characterisitc, due to using the ac signal of two different frequencies, the spectral line of acquisition is more, accurate estimated result can be obtained under high-frequency driving signal, and the estimated result of phase-shift characterisitc is unrelated with the design structure of electrooptic modulator, in addition, the estimated result of phase-shift characterisitc is insensitive to external conditions such as temperature and couplings.
Description
Technical field
The present invention relates to field of communication technology more particularly to a kind of estimation device of the phase-shift characterisitc of phase-shifter, method and
System.
Background technique
Electrooptic modulator may be implemented high frequency electrical signal being converted to optical signal as the core component in optical communication system
Function, therefore play an important role.Mach-increasing Dare (MZ, Mach-Zehnder) type modulator is based on Mach-increasing Dare
Principle of interference, such as be made of the modulation arm (or being referred to as phase displacement arm) that beam splitting/bundling device and electric signal drive, it is electricity
One of the configuration that optical modulator generallys use.
Fig. 1 is a schematic diagram of existing single MZ type electrooptic modulator, and which schematically illustrate the single MZ structures on basis
The case where electrooptic modulator of type.As shown in Figure 1, for example, the electrooptic modulator 100 includes 1 × 2 beam splitter, 101,2 electric light
Modulation arm 102,2 × 1 bundling devices 103.It wherein, may include one or more phase-shifters 1021 in each Electro-optical Modulation arm 102.
For electrooptic modulator, the phase-shift characterisitc of phase-shifter in Electro-optical Modulation arm, i.e. phase with electric signal variation relation,
For example, phase-voltage characteristic and/or phase-current characteristics.The phase-shift characterisitc of phase-shifter is main influence electrooptic modulator performance
An important factor for, need the nonlinear degree to this relationship to be monitored and measure.
For example, measuring the phase of the phase-shifter in Electro-optical Modulation arm for the electrooptic modulator of single MZ structure shown in FIG. 1
Moving characteristic can be used following two existing method: method one, MZ electrooptic modulator unequal for brachium, in different waves
With different interference states；Therefore output optical signal can be scanned by changing the DC voltage/current on Electro-optical Modulation arm
Spectrum, be recorded under different DC voltages interfere smallest point variation, to calculate the size of phase, i.e., phase is with electricity
Pressure/electric current variation relation.Method two, the MZ electrooptic modulator equal for brachium, phase change can cause interference position
That is the variation of output power, therefore the change of output power can be investigated by changing the DC voltage/current on Electro-optical Modulation arm
Change, calculates phase-voltage/current curve.
It should be noted that the above description of the technical background be intended merely to it is convenient to technical solution of the present invention carry out it is clear,
Complete explanation, and facilitate the understanding of those skilled in the art and illustrate.Cannot merely because these schemes of the invention
Background technology part is expounded and thinks that above-mentioned technical proposal is known to those skilled in the art.
Summary of the invention
Inventors have found that above two existing method has the following problems: load is straight on the phase-shifter of electrooptic modulator
Stream signal is tested, and in practical applications, phase-shifter would operate in the driving electric signal of high frequency, therefore test obtains
Non-linear relation may not be able to be applied under high-frequency driving signal.
In addition, above two existing method depends critically upon the design structure of electrooptic modulator, for example, the above method one
Suitable for the longer asymmetric arm MZ structure of arm length difference, and the above method one and method two can not be applied simply at multiple groups
On the MZ electrooptic modulator of conjunction.
In addition, above two existing method is big by such environmental effects, for example, the variation meeting of environment temperature and local temperature
If causing the couple state of phase change and electrooptic modulator and optical fiber unstable, it can cause the inaccurate of test result
Really.
The embodiment of the present invention provides a kind of estimation device of the phase-shift characterisitc of phase-shifter, method and system, to phase-shifter plus
The ac signal for carrying different DC signal and two different frequencies, according to the electric light loaded under different DC signals
The output spectrum of modulator and the multiple groups spectral line power relation estimation phase-shift characterisitc obtained, due to using two different frequencies
The spectral line of ac signal, acquisition is more, can obtain accurate estimated result under high-frequency driving signal, and phase-shift characterisitc
Estimated result is unrelated with the design structure of electrooptic modulator, in addition, the estimated result of phase-shift characterisitc is outer to temperature and coupling etc.
Boundary's condition is insensitive.
According to a first aspect of the embodiments of the present invention, a kind of estimation device of the phase-shift characterisitc of phase-shifter, the dress are provided
Setting includes: loading unit, is used to test signal loading to the phase-shifter of electrooptic modulator, which includes can
The DC signal of variation and the first ac signal with first frequency exchange telecommunications with second with second frequency
Number；Acquiring unit is used to obtain multiple groups according to the output spectrum for loading the electrooptic modulator under different DC signals
Spectral line power relation, wherein every group of spectral line power relation is in loading the output spectrum under same DC signal
The mutual size relation of the power of multiple spectral lines；Estimation unit is used for according to the multiple groups spectral line power relation, estimation
The phase-shift characterisitc of the phase-shifter.
According to a second aspect of the embodiments of the present invention, a kind of estimating system of the phase-shift characterisitc of phase-shifter is provided, comprising: survey
Trial signal source is used to generate the test signal being loaded on the phase-shifter of electrooptic modulator, which includes direct current
Signal and the first ac signal with first frequency and the second ac signal with second frequency；Spectrometer,
For obtaining the output spectrum of the electrooptic modulator；And electronic equipment comprising first party according to an embodiment of the present invention
The estimation device of the phase-shift characterisitc of phase-shifter described in face.
According to a third aspect of the embodiments of the present invention, a kind of estimation method of the phase-shift characterisitc of phase-shifter is provided, comprising: will
It tests in signal loading to the phase-shifter of electrooptic modulator, which includes the DC signal that can change and have
First ac signal of first frequency and the second ac signal with second frequency；According to the different DC signals of load
Under the electrooptic modulator output spectrum, obtain multiple groups spectral line power relation, wherein every group of spectral line power relation is to add
Carry the mutual size relation of the power of multiple spectral lines in the output spectrum under same DC signal；According to described
Multiple groups spectral line power relation, estimates the phase-shift characterisitc of the phase-shifter.
The beneficial effects of the present invention are: the friendship of different DC signal and two different frequencies is loaded to phase-shifter
Galvanic electricity signal, the multiple groups spectral line power obtained according to the output spectrum for loading the electrooptic modulator under different DC signals close
System's estimation phase-shift characterisitc, due to using the ac signal of two different frequencies, the spectral line of acquisition is more, can drive in high frequency
Accurate estimated result is obtained under dynamic signal, and the estimated result of phase-shift characterisitc is unrelated with the design structure of electrooptic modulator, separately
Outside, the estimated result of phase-shift characterisitc is insensitive to external conditions such as temperature and couplings.
Referring to following description and accompanying drawings, only certain exemplary embodiments of this invention is disclosed in detail, specifies original of the invention
Reason can be in a manner of adopted.It should be understood that embodiments of the present invention are not so limited in range.In appended power
In the range of the spirit and terms that benefit requires, embodiments of the present invention include many changes, modifications and are equal.
The feature for describing and/or showing for a kind of embodiment can be in a manner of same or similar one or more
It uses in a other embodiment, is combined with the feature in other embodiment, or the feature in substitution other embodiment.
It should be emphasized that term "comprises/comprising" refers to the presence of feature, one integral piece, step or component when using herein, but simultaneously
It is not excluded for the presence or additional of one or more other features, one integral piece, step or component.
Detailed description of the invention
Included attached drawing is used to provide to be further understood from the embodiment of the present invention, and which constitute one of specification
Point, for illustrating embodiments of the present invention, and come together to illustrate the principle of the present invention with verbal description.Under it should be evident that
Attached drawing in the description of face is only some embodiments of the present invention, for those of ordinary skill in the art, is not paying wound
Under the premise of the property made is laborious, it is also possible to obtain other drawings based on these drawings.In the accompanying drawings:
Fig. 1 is a schematic diagram of existing single MZ type electrooptic modulator；
Fig. 2 is a schematic diagram of the estimation device of the phase-shift characterisitc of the embodiment of the present invention；
Fig. 3 is a schematic diagram of the output spectrum under the same DC signal of load of the embodiment of the present invention 1；
Fig. 4 is a schematic diagram of the estimation unit 203 of the embodiment of the present invention 1；
Fig. 5 is a schematic diagram of the estimating system of the phase-shift characterisitc of the phase-shifter of the embodiment of the present invention 2；
Fig. 6 is the schematic block diagram that the system of the electronic equipment 503 of the embodiment of the present invention 2 is constituted；
Fig. 7 is a schematic diagram of the estimation method of the phase-shift characterisitc of the phase-shifter of the embodiment of the present invention 3.
Specific embodiment
Referring to attached drawing, by following specification, aforementioned and other feature of the invention be will be apparent.In specification
In attached drawing, only certain exemplary embodiments of this invention is specifically disclosed, which show the portions that can wherein use principle of the invention
Divide embodiment, it will thus be appreciated that the present invention is not limited to described embodiments, on the contrary, the present invention includes falling into appended power
Whole modifications, modification and equivalent in the range of benefit requirement.
Embodiment 1
The embodiment of the present invention provides a kind of estimation device of the phase-shift characterisitc of phase-shifter.Fig. 2 is the phase of the embodiment of the present invention
The schematic diagram for moving the estimation device of characteristic, as shown in Fig. 2, the estimation device 200 of phase-shift characterisitc includes:
Loading unit 201 is used to test signal loading to the phase-shifter of electrooptic modulator, which includes
The DC signal that can change and the first ac signal with first frequency are exchanged with second with second frequency
Electric signal；
Acquiring unit 202 is used to be obtained according to the output spectrum for loading the electrooptic modulator under different DC signals
Obtain multiple groups spectral line power relation, wherein every group of spectral line power relation is the output spectrum in the case where loading same DC signal
In multiple spectral lines the mutual size relation of power；
Estimation unit 203 is used to estimate the phase-shift characterisitc of the phase-shifter according to the multiple groups spectral line power relation.
In the present embodiment, which can be the electrooptic modulator of various types and structure, for example, Fig. 1 institute
The electrooptic modulator for the single MZ structure shown.But the embodiment of the present invention does not limit the type of electrooptic modulator and structure
System.
As can be seen from the above embodiments, the alternating current of different DC signal and two different frequencies is loaded to phase-shifter
Signal, the multiple groups spectral line power relation obtained according to the output spectrum for loading the electrooptic modulator under different DC signals are estimated
Phase-shift characterisitc is counted, due to using the ac signal of two different frequencies, the spectral line of acquisition is more, can believe in high-frequency drive
Accurate estimated result is obtained under number, and the estimated result of phase-shift characterisitc is unrelated with the design structure of electrooptic modulator, in addition, phase
The estimated result for moving characteristic is insensitive to external conditions such as temperature and couplings.
In the present embodiment, the phase-shifter which is used to that signal loading will to be tested to electrooptic modulator, should
Test signal includes the DC signal that can change and the first ac signal with first frequency and has the second frequency
Second ac signal of rate
In the present embodiment, which can change in a certain range, for example, the electricity of the DC signal
Pressure can be 1V, 2V, 3V, 4V, 5V etc..
In the present embodiment, the first ac signal with first frequency exchanges telecommunications with second with second frequency
It number being loaded into together with the DC signal on phase-shifter for testing, the first frequency is different from second frequency, for example, this
First frequency and second frequency can use angular frequency1、ω2It indicates.
In the present embodiment, which is used for according to the electrooptic modulator loaded under different DC signals
Output spectrum, obtain multiple groups spectral line power relation, wherein every group of spectral line power relation is in the case where loading same DC signal
The output spectrum in multiple spectral lines the mutual size relation of power.
In the present embodiment, the output spectrum of the electrooptic modulator can be obtained by spectrometer, for example, passing through high-resolution
Spectrometer obtain.
In the present embodiment, which has multiple spectral lines, and multiple spectral line includes first frequency and second frequency
Intermodulation harmonic component and first frequency and/or second frequency at least one of multiplied frequency harmonic component and first frequency
And/or the fundamental component of second frequency.
Fig. 3 is a schematic diagram of the output spectrum under the same DC signal of load of the embodiment of the present invention 1.Such as Fig. 3 institute
Show, multiple spectral lines of the output spectrum include fundamental component ω1、ω2, 2 ω of multiplied frequency harmonic component1、2ω2, intermodulation harmonic component
ω2-ω1、2ω1-ω2、2ω2-ω1、ω1+ω2。
In the present embodiment, Fig. 3 is only exemplary the multiple spectral lines for illustrating output spectrum, the embodiment of the present invention it is defeated
Spectrum can also not include all spectral lines shown in Fig. 3, the part in multiple spectral lines alternatively, it is also possible to use output spectrum out
The estimation of spectral line progress phase-shift characterisitc.
In the present embodiment, when power is indicated with mW, which can be expressed as the power of each spectral line
Ratio, when power is indicated with dB, which can be expressed as the difference of the power of each spectral line.
For example, the acquiring unit 202 is obtained according to the output spectrum for loading the electrooptic modulator under different DC signals
Multiple groups power ratio or difference measured value, wherein the power ratio or difference are the bases of first frequency and/or second frequency
The ratio or difference of the power of the multiplied frequency harmonic component of the power and first frequency and/or second frequency of frequency component, and/or, the
The power of the intermodulation harmonic component of the power and first frequency and second frequency of the fundamental component of one frequency and/or second frequency
Ratio or difference.
In the present embodiment, estimation unit 203 is used to estimate the phase shift of the phase-shifter according to the multiple groups spectral line power relation
Characteristic
Hereinafter, structure to the estimation unit 203 and illustratively being illustrated to the estimation method of phase-shift characterisitc.
Fig. 4 is a schematic diagram of the estimation unit 203 of the embodiment of the present invention 1.As shown in figure 4, the estimation unit 203 wraps
It includes:
It is right respectively to be used to calculate each group nonlinear factor in preset multiple groups nonlinear factor for first computing unit 401
The theoretical value or simulation value of the multiple groups power ratio or difference under the different DC signals of load answered；
Second computing unit 402 is used to calculate the corresponding multiple groups power ratio of each group nonlinear factor or difference
The theoretical value or simulation value of value are at a distance from the measured value of the multiple groups power ratio or difference；
Determination unit 403 is used for this apart from the smallest one group of nonlinear factor as the phase shift for characterizing the phase-shifter
Nonlinear factor in the multinomial of characteristic.
In the present embodiment, which is the nonlinear system in the multinomial for the phase-shift characterisitc for characterizing the phase-shifter
Number, for example, characterizing phase-voltage relationship multinomial of the phase-shifter can be indicated with formula below (1):
Wherein,Indicate the phase of phase-shifter, V indicates the voltage being loaded on phase-shifter, c1、c2、c3Indicate one group it is non-thread
Property coefficient.
Wherein, the voltage V being loaded on phase-shifter can be indicated with formula below (2):
Wherein, VdcIndicate the DC voltage being loaded on phase-shifter, ε1Indicate the first frequency ω on phase-shifter1Exchange
The amplitude of electric signal, ε2Indicate the second frequency ω on phase-shifter2Ac signal amplitude,Indicate first frequency ω1's
Ac signal and second frequency ω2Ac signal phase difference.
In the present embodiment, which is obtained ahead of time.For example, the estimation unit 203 is also
Include:
Traversal Unit 404 is used to traverse the valued combinations comprising the nonlinear factor within a preset range, it is pre- to obtain this
If multiple groups nonlinear factor.
In the present embodiment, which can be limited according to the physical principle of device, for example, the preset range
It can be indicated with following formula (2):
0<c1<1；-0.5<c2<0；0<c3<0.1 (2)
In the present embodiment, the first computing unit 401 is non-linear for calculating each group in preset multiple groups nonlinear factor
The theoretical value or simulation value of the multiple groups power ratio or difference under the different DC signals of the corresponding load of coefficient.
For example, the first computing unit 401 can calculate the theoretical value of the power ratio according to formula below (3)-(6):
Wherein, PFUND(ω1,2) indicate first frequency ω1Fundamental component or second frequency ω2Fundamental component power,
PIMD2(ω1±ω2) indicate intermodulation harmonic component (ω1±ω2) power, PIMD3(ω1±2ω2) indicate intermodulation harmonic component
(ω1±2ω2) power, ε1Indicate the first frequency ω on phase-shifter1Ac signal amplitude, ε2It indicates on phase-shifter
Second frequency ω2Ac signal amplitude, cS1、cS2、cS3It can be indicated with formula below (7):
Wherein, c1、c2、c3Indicate one group of nonlinear factor, VdcIndicate the DC voltage being loaded on phase-shifter.
In the present embodiment, for a voltage of the DC signal being loaded on phase-shifter, by above-mentioned formula (3)-
(7) one group of power ratio can be calculatedWithAnd the unknown quantity c due to needing to find out1、c2、c3Quantity be 3, because
This, needs for the DC signal for being at least 3 different voltages to be loaded on phase-shifter respectively, obtains at least 3 groups of power ratiosWithTo calculate c1、c2、c3。
Calculating c above1、c2、c3When, it is assumed that the first frequency ω on phase-shifter1Ac signal amplitude ε1With
Two frequencies omegas2Ac signal amplitude ε2It is known.In the present embodiment, the ε1And ε2It is also possible to unknown quantity, this
When, due to unknown quantity c1、c2、c3、ε1And ε2Quantity be 5, therefore, it is necessary to will be at least the direct current telecommunications of 5 different voltages
It number is loaded on phase-shifter respectively, obtains at least 5 groups of power ratiosWithTo calculate c1、c2、c3、ε1And ε2。
In the present embodiment, the transmission spy of simulation software simulation electrooptic modulator also can be used in the first computing unit 401
Property, output spectrum is obtained, is found corresponding to c1、c2、c3Each DC signal voltage under power ratioWithI.e.
The simulation value of the power ratio.
In the present embodiment, the second computing unit 402 is for calculating the corresponding multiple groups function of each group nonlinear factor
The theoretical value or simulation value of rate ratio or difference are at a distance from the measured value of the multiple groups power ratio or difference.
For example, for each group nonlinear factor in the preset multiple groups nonlinear factor, the second computing unit 402 difference
The theoretical value or simulation value of calculating each group power ratio or difference are counted at a distance from the measured value of each group power ratio or difference
Each sum of the distance is calculated, and using the sum of the distance as the theoretical value or simulation value of the multiple groups power ratio or difference and the multiple groups
The distance of the measured value of power ratio or difference.
In the present embodiment, which is, for example, Euclidean distance or Fan Shi distance.
In the present embodiment, determination unit 403 is used for this apart from the smallest one group of nonlinear factor as the characterization phase
Move the nonlinear factor in the multinomial of the phase-shift characterisitc of device.
More than, with first frequency ω1Fundamental component or second frequency ω2Fundamental component power PFUND(ω1,2) with
Intermodulation harmonic component (ω1±ω2) power PIMD2(ω1±ω2) ratio and first frequency ω1Fundamental component function
Rate PFUND(ω1) and intermodulation harmonic component (ω1±2ω2) power PIMD3(ω1±2ω2) ratio for, to phase-shift characterisitc
Estimation procedure be illustrated.But the embodiment of the present invention is not limited to this ratio relation, can also be in multiple spectral lines
Other spectral lines between watt level relationship.
As can be seen from the above embodiments, the alternating current of different DC signal and two different frequencies is loaded to phase-shifter
Signal, the multiple groups spectral line power relation obtained according to the output spectrum for loading the electrooptic modulator under different DC signals are estimated
Phase-shift characterisitc is counted, due to using the ac signal of two different frequencies, the spectral line of acquisition is more, can believe in high-frequency drive
Accurate estimated result is obtained under number, and the estimated result of phase-shift characterisitc is unrelated with the design structure of electrooptic modulator, in addition, phase
The estimated result for moving characteristic is insensitive to external conditions such as temperature and couplings.
Embodiment 2
The embodiment of the invention also provides a kind of estimating system of the phase-shift characterisitc of phase-shifter, Fig. 5 is the embodiment of the present invention 2
Phase-shifter phase-shift characterisitc estimating system a schematic diagram.As shown in figure 5, estimating system 500 includes:
Testing source 501 is used to generate the test signal being loaded on the phase-shifter of electrooptic modulator 100, the survey
Trial signal includes that DC signal and the first ac signal with first frequency are exchanged with second with second frequency
Electric signal；
Spectrometer 502 is used to obtain the output spectrum of electrooptic modulator 100；And
Electronic equipment 503 comprising the estimation device 5031 of the phase-shift characterisitc of phase-shifter.
In the present embodiment, which includes:
DC signal source 5011 is used to generate the DC signal；
First alternating message source 5012 is used to generate first ac signal with first frequency；And
Second alternating message source 5013 is used to generate second ac signal with second frequency.
In the present embodiment, the test signal which generates is identical as the record in embodiment 1, herein
It repeats no more.
In the present embodiment, which can be various types of spectrometers, for example, high resolution spectrometer.
In the present embodiment, the estimation device 5031 and estimation device 200 described in embodiment 1 structure having the same with
Function, details are not described herein again.
In the present embodiment, which can be controlled, stored and be calculated to devices such as electrooptic modulators
Operation, for example, the electronic equipment 503 can be one of computer, server, work station etc. or these equipment or
Multiple component parts；But the embodiment of the present invention is without being limited thereto.
Fig. 6 is the schematic block diagram that the system of the electronic equipment 503 of the embodiment of the present invention 2 is constituted.As shown in fig. 6, electronics
Equipment 503 may include: processor 610 and memory 620；Memory 620 is coupled to processor 610.The wherein memory 620
Various data can be stored；The program 621 of information processing is additionally stored, and executes the program under the control of processor 610
621。
In one embodiment, the function of estimation device 5031 can be integrated into processor 610.Wherein, it handles
Device 610 can be configured as: by test signal loading to the phase-shifter of electrooptic modulator, which includes that can change
DC signal and the first ac signal with first frequency and the second ac signal with second frequency；Root
According to the output spectrum for loading the electrooptic modulator under different DC signals, multiple groups spectral line power relation is obtained, wherein every
Group spectral line power relation be the power for loading multiple spectral lines in the output spectrum under same DC signal mutually it
Between size relation；According to the multiple groups spectral line power relation, the phase-shift characterisitc of the phase-shifter is estimated.
For example, the multiple spectral line include first frequency and second frequency intermodulation harmonic component and first frequency and/or
The fundamental component of at least one of multiplied frequency harmonic component of second frequency and first frequency and/or second frequency.
For example, it is described according to the output spectrum for loading the electrooptic modulator under different DC signals, obtain multiple groups
Spectral line power relation, comprising: according to the output spectrum for loading the electrooptic modulator under different DC signals, obtain multiple groups
The measured value of power ratio or difference, wherein the power ratio or difference are the fundamental frequencies point of first frequency and/or second frequency
The ratio or difference of the power of the multiplied frequency harmonic component of the power and first frequency and/or second frequency of amount, and/or, the first frequency
The ratio of the power of the intermodulation harmonic component of the power and first frequency and second frequency of the fundamental component of rate and/or second frequency
Or difference.
For example, it is described according to the multiple groups spectral line power relation, estimate the phase-shift characterisitc of the phase-shifter, comprising: calculate
Described in multiple groups in preset multiple groups nonlinear factor under the different DC signals of the corresponding load of each group nonlinear factor
The theoretical value or simulation value of power ratio or difference；Calculate the corresponding multiple groups power ratio of each group nonlinear factor or
The theoretical value or simulation value of difference are at a distance from the measured value of the multiple groups power ratio or difference；By described apart from the smallest by one
Group nonlinear factor is as the nonlinear factor in the multinomial for the phase-shift characterisitc for characterizing the phase-shifter.
For example, the theoretical value for calculating the corresponding multiple groups power ratio of each group nonlinear factor or difference or
Simulation value is at a distance from the measured value of the multiple groups power ratio or difference, comprising: for each group nonlinear factor, described second
Computing unit calculates separately power ratio described in the theoretical value or simulation value and each group of each group power ratio or difference or difference
The distance of measured value, and each sum of the distance is calculated, and using the sum of the distance as the multiple groups power ratio or the reason of difference
By the distance of value or simulation value and the measured value of the multiple groups power ratio or difference.
For example, it is described according to the multiple groups spectral line power relation, estimate the phase-shift characterisitc of the phase-shifter, further includes:
Traversal includes the valued combinations of the nonlinear factor in preset range, obtains the preset multiple groups nonlinear factor.
In another embodiment, estimation device 5031 such as can will be estimated with 610 separate configuration of processor
Device 5031 is configured to the chip connecting with processor 610, and the function of estimation device 5031 is realized by the control of processor 610
Energy.
In addition, as shown in fig. 6, electronic equipment 503 can also include: input and output (I/O) equipment 630 etc.；Wherein, above-mentioned
Similarly to the prior art, details are not described herein again for the function of component.It is worth noting that, electronic equipment 503 is also not necessary to
Including all components shown in Fig. 6；In addition, electronic equipment 503 can also include the component being not shown in Fig. 6, Ke Yican
Examine the prior art.
As can be seen from the above embodiments, the alternating current of different DC signal and two different frequencies is loaded to phase-shifter
Signal, the multiple groups spectral line power relation obtained according to the output spectrum for loading the electrooptic modulator under different DC signals are estimated
Phase-shift characterisitc is counted, due to using the ac signal of two different frequencies, the spectral line of acquisition is more, can believe in high-frequency drive
Accurate estimated result is obtained under number, and the estimated result of phase-shift characterisitc is unrelated with the design structure of electrooptic modulator, in addition, phase
The estimated result for moving characteristic is insensitive to external conditions such as temperature and couplings.
Embodiment 3
The embodiment of the present invention also provides a kind of estimation method of the phase-shift characterisitc of phase-shifter, corresponds to the phase of embodiment 1
Move the estimation device of the phase-shift characterisitc of device.
Fig. 7 is a schematic diagram of the estimation method of the phase-shift characterisitc of the phase-shifter of the embodiment of the present invention 3, as shown in fig. 7, should
Method includes:
Step 701: by test signal loading to the phase-shifter of electrooptic modulator, which includes that can change
DC signal and the first ac signal with first frequency and the second ac signal with second frequency；
Step 702: according to the output spectrum for loading the electrooptic modulator under different DC signals, obtaining multiple groups spectral line
Power relation, wherein every group of spectral line power relation is to load multiple spectrums in the output spectrum under same DC signal
The mutual size relation of the power of line；
Step 703: according to the multiple groups spectral line power relation, estimating the phase-shift characterisitc of the phase-shifter.
In the present embodiment, the concrete methods of realizing of above-mentioned each step is identical as the record in embodiment 1, herein no longer
It repeats.
As can be seen from the above embodiments, the alternating current of different DC signal and two different frequencies is loaded to phase-shifter
Signal, the multiple groups spectral line power relation obtained according to the output spectrum for loading the electrooptic modulator under different DC signals are estimated
Phase-shift characterisitc is counted, due to using the ac signal of two different frequencies, the spectral line of acquisition is more, can believe in high-frequency drive
Accurate estimated result is obtained under number, and the estimated result of phase-shift characterisitc is unrelated with the design structure of electrooptic modulator, in addition, phase
The estimated result for moving characteristic is insensitive to external conditions such as temperature and couplings.
The embodiment of the present invention also provides a kind of computer-readable program, wherein the estimation when the phase-shift characterisitc in phase-shifter fills
Set or electronic equipment in execute described program when, described program executes computer in the measuring device or electronic equipment
The estimation method of the phase-shift characterisitc of phase-shifter described in embodiment 3.
The embodiment of the present invention also provides a kind of storage medium for being stored with computer-readable program, wherein the computer can
Reader makes computer execute phase shift described in embodiment 3 in the estimation device or electronic equipment of the phase-shift characterisitc of phase-shifter
The estimation method of the phase-shift characterisitc of device.
Estimation is executed in estimation device or electronic equipment in conjunction with the phase-shift characterisitc of the phase-shifter of description of the embodiment of the present invention
Method can be embodied directly in hardware, the software module executed by processor or both combination.For example, functional block shown in Fig. 2
One or more combinations of one or more of figure and/or functional block diagram, both can correspond to each of computer program process
A software module can also correspond to each hardware module.These software modules can correspond respectively to shown in Fig. 7 each
Step.These software modules are for example solidified using field programmable gate array (FPGA) and are realized by these hardware modules.
Software module can be located at RAM memory, flash memory, ROM memory, eprom memory, eeprom memory, post
Storage, hard disk, mobile disk, CD-ROM or any other form known in the art storage medium.One kind can be deposited
Storage media is coupled to processor, to enable a processor to from the read information, and can be written to the storage medium
Information；Or the storage medium can be the component part of processor.Pocessor and storage media can be located in ASIC.This is soft
Part module can store in a memory in the mobile terminal, also can store in the storage card that can be inserted into mobile terminal.For example,
If equipment (such as mobile terminal) is using the MEGA-SIM card of larger capacity or the flash memory device of large capacity, the software
Module is storable in the flash memory device of the MEGA-SIM card or large capacity.
One or more combinations of one or more of functional block diagram and/or functional block diagram for Fig. 2 description, can be with
It is embodied as general processor, the digital signal processor (DSP), specific integrated circuit for executing function described herein
(ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete
Hardware component or it is any appropriately combined.One or more of functional block diagram for Fig. 2 description and/or functional block diagram
One or more combinations, be also implemented as calculating the combinations of equipment, for example, the combination of DSP and microprocessor, multiple micro- places
Reason device communicates the one or more microprocessors or any other this configuration combined with DSP.
Combining specific embodiment above, invention has been described, it will be appreciated by those skilled in the art that this
A little descriptions are all exemplary, and are not limiting the scope of the invention.Those skilled in the art can be according to the present invention
Spirit and principle various variants and modifications are made to the present invention, these variants and modifications are also within the scope of the invention.
About the embodiment including above embodiments, following note is also disclosed:
It is attached 1, a kind of estimation device of the phase-shift characterisitc of phase-shifter, described device includes:
Loading unit is used to test signal loading to the phase-shifter of electrooptic modulator, which includes energy
The DC signal enough changed and the first ac signal with first frequency and the second alternating current with second frequency
Signal；
Acquiring unit is used to be obtained according to the output spectrum for loading the electrooptic modulator under different DC signals
Obtain multiple groups spectral line power relation, wherein every group of spectral line power relation is the output light in the case where loading same DC signal
The mutual size relation of the power of multiple spectral lines in spectrum；
Estimation unit is used to estimate the phase-shift characterisitc of the phase-shifter according to the multiple groups spectral line power relation.
Note 2, the device according to note 1, wherein
The multiple spectral line includes the intermodulation harmonic component and first frequency and/or the second frequency of first frequency and second frequency
The fundamental component of at least one of multiplied frequency harmonic component of rate and first frequency and/or second frequency.
Note 3, according to being attached 2 described devices, wherein
The acquiring unit obtains more according to the output spectrum for loading the electrooptic modulator under different DC signals
The measured value of group power ratio or difference, wherein the power ratio or difference are the fundamental frequencies of first frequency and/or second frequency
The ratio or difference of the power of the multiplied frequency harmonic component of the power and first frequency and/or second frequency of component, and/or, first
The ratio of the power of the intermodulation harmonic component of the power and first frequency and second frequency of the fundamental component of frequency and/or second frequency
Value or difference.
Note 4, according to device described in note 3, wherein the estimation unit includes:
It is corresponding to be used to calculate each group nonlinear factor in preset multiple groups nonlinear factor for first computing unit
Load the theoretical value or simulation value of power ratio described in the multiple groups under different DC signals or difference；
Second computing unit is used to calculate the corresponding multiple groups power ratio of each group nonlinear factor or difference
Theoretical value or simulation value at a distance from the measured value of the multiple groups power ratio or difference；
Determination unit is used for described apart from the smallest one group of nonlinear factor as the phase shift for characterizing the phase-shifter
Nonlinear factor in the multinomial of characteristic.
It is attached 5, device according to the attached note 4, wherein
For each group nonlinear factor, second computing unit calculates separately the theoretical value of each group power ratio or difference
Or simulation value is at a distance from the measured value of power ratio or difference described in each group, and calculates each sum of the distance, and by the distance
The sum of measurement as the theoretical value or simulation value of the multiple groups power ratio or difference and the multiple groups power ratio or difference
The distance of value.
It is attached 6, device according to the attached note 4, wherein the estimation unit further include:
Traversal Unit, is used to traverse the valued combinations comprising the nonlinear factor within a preset range, described in acquisition
Preset multiple groups nonlinear factor.
It is attached 7, a kind of estimating system of the phase-shift characterisitc of phase-shifter, comprising:
Testing source is used to generate the test signal being loaded on the phase-shifter of electrooptic modulator, the test signal
The first ac signal including DC signal and with first frequency and the second ac signal with second frequency；
Spectrometer is used to obtain the output spectrum of the electrooptic modulator；And
Electronic equipment comprising the estimation device of the phase-shift characterisitc of the phase-shifter according to any one of note 1-6.
Note 8, the estimating system according to note 7, wherein
The testing source includes:
DC signal source is used to generate the DC signal；
First alternating message source is used to generate first ac signal with first frequency；And
Second alternating message source is used to generate second ac signal with second frequency.
It is attached 9, a kind of estimation method of the phase-shift characterisitc of phase-shifter, comprising:
By in test signal loading to the phase-shifter of electrooptic modulator, which includes the direct current telecommunications that can change
Number and the first ac signal with first frequency and the second ac signal with second frequency；
According to the output spectrum for loading the electrooptic modulator under different DC signals, obtains multiple groups spectral line power and close
System, wherein every group of spectral line power relation is to load multiple spectral lines in the output spectrum under same DC signal
The mutual size relation of power；
According to the multiple groups spectral line power relation, the phase-shift characterisitc of the phase-shifter is estimated.
It is attached 10, according to method described in note 9, wherein
The multiple spectral line includes the intermodulation harmonic component and first frequency and/or the second frequency of first frequency and second frequency
The fundamental component of at least one of multiplied frequency harmonic component of rate and first frequency and/or second frequency.
Note 11, according to the method for 10 institute of note, wherein the electric light under the different DC signals according to load
The output spectrum of modulator obtains multiple groups spectral line power relation, comprising:
According to the output spectrum for loading the electrooptic modulator under different DC signals, obtain multiple groups power ratio or
The measured value of difference, wherein the power ratio or difference be the fundamental component of first frequency and/or second frequency power with
The ratio or difference of the power of the multiplied frequency harmonic component of first frequency and/or second frequency, and/or, first frequency and/or second
The ratio or difference of the power of the intermodulation harmonic component of the power and first frequency and second frequency of the fundamental component of frequency.
Note 12, the method according to note 11, wherein it is described according to the multiple groups spectral line power relation, estimate institute
State the phase-shift characterisitc of phase-shifter, comprising:
Calculate the different DC signals of the corresponding load of each group nonlinear factor in preset multiple groups nonlinear factor
Under multiple groups described in power ratio or difference theoretical value or simulation value；
Calculate the theoretical value or simulation value of the corresponding multiple groups power ratio of each group nonlinear factor or difference with
The distance of the measured value of the multiple groups power ratio or difference；
Using it is described apart from the smallest one group of nonlinear factor as in the multinomial for the phase-shift characterisitc for characterizing the phase-shifter
Nonlinear factor.
Note 13, the method according to note 12, wherein the calculating each group nonlinear factor is corresponding described
The theoretical value or simulation value of multiple groups power ratio or difference are at a distance from the measured value of the multiple groups power ratio or difference, packet
It includes:
For each group nonlinear factor, second computing unit calculates separately the theoretical value of each group power ratio or difference
Or simulation value is at a distance from the measured value of power ratio or difference described in each group, and calculates each sum of the distance, and by the distance
The sum of measurement as the theoretical value or simulation value of the multiple groups power ratio or difference and the multiple groups power ratio or difference
The distance of value.
Note 14, the method according to note 12, wherein it is described according to the multiple groups spectral line power relation, estimate institute
State the phase-shift characterisitc of phase-shifter, further includes:
Traversal includes the valued combinations of the nonlinear factor within a preset range, and it is non-linear to obtain the preset multiple groups
Coefficient.
Claims (10)
1. a kind of estimation device of the phase-shift characterisitc of phase-shifter, described device include:
Loading unit is used to test signal loading to the phase-shifter of electrooptic modulator, which includes that can become
The DC signal of change and the first ac signal with first frequency and the second ac signal with second frequency；
Acquiring unit is used to be obtained more according to the output spectrum for loading the electrooptic modulator under different DC signals
Group spectral line power relation, wherein every group of spectral line power relation is in loading the output spectrum under same DC signal
Multiple spectral lines the mutual size relation of power；
Estimation unit is used to estimate the phase-shift characterisitc of the phase-shifter according to the multiple groups spectral line power relation.
2. the apparatus according to claim 1, wherein
The multiple spectral line includes the intermodulation harmonic component and first frequency and/or second frequency of first frequency and second frequency
The fundamental component of at least one of multiplied frequency harmonic component and first frequency and/or second frequency.
3. device according to claim 2, wherein
The acquiring unit obtains multiple groups function according to the output spectrum for loading the electrooptic modulator under different DC signals
The measured value of rate ratio or difference, wherein the power ratio or difference are the fundamental components of first frequency and/or second frequency
Power and first frequency and/or second frequency multiplied frequency harmonic component power ratio or difference, and/or, first frequency
And/or the power of the intermodulation harmonic component of the power of the fundamental component of second frequency and first frequency and second frequency ratio or
Difference.
4. device according to claim 3, wherein the estimation unit includes:
First computing unit is used to calculate the corresponding load of each group nonlinear factor in preset multiple groups nonlinear factor
The theoretical value or simulation value of power ratio described in multiple groups under different DC signals or difference；
Second computing unit is used to calculate the reason of the corresponding multiple groups power ratio of each group nonlinear factor or difference
By value or simulation value at a distance from the measured value of the multiple groups power ratio or difference；
Determination unit is used for described apart from the smallest one group of nonlinear factor as the phase-shift characterisitc for characterizing the phase-shifter
Multinomial in nonlinear factor.
5. device according to claim 4, wherein
For each group nonlinear factor, second computing unit calculates separately the theoretical value or imitative of each group power ratio or difference
True value calculates each sum of the distance at a distance from the measured value of power ratio or difference described in each group, and by the sum of the distance
As the theoretical value or simulation value of the multiple groups power ratio or difference and the measured value of the multiple groups power ratio or difference
The distance.
6. device according to claim 4, wherein the estimation unit further include:
Traversal Unit is used to traverse the valued combinations comprising the nonlinear factor within a preset range, obtains described default
Multiple groups nonlinear factor.
7. a kind of estimating system of the phase-shift characterisitc of phase-shifter, comprising:
Testing source is used to generate the test signal being loaded on the phase-shifter of electrooptic modulator, which includes
DC signal and the first ac signal with first frequency and the second ac signal with second frequency；
Spectrometer is used to obtain the output spectrum of the electrooptic modulator；And
Electronic equipment comprising the estimation device of the phase-shift characterisitc of phase-shifter described in any one of -6 according to claim 1.
8. a kind of estimation method of the phase-shift characterisitc of phase-shifter, comprising:
Will in test signal loading to the phase-shifter of electrooptic modulator, the test signal include the DC signal that can change with
And the first ac signal with first frequency and the second ac signal with second frequency；
According to the output spectrum for loading the electrooptic modulator under different DC signals, multiple groups spectral line power relation is obtained,
Wherein, every group of spectral line power relation is in the power for loading multiple spectral lines in the output spectrum under same DC signal
Mutual size relation；
According to the multiple groups spectral line power relation, the phase-shift characterisitc of the phase-shifter is estimated.
9. according to the method described in claim 8, wherein,
The multiple spectral line includes the intermodulation harmonic component and first frequency and/or second frequency of first frequency and second frequency
The fundamental component of at least one of multiplied frequency harmonic component and first frequency and/or second frequency.
10. described according to the electric light tune loaded under different DC signals according to the method described in claim 9, wherein
The output spectrum of device processed obtains multiple groups spectral line power relation, comprising:
According to the output spectrum for loading the electrooptic modulator under different DC signals, multiple groups power ratio or difference are obtained
Measured value, wherein the power ratio or difference are the power and first of the fundamental component of first frequency and/or second frequency
The ratio or difference of the power of the multiplied frequency harmonic component of frequency and/or second frequency, and/or, first frequency and/or second frequency
Fundamental component power and first frequency and second frequency intermodulation harmonic component power ratio or difference.
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