CN106027157B - The current compensation method and optical module of optical module - Google Patents

The current compensation method and optical module of optical module Download PDF

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Publication number
CN106027157B
CN106027157B CN201610323989.9A CN201610323989A CN106027157B CN 106027157 B CN106027157 B CN 106027157B CN 201610323989 A CN201610323989 A CN 201610323989A CN 106027157 B CN106027157 B CN 106027157B
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temperature
current
compensation
point temperature
optical module
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CN106027157A (en
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鄂文晶
林青合
李刚
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Hisense Broadband Multimedia Technology Co Ltd
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Hisense Broadband Multimedia Technology Co Ltd
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B10/00Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/50Transmitters
    • H04B10/564Power control

Abstract

The present invention provides a kind of current compensation method and optical module of optical module, and this method includes:Obtain the Current Temperatures of the optical module;According to the Current Temperatures, compensation current corresponding with the Current Temperatures is searched in preset compensation ammeter, wherein, the compensation ammeter is used to record the corresponding compensation current of section point temperature of each temperature section, and the corresponding compensation current of section point temperature of each temperature section is calculated by formula MOD2=MOD1+Km × (T2 T1) × MOD to be obtained;According to the compensation current corresponding with the Current Temperatures, current compensation is carried out to the optical module.The calculated compensation current of this method institute is more nearly ideal value, the accuracy higher of current compensation, so as to ensure that the luminous power that optical module is exported in temperature change keeps stablizing.

Description

The current compensation method and optical module of optical module
Technical field
The present invention relates to optical transport technology more particularly to the current compensation methods and optical module of a kind of optical module.
Background technology
With the development of optical communication field, optical module has become device indispensable on optical transmission device.Optical module is logical Optical transmitter module inside crossing, which converts electrical signals to optical signal and is sent into optical fiber, to be transmitted.Specifically, in optical transmitter module In, modulation electric current and bias current are exported to laser, when the current value for being output to laser is more than threshold value electricity by driving chip Laser will send out optical signal when stream.Laser belongs to semiconductor devices, and the temperature of laser is higher, and threshold current is got over Greatly.In order to ensure laser output optical signal luminous power stabilization, when laser temperature increases, it is necessary to driving core The modulation electric current and bias current that piece is exported compensate.Wherein, the compensation of bias current passes through automated power control (Automatic Power Control, abbreviation APC) to realize, modulating the compensation of electric current can be modulated by establishing (Modulation, abbreviation MOD) compensation table is carried out section linear compensating, is realized using modes such as thermistors.Wherein, it establishes The mode of MOD compensation tables realizes that simple and effect is good, therefore which uses extensively.
In the prior art, it is come the specific method for carrying out section linear compensating by establishing MOD compensation table:
After laser temperature stabilization, according to the corresponding known slope K of Current Temperatures, which is multiplied by current temperature The difference of degree and debug point temperature adds the corresponding compensation current of debug point temperature, using result of calculation as Current Temperatures Corresponding compensation current.
But can only meet near room temperature debug point that offset is very accurate using existing current compensation method, more deviate Debug point region is bigger from dreamboat value deviation, causes compensation current inaccurate, and then cause optical module in temperature change When the luminous power that is exported it is unstable.
Invention content
The present invention provides a kind of current compensation method and optical module of optical module, calculated for solving prior art institute Compensate the problem of electric current inaccuracy.
First aspect present invention provides a kind of current compensation method of optical module, including:
Obtain the Current Temperatures of the optical module;
Compensation electric current corresponding with the Current Temperatures is searched in preset compensation ammeter according to the Current Temperatures Value, wherein the compensation ammeter is used to record the corresponding compensation current of section point temperature of each temperature section, Mei Gewen The corresponding compensation current of section point temperature for spending section calculates acquisition, T1 by formula MOD2=MOD1+Km × (T2-T1) × MOD With the section point temperature that T2 is two adjacent temperature sections, MOD1 is the corresponding compensation currents of T1, and MOD2 is the corresponding compensation of T2 Current value, MOD are the corresponding compensation current of debug point temperature, and Km is the section point by each temperature section of multiple sample optical modules The compensation current of temperature and the corresponding compensation current of debug point temperature of the sample optical module carry out calculating acquisition Normalization slope value;
According to the compensation current corresponding with the Current Temperatures, current compensation is carried out to the optical module.
Second aspect of the present invention provides a kind of optical module, the current compensation method for executing optical module above-mentioned.
The current compensation method and optical module of optical module provided by the present invention, using formula MOD2=MOD1+Km × (T2-T1) the section point temperature corresponding compensation current of × all temperature sections of MOD one-time calculations contains debugging in the formula The corresponding compensation current of temperature is put, and the normalization slope value generated according to the corresponding compensation current of debug point temperature, So that ideal value is more nearly according to the calculated compensation current of the formula, the accuracy higher of current compensation, to It can ensure that the luminous power that optical module is exported in temperature change keeps stablizing.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair Some bright embodiments for those of ordinary skill in the art without creative efforts, can be with root Other attached drawings are obtained according to these attached drawings.
Fig. 1 be optical module optical transmitter module in the electric current of laser, temperature and power variation relation schematic diagram;
Fig. 2 is the flow diagram of the current compensation method embodiment one of optical module provided in an embodiment of the present invention;
Fig. 3 is the flow diagram of the current compensation method embodiment two of optical module provided in an embodiment of the present invention;
Fig. 4 is the flow diagram of the current compensation method embodiment three of optical module provided in an embodiment of the present invention;
Fig. 5 is the flow diagram of the current compensation method example IV of optical module provided in an embodiment of the present invention;
Fig. 6 is the flow diagram of the current compensation method embodiment five of optical module provided in an embodiment of the present invention;
Fig. 7 is the exemplary plot of the current compensation method of optical module provided in an embodiment of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.
Fig. 1 be optical module optical transmitter module in the electric current of laser, temperature and power variation relation schematic diagram, such as scheme Shown in 1, in order to ensure the power stability of laser, need to carry out current compensation, also, with the raising of temperature, temperature it is small The variation of amplitude variation, corresponding compensation electric current all can be very big.
In the method for carrying out section linear compensating by establishing MOD compensation tables in the prior art, corresponded to according to Current Temperatures Known slopes K carry out current compensation, known slopes K passes through formulaTo calculate, wherein T1 It is respectively the section point temperature of two neighboring temperature section with T2, MOD1 is the corresponding compensation currents of T1, and MOD2 is the corresponding benefits of T2 Repay current value.Due to Optical Device Coupling etc. is convenient, the lasers of many optical modules required benefit at the same temperature Current value and unequal is repaid, when carrying out current compensation according to the slope, the compensation electric current near room temperature debug point can only be met Value is accurate, more deviates debug point, the calculated compensation current of institute and desired value deviation are bigger, therefore, use existing method pair The accuracy rate that the laser of optical module carries out current compensation is not high.
The present invention is based on the above problems, propose a kind of according to room temperature debug point temperature, the corresponding benefit of room temperature debug point temperature It repays current value and according to the calculated normalization slope value of specific formulation, generates the accurate compensation current of all temperature Method.
Fig. 2 is the flow diagram of the current compensation method embodiment one of optical module provided in an embodiment of the present invention, such as Fig. 2 Shown, temperature is divided into multiple temperature sections by this method, and this method includes:
S101, the Current Temperatures for obtaining optical module.
It is alternatively possible to which micro-control unit (Microcontroller Unit, abbreviation MCU) temperature by optical module passes Sensor gets the accurate Current Temperatures of laser.
S102, according to Current Temperatures, compensation current corresponding with Current Temperatures is searched in preset compensation ammeter.
Wherein, above-mentioned compensation ammeter is used to record the corresponding compensation current of section point temperature of each temperature section, each The corresponding compensation current of section point temperature of temperature section is calculated by formula MOD2=MOD1+Km × (T2-T1) × MOD and is obtained. Wherein, T1 and T2 is the section point temperature of two adjacent temperature sections, and MOD1 is the corresponding compensation currents of T1, and MOD2 corresponds to for T2 Compensation current, MOD is the corresponding compensation current of debug point temperature, and Km is by each temperature sections of multiple sample optical modules The corresponding compensation current of debug point temperature of compensation current and sample optical module of section point temperature carry out calculating acquisition Normalization slope value.
In the embodiment of the present invention, the temperature that optical module may be undergone is divided into several temperature sections, the temperature section of division More, then the normalization slope value obtained under full temperature is more, in turn, the corresponding compensation electricity of section point temperature of each temperature section Flow valuve is also more accurate.Temperature section division can be carried out according to the required precision of optical module.For example, the temperature that optical module may be undergone It is -40 DEG C to 80 DEG C, can be since -40 DEG C, every 5 DEG C are a temperature section, i.e., -40 DEG C to -35 DEG C are a temperature section, - 35 DEG C to -30 DEG C are temperature section etc..
Preferably, the section point temperature of each temperature section is the minimum temperature in the temperature section.For example, -40 DEG C to -35 DEG C this The section point temperature of a temperature section is -40 DEG C, and the section point temperature of -35 DEG C to -30 DEG C this temperature sections is -35 DEG C.
In this step, the section point temperature of each temperature section is calculated using formula MOD2=MOD1+Km × (T2-T1) × MOD It is the benefit for the section point temperature for calculating temperature section adjacent thereto one by one since a temperature section when corresponding compensation current Current value is repaid, the compensation current of all temperature sections is finally calculated.MOD in the formula is the corresponding compensation of debug point temperature Current value, which is preferably room temperature, and corresponding compensation current can be obtained easily, and the Km in the formula is The corresponding slope value of T1 temperature that calculated in advance goes out, Km is when calculating also using the corresponding compensation current of debug point temperature as it In a parameter.The compensation current of debug point temperature is taken into account when calculating compensation current and generates a new meter Formula is calculated, according to this calculation formula calculated compensation current of institute compared to using the calculated compensation electricity of prior art institute Flow valuve is more nearly ideal value, i.e. the accuracy higher of current compensation.
It, can be by the temperature after calculating the corresponding compensation current of section point temperature of some temperature section according to above-mentioned formula The corresponding compensation current of section point temperature of section is written in above-mentioned compensation ammeter, and all temperature are had recorded in the compensation ammeter The compensation current of the section point temperature of section, which is stored in the specific storage unit of optical module, optical mode is worked as When the laser temperature of block changes, directly the compensation ammeter is inquired according to Current Temperatures and can be obtained Current Temperatures correspondence Compensation current.
In turn, the compensation current obtained is written in the MOD registers of driving chip of optical transmitter module, drives core Piece reads current value from MOD registers, and the conversion of line number of going forward side by side word modules is output to form modulation circuit in laser, So that the optical signal output power of laser keeps stablizing.
S103, basis compensation current corresponding with the Current Temperatures, current compensation is carried out to optical module.
In the present embodiment, formula MOD2=MOD1+Km × all temperature sections of (T2-T1) × MOD one-time calculations are used Section puts the corresponding compensation current of temperature, contains the corresponding compensation current of debug point temperature in the formula, and according to tune The normalization slope value that the corresponding compensation current of pilot temperature generates, so that according to the calculated compensation electric current of the formula Value is more nearly ideal value, the accuracy higher of current compensation, so as to ensure what optical module was exported in temperature change Luminous power keeps stablizing.
On the basis of the above embodiments, the present embodiment is related to counting using formula MOD2=MOD1+Km* (T2-T1) * MOD Calculate the specific method of the corresponding compensation current of section point temperature of each temperature section, that is, Fig. 3 is light provided in an embodiment of the present invention The flow diagram of the current compensation method embodiment two of module, as shown in figure 3, passing through formula MOD2 in above-mentioned steps S102 =MOD1+Km × (T2-T1) × MOD, which is calculated, to be obtained the corresponding compensation current of section point temperature of each temperature section and includes:
S201, debug point temperature and the corresponding compensation current of debug point temperature are determined.
As previously shown, debug point temperature is preferably room temperature, detects room temperature and determines that the compensation current under room temperature is all held It easily realizes and result is accurate.According to actual needs, can be 32 DEG C, the room temperature such as 30 DEG C by debug point temperature setting.
Specifically, the height on the micro-control unit (MicroController Unit, abbreviation MCU) of optical module can be passed through Whether accuracy temperature sensor is room temperature come the temperature for detecting optical module, and the host computer by being connect with MCU is come temperature Whether stablize.After temperature is stably held in debug point temperature, debug point is determined using equipment such as eye pattern instrument and Error Detectors The corresponding compensation current of temperature.
S202, according to above-mentioned debug point temperature and the corresponding compensation current of debug point temperature, respectively use formula MOD2=MOD1+Km* (T2-T1) * MOD calculate compensation electricity corresponding less than the section point temperature of all temperature sections of debug point temperature Flow valuve, and the corresponding compensation current of section point temperature more than all temperature sections of debug point temperature.
The applicable temperature range of the embodiment of the present invention is big, in specific calculate, using debug point temperature as basic point, first counts one by one The compensation current that temperature is less than all sections of point temperature of debug point temperature one end is calculated, then calculates be more than debug point temperature one one by one The compensation current of all sections of point temperature at end.Because the result of debug point temperature and its corresponding compensation current is accurate, because This, using the accuracy rate of the compensation current of debug point temperature other each section of point temperature calculated as basic point also higher.
On the basis of the above embodiments, the present embodiment is related to using formula MOD2=MOD1+Km* (T2-T1) * respectively MOD calculates the corresponding compensation current of section point temperature of all temperature sections less than debug point temperature, and is more than debug point temperature A kind of specific method of the corresponding compensation current of section point temperature of all temperature sections of degree, that is, Fig. 4 carries for the embodiment of the present invention The flow diagram of the current compensation method embodiment three of the optical module of confession, as shown in figure 4, a kind of implementation of above-mentioned steps S202 Mode is:
S301, using debug point temperature as T1 formula is used using the corresponding compensation current of debug point temperature as MOD1 MOD2=MOD1+Km* (T2-T1) * MOD, which are calculated, is less than debug point temperature, and adjacent with temperature section where debug point temperature The corresponding compensation current MOD2 of section point temperature of temperature section, wherein T2 is less than T1.
That is, according to debug point temperature and its compensation electric current, first section point temperature less than debug point temperature is calculated first The compensation current of degree.Wherein, T1 is debug point temperature, and MOD1 is the corresponding compensation currents of T1, and T2 is less than debug point temperature First section point temperature of degree, Km are the normalization slope value of the temperature section where first section point temperature, are plugged these values into In above-mentioned formula, the corresponding compensation current of first section point temperature is calculated.
S302, using MOD2 as new MOD1, T2 formula MOD2=MOD1+Km* (T2-T1) * is used as new T1 MOD calculates new MOD2.
It should be noted that every time calculate when Km all refer to the temperature section that temperature is small in adjacent temperature section normalization it is oblique The normalization slope value of temperature section where rate value, i.e. T2.
S303, cycle execute step S302, until T2 is minimum temperature.
After calculating the compensation current less than first section point temperature of debug point temperature, and as base Point reuses the compensation current that above-mentioned formula calculates next section of point temperature, and so on, it continues on new calculated Compensation current and above-mentioned formula calculate the compensation current of remaining section of point temperature, and when T2 is minimum temperature, explanation is less than The compensation current of all sections of point temperature of debug point temperature, which all calculates, to be finished, then stops calculating.
By above-mentioned cycle calculations to get corresponding to the section point temperature for all temperature sections for being less than debug point temperature Compensation current.
On the basis of the above embodiments, the present embodiment is related to using formula MOD2=MOD1+Km* (T2-T1) * respectively MOD calculates the corresponding compensation current of section point temperature of all temperature sections less than debug point temperature, and is more than debug point temperature Another specific method of the corresponding compensation current of section point temperature of all temperature sections of degree, that is, Fig. 5 is the embodiment of the present invention The flow diagram of the current compensation method example IV of the optical module of offer, as shown in figure 5, the another kind of above-mentioned steps S202 Embodiment is:
S401, using debug point temperature as T1, using the corresponding compensation current of debug point temperature as MOD1, by debug point The normalization slope value of temperature section where temperature is calculated big as Km using formula MOD2=MOD1+Km* (T2-T1) * MOD In debug point temperature, and the corresponding compensation current of adjacent with temperature section where the debug point temperature section point temperature of temperature section MOD2, wherein T2 is more than T1.
That is, according to debug point temperature and its compensation electric current, first section point temperature more than debug point temperature is calculated first The compensation current of degree.Wherein, T1 is debug point temperature, and MOD1 is the corresponding compensation currents of T1, and T2 is less than debug point temperature First section point temperature of degree, Km are the normalization slope value of the temperature section where debug point temperature, are plugged these values into above-mentioned In formula, the corresponding compensation current of first section point temperature is calculated.
S402, using MOD2 as new MOD1, T2 formula MOD2=MOD1+Km* (T2-T1) * is used as new T1 MOD calculates new MOD2.
It should be noted that every time calculate when Km all refer to the temperature section that temperature is small in adjacent temperature section normalization it is oblique The normalization slope value of temperature section where rate value, i.e. T1.
S403, cycle execute step S402, until T2 is maximum temperature.
After calculating the compensation current more than first section point temperature of debug point temperature, and as base Point reuses the compensation current that above-mentioned formula calculates next section of point temperature, and so on, it continues on new calculated Compensation current and above-mentioned formula calculate the compensation current of remaining section of point temperature, and when T2 is maximum temperature, explanation is more than The compensation current of all sections of point temperature of debug point temperature, which all calculates, to be finished, then stops calculating.
By above-mentioned cycle calculations to get corresponding to the section point temperature for all temperature sections for being more than debug point temperature Compensation current.
On the basis of the above embodiments, the present embodiment is related to determining the specific side of the normalization slope value of each temperature section Method, that is, Fig. 6 is the flow diagram of the current compensation method embodiment five of optical module provided in an embodiment of the present invention, such as Fig. 6 institutes Show, before abovementioned steps S102, further includes:
S501, acquire preset quantity sample optical module in the section point temperature of each temperature section corresponding compensation electric current Value.
Specifically, host computer can be connect with multiple sample optical modules, then passes through light power meter, eye pattern instrument and error code The equipment such as instrument acquire the compensation current of all sections of point temperature of multiple sample optical modules.
S502, according to formulaDetermine the oblique of each temperature section of each sample optical module Rate value.
Wherein, T1 and T2 is the section point temperature of two adjacent temperature sections, and MOD1' and MOD2' are in each sample optical module Compensation current corresponding to the section point temperature of two adjacent temperature sections, MOD' are debug point temperature pair in each sample optical module The compensation current answered.
In this step, for each sample optical module, according to the compensation electric current of aforementioned collected all sections of points temperature Value all calculates the slope value of section point using above-mentioned formula, it is also contemplated that the compensation current of debug point temperature in the formula. It is more nearly ideal value using the calculated slope value of formula institute, to ensure the accuracy higher of subsequent current compensation.
S503, calculation processing is carried out to the slope value of each temperature section of each sample optical module, obtains each temperature section Normalization slope value.
By above-mentioned calculating, the slope value of each temperature section of each sample optical module can be obtained, due to each sample Slope value of the optical module on the same temperature section may and differ, and therefore, it is necessary to the Different Slope in same temperature section Value is handled.For example, therefrom selecting maximum either minimum slope value as the normalization slope of the temperature section or pressing It is calculated etc. according to certain weight.
And a kind of preferred computational methods are:
The average value for calculating slope value of all sample optical modules on each temperature section, using the average value as each The normalization slope value of temperature section.
The computational methods are simple and quick, and calculated average value can more represent the universal slope value of optical module.
In another embodiment, in above-mentioned steps S102, searched in preset compensation ammeter according to Current Temperatures When compensation current corresponding with Current Temperatures, if compensation current cannot directly be found, i.e., if optical module it is current Temperature is between the section point temperature of two adjacent temperature sections, then according to formula a+ (b-a) * delta/2 or formula a- (a-b) * Delta/2 calculates the corresponding compensation current of Current Temperatures, wherein two respectively adjacent with Current Temperatures a and b section point temperature Spend corresponding compensation current, delta is the remainder of the first temperature and the first difference, wherein the first temperature be Current Temperatures and The sum of preset minimum temperature, the first difference are the difference of the two section point temperature adjacent with Current Temperatures.
By the above method it is calculated be all each section of point temperature compensation current, in actual use, if The Current Temperatures of optical module are not wherein some section point temperature, but the temperature between two section point temperature, then according to section point The compensation current of temperature carries out interpolation arithmetic acquisition.Specifically, it if b is more than a, is counted using formula a+ (b-a) * delta/2 Calculate the corresponding current offset values of the Current Temperatures;If a is more than b, calculated using formula a- (a-b) * delta/2 described current The corresponding current offset values of temperature.
For example, it is assumed that the difference between each section of point temperature is 2 DEG C, i.e. MOD compensates every 2 DEG C of one lattice in table.Assuming that MOD is compensated Minimum temperature is -40 DEG C in table, and -40 DEG C of corresponding compensation currents are X1, and -38 DEG C of corresponding compensation currents are X2, -36 DEG C Corresponding compensation current is X3, X3>X2, Current Temperatures are -37 DEG C, then the first temperature is -37 DEG C of Current Temperatures and lowest temperature Degree and -40 DEG C, be -3 DEG C, delta be 2 DEG C of the first temperature and temperature gap remainder use formula a+ according to these values (b-a) * delta/2 are calculated (wherein, a X2, b X3), you can obtain the compensation current of 37 DEG C of Current Temperatures.
Fig. 7 is the exemplary plot of the current compensation method of optical module provided in an embodiment of the present invention, as shown in fig. 7, comprises three A temperature section, respectively temperature section 1, temperature section 2 and temperature section 3.Wherein, the section point temperature of temperature section 1 is 20 DEG C, compensates electric current It is 40, as shown in A points in Fig. 7;The section point temperature of temperature section 2 is 30 DEG C, and compensation electric current is 50, as shown in B points in Fig. 7;Temperature The section point temperature of section 3 is 40 DEG C, and compensation electric current is 70, as shown in C points in Fig. 7.Assuming that debug point is A, debug point temperature is 20 DEG C, then the corresponding compensation current of debug point temperature is 40.Then, using the formula of the prior art With the formula for using the embodiment of the present inventionCalculated temperature section 1 and temperature section 2 slope Shown in table 1:
Table 1
Temperature section 1 Temperature section 2
K 1 2
Km 1/40 1/20
Due in terms of the coupling of module optical assembly, needs compensation current that must be expanded to 2 times of original ability and reach To requirement, i.e. the compensation current of A points needs the compensation current for reaching 80, B points to need the compensation current for reaching 100, C points It needs to reach 140.
If using the method for the prior art, the formula difference of the compensation current of B points and C points is calculated based on debug point A For:
B points:80+1* (30-20)=90
C points:90+2* (40-30)=110
It will be apparent that using the prior art method calculated compensation current and actual needs ideal value deviation very Greatly.
And if the method provided using the embodiment of the present invention, the compensation electric current of B points and C points is calculated based on debug point A The formula of value is respectively:
B points:80+1/40*80* (30-20)=100
C points:100+1/20*80* (40-30)=140
As can be seen that using the embodiment of the present invention method calculated compensation current and actual needs ideal value Unanimously, that is, compared with the prior art, the accuracy rate of compensation current can be significantly improved using the method for the embodiment of the present invention, Ensure the stabilization for the power that optical module is exported in temperature change.
The embodiment of the present invention also provides a kind of optical module, which realizes for executing embodiment of the method above-mentioned Principle is similar with technique effect, and details are not described herein again.
One of ordinary skill in the art will appreciate that:Realize that all or part of step of above-mentioned each method embodiment can lead to The relevant hardware of program instruction is crossed to complete.Program above-mentioned can be stored in a computer read/write memory medium.The journey When being executed, execution includes the steps that above-mentioned each method embodiment to sequence;And storage medium above-mentioned includes:ROM, RAM, magnetic disc or The various media that can store program code such as person's CD.
Finally it should be noted that:The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations;To the greatest extent Present invention has been described in detail with reference to the aforementioned embodiments for pipe, it will be understood by those of ordinary skill in the art that:Its according to So can with technical scheme described in the above embodiments is modified, either to which part or all technical features into Row equivalent replacement;And these modifications or replacements, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution The range of scheme.

Claims (9)

1. a kind of current compensation method of optical module, which is characterized in that temperature is divided into multiple temperature sections by the method, described Method includes:
Obtain the Current Temperatures of the optical module;
According to the Current Temperatures, compensation current corresponding with the Current Temperatures is searched in preset compensation ammeter, Wherein, the compensation ammeter is used to record the corresponding compensation current of section point temperature of each temperature section, each temperature The corresponding compensation current of section point temperature of section is calculated by formula MOD2=MOD1+Km × (T2-T1) × MOD and is obtained, T1 and T2 is the section point temperature of two adjacent temperature sections, and MOD1 is the corresponding compensation currents of T1, and MOD2 is the corresponding compensation electricity of T2 Flow valuve, MOD are the corresponding compensation current of debug point temperature, and Km is the section point temperature by each temperature section of multiple sample optical modules The compensation current of degree and the corresponding compensation current of debug point temperature of the sample optical module carry out calculating returning for acquisition One changes slope value;
According to the compensation current corresponding with the Current Temperatures, current compensation is carried out to the optical module.
2. according to the method described in claim 1, it is characterized in that, the corresponding compensation electricity of the section point temperature of each temperature section Flow valuve is calculated by formula MOD2=MOD1+Km × (T2-T1) × MOD and is obtained, including:
Determine debug point temperature and the corresponding compensation current of debug point temperature;
According to the debug point temperature and the corresponding compensation current of the debug point temperature, formula MOD2=is used respectively MOD1+Km* (T2-T1) * MOD calculate the corresponding compensation electric current of section point temperature of all temperature sections less than the debug point temperature Value, and more than the corresponding compensation current of section point temperature of all temperature sections of the debug point temperature.
3. according to the method described in claim 2, it is characterized in that, described according to the debug point temperature and the debug point The corresponding compensation current of temperature is calculated using formula MOD2=MOD1+Km* (T2-T1) * MOD and is less than the debug point temperature All temperature sections the corresponding compensation current of section point temperature, including:
A, public affairs are used using the corresponding compensation current of the debug point temperature as MOD1 using the debug point temperature as T1 Formula MOD2=MOD1+Km* (T2-T1) * MOD, which are calculated, is less than the debug point temperature, and warm with debug point temperature place Spend the corresponding compensation current MOD2 of section point temperature of the adjacent temperature section of section, wherein T2 is less than T1;
B, it is counted the MOD2 as new MOD1, T2 using formula MOD2=MOD1+Km* (T2-T1) * MOD as new T1 New MOD2;
Cycle executes step B, until T2 is minimum temperature.
4. according to the method described in claim 2, it is characterized in that, described according to the debug point temperature and the debug point The corresponding compensation current of temperature is calculated using formula MOD2=MOD1+Km* (T2-T1) * MOD and is more than the debug point temperature All temperature sections the corresponding compensation current of section point temperature, including:
It A, will be described using the corresponding compensation current of the debug point temperature as MOD1 using the debug point temperature as T1 The normalization slope value of temperature section where debug point temperature uses formula MOD2=MOD1+Km* (T2-T1) * MOD as Km It calculates and is more than the debug point temperature, and the section point temperature pair of the temperature section adjacent with temperature section where the debug point temperature The compensation current MOD2 answered, wherein T2 is more than T1;
B, it is counted the MOD2 as new MOD1, T2 using formula MOD2=MOD1+Km* (T2-T1) * MOD as new T1 New MOD2;
Cycle executes step B, until T2 is maximum temperature.
5. according to the method described in claim 2, it is characterized in that, the determining debug point temperature and debug point temperature correspond to Compensation current before, further include:
The sample optical module of acquisition preset quantity corresponding compensation current in the section point temperature of each temperature section;
According to formulaDetermine the slope value of each temperature section of each sample optical module, wherein T1 and T2 is the section point temperature of two adjacent temperature sections, and MOD1' and MOD2' are two adjacent temperature sections in each sample optical module Section point temperature corresponding to compensation current, MOD' be each sample optical module in the corresponding compensation electric current of debug point temperature Value;
Calculation processing is carried out to the slope value of each temperature section of each sample optical module, obtains the normalizing of each temperature section Change slope value.
6. according to the method described in claim 5, it is characterized in that, each temperature section to each sample optical module Slope value carry out calculating calculation processing, obtain the normalization slope value of each temperature section, including:
The average value for calculating slope value of all sample optical modules on each temperature section, using the average value as each temperature The normalization slope value of section.
7. according to claim 1-6 any one of them methods, which is characterized in that it is described according to the Current Temperatures, default Compensation ammeter in search corresponding with Current Temperatures compensation current, including:
If the Current Temperatures of the optical module are between the section point temperature of two adjacent temperature sections, according to formula a+ (b-a) * Delta/2 or formula a- (a-b) * delta/2 calculates the corresponding compensation current of the Current Temperatures, wherein a and b are respectively The corresponding compensation current of the two section point temperature adjacent with the Current Temperatures, delta are the first temperature and the first difference Remainder, first temperature be the sum of the Current Temperatures and preset minimum temperature, first difference be with it is described currently The difference of two adjacent section point temperature of temperature.
8. the method according to the description of claim 7 is characterized in that described according to formula a+ (b-a) * delta/2 or formula a- (a-b) * delta/2 calculate the corresponding compensation current of the Current Temperatures, including:
If b is more than a, the corresponding current offset values of the Current Temperatures are calculated using formula a+ (b-a) * delta/2;
If a is more than b, the corresponding current offset values of the Current Temperatures are calculated using formula a- (a-b) * delta/2.
9. a kind of optical module, which is characterized in that the optical module requires 1-8 any one of them optical modules for perform claim Current compensation method.
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