CN106027157A - Current compensation method for optical module and optical module - Google Patents

Current compensation method for optical module and optical module Download PDF

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Publication number
CN106027157A
CN106027157A CN201610323989.9A CN201610323989A CN106027157A CN 106027157 A CN106027157 A CN 106027157A CN 201610323989 A CN201610323989 A CN 201610323989A CN 106027157 A CN106027157 A CN 106027157A
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temperature
current
compensation
point temperature
debug
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CN106027157B (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 invention provides a current compensation method for an optical module and the optical module. The method comprises the following steps: acquiring a current temperature of the optical module; finding a compensation current value which corresponds to the current temperature from a preset compensation current table according to the current temperature, wherein the compensation current table is used for recording compensation current values which correspond to segment point temperatures of temperature segments, and the compensation current values which correspond to the segment point temperatures of the temperature segments are calculated according to a formula MOD2=MOD1+Kmx(T2-T1)xMOD; and performing current compensation on the optical module according to the compensation current value which corresponds to the current temperature. Through adoption of the method, the calculated compensation current value is more approximate to an ideal value, and the current compensation accuracy is higher, so that optical power output by the optical module in the case of temperature change can be kept stable.

Description

The current compensation method of optical module and optical module
Technical field
The present invention relates to optical transport technology, particularly relate to current compensation method and the optical module of a kind of optical module.
Background technology
Along with the development of optical communication field, optical module has become device indispensable on optical transmission device. Optical module converts electrical signals to optical signal by internal light emission module and sends into optical fiber and be transmitted. Specifically, in light emission module, by driving chip output modulation electric current and bias current to laser instrument, When the current value of output to laser instrument exceedes threshold current, laser instrument will send optical signal.Laser instrument belongs to In semiconductor device, the temperature of laser instrument is the highest, and its threshold current is the biggest.In order to ensure that laser instrument exports The stablizing, when laser temperature raises, it is necessary to driving chip is exported of luminous power of optical signal Modulation electric current and bias current compensate.Wherein, the compensation of bias current is by automated power control (Automatic Power Control is called for short APC) realizes, and the compensation of modulation electric current can be by building Vertical modulation (Modulation is called for short MOD) compensation table carries out section linear compensating, uses critesistor Realize etc. mode.Wherein, the mode setting up MOD compensation table realizes simple and effective, therefore Which uses extensively.
In the prior art, the concrete grammar of section linear compensating is carried out by setting up MOD compensation table For:
After laser temperature is stable, according to the known slope K that Current Temperatures is corresponding, by this slope K It is multiplied by the difference of Current Temperatures and debug point temperature, adds the compensation current that debug point temperature is corresponding, Using result of calculation as compensation current corresponding to Current Temperatures.
But, use existing current compensation method can only meet offset near room temperature debug point very accurate, More deviation debug point region is the biggest from ideal goal value deviation, causes compensation current inaccurate, and then leads Cause the luminous power instability that optical module is exported when variations in temperature.
Summary of the invention
The present invention provides current compensation method and the optical module of a kind of optical module, is used for solving prior art The inaccurate problem of compensation electric current calculated.
First aspect present invention provides the current compensation method of a kind of optical module, including:
Obtain the Current Temperatures of described optical module;
In default compensating, ammeter is searched the benefit corresponding with described Current Temperatures according to described Current Temperatures Repaying current value, wherein, described compensation ammeter is corresponding for the section point temperature recording each described temperature section Compensation current, the compensation current that the section point temperature of each temperature section is corresponding passes through formula MOD2=MOD1+Km × (T2-T1) × MOD calculates acquisition, T1 and T2 is adjacent two temperature sections Section point temperature, MOD1 is the compensation current that T1 is corresponding, and MOD2 is compensation electric current corresponding for T2 Value, MOD is the compensation current that debug point temperature is corresponding, and Km is each by multiple sample light modules The compensation current of the section point temperature of temperature section and benefit corresponding to the debug point temperature of described sample light module Repay current value to carry out calculating the normalization slope value obtained;
According to the compensation current that described and described Current Temperatures is corresponding, described optical module is carried out electric current benefit Repay.
Second aspect present invention provides a kind of optical module, for performing the current compensation side of aforesaid optical module Method.
The current compensation method of optical module provided by the present invention and optical module, use formula The section point temperature of MOD2=MOD1+Km × all temperature sections of (T2-T1) × MOD one-time calculation is corresponding Compensation current, this formula contains the compensation current that debug point temperature is corresponding, and according to tune The normalization slope value of the compensation current generation that pilot temperature is corresponding, so that calculate according to this formula The compensation current gone out is more nearly ideal value, and the degree of accuracy of current compensation is higher such that it is able to ensure light The luminous power that module is exported when variations in temperature keeps stable.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to reality Execute the required accompanying drawing used in example or description of the prior art to be briefly described, it should be apparent that under, Accompanying drawing during face describes is some embodiments of the present invention, for those of ordinary skill in the art, On the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 be optical module light emission module in the electric current of laser instrument, the variation relation of temperature and power show It is intended to;
The flow process signal of the current compensation method embodiment one of the optical module that Fig. 2 provides for the embodiment of the present invention Figure;
The flow process signal of the current compensation method embodiment two of the optical module that Fig. 3 provides for the embodiment of the present invention Figure;
The flow process signal of the current compensation method embodiment three of the optical module that Fig. 4 provides for the embodiment of the present invention Figure;
The flow process signal of the current compensation method embodiment four of the optical module that Fig. 5 provides for the embodiment of the present invention Figure;
The flow process signal of the current compensation method embodiment five of the optical module that Fig. 6 provides for the embodiment of the present invention Figure;
The exemplary plot of the current compensation method of the optical module that Fig. 7 provides for the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the present invention, and It is not all, of embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art are not doing Go out the every other embodiment obtained under creative work premise, broadly fall into the scope of protection of the invention.
Fig. 1 be optical module light emission module in the electric current of laser instrument, the variation relation of temperature and power show It is intended to, as it is shown in figure 1, for the power stability ensureing laser instrument, need to carry out current compensation, and, Along with the rising of temperature, the small size change of temperature, the change compensating electric current of its correspondence all can be the biggest.
Prior art is carried out in the method for section linear compensating by setting up MOD compensation table, according to working as Known slopes K corresponding to front temperature carries out current compensation, and this known slopes K passes through formulaCalculating, wherein, T1 and T2 is respectively the section point temperature of adjacent two temperature sections Degree, MOD1 is the compensation current that T1 is corresponding, and MOD2 is the compensation current that T2 is corresponding.Due to The reason easily such as Optical Device Coupling, the compensation that the laser instrument of a lot of optical modules is required at the same temperature Current value is the most unequal, when carrying out current compensation according to this slope, can only meet near room temperature debug point Compensation current accurate, more deviate debug point, the compensation current calculated is with desired value deviation more Greatly, therefore, the accuracy rate using existing method that the laser instrument of optical module is carried out current compensation is the highest.
The present invention, based on the problems referred to above, proposes a kind of according to room temperature debug point temperature, room temperature debug point temperature Corresponding compensation current and according to the normalization slope value that specific formulation calculates, generates all temperature The method of compensation current accurately.
The flow process signal of the current compensation method embodiment one of the optical module that Fig. 2 provides for the embodiment of the present invention Figure, as in figure 2 it is shown, temperature is divided into multiple temperature section by the method, the method includes:
S101, the Current Temperatures of acquisition optical module.
It is alternatively possible to by the micro-control unit (Microcontroller Unit is called for short MCU) of optical module Temperature sensor gets the Current Temperatures accurately of laser instrument.
S102, according to Current Temperatures, in default compensating, ammeter is searched the benefit corresponding with Current Temperatures Repay current value.
Wherein, above-mentioned compensation ammeter is for recording the compensation electric current that the section point temperature of each temperature section is corresponding Value, the compensation current that the section point temperature of each temperature section is corresponding passes through formula MOD2=MOD1+Km × (T2-T1) × MOD calculates acquisition.Wherein, T1 and T2 is adjacent two The section point temperature of temperature section, MOD1 is the compensation current that T1 is corresponding, and MOD2 is the benefit that T2 is corresponding Repaying current value, MOD is the compensation current that debug point temperature is corresponding, and Km is by multiple sample optical modes The compensation current of the section point temperature of each temperature section of block and the debug point temperature of sample light module are corresponding Compensation current carries out calculating the normalization slope value obtained.
In the embodiment of the present invention, the temperature that optical module may experience is divided into several temperature sections, divides Temperature section the most, then the normalization slope value obtained under full temperature is the most, and then, each temperature section Compensation current corresponding to section point temperature the most accurate.Temperature can be carried out according to the required precision of optical module Section divides.Such as, optical module may experience temperature be-40 DEG C to 80 DEG C, can from the beginning of-40 DEG C, Every 5 DEG C is a temperature section, and i.e.-40 DEG C to-35 DEG C is a temperature section, and-35 DEG C to-30 DEG C is a temperature Degree section etc..
Preferably, the section point temperature of each temperature section is the minimum temperature in this temperature section.Such as ,-40 DEG C Section point temperature to-35 DEG C of these temperature sections is-40 DEG C, the section point temperature of-35 DEG C to-30 DEG C of these temperature sections For-35 DEG C.
In this step, formula MOD2=MOD1+Km × (T2-T1) × MOD is used to calculate each temperature section Compensation current corresponding to section point temperature time, be from the beginning of a temperature section, calculate one by one and be adjacent The compensation current of section point temperature of temperature section, finally calculate the compensation current of all temperature sections. MOD in this formula is the compensation current that debug point temperature is corresponding, and this debug point temperature is often preferably Temperature, the compensation current of its correspondence can obtain easily, and the Km in this formula is that calculated in advance goes out The slope value that T1 temperature is corresponding, Km calculate time also using compensation current corresponding for debug point temperature as One of them parameter.I.e. when calculating compensation current, the compensation current of debug point temperature is taken into account Generating a new computing formula, the compensation current calculated according to this computing formula is compared to making The compensation current calculated by prior art is more nearly ideal value, and i.e. the degree of accuracy of current compensation is more High.
After the compensation current that the section point temperature calculating certain temperature section according to above-mentioned formula is corresponding, meeting Compensation current corresponding for the section point temperature of this temperature section is write in above-mentioned compensation ammeter, this compensation electricity Stream table have recorded the compensation current of the section point temperature of all temperature sections, this compensation ammeter is saved in In the specific memory element of optical module, when the laser temperature of optical module changes, direct basis Current Temperatures inquires about this compensation ammeter can obtain the compensation current that Current Temperatures is corresponding.
And then, the MOD of the driving chip of the compensation current obtained write light emission module is deposited In device, driving chip reads current value from MOD depositor, and row number module of going forward side by side is changed, thus Form modulation circuit to export in laser instrument, so that the optical signal output of laser instrument keeps stable.
The compensation current that S103, basis are corresponding with described Current Temperatures, carries out current compensation to optical module.
In the present embodiment, use formula MOD2=MOD1+Km × (T2-T1) × MOD one-time calculation institute There is the compensation current that the section point temperature of temperature section is corresponding, this formula contains debug point temperature corresponding Compensation current, and the normalization slope value generated according to the compensation current that debug point temperature is corresponding, So that the compensation current calculated according to this formula is more nearly ideal value, current compensation accurate Du Genggao such that it is able to ensure that the luminous power that optical module is exported when variations in temperature keeps stable.
On the basis of above-described embodiment, the present embodiment is directed to use with formula The compensation that the section point temperature of MOD2=MOD1+Km* (T2-T1) the * MOD each temperature section of calculating is corresponding is electric The concrete grammar of flow valuve, i.e. the current compensation method of the optical module that Fig. 3 provides for the embodiment of the present invention is real Execute the schematic flow sheet of example two, as it is shown on figure 3, above-mentioned steps S102 passes through formula The section point temperature that MOD2=MOD1+Km × (T2-T1) × MOD calculates each temperature section of acquisition is corresponding Compensation current includes:
S201, determine debug point temperature and compensation current corresponding to debug point temperature.
As previously shown, debug point temperature is preferably room temperature, the compensation electricity under detecting room temperature and determining room temperature Flow valuve the most easily realizes and result is accurate.According to actual needs, debug point temperature can be set to 32 DEG C, the room temperature such as 30 DEG C.
Specifically, can be by the micro-control unit (MicroController Unit is called for short MCU) of optical module On temperature sensors of high precision whether be room temperature, and by with MCU even if detecting the temperature of optical module The host computer connect is to determine that temperature is the most stable.After temperature stabilization is maintained at debug point temperature, use eye Figure instrument determines, with equipment such as Error Detectors, the compensation current that debug point temperature is corresponding.
S202, according to compensation current corresponding to above-mentioned debug point temperature and debug point temperature, make respectively The all temperature sections less than debug point temperature are calculated with formula MOD2=MOD1+Km* (T2-T1) * MOD Compensation current corresponding to section point temperature, and the section point temperature of all temperature sections more than debug point temperature The compensation current that degree is corresponding.
The temperature range that the embodiment of the present invention is suitable for is big, when specifically calculating, with debug point temperature as basic point, Calculating temperature is less than the compensation current of all sections of some temperature of debug point temperature one end the most one by one, more one by one Calculate the compensation current of all sections of some temperature more than debug point temperature one end.Because debug point temperature and The result of the compensation current of its correspondence is accurate, therefore, calculated with debug point temperature by basic point its The accuracy rate of the compensation current of his each section of some temperature is the highest.
On the basis of above-described embodiment, the present embodiment relates to using respectively formula MOD2=MOD1+Km* (T2-T1) * MOD calculates the section point of all temperature sections less than debug point temperature The compensation current that temperature is corresponding, and corresponding more than the section point temperature of all temperature sections of debug point temperature A kind of concrete grammar of compensation current, i.e. the electricity of the optical module that Fig. 4 provides for the embodiment of the present invention The schematic flow sheet of stream compensation method embodiment three, as shown in Figure 4, a kind of enforcement of above-mentioned steps S202 Mode is:
S301, using debug point temperature as T1, using compensation current corresponding for debug point temperature as MOD1, uses formula MOD2=MOD1+Km* (T2-T1) * MOD to calculate less than debug point temperature, and And the compensation current that the section point temperature of the temperature section adjacent with debug point temperature place temperature section is corresponding MOD2, wherein, T2 is less than T1.
That is, according to debug point temperature and compensation electric current thereof, first less than debug point temperature is first calculated The compensation current of individual section point temperature.Wherein, T1 is debug point temperature, and MOD1 is the benefit that T1 is corresponding Repaying current value, T2 is first section point temperature less than debug point temperature, and Km is first section point temperature The normalization slope value of the temperature section at place, plugs these values in above-mentioned formula, calculates first section The compensation current that some temperature is corresponding.
S302, using MOD2 as new MOD1, T2 as new T1, use formula MOD2=MOD1+Km* (T2-T1) * MOD calculates new MOD2.
It should be noted that Km when calculating every time is all referring to the little temperature section of temperature in adjacent temperature section Normalization slope value, i.e. the normalization slope value of T2 place temperature section.
S303, circulation perform step S302, until T2 is minimum temperature.
After calculating less than the compensation current of first section point temperature of debug point temperature, again by it As basic point, re-use above-mentioned formula and calculate the compensation current of next section point temperature, the like, Continue on the compensation current newly calculated and above-mentioned formula calculates the compensation electric current of remaining section of some temperature Value, during until T2 is minimum temperature, illustrates the compensation electric current of all sections of some temperature less than debug point temperature Value all calculates complete, then stop calculating.
Through above-mentioned cycle calculations, i.e. obtain the section point temperature of all temperature sections less than debug point temperature The compensation current that degree is corresponding.
On the basis of above-described embodiment, the present embodiment relates to using respectively formula MOD2=MOD1+Km* (T2-T1) * MOD calculates the section point of all temperature sections less than debug point temperature The compensation current that temperature is corresponding, and corresponding more than the section point temperature of all temperature sections of debug point temperature The another kind of concrete grammar of compensation current, i.e. the optical module that Fig. 5 provides for the embodiment of the present invention The schematic flow sheet of current compensation method embodiment four, as it is shown in figure 5, the another kind of above-mentioned steps S202 Embodiment is:
S401, using debug point temperature as T1, using compensation current corresponding for debug point temperature as MOD1, using the normalization slope value of the temperature section at debug point temperature place as Km, uses formula MOD2=MOD1+Km* (T2-T1) * MOD calculates more than debug point temperature, and with debug point temperature Compensation current MOD2 that the section point temperature of the temperature section that place temperature section is adjacent is corresponding, wherein, T2 is big In T1.
That is, according to debug point temperature and compensation electric current thereof, first more than debug point temperature is first calculated The compensation current of individual section point temperature.Wherein, T1 is debug point temperature, and MOD1 is the benefit that T1 is corresponding Repaying current value, T2 is first section point temperature less than debug point temperature, and Km is debug point temperature place The normalization slope value of temperature section, plug these values in above-mentioned formula, calculate first section point temperature The compensation current that degree is corresponding.
S402, using MOD2 as new MOD1, T2 as new T1, use formula MOD2=MOD1+Km* (T2-T1) * MOD calculates new MOD2.
It should be noted that Km when calculating every time is all referring to the little temperature section of temperature in adjacent temperature section Normalization slope value, i.e. the normalization slope value of T1 place temperature section.
S403, circulation perform step S402, until T2 is maximum temperature.
After calculating more than the compensation current of first section point temperature of debug point temperature, again by it As basic point, re-use above-mentioned formula and calculate the compensation current of next section point temperature, the like, Continue on the compensation current newly calculated and above-mentioned formula calculates the compensation electric current of remaining section of some temperature Value, during until T2 is maximum temperature, illustrates the compensation electric current of all sections of some temperature more than debug point temperature Value all calculates complete, then stop calculating.
Through above-mentioned cycle calculations, i.e. obtain the section point temperature of all temperature sections more than debug point temperature The compensation current that degree is corresponding.
On the basis of above-described embodiment, the present embodiment relates to the normalization slope value determining each temperature section Concrete grammar, i.e. the current compensation method embodiment of the optical module that Fig. 6 provides for the embodiment of the present invention The schematic flow sheet of five, as shown in Figure 6, before abovementioned steps S102, also includes:
S501, sample light module benefit of correspondence in the section point temperature of each temperature section of collection predetermined number Repay current value.
Specifically, host computer can be connected with multiple sample light modules, then by light power meter, eye pattern The equipment such as instrument and Error Detector, gathers the compensation current of all sections of some temperature of multiple sample light module.
S502, according to formulaDetermine each temperature section of each sample light module Slope value.
Wherein, T1 and T2 is the section point temperature of two adjacent temperature sections, MOD1' and MOD2' is each The compensation current corresponding to section point temperature of two adjacent temperature sections in sample light module, MOD' is each The compensation current that in sample light module, debug point temperature is corresponding.
In this step, for each sample light module, according to aforementioned all sections of collected some temperature Compensation current all use above-mentioned formula to the slope value of the section of calculating point, it is also contemplated that debugging in this formula The compensation current of some temperature.The slope value using this formula to be calculated is more nearly ideal value, thus Ensure that the degree of accuracy that subsequent current compensates is higher.
S503, slope value to each temperature section of each sample light module carry out calculating process, obtain every The normalization slope value of individual temperature section.
Through above-mentioned calculating, the slope value of each temperature section of each sample light module can be obtained, due to Each sample light module slope value on same temperature section may and differ, accordingly, it would be desirable to same Different Slope value on one temperature section processes.Such as, therefrom select maximum or the slope of minimum It is worth the normalization slope as this temperature section, or carries out calculating etc. according to certain weight.
And one preferably computational methods are:
Calculate the meansigma methods of all sample light modules slope value on each temperature section, by described meansigma methods Normalization slope value as each temperature section.
These computational methods are simple and quick, and the meansigma methods calculated more can represent the universal slope of optical module Value.
In another embodiment, in above-mentioned steps S102, according to Current Temperatures at default compensation electric current When the compensation current corresponding with Current Temperatures searched by table, if compensation current can not directly be found, If i.e. the Current Temperatures of optical module 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 compensation current that Current Temperatures is corresponding, wherein, a Being respectively, with b, the compensation current that two the section point temperature adjacent with Current Temperatures is corresponding, delta is first Temperature and the remainder of the first difference, wherein, the first temperature is Current Temperatures and the minimum temperature sum preset, First difference is the difference of two adjacent with Current Temperatures section point temperature.
Calculate through said method is all the compensation current of each section of some temperature, in actually used process In, if the Current Temperatures of optical module is not wherein certain section of some temperature, but two section point temperature it Between temperature, then carry out interpolation arithmetic acquisition according to the compensation current of section point temperature.Specifically, if b More than a, then formula a+ (b-a) * delta/2 is used to calculate the current offset values that described Current Temperatures is corresponding;If a More than b, then formula a-(a-b) * delta/2 is used to calculate the current offset values that described Current Temperatures is corresponding.
For example, it is assumed that the difference between each section of some temperature is 2 DEG C, i.e. MOD compensates every 2 DEG C of one lattice in table. Assuming that MOD compensates minimum temperature in table and is-40 DEG C ,-40 DEG C of corresponding compensation current are X1 ,-38 DEG C Corresponding compensation current is X2, and-36 DEG C of corresponding compensation current are X3, X3 > X2, Current Temperatures For-37 DEG C, then the first temperature be Current Temperatures-37 DEG C with minimum temperature and-40 DEG C, for-3 DEG C, delta It is the remainder of the first temperature and temperature gap 2 DEG C, according to these values, uses formula a+ (b-a) * delta/2 to enter Row calculate (wherein, a be X2, b be X3), i.e. can get the compensation current of Current Temperatures 37 DEG C.
The exemplary plot of the current compensation method of the optical module that Fig. 7 provides for the embodiment of the present invention, such as Fig. 7 institute Show, including three temperature sections, respectively temperature section 1, temperature section 2 and temperature section 3.Wherein, temperature section The section point temperature of 1 is 20 DEG C, and compensating electric current is 40, as shown in A point in Fig. 7;The section point of temperature section 2 Temperature is 30 DEG C, and compensating electric current is 50, as shown in B point in Fig. 7;The section point temperature of temperature section 3 is 40 DEG C, compensating electric current is 70, as shown in C point in Fig. 7.Assuming that debug point is A, debug point temperature is 20 DEG C, then the compensation current that debug point temperature is corresponding is 40.Then, the formula of prior art is usedWith the formula using the embodiment of the present inventionCalculated The temperature section 1 gone out and the slope of temperature section 2 are shown in table 1:
Table 1
Temperature section 1 Temperature section 2
K 1 2
Km 1/40 1/20
Due to module optical assembly coupling aspect, need compensation current must expand original 2 to Can be only achieved requirement again, i.e. the compensation current of A point needs to reach 80, the compensation current needs of B point Reach 100, the compensation current of C point needs to reach 140.
If the method using prior art, calculate B point and the compensation current of C point based on debug point A Formula be respectively as follows:
B point: 80+1* (30-20)=90
C point: 90+2* (40-30)=110
It will be apparent that use the method compensation current calculated and the ideal being actually needed of prior art Value deviation is the biggest.
And if the method that provided of the embodiment of the present invention is provided, calculate B point and C point based on debug point A The formula of compensation current be respectively as follows:
B point: 80+1/40*80* (30-20)=100
C point: 100+1/20*80* (40-30)=140
It can be seen that use the compensation current that calculated of method of the embodiment of the present invention and be actually needed Ideal value consistent, i.e. compared to prior art, use the method for the embodiment of the present invention significantly to carry The accuracy rate of high compensation current, it is ensured that stablizing of the power that optical module is exported when variations in temperature.
The embodiment of the present invention also provides for a kind of optical module, and this optical module is used for performing aforesaid embodiment of the method, It is similar with technique effect that it realizes principle, and here is omitted.
One of ordinary skill in the art will appreciate that: realize all or part of step of above-mentioned each method embodiment Suddenly can be completed by the hardware that programmed instruction is relevant.Aforesaid program can be stored in a computer can Read in storage medium.This program upon execution, performs to include the step of above-mentioned each method embodiment;And Aforesaid storage medium includes: ROM, RAM, magnetic disc or CD etc. are various can store program code Medium.
Last it is noted that various embodiments above is only in order to illustrate technical scheme, rather than right It limits;Although the present invention being described in detail with reference to foregoing embodiments, this area common Skilled artisans appreciate that the technical scheme described in foregoing embodiments still can be modified by it, Or the most some or all of technical characteristic is carried out equivalent;And these amendments or replacement, and The essence not making appropriate technical solution departs from the scope of various embodiments of the present invention technical scheme.

Claims (9)

1. the current compensation method of an optical module, it is characterised in that temperature is divided into many by described method Individual temperature section, described method includes:
Obtain the Current Temperatures of described optical module;
According to described Current Temperatures, ammeter is searched corresponding with described Current Temperatures in default compensating Compensation current, wherein, described compensation ammeter is for recording the section point temperature pair of each described temperature section The compensation current answered, the compensation current that the section point temperature of each temperature section is corresponding passes through formula MOD2=MOD1+Km × (T2-T1) × MOD calculates acquisition, T1 and T2 is adjacent two temperature sections Section point temperature, MOD1 is the compensation current that T1 is corresponding, and MOD2 is compensation electric current corresponding for T2 Value, MOD is the compensation current that debug point temperature is corresponding, and Km is each by multiple sample light modules The compensation current of the section point temperature of temperature section and benefit corresponding to the debug point temperature of described sample light module Repay current value to carry out calculating the normalization slope value obtained;
According to the compensation current that described and described Current Temperatures is corresponding, described optical module is carried out electric current benefit Repay.
Method the most according to claim 1, it is characterised in that the section point temperature of described each temperature section The compensation current that degree is corresponding calculates acquisition by formula MOD2=MOD1+Km × (T2-T1) × MOD, Including:
Determine debug point temperature and compensation current corresponding to debug point temperature;
According to the compensation current that described debug point temperature and described debug point temperature are corresponding, use respectively Formula MOD2=MOD1+Km* (T2-T1) * MOD calculates all temperature less than described debug point temperature The compensation current corresponding to section point temperature of section, and all temperature sections more than described debug point temperature The compensation current that section point temperature is corresponding.
Method the most according to claim 2, it is characterised in that described according to described debug point temperature And the compensation current that described debug point temperature is corresponding, use formula MOD2=MOD1+Km* (T2-T1) * MOD calculates all temperature sections less than described debug point temperature The compensation current that section point temperature is corresponding, including:
A, using described debug point temperature as T1, compensation current corresponding for described debug point temperature is made For MOD1, formula MOD2=MOD1+Km* (T2-T1) * MOD is used to calculate less than described debug point temperature Degree, and the compensation that the section point temperature of the temperature section adjacent with described debug point temperature place temperature section is corresponding Current value MOD2, wherein, T2 is less than T1;
B, using described MOD2 as new MOD1, T2 as new T1, use formula MOD2=MOD1+Km* (T2-T1) * MOD calculates new MOD2;
Circulation performs step B, until T2 is minimum temperature.
Method the most according to claim 2, it is characterised in that described according to described debug point temperature And the compensation current that described debug point temperature is corresponding, use formula MOD2=MOD1+Km* (T2-T1) * MOD calculates all temperature sections more than described debug point temperature The compensation current that section point temperature is corresponding, including:
A, using described debug point temperature as T1, compensation current corresponding for described debug point temperature is made For MOD1, using the normalization slope value of the temperature section at described debug point temperature place as Km, use public affairs Formula MOD2=MOD1+Km* (T2-T1) * MOD calculates more than described debug point temperature, and with described Compensation current MOD2 that the section point temperature of the temperature section that debug point temperature place temperature section is adjacent is corresponding, Wherein, T2 is more than T1;
B, using described MOD2 as new MOD1, T2 as new T1, use formula MOD2=MOD1+Km* (T2-T1) * MOD calculates new MOD2;
Circulation performs step B, until T2 is maximum temperature.
Method the most according to claim 2, it is characterised in that described determine debug point temperature and Before the compensation current that debug point temperature is corresponding, also include:
Gather the compensation electric current that the sample light module of predetermined number is corresponding in the section point temperature of each temperature section Value;
According to formulaDetermine each temperature section oblique of each sample light module Rate value, wherein, T1 and T2 is the section point temperature of two adjacent temperature sections, MOD1' and MOD2' is every The compensation current corresponding to section point temperature of two adjacent temperature sections in individual sample light module, MOD' is every The compensation current that in individual sample light module, debug point temperature is corresponding;
The slope value of each temperature section of described each sample light module is carried out calculating process, obtains each The normalization slope value of temperature section.
Method the most according to claim 5, it is characterised in that described to described each sample optical mode The slope value of each temperature section of block carries out calculating calculating and processes, and obtains the normalization slope of each temperature section Value, including:
Calculate the meansigma methods of all sample light modules slope value on each temperature section, by described meansigma methods Normalization slope value as each temperature section.
7. according to the method described in any one of claim 1-6, it is characterised in that work as described in described basis Front temperature, searches the compensation current corresponding with described Current Temperatures in default compensating, bag in ammeter Include:
If the Current Temperatures of described optical module is between the section point temperature of two adjacent temperature sections, then basis Formula a+ (b-a) * delta/2 or formula a-(a-b) * delta/2 calculates the compensation electric current that described Current Temperatures is corresponding Value, wherein, a with b is respectively the compensation electric current that two the section point temperature adjacent with described Current Temperatures is corresponding Value, delta is the remainder of the first temperature and the first difference, and described first temperature is that described Current Temperatures is with pre- If minimum temperature sum, described first difference is two adjacent with described Current Temperatures section point temperature Difference.
Method the most according to claim 7, it is characterised in that described according to formula a+ (b-a) * delta/2 Or formula a-(a-b) * delta/2 calculates the compensation current that described Current Temperatures is corresponding, including:
If b is more than a, then uses formula a+ (b-a) * delta/2 to calculate electric current corresponding to described Current Temperatures and mend Repay value;
If a is more than b, then formula a-(a-b) * delta/2 is used to calculate the current compensation that described Current Temperatures is corresponding Value.
9. an optical module, it is characterised in that described optical module is used for performing any one of claim 1-8 The current compensation method of described optical module.
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