CN105656562B - A kind of photoelectric conversion module extinction ratio autocontrol method - Google Patents
A kind of photoelectric conversion module extinction ratio autocontrol method Download PDFInfo
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- CN105656562B CN105656562B CN201610159356.9A CN201610159356A CN105656562B CN 105656562 B CN105656562 B CN 105656562B CN 201610159356 A CN201610159356 A CN 201610159356A CN 105656562 B CN105656562 B CN 105656562B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
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Abstract
The invention discloses a kind of photoelectric conversion module extinction ratio autocontrol method, photoelectric conversion module includes master controller MCU, laser driving, limiting amplifier, photoelectric conversion module electrical interface, reception optical assembly ROSA and transmitting optical assembly TOSA, the reception optical assembly ROSA, limiting amplifier, photoelectric conversion module electrical interface, laser driving and transmitting optical assembly TOSA sequentially connect, and master controller MCU connects with photoelectric conversion module electrical interface, limiting amplifier, laser driving respectively；Manufacture craft of the present invention is simple, convenience and high-efficiency, shortens the equipment holding time；The product extinction ratio uniformity that the photoelectric conversion module high-volume of Creative Design makes is high, more can guarantee that high-speed product quality.
Description
Technical field
The present invention relates to optical communication field, more particularly to a kind of photoelectric conversion module extinction ratio autocontrol method.
Background technology
Fiber optic communication is in industrial control field using more and more extensive, the work spy of laser technical grade (- 40~85 DEG C) environment
Property determine photoelectric conversion module in high temperature environments long-term work fault rate improve.High temperature resistant and mature and stable opto-electronic conversion
Module turns into industry attractable point, the emphasis of marketing.High speed optoelectronic modular converter requires high to extinction ratio, and extinction ratio is adjusted
Whole narrow range.Due to the discreteness of laser in batch production, the extinction ratio uniformity of photoelectric conversion module certainly will be caused to criticize
Amount difficult control in making.
Problem of the prior art and shortcoming：The laser of high speed optoelectronic modular converter varies with temperature needs and is operated electricity
The compensation adjustment of stream, current mainstream scheme are master controller MCU real by lookup table data LUT (LookUp Table)
It is existing.During product batch making, initial workpiece makes the transmitting luminous power that photoelectric conversion module is first adjusted according to design objective,
The photoelectric conversion module for having debugged luminous power is put into high/low temperature circulating box again to operate by the upper software of computer, from -40 DEG C
Extinction ratio debugging sampling is carried out every 10 DEG C to 85 DEG C, modulation electric current of the host computer to each sampled point carries out corresponding to note one by one
Record, every 2 DEG C of respective productions are pressed into lookup table number by smoothing algorithm by the upper computer software of computer after the completion of sampling
According to LUT, finally the look-up table data just makes the photoelectric conversion module high/low temperature operating current configuration data of order as this batch.
Certain working characteristics is discrete due to existing in laser batch, and configuring unified look-up table data can not meet under high/low temperature
The high/low temperature compensation of all photoelectric conversion modules needs, and the extinction ratio index of a small number of photoelectric conversion modules does not conform under high/low temperature
It is obvious under lattice, particularly high temperature.
So in order to ensure the full temperature index of photoelectric conversion module, the making increase process of photoelectric conversion module, made
Journey meets the high-performance of product by increasing high temperature test second-order correction penalty coefficient.The first step, the look-up table that initial workpiece is gathered
Lattice data LUT is cured to nonvolatile memory corresponding to the Imod LUT of photoelectric conversion module by the upper software burning of computer
In, the light eye pattern of module (25 DEG C) at room temperature is debugged；Second step, the photoelectricity revolving die block batch debugged at room temperature
Amount is placed into the baking oven of 85 DEG C of high temperature, and storage tests transmitting light eye pattern index in high temperature environments after 20 minutes, to extinction ratio
Change exceeded photoelectric conversion module and form penalty coefficient is changed by computer host computer, and non-volatile corresponding to being cured to deposit
In reservoir, ensure that performance indications are qualified in the range of optical module total temperature.The efficiency of above manufacturing process is low, time consuming, it is difficult to
Meet that high-volume makes demand.
The content of the invention
Goal of the invention：To overcome the shortcomings of the existing technology, the present invention is directed to provide a kind of photoelectric conversion module extinction ratio is automatic
Control method.
Technical scheme：In order to solve the above technical problems, the present invention adopts the following technical scheme that：
A kind of photoelectric conversion module extinction ratio autocontrol method, photoelectric conversion module include master controller MCU, laser
Driving, limiting amplifier, photoelectric conversion module electrical interface, reception optical assembly ROSA and transmitting optical assembly TOSA, the reception light
Component ROSA, limiting amplifier, photoelectric conversion module electrical interface, laser driving and transmitting optical assembly TOSA sequentially connect, main
Controller MCU connects with photoelectric conversion module electrical interface, limiting amplifier, laser driving respectively；
Photoelectric conversion module, which makes, to be comprised the following steps：
1), photoelectric conversion module hardware circuit design：From laser driving plus the two-in-one integrated circuit of limiting amplifier,
C8051F336 single-chip microcomputers, carry hardware luminous power and automatically control APC circuits, realize that single-chip microcomputer is integrated to high speed by I2C communications
The management configuration of chip internal work register, realize that software controls in real time；
2), photoelectric conversion module makes test circuit design：Photoelectric conversion module and test circuit pass through I2C communication interfaces
Data are exchanged, test circuit and PC exchange data by USB communication interface；
3), photoelectric conversion module temperature compensation Software for Design：With general C language to C8051F336 mcu programmings, by photoelectricity
Modular converter temperature compensation software flow writes subprogram, realizes that control is repaid in the full temperature compensation to photoelectric conversion module；
It is described in detail below：The algorithmic formula of temperature-compensating：
Imod_t=Imod_25+A* (Ibias_t-Ibias_25)；
In formula：Imod_25 is 25 degree of modulation electric current；Imod_t is modulation electric current in real time；Ibias_25 is 25 degree
Ibias electric currents；Ibias_t is real-time Ibias electric currents；A is laser works electric current high/low temperature penalty coefficient；
For the laser initial workpiece work light eye pattern test checking of different batches, the Imod electricity of laser at 25 degrees c is set
Flow and be used as Imod_25 assignment, pre-deposit MCU FLASH fixed positions, each optical module re-powers can be from
FLASH correspondence position calls the RAM to MCU to be used to calculate compensation in real time；
The penalty coefficient A of laser is previously written MCU FLASH fixed positions, writes during optical module power-up initializing
The RAM that FLASH penalty coefficient A calls in MCU uses to calculate compensation in real time；Other running parameters of optical module are set also initial
Deposit MCU RAM are recalled by FLASH during change, and work is carried out to GN1411A by MCU and GN1411A I2C communications simultaneously
Make register configuration；
4), photoelectric conversion module makes debugging software design：The upper debugging software flows of PC applied in manufacturing process,
Software is write according to the flow, employee realizes debugging and the opto-electronic conversion of light eye pattern by the execution shirtsleeve operation of PC operation interfaces
The burning solidification of module key job parameter；
5), batch photoelectric conversion module makes debugging software design：Upper PC softwares are developed with C# language, with step 4)
Software flow, the interface Dynamic link library program that loading CH431 is provided, realize PC host computers and the embedded bottom of photoelectric conversion module
Data exchange between machine.
6), batch photoelectric conversion module Making programme designs：According to initial workpiece manufacturing process temperature penalty coefficient A, set
Determine Imod_25 and arrange into download firmware；By the batch making flow of photoelectric conversion module, after firmware download configuration is set
Under 25 DEG C of environment of room temperature, optical module works on power and adjusts light eye pattern, passes through room temperature ring of the upper software at PC ends at 25 DEG C
The light eye pattern of adjusting module under border, while index is adjusted by ophthalmograp synchronization monitoring light eye pattern, light eye pattern is adjusted to product
The optimum state of specification；Stop upper software delays 1~2 second after adjusting, delay terminates the Ibias of rear retaking of a year or grade optical module
Real work current value is assigned to Ibias_25, and Ibias_25 value is stored in MCU RAM and FLASH fixed positions；Data
After storage terminates, upper software delays 2~3 seconds, display photoelectric conversion module, which makes debugging, to be terminated.
Operation principle：Photoelectric conversion module theory diagram of the present invention is shown in accompanying drawing 2, and the electric signal of interchanger passes through opto-electronic conversion
The electrical interface of module is transferred to the laser driving circuit of photoelectric conversion module, laser drive circuit driving Laser emission component
TOSA launches laser, and laser is transferred to remote equipment by optical fiber and realizes that the electrical/optical of signal transmission is changed；Realize the length of signal away from
From transmission；Laser signal transmission in optical fiber outputs electrical signals to limiting amplifier to laser pick-off component ROSA, ROSA and enters one
Step shaping amplification is output to the electrical interface of photoelectric conversion module, by electrical interface be transferred to light that interchanger realizes that signal transmits/
Electricity conversion；Main control MCU realizes management data exchange, laser drive circuit and the limited range enlargement electricity of interchanger and photoelectric conversion module
The functions such as the coordinated management configuration on road；In order to ensure the integrality of signal, the transmitting optical signal of photoelectric conversion module will demand perfection temperature
It is stable to spend operated within range light power stabilising, extinction ratio；Light power stabilising can by the luminous power automatic control circuit APC of hardware
To realize, extinction ratio is stable typically to correspond to compensation realization by being tabled look-up according to temperature.The present invention is constant in original hardware structure
On the basis of, realize that extinction ratio compensates control automatically by software algorithm.
It is preferred that the operating process that laser works electric current high/low temperature penalty coefficient A is determined in the step 3) is initial workpiece system
Make high/low temperature validation test flow, the initial workpiece makes high/low temperature validation test flow and comprised the following steps：
A) photoelectric conversion module, is assembled, light eye pattern, penalty coefficient have been debugged by index request under 25 DEG C of environment of room temperature
0.2 is preset as, and is cured in MCU FLASH；According to the extinction ratio index debugging Imod_25 of initial workpiece requirement, and it is cured to
In MCU FLASH；
B) photoelectric conversion module for having debugged light eye pattern, is put into high-low temperature chamber, verifies that the extinction ratio under hot environment becomes
Change, penalty coefficient A is changed by the method for Step wise approximation, until meeting that extinction ratio change is less than 1dB；
The extinction ratio calculation formula is：
Er=10Log (P1/P0)
In formula：Er is the extinction ratio of optical module, and for P1 to there is luminous power, P0 is no optical power；
C), verify the extinction ratio change of new penalty coefficient at low ambient temperatures, it is qualified then confirm penalty coefficient A and
Imod_25, and arrange to MCU and download in firmware, prepare burning during batch making and use.
It is preferred that Step wise approximation modification penalty coefficient A method comprises the following steps in the step b)：
B1), as high temperature extinction ratio 1dB bigger than normal temperature, penalty coefficient A is changed, penalty coefficient A is reduced 0.01 and solidifies
Into MCU FLASH；
B2), as high temperature extinction ratio 1dB smaller than normal temperature, penalty coefficient A is changed, penalty coefficient A is increased 0.01, and it is solid
Change into MCU FLASH；
B3), low-temperature test checking penalty coefficient A, ensure that extinction ratio change is less than 1dB；
B4), confirm penalty coefficient A, arrange penalty coefficient A and Imod_25 data into MCU firmwares.
In order to the generating laser operating current software automation control of the photoelectric conversion module in total temperature working range
Process processed, controlled by software automation and ensure to launch light eye pattern qualified in the range of total temperature；Photoelectricity in the step 3)
Modular converter temperature compensation software workflow comprises the following steps：
31), electricity, MCU power-up initializings, resource distribution on photoelectric conversion module；
32), be delayed 10mS, laser drive circuit Initialize installation；
33), be delayed 5mS, temperature sampling, when temperature change is more than 2 DEG C, reads Ibias_25 arranges values, reads Ibias_t
Value, bias current compensation changing value △ Ibias are calculated by software algorithm：
△ Ibias=Ibias_t-Ibias_25
Calculate modulation electric current high/low temperature compensation changing value △ Imod：
△ Imod=A* △ Ibias
34) Imod_25 values, are read, calculate Imod_t values：
Imod_t=Imod_25+ △ Imod
35), the Imod_t values of calculating are configured to the modulation electric current Imod of laser drive circuit；
36), DDM monitoring datas refresh；
37), abnormal operation monitoring management, into next temperature sampling step, circulate successively.
It is preferred that it is directly entered step 36) when temperature change is not more than 2 DEG C in the step 33).
It is preferred that the delay of the step 32), step 33) when not reaching requirement, is both needed to delay etc. until corresponding delay will
Ask.
In order to the upper debugging software flows of the PC applied in manufacturing process, software, Yuan Gongtong are write according to the flow
Cross the execution shirtsleeve operation of PC operation interfaces and realize that the debugging of light eye pattern and the burning of photoelectric conversion module key job parameter are consolidated
Change；Photoelectric conversion module makes debugging and comprised the following steps in the step 4)：
41), the I2C communication connections of PC softwares, under 25 DEG C of environment of room temperature, adjust the current value of laser drive circuit
Ibias debugs light eye pattern；
If 42), light eye pattern extinction ratio is unqualified, the electricity of laser drive circuit need to be adjusted again under 25 DEG C of environment of room temperature
Flow valuve Ibias debugs light eye pattern；
If 43), light eye pattern extinction ratio is qualified, the Ibias_t values of photoelectric conversion module are read, Ibias_t values are assigned to
Ibias_25 values, Ibias_25 values are burnt to corresponding FLASH spaces storage solidification；Ibias_25 value burnings terminate；
44), 2S delays post debugging, which makes, terminates, and after changing photoelectric conversion module, carries out new module making debugging.
In order to expect the whole manufacturing process of assembly and adjustment, procedure arrangement from former material；Step 6) the batch photoelectricity turns
Mold changing block Making programme comprises the following steps：
61), according to Order creation initial workpiece photoelectric conversion module；
62), initial workpiece product high/low temperature test determines high/low temperature penalty coefficient A and Imod_25 preset value；
63), determine and check to download firmware binaries recordable paper；PCBA firmware burnings；Photoelectric conversion module optical device
Welding assembly；Pass through PC software debugging light eye patterns；
64), batch photoelectric conversion module Making programme terminates.
The NM technology of the present invention is prior art.
Beneficial effect：1st, the photoelectric conversion module that the present invention designs first tests the initial workpiece production phase before batch making
Temperature compensation coefficient A, Imod_25 preset value burning of determination is cured in the FLASH memory of master controller distribution, light eye pattern
Operated in debugging process by the running background of upper software, real-time tracking eye pattern debugging mode collection Ibias_25 values and burning
The persistence into the FLASH memory of photoelectric conversion module, ensure the Performance optimization of every module.Whole light eye pattern debugging
Process is the same with debugging process is made under 25 DEG C of environment of low speed mill run room temperature, adjusts light eye pattern and waits upper PC softwares true
Recognize end；Debugging process is entirely made using the photoelectric conversion module of the invention under 25 DEG C of environment of room temperature to carry out,
And former made with LUT methods of tabling look-up needs every batch of device initial workpiece high/low temperature to build table, if to ensure the full work of extinction ratio of product
Industry level temperature stabilization must also carry out 100% high-temperature baking second-order correction in critical field；So comparing prior art, it is made
It is simple to make technique, convenience and high-efficiency, shortens the equipment holding time；
2nd, the product extinction ratio uniformity that the photoelectric conversion module high-volume of the invention design makes is high, more can guarantee that
High-speed product quality.
Brief description of the drawings
Fig. 1 is the P-I curves of laser of the present invention；
Fig. 2 is photoelectric conversion module theory diagram of the present invention.
Embodiment
For a better understanding of the present invention, with reference to the embodiment content that the present invention is furture elucidated, but the present invention
Content is not limited solely to the following examples.
Embodiment 1
As shown in Figure 1-2, a kind of photoelectric conversion module extinction ratio autocontrol method, photoelectric conversion module include main control
Device MCU, laser driving, limiting amplifier, photoelectric conversion module electrical interface, reception optical assembly ROSA and transmitting optical assembly
TOSA, the reception optical assembly ROSA, limiting amplifier, photoelectric conversion module electrical interface, laser driving and transmitting optical assembly
TOSA sequentially connects, and master controller MCU connects with photoelectric conversion module electrical interface, limiting amplifier, laser driving respectively；
Photoelectric conversion module, which makes, to be comprised the following steps：
1), photoelectric conversion module hardware circuit design：According to Fig. 2 photoelectric conversion module theory diagram, from SEMTECH
The high speed integrated chip GN1411A of company's production, single-chip microcomputer select C8051F336.GN1411A chips are a laser drivings
Add the two-in-one integrated circuit of limiting amplifier, carry hardware luminous power and automatically control (APC) circuit, can be communicated by I2C real
Existing single-chip microcomputer C8051F336 realizes that software controls in real time to the management configuration of GN1411A internal work registers；
2), photoelectric conversion module makes test circuit design：Photoelectric conversion module and test circuit pass through I2C communication interfaces
Data are exchanged, test circuit and PC exchange data by USB communication interface.USB turns I2C circuits and oozes what Hang Seng produced from Nanjing
CH431 private communication protocol converter ics；
3), photoelectric conversion module temperature compensation Software for Design：With general C language to C8051F336 mcu programmings, by photoelectricity
Modular converter temperature compensation software flow writes subprogram, realizes that control is repaid in the full temperature compensation to photoelectric conversion module；
It is described in detail below：The algorithmic formula of temperature-compensating：
Imod_t=Imod_25+A* (Ibias_t-Ibias_25)；
In formula：Imod_25 is 25 degree of modulation electric current；Imod_t is modulation electric current in real time；Ibias_25 is 25 degree
Ibias electric currents；Ibias_t is real-time Ibias electric currents；A is laser works electric current high/low temperature penalty coefficient；
For the laser initial workpiece work light eye pattern test checking of different batches, the Imod electricity of laser at 25 degrees c is set
Flow and be used as Imod_25 assignment, pre-deposit MCU FLASH fixed positions, each optical module re-powers can be from
FLASH correspondence position calls the RAM to MCU to be used to calculate compensation in real time；
The penalty coefficient A of laser is previously written MCU FLASH fixed positions, writes during optical module power-up initializing
The RAM that FLASH penalty coefficient A calls in MCU uses to calculate compensation in real time；Other running parameters of optical module are set also initial
Deposit MCU RAM are recalled by FLASH during change, and work is carried out to GN1411A by MCU and GN1411A I2C communications simultaneously
Make register configuration；
4), photoelectric conversion module makes debugging software design：The upper debugging software flows of PC applied in manufacturing process,
Software is write according to the flow, employee realizes debugging and the opto-electronic conversion of light eye pattern by the execution shirtsleeve operation of PC operation interfaces
The burning solidification of module key job parameter；
5), batch photoelectric conversion module makes debugging software design：Upper PC softwares are developed with C# language, with step 4)
Software flow, the interface Dynamic link library program that loading CH431 is provided, realize PC host computers and the embedded bottom of photoelectric conversion module
Data exchange between machine.
6), batch photoelectric conversion module Making programme designs：According to initial workpiece manufacturing process temperature penalty coefficient A, set
Determine Imod_25 and arrange into download firmware；By the batch making flow of photoelectric conversion module, after firmware download configuration is set
Under 25 DEG C of environment of room temperature, optical module works on power and adjusts light eye pattern, passes through room temperature ring of the upper software at PC ends at 25 DEG C
The light eye pattern of adjusting module under border, while index is adjusted by ophthalmograp synchronization monitoring light eye pattern, light eye pattern is adjusted to product
The optimum state of specification；Stop upper software delays 1~2 second after adjusting, delay terminates the Ibias of rear retaking of a year or grade optical module
Real work current value is assigned to Ibias_25, and Ibias_25 value is stored in MCU RAM and FLASH fixed positions；Data
After storage terminates, upper software delays 2~3 seconds, display photoelectric conversion module, which makes debugging, to be terminated.
As shown in figure 1, the P-I curves of laser, the operating current and transmitting luminous power relation of main corresponding laser.Can
To see following characteristics：Laser is luminous to have individual thresholding flex point with the change of operating current；The operating current of laser by
Ibias, Imod two parts coordinate；The luminous efficiency of laser reduces with the rise of operating ambient temperature.
Determine that laser works electric current high/low temperature penalty coefficient A operating process makes high/low temperature for initial workpiece and tested in step 3)
Testing process is demonstrate,proved, the initial workpiece makes high/low temperature validation test flow and comprised the following steps：
A) photoelectric conversion module, is assembled, light eye pattern, penalty coefficient have been debugged by index request under 25 DEG C of environment of room temperature
0.2 is preset as, and is cured in MCU FLASH；According to the extinction ratio index debugging Imod_25 of initial workpiece requirement, and it is cured to
In MCU FLASH；
B) photoelectric conversion module for having debugged light eye pattern, is put into high-low temperature chamber, verifies that the extinction ratio under hot environment becomes
Change, penalty coefficient A is changed by the method for Step wise approximation, until meeting that extinction ratio change is less than 1dB；
The extinction ratio calculation formula is：
Er=10Log (P1/P0)
In formula：Er is the extinction ratio of optical module, and for P1 to there is luminous power, P0 is no optical power；
C), verify the extinction ratio change of new penalty coefficient at low ambient temperatures, it is qualified then confirm penalty coefficient A and
Imod_25, and arrange to MCU and download in firmware, prepare burning during batch making and use；
Step wise approximation modification penalty coefficient A method comprises the following steps in step b)：
B1), as high temperature extinction ratio 1dB bigger than normal temperature, penalty coefficient A is changed, penalty coefficient A is reduced 0.01 and solidifies
Into MCU FLASH；
B2), as high temperature extinction ratio 1dB smaller than normal temperature, penalty coefficient A is changed, penalty coefficient A is increased 0.01, and it is solid
Change into MCU FLASH；
B3), low-temperature test checking penalty coefficient A, ensure that extinction ratio change is less than 1dB；
B4), confirm penalty coefficient A, arrange penalty coefficient A and Imod_25 data into MCU firmwares；
Photoelectric conversion module temperature compensation software workflow comprises the following steps in step 3)：
31), electricity, MCU power-up initializings, resource distribution on photoelectric conversion module；
32), be delayed 10mS, laser drive circuit Initialize installation；
33), be delayed 5mS, temperature sampling, when temperature change is more than 2 DEG C, reads Ibias_25 arranges values, reads Ibias_t
Value, bias current compensation changing value △ Ibias are calculated by software algorithm：
△ Ibias=Ibias_t-Ibias_25
Calculate modulation electric current high/low temperature compensation changing value △ Imod：
△ Imod=A* △ Ibias
34) Imod_25 values, are read, calculate Imod_t values：
Imod_t=Imod_25+ △ Imod
35), the Imod_t values of calculating are configured to the modulation electric current Imod of laser drive circuit；
36), DDM monitoring datas refresh；
37), abnormal operation monitoring management, into next temperature sampling step, circulate successively；
Step 36) is directly entered when temperature change is not more than 2 DEG C in step 33)；
Step 32), step 33) delay be not when reaching requirement, is both needed to delay etc. until corresponding delay requirement；
Photoelectric conversion module makes debugging and comprised the following steps in step 4)：
41), the I2C communication connections of PC softwares, under 25 DEG C of environment of room temperature, adjust the current value of laser drive circuit
Ibias debugs light eye pattern；
If 42), light eye pattern extinction ratio is unqualified, the electricity of laser drive circuit need to be adjusted again under 25 DEG C of environment of room temperature
Flow valuve Ibias debugs light eye pattern；
If 43), light eye pattern extinction ratio is qualified, the Ibias_t values of photoelectric conversion module are read, Ibias_t values are assigned to
Ibias_25 values, Ibias_25 values are burnt to corresponding FLASH spaces storage solidification；Ibias_25 value burnings terminate；
44), 2S delays post debugging, which makes, terminates, and after changing photoelectric conversion module, carries out new module making debugging；
Step 6) batch photoelectric conversion module Making programme comprises the following steps：
61), according to Order creation initial workpiece photoelectric conversion module；
62), initial workpiece product high/low temperature test determines high/low temperature penalty coefficient A and Imod_25 preset value；
63), determine and check to download firmware binaries recordable paper；With the printed circuit board (PCB) that electronic component is welded
PCBA firmware burnings；Photoelectric conversion module optical device welding assembly；Pass through PC software debugging light eye patterns；
64), batch photoelectric conversion module Making programme terminates.
The present invention realizes that photoelectric conversion module extinction ratio varies with temperature automatic compensation control by software algorithm, it is not necessary to
Sampled one by one by temperature spot and establish look-up table LUT data, also without repeatedly debugging under hot environment in mass manufacturing process
Process, the full temperature work photoelectric properties index of product can be ensured completely.So high speed optoelectronic modulus of conversion designed with the present invention
Block batch making process is simple, and production efficiency is substantially improved, and can be that factory bring direct economic benefit, stable work in work,
Uniformity is excellent, more conducively marketing.
Claims (7)
- A kind of 1. photoelectric conversion module extinction ratio autocontrol method, it is characterised in that：Photoelectric conversion module includes master controller MCU, laser driving, limiting amplifier, photoelectric conversion module electrical interface, reception optical assembly ROSA and transmitting optical assembly TOSA, The reception optical assembly ROSA, limiting amplifier, photoelectric conversion module electrical interface, laser driving and transmitting optical assembly TOSA are suitable Secondary to connect, master controller MCU connects with photoelectric conversion module electrical interface, limiting amplifier, laser driving respectively；Photoelectric conversion module, which makes, to be comprised the following steps：1), photoelectric conversion module hardware circuit design：From laser driving plus the two-in-one integrated circuit of limiting amplifier, C8051F336 single-chip microcomputers, carry hardware luminous power and automatically control APC circuits, realize that single-chip microcomputer is integrated to high speed by I2C communications The management configuration of chip internal work register, realize that software controls in real time；2), photoelectric conversion module makes test circuit design：Photoelectric conversion module and test circuit are exchanged by I2C communication interfaces Data, test circuit and PC exchange data by USB communication interface；3), photoelectric conversion module temperature compensation Software for Design：With general C language to C8051F336 mcu programmings, by opto-electronic conversion Module temperature compensation software flow writes subprogram, realizes that control is repaid in the full temperature compensation to photoelectric conversion module；It is described in detail below：The algorithmic formula of temperature-compensating：Imod_t=Imod_25+A* (Ibias_t-Ibias_25)；In formula：Imod_25 is 25 degree of modulation electric current；Imod_t is modulation electric current in real time；Ibias_25 is 25 degree of Ibias Electric current；Ibias_t is real-time Ibias electric currents；A is laser works electric current high/low temperature penalty coefficient；For the laser initial workpiece work light eye pattern test checking of different batches, the Imod electric currents of laser at 25 degrees c are set simultaneously As Imod_25 assignment, MCU FLASH fixed positions are pre-deposited, each optical module re-powers can be from FLASH's Correspondence position calls the RAM to MCU to be used to calculate compensation in real time；The penalty coefficient A of laser is previously written MCU FLASH fixed positions, writes FLASH's during optical module power-up initializing The RAM that penalty coefficient A calls in MCU uses to calculate compensation in real time；Other running parameters of optical module are set also in initialization procedure In deposit MCU RAM are recalled by FLASH, and deposit is operated to GN1411A by MCU and GN1411A I2C communication simultaneously Device configures；4), photoelectric conversion module makes debugging software design：The upper debugging software flows of PC applied in manufacturing process, according to The flow writes software, and employee realizes debugging and the photoelectric conversion module of light eye pattern by the execution shirtsleeve operation of PC operation interfaces The burning solidification of key job parameter；5), batch photoelectric conversion module makes debugging software design：Upper PC softwares are developed with C# language, with the software of step 4) Flow, the interface Dynamic link library program that loading CH431 is provided, realize between PC host computers and the embedded slave computer of photoelectric conversion module Data exchange；6), batch photoelectric conversion module Making programme designs：According to initial workpiece manufacturing process temperature penalty coefficient A, setting Imod_25 is simultaneously arranged into download firmware；By the batch making flow of photoelectric conversion module, firmware download configuration set after Under 25 DEG C of environment of room temperature, optical module works on power and adjusts light eye pattern, passes through room temperature environment of the upper software at PC ends at 25 DEG C The light eye pattern of lower adjusting module, while index is adjusted by ophthalmograp synchronization monitoring light eye pattern, light eye pattern is adjusted to product rule The optimum state of lattice book requirement；Stop upper software delays 1~2 second after adjusting, the Ibias that delay terminates rear retaking of a year or grade optical module is real Border working current value is assigned to Ibias_25, and Ibias_25 value is stored in MCU RAM and FLASH fixed positions；Data are deposited After storage terminates, upper software delays 2~3 seconds, display photoelectric conversion module, which makes debugging, to be terminated；Determine that laser works electric current high/low temperature penalty coefficient A operating process makes high/low temperature for initial workpiece and tested in the step 3) Testing process is demonstrate,proved, the initial workpiece makes high/low temperature validation test flow and comprised the following steps：A) photoelectric conversion module, is assembled, has debugged light eye pattern by index request under 25 DEG C of environment of room temperature, penalty coefficient is preset For 0.2, and it is cured in MCU FLASH；According to the extinction ratio index debugging Imod_25 of initial workpiece requirement, and it is cured to MCU's In FLASH；B) photoelectric conversion module for having debugged light eye pattern, is put into high-low temperature chamber, the extinction ratio change under hot environment is verified, presses The method modification penalty coefficient A of Step wise approximation, until meeting that extinction ratio change is less than 1dB；The extinction ratio calculation formula is：Er=10Log (P1/P0)In formula：Er is the extinction ratio of optical module, and for P1 to there is luminous power, P0 is no optical power；C) the extinction ratio change of new penalty coefficient at low ambient temperatures, is verified, it is qualified then to confirm penalty coefficient A and Imod_25, And arrange to MCU and download in firmware, prepare burning during batch making and use.
- 2. photoelectric conversion module extinction ratio autocontrol method according to claim 1, it is characterised in that：The step b) Middle Step wise approximation modification penalty coefficient A method comprises the following steps：B1), as high temperature extinction ratio 1dB bigger than normal temperature, penalty coefficient A is changed, penalty coefficient A is reduced 0.01 and is cured to In MCU FLASH；B2), as high temperature extinction ratio 1dB smaller than normal temperature, penalty coefficient A is changed, penalty coefficient A is increased 0.01, and be cured to In MCU FLASH；B3), low-temperature test checking penalty coefficient A, ensure that extinction ratio change is less than 1dB；B4), confirm penalty coefficient A, arrange penalty coefficient A and Imod_25 data into MCU firmwares.
- 3. photoelectric conversion module extinction ratio autocontrol method according to claim 1, it is characterised in that：The step 3) Middle photoelectric conversion module temperature compensation software workflow comprises the following steps：31), electricity, MCU power-up initializings, resource distribution on photoelectric conversion module；32), be delayed 10mS, laser drive circuit Initialize installation；33), be delayed 5mS, temperature sampling, when temperature change is more than 2 DEG C, reads Ibias_25 arranges values, reads Ibias_t values, Bias current compensation changing value △ Ibias are calculated by software algorithm：△ Ibias=Ibias_t-Ibias_25Calculate modulation electric current high/low temperature compensation changing value △ Imod：△ Imod=A* △ Ibias34) Imod_25 values, are read, calculate Imod_t values：Imod_t=Imod_25+ △ Imod35), the Imod_t values of calculating are configured to the modulation electric current Imod of laser drive circuit；36), DDM monitoring datas refresh；37), abnormal operation monitoring management, into next temperature sampling step, circulate successively.
- 4. photoelectric conversion module extinction ratio autocontrol method according to claim 3, it is characterised in that：The step 33) step 36) is directly entered when temperature change is not more than 2 DEG C in.
- 5. photoelectric conversion module extinction ratio autocontrol method according to claim 3, it is characterised in that：The step 32), step 33) delay is not when reaching requirement, is both needed to delay etc. until corresponding delay requirement.
- 6. photoelectric conversion module extinction ratio autocontrol method according to claim 1, it is characterised in that：Light in step 4) Electric modular converter makes debugging and comprised the following steps：41), the I2C communication connections of PC softwares, under 25 DEG C of environment of room temperature, the current value Ibias for adjusting laser drive circuit is adjusted Try light eye pattern；If 42), light eye pattern extinction ratio is unqualified, the current value of laser drive circuit need to be adjusted again under 25 DEG C of environment of room temperature Ibias debugs light eye pattern；If 43), light eye pattern extinction ratio is qualified, the Ibias_t values of photoelectric conversion module are read, Ibias_t values are assigned to Ibias_25 values, Ibias_25 values are burnt to corresponding FLASH spaces storage solidification；Ibias_25 value burnings terminate；44), 2S delays post debugging, which makes, terminates, and after changing photoelectric conversion module, carries out new module making debugging.
- 7. the photoelectric conversion module extinction ratio autocontrol method according to claim 1-6 any one, it is characterised in that： Step 6) the batch photoelectric conversion module Making programme comprises the following steps：61), according to Order creation initial workpiece photoelectric conversion module；62), initial workpiece product high/low temperature test determines high/low temperature penalty coefficient A and Imod_25 preset value；63), determine and check to download firmware binaries recordable paper；PCBA firmware burnings；Photoelectric conversion module optical device welds Assembling；Pass through PC software debugging light eye patterns；64), batch photoelectric conversion module Making programme terminates.
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| CN107690759B (en) | 2017-08-25 | 2020-05-12 | 索尔思光电（成都）有限公司 | Optical module, optical module system and monitoring method of optical module |
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| CN111934758B (en) * | 2020-07-28 | 2022-03-25 | 长飞光纤光缆股份有限公司 | Automatic adjusting and measuring method and device for emitted light power and eye pattern of optical module |
| CN112104424B (en) * | 2020-09-03 | 2022-04-01 | 南京捷澳德信息科技有限公司 | High-temperature extinction ratio optimization method for 5G forward-transmission industrial-grade optical module |
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