CN105656562A - Automatic control method for extinction ratio of photovoltaic conversion module - Google Patents
Automatic control method for extinction ratio of photovoltaic conversion module Download PDFInfo
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- CN105656562A CN105656562A CN201610159356.9A CN201610159356A CN105656562A CN 105656562 A CN105656562 A CN 105656562A CN 201610159356 A CN201610159356 A CN 201610159356A CN 105656562 A CN105656562 A CN 105656562A
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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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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F8/00—Arrangements for software engineering
- G06F8/40—Transformation of program code
- G06F8/41—Compilation
- G06F8/44—Encoding
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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
- H04B10/564—Power control
Abstract
The invention discloses an automatic control method for the extinction ratio of a photovoltaic conversion module. The photovoltaic conversion module comprises a main control unit (MCU), a laser driver, a limiting amplifier, a photovoltaic-conversion-module electrical interface, a light receiving assembly (ROSA) and a light emitting assembly (TOSA). The ROSA, the limiting amplifier, the photovoltaic-conversion-module electrical interface, the laser driver and the TOSA are sequentially connected, and the MCU is respectively connected with the photovoltaic-conversion-module electrical interface, the limiting amplifier and the laser driver. The automatic control method is simple in manufacturing technology, convenient and efficient, and time occupied by a device is shortened; the consistency of the extinction ratio of mass-manufactured photovoltaic conversion modules is high, and the quality of high-speed products can be better guaranteed.
Description
Technical field
The present invention relates to optical communication field, particularly relate to a kind of photoelectric conversion module extinction ratio autocontrol method.
Background technology
Fiber optic communication is more and more extensive in industrial control field application, and the operating characteristic of laser instrument technical grade (-40��85 DEG C) environment determines photoelectric conversion module long-term work fault rate in high temperature environments and improves. High temperature resistant and mature and stable photoelectric conversion module has become industry attractable point, the emphasis of marketing. Extinction ratio is required height by high speed optoelectronic modular converter, and extinction ratio adjusting range is narrow. Due to the discreteness of laser instrument in batch production, certainly will cause that the extinction ratio concordance of photoelectric conversion module is difficult in batch making and control.
Problem of the prior art and shortcoming: the laser instrument of high speed optoelectronic modular converter varies with temperature the compensation adjustment needing to be operated electric current, current mainstream scheme is that master controller MCU is realized by lookup table data LUT (LookUpTable). in product batch making process, initial workpiece makes the transmitting luminous power first adjusting photoelectric conversion module according to design objective, again the photoelectric conversion module having debugged luminous power is put into high/low temperature circulating box to be operated by the upper software of computer, extinction ratio debugging sampling is carried out from-40 DEG C to 85 DEG C every 10 DEG C, the modulation electric current of each sampled point is carried out corresponding record one by one by host computer, lookup table data LUT is become by smoothing algorithm by every 2 DEG C one some respective production by the upper computer software of computer after having sampled, finally this look-up table data just makes the photoelectric conversion module high/low temperature operating current configuration data of order as this batch. it is discrete owing to laser instrument batch existing certain operating characteristic, configure unified look-up table data and can not meet the high/low temperature compensation needs of all photoelectric conversion modules under high/low temperature, the extinction ratio index of minority photoelectric conversion module is defective under high/low temperature, particularly obvious under high temperature.
So, in order to ensure the full temperature index of photoelectric conversion module, the making of photoelectric conversion module increases operation, and manufacturing process meets the high-performance of product by increasing high temperature test second-order correction penalty coefficient. The first step, is cured to the lookup table data LUT of initial workpiece collection in the nonvolatile memory corresponding for ImodLUT of photoelectric conversion module by computer upper software burning, and to module, at room temperature the light eye pattern of (25 DEG C) is debugged;Second step, the photoelectricity revolving die block batch at room temperature debugged is placed in the baking oven of 85 DEG C of high temperature, after storing 20 minutes, light eye pattern index is launched in test in high temperature environments, the photoelectric conversion module that extinction ratio change is exceeded standard is by computer host computer amendment form penalty coefficient, and be cured in the nonvolatile memory of correspondence, it is ensured that within the scope of optical module total temperature, performance indications are qualified. The efficiency of above manufacturing process is low, time-consuming takes a lot of work, and is difficult to meet high-volume and makes demand.
Summary of the invention
Goal of the invention: for overcoming prior art not enough, purport of the present invention is in providing a kind of photoelectric conversion module extinction ratio autocontrol method.
Technical scheme: for solving above-mentioned technical problem, the present invention adopts the following technical scheme that
A kind of photoelectric conversion module extinction ratio autocontrol method, photoelectric conversion module includes master controller MCU, Laser Drive, limiting amplifier, photoelectric conversion module electrical interface, receives optical assembly ROSA and launch optical assembly TOSA, described reception optical assembly ROSA, limiting amplifier, photoelectric conversion module electrical interface, Laser Drive and transmitting optical assembly TOSA sequentially connect, and master controller MCU connects with photoelectric conversion module electrical interface, limiting amplifier, Laser Drive respectively;
Photoelectric conversion module makes and comprises the following steps:
1), photoelectric conversion module hardware circuit design: select Laser Drive to add the two-in-one integrated circuit of limiting amplifier, C8051F336 single-chip microcomputer, carry hardware luminous power and automatically control APC circuit, realize the single-chip microcomputer management to high speed integrated chip internal work depositor by I2C communication to configure, it is achieved software controls in real time;
2), photoelectric conversion module makes test circuit design: photoelectric conversion module and test circuit are by I2C communication interface exchange data, and test circuit and PC exchange data by USB communication interface;
3), photoelectric conversion module temperature compensation software design: by general C language to C8051F336 mcu programming, write subprogram by photoelectric conversion module temperature compensation software flow, it is achieved control is repaid in the full temperature compensation of 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 the modulation electric current of 25 degree; Imod_t is real-time modulation electric current; Ibias_25 is the Ibias electric current of 25 degree; Ibias_t is real-time Ibias electric current; A is laser works electric current high/low temperature penalty coefficient;
Laser instrument initial workpiece work light eye pattern test checking for different batches, laser instrument Imod electric current at 25 degrees c the assignment as Imod_25 are set, pre-depositing the FLASH fixed position of MCU, each optical module re-powers and can call the RAM of MCU for calculating compensation use in real time from the correspondence position of FLASH;
The penalty coefficient A of laser instrument is previously written the FLASH fixed position of MCU, and during optical module power-up initializing, the penalty coefficient A of write FLASH calls in the RAM of MCU for calculating compensation use in real time; Other running parameter of optical module arranges also to be recalled by FLASH in initialization procedure and is stored in MCURAM, and by the I2C communication of MCU and GN1411A, GN1411A is operated register configuration simultaneously;
4), photoelectric conversion module makes debugging software design: the upper debugging software flow process of PC of application in manufacturing process, writing software according to this flow process, employee is solidified by the PC burning operating debugging and photoelectric conversion module key job parameter that interface execution shirtsleeve operation realizes light eye pattern;
5), batch photoelectric conversion module makes debugging software design: upper PC software C# language is developed, by step 4) software flow, load the CH431 interface Dynamic link library program provided, it is achieved the data exchange between PC host computer and the embedded slave computer of photoelectric conversion module.
6), batch photoelectric conversion module Making programme design: determine temperature compensation coefficient A according to initial workpiece manufacturing process, set Imod_25 and arrange to and download in firmware; By the batch making flow process 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, by the upper software of PC end light eye pattern of adjusting module under the room temperature environment of 25 DEG C, adjust index by ophthalmograph synchronization monitoring light eye pattern simultaneously, make light eye pattern adjust the optimum state of product specification book requirement; Upper software delays 1��2 second after stopping adjustment, time delay terminates the Ibias real work current value of rear retaking of a year or grade optical module and is assigned to Ibias_25, and the value of Ibias_25 is stored in RAM and the FLASH fixed position of MCU; After data storage terminates, upper software delays 2��3 seconds, display photoelectric conversion module makes debugging to be terminated.
Operation principle: photoelectric conversion module theory diagram of the present invention is shown in accompanying drawing 2, the signal of telecommunication of switch is transferred to the drive circuit for laser of photoelectric conversion module by the electrical interface of photoelectric conversion module, laser drive circuit drives Laser emission assembly TOSA to launch laser, and laser realizes the electrical/optical conversion of signal transmission by fiber-optic transfer to remote equipment; Realize the long range propagation of signal; Laser signal transmission in optical fiber outputs electrical signals to the further shaping of limiting amplifier to laser pick-off assembly ROSA, ROSA and amplifies the output electrical interface to photoelectric conversion module, is transferred to switch by electrical interface and realizes the optical electrical conversion of signal transmission; Main control MCU realizes the functions such as the coordinated management configuration of the management data exchange of switch and photoelectric conversion module, laser drive circuit and amplitude limiting amplifier circuit; In order to ensure the integrity of signal, the transmitting optical signal of photoelectric conversion module requires that total temperature operated within range light power stabilising, extinction ratio are stable; Light power stabilising by the luminous power automatic control circuit APC of hardware it is achieved that extinction ratio is stable realizes typically via according to temperature corresponding compensation of tabling look-up. The present invention, on the basis that original hardware structure is constant, realizes extinction ratio by software algorithm and automatically compensates control.
Preferably, described step 3) in determine that the operating process of laser works electric current high/low temperature penalty coefficient A is that initial workpiece makes high/low temperature validation test flow process, described initial workpiece makes high/low temperature validation test flow process and comprises the following steps:
A), assembling photoelectric conversion module, debugged light eye pattern by index request under 25 DEG C of environment of room temperature, penalty coefficient is preset as 0.2, and is cured in the FLASH of MCU; According to the extinction ratio index debugging Imod_25 that initial workpiece requires, and it is cured in the FLASH of MCU;
B) high-low temperature chamber, the photoelectric conversion module having debugged light eye pattern is put into, the extinction ratio change under checking hot environment, revising penalty coefficient A by the method for Step wise approximation, changing less than 1dB until meeting extinction ratio;
Described extinction ratio computing formula is:
Er=10Log (P1/P0)
In formula: Er is the extinction ratio of optical module, P1 is for there being luminous power, and P0 is no optical power;
C), verify the extinction ratio change at low ambient temperatures of new penalty coefficient, qualified then confirmation penalty coefficient A and Imod_25, and arrange in MCU download firmware, prepare burning during batch making and use.
Preferably, in described step b), the method for Step wise approximation amendment penalty coefficient A comprises the following steps:
B1), as high temperature extinction ratio 1dB bigger than room temperature, revise penalty coefficient A, make penalty coefficient A reduce 0.01 and be cured in the FLASH of MCU;
B2), as high temperature extinction ratio 1dB less of room temperature, revise penalty coefficient A, make penalty coefficient A increase 0.01, and be cured in the FLASH of MCU;
B3), low-temperature test checking penalty coefficient A, it is ensured that extinction ratio changes less than 1dB;
B4), confirm penalty coefficient A, arrange penalty coefficient A and Imod_25 data in MCU firmware.
Generating laser operating current software automation in order to enable photoelectric conversion module in total temperature working range controls process, controls to ensure to launch within the scope of total temperature light eye pattern qualified by software automation; Described step 3) in photoelectric conversion module temperature compensation software workflow comprise the following steps:
31), photoelectric conversion module power on, MCU power-up initializing, resource distribution;
32), time delay 10mS, laser drive circuit Initialize installation;
33), time delay 5mS, temperature sampling, when variations in temperature is more than 2 DEG C, reads Ibias_25 and value be set, read Ibias_t value, by software algorithm calculating bias current compensation changing value �� Ibias:
�� Ibias=Ibias_t-Ibias_25
Calculate modulation electric current high/low temperature and compensate changing value �� Imod:
�� Imod=A* �� Ibias
34), read Imod_25 value, calculate Imod_t value:
Imod_t=Imod_25+ �� Imod
35), the Imod_t value calculated is configured to the modulation electric current Imod of laser drive circuit;
36), DDM monitors Refresh Data;
37), abnormal operation monitoring management, enter next temperature sampling step, circulate successively.
Preferably, described step 33) in variations in temperature be directly entered step 36 when being not more than 2 DEG C).
Preferably, described step 32), step 33) time delay do not reach when requiring, is both needed to time delay etc. until the delay requirement of correspondence.
In order to enable the upper debugging software flow process of PC of application in manufacturing process, writing software according to this flow process, employee is solidified by the PC burning operating debugging and photoelectric conversion module key job parameter that interface execution shirtsleeve operation realizes light eye pattern; Described step 4) in photoelectric conversion module make debugging comprise the following steps:
41), the I2C of PC software communication connection, under 25 DEG C of environment of room temperature, the current value Ibias adjusting laser drive circuit debugs light eye pattern;
42) if light eye pattern extinction ratio is defective, needing again under 25 DEG C of environment of room temperature, the current value Ibias adjusting laser drive circuit debugs light eye pattern;
43) if light eye pattern extinction ratio is qualified, reading the Ibias_t value of photoelectric conversion module, Ibias_t value is assigned to Ibias_25 value, FLASH space storage Ibias_25 value being burnt to correspondence solidifies; Ibias_25 value burning terminates;
44), 2S time delay post debugging make and terminate, change after photoelectric conversion module, carry out new module making debugging.
In order to enable whole manufacturing process from raw material to assembly and adjustment, procedure arrangement; Described step 6) batch photoelectric conversion module Making programme comprise the following steps:
61), according to Order creation initial workpiece photoelectric conversion module;
62), high/low temperature penalty coefficient A and Imod_25 preset value are determined in the test of initial workpiece product high/low temperature;
63), determine and check download firmware binaries recordable paper; PCBA firmware burning; Photoelectric conversion module optical device welding assembly;By PC software debugging light eye pattern;
64), batch photoelectric conversion module Making programme terminates.
The NM technology of the present invention is prior art.
Beneficial effect: 1, the photoelectric conversion module of present invention design is before batch making, temperature compensation coefficient A, Imod_25 preset value the burning first test of initial workpiece production phase determined is cured in the FLASH memory of master controller distribution, light eye pattern debugging process is operated by the running background of upper software, real-time tracking eye pattern debugging mode gather Ibias_25 value and be burnt to the FLASH memory of photoelectric conversion module in persistence, it is ensured that the Performance optimization of every module. Whole smooth eye pattern debugging process is the same with making debugging operation under 25 DEG C of environment of low speed mill run room temperature, adjusts light eye pattern and waits that upper PC software certification terminates; The whole making debugging process of photoelectric conversion module adopting the invention carries out under 25 DEG C of environment of room temperature, and former utilization LUT method of tabling look-up makes and needs every batch of device initial workpiece high/low temperature to build table, if to ensure that the full technical grade temperature stabilization of extinction ratio of product must also carry out 100% high-temperature baking second-order correction in critical field; So, compare its processing technology of prior art simple, convenience and high-efficiency, shorten the equipment holding time;
2, the product extinction ratio concordance that the photoelectric conversion module high-volume of the invention design makes is high, more can guarantee that high-speed product quality.
Accompanying drawing explanation
Fig. 1 is the P-I curve of laser instrument of the present invention;
Fig. 2 is photoelectric conversion module theory diagram of the present invention.
Detailed description of the invention
In order to be more fully understood that the present invention, it is further elucidated with present disclosure below in conjunction with embodiment, but present disclosure 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 includes master controller MCU, Laser Drive, limiting amplifier, photoelectric conversion module electrical interface, receives optical assembly ROSA and launch optical assembly TOSA, described reception optical assembly ROSA, limiting amplifier, photoelectric conversion module electrical interface, Laser Drive and transmitting optical assembly TOSA sequentially connect, and master controller MCU connects with photoelectric conversion module electrical interface, limiting amplifier, Laser Drive respectively;
Photoelectric conversion module makes and comprises the following steps:
1), photoelectric conversion module hardware circuit design: according to the photoelectric conversion module theory diagram of Fig. 2, selecting the high speed integrated chip GN1411A that SEMTECH company produces, C8051F336 selected by single-chip microcomputer. GN1411A chip is that a Laser Drive adds the two-in-one integrated circuit of limiting amplifier, carry hardware luminous power and automatically control (APC) circuit, the single-chip microcomputer C8051F336 management to GN1411A internal work depositor can be realized by I2C communication to configure, it is achieved software controls in real time;
2), photoelectric conversion module makes test circuit design: photoelectric conversion module and test circuit are by I2C communication interface exchange data, and test circuit and PC exchange data by USB communication interface. USB turn I2C circuit select Nanjing ooze Hang Seng produce CH431 private communication protocol converter ic;
3), photoelectric conversion module temperature compensation software design: by general C language to C8051F336 mcu programming, write subprogram by photoelectric conversion module temperature compensation software flow, it is achieved control is repaid in the full temperature compensation of 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 the modulation electric current of 25 degree; Imod_t is real-time modulation electric current; Ibias_25 is the Ibias electric current of 25 degree; Ibias_t is real-time Ibias electric current; A is laser works electric current high/low temperature penalty coefficient;
Laser instrument initial workpiece work light eye pattern test checking for different batches, laser instrument Imod electric current at 25 degrees c the assignment as Imod_25 are set, pre-depositing the FLASH fixed position of MCU, each optical module re-powers and can call the RAM of MCU for calculating compensation use in real time from the correspondence position of FLASH;
The penalty coefficient A of laser instrument is previously written the FLASH fixed position of MCU, and during optical module power-up initializing, the penalty coefficient A of write FLASH calls in the RAM of MCU for calculating compensation use in real time; Other running parameter of optical module arranges also to be recalled by FLASH in initialization procedure and is stored in MCURAM, and by the I2C communication of MCU and GN1411A, GN1411A is operated register configuration simultaneously;
4), photoelectric conversion module makes debugging software design: the upper debugging software flow process of PC of application in manufacturing process, writing software according to this flow process, employee is solidified by the PC burning operating debugging and photoelectric conversion module key job parameter that interface execution shirtsleeve operation realizes light eye pattern;
5), batch photoelectric conversion module makes debugging software design: upper PC software C# language is developed, by step 4) software flow, load the CH431 interface Dynamic link library program provided, it is achieved the data exchange between PC host computer and the embedded slave computer of photoelectric conversion module.
6), batch photoelectric conversion module Making programme design: determine temperature compensation coefficient A according to initial workpiece manufacturing process, set Imod_25 and arrange to and download in firmware; By the batch making flow process 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, by the upper software of PC end light eye pattern of adjusting module under the room temperature environment of 25 DEG C, adjust index by ophthalmograph synchronization monitoring light eye pattern simultaneously, make light eye pattern adjust the optimum state of product specification book requirement; Upper software delays 1��2 second after stopping adjustment, time delay terminates the Ibias real work current value of rear retaking of a year or grade optical module and is assigned to Ibias_25, and the value of Ibias_25 is stored in RAM and the FLASH fixed position of MCU; After data storage terminates, upper software delays 2��3 seconds, display photoelectric conversion module makes debugging to be terminated.
As it is shown in figure 1, the P-I curve of laser instrument, the operating current of main corresponding laser instrument and transmitting luminous power relation. It can be seen that following characteristics: laser instrument luminescence has individual thresholding flex point with the change of operating current; The operating current of laser instrument is with Ibias, Imod two parts; The luminous efficiency of laser instrument reduces with the rising of operating ambient temperature.
Step 3) in determine that the operating process of laser works electric current high/low temperature penalty coefficient A is that initial workpiece makes high/low temperature validation test flow process, described initial workpiece makes high/low temperature validation test flow process and comprises the following steps:
A), assembling photoelectric conversion module, debugged light eye pattern by index request under 25 DEG C of environment of room temperature, penalty coefficient is preset as 0.2, and is cured in the FLASH of MCU; According to the extinction ratio index debugging Imod_25 that initial workpiece requires, and it is cured in the FLASH of MCU;
B) high-low temperature chamber, the photoelectric conversion module having debugged light eye pattern is put into, the extinction ratio change under checking hot environment, revising penalty coefficient A by the method for Step wise approximation, changing less than 1dB until meeting extinction ratio;
Described extinction ratio computing formula is:
Er=10Log (P1/P0)
In formula: Er is the extinction ratio of optical module, P1 is for there being luminous power, and P0 is no optical power;
C), verify the extinction ratio change at low ambient temperatures of new penalty coefficient, qualified then confirmation penalty coefficient A and Imod_25, and arrange in MCU download firmware, prepare burning during batch making and use;
In step b), the method for Step wise approximation amendment penalty coefficient A comprises the following steps:
B1), as high temperature extinction ratio 1dB bigger than room temperature, revise penalty coefficient A, make penalty coefficient A reduce 0.01 and be cured in the FLASH of MCU;
B2), as high temperature extinction ratio 1dB less of room temperature, revise penalty coefficient A, make penalty coefficient A increase 0.01, and be cured in the FLASH of MCU;
B3), low-temperature test checking penalty coefficient A, it is ensured that extinction ratio changes less than 1dB;
B4), confirm penalty coefficient A, arrange penalty coefficient A and Imod_25 data in MCU firmware;
Step 3) in photoelectric conversion module temperature compensation software workflow comprise the following steps:
31), photoelectric conversion module power on, MCU power-up initializing, resource distribution;
32), time delay 10mS, laser drive circuit Initialize installation;
33), time delay 5mS, temperature sampling, when variations in temperature is more than 2 DEG C, reads Ibias_25 and value be set, read Ibias_t value, by software algorithm calculating bias current compensation changing value �� Ibias:
�� Ibias=Ibias_t-Ibias_25
Calculate modulation electric current high/low temperature and compensate changing value �� Imod:
�� Imod=A* �� Ibias
34), read Imod_25 value, calculate Imod_t value:
Imod_t=Imod_25+ �� Imod
35), the Imod_t value calculated is configured to the modulation electric current Imod of laser drive circuit;
36), DDM monitors Refresh Data;
37), abnormal operation monitoring management, enter next temperature sampling step, circulate successively;
Step 33) in variations in temperature be directly entered step 36 when being not more than 2 DEG C);
Step 32), step 33) time delay do not reach when requiring, is both needed to time delay etc. until the delay requirement of correspondence;
Step 4) in photoelectric conversion module make debugging comprise the following steps:
41), the I2C of PC software communication connection, under 25 DEG C of environment of room temperature, the current value Ibias adjusting laser drive circuit debugs light eye pattern;
42) if light eye pattern extinction ratio is defective, needing again under 25 DEG C of environment of room temperature, the current value Ibias adjusting laser drive circuit debugs light eye pattern;
43) if light eye pattern extinction ratio is qualified, reading the Ibias_t value of photoelectric conversion module, Ibias_t value is assigned to Ibias_25 value, FLASH space storage Ibias_25 value being burnt to correspondence solidifies; Ibias_25 value burning terminates;
44), 2S time delay post debugging make and terminate, change after photoelectric conversion module, carry out new module making debugging;
Step 6) batch photoelectric conversion module Making programme comprise the following steps:
61), according to Order creation initial workpiece photoelectric conversion module;
62), high/low temperature penalty coefficient A and Imod_25 preset value are determined in the test of initial workpiece product high/low temperature;
63), determine and check download firmware binaries recordable paper; With the printing board PCB A firmware burning having welded electronic devices and components; Photoelectric conversion module optical device welding assembly; By PC software debugging light eye pattern;
64), batch photoelectric conversion module Making programme terminates.
The present invention realizes photoelectric conversion module extinction ratio by software algorithm and varies with temperature and automatically compensate control, need not sample one by one by temperature spot and set up look-up table LUT data, also without repeating debugging operation under hot environment in mass manufacturing process, can ensure that the full temperature work photoelectric properties index of product completely.So, simple by the high speed optoelectronic modular converter batch making operation of present invention design, production efficiency is substantially improved, it is possible to bringing direct economic benefit for factory, stable work in work, concordance are excellent, are more conducive to marketing.
Claims (8)
1. a photoelectric conversion module extinction ratio autocontrol method, it is characterized in that: photoelectric conversion module includes master controller MCU, Laser Drive, limiting amplifier, photoelectric conversion module electrical interface, receives optical assembly ROSA and launch optical assembly TOSA, described reception optical assembly ROSA, limiting amplifier, photoelectric conversion module electrical interface, Laser Drive and transmitting optical assembly TOSA sequentially connect, and master controller MCU connects with photoelectric conversion module electrical interface, limiting amplifier, Laser Drive respectively;
Photoelectric conversion module makes and comprises the following steps:
1), photoelectric conversion module hardware circuit design: select Laser Drive to add the two-in-one integrated circuit of limiting amplifier, C8051F336 single-chip microcomputer, carry hardware luminous power and automatically control APC circuit, realize the single-chip microcomputer management to high speed integrated chip internal work depositor by I2C communication to configure, it is achieved software controls in real time;
2), photoelectric conversion module makes test circuit design: photoelectric conversion module and test circuit are by I2C communication interface exchange data, and test circuit and PC exchange data by USB communication interface;
3), photoelectric conversion module temperature compensation software design: by general C language to C8051F336 mcu programming, write subprogram by photoelectric conversion module temperature compensation software flow, it is achieved control is repaid in the full temperature compensation of 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 the modulation electric current of 25 degree; Imod_t is real-time modulation electric current; Ibias_25 is the Ibias electric current of 25 degree; Ibias_t is real-time Ibias electric current; A is laser works electric current high/low temperature penalty coefficient;
Laser instrument initial workpiece work light eye pattern test checking for different batches, laser instrument Imod electric current at 25 degrees c the assignment as Imod_25 are set, pre-depositing the FLASH fixed position of MCU, each optical module re-powers and can call the RAM of MCU for calculating compensation use in real time from the correspondence position of FLASH;
The penalty coefficient A of laser instrument is previously written the FLASH fixed position of MCU, and during optical module power-up initializing, the penalty coefficient A of write FLASH calls in the RAM of MCU for calculating compensation use in real time; Other running parameter of optical module arranges also to be recalled by FLASH in initialization procedure and is stored in MCURAM, and by the I2C communication of MCU and GN1411A, GN1411A is operated register configuration simultaneously;
4), photoelectric conversion module makes debugging software design: the upper debugging software flow process of PC of application in manufacturing process, writing software according to this flow process, employee is solidified by the PC burning operating debugging and photoelectric conversion module key job parameter that interface execution shirtsleeve operation realizes light eye pattern;
5), batch photoelectric conversion module makes debugging software design: upper PC software C# language is developed, by step 4) software flow, load the CH431 interface Dynamic link library program provided, it is achieved the data exchange between PC host computer and the embedded slave computer of photoelectric conversion module.
6), batch photoelectric conversion module Making programme design: determine temperature compensation coefficient A according to initial workpiece manufacturing process, set Imod_25 and arrange to and download in firmware;By the batch making flow process 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, by the upper software of PC end light eye pattern of adjusting module under the room temperature environment of 25 DEG C, adjust index by ophthalmograph synchronization monitoring light eye pattern simultaneously, make light eye pattern adjust the optimum state of product specification book requirement; Upper software delays 1��2 second after stopping adjustment, time delay terminates the Ibias real work current value of rear retaking of a year or grade optical module and is assigned to Ibias_25, and the value of Ibias_25 is stored in RAM and the FLASH fixed position of MCU; After data storage terminates, upper software delays 2��3 seconds, display photoelectric conversion module makes debugging to be terminated.
2. photoelectric conversion module extinction ratio autocontrol method according to claim 1, it is characterized in that: described step 3) in determine that the operating process of laser works electric current high/low temperature penalty coefficient A is that initial workpiece makes high/low temperature validation test flow process, described initial workpiece makes high/low temperature validation test flow process and comprises the following steps:
A), assembling photoelectric conversion module, debugged light eye pattern by index request under 25 DEG C of environment of room temperature, penalty coefficient is preset as 0.2, and is cured in the FLASH of MCU; According to the extinction ratio index debugging Imod_25 that initial workpiece requires, and it is cured in the FLASH of MCU;
B) high-low temperature chamber, the photoelectric conversion module having debugged light eye pattern is put into, the extinction ratio change under checking hot environment, revising penalty coefficient A by the method for Step wise approximation, changing less than 1dB until meeting extinction ratio;
Described extinction ratio computing formula is:
Er=10Log (P1/P0)
In formula: Er is the extinction ratio of optical module, P1 is for there being luminous power, and P0 is no optical power;
C), verify the extinction ratio change at low ambient temperatures of new penalty coefficient, qualified then confirmation penalty coefficient A and Imod_25, and arrange in MCU download firmware, prepare burning during batch making and use.
3. photoelectric conversion module extinction ratio autocontrol method according to claim 2, it is characterised in that: in described step b), the method for Step wise approximation amendment penalty coefficient A comprises the following steps:
B1), as high temperature extinction ratio 1dB bigger than room temperature, revise penalty coefficient A, make penalty coefficient A reduce 0.01 and be cured in the FLASH of MCU;
B2), as high temperature extinction ratio 1dB less of room temperature, revise penalty coefficient A, make penalty coefficient A increase 0.01, and be cured in the FLASH of MCU;
B3), low-temperature test checking penalty coefficient A, it is ensured that extinction ratio changes less than 1dB;
B4), confirm penalty coefficient A, arrange penalty coefficient A and Imod_25 data in MCU firmware.
4. photoelectric conversion module extinction ratio autocontrol method according to claim 1, it is characterised in that: described step 3) in photoelectric conversion module temperature compensation software workflow comprise the following steps:
31), photoelectric conversion module power on, MCU power-up initializing, resource distribution;
32), time delay 10mS, laser drive circuit Initialize installation;
33), time delay 5mS, temperature sampling, when variations in temperature is more than 2 DEG C, reads Ibias_25 and value be set, read Ibias_t value, by software algorithm calculating bias current compensation changing value �� Ibias:
�� Ibias=Ibias_t-Ibias_25
Calculate modulation electric current high/low temperature and compensate changing value �� Imod:
�� Imod=A* �� Ibias
34), read Imod_25 value, calculate Imod_t value:
Imod_t=Imod_25+ �� Imod
35), the Imod_t value calculated is configured to the modulation electric current Imod of laser drive circuit;
36), DDM monitors Refresh Data;
37), abnormal operation monitoring management, enter next temperature sampling step, circulate successively.
5. photoelectric conversion module extinction ratio autocontrol method according to claim 4, it is characterised in that: described step 33) in variations in temperature be directly entered step 36 when being not more than 2 DEG C).
6. photoelectric conversion module extinction ratio autocontrol method according to claim 4, it is characterised in that: described step 32), step 33) time delay do not reach when requiring, is both needed to time delay etc. until the delay requirement of correspondence.
7. photoelectric conversion module extinction ratio autocontrol method according to claim 1, it is characterised in that: step 4) in photoelectric conversion module make debugging comprise the following steps:
41), the I2C of PC software communication connection, under 25 DEG C of environment of room temperature, the current value Ibias adjusting laser drive circuit debugs light eye pattern;
42) if light eye pattern extinction ratio is defective, needing again under 25 DEG C of environment of room temperature, the current value Ibias adjusting laser drive circuit debugs light eye pattern;
43) if light eye pattern extinction ratio is qualified, reading the Ibias_t value of photoelectric conversion module, Ibias_t value is assigned to Ibias_25 value, FLASH space storage Ibias_25 value being burnt to correspondence solidifies; Ibias_25 value burning terminates;
44), 2S time delay post debugging make and terminate, change after photoelectric conversion module, carry out new module making debugging.
8. the photoelectric conversion module extinction ratio autocontrol method according to claim 1-7 any one, it is characterised in that: described step 6) batch photoelectric conversion module Making programme comprise the following steps:
61), according to Order creation initial workpiece photoelectric conversion module;
62), high/low temperature penalty coefficient A and Imod_25 preset value are determined in the test of initial workpiece product high/low temperature;
63), determine and check download firmware binaries recordable paper; PCBA firmware burning; Photoelectric conversion module optical device welding assembly; By PC software debugging light eye pattern;
64), batch photoelectric conversion module Making programme terminates.
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