CN116105974B - Configuration method of optical device driving parameters - Google Patents
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Abstract
The application discloses a configuration method of optical device driving parameters, which belongs to the technical field of optical device equipment, and comprises the following steps: step 100: inputting a plurality of parameter sets to a test computer to create a base data set, wherein the parameter sets include drive parameters for driving an optical device to generate an optical signal and performance parameters of the optical signal; step 200: the method comprises the steps that an optical device to be configured is mounted on a test circuit board, a test computer controls the test circuit board to write standard parameters into the optical device to be configured, judges whether an optical signal generated by the optical device is qualified, writes the standard parameters into the optical device if the optical signal is qualified, and takes down the optical device; if not, step 300 is performed, and the standard parameters are preset driving parameters. The application provides a configuration method of optical device driving parameters, which can continuously accumulate experience when configuring an optical device.
Description
Technical Field
The application relates to the technical field of optical device equipment, in particular to a configuration method of optical device driving parameters.
Background
The driving chip register configuration of the DML optical device mainly comprises three parameters of a filling current Isink, a modulating current Imod and a Cross Point. Performance metrics to be met are four metrics of Average Optical Power (AOP), extinction Ratio (ER), margin (Margin), and Cross Point (Cross Point).
In the process of production and debugging of the optical device, proper driving parameters, mainly including current filling, current modulation and crossing points, need to be written in a register of a driving chip of the optical device. When the optical device is started by the driving parameters written into the register, an optical signal with required performance can be generated, and the judging parameters for judging the performance index of the optical signal are average optical power, extinction ratio, tolerance and crossing point. Therefore, after the optical device is produced, appropriate driving parameters need to be configured in the register, so that the evaluation parameters of the optical signals generated by the optical device meet the expected requirements. These drive parameters all have an adjustment range, and when the drive parameters are configured, adjustment is required within the range of the drive parameters. Therefore, when configuring the driving parameters, the most difficult point is how to configure a set of driving parameters so that the performance parameters of the optical signals generated by driving the optical device meet the requirements after selecting a certain value for the sink current, the modulation current and the cross point.
In the existing mode, the configuration is generally performed by adopting a manual configuration mode or a configuration system is adopted to perform massive one-dimensional search for configuration, so that the configuration experience cannot be accumulated in the existing test mode, the configuration efficiency cannot be improved along with the increase of time, and the configuration efficiency of parameters is too low when a large number of driving parameters of optical devices are configured.
In view of the above, there is a lack of a method for configuring driving parameters of an optical device, which can continuously accumulate experience when configuring the optical device.
Disclosure of Invention
The summary of the application is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. The summary of the application is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter.
In order to solve the technical problems mentioned in the background section above, some embodiments of the present application provide a method for configuring driving parameters of an optical device, where the optical device is configured by a test system, the system includes a test computer, an error code meter, a test circuit board, and an eye oscilloscope; the test computer is in signal connection with the error code instrument, the test circuit board and the eye oscilloscope, the error code instrument is in signal connection with the test circuit board, and the test circuit board is in signal connection with the eye oscilloscope;
the method comprises the following steps:
step 100: inputting a plurality of parameter sets to a test computer to establish a base data set, wherein each parameter set comprises driving parameters for driving an optical device to generate an optical signal and corresponding performance parameters thereof;
step 200: the method comprises the steps that an optical device to be configured is mounted on a test circuit board, a test computer controls the test circuit board to write standard parameters into the optical device to be configured, whether the optical device is qualified or not is judged through performance parameters of optical signals generated by the optical device, and if the optical device is qualified, the configuration of the optical device is completed; if not, executing step 300; the standard parameters are a set of preset driving parameters for driving the optical device to be configured to work;
step 300: the testing computer searches n parameter sets which are nearest to the performance parameters of the optical device to be configured under the condition that standard parameters are configured, calculates the average value of the driving parameters in the n parameter sets to obtain average driving parameters, drives the optical device to be configured to generate optical signals, judges whether the optical signals generated by the optical device are qualified or not, writes the average driving parameters into the optical device if the optical signals are qualified, and takes down the optical device; if not, step 400 is performed, wherein n is a positive integer greater than 1;
step 400: the test computer adjusts the driving parameters of the optical devices to be configured one by one, and when the test computer adjusts a group of driving parameters to enable the performance parameters of the optical signals generated by the optical devices to be qualified, the driving parameters are written into the optical devices, and the optical devices are taken down; and simultaneously, inputting the group of driving parameters and the performance parameters into a basic data set of the test computer as parameter sets.
Further, the driving parameters include sink current, modulation current and crossover point; performance parameters include average optical power, extinction ratio, margin, and crossover points.
Further, step 100 includes:
step 101: mounting the optical device to be configured on a test circuit board;
step 102: inputting a group of manually configured driving parameters to a test computer, wherein the driving parameter test computer controls the test circuit board to work through the driving parameters so that the test circuit board drives the optical device to be tested to generate an optical signal;
step 103: the test computer obtains performance parameters of optical signals generated by the optical device to be configured from the eye oscilloscope, and takes the driving parameters and the performance parameters as parameter sets;
step 104: repeating steps 101-103 for several times to obtain a plurality of parameter sets, and inputting the parameter sets with qualified performance parameters into a basic data set of a test computer.
Further, step 300 includes:
step 301: the test computer reads the performance parameter A of the generated optical signal of the optical device to be configured under the environment of configuring standard parameters 0 ＝(A 01 ,A 02 ,A 03 ,A 04 ) Wherein A is 01 Is average light power A 02 Is of extinction ratio A 03 Is tolerance, A 04 Is the intersection;
step 302: the test computer reads the performance parameters A of all parameter sets in the basic data set ij I= {1,..m } j= {1,2,3,4}, where m represents the number of parameter sets in the underlying dataset.
Step 303: the test computer calculates each performance parameter A by adopting Euclidean distance ij And performance parameter A 0 Distance d of (2) i0 The method comprises the steps of carrying out a first treatment on the surface of the Wherein,
step 304: from all the performance parameters A ij Is selected and performance parameter A 0 The nearest n performance parameters are read out and the driving parameters B corresponding to the n performance parameters are read out nk N= {1,..n }, k= {1,2,3}, and calculating an average of the n driving parameters to obtain an average driving parameter
Step 305: the test computer controls the test circuit board to control the start of the optical device to be configured by using the average driving parameters, judges whether the optical signal generated by the optical device is qualified, and if so, writes the average parameters into the optical deviceAnd removing the optical device; if not, step 400 is performed.
Further, step 400 includes:
step 401: regulating the sum value of the current and the modulation current to enable the average optical power of the optical signal of the optical device to be configured to reach the intermediate value in the range of the average optical power so as to obtain a fixed value c of the current and the modulation current;
step 402: under the condition that the sum value of the current and the modulation current is ensured to be a fixed value c, the current and the modulation current are adjusted one by adopting a one-dimensional search method, so that a weighting function Y=alpha ER+beta margin reaches the maximum value in a qualified range, wherein alpha+beta=1, ER is an extinction ratio, and margin is a tolerance;
step 403, adjusting the intersection of the driving parameters to make the intersection of the optical signals generated by the optical device to be tested meet the requirements, and writing the obtained current, the modulation current and the intersection into the optical device to be configured; the average optical power, margin, extinction ratio, and cross-point of the obtained sink current, modulation current, cross-point, and optical signal generated by the optical device to be configured are then entered as parameter sets into a base data set.
The direct proportional relation between the average light power and the sum of the current and the modulation current is utilized, and then the sum of the current and the modulation current is determined when the average light power reaches the middle of the range, so that the average light power is not needed to be considered when the current and the modulation current are independently regulated subsequently, and only the extinction ratio and the tolerance are needed to be considered, and the regulation efficiency can be increased.
Further, the sink current, the modulation current, the margin, and the extinction ratio satisfy the following relationship in step 402:
further, step 402 specifically includes:
step 4021: setting initial values of stepping current and filling current, and setting values of alpha and beta;
step 4022: reducing the current from the initial value a times, and calculating the function value of the weighting function according to the optical signal generated by the optical device;
step 4023: reducing the current from the initial value a times, and calculating the function value of the weighting function according to the optical signal generated by the optical device;
step 4024: taking the current corresponding to the maximum value of the function values of all the weighting functions recorded in the steps 4022 and 4023 as an initial value;
step 4025: judging whether the function value of the optical signal generated after the optical device to be configured is driven is the largest function value of the optical signal generated by adding one step current to the current and the function value of the optical signal generated by subtracting one step current from the current when the current is taken as a driving parameter; if yes, executing step 4026, and if not, re-executing 4022-4025;
step 4026: and taking the initial value of the current in step 4025 and the modulation current calculated by the value of the current in the constant sum as the value for completing parameter configuration.
Further, step 4022 includes stopping performing step 4022 after the function value of the weighting function y=αer+βmargin decreases b times.
Further, step 4023 further includes stopping performing step 4022 after the function value of the weighting function y=αer+βmargin decreases b times.
Further, the method further comprises the step 500: after the parameter sets obtained in step 403 are written into the basic data, the euclidean distance calculation method of step 303 is adopted to calculate the sum value of the distances between the performance parameters in each parameter set and the performance parameters in other parameter sets, and the parameter set with the largest sum value is removed from the basic data set. By continuously updating the basic data set, the distance between the data in the basic data set is more and more similar, and the accuracy is higher and higher when the parameters of the optical device are configured by adopting a nearest neighbor method.
The application has the beneficial effects that:
three optical device configuration schemes with gradually increased difficulty are arranged when the optical device is configured, and when the optical device writes standard parameters, parameter configuration can be completed without adopting complicated second and third configuration schemes; when the optical device writes in standard parameters and cannot finish configuration, the nearest neighbor method is adopted to configure the parameters of the optical device, so that the parameter configuration of some optical devices with difficult parameter configuration can be performed; when the first and second parameter configuration schemes cannot perform parameter configuration, a third configuration scheme is adopted to adjust the driving parameters and the performance parameters one by one, so that the configuration of the driving parameters for most of the optical devices is ensured. Meanwhile, the driving parameters and the performance parameters generated in the third parameter configuration scheme can be input into a preset basic parameter set, so that along with the progress of the test, data in the basic parameter set can be more and more reference value, and further configuration experience can be increased along with the increase of configuration times.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application, are incorporated in and constitute a part of this specification. The drawings and their description are illustrative of the application and are not to be construed as unduly limiting the application.
In addition, the same or similar reference numerals denote the same or similar elements throughout the drawings. It should be understood that the figures are schematic and that elements and components are not necessarily drawn to scale.
In the drawings:
FIG. 1 is a flow chart of a method of configuring light device driving parameters;
FIG. 2 is a flow chart for building a base dataset;
FIG. 3 is a flow chart of configuring drive parameters one by one;
FIG. 4 is a flow chart of the modulation current and the sink current in configuration;
FIG. 5 is a schematic diagram of a test system.
Detailed Description
Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. It should be understood that the drawings and embodiments of the present disclosure are for illustration purposes only and are not intended to limit the scope of the present disclosure.
It should be noted that, for convenience of description, only the portions related to the present application are shown in the drawings. Embodiments of the present disclosure and features of embodiments may be combined with each other without conflict.
The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Before introducing the driving parameter configuration method of the optical device of the present application, a simple description is first made of an application scenario aimed at by this embodiment.
As shown in fig. 5, a test system is provided for configuring parameters of an optical device to be configured, the test system including a test computer, an error meter, a test circuit board, and an eye oscilloscope. The testing computer is in signal connection with the error code instrument, the testing circuit board and the eye oscilloscope, the error code instrument is in signal connection with the testing circuit board, and the testing circuit board is in signal connection with the eye oscilloscope.
The optical device to be configured is arranged on the test circuit board, the error code meter sends an electric signal to the test circuit board, the test circuit board drives the optical device to be configured to send out an optical signal after receiving the electric signal, the eye oscilloscope receives the optical signal sent out by the optical device to be configured, and then the optical signal is analyzed to obtain whether the optical device to be configured is qualified or not.
Referring to fig. 2, the configuration method of the driving parameters of the optical device provided in the present embodiment includes the following steps:
step 100: a plurality of parameter sets are input to a test computer to create a base data set, wherein each parameter set includes drive parameters for driving an optical device to generate an optical signal and corresponding performance parameters thereof.
The step 100 specifically includes:
step 101: the optical device to be configured is mounted on a test circuit board.
Step 102: and inputting a set of manually configured driving parameters into the test computer, and controlling the test circuit board to work by the test computer through the driving parameters so that the test circuit board drives the optical device to be tested to generate optical signals.
Step 103: the test computer obtains the performance parameters of the optical signals generated by the optical device to be configured from the eye oscilloscope, and takes the driving parameters and the performance parameters as parameter sets.
Step 104: repeating steps 101-103 for several times to obtain a plurality of parameter sets, and inputting the parameter sets with qualified performance parameters into a basic data set of a test computer.
In this embodiment, the driving parameters include the sink current, the modulation current, and the crossing point. Performance parameters include average optical power, extinction ratio, margin, and crossover points.
In other embodiments, other drive parameters and performance parameters may also be set.
For example, any one optical device is selected from the same batch of optical devices which need to be written with driving parameters, and the current filling, the modulation current and the crossing point are configured in a mode that the optical devices select manual configuration parameters. The manual configuration mode can be configured by directly selecting the middle mode of the parameter range. For example, the current sinking range of the optical device is 1-10 mA, and the current sinking can be set to be 5mA. The optical device is installed on the test circuit board, then the configured driving parameters are input into the test computer, and the test computer can record the performance parameters of the optical signal generated by the optical device under the condition of loading the manually configured driving parameters by reading the indication of the eye oscilloscope, and takes the driving parameters and the performance parameters as a parameter set. If a plurality of optical devices are tested, a plurality of parameter sets can be obtained, and then, the parameter sets are selected to be input into the basic data set, wherein the performance parameters meet the preset requirements.
For example, the parameter set M includes the driving parameters B 1 、B 2 、B 3 And performance parameter A 1 、A 2 、A 3 、A 4 . If the performance parameter A 1 、A 2 、A 3 、A 4 Meets the preset requirement (i.e. is qualified), then the ginsengThe data set M can be entered into the underlying data set, and otherwise it is not.
According to the technical scheme provided by the application, when the basic data set is configured, some optical devices are randomly selected from the optical devices in the same batch to perform parameter configuration in a manual configuration mode, so that a plurality of accurate parameter sets can be obtained. In practical setting, in order to increase the working efficiency, if the optical device to be configured is qualified when loading a set of driving parameters during testing, the set of driving parameters can be directly written into the optical device to increase the working efficiency.
In other embodiments, the historical parameter set may also be directly entered into the test computer as the base data set.
Step 200: the method comprises the steps that an optical device to be configured is mounted on a test circuit board, a test computer controls the test circuit board to write standard parameters into the optical device to be configured, judges whether an optical signal generated by the optical device is qualified, writes the standard parameters into the optical device if the optical signal is qualified, and takes down the optical device; if not, step 300 is performed, and the standard parameters are preset driving parameters.
The standard parameters can be intermediate values of the range of the driving parameters of the optical devices, or other values can be selected by experience, so that most optical devices in the same batch are qualified when writing preset standard parameters.
Step 300: the testing computer searches n parameter sets which are nearest to the performance parameters of the optical device to be configured under the condition that standard parameters are configured, calculates the average value of the driving parameters in the n parameter sets to obtain average driving parameters, drives the optical device to be configured to generate optical signals, judges whether the optical signals generated by the optical device are qualified or not, writes the average driving parameters into the optical device if the optical signals are qualified, and takes down the optical device; if not, step 400 is performed, where n is a positive integer greater than 1.
Step 300 specifically includes the following:
step 301: the test computer reads the performance parameter A of the generated optical signal of the optical device to be configured under the environment of configuring standard parameters 0 ＝(A 01 ,A 02 ,A 03 ,A 04 ) Wherein A is 01 Is average light power A 02 Is of extinction ratio A 03 Is tolerance, A 04 Is the intersection point.
Step 302: the test computer reads the performance parameters A of all parameter sets in the basic data set ij I= {1,..m } j= {1,2,3,4}, where m represents the number of parameter sets in the underlying dataset.
Step 303: the test computer calculates each performance parameter A by adopting Euclidean distance ij And performance parameter A 0 Distance d of (2) i0 The method comprises the steps of carrying out a first treatment on the surface of the Wherein,
step 304: from all the performance parameters A ij Is selected and performance parameter A 0 The nearest n performance parameters and reading the driving parameters Bnk, n= {1,..once, n }, k= {1,2,3}, corresponding to the n performance parameters, and calculating the average value of the n driving parameters to obtain an average parameter
Step 305: the test computer controls the test circuit board to write average parameters into the optical device to be configured Judging whether the optical signal generated by the optical device is qualified or not, and if so, writing average parameters into the optical deviceAnd removing the optical device; if not, step 400 is performed.
For example, when n is set to 10, after writing standard parameters, a certain optical device A generates an optical signal with a performance parameter of A 0 ＝(A 01 ,A 02 ,A 03 ,A 04 ). Then the Euclidean distance calculation can be used to obtain A0 and the distance d of all performance parameters in all basic data sets 10 、d 20 、d 20 、……d m0 . Then, from the m pieces of data, 10 pieces of distance data (d 10 、d 20 、d 20 、……d 100 ) Then the parameter sets M1, M2 and … … M10 for generating the 10 data are found, the driving parameters in the 10 parameter sets are extracted, and the average value of the corresponding parameters in the 10 driving parameters is calculatedThen, use the average parameter->The optical device a is driven to generate an optical signal, and if the optical signal is acceptable, the average parameter is written into the optical device a, and if the optical signal is unacceptable, step 400 is performed.
Step 400: the test computer adjusts the driving parameters of the optical devices to be configured one by one, and monitors whether the performance parameters of the optical signals generated by the optical devices are qualified or not; when the test computer adjusts to a group of driving parameters so that the performance parameters of the optical signals generated by the optical device are qualified, the driving parameters are written into a register of the optical device, and the optical device is taken down; and simultaneously, inputting the group of driving parameters and the performance parameters into a basic data set of the test computer as parameter sets.
For example, when configuring a certain optical device to be configured, the test computer adjusts the driving parameters to be B 1 、B 2 、B 2 When the test computer receives the set of driving parameters, the performance parameter A of the optical signal generated by the optical device 1 、A 2 、A 3 、A 4 When meeting the requirement, the driving parameter B 1 、B 2 、B 2 Writing to optical deviceIn the piece and the optical device is removed. At the same time, drive parameter B 1 、B 2 、B 2 And performance parameter A 1 、A 2 、A 3 、A 4 A parameter set is produced and is input into the basic data set.
Therefore, when the technical scheme provided by the application is used for carrying out parameter configuration on a large number of optical devices to be tested, a nearest neighbor method can be adopted to carry out parameter configuration on some optical devices which are difficult to be configured. Aiming at certain optical devices needing to adjust driving parameters one by one, a parameter set can be manufactured from data after the parameter adjustment is completed, the parameter set is input into a basic data set, and further more data are used as references when an average driving parameter is calculated by adopting a nearest neighbor method, so that the condition of needing to use time-consuming one by one adjustment of the driving parameters is reduced along with the test, further autonomous learning can be realized, and further the speed of configuring the driving parameters of the optical devices is faster and faster.
Referring to fig. 3, step 400 specifically includes:
step 401: and adjusting the sum value of the current filling and the modulation current to enable the average optical power of the optical signal of the optical device to be configured to reach the intermediate value in the range of the average optical power, so as to obtain the fixed value of the current filling and the modulation current sum value.
And under the condition that the current filling is set to be one half of the modulation current, adjusting the sum of the current filling value and the modulation current value to be the minimum value which accords with the parameter range, then gradually increasing the sum of the current filling and the modulation current, and taking the sum of the current filling and the modulation current obtained at the moment as a fixed value c when the average light power is detected to reach the middle value in the average light power range.
The sum of the sink current and the modulation current is in a direct proportional relationship with the average optical power, the relationship is that
3×K×I sink The value of 3 times of the sink current is the sum of the modulation current and the sink current, wherein k is related to the model of the optical device and the production lot, and a lot of tests can be performed on the optical devices in the same lot.
Step 402: under the condition that the sum value of the current and the modulation current is ensured to be a fixed value c, the current and the modulation current are adjusted one by adopting a one-dimensional search method, so that the weighting function Y=alpha ER+beta margin reaches the maximum value in a qualified range, wherein alpha+beta=1, ER is an extinction ratio, and margin is a tolerance.
The specific mode is as follows: the sink current, modulation current, tolerance and extinction ratio satisfy the following relationships:
according to the above proportional relationship, a weighting function of the margin and extinction ratio is set:
y=αer+βmargin, where α+β=1.
Thus, when the tolerance of the optical device needs to be emphasized, the value of alpha is increased, and conversely, the value of alpha is decreased.
Referring to fig. 4, step 402 specifically includes the steps of:
step 4021: initial values of the stepping current and the sinking current are set, and values of alpha and beta are set.
The initial value may be set to a minimum value in the case of satisfying the current sinking range, the stepping current is set according to the required accuracy, the higher the required accuracy is, the stepping current is reduced, and the lower the required accuracy is, the stepping current is increased.
Step 4022: step 4022: the current is reduced a times from the initial value and the function value of the weighting function is calculated from the optical signal generated by the optical device.
Step 4022 specifically includes: from the initial value of the current, the current is increased a times by the step current, the modulation current is regulated according to the sum value, the current is regulated once, the optical device is driven to start, and then the function value of the weighting function Y=alpha ER+beta margin is calculated according to the optical signal generated by the optical device.
For example, the initial value of the sink current is 5mA, the sum value c=45 mA of the sink current and the modulation current, and the stepping current is 1mA, after the sink current is increased by one stepping current, the sink current is 6mA, the modulation current is 39mA, at this time, the sink current is 6mA, the modulation current is 39mA, the light device is driven to start, and the function value of the weighting function of the light device is calculated.
Step 4022 further includes stopping performing step 4022 after the function value of the weighting function y=αer+βmargin decreases b times in succession.
Step 4022 further includes stopping performing step 4022 when the sink current and the modulation current are outside of the parameters of the optical device to be configured.
For example, a=10, b=5. If there is no case where the function value of the weighting function is continuously reduced 5 times, after repeating step 4022 ten times, the margin ratio and extinction ratio of the optical signals of 10 sets of the optical devices to be configured can be obtained.
If, after increasing to the 7 th step current, the function value of the weighting function y=αer+βmargin decreases continuously by 5 times, i.e. Y 3 ～Y 7 Is monotonically decreasing, then only 7 sets of data are naturally available.
If the sink current or the modulation current exceeds the range after increasing to the 7 th step current, the debugging cannot be performed, and only 6 sets of data can be obtained naturally.
Step 4023: the current is reduced a times from the initial value and the function value of the weighting function is calculated from the optical signal generated by the optical device.
Step 4023 specifically includes: reducing a times of current filling by the size of stepping current from the initial value of the current filling, regulating the modulation current according to the sum value each time, driving the optical device to start each time of regulating the current filling, and then calculating the function value of the weighting function Y=alpha ER+beta margin.
Step 4023 further includes stopping performing step 4022 after the function value of the weighting function y=αer+βmargin has been successively reduced b times, b < a.
Step 4023 further includes stopping performing step 4023 when the sink current and the modulation current are outside of the parameters of the optical device to be configured.
Step 4024: the current corresponding to the maximum value of the function values of all weighting functions recorded in steps 4022 and 4023 is used as an initial value.
For example, 20 sets of data Y are obtained after performing the completion of steps 4022 and 4023 1 ’、Y 2 ’、……Y 10 ’、Y 1 、Y 2 、……Y 10 . Of these 20 sets of data, Y 3 If the value of (2) is maximum, Y will be generated 3 The current sink of this data serves as an initial value.
Step 4025: judging whether the function value of the optical signal generated after the optical device to be configured is driven is the largest function value of the function values of the optical signal generated by adding one step current to the current and the optical signal generated by subtracting one step current from the current; if yes, step 4026 is performed, and if not, 4022 to 4025 are performed again.
For example, in step 4025, after the sink current is increased from the initial value by one step current and the modulation current is adjusted, the obtained weighting function value of the optical signal of the optical device to be configured is Y 3+1 After the current is reduced from the initial value by one step and the modulation current is adjusted, the weighting function value of the optical signal of the optical device to be configured is Y 3-1 . Filling current at initial value to obtain weighting function value of optical signal of optical device to be configured as Y 3 . If Y 3 Are all greater than Y 3+1 And Y 3-1 If not, step 4026 is executed, and if not, steps 4022 to 4025 need to be executed again.
Step 4026: and taking the initial value of the current in step 4025 and the modulation current calculated by the value of the current in the constant sum as the value for completing parameter configuration.
And step 403, adjusting the intersection of the driving parameters to enable the intersection of the optical signals generated by the optical device to be tested to meet the requirements, and writing the obtained filling current, the modulation current and the intersection into the optical device to be configured. The average optical power, margin, extinction ratio, and cross-point of the obtained sink current, modulation current, cross-point, and optical signal generated by the optical device to be configured are then entered as parameter sets into a base data set.
In general, the intersection of the driving parameters and the intersection of the performance parameters are in a proportional relationship, and when the intersection of the performance parameters is high, the intersection of the driving parameters is adjusted to be low, and the intersection of the driving parameters is adjusted, so that the average light power, extinction ratio and margin in the performance parameters are not greatly affected.
For example, after the setting of the sink current and the modulation current is completed; at this time, the intersection in the driving parameters is also an initial value. Assume that at this time, among the driving parameters: the sink current is a, the modulation current is b, and the intersection point is 32, wherein the sink current and the modulation current are values after the adjustment in step 402, and the intersection point 32 is the standard parameter in step 200. At this point, the set of driving parameters is input to the optical device to be configured, the average optical power, extinction ratio and margin of the generated optical signal are acceptable (step 402 has been debugged), and the cross-point is 40. The acceptable range of the intersection in the performance parameter is usually 45-55, so the intersection in the performance parameter is not acceptable, and the adjustment mode is to increase the intersection of the driving parameters until the intersection in the performance parameter reaches the acceptable range.
In some embodiments, in order to increase the representativeness of each data in the basic data set, the method for configuring parameters of an optical device further includes step 500 based on the above technical solution.
The step 500 specifically includes: after the parameter sets obtained in step 403 are written into the basic data, the euclidean distance calculation method of step 303 is adopted to calculate the sum value of the distances between the performance parameters in each parameter set and the performance parameters in other parameter sets, and the parameter set with the largest sum value is removed from the basic data set.
For example, in step 403, a parameter set M is obtained 0 The parameter sets are input into the basic data set, and then each parameter set M in the basic data set i The Euclidean distance calculation method in the step 303 is adopted to calculate the distance d between the performance parameter of the self and the performance parameters of other parameter sets 1 、d 2 、d 3 、……d x Then, the distance d of the performance parameters 1 、d 2 、d 3 、……d x Added to obtain d 1 +d 2 +d 3 、……+d x . The above d can be calculated for each parameter set 1 +d 2 +d 3 、……+d x 。
If parameter set M 0 Calculated d 1 +d 2 +d 3 、……+d x Is d obtained by calculation in all parameter sets 1 +d 2 +d 3 、……+d x Maximum, the parameter set M 0 And (5) removing the data from the basic data set.
The foregoing description is only of the preferred embodiments of the present disclosure and description of the principles of the technology being employed. It will be appreciated by those skilled in the art that the scope of the application in the embodiments of the present disclosure is not limited to the specific combination of the above technical features, but encompasses other technical features formed by any combination of the above technical features or their equivalents without departing from the spirit of the application. Such as the above-described features, are mutually substituted with (but not limited to) the features having similar functions disclosed in the embodiments of the present disclosure.
Claims (10)
1. The configuration method of the driving parameters of the optical device comprises the steps of carrying out parameter configuration on the optical device through a test system, wherein the test system comprises a test computer, a code error meter, a test circuit board and an eye oscilloscope; the test computer is in signal connection with the error code instrument, the test circuit board and the eye oscilloscope, the error code instrument is in signal connection with the test circuit board, and the test circuit board is in signal connection with the eye oscilloscope;
the method is characterized by comprising the following steps of:
step 100: inputting a plurality of parameter sets to a test computer to establish a base data set, wherein each parameter set comprises driving parameters for driving an optical device to generate an optical signal and corresponding performance parameters thereof;
step 200: the method comprises the steps that an optical device to be configured is mounted on a test circuit board, a test computer controls the test circuit board to write standard parameters into the optical device to be configured, whether the optical device is qualified or not is judged through performance parameters of optical signals generated by the optical device, and if the optical device is qualified, the configuration of the optical device is completed; if not, executing step 300; the standard parameters are a set of preset driving parameters for driving the optical device to be configured to work;
step 300: the testing computer searches n parameter sets which are nearest to the performance parameters of the optical device to be configured under the condition that standard parameters are configured, calculates the average value of the driving parameters in the n parameter sets to obtain average driving parameters, drives the optical device to be configured to generate optical signals, judges whether the optical signals generated by the optical device are qualified or not, writes the average driving parameters into the optical device if the optical signals are qualified, and takes down the optical device; if not, step 400 is performed, wherein n is a positive integer greater than 1;
step 400: the test computer adjusts the driving parameters of the optical devices to be configured one by one, and when the test computer adjusts a group of driving parameters to enable the performance parameters of the optical signals generated by the optical devices to be qualified, the driving parameters are written into the optical devices, and the optical devices are taken down; and simultaneously, inputting the group of driving parameters and the performance parameters into a basic data set of the test computer as parameter sets.
2. The method for configuring the optical device driving parameters according to claim 1, wherein: the driving parameters include sink current, modulation current and crossover point; performance parameters include average optical power, extinction ratio, margin, and crossover points.
3. The method for configuring the optical device driving parameters according to claim 1, wherein: step 100 comprises:
step 101: mounting the optical device to be configured on a test circuit board;
step 102: inputting a group of manually configured driving parameters to a test computer, wherein the test computer controls the test circuit board to work through the driving parameters so that the test circuit board drives the optical device to be tested to generate optical signals;
step 103: the test computer obtains performance parameters of optical signals generated by the optical device to be configured from the eye oscilloscope, and takes the driving parameters and the performance parameters as parameter sets;
step 104: repeating steps 101-103 for several times to obtain a plurality of parameter sets, and inputting the parameter sets with qualified performance parameters into a basic data set of a test computer.
4. The method for configuring the optical device driving parameters according to claim 2, wherein: step 300 includes:
step 301: the test computer reads the performance parameter A of the generated optical signal of the optical device to be configured under the environment of configuring standard parameters 0 ＝(A 01 ,A 02 ,A 03 ,A 04 ) Wherein A is 01 Is average light power A 02 Is of extinction ratio A 03 Is tolerance, A 04 Is the intersection;
step 302: the test computer reads the performance parameters A of all parameter sets in the basic data set ij I= {1,..m } j= {1,2,3,4}, where m represents the number of parameter sets in the underlying dataset;
step 303: the test computer calculates each performance parameter A by adopting Euclidean distance ij And performance parameter A 0 Distance d of (2) i0 The method comprises the steps of carrying out a first treatment on the surface of the Wherein,
step 304: from all the performance parameters A ij Is selected and performance parameter A 0 The nearest n performance parameters are read out and the driving parameters B corresponding to the n performance parameters are read out nk N= {1,..n }, k= {1,2,3}, and calculating an average of the n driving parameters to obtain an average driving parameterk＝{1,2,3}。
Step 305: control of average drive parameters for test computer controlled test circuit boardsStarting an optical device to be configured, judging whether an optical signal generated by the optical device is qualified, and if so, writing average parameters into the optical devicek= {1,2,3}, and removing the optical device; if not, step 400 is performed.
5. A method of configuring an optical device driving parameter as claimed in claim 3, wherein: step 400 includes:
step 401: regulating the sum value of the current and the modulation current to enable the average optical power of the optical signal of the optical device to be configured to reach the intermediate value in the range of the average optical power so as to obtain a fixed value c of the current and the modulation current;
step 402: under the condition that the sum value of the current and the modulation current is ensured to be a fixed value c, the current and the modulation current are adjusted one by adopting a one-dimensional search method, so that a weighting function Y=alpha ER+beta margin reaches the maximum value in a qualified range, wherein alpha+beta=1, ER is an extinction ratio, and margin is a tolerance;
step 403, adjusting the intersection of the driving parameters to make the intersection of the optical signals generated by the optical device to be tested meet the requirements, and writing the obtained current, the modulation current and the intersection into the optical device to be configured; the average optical power, margin, extinction ratio, and cross-point of the obtained sink current, modulation current, cross-point, and optical signal generated by the optical device to be configured are then entered as parameter sets into a base data set.
6. The method for configuring the optical device driving parameters according to claim 5, wherein: the sink current, modulation current, margin, and extinction ratio in step 402 satisfy the following relationship:
I sink is a sink current, I mod Is the modulation current, ER is the extinction ratio, margin is the margin;
7. the method for configuring the optical device driving parameters according to claim 6, wherein: step 402 specifically includes:
step 4021: setting initial values of stepping current and filling current, and setting values of alpha and beta;
step 4022: reducing the current from the initial value a times, and calculating the function value of the weighting function according to the optical signal generated by the optical device;
step 4023: reducing the current from the initial value a times, and calculating the function value of the weighting function according to the optical signal generated by the optical device;
step 4024: taking the current corresponding to the maximum value of the function values of all the weighting functions recorded in the steps 4022 and 4023 as an initial value;
step 4025: judging whether the function value of the optical signal generated after the optical device to be configured is driven is the largest function value of the optical signal generated by adding one step current to the current and the function value of the optical signal generated by subtracting one step current from the current when the current is taken as a driving parameter; if yes, executing step 4026, and if not, re-executing 4022-4025;
step 4026: and taking the initial value of the current in step 4025 and the modulation current calculated by the value of the current in the constant sum as the value for completing parameter configuration.
8. The method for configuring the optical device driving parameters according to claim 7, wherein: step 4022 further includes stopping performing step 4022 after the function value of the weighting function y=αer+βmargin decreases b times in succession.
9. The method for configuring the optical device driving parameters according to claim 8, wherein: step 4023 further includes stopping performing step 4022 after the function value of the weighting function y=αer+βmargin has been successively reduced b times, b < a.
10. The method for configuring the driving parameters of the optical device according to any one of claims 1 to 9, wherein: further comprising the step 500: after the parameter sets obtained in step 403 are written into the basic data, the euclidean distance calculation method of step 303 is adopted to calculate the sum value of the distances between the performance parameters in each parameter set and the performance parameters in other parameter sets, and the parameter set with the largest sum value is removed from the basic data set.
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| CN101483481A (en) * | 2009-02-05 | 2009-07-15 | 成都优博创技术有限公司 | Debugging method for average light power and extinction ratio parameter of light transmitter |
| CN112189287A (en) * | 2018-05-21 | 2021-01-05 | 谷歌有限责任公司 | Burst mode laser driving circuit |
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