Calibration method, wavelength control method and system for dimmable module PCBA

Abstract

The present application discloses a calibration method for a PCBA of an adjustable light module, comprising: loading a HEX file into the PCBA of the adjustable light module; decrypting the PCBA, turning on the wavelength adjustment function, and writing the TEC temp value; sequentially calibrating several indicators that affect the wavelength of the adjustable light module, eliminating abnormal PCBAs based on a threshold judgment method, and obtaining a set of set measurement data points corresponding to each indicator; performing a straight line fitting on the set of set measurement data points corresponding to each indicator, and obtaining the slope and intercept that characterize the calibration coefficient of the corresponding indicator. The present application can eliminate abnormal PCBAs based on a threshold judgment method, and only retain the set measurement data point sets corresponding to the indicators of normal PCBAs to obtain the calibration coefficients, thereby reducing the chances of errors and rework, reducing the product scrap rate due to improper calibration, and reducing the overall manufacturing cost. Moreover, the present application can calibrate more than two indicators at a time, and can adapt to the calibration tasks of multi-wavelength adjustable light modules, with wider applicability.

Description

Technical Field

[0001] This application relates to the field of optical communication technology, and more specifically, to a calibration method, wavelength control method and system for a tunable optical module PCBA. Background Technology

[0002] With the continuous maturation of DWDM (Dense Wavelength Division Multiplexing) technology in optical communication, the number of wavelengths transmitted in optical communication systems has reached tens or even hundreds. Tunable optical modules designed based on tunable lasers can achieve model standardization, can be arbitrarily connected to multiplexers and demultiplexers without requiring one-to-one pairing, and do not suffer from wavelength identification issues. Such optical modules have higher requirements in manufacturing processes compared to traditional optical modules. According to the OIF-ITLA-MSA protocol, in a DWDM system with a channel spacing of 50GHz, the error between the output wavelength of the optical module and the theoretical wavelength of the channel should be less than 0.02nm. Therefore, achieving precise wavelength control requires attention to every material and every process within the module. The PCBA, as the hardware carrier for wavelength adjustment, is the first and most important step in achieving precise wavelength control.

[0003] Most current optical module PCBAs do not require calibration, or only require calibration of two indicators. When laying out the PCB, the indicator signals to be calibrated are connected to the gold fingers, and the calibration can be completed directly through the gold fingers during PCBA calibration. However, for a tunable optical module with 96 wavelengths, as many as 10 parameters need to be calibrated, plus two IIC (i.e., I2C, a bus structure. Inter-Integrated Circuit, actually short for IICBus, so the Chinese should be called integrated circuit bus, it is a serial communication bus that uses a multi-master-slave architecture, developed by Philips in the 1980s for connecting low-speed peripheral devices in motherboards, embedded systems, or mobile phones.), VCC (short for Voltage Current Condenser, meaning the circuit's supply voltage. In electronic circuits, VCC is the circuit's supply voltage, and VDD is the chip's operating voltage), GND (short for Ground, or the short for the grounding terminal of a wire, usually representing the ground wire in a circuit, it is an important reference point in the circuit. For circuits with a single power supply, GND is usually the negative terminal.) and TX_dis, etc., making traditional calibration methods and systems unsuitable for calibrating this tunable optical module PCBA. Summary of the Invention

[0004] In response to at least one defect or improvement requirement of the prior art, this application provides a calibration method, wavelength control method and system for tunable optical module PCBA, which is used to at least solve the technical problem that the existing calibration methods and systems are no longer suitable for the calibration tasks of multi-wavelength tunable optical modules.

[0005] To achieve the above objectives, in a first aspect, this application provides a calibration method for a dimmable module PCBA, comprising:

[0006] Load the HEX file into the dimmable module PCBA;

[0007] Decrypt the tunable light module PCBA, enable the wavelength adjustment function, and write the TEC temp value;

[0008] Several indicators affecting the wavelength of the tunable light module were sequentially calibrated. Abnormal tunable light module PCBAs were eliminated based on threshold judgment. A set of measurement data points corresponding to each indicator was obtained, specifically including:

[0009] The m-th index is derived from X m 1. Start testing, with b m The step unit gradually decreases or increases to X. m n ;

[0010] If |X m p -X m pp |≤a m This indicates that the PCBA is normal and will proceed to the next setpoint X. m p+1 Continue testing; if |X m p -X m pp |>a m If so, it indicates that the PCBA is abnormal and does not meet the requirements of the dimmable module, and the PCBA should be removed.

[0011] Iterate through each set value of the m-th indicator until it reaches the endpoint set value X. m n The m-th index X is obtained. m The corresponding set of measurement data points (X) m 1, X m 11 ), (X m 2, X m 22 )…(X m n X m nn );

[0012] Based on the above logic, all indicators are traversed sequentially until the calibration of all indicators is completed, and the set of set measurement data points corresponding to each indicator is obtained respectively.

[0013] Among them, X m X represents the m-th index affecting the wavelength of the tunable optical module, where m is the index number to be calibrated, q is the number of indexes to be calibrated, 1 ≤ m ≤ q, q ≥ 3 and is an integer; m p X represents the set value of the p-th current and / or voltage of the m-th index. m pp This represents the measured value of the p-th current and / or voltage of the m-th index, where 1 ≤ p ≤ n, and n represents the number of set values; a m b represents the calibration threshold of the m-th index; m This represents the step unit for the m-th index;

[0014] For each indicator, a straight line is fitted to the set of measurement data points corresponding to the indicator, and the slope and intercept representing the calibration coefficient of the corresponding indicator are obtained.

[0015] Furthermore, the 2-wire interface field in the SFF-8472 protocol is enabled, a custom dedicated register table is defined in the vendor-defined area of ​​the high byte of area A2, and the slope and intercept of each calibration coefficient representing the corresponding index are written into the table.

[0016] Furthermore, the corresponding calibration coefficients for each indicator are stored in the database.

[0017] Secondly, this application provides a wavelength control method, which corrects the current and / or voltage parameters related to the output wavelength of the tunable light module PCBA and the tunable light module based on the calibration coefficients of the indicators obtained by the calibration method described above.

[0018] Thirdly, this application provides a calibration system for a dimmable module PCBA, comprising:

[0019] The test board provides interfaces for calibration, communication, measurement, and power supply for the tunable module PCBA to be calibrated.

[0020] The calibration fixture is used to hold and position the dimmable PCBA to be calibrated, and to assist in the calibration process.

[0021] Test source meter, used to measure current and / or voltage values ​​of various parameters affecting the wavelength of the tunable optical module during calibration;

[0022] A DC power supply is used to provide power to the tunable dimming module PCBA to be calibrated and the test board.

[0023] The processor is configured to set current and / or voltage settings for various parameters affecting the wavelength of the tunable optical module during calibration, and to execute the steps of the calibration method described above.

[0024] Furthermore, the test board includes: a power supply circuit, a communication circuit, a control circuit, a switch switching circuit, a module electrical interface, a measurement interface, a power interface, and a data transmission interface;

[0025] The switching circuit is connected to the tunable light module PCBA to be calibrated through the module electrical interface, and controls the calibration order of all indicators that affect the wavelength of the tunable light module through the switching circuit.

[0026] The switching circuit is connected to the test source meter through the measurement interface;

[0027] The switching circuit is connected to the DC power supply in sequence through the power circuit and the power interface; the power circuit is used to acquire electrical energy and provide it to the test board.

[0028] The switching circuit is connected to the processor in sequence through the control circuit, the communication circuit, and the data transmission interface; the communication circuit is used for data transmission; and the control circuit is used to control the operation of the calibration method.

[0029] Fourthly, this application provides a wavelength control system, comprising:

[0030] The calibration component is capable of implementing any of the calibration methods described above to obtain the slope and intercept of the calibration coefficients characterizing the indicators affecting the wavelength of the tunable optical module.

[0031] The calibration component, based on the calibration coefficients of the acquired indicators, corrects the current and / or voltage parameters of the tunable module PCBA and the output wavelength of the tunable module.

[0032] In summary, compared with the prior art, the above-described technical solutions conceived in this application can achieve the following beneficial effects:

[0033] (1) The calibration method of this application, based on threshold judgment, can eliminate abnormal PCBAs and retain only the set of set measurement data points corresponding to the indicators of normal PCBAs to obtain calibration coefficients. This reduces the probability of errors and rework, lowers the product scrap rate caused by improper calibration, and reduces the overall manufacturing cost. Furthermore, it can calibrate more than two indicators at once, making it suitable for calibration tasks of multi-wavelength tunable optical modules and thus having wider applicability. This application can significantly reduce the time and workload of manual intervention, and the automated process makes the calibration process faster, thereby improving production efficiency and equipment utilization. At the same time, it reduces errors caused by human factors, ensuring the performance consistency and reliability of products or systems.

[0034] (2) The calibration method of this application adds storage for writing calibration coefficients on the basis of the existing SFF-8472 protocol, which can calibrate and store more indicators, adapt to the calibration task of multi-wavelength tunable modules, and has a wider range of applicability.

[0035] (3) All steps and data of the calibration method of this application can be recorded and stored in the database, which facilitates later review and quality traceability.

[0036] (4) The wavelength control method of this application is based on the calibration coefficient of the index obtained by the aforementioned calibration method to correct the current and / or voltage parameters related to the output wavelength of the tunable module PCBA and the tunable module, thereby realizing precise control of the output wavelength of the tunable module. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 The core flowchart of a calibration method for a dimmable module PCBA provided in this application embodiment;

[0039] Figure 2 A detailed flowchart of a calibration method for a dimmable module PCBA provided in this application embodiment;

[0040] Figure 3 The calibration coefficient fitting plot provided for the embodiments of this application;

[0041] Figure 4 A schematic diagram of a calibration system for a dimmable module PCBA provided in this application embodiment;

[0042] Figure 5 This is a schematic diagram of the structure of the test board provided in the embodiments of this application;

[0043] Figure 6 This is a schematic diagram of the structure of the dimmable module PCBA provided in the embodiments of this application;

[0044] Figure 7 This is one of the three-dimensional structural schematic diagrams of the calibration fixture provided in the embodiments of this application;

[0045] Figure 8 This is the second three-dimensional structural schematic diagram of the calibration fixture provided in the embodiments of this application;

[0046] Figure label:

[0047] exist Figure 6 middle:

[0048] 301. First contact surface on the front of the PCBA motherboard (i.e., the emitter pad on the front of the PCBA motherboard);

[0049] 302. Second contact surface on the front of the PCBA motherboard (i.e., gold fingers on the front of the PCBA motherboard);

[0050] 303. First contact surface on the back of the PCBA motherboard (i.e., the emitter pad on the back of the PCBA motherboard);

[0051] 304. Second contact surface on the back of the PCBA motherboard (i.e., gold fingers on the back of the PCBA motherboard);

[0052] exist Figure 7 middle:

[0053] 401. Calibration fixture handle (or calibration device handle);

[0054] 402. Calibration probe;

[0055] 403. The first clamping part of the calibration fixture (i.e., the first clamping limit groove, used to place the front transmitter pad 301 of the PCBA motherboard);

[0056] 404. Calibration fixture second clamping part (i.e., second clamping fixture limiting groove, used to place the emitter pad 302 on the back of the PCBA motherboard);

[0057] 405. Enlarged view of the contact diagram of the nine pins of the first contact surface 301 and the second contact surface 302 on the front of the PCBA motherboard (enlarged view of the parts 301 and 302 to be calibrated after the PCBA placement fixture is completed);

[0058] 406. Enlarged view of the contact diagram of the nine pins of the first contact surface 303 and the second contact surface 304 on the back of the PCBA motherboard (enlarged view of the parts 303 and 304 to be calibrated after the PCBA placement fixture is completed);

[0059] exist Figure 8 middle:

[0060] 407. Measurement interface opening (i.e., the connection port between the calibration test board power interface and the DC power supply). Detailed Implementation

[0061] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. Furthermore, the technical features involved in the various embodiments described below can be combined with each other as long as they do not conflict with each other.

[0062] The terms "first," "second," or "mth," etc., used in the specification, claims, or accompanying drawings of this application are used to distinguish different objects and not to describe a particular order. Furthermore, the terms "comprising" or "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such processes, methods, products, or apparatus.

[0063] As mentioned in the background section of the manual, most current optical module PCBAs do not require calibration, or only require calibration of two parameters. This can be achieved simply by connecting the signals of the parameters to be calibrated to the gold fingers during PCB layout, and then directly calibrating the PCBA through the gold fingers. However, for tunable optical modules with 96 wavelengths, as many as 10 parameters need to be calibrated, plus two IIC, VCC, GND, and TX_dis, making traditional calibration methods and systems unsuitable for calibrating such tunable optical module PCBAs. In view of this technological situation, refer to... Figures 1-3 One embodiment of this application proposes a calibration method for a dimmable light module PCBA, which mainly includes the following steps.

[0064] Step 1: Load the HEX file into the dimmable module PCBA (hereinafter referred to as PCBA).

[0065] Specifically, the HEX file is loaded into the PCBA through the IIC interface on the gold finger end. The HEX file contains the relevant contents of EEPROM and A0 / A2, thereby ensuring the underlying operating logic of the MCU.

[0066] Step 2: Decrypt the PCBA and enable the wavelength adjustment function, then write the TEC temp value.

[0067] Specifically, the PCBA is decrypted through the IIC interface on the gold finger end, and the manual wavelength adjustment function is enabled to write the TECtemp value, thereby ensuring the normal operation of the PCBA.

[0068] Step 3: Sequentially calibrate several indicators affecting the wavelength of the tunable light module, and eliminate abnormal tunable light module PCBAs based on threshold judgment method. Obtain the set of measurement data points corresponding to each indicator, specifically including:

[0069] The m-th index is derived from X m 1. Start testing, with b m The step unit gradually decreases or increases to X. m n .

[0070] If |X m p -X m pp |≤a m This indicates that the PCBA is normal and will proceed to the next setpoint X. m p+1 Continue testing; if |X m p -X m pp |>a m If the PCBA is faulty and does not meet the requirements of the dimmable module, then the PCBA should be removed.

[0071] Iterate through each set value of the m-th indicator until it reaches the endpoint set value X. m n The m-th index X is obtained. m The corresponding set of measurement data points (X) m 1, X m 11 ), (X m 2, X m 22 )…(X m n X m nn ).

[0072] Based on the above logic, all indicators are traversed sequentially until the calibration of all indicators is completed, and the set of set measurement data points corresponding to each indicator is obtained.

[0073] Among them, X m X represents the m-th index affecting the wavelength of the tunable optical module, where m is the index number to be calibrated, q is the number of indexes to be calibrated, 1 ≤ m ≤ q, q ≥ 3 and is an integer; m p X represents the set value of the p-th current and / or voltage of the m-th index. m pp This represents the measured value of the p-th current and / or voltage of the m-th index, where 1 ≤ p ≤ n, and n represents the number of set values; a mb represents the calibration threshold of the m-th index; m This represents the step unit for the m-th index.

[0074] Specifically, refer to Figure 2 The indicators BM / FM / DBR / MZ / MZ_P / MZ_N are sequentially calibrated to eliminate abnormal PCBAs.

[0075] More specifically, taking the first indicator X1 as an example: starting the test from B1 (which is the starting point value X11 corresponding to the first indicator X1), the step value is gradually decreased or increased to B1 (which is the step unit corresponding to the first indicator X1). n (that is, the endpoint setting value X1 corresponding to the first indicator X1) n First, the initial setting value B1 is written into the software, and then B is read from the high-precision test source table. 11 (That is, the measured current and / or voltage value X1 corresponding to the starting point setting value X11 of the first index X1) 11 If the difference △B1=|B1-B 11 If |≤a1 (which is the calibration threshold corresponding to the first indicator X1), it means the PCBA is normal. Proceed to the second test value B2 and continue testing the next test value until each test value shows that the PCBA is normal. Then output the set of set measurement data points (B1, B2, ..., B1) corresponding to the first indicator X1. 11 (B2, B) 22 )…(B n B nn If the difference △B1=|B1-B 11 If |>a1, it indicates that the PCBA is abnormal and does not meet the requirements of the dimmable module. It is judged as NG and the PCBA is removed.

[0076] Similarly, other indicators such as FM, DBR, MZ, MZ_P, and MZ_N are calibrated sequentially.

[0077] Step 4: Perform linear fitting on the set of measurement data points corresponding to each indicator, and obtain the slope and intercept representing the calibration coefficient of the corresponding indicator. (Refer to...) Figure 3 .

[0078] More specifically, taking the first indicator X1 as an example: The set of measurement data points (B1, B...) corresponding to the first indicator X1 set and read in step 3... 11 (B2, B) 22 )…(B n B nn Fit the line to a straight line, calculate the slope and offset, and these are the calibration coefficients of the first index X1.

[0079] Similarly, linear fitting is performed on the set of measurement data points corresponding to other indicators such as FM, DBR, MZ, MZ_P, and MZ_N to obtain the calibration coefficients for each indicator.

[0080] The calibration method in this application, based on threshold judgment, can eliminate abnormal PCBAs, retaining only the set of measured data points corresponding to the indicators of normal PCBAs to obtain calibration coefficients. This reduces the probability of errors and rework, lowers the product scrap rate due to improper calibration, and reduces overall manufacturing costs. Furthermore, it can calibrate more than two indicators at once, adapting to the calibration tasks of multi-wavelength tunable optical modules, thus having wider applicability. This application significantly reduces the time and workload of manual intervention; the automated process makes the calibration process faster, thereby improving production efficiency and equipment utilization. Simultaneously, it reduces errors caused by human factors, ensuring the performance consistency and reliability of products or systems.

[0081] In one embodiment, preferably, the calibration method of this application enables the 2-wire Interface Fields in the SFF-8472 protocol, and defines a custom dedicated register table in the Vendor Specialized area of ​​the high byte of area A2. The calibration coefficients of relevant indicators (the calibration coefficients of each indicator calculated in step 4, i.e., slope and intercept) are written into this table, thus finally completing the calibration of the PCBA. The calibration method of this application adds storage for writing calibration coefficients to the existing SFF-8472 protocol, allowing for the calibration and storage of more indicators, adapting to the calibration tasks of multi-wavelength tunable optical modules, and thus having wider applicability.

[0082] In one embodiment, preferably, after calibration is completed, the calibration coefficients of all indicators are stored in the company's database. All steps and data of the calibration method of this application can be recorded and stored in the database, thereby facilitating later query, audit, and quality traceability.

[0083] One embodiment of this application provides a calibration system for a dimmable module PCBA. This calibration system mainly includes the following components: a test board for calibration, a matching calibration fixture, a high-precision test source meter, a DC power supply, and a computer. (Reference) Figure 4 .

[0084] The calibration system calibrates a dimmable module PCBA, and the PCBA reference is... Figure 6PCBA is short for Printed Circuit Board Assembly. It refers to the entire manufacturing process of a bare PCB board after SMT (Surface Mount Technology) component mounting or DIP (Dual In-line Package) insertion. This is a common way of writing it in China, while the standard way in Europe and America is PCB'A with an apostrophe, which is considered the official usage. PCBA refers to a product where electronic components (such as resistors, capacitors, inductors, and ICs) are fixed on a PCB (Printed Circuit Board) by soldering or plugging. The PCB is the foundation of PCBA; it is an insulating substrate used for electrical connections between electronic components. Pre-designed circuit patterns and holes make the connection between components simple and convenient.

[0085] PCBA is the circuit board for a tunable optical module. It is a two-layer board with both hard and soft connections. One end of the mainboard, which needs calibration, has gold fingers (connecting fingers, the gold conductive contacts in a computer, through which all signals are transmitted. Gold fingers are composed of numerous gold conductive contacts, named for their gold plating and finger-like arrangement). The other end has the double-sided pads for the transmitter of the tunable optical module, which connect to the tunable laser. The gold fingers on the front of the PCBA have the IIC interface and GND for communication calibration, while the gold fingers on the back have VCC and GND for powering the PCBA. The transmitter pads on the front of the PCBA have several parameters affecting the wavelength of the tunable optical module that need calibration: the pre-sampling grating current value FM- / FM+, the negative voltage value of the MZ modulator MZ_P / MZ_N, and the phase current value laser_phase, etc. On the back of the PCBA, there are several indicators that affect the wavelength of the tunable optical module that need to be calibrated on the transmitter pads: post-sampling grating current value BM- / BM+, gain current value GAIN, optimal operating point current MZ_bias, etc.

[0086] The test board used for calibration is a crucial component of the calibration system, providing interfaces for power supply, communication, data conversion (for measurement), and calibration of the PCBA. It mainly includes: power supply circuits, communication circuits, control circuits, and switching circuits, etc. (Refer to...) Figure 5The power supply circuit powers the entire calibration test board. The PCBA to be calibrated is connected to the test board via a module electrical interface for calibration. All parameters to be calibrated are connected to the module electrical interface, such as FM, BM, PH, MZ, GAIN, SOA, BIAS_P, and BIAS_N. The calibration order of these parameters is controlled by a switching circuit. The switching circuit is connected to a measurement interface, which in turn connects to a high-precision test source meter to read the current or voltage feedback values ​​of the parameters. One end of the control circuit is connected to the switching circuit, and the other end is connected to the communication circuit. It connects to a computer via a USB interface, and the computer program controls the entire calibration procedure and method.

[0087] Calibration fixture: Used to position PCBA, assist in calibration, and serve as a reference. Figure 7 and Figure 8 .

[0088] High-precision test source meter: used to read the current or voltage values ​​of various parameters when calibrating PCBA.

[0089] DC power supply: Used to provide operating voltage to PCBA and / or test boards.

[0090] Computer: Used to execute the calibration method described in any of the preceding items and to control the entire calibration system, with the processor contained therein representing the computer.

[0091] Install the test board used for calibration on, as shown in... Figure 7 or Figure 8 Inside the calibration fixture, the calibration test board's power interface is connected to a DC power supply. Voltage and / or current measurement interfaces are led out from measurement interface opening 407 on the back of the fixture and connected to a high-precision measurement source meter. A computer is connected to the test board via a serial cable and simultaneously to the high-precision measurement source meter via GPIB to acquire voltage and current data. Figure 4 PCBA to be calibrated (reference) Figure 6 Place the calibration probe into the groove of the calibration fixture, ensuring that the first contact surface 301 of the PCBA motherboard faces upwards and is positioned at the first clamping part 403 of the calibration fixture, while the second contact surface 302 of the PCBA motherboard faces upwards and is positioned at the second clamping part 404 of the calibration fixture. After placement, the calibration probe on the calibration fixture will be in perfect contact with the indicator pins of the PCBA that need to be calibrated. Figure 7 405 is an enlarged view of the contact diagram of the 9 pins on the front of the PCBA motherboard; 406 is an enlarged view of the contact diagram of the 9 pins on the first contact surface 303 and the second contact surface 304 on the back of the PCBA motherboard; 402 is the calibration probe. At this point, the calibration system is complete. When starting calibration, rotate... Figure 7 The calibration fixture handle 401 in the middle can connect the entire calibration circuit, and the calibration method can be run to complete the PCBA calibration.

[0092] The calibration system of this application can significantly reduce the time and workload of manual intervention. The automated process makes the calibration process faster, thereby improving production efficiency and equipment utilization. At the same time, by reducing the chance of errors and rework, it also reduces the product scrap rate caused by improper calibration, thus reducing the overall manufacturing cost. It can reduce errors caused by human factors and ensure the performance consistency and reliability of products or systems. All steps and data can be recorded and stored, which facilitates later review and quality traceability.

[0093] One embodiment of this application provides a wavelength control method, which corrects the current and / or voltage parameters related to the output wavelength of the tunable module PCBA and the tunable module based on the calibration coefficients of the indicators obtained by the calibration method described above, thereby enabling precise control of the output wavelength of the tunable module.

[0094] One embodiment of this application provides a wavelength control system, which includes:

[0095] The calibration component is capable of implementing the calibration method described in any of the preceding claims to obtain the slope and intercept of the calibration coefficients characterizing the indicators affecting the wavelength of the tunable optical module.

[0096] The calibration component, based on the calibration coefficients of the acquired indicators, corrects the current and / or voltage parameters of the tunable module PCBA and the output wavelength of the tunable module.

[0097] For specific technical details of the calibration method, please refer to the discussion in the previous section on calibration method implementation examples, which will not be repeated here.

[0098] It should be noted that the functional modules in the various embodiments of this application can be integrated into one processing module, or each module can exist physically separately, or two or more modules can be integrated into one module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product.

[0099] The flowcharts and / or block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in the flowcharts and / or block diagrams may represent a module, segment, or portion of code containing one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. Furthermore, it should be noted that each block in the block diagram or flowchart, and combinations of blocks in the block diagram or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0100] Those skilled in the art will understand that the features described in the various embodiments and / or claims of this application can be combined and / or combined in various ways, even if such combinations or combinations are not explicitly described in this application. In particular, without departing from the spirit and teachings of this application, the technical features described in the various embodiments and / or claims of this application can be combined and / or combined in various ways, and all such combinations and / or combinations fall within the scope of this application.

[0101] Although this application has been shown and described with reference to specific exemplary embodiments thereof, those skilled in the art will understand that various changes in form and detail may be made to this application without departing from the spirit and scope of the application as defined by the appended claims and their equivalents. Therefore, the scope of this application should not be limited to the above embodiments, but should be determined not only by the appended claims, but also by their equivalents.

Claims

1. A calibration method for a dimmable module PCBA, characterized in that, include: Load the HEX file into the dimmable module PCBA; Decrypt the tunable light module PCBA, enable the wavelength adjustment function, and write the TEC temp value; Several indicators affecting the wavelength of the tunable light module were sequentially calibrated. Abnormal tunable light module PCBAs were eliminated based on threshold judgment. A set of measurement data points corresponding to each indicator was obtained, specifically including: The m-th index is derived from X m1 Start the test, with b m The step unit gradually decreases or increases to X. mn ; If |X mp -X mpp |≤a m This indicates that the PCBA is normal and will proceed to the next setpoint X. mp+1 Continue testing; if |X mp -X mpp |>a m If so, it indicates that the PCBA is abnormal and does not meet the requirements of the dimmable module, and the PCBA should be removed. Iterate through each set value of the m-th indicator until it reaches the endpoint set value X. mn The m-th index X is obtained. m The corresponding set of measurement data points (X) m1 X m11 ), (X m2 X m22 )…(X mn X mnn ); Based on the above logic, all indicators are traversed sequentially until the calibration of all indicators is completed, and the set of set measurement data points corresponding to each indicator is obtained respectively. Among them, X m X represents the m-th index affecting the wavelength of the tunable optical module, where m is the index number to be calibrated, 1 ≤ m ≤ q, and q represents the number of indexes to be calibrated, where q ≥ 3 and is an integer; mp X represents the set value of the p-th current and / or voltage of the m-th index. mpp This represents the measured value of the p-th current and / or voltage of the m-th index, where 1 ≤ p ≤ n, and n represents the number of set values; a m b represents the calibration threshold of the m-th index; m This represents the step unit for the m-th index; For each indicator, a straight line is fitted to the set of measurement data points corresponding to the indicator, and the slope and intercept representing the calibration coefficient of the corresponding indicator are obtained.

2. The calibration method as described in claim 1, characterized in that, Enable the 2-wire interface field in the SFF-8472 protocol, define a custom dedicated register table in the vendor-defined area of ​​the high byte of area A2, and write the slope and intercept of each calibration coefficient representing the corresponding index into the table.

3. The calibration method as described in claim 1 or 2, characterized in that, Store the corresponding calibration coefficients for each indicator in the database.

4. A wavelength control method, characterized in that, The wavelength control method is based on the calibration coefficients of the index obtained by the calibration method described in any one of claims 1-3, and corrects the current and / or voltage parameters related to the output wavelength of the tunable module PCBA and the tunable module.

5. A calibration system for a dimmable module PCBA, characterized in that, include: The test board provides interfaces for calibration, communication, measurement, and power supply for the tunable module PCBA to be calibrated. The calibration fixture is used to hold and position the dimmable PCBA to be calibrated, and to assist in the calibration process. Test source meter, used to measure current and / or voltage values ​​of various parameters affecting the wavelength of the tunable optical module during calibration; A DC power supply is used to provide power to the tunable dimming module PCBA to be calibrated and the test board. A processor is configured to set current and / or voltage values ​​for various parameters affecting the wavelength of the tunable optical module during calibration, and to perform the steps of the calibration method according to any one of claims 1-3.

6. The calibration system as described in claim 5, characterized in that, The test board includes: a power supply circuit, a communication circuit, a control circuit, a switch circuit, a module electrical interface, a measurement interface, a power interface, and a data transmission interface; The switching circuit is connected to the tunable light module PCBA to be calibrated through the module electrical interface, and controls the calibration order of all indicators that affect the wavelength of the tunable light module through the switching circuit. The switching circuit is connected to the test source meter through the measurement interface; The switching circuit is connected to the DC power supply in sequence through the power circuit and the power interface; the power circuit is used to acquire electrical energy and provide it to the test board. The switching circuit is connected to the processor in sequence through the control circuit, the communication circuit, and the data transmission interface; the communication circuit is used for data transmission; and the control circuit is used to control the operation of the calibration method.

7. A wavelength control system, characterized in that, include: The calibration component is capable of implementing the calibration method according to any one of claims 1-3, and obtaining the slope and intercept of the calibration coefficients characterizing the indicators affecting the wavelength of the tunable optical module; The calibration component, based on the calibration coefficients of the acquired indicators, corrects the current and / or voltage parameters of the tunable module PCBA and the output wavelength of the tunable module.

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