Debugging method, device and equipment for optical power of DFB (Distributed Feedback) laser

Abstract

The invention discloses a method, a device and equipment for debugging optical power of a DFB (Distributed Feedback) laser, relates to the technical field of optical communication networks, and is used for solving the problem that an existing optical power debugging method is relatively low in efficiency and precision. The method comprises the following steps: obtaining optical power Po1 and optical power Po2 according to a preset debugging formula, backlight current Impd1 and backlight current Impd2; wherein the preset debugging formula is used for representing the relationship between the optical power and the backlight current; if the optical power Po2 is greater than the target optical power Pt, determining a linear ratio E1 and an intercept F1 of the optical power to the backlight current according to the point 1 and the point 2; determining backlight current Impdt1 according to the target optical power Pt, the linear proportion E1 and the intercept F1; obtaining optical power Pt1 according to a preset debugging formula and the backlight current Impdt1; and if the optical power Pt1 is determined to be within the error range of the target optical power Pt, DFB laser debugging is ended, so that the optical power debugging efficiency and precision can be greatly improved by reducing the debugging times.

Description

Technical Field

[0001] The present application relates to the technical field of optical communication networks, and provides a method, a device and equipment for debugging the optical power of a DFB laser. Background Art

[0002] As we all know, Distributed Feed Back (DFB) lasers have the characteristics of high speed, monochromaticity, narrow linewidth and high power output. Therefore, DFB lasers are widely used in optical communications and passive optical networks (PON), such as optical modules, optical modems, optical boards and FTTR access networks. The stability of optical power is one of the key indicators of DFB laser performance. Therefore, in practical applications, it is necessary to adjust the optical power to ensure that the output power of the DFB laser remains stable for a long time to avoid the impact of power fluctuations on the system.

[0003] At present, the step method, binary method, etc. are often used to adjust the backlight current Impd to change the bias current Ibias to achieve the target average optical power. However, since the efficiency of each DFB laser is different, and the inclination of the light intensity-current-voltage (Light Intensity-Current-Voltage, ‌LIV) curve of the DFB laser is inconsistent, when the step method or binary method is used for optical power debugging, multiple debugging is required to achieve the target average optical power. Therefore, it takes a lot of time to switch and test the optical power meter, which seriously affects the debugging efficiency and accuracy; in addition, since the existing debugging method is to perform iterative calculations using the linear ratio between the average optical power of the laser and the backlight current Impd, and the laser's optical power-bias current PI curve and the backlight current-bias current MI curve are not curves passing through the origin, so performing such a linear superposition calculation will also perform multiple calculations, which further seriously affects the debugging efficiency and accuracy.

[0004] Therefore, how to improve the efficiency and accuracy of optical power debugging has become a problem that needs to be solved urgently. Summary of the invention

[0005] The present application provides a method, device and equipment for debugging the optical power of a DFB laser, which are used to solve the problem that the efficiency and accuracy of the existing optical power debugging methods are low.

[0006] On the one hand, a method for debugging optical power of a DFB laser is provided, the method comprising: Get the target optical power Pt of the optical module; According to the preset debugging formula, the backlight current Impd1 and the backlight current Impd2, the optical power Po1 and the optical power Po2 are obtained; wherein the preset debugging formula is used to express the relationship between the optical power and the backlight current; the backlight current Impd2=backlight current Impd1+500uA; Determine whether the optical power Po2 is greater than the target optical power Pt; If the optical power Po2 is greater than the target optical power Pt, the linear ratio E1 and the intercept F1 of the optical power and the backlight current are determined according to point 1 and point 2; wherein the coordinates of point 1 are (Po1, backlight current Impd1), and the coordinates of point 2 are (Po2, backlight current Impd2); According to the target light power Pt, the linear ratio E1 and the intercept F1, the backlight current Impdt1 is determined; According to the preset debugging formula and the backlight current Impdt1, the optical power Pt1 is obtained; Determine whether the optical power Pt1 is within the error range of the target optical power Pt; If it is determined that the optical power Pt1 is within the error range of the target optical power Pt, the DFB laser debugging is terminated.

[0007] Optionally, after determining whether the first optical power Pt1 is within an error range of the target optical power Pt, the method further includes: If it is determined that the optical power Pt1 is not within the error range of the target optical power Pt, then determining whether the optical power Pt1 is greater than the target optical power Pt; If it is determined that the optical power Pt1 is greater than the target optical power Pt, the linear ratio E2 and the intercept F2 of the optical power and the backlight current are determined according to point 1 and point 3; wherein the coordinates of point 3 are (Pt1, backlight current Impdt1); According to the target optical power Pt, the linear ratio E2 and the intercept F2, proceed to the next optical power adjustment.

[0008] Optionally, after determining whether the optical power Pt1 is greater than the target optical power Pt, the method further includes: If it is determined that the optical power Pt1 is not greater than the target optical power Pt, then the linear ratio E3 and the intercept F3 of the optical power and the backlight current are determined according to point 2 and point 3; According to the target optical power Pt, the linear ratio E3 and the intercept F3, proceed to the next optical power adjustment.

[0009] Optionally, before obtaining the optical power Po1 and the optical power Po2 according to a preset debugging formula, the backlight current Impd1 and the backlight current Impd2, the method further includes: The preset debugging formula is determined according to the PI curve and the MI curve of the DFB laser; wherein the PI curve is used to represent the relationship between the optical power and the bias current Ibias, and the MI curve is used to represent the relationship between the backlight current Impd and the bias current Ibias.

[0010] Optionally, after determining whether the optical power Po2 is greater than the target optical power Pt, the method further includes: If it is determined that the optical power Po2 is not greater than the target optical power Pt, the optical power Po3 is obtained according to the preset debugging formula and the backlight current Impd3; wherein, the backlight current Impd3=backlight current Impd2+200uA; Determine whether the optical power Po3 is greater than the target optical power Pt; If it is determined that the optical power Po3 is not greater than the target optical power Pt, then it is determined whether the bias current Ibias is greater than 65mA; If it is determined that the bias current Ibias is greater than 65mA, it is determined that the DFB laser debugging has failed.

[0011] Optionally, after determining whether the optical power Po3 is greater than the target optical power Pt, the method further includes: If it is determined that the optical power Po3 is greater than the target optical power Pt, the linear ratio E1 and intercept F1 of the optical power and the backlight current are determined according to point 1 and point 2; wherein the coordinates of point 1 are (Po1, backlight current Impd1), and the coordinates of point 2 are (Po2, backlight current Impd2).

[0012] Optionally, after determining whether the bias current Ibias is greater than 65 mA, the method further includes: If it is determined that the bias current Ibias is not greater than 65mA, the optical power Po4 is obtained according to the preset debugging formula and the backlight current Impd4; wherein, the backlight current Impd4=backlight current Impd3+200uA; Determine whether the optical power Po4 is greater than the target optical power Pt; If it is determined that the optical power Po4 is not greater than the target optical power Pt, it is determined that the DFB laser debugging has failed.

[0013] Optionally, after determining whether the optical power Po4 is greater than the target optical power Pt, the method further includes: If it is determined that the optical power Po4 is greater than the target optical power Pt, the linear ratio E1 and intercept F1 of the optical power and the backlight current are determined according to point 1 and point 2; wherein the coordinates of point 1 are (Po1, backlight current Impd1), and the coordinates of point 2 are (Po2, backlight current Impd2).

[0014] On the one hand, a DFB laser optical power debugging device is provided, the device comprising: An optical power acquisition unit, used to acquire a target optical power Pt of the optical module; The optical power acquisition unit is further used to obtain the optical power Po1 and the optical power Po2 according to the preset debugging formula, the backlight current Impd1 and the backlight current Impd2; wherein the preset debugging formula is used to express the relationship between the optical power and the backlight current; backlight current Impd2=backlight current Impd1+500uA; An optical power comparison unit, used to determine whether the optical power Po2 is greater than the target optical power Pt; A ratio and intercept determination unit, for determining a linear ratio E1 and an intercept F1 of the optical power to the backlight current according to point 1 and point 2 if the optical power Po2 is greater than the target optical power Pt; wherein the coordinates of point 1 are (Po1, backlight current Impd1), and the coordinates of point 2 are (Po2, backlight current Impd2); A backlight current determination unit, used to determine a backlight current Impdt1 according to a target light power Pt, a linear ratio E1 and an intercept F1; The optical power acquisition unit is further used to obtain the optical power Pt1 according to a preset debugging formula and the backlight current Impdt1; The optical power comparison unit is also used to determine whether the optical power Pt1 is within the error range of the target optical power Pt; The debugging determination unit is used to end the DFB laser debugging if it is determined that the optical power Pt1 is within the error range of the target optical power Pt.

[0015] On the one hand, an electronic device is provided, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein any one of the above methods is implemented when the processor executes the computer program.

[0016] In one aspect, a storage medium is provided, on which computer program instructions are stored, and when the computer program instructions are executed by a processor, any of the above methods is implemented.

[0017] Compared with the prior art, the beneficial effects of this application are: In the present application, when debugging the optical power of the DFB laser, first, the target optical power Pt of the optical module can be obtained; then, the optical power Po1 and the optical power Po2 can be obtained according to the preset debugging formula, the backlight current Impd1 and the backlight current Impd2; wherein the preset debugging formula is used to express the relationship between the optical power and the backlight current; backlight current Impd2=backlight current Impd1+500uA; next, it can be determined whether the optical power Po2 is greater than the target optical power Pt; then, if the optical power Po2 is greater than the target optical power Pt, the optical power and the backlight current can be determined according to point 1 and point 2. The linear proportion E1 and intercept F1 of the backlight current; wherein, the coordinates of point 1 are (Po1, backlight current Impd1), and the coordinates of point 2 are (Po2, backlight current Impd2); next, the backlight current Impdt1 can be determined according to the target optical power Pt, the linear proportion E1 and the intercept F1; then, the optical power Pt1 can be obtained according to the preset debugging formula and the backlight current Impdt1; next, it can be determined whether the optical power Pt1 is within the error range of the target optical power Pt; finally, if it is determined that the optical power Pt1 is within the error range of the target optical power Pt, the DFB laser debugging can be ended.

[0018] Therefore, in the present application, since it can be seen from the simulation results of the randomly selected prototype that the optical power debugging of the present application can basically be debugged to the target optical power by iterating once or twice, compared with the prior art, the present application greatly reduces the number of debugging times, and thus, not only effectively improves the debugging efficiency, but also improves the debugging accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, the drawings described below are only the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0020] Figure 1 An electronic device provided in an embodiment of the present application; Figure 2 A schematic diagram of a method for debugging the optical power of a DFB laser provided in an embodiment of the present application; Figure 3 A schematic diagram of a DFB laser efficiency curve provided in an embodiment of the present application; Figure 4 A schematic diagram of a DFB laser optical power debugging device provided in an embodiment of the present application.

[0021] Markings in the figure: 10-DFB laser optical power debugging equipment, 101-processor, 102-memory, 103-I / O interface, 104-database, 40-DFB laser optical power debugging device, 401-optical power acquisition unit, 402-optical power comparison unit, 403-ratio and intercept determination unit, 404-backlight current determination unit, 405-debugging determination unit, 406-debugging formula determination unit. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme in the embodiment of the present application will be clearly and completely described below in conjunction with the drawings in the embodiment of the present application. Obviously, the described embodiment is only a part of the embodiment of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other arbitrarily. In addition, although the logical order is shown in the flow chart, in some cases, the steps shown or described can be performed in an order different from that here.

[0023] As we all know, Distributed Feed Back (DFB) lasers have the characteristics of high speed, monochromaticity, narrow linewidth and high power output. Therefore, DFB lasers are widely used in optical communications and passive optical networks (PON), such as optical modules, optical modems, optical boards and FTTR access networks. The stability of optical power is one of the key indicators of DFB laser performance. Therefore, in practical applications, it is necessary to adjust the optical power to ensure that the output power of the DFB laser remains stable for a long time to avoid the impact of power fluctuations on the system.

[0024] At present, the step method, binary method, etc. are often used to adjust the backlight current Impd to change the bias current Ibias to achieve the target average optical power. However, since the efficiency of each DFB laser is different, and the inclination of the light intensity-current-voltage (Light Intensity-Current-Voltage, ‌LIV) curve of the DFB laser is inconsistent, when the step method or binary method is used for optical power debugging, multiple debugging is required to achieve the target average optical power. Therefore, it takes a lot of time to switch and test the optical power meter, which seriously affects the debugging efficiency and accuracy; in addition, since the existing debugging method is to perform iterative calculations using the linear ratio between the average optical power of the laser and the backlight current Impd, and the laser's optical power-bias current PI curve and the backlight current-bias current MI curve are not curves passing through the origin, so performing such a linear superposition calculation will also perform multiple calculations, which further seriously affects the debugging efficiency and accuracy.

[0025] Based on this, an embodiment of the present application provides a DFB laser optical power debugging method, in which, first, the target optical power Pt of the optical module can be obtained; then, the optical power Po1 and the optical power Po2 can be obtained according to the preset debugging formula, the backlight current Impd1 and the backlight current Impd2; wherein the preset debugging formula is used to express the relationship between the optical power and the backlight current; backlight current Impd2=backlight current Impd1+500uA; next, it can be determined whether the optical power Po2 is greater than the target optical power Pt; then, if the optical power Po2 is greater than the target optical power Pt, it can be determined according to point 1 and point 2. Determine the linear ratio E1 and intercept F1 of the optical power and the backlight current; wherein, the coordinates of point 1 are (Po1, backlight current Impd1), and the coordinates of point 2 are (Po2, backlight current Impd2); next, the backlight current Impdt1 can be determined according to the target optical power Pt, the linear ratio E1 and the intercept F1; then, the optical power Pt1 can be obtained according to the preset debugging formula and the backlight current Impdt1; next, it can be determined whether the optical power Pt1 is within the error range of the target optical power Pt; finally, if it is determined that the optical power Pt1 is within the error range of the target optical power Pt, the DFB laser debugging can be ended. Therefore, in the present application, since it can be seen from the randomly selected prototype that the optical power debugging of the present application can basically be debugged to the target optical power by iterating once or twice, compared with the prior art, the present application greatly reduces the number of debugging times, and thus, not only effectively improves the debugging efficiency, but also improves the debugging accuracy.

[0026] After introducing the design ideas of the embodiments of the present application, the following briefly introduces the application scenarios to which the technical solutions of the embodiments of the present application can be applied. It should be noted that the application scenarios introduced below are only used to illustrate the embodiments of the present application and are not limited. In the specific implementation process, the technical solutions provided by the embodiments of the present application can be flexibly applied according to actual needs.

[0027] like Figure 1 As shown, an electronic device provided in an embodiment of the present application is shown, and the electronic device may specifically be a DFB laser optical power debugging device 10.

[0028] The DFB laser optical power debugging device 10 can be used to debug the DFB laser optical power, for example, it can be a personal computer (PC), a server and a laptop. The DFB laser optical power debugging device 10 may include one or more processors 101, a memory 102, an I / O interface 103 and a database 104. Specifically, the processor 101 may be a central processing unit (CPU), or a digital processing unit, etc. The memory 102 may be a volatile memory, such as a random-access memory (RAM); the memory 102 may also be a non-volatile memory, such as a read-only memory, a flash memory, a hard disk drive (HDD) or a solid-state drive (SSD); or the memory 102 is any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory 102 may be a combination of the above memories. The memory 102 may store some program instructions of the method for debugging the optical power of the DFB laser provided in the embodiment of the present application, and these program instructions can be used to implement the steps of the method for debugging the optical power of the DFB laser provided in the embodiment of the present application when executed by the processor 101, so as to solve the problem that the efficiency and accuracy of the existing optical power debugging method are low. The database 104 may be used to store data such as the target optical power Pt, the preset debugging formula, the backlight current Impd1, the backlight current Impd2, the optical power Po1 and the optical power Po2 involved in the solution provided in the embodiment of the present application.

[0029] In the embodiment of the present application, the DFB laser optical power debugging device 10 can obtain the target optical power Pt of the optical module through the I / O interface 103, and then the processor 101 of the DFB laser optical power debugging device 10 will improve the efficiency and accuracy of optical power debugging according to the program instructions of the DFB laser optical power debugging method provided in the embodiment of the present application in the memory 102. In addition, the target optical power Pt, the preset debugging formula, the backlight current Impd1, the backlight current Impd2, the optical power Po1 and the optical power Po2 and other data can also be stored in the database 104.

[0030] Of course, the method provided in the embodiment of the present application is not limited to Figure 1 The application scenarios shown can also be used in other possible application scenarios, and the embodiments of the present application are not limited thereto. Figure 1 The functions that can be realized by each device in the application scenario shown will be described in the subsequent method embodiments, and will not be described in detail here. Below, the method of the embodiment of the present application will be introduced in conjunction with the accompanying drawings.

[0031] like Figure 2 FIG. 1 is a schematic diagram of a method for debugging the optical power of a DFB laser provided in an embodiment of the present application. The method can be performed by Figure 1 The DFB laser optical power debugging device 10 is used to perform the method. Specifically, the process of the method is described as follows.

[0032] Step 1: Obtain the target optical power Pt of the optical module.

[0033] When initially debugging the optical power, the modulation current Imod can be set to 0.

[0034] In addition, in order to achieve the purpose of improving the efficiency of optical power debugging, in an embodiment of the present application, before performing optical power modulation, it is also necessary to determine a "preset debugging formula" for performing optical power debugging.

[0035] like Figure 3 As shown, it is a schematic diagram of the efficiency curve of the DFB laser provided in an embodiment of the present application, wherein the PI curve corresponding to the optical power-bias current is Po=AX+B, Po is the optical power, X is the bias current, A is the slope of the PI curve, and B is the intercept of the PI curve; the MI curve corresponding to the backlight current-bias current is Impd=CX+D, Impd is the backlight current, X is the bias current, C is the slope of the MI curve, and D is the intercept of the MI curve.

[0036] Furthermore, according to the PI curve and MI curve of the DFB laser, the preset debugging formula for converting the optical power into the backlight current relationship can be determined as follows: ; Among them, the PI curve is used to represent the relationship between the optical power and the bias current Ibias, and the MI curve is used to represent the relationship between the backlight current Impd and the bias current Ibias.

[0037] Furthermore, for the convenience of calculation, we can It is converted to y=Ex+F; where y is the light power, x is the backlight current, E is the linear ratio of the light power to the backlight current, and F is the intercept of the light power and the backlight current.

[0038] Step 2: Obtain the optical power Po1 and the optical power Po2 according to the preset debugging formula, the backlight current Impd1 and the backlight current Impd2.

[0039] In the embodiment of the present application, a preset debugging formula is used to express the relationship between optical power and backlight current. Backlight current Impd2 = backlight current Impd1 + 500uA. Among them, the wider the range of the backlight current Impd is set, the higher the tolerance for the linear curve relationship between optical power and backlight current, and thus, the higher the debugging accuracy. In addition, the present application adopts the modulation method of automatic power control (APC) to perform optical power debugging.

[0040] In practical applications, for any DFB laser, after it is produced by the manufacturer, it has a corresponding PI curve and an MI curve, wherein A and B in the PI curve Po=AX+B and C and D in the MI curve Impd=CX+D are fixed and known.

[0041] Therefore, in the initial debugging state, E and F in the preset debugging formula y=Ex+F are known parameters. Therefore, by substituting the backlight current Impd1 and the backlight current Impd2 into the preset debugging formula y=Ex+F, the optical power Po1 and the optical power Po2 can be obtained respectively.

[0042] Step 3: Determine whether the optical power Po2 is greater than the target optical power Pt.

[0043] Step 4: If the optical power Po2 is greater than the target optical power Pt, the linear ratio E1 and the intercept F1 of the optical power and the backlight current are determined according to point 1 and point 2.

[0044] In the embodiment of the present application, the coordinates of point 1 are (Po1, backlight current Impd1), and the coordinates of point 2 are (Po2, backlight current Impd2). Based on this, the linear ratio of optical power to backlight current is E1=(Po2-Po1) / (Impd2-Impd1); the intercept of optical power and backlight current is F1=Po2-E1*Impd2.

[0045] Step 5: Determine the backlight current Impdt1 according to the target light power Pt, the linear ratio E1 and the intercept F1.

[0046] In order to adjust the optical power to within the target optical power error range, in the embodiment of the present application, the specific values ​​of the target optical power Pt, the linear ratio E1 and the intercept F1 can be substituted into the formula Impdt1=(Pt-F1) / E1 to determine the corresponding backlight current Impdt1.

[0047] Step 6: Obtain the optical power Pt1 according to the preset debugging formula and the backlight current Impdt1.

[0048] Substituting the backlight current Impdt1 into the preset debugging formula y=Ex+F, the value of the first optical power Pt1 to be modulated can be obtained.

[0049] Step 7: Determine whether the optical power Pt1 is within the error range of the target optical power Pt.

[0050] Step 8: If it is determined that the optical power Pt1 is within the error range of the target optical power Pt, the DFB laser debugging is terminated.

[0051] That is, the optical power debugging has been successful, so the DFB laser debugging can be ended.

[0052] Step 9: If it is determined that the optical power Pt1 is not within the error range of the target optical power Pt, determine whether the optical power Pt1 is greater than the target optical power Pt.

[0053] That is, if it is determined that the optical power Pt1 is not within the error range of the target optical power Pt, it is necessary to iterate once to re-adjust the optical power, and the specific debugging process needs to be performed according to whether the optical power Pt1 is greater than the target optical power Pt.

[0054] Step 10: If it is determined that the optical power Pt1 is greater than the target optical power Pt, then according to point 1 and point 3, the linear ratio E2 and the intercept F2 of the optical power and the backlight current are determined.

[0055] In the embodiment of the present application, the coordinates of point 3 are (Pt1, backlight current Impdt1). Based on this, the linear ratio of optical power to backlight current is E2=(Po1-Pt1) / (Impd1-Impdt1); the intercept of optical power and backlight current is F2=Po1-E2*Impd1.

[0056] Step 11: According to the target optical power Pt, the linear ratio E2 and the intercept F2, proceed to the next optical power adjustment.

[0057] The execution process of this step 11 is the same as the execution process of step 5, that is, the specific values ​​of the target optical power Pt, the linear ratio E2 and the intercept F2 can be substituted into the formula Impdt2=(Pt-F2) / E2 to determine the corresponding backlight current Impdt2.

[0058] Step 12: If it is determined that the optical power Pt1 is not greater than the target optical power Pt, then according to point 2 and point 3, the linear ratio E3 and the intercept F3 of the optical power and the backlight current are determined.

[0059] In the embodiment of the present application, the linear ratio of the optical power to the backlight current is E3=(Po2-Pt1) / (Impd2-Impdt1); the intercept of the optical power and the backlight current is F3=Po2-E3*Impd2.

[0060] Step 13: According to the target optical power Pt, the linear ratio E3 and the intercept F3, proceed to the next optical power adjustment.

[0061] The execution process of this step 13 is the same as the execution process of step 5, that is, the specific values ​​of the target optical power Pt, the linear ratio E3 and the intercept F3 can be substituted into the formula Impdt3=(Pt-F3) / E3 to determine the corresponding backlight current Impdt3.

[0062] Step 14: If it is determined that the optical power Po2 is not greater than the target optical power Pt, the optical power Po3 is obtained according to a preset debugging formula and the backlight current Impd3.

[0063] In the embodiment of the present application, the backlight current Impd3 = the backlight current Impd2 + 200 uA. That is, the backlight current Impd3 is substituted into the preset debugging formula y = Ex + F → Po3 = E * Impd3 + F to obtain the optical power Po3.

[0064] Step 15: Determine whether the optical power Po3 is greater than the target optical power Pt.

[0065] Step 16: If it is determined that the optical power Po3 is not greater than the target optical power Pt, determine whether the bias current Ibias is greater than 65 mA.

[0066] Step 17: If it is determined that the bias current Ibias is greater than 65mA, it is determined that the DFB laser debugging has failed.

[0067] When the bias current Ibias is too large, the output power of the DFB laser is likely to be too large, which may not only damage the DFB laser, but also affect the performance and life of the DFB laser. Therefore, in the embodiment of the present application, if it is determined that the bias current Ibias is greater than the threshold current 65mA, it can be determined that the DFB laser debugging has failed.

[0068] Step 18: If it is determined that the optical power Po3 is greater than the target optical power Pt, the linear ratio E1 and the intercept F1 of the optical power and the backlight current are determined according to point 1 and point 2.

[0069] In the embodiment of the present application, the coordinates of point 1 are (Po1, backlight current Impd1), and the coordinates of point 2 are (Po2, backlight current Impd2). The execution process of step 18 is the same as the execution process of step 4.

[0070] Step 19: If it is determined that the bias current Ibias is not greater than 65 mA, the optical power Po4 is obtained according to a preset debugging formula and the backlight current Impd4.

[0071] In the embodiment of the present application, the backlight current Impd4=backlight current Impd3+200uA.

[0072] The execution process of this step 19 is the same as the execution process of step 14, that is, the backlight current Impd4 is substituted into the preset debugging formula y=Ex+F→Po4=E*Impd4+F to obtain the optical power Po4.

[0073] Step 20: Determine whether the optical power Po4 is greater than the target optical power Pt.

[0074] Step 21: If it is determined that the optical power Po4 is not greater than the target optical power Pt, it is determined that the DFB laser debugging has failed.

[0075] Since the optical power Po4 is calculated by increasing the backlight current Impd value for multiple times, if it is determined that the optical power Po4 is still not greater than the target optical power Pt, then in order to improve the debugging efficiency, this debugging process can be directly determined as a DFB laser debugging failure.

[0076] Step 22: If it is determined that the optical power Po4 is greater than the target optical power Pt, the linear ratio E1 and the intercept F1 of the optical power and the backlight current are determined according to point 1 and point 2.

[0077] In the embodiment of the present application, the coordinates of point 1 are (Po1, backlight current Impd1), and the coordinates of point 2 are (Po2, backlight current Impd2).

[0078] The execution process of this step 22 is the same as the execution process of step 4, that is, the linear ratio of the optical power to the backlight current is E1=(Po2-Po1) / (Impd2-Impd1); the intercept of the optical power and the backlight current is F1=Po2-E1*Impd2. Specific embodiment: Assume that the target optical power is 3.5dbm (2238.72uW); the error range is + / -100uW; randomly select 5 groups of DFB lasers for optical power debugging.

[0080] As shown in Table 1, which is a result diagram of simulation debugging provided by an embodiment of the present invention, it can be seen from the randomly selected prototypes that prototypes SN1 and SN4 debugged to the target optical power after only two iterations, while prototypes SN2, SN3 and SN5 debugged to the target optical power after only one iteration. In other words, the optical power debugging of the present application basically requires one iteration, and the target optical power can be debugged at most twice.

[0081] Table 1 Simulation debugging results

[0082] To sum up, in the embodiments of the present application, since the optical power debugging of the present application can basically be debugged to the target optical power by iterating once or twice, compared with the prior art, the present application greatly reduces the number of debugging times, thereby effectively improving not only the efficiency of debugging, but also the accuracy of debugging.

[0083] Based on the same inventive concept, the embodiment of the present application also provides a DFB laser optical power debugging device 40, such as Figure 4 As shown, the DFB laser optical power debugging device 40 includes: An optical power acquisition unit 401 is used to acquire a target optical power Pt of an optical module; The optical power acquisition unit 401 is further used to obtain the optical power Po1 and the optical power Po2 according to the preset debugging formula, the backlight current Impd1 and the backlight current Impd2; wherein the preset debugging formula is used to express the relationship between the optical power and the backlight current; backlight current Impd2=backlight current Impd1+500uA; An optical power comparison unit 402, used to determine whether the optical power Po2 is greater than the target optical power Pt; The ratio and intercept determination unit 403 is used to determine the linear ratio E1 and intercept F1 of the optical power and the backlight current according to point 1 and point 2 if the optical power Po2 is greater than the target optical power Pt; wherein the coordinates of point 1 are (Po1, backlight current Impd1), and the coordinates of point 2 are (Po2, backlight current Impd2); A backlight current determination unit 404, configured to determine a backlight current Impdt1 according to a target light power Pt, a linear ratio E1 and an intercept F1; The optical power acquisition unit 401 is further used to obtain the optical power Pt1 according to a preset debugging formula and the backlight current Impdt1; The optical power comparison unit 402 is further used to determine whether the optical power Pt1 is within the error range of the target optical power Pt; The debugging determination unit 405 is used to end the DFB laser debugging if it is determined that the optical power Pt1 is within the error range of the target optical power Pt.

[0084] Optionally, the optical power comparison unit 402 is further configured to: If it is determined that the optical power Pt1 is not within the error range of the target optical power Pt, then determining whether the optical power Pt1 is greater than the target optical power Pt; If it is determined that the optical power Pt1 is greater than the target optical power Pt, the linear ratio E2 and the intercept F2 of the optical power and the backlight current are determined according to point 1 and point 3; wherein the coordinates of point 3 are (Pt1, backlight current Impdt1); According to the target optical power Pt, the linear ratio E2 and the intercept F2, proceed to the next optical power adjustment.

[0085] Optionally, the ratio and intercept determination unit 403 is further used to: If it is determined that the optical power Pt1 is not greater than the target optical power Pt, then the linear ratio E3 and the intercept F3 of the optical power and the backlight current are determined according to point 2 and point 3; According to the target optical power Pt, the linear ratio E3 and the intercept F3, proceed to the next optical power adjustment.

[0086] Optionally, the DFB laser optical power debugging device 40 further includes a debugging formula determination unit 406, which is used to: According to the PI curve and MI curve of the DFB laser, a preset debugging formula is determined; wherein the PI curve is used to represent the relationship between the optical power and the bias current Ibias, and the MI curve is used to represent the relationship between the backlight current Impd and the bias current Ibias.

[0087] Optionally, the optical power acquisition unit 401 is further used for: If it is determined that the optical power Po2 is not greater than the target optical power Pt, the optical power Po3 is obtained according to the preset debugging formula and the backlight current Impd3; wherein, the backlight current Impd3=backlight current Impd2+200uA; Determine whether the optical power Po3 is greater than the target optical power Pt; If it is determined that the optical power Po3 is not greater than the target optical power Pt, then it is determined whether the bias current Ibias is greater than 65mA; If it is determined that the bias current Ibias is greater than 65mA, it is determined that the DFB laser debugging has failed.

[0088] Optionally, the ratio and intercept determination unit 403 is further used to: If it is determined that the optical power Po3 is greater than the target optical power Pt, the linear ratio E1 and intercept F1 of the optical power and the backlight current are determined according to point 1 and point 2; wherein the coordinates of point 1 are (Po1, backlight current Impd1), and the coordinates of point 2 are (Po2, backlight current Impd2).

[0089] Optionally, the optical power acquisition unit 401 is further used for: If it is determined that the bias current Ibias is not greater than 65mA, the optical power Po4 is obtained according to the preset debugging formula and the backlight current Impd4; wherein, the backlight current Impd4=backlight current Impd3+200uA; Determine whether the optical power Po4 is greater than the target optical power Pt; If it is determined that the optical power Po4 is not greater than the target optical power Pt, it is determined that the DFB laser debugging has failed.

[0090] Optionally, the ratio and intercept determination unit 403 is further used to: If it is determined that the optical power Po4 is greater than the target optical power Pt, the linear ratio E1 and intercept F1 of the optical power and the backlight current are determined according to point 1 and point 2; wherein the coordinates of point 1 are (Po1, backlight current Impd1), and the coordinates of point 2 are (Po2, backlight current Impd2).

[0091] The DFB laser optical power debugging device 40 can be used to perform Figure 2 The method implemented in the embodiment shown in FIG. 1 is a method implemented in the embodiment shown in FIG. 1 . Therefore, the functions that can be realized by each functional module of the DFB laser optical power debugging device 40 can be referred to. Figure 2 The description of the illustrated embodiment is not repeated in detail.

[0092] In some possible implementations, various aspects of the method provided in the present application may also be implemented in the form of a program part, which includes a program code. When the program part is run on a computer device, the program code is used to enable the computer device to execute the steps of the method according to various exemplary embodiments of the present application described above in this specification. For example, the computer device may execute the following steps: Figure 2 The method performed in the illustrated embodiment.

[0093] Those skilled in the art can understand that all or part of the steps of the above method embodiment can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the steps of the above method embodiment are executed; and the aforementioned storage medium includes: various media that can store program codes, such as mobile storage devices, read-only memory (ROM), random access memory (RAM), magnetic disks or optical disks. Alternatively, if the above integrated unit of the present invention is implemented in the form of a software function module and sold or used as an independent part, it can also be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present invention can be essentially or in other words, the part that contributes to the prior art can be embodied in the form of a software part, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to execute all or part of the methods described in various embodiments of the present invention. And the aforementioned storage medium includes: various media that can store program codes, such as mobile storage devices, ROM, RAM, magnetic disks or optical disks.

[0094] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0095] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A method for debugging the optical power of a DFB laser, characterized in that: The method comprises: Get the target optical power Pt of the optical module; According to the preset debugging formula, the backlight current Impd1 and the backlight current Impd2, the optical power Po1 and the optical power Po2 are obtained; wherein the preset debugging formula is used to express the relationship between the optical power and the backlight current; the backlight current Impd2=backlight current Impd1+500uA; Determine whether the optical power Po2 is greater than the target optical power Pt; If the optical power Po2 is greater than the target optical power Pt, the linear ratio E1 and the intercept F1 of the optical power and the backlight current are determined according to point 1 and point 2; wherein the coordinates of point 1 are (Po1, backlight current Impd1), and the coordinates of point 2 are (Po2, backlight current Impd2); According to the target light power Pt, the linear ratio E1 and the intercept F1, the backlight current Impdt1 is determined; According to the preset debugging formula and the backlight current Impdt1, the optical power Pt1 is obtained; Determine whether the optical power Pt1 is within the error range of the target optical power Pt; If it is determined that the optical power Pt1 is within the error range of the target optical power Pt, the DFB laser debugging is terminated.

2. The method according to claim 1, characterized in that After determining whether the first optical power Pt1 is within an error range of the target optical power Pt, the method further includes: If it is determined that the optical power Pt1 is not within the error range of the target optical power Pt, then determining whether the optical power Pt1 is greater than the target optical power Pt; If it is determined that the optical power Pt1 is greater than the target optical power Pt, the linear ratio E2 and the intercept F2 of the optical power and the backlight current are determined according to point 1 and point 3; wherein the coordinates of point 3 are (Pt1, backlight current Impdt1); According to the target optical power Pt, the linear ratio E2 and the intercept F2, proceed to the next optical power adjustment.

3. The method according to claim 2, characterized in that After determining whether the optical power Pt1 is greater than the target optical power Pt, the method further includes: If it is determined that the optical power Pt1 is not greater than the target optical power Pt, then the linear ratio E3 and the intercept F3 of the optical power and the backlight current are determined according to point 2 and point 3; According to the target optical power Pt, the linear ratio E3 and the intercept F3, proceed to the next optical power adjustment.

4. The method according to claim 1, characterized in that Before obtaining the optical power Po1 and the optical power Po2 according to the preset debugging formula, the backlight current Impd1 and the backlight current Impd2, the method further includes: The preset debugging formula is determined according to the PI curve and the MI curve of the DFB laser; wherein the PI curve is used to represent the relationship between the optical power and the bias current Ibias, and the MI curve is used to represent the relationship between the backlight current Impd and the bias current Ibias.

5. The method according to claim 1, characterized in that After determining whether the optical power Po2 is greater than the target optical power Pt, the method further includes: If it is determined that the optical power Po2 is not greater than the target optical power Pt, the optical power Po3 is obtained according to the preset debugging formula and the backlight current Impd3; wherein, the backlight current Impd3=backlight current Impd2+200uA; Determine whether the optical power Po3 is greater than the target optical power Pt; If it is determined that the optical power Po3 is not greater than the target optical power Pt, then it is determined whether the bias current Ibias is greater than 65mA; If it is determined that the bias current Ibias is greater than 65mA, it is determined that the DFB laser debugging has failed.

6. The method according to claim 5, characterized in that After determining whether the optical power Po3 is greater than the target optical power Pt, the method further includes: If it is determined that the optical power Po3 is greater than the target optical power Pt, the linear ratio E1 and intercept F1 of the optical power and the backlight current are determined according to point 1 and point 2; wherein the coordinates of point 1 are (Po1, backlight current Impd1), and the coordinates of point 2 are (Po2, backlight current Impd2).

7. The method according to claim 5, characterized in that After determining whether the bias current Ibias is greater than 65 mA, the method further includes: If it is determined that the bias current Ibias is not greater than 65mA, the optical power Po4 is obtained according to the preset debugging formula and the backlight current Impd4; wherein, the backlight current Impd4=backlight current Impd3+200uA; Determine whether the optical power Po4 is greater than the target optical power Pt; If it is determined that the optical power Po4 is not greater than the target optical power Pt, it is determined that the DFB laser debugging has failed.

8. The method according to claim 7, characterized in that After determining whether the optical power Po4 is greater than the target optical power Pt, the method further includes: If it is determined that the optical power Po4 is greater than the target optical power Pt, the linear ratio E1 and intercept F1 of the optical power and the backlight current are determined according to point 1 and point 2; wherein the coordinates of point 1 are (Po1, backlight current Impd1), and the coordinates of point 2 are (Po2, backlight current Impd2).

9. A DFB laser optical power debugging device, characterized in that: The device comprises: An optical power acquisition unit, used to acquire a target optical power Pt of the optical module; The optical power acquisition unit is further used to obtain the optical power Po1 and the optical power Po2 according to the preset debugging formula, the backlight current Impd1 and the backlight current Impd2; wherein the preset debugging formula is used to express the relationship between the optical power and the backlight current; backlight current Impd2=backlight current Impd1+500uA; An optical power comparison unit, used to determine whether the optical power Po2 is greater than the target optical power Pt; A ratio and intercept determination unit, for determining a linear ratio E1 and an intercept F1 of the optical power to the backlight current according to point 1 and point 2 if the optical power Po2 is greater than the target optical power Pt; wherein the coordinates of point 1 are (Po1, backlight current Impd1), and the coordinates of point 2 are (Po2, backlight current Impd2); A backlight current determination unit, used to determine a backlight current Impdt1 according to a target light power Pt, a linear ratio E1 and an intercept F1; The optical power acquisition unit is further used to obtain the optical power Pt1 according to a preset debugging formula and the backlight current Impdt1; The optical power comparison unit is also used to determine whether the optical power Pt1 is within the error range of the target optical power Pt; The debugging determination unit is used to end the DFB laser debugging if it is determined that the optical power Pt1 is within the error range of the target optical power Pt.

10. An electronic device, characterized in that: The device comprises: A memory for storing program instructions; A processor is used to call the program instructions stored in the memory, and execute any method according to claims 1-8 according to the obtained program instructions.

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