CN109802724B - Method and device for monitoring service life of laser of optical module - Google Patents
Method and device for monitoring service life of laser of optical module Download PDFInfo
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- CN109802724B CN109802724B CN201811550705.5A CN201811550705A CN109802724B CN 109802724 B CN109802724 B CN 109802724B CN 201811550705 A CN201811550705 A CN 201811550705A CN 109802724 B CN109802724 B CN 109802724B
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Abstract
The invention discloses a method and a device for monitoring the service life of an optical module laser, belonging to the technical field of optical communication, wherein the method comprises the following steps: acquiring the current temperature, the current driving current and the current emitted light power of a laser of an optical module; determining the current luminous efficiency of the laser of the optical module according to the acquired current temperature, the acquired current driving current and the acquired current emitted light power; and comparing the current luminous efficiency of the optical module laser with the reference luminous efficiency of the optical module laser, and determining the service life of the optical module laser according to the comparison result. Therefore, the judgment of the service life is more accurate, the reliability of the service life judgment is further improved, the module can be fully used, and the probability of communication interruption caused by the short service life of the optical module is reduced.
Description
Technical Field
The present invention relates to the field of optical communication technology, and in particular, to a method, an apparatus, a computer device, and a storage medium for monitoring the lifetime of an optical module laser.
Background
At present, a method for monitoring the service life of an optical module laser in the optical module industry is an alarm method based on the drive current threshold of the optical module laser, and telecommunication equipment manufacturers judge according to the current drive current of the optical module laser, but the methods have limitations. The laser of the optical module in the optical module generates laser when the driving current is larger than a certain threshold, the driving current is different, the output optical power is different, the influence of the temperature on the relation curve of the optical power and the driving current is very large, and the service life of the module is difficult to measure by using one driving current in visual perception. For the driving current itself, the performance of the optical module laser cannot be reflected, because the driving current is generated by an external driving circuit, and is not the characteristic of the optical module laser, it is not easy to directly judge the current performance of the module.
In another method, a timing function is added to the optical module, timing is performed only when the module is powered on, and the service life of the optical module laser is judged to be over when the accumulated module timing exceeds a preset time. However, the modules with long service life originally cannot be fully utilized by using the method, which causes great waste, and for the modules with the service life far shorter than the preset time, the method can cause the whole communication system to be incapable of working normally.
However, at present, whether an alarm mode based on a drive current threshold of an optical module laser used in the current optical module industry, a mode used in the telecommunication industry for judging the service life according to the current drive current of the optical module laser, or a mode of adopting module timing are judged according to a single standard, and the individual difference of the optical module and the difference of the working environment temperature are ignored, so that the actual service life of each module cannot be accurately estimated, and meanwhile, the drive current is generated by an external circuit and is irrelevant to the optical module laser, so that the actual service life of each module cannot be accurately obtained, a certain degree of misjudgment is caused, and unnecessary waste is caused.
Disclosure of Invention
Based on this, in order to solve the technical problem that the actual life of each module cannot be accurately estimated in the related art, the invention provides a method, a device, computer equipment and a storage medium for monitoring the laser life of an optical module.
In a first aspect, there is provided a method of monitoring the lifetime of an optical module laser, comprising:
acquiring the current temperature, the current driving current and the current emitted light power of a laser of an optical module;
determining the current luminous efficiency of the laser of the optical module according to the acquired current temperature, the acquired current driving current and the acquired current emitted light power;
and comparing the current luminous efficiency of the optical module laser with the reference luminous efficiency of the optical module laser, and determining the service life of the optical module laser according to the comparison result.
In a second aspect, there is provided an apparatus for monitoring the lifetime of a laser of an optical module, comprising:
the data acquisition unit is used for acquiring the current temperature, the current driving current and the current emitted light power of the laser of the optical module;
the efficiency determining unit is used for determining the current luminous efficiency of the laser of the optical module according to the acquired current temperature, the acquired current driving current and the acquired current emitted light power;
and the service life determining unit is used for comparing the current luminous efficiency of the optical module laser with the reference luminous efficiency of the optical module laser and determining the service life of the optical module laser according to the comparison result.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:
the method, the device, the computer equipment and the storage medium for monitoring the service life of the laser of the optical module are provided
The service life is judged by utilizing the luminous efficiency of the optical module laser, the judgment is not carried out by adopting a single driving current value, but the driving current and the luminous power of the optical module at a plurality of temperatures are tested firstly when the optical module leaves a factory, the reference luminous efficiency corresponding to different temperatures is calculated, the relation between the temperature and the reference luminous efficiency is manufactured, and the relation is put into the optical module. When the optical module is used in the current network, the optical module can acquire the current working temperature, the light emitting power of the optical module laser and the driving current of the optical module laser driver in real time, calculate the current light emitting efficiency according to the current working temperature, and compare the current light emitting efficiency with the reference light emitting efficiency value to judge whether the service life of the optical module laser is up or not according to the set reference light emitting efficiency value. Therefore, the judgment of the service life is more accurate, the reliability of the service life judgment is further improved, the module can be fully used, and the probability of communication interruption caused by the short service life of the optical module is reduced.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
FIG. 1 is an environmental diagram of an implementation of a method for monitoring the lifetime of a laser of an optical module provided in one embodiment.
FIG. 2 is a flow chart illustrating a method of monitoring optical module laser lifetime according to an exemplary embodiment.
Fig. 3 is a flowchart illustrating a specific implementation of step S200 in the method for monitoring the lifetime of the laser of the optical module according to the corresponding embodiment of fig. 2.
Fig. 4 is a flowchart illustrating a specific implementation of step S300 in the method for monitoring the lifetime of the laser of the optical module according to the corresponding embodiment of fig. 2.
Fig. 5 is a flowchart illustrating a specific implementation of step S310 in the method for monitoring the lifetime of the laser of the optical module according to the corresponding embodiment of fig. 4.
Fig. 6 is a flowchart illustrating a specific implementation of step S310 in the method for monitoring the lifetime of the laser of the optical module according to the corresponding embodiment of fig. 4.
Fig. 7 is a flowchart illustrating a specific implementation of step S313 in the method for monitoring the lifetime of the laser of the optical module according to the corresponding embodiment in fig. 5 or fig. 6.
Fig. 8 is a flow chart illustrating another method of monitoring the lifetime of a light module laser according to the corresponding embodiment of fig. 6.
Fig. 9 is a flowchart illustrating a specific implementation of step S3102 in the method for monitoring the lifetime of the laser of the optical module according to the corresponding embodiment of fig. 8.
Fig. 10 is a flow chart illustrating another method of monitoring the lifetime of a light module laser according to the corresponding embodiment of fig. 6.
Fig. 11 is a flowchart illustrating a specific implementation of step S300 in the method for monitoring the lifetime of the laser of the optical module according to the corresponding embodiment of fig. 2.
FIG. 12 is a block diagram illustrating an apparatus for monitoring the lifetime of a light module laser in accordance with one exemplary embodiment.
Fig. 13 schematically shows the driving current versus emitted optical power for the light module laser at different temperatures.
FIG. 14 is a block diagram illustrating yet another apparatus for monitoring the lifetime of a light module laser in accordance with an exemplary embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Fig. 1 is a diagram of an implementation environment of a method for monitoring the lifetime of a laser of a light module provided in an embodiment, as shown in fig. 1, in the implementation environment, a light module 100 on a telecommunication device is included, and the light module 100 includes a monitoring module 110 and a light module laser 120.
The telecommunication equipment is an equipment interconnected with the external network through an optical fiber, and in the equipment, the optical module 100 is generally used to perform the interconversion between the optical signal and the electrical signal.
The optical module 100 includes a monitoring module 110, an optical module laser 120, and a low-speed management interface 1101, so that an external device can control the module and obtain corresponding state and parameter information of the module. Monitoring and control of various parameters of the optical module, judgment of configuration information and states of the module, and storage and uploading of data are basically realized by the monitoring module 110, and according to a uniform management interface protocol, external equipment can access and control data through an I2C bus. The monitoring module 110 may collect the temperature, the current driving current, and the current emitted light power of the optical module, then synchronously calculate the current light emitting efficiency according to these parameters, and finally compare the current light emitting efficiency with the reference light emitting efficiency to determine whether the lifetime of the optical module laser 110 has reached the limit.
It should be noted that the monitoring module 110 and the optical module laser 120 may be connected through bluetooth, USB (Universal Serial Bus), or other communication connection methods, which is not limited herein.
As shown in fig. 2, in an embodiment, a method for monitoring the lifetime of an optical module laser is provided, and the method for monitoring the lifetime of an optical module laser can be applied to the monitoring module 110, and specifically includes the following steps:
step S100, acquiring the current temperature, the current driving current and the current emitted light power of a laser of an optical module;
step S200, determining the current luminous efficiency of the laser of the optical module according to the acquired current temperature, the acquired current driving current and the acquired current emitted light power;
step S300, comparing the current luminous efficiency of the optical module laser with the reference luminous efficiency of the optical module laser, and determining the service life of the optical module laser according to the comparison result.
The method mainly comprises the steps of determining the current luminous efficiency of the optical module laser according to the current temperature, the current driving current and the current emitted light power of the optical module laser, and then judging whether the service life of the optical module laser reaches the limit or not according to the comparison between the current luminous efficiency and the reference luminous efficiency. Compared with a mode of judging according to a single standard, such as a mode of alarming based on a drive current threshold of an optical module laser, a mode of judging service life according to the current drive current of the optical module laser, a mode of adopting module timing and the like, the method considers parameters of the current temperature, the current drive current, the current emitted light power and the like of the optical module laser, then comprehensively obtains the current luminous efficiency of the optical module laser, and then judges the service life of the optical module laser according to the reference luminous efficiency of the optical module laser. Therefore, the judgment of the service life is more accurate, the reliability of the service life judgment is further improved, the module can be fully used, and the probability of communication interruption caused by the short service life of the optical module is reduced.
Optionally, fig. 3 is a detailed description of step S200 in the method for monitoring the lifetime of the laser of the optical module according to the corresponding embodiment shown in fig. 2, where step S200 may include the following steps:
step S210, determining a current threshold driving current corresponding to the acquired current temperature according to the stored relation between the temperature of the optical module laser and the threshold driving current;
step S220, determining the current light emitting efficiency of the light module laser according to the obtained current driving current and current emitting light power and the determined current threshold current.
In this embodiment, the calculation formula of the current luminous efficiency is:
where η represents the current luminous efficiency of the optical module laser, PCollectingRepresents the current emitted optical power of the light module laser, ICollectingRepresents the present drive current, I, of the optical module laserth(T) represents a present threshold current of the light module laser, T represents a present ambient temperature of the light module laser. The threshold current is the lowest driving current value of the light generated by the optical module laser, that is, the driving current injected into the optical module laser can generate light with certain power only when the driving current is greater than the threshold current.
The current threshold current of the optical module laser is determined by the current temperature, and the specific method is to determine according to the saved relationship between the temperature of the optical module laser and the threshold driving current. There are various specific methods for determining the stored relationship between the temperature of the optical module laser and the threshold drive current.
In one embodiment, the method for determining the saved relationship between the temperature of the optical module laser and the threshold driving current is as follows: selecting a predetermined number of sample optical modules only of the same type as the optical module lasers according to the principles of maximum, typical and minimum oblique efficiency and threshold current, wherein the sample optical modules comprise sample optical module lasers, the predetermined number can be only 20, 50, 110 and the like, the more the number is, the more accurate the determination is, but the cost is higher, the more the number is, the more the cost is, the more the number is set according to a specific situation, the invention is not limited herein, and 25 examples are taken in this embodiment.
Since the curves of the optical power and the driving current of the optical module laser are different at different temperatures, the threshold currents of the optical module laser are different. As shown in fig. 13, T1Temperature less than T2Temperature, correspondingly, T1Corresponding threshold current Ith1Is also less than T2Corresponding threshold current Ith2. Under the same environment, run eachAnd a sample optical module continuously adjusts the external temperature, and continuously adjusts the driving current of the sample optical module laser within each temperature value until the optical module laser emits light with optical power, and at the moment, a monitoring module in the sample optical module can automatically monitor the current temperature and the current threshold current of the sample optical module. And then, the monitoring module fits the relation between the temperature of the laser of the sample optical module and the threshold driving current according to the obtained data to be used as the relation between the temperature of the laser of the optical module and the threshold driving current.
In one example, the fitting method is to respectively fit the relationship between the temperature of each sample optical module laser and the threshold driving current according to the obtained data, and then fit the relationship between the temperature of each sample optical module laser and the threshold driving current according to the relationship between the temperature of each sample optical module laser and the threshold driving current.
In another embodiment, the fitting method includes obtaining average threshold currents of all sample optical module lasers at different temperatures according to the obtained data, and then fitting a total relationship between the temperatures of all sample optical module lasers and the threshold driving currents according to the average threshold currents of all sample optical module lasers at different temperatures, as a relationship between the temperatures of the optical module lasers and the threshold driving currents.
Alternatively, fig. 4 is a detailed description of step S300 in the method for monitoring the lifetime of the laser of the optical module according to the corresponding embodiment shown in fig. 2, where step S300 may include the following steps:
step S310, determining reference luminous efficiency corresponding to the acquired current temperature according to the acquired current temperature;
step S320, comparing the current luminous efficiency of the light module laser with the determined reference luminous efficiency.
In this embodiment, the reference luminous efficiency of the laser is related to the temperature, the reference luminous efficiencies at different temperatures are different, and the corresponding reference luminous efficiency is determined according to the current temperature after the current temperature needs to be collected.
Optionally, the step S300 of the method for monitoring the lifetime of the laser of the optical module according to the embodiment shown in fig. 4 may include the following steps:
and determining the reference luminous efficiency corresponding to the acquired current temperature by inquiring the stored corresponding table of the temperature of the optical module laser and the reference luminous efficiency according to the acquired current temperature.
Optionally, fig. 5 is a detailed description of step S310 in the method for monitoring the lifetime of a laser of a light module according to the corresponding embodiment of fig. 4, where in the method for monitoring the lifetime of a laser of a light module, the table of correspondence between the temperature of the laser of the light module and the reference luminous efficiency includes reference luminous efficiency corresponding to a plurality of predetermined temperature values, and step S310 may include the following steps for each of the plurality of predetermined temperature values:
step S311, determining a reference driving current corresponding to the predetermined temperature value according to the stored relationship between the temperature of the optical module laser and the reference driving current;
step S312, determining a current threshold driving current corresponding to the acquired current temperature according to the stored relationship between the temperature of the optical module laser and the threshold driving current;
step 313, determining a reference emission light power of the optical module laser;
step S314, determining a reference luminous efficiency corresponding to the predetermined temperature value according to the reference driving current corresponding to the predetermined temperature value, the reference emitted light power and the threshold driving current;
step S315, recording the predetermined temperature value and the corresponding reference luminous efficiency to generate and store a corresponding table of the temperature of the optical module laser and the reference luminous efficiency.
Step S316, determining a reference luminous efficiency corresponding to the acquired current temperature by querying the stored correspondence table between the temperature of the optical module laser and the reference luminous efficiency according to the acquired current temperature.
In this embodiment, the reference luminous efficiency is determined by querying the stored correspondence table between the temperature of the optical module laser and the reference luminous efficiency, and determining the reference luminous efficiency corresponding to the obtained current temperature.
The generation mode of the correspondence table of the temperature of the optical module laser and the reference luminous efficiency is to determine a reference driving current, a reference emission power and a threshold driving current corresponding to the predetermined temperature value according to the current ambient temperature of the optical module laser, then calculate the reference luminous efficiency corresponding to the predetermined temperature value according to the reference driving current, the reference emission power and the threshold driving current corresponding to the predetermined temperature value, then record each predetermined temperature value and the corresponding reference luminous efficiency, and generate the correspondence table of the temperature of the optical module laser and the reference luminous efficiency. The plurality of predetermined temperatures may include-7 ℃, 0.2 ℃, 0.5 ℃, 1.1 ℃, 3 ℃, 23 ℃, 111 ℃ and the like, and may be flexibly set according to specific situations, and the present invention is not limited herein. According to the method, after the current temperature of the optical module laser is obtained, the reference luminous efficiency corresponding to the obtained current temperature can be obtained by directly looking up a table, the subsequent processing process is simple, and the method is suitable for a monitoring module with simple structure and logic.
In one embodiment, the calculation formula of the reference luminous efficiency is as follows:
wherein eta isBOLRepresenting a reference luminous efficiency of said light module laser,
represents a reference emitted optical power of the light module laser, I (T) represents a reference driving current of the light module laser, Ith(T) represents the current threshold of the light module laserThe current, T, represents the current ambient temperature of the light module laser.
Alternatively, fig. 6 is a detailed description of step S310 in the method for monitoring the lifetime of the laser of the optical module according to the corresponding embodiment shown in fig. 4, where step S310 may include the following steps:
step S311, determining a reference driving current corresponding to the obtained current temperature according to the stored relationship between the temperature of the optical module laser and the reference driving current;
step S312, determining a current threshold driving current corresponding to the acquired current temperature according to the stored relationship between the temperature of the optical module laser and the threshold driving current;
step 313, determining a reference emission light power of the optical module laser;
step S314, determining a reference luminous efficiency corresponding to the acquired current temperature according to the reference driving current, the reference emitted luminous power and the threshold driving current.
In this embodiment, the reference luminous efficiency is determined by calculating a reference driving current, a reference emitted light power, and a threshold driving current of the optical module laser according to a current temperature of the optical module laser, and then directly determining the reference luminous efficiency according to the reference driving current, the reference emitted light power, and the threshold driving current. Compared with the method shown in fig. 5, the reference luminous efficiency corresponding to the obtained current temperature is obtained by real-time calculation, the complex early-stage work of manufacturing a relation table is omitted, the space occupied by storing the relation table is saved, and the method can be used for storing the temperature, the driving current, the luminous efficiency and the like of the optical module laser in each time period so as to monitor the state of the optical module laser in real time.
In one embodiment, the calculation formula of the reference luminous efficiency is as follows:
wherein eta isBOLRepresenting a reference luminous efficiency of said light module laser,
represents a reference emitted optical power of the light module laser, I (T) represents a reference driving current of the light module laser, Ith(T) represents a present threshold current of the light module laser, T represents a present ambient temperature of the light module laser.
Alternatively, fig. 7 is a detailed description of step S313 in the method for monitoring the lifetime of the laser of the optical module according to the corresponding embodiment of fig. 5 or fig. 6, where step S313 may include the following steps:
step S3131, respectively obtaining emitted light powers of at least two optical module lasers with the same specification at least two temperature values in a factory state;
step S3132, an average of the emitted light powers is found as a reference emitted light power.
As shown in fig. 14, the light emitted by the optical module laser under the action of the driving current induces the backlight diode and generates a photocurrent, which is then fed back to the automatic power control unit to adjust the bias current to keep the average output optical power stable. I.e. the emitted optical power of the optical module laser is a stable value.
Therefore, in this embodiment, a predetermined number of sample optical modules only of the same type as the optical module lasers can be selected according to the principles of maximum, typical and minimum slope efficiency and threshold current, the sample optical modules include sample optical module lasers, the predetermined number can be only 20, 50, 110, and the like, the more the number is, the more accurate the determination is, but the cost is higher, and the method can be set according to specific situations, the present invention is not limited herein, and 25 examples are taken in this embodiment. And operating each sample optical module in the same environment, and continuously adjusting the external temperature, wherein at the moment, the monitoring module in the sample optical module can automatically monitor the current emitted light power of the sample optical module laser of the sample optical module. And then the monitoring module calculates the emitted light power of the laser of the optical module according to the obtained data.
In one embodiment, the emitted light power of the light module laser is calculated by taking an average value of the obtained data. The concrete formula is as follows:
wherein the content of the first and second substances,
the average value of the emitted light power of all the sample light module lasers at different temperatures is shown, and in this embodiment, is taken as the emitted light power of the light module lasers. n represents the number of the sample optical module lasers, and n is 25 in the present embodiment.
Fig. 8 shows that in one embodiment, fig. 6 corresponds to an embodiment, the method for monitoring the lifetime of a laser of a light module may further comprise the steps of:
step S3101, respectively obtaining reference driving currents of at least two sample optical module lasers of the same specification at least two different temperature values in a factory state;
step S3102, determining a relationship between the temperature of the optical module laser and a reference driving current according to the reference driving current of the sample optical module laser at different temperature values.
In this embodiment, a predetermined number of sample optical modules only of the same type as the optical module lasers may be selected according to a principle that a skew efficiency and a threshold current are maximum, typical, and minimum, where the sample optical modules include sample optical module lasers, and the predetermined number may be only 20, 50, 110, and the like, and the larger the number is, the more accurate the determination is, but the cost is higher, and the number may be set according to a specific situation. And operating each sample optical module in the same environment, and continuously adjusting the external temperature, wherein at the moment, the monitoring module in the sample optical module can automatically monitor the current driving current of the sample optical module laser of the sample optical module. And then the monitoring module fits the relationship between the temperature of the laser of the optical module and the reference driving current according to the obtained data.
Alternatively, fig. 9 is a detailed description of step S3102 in the method for monitoring the lifetime of a light module laser according to the corresponding embodiment of fig. 8, wherein step S310 may include the following steps:
step S31021, determining a relationship between the respective temperature and the driving current of the sample optical module laser according to the reference driving current of the sample optical module laser at different temperature values;
step S31022 of determining a relationship between a primary term coefficient and a secondary term coefficient of a relationship between a temperature and a drive current of each of the sample optical module lasers;
step S31023, obtaining reference driving currents of the optical module laser at least two different temperature values;
step S31024, calculating a relation curve between the temperature of the light module to be tested and the driving current according to the relation curve between the primary term coefficient and the secondary term coefficient and the reference driving current of the light module laser at least two different temperature values.
In this embodiment, the specific step of fitting the relationship between the temperature of the optical module laser and the reference driving current according to the driving currents of the sample optical module lasers of each sample optical module at different temperatures is as follows:
independently calculating a temperature-driving current relation curve for each sample optical module laser, wherein the relation curve is selected to be a quadratic curve, and the formula is as follows:
I(T)＝aT2+bT+c
wherein, I is the driving current, and the unit is mA (milliampere), T is the temperature, and the unit is C (centigrade). a, b and c are quadratic term coefficients, first order term coefficients and constant term coefficients, respectively.
And calculating a quadratic curve equation of the temperature-driving current of the 25 optical modules according to the formula, and counting a quadratic term coefficient a, a first order coefficient b and a constant term coefficient c of all the equations. According to the above statistical results, fitting a relation curve of a quadratic coefficient a and a first order coefficient b of the quadratic curve by using a first order curve equation, wherein the fitting formula is as follows:
a＝p1×b+p2
where a is the coefficient of the quadratic term of the quadratic curve, here the dependent variable, and b is the coefficient of the first order of the quadratic curve, here the independent variable. p is a radical of1Is the coefficient of the first order of the equation, p2Is a constant term coefficient.
Then has an error formula
To p1And p2And (3) solving partial derivatives to obtain an equation set:
let the error value S be 0, obtain a system of linear equations:
obtaining coefficient p of first-order fitting curve1And p2。
And then substituting the first fitting curve of the quadratic coefficient a and the first fitting curve of the first coefficient b into a quadratic equation to obtain an equation:
I(T)＝(p1b+p2)T2+bT+c
at this time, only two unknown coefficients of b and c exist in the quadratic equation.
Then, before leaving the factory, at least two different temperature values are taken for each optical module to be left the factory, in this embodiment, taking 25 ℃ and 85 ℃ as examples, the laser of the optical module is measured respectivelyThe actual drive current of the optical device at 25 ℃ and 85 ℃ was measured, and the values at these two points were substituted into i (t) ═ p1b+p2)T2And in + bT + c, obtaining a quadratic curve equation of the temperature-driving current of the optical module.
Fig. 10 shows that in one embodiment, fig. 6 corresponds to an embodiment, the method for monitoring the lifetime of a laser of a light module may further comprise the steps of:
step S3103, threshold driving currents of at least two sample optical module lasers of the same specification at least two different temperature values are respectively obtained;
step S3106, determining a relationship between the temperature of the optical module laser and the threshold driving current according to the threshold driving current of the sample optical module laser at least two different temperature values.
The method for calculating the threshold driving current has been described in detail in the previous section and will not be further described here.
Optionally, fig. 11 is a detailed description of step S300 in the method for monitoring the lifetime of the laser of the optical module according to the corresponding embodiment shown in fig. 2, where step S300 may include the following steps:
step S360, judging whether the deviation of the current luminous efficiency and the reference luminous efficiency exceeds a preset limit or not;
step S370, determining that the optical module laser reaches a lifetime limit when the deviation exceeds a predetermined limit.
In this embodiment, the method for determining the lifetime of the optical module laser is to compare the current light emission efficiency of the optical module laser with the reference light emission efficiency of the optical module laser, and determine the lifetime end of the optical module laser if the deviation exceeds a predetermined limit, for example, 90%, 60%, 40%, and the like, which may be specifically 20% in this embodiment, that is, determine the lifetime end of the optical module laser if the current light emission efficiency of the optical module laser is lower than 80% of the reference light emission efficiency of the optical module laser.
As shown in fig. 12, in an embodiment, an apparatus for monitoring the lifetime of an optical module laser is provided, and the apparatus for monitoring the lifetime of an optical module laser may be integrated in the monitoring module 110, and specifically may include a data obtaining unit 111, an efficiency determining unit 112, and a lifetime determining unit 113.
The data acquisition unit 111 is configured to acquire a current temperature, a current driving current, and a current emitted optical power of a laser of the optical module;
an efficiency determining unit 112, configured to determine a current light emitting efficiency of the light module laser according to the obtained current temperature, current driving current, and current emitted light power;
a lifetime determining unit 113, configured to compare the current light emitting efficiency of the optical module laser with a reference light emitting efficiency of the optical module laser, and determine a lifetime of the optical module laser according to a comparison result.
The implementation processes of the functions and actions of each module in the device are specifically described in detail in the implementation processes of the corresponding steps in the method for monitoring the service life of the laser of the optical module, and are not described herein again.
It should be noted that although in the above detailed description several modules or units of the device for action execution are mentioned, such a division is not mandatory. Indeed, the features and functionality of two or more modules or units described above may be embodied in one module or unit, according to embodiments of the present disclosure. Conversely, the features and functions of one module or unit described above may be further divided into embodiments by a plurality of modules or units.
Moreover, although the steps of the methods of the present disclosure are depicted in the drawings in a particular order, this does not require or imply that the steps must be performed in this particular order, or that all of the depicted steps must be performed, to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step execution, and/or one step broken down into multiple step executions, etc.
Furthermore, the above-described figures are merely schematic illustrations of processes involved in methods according to exemplary embodiments of the invention, and are not intended to be limiting. It will be readily understood that the processes shown in the above figures are not intended to indicate or limit the chronological order of the processes. In addition, it is also readily understood that these processes may be performed synchronously or asynchronously, e.g., in multiple modules.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
Claims (10)
1. A method of monitoring the lifetime of a laser of an optical module, comprising:
acquiring the current temperature, the current driving current and the current emitted light power of a laser of an optical module;
determining the current luminous efficiency of the laser of the optical module according to the acquired current temperature, the acquired current driving current and the acquired current emitted light power;
and comparing the current luminous efficiency of the optical module laser with the reference luminous efficiency of the optical module laser, and determining the service life of the optical module laser according to the comparison result.
2. The method of claim 1, wherein said determining a present luminous efficiency of said light module laser from said obtained present temperature, present drive current and present emitted optical power comprises:
determining a current threshold driving current corresponding to the acquired current temperature according to the stored relation between the temperature of the optical module laser and the threshold driving current;
and determining the current luminous efficiency of the laser of the light module according to the obtained current driving current and current emitted light power and the determined current threshold current.
3. The method of claim 1, wherein the comparing the current luminous efficiency of the light module laser to the reference luminous efficiency of the light module laser comprises:
determining a reference luminous efficiency corresponding to the acquired current temperature according to the acquired current temperature;
comparing the current luminous efficiency of the light module laser with the determined reference luminous efficiency.
4. The method of claim 3, wherein determining, from the obtained current temperature, a reference luminous efficiency corresponding to the obtained current temperature comprises:
and determining the reference luminous efficiency corresponding to the acquired current temperature by inquiring the stored corresponding table of the temperature of the optical module laser and the reference luminous efficiency according to the acquired current temperature.
5. The method of claim 4, wherein the correspondence table of the temperature of the light module laser and the reference luminous efficiency comprises a reference luminous efficiency corresponding to a plurality of predetermined temperature values, the method further comprising, for each of the plurality of predetermined temperature values:
determining a reference driving current corresponding to the preset temperature value according to the stored relation between the temperature of the optical module laser and the reference driving current;
determining a current threshold driving current corresponding to the acquired current temperature according to the stored relation between the temperature of the optical module laser and the threshold driving current;
determining a reference emitted optical power of the light module laser;
determining a reference luminous efficiency corresponding to the predetermined temperature value according to a reference driving current corresponding to the predetermined temperature value, a reference emitted light power and a threshold driving current;
and recording the preset temperature value and the corresponding reference luminous efficiency to generate and store a corresponding table of the temperature of the laser of the optical module and the reference luminous efficiency.
6. The method of claim 3, wherein determining the reference luminous efficiency corresponding to the acquired current temperature according to the acquired current temperature comprises:
determining a reference driving current corresponding to the acquired current temperature according to the stored relation between the temperature of the optical module laser and the reference driving current;
determining a current threshold driving current corresponding to the acquired current temperature according to the stored relation between the temperature of the optical module laser and the threshold driving current;
determining a reference emitted optical power of the light module laser;
determining a reference luminous efficiency corresponding to the acquired present temperature according to the reference driving current, the reference emitted luminous power and the threshold driving current.
7. The method of claim 6, further comprising:
respectively obtaining reference driving currents of at least two sample optical module lasers with the same specification at least two different temperature values in a factory state;
and determining the relation between the temperature of the laser of the optical module and the reference driving current according to the reference driving current of the laser of the sample optical module at different temperature values.
8. The method of claim 7, wherein determining the relationship of the temperature of the light module laser to a reference drive current from the reference drive current of the sample light module laser at different temperature values comprises:
determining the relation between the respective temperature of the sample optical module laser and the driving current according to the reference driving current of the sample optical module laser at different temperature values;
determining the relation between the primary term coefficient and the secondary term coefficient according to the primary term coefficient and the secondary term coefficient of the relation between the temperature and the driving current of the sample optical module laser;
acquiring reference driving currents of the optical module laser under at least two different temperature values;
and calculating a relation curve of the temperature and the driving current of the optical module according to the relation curve of the primary term coefficient and the secondary term coefficient and the reference driving current of the optical module laser at least two different temperature values.
9. The method of claim 1, wherein the comparing the current luminous efficiency of the light module laser with the reference luminous efficiency of the light module laser and determining the lifetime of the light module laser according to the comparison comprises:
judging whether the deviation of the current luminous efficiency and the reference luminous efficiency exceeds a preset limit or not;
determining that the light module laser reaches a lifetime limit if the deviation exceeds a predetermined limit.
10. An apparatus for monitoring the lifetime of a light module laser, the apparatus comprising:
the data acquisition unit is used for acquiring the current temperature, the current driving current and the current emitted light power of the laser of the optical module;
the efficiency determining unit is used for determining the current luminous efficiency of the laser of the optical module according to the acquired current temperature, the acquired current driving current and the acquired current emitted light power;
and the service life determining unit is used for comparing the current luminous efficiency of the optical module laser with the reference luminous efficiency of the optical module laser and determining the service life of the optical module laser according to the comparison result.
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| CN101599796A (en) * | 2008-06-06 | 2009-12-09 | 中兴通讯股份有限公司 | Laser life-span end of a period alarm producing method |
| CN107293938A (en) * | 2017-08-15 | 2017-10-24 | 中航海信光电技术有限公司 | Method and system for prolonging service life of laser for optical module |
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| CN107293938A (en) * | 2017-08-15 | 2017-10-24 | 中航海信光电技术有限公司 | Method and system for prolonging service life of laser for optical module |
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