CN101599796A - Laser life-span end of a period alarm producing method - Google Patents
Laser life-span end of a period alarm producing method Download PDFInfo
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- CN101599796A CN101599796A CN 200810067642 CN200810067642A CN101599796A CN 101599796 A CN101599796 A CN 101599796A CN 200810067642 CN200810067642 CN 200810067642 CN 200810067642 A CN200810067642 A CN 200810067642A CN 101599796 A CN101599796 A CN 101599796A
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Abstract
The semiconductor laser life-span end of a period alarm producing method that the present invention relates to use in the optical module, in this method, the microprocessor of optical module inside is gathered and current bias current and the optical module current output power of storage laser in real time; The bias current when life-span that veneer reads the prior typing of laser respectively begins and average optical output power and the current bias current of laser and the optical module present output power of optical module, and these two groups of data of comparison, when the current bias current of laser equals it and begins if the optical module present output power does not have marked change 1.5 times of bias current, then produce laser life-span end of a period alarm signal and report webmaster.The present invention is simple and practical, and do not need to increase any hardware circuit and just can solve the problem that existing optical transmission system is not considered laser life-span end of a period alarm, be a kind of effective ways that can at all solve laser life-span end of a period alarm.
Description
Technical field
The present invention relates to optical communication field, relate in particular to the semiconductor laser life-span end of a period alarm producing method that uses in the optical module.
Background technology
Semiconductor laser causes the laser output performance to descend because aging phenomenon in various degree can appear in the transition of operating time and the variation of operating ambient temperature, the Output optical power decay, even lost efficacy, Here it is, and so-called laser life-span is ended.The unexpected end of a period in laser useful life not only can cause communication link failure to cause that work incurs loss through delay, and works on and can cause other device failure, brings unnecessary economic loss.The useful life that it is conventionally believed that semiconductor laser in the past is greater than more than 100,000 hours, the field of telecommunications new technology substitutes makes rapid progress, but pay attention to not enough to the semiconductor laser problem of using in the optical transmission system in useful life, the optical transmission system that discovered in recent years was disposed before 10 years is still using, thereby be necessary in optical transmission system, to consider laser life-span end of a period alarm function, so that timely and effective replacing optical module before laser life-span is ended, the economic loss of avoiding so bringing.
As shown in Figure 1, provided the P-I curve of traditional semiconductor laser, when laser life-span begins (BOL), under certain temperature condition, the corresponding certain luminous power output of the bias current of laser.This curved line relation shows rising or the laser ageing of laser along with operating ambient temperature, the variation that its P-I curve takes place, if expect luminous power with original identical output, then must increase laser bias current, when laser bias current is increased to certain value, the output average light power of optical module changes no longer significantly, this figure also shows, if expect and original identical extinction ratio modulated light signal, the amplitude of drive signal also will raise along with the aging or temperature of laser and increase.
As shown in Figure 2, be general auto light power control system circuit block diagram, this is a typical feedback loop system.When optical module normally worked on power, the laser bias current supply circuit provided laser bias current, guaranteed to reach when laser life-span begins the bias current value of setting.Photo-detector in the laser assembly can linear monitor the photoelectric current that the reflection Output optical power changes, offer the laser bias current supplying electric current by the laser bias current feedback circuit, when Output optical power increases, feedback loop reduces laser bias current, when Output optical power reduces, feedback loop increases laser bias current, totally makes the laser Output optical power keep constant substantially.When laser closes on the life-span at the end, electro-optical efficiency reduces as can be seen from Figure 1, must increase bias current significantly, and is stable to keep Output optical power.
General semiconductor laser biasing circuit is an automatic optical power control circuit in the optical module design, when being operate as normal, detect the average optical output power of laser by the photo eye in the laser assembly (PD), negative feedback controls the laser bias current size then, to guarantee the stable of Output optical power, as shown in Figure 2.But when laser causes Output optical power to descend owing to long-term work is aging, can bring abominable consequence if adopt the increasing bias current to stablize Output optical power again, if restriction electric current improper measures, then can cause semiconductor laser to damage or the damage of drive circuit because of bias current is excessive, cause great economic loss, or cisco unity malfunction behind the semiconductor laser ageing, it is not only very necessary that therefore the end of a period alarm of semiconductor laser life-span is set, and the risk predicted that can evade optical transmission chain, reduce economic loss, be of great importance.
The patent No. is that the United States Patent (USP) of US2006/0159491 has proposed the method that a kind of optical module laser life-span alarm produces, this method has proposed in optical module inside memory to be set, the various parameter typings that will need during production, comprise some analog quantitys and digital quantity, then all information is handled, comprise the conversion of analog quantity and digital quantity, form the end performance of alarm of optical module life-span that veneer can discern at last and report, specifically as shown in Figure 3.This method just generally illustrates the implementation method that the alarm of optical module life-span ends, but implement very big difficulty, it is very difficult at first to collect the parameter relevant with the optical module life-span, comprise the optical module operating ambient temperature, laser drive current and other parameter relevant with optical device, this patent does not specifically provide, and how to become laser life-span end of a period alarm very fuzzy the information translation of collecting in addition yet, does not therefore possess exploitativeness.
Summary of the invention
Technical problem to be solved by this invention is, enforceable laser life-span end of a period alarm producing method is provided, at the end in time alarm problem with laser life-span in the solution optical transmission system, avoided laser to end and to be changed timely and effectively because of the life-span, cause optical transmission chain to interrupt, thereby cause economic loss.
A kind of laser life-span end of a period alarm producing method may further comprise the steps:
Step 1: the microprocessor of optical module inside is gathered and current bias current and the optical module current output power of storage laser in real time;
Step 2: the bias current the when life-span that veneer reads the prior typing of laser respectively begins and average optical output power and the current bias current of laser and the optical module present output power of optical module, and these two groups of data of comparison, when the current bias current of laser equals it and begins if the optical module present output power does not have marked change 1.5 times of bias current, then produce laser life-span end of a period alarm signal and report webmaster; Otherwise this step is carried out in circulation.
Bias current when described laser life-span begins and the average optical output power of optical module are stored in the Nonvolatile memery unit of optical module.
Bias current that described laser is current and optical module current output power are stored in the memory cell of optical module.
Bias current when described veneer reads laser life-span and begins by the IIC interface and average optical output power and the current bias current of laser and the optical module present output power of optical module.
A kind of laser life-span end of a period alarm producing method may further comprise the steps:
Step a: the microprocessor of optical module inside is gathered and current bias current and the optical module current output power of storage laser in real time;
Step b: the bias current the when life-span that microprocessor reads the prior typing of laser respectively begins and average optical output power and the current bias current of laser and the optical module present output power of optical module, and these two groups of data of comparison, 1.5 times of bias current when the current bias current of laser equals it and begins if the optical module present output power does not have marked change, then produce laser life-span end of a period alarm signal and report veneer, report webmaster by veneer again; Otherwise this step is carried out in circulation.
Bias current when described laser life-span begins and the average optical output power of optical module are stored in the Nonvolatile memery unit of optical module.
Bias current that described laser is current and optical module current output power are stored in the memory cell of optical module.
Described microprocessor reports veneer by the IIC interface with the laser life-span alarm signal that ends.
Compared with prior art, the present invention is simple and practical, not needing to increase any hardware circuit, and can solve the problem that existing optical transmission system is not considered laser life-span end of a period alarm by the mode of software upgrading, is a kind of effective ways that can at all solve laser life-span end of a period alarm.
Description of drawings
Fig. 1 is the P-I curve synoptic diagram of laser;
Fig. 2 is general auto light power control system circuit block diagram;
Fig. 3 is that the patent No. is the flow chart of the described method of US2006/0159491;
Fig. 4 is the inner theory diagram of existing optical module;
Fig. 5 is the method for the invention flow chart.
Embodiment
Below in conjunction with accompanying drawing the present invention is done and to describe in further detail.
As shown in Figure 4, it is the inner theory diagram of existing optical module that the present invention relates to, optical module 401 inside comprise microprocessor unit 4010, Nonvolatile memery unit 4011 and memory cell 4014, Optical Transmit Unit and peripheral control circuit 4012 thereof, light receiving unit and peripheral control circuit 4013 thereof, microprocessor unit 4010 has the IIC interface, can with the veneer real-time communication, the significant data of optical module 401 is stored in the Nonvolatile memery unit 4011, other data then are stored in the memory cell 4014, and after the optical module operate as normal, the current corresponding data that microprocessor unit 4010 is gathered just is stored in the memory cell 4014.
The present invention utilizes the definition of common laser end of a period in useful life: laser is when constant current driven, its power 30% time corresponding that descends, or during laser constant output luminous power, the laser bias current 1.5 times of time corresponding that raise are promptly thought the time that laser life-span is ended.The criterion that the present invention adopts the latter to end as laser life-span judges by the bias current of real-time monitoring laser and the Output optical power of optical module laser whether alarm by the life-span end of a period.
As shown in Figure 5, be the method for the invention flow chart.Concrete steps are as follows:
Step 501: during the bias current when during production laser life-span being begun and the average optical output power of optical module are stored in the Nonvolatile memery unit 4011 of optical module 401;
Step 502: after optical module powered on, its inner microprocessor was gathered and current bias current and the optical module current output power of storage laser in real time;
Microprocessor with the storage that collects in the memory cell 4011 of optical module 401;
Step 503: the bias current when veneer reads laser life-span respectively and begins by the IIC interface and average optical output power and the current bias current of laser and the optical module present output power of optical module;
Step 504: veneer is these two groups of data relatively, and when the current bias current of laser equals it and begins if the optical module present output power does not have marked change 1.5 times of bias current, then execution in step 505; Otherwise this step is carried out in circulation;
Step 505: veneer produces laser life-span end of a period alarm signal and reports the upper strata webmaster.
After the upper strata webmaster received this alarm signal, the attendant just can take safety measures, and changed optical module.
Among the present invention, optical module itself also can be read the laser bias current and the Output optical power of two different memory areas by microprocessor respectively, relatively calculate then, obtain the laser the information whether life-span ends, report veneer by the IIC interface then, report webmaster to confirm that concrete steps are as follows by veneer:
Step 501 ': during the bias current when during production laser life-span being begun and the average optical output power of optical module are stored in the Nonvolatile memery unit 4011 of optical module 401;
Step 502 ': after optical module powered on, its inner microprocessor was gathered and current bias current and the optical module current output power of storage laser in real time;
Microprocessor with the storage that collects in the memory cell 4011 of optical module 401;
Step 503 ': the bias current that microprocessor reads laser life-span respectively when beginning and average optical output power and the current bias current of laser and the optical module present output power of optical module;
Step 504 ': microprocessor is these two groups of data relatively, and when the current bias current of laser equals it and begins if the optical module present output power does not have marked change 1.5 times of bias current, then execution in step 505; Otherwise this step is carried out in circulation;
Step 505 ': microprocessor produces laser life-span end of a period alarm signal and reports veneer by the IIC interface, and veneer reports the upper strata webmaster again.
Claims (8)
1, a kind of laser life-span end of a period alarm producing method is characterized in that, may further comprise the steps:
Step 1: the microprocessor of optical module inside is gathered and current bias current and the optical module current output power of storage laser in real time;
Step 2: the bias current the when life-span that veneer reads the prior typing of laser respectively begins and average optical output power and the current bias current of laser and the optical module present output power of optical module, and these two groups of data of comparison, when the current bias current of laser equals it and begins if the optical module present output power does not have marked change 1.5 times of bias current, then produce laser life-span end of a period alarm signal and report webmaster; Otherwise this step is carried out in circulation.
2, laser life-span end of a period alarm producing method as claimed in claim 1 is characterized in that, the bias current when described laser life-span begins and the average optical output power of optical module are stored in the Nonvolatile memery unit of optical module.
3, laser life-span end of a period alarm producing method as claimed in claim 1 is characterized in that, bias current that described laser is current and optical module current output power are stored in the memory cell of optical module.
4, laser life-span end of a period alarm producing method as claimed in claim 1, it is characterized in that the bias current when described veneer reads laser life-span and begins by the IIC interface and average optical output power and the current bias current of laser and the optical module present output power of optical module.
5, a kind of laser life-span end of a period alarm producing method is characterized in that, may further comprise the steps:
Step a: the microprocessor of optical module inside is gathered and current bias current and the optical module current output power of storage laser in real time;
Step b: the bias current the when life-span that microprocessor reads the prior typing of laser respectively begins and average optical output power and the current bias current of laser and the optical module present output power of optical module, and these two groups of data of comparison, 1.5 times of bias current when the current bias current of laser equals it and begins if the optical module present output power does not have marked change, then produce laser life-span end of a period alarm signal and report veneer, report webmaster by veneer again; Otherwise this step is carried out in circulation.
6, laser life-span end of a period alarm producing method as claimed in claim 5 is characterized in that, the bias current when described laser life-span begins and the average optical output power of optical module are stored in the Nonvolatile memery unit of optical module.
7, laser life-span end of a period alarm producing method as claimed in claim 5 is characterized in that, bias current that described laser is current and optical module current output power are stored in the memory cell of optical module.
8, laser life-span end of a period alarm producing method as claimed in claim 5 is characterized in that, described microprocessor reports veneer by the IIC interface with the laser life-span alarm signal that ends.
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| CN 200810067642 CN101599796A (en) | 2008-06-06 | 2008-06-06 | Laser life-span end of a period alarm producing method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323505A (en) * | 2011-08-16 | 2012-01-18 | 成都新易盛通信技术有限公司 | Device and method for supporting life prediction and failure cause analysis of optical device |
| CN103152095A (en) * | 2013-01-29 | 2013-06-12 | 华为技术有限公司 | Life forecast method and life forecast device of optical module |
| CN109004977A (en) * | 2018-08-17 | 2018-12-14 | 青岛海信宽带多媒体技术有限公司 | A kind of method and device judging optical module stability based on real time data |
| CN109100706A (en) * | 2018-06-08 | 2018-12-28 | 远景能源（江苏）有限公司 | A kind of laser radar critical component life controls systems and method |
| CN109802724A (en) * | 2018-12-18 | 2019-05-24 | 青岛海信宽带多媒体技术有限公司 | Monitor the method, apparatus of optical module laser life-span |
| CN114374431A (en) * | 2022-01-18 | 2022-04-19 | 武汉联特科技股份有限公司 | Intelligent operation and maintenance system applied to optical module |
-
2008
- 2008-06-06 CN CN 200810067642 patent/CN101599796A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323505A (en) * | 2011-08-16 | 2012-01-18 | 成都新易盛通信技术有限公司 | Device and method for supporting life prediction and failure cause analysis of optical device |
| CN103152095A (en) * | 2013-01-29 | 2013-06-12 | 华为技术有限公司 | Life forecast method and life forecast device of optical module |
| CN103152095B (en) * | 2013-01-29 | 2015-11-25 | 华为技术有限公司 | A kind of optical module life-span prediction method and device |
| CN109100706A (en) * | 2018-06-08 | 2018-12-28 | 远景能源（江苏）有限公司 | A kind of laser radar critical component life controls systems and method |
| CN109100706B (en) * | 2018-06-08 | 2020-09-15 | 远景能源（江苏）有限公司 | Laser radar key part service life control system and method |
| CN109004977A (en) * | 2018-08-17 | 2018-12-14 | 青岛海信宽带多媒体技术有限公司 | A kind of method and device judging optical module stability based on real time data |
| CN109004977B (en) * | 2018-08-17 | 2021-06-11 | 青岛海信宽带多媒体技术有限公司 | Method and device for judging stability of optical module based on real-time data |
| CN109802724A (en) * | 2018-12-18 | 2019-05-24 | 青岛海信宽带多媒体技术有限公司 | Monitor the method, apparatus of optical module laser life-span |
| CN109802724B (en) * | 2018-12-18 | 2021-10-22 | 青岛海信宽带多媒体技术有限公司 | Method and device for monitoring service life of laser of optical module |
| CN114374431A (en) * | 2022-01-18 | 2022-04-19 | 武汉联特科技股份有限公司 | Intelligent operation and maintenance system applied to optical module |
| CN114374431B (en) * | 2022-01-18 | 2024-04-26 | 武汉联特科技股份有限公司 | Intelligent operation and maintenance system applied to optical module |
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Application publication date: 20091209 |