CN107293938A - Method and system for prolonging service life of laser for optical module - Google Patents
Method and system for prolonging service life of laser for optical module Download PDFInfo
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- CN107293938A CN107293938A CN201710697652.9A CN201710697652A CN107293938A CN 107293938 A CN107293938 A CN 107293938A CN 201710697652 A CN201710697652 A CN 201710697652A CN 107293938 A CN107293938 A CN 107293938A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
- H01S5/068—Stabilisation of laser output parameters
- H01S5/06804—Stabilisation of laser output parameters by monitoring an external parameter, e.g. temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
- H01S5/068—Stabilisation of laser output parameters
- H01S5/06808—Stabilisation of laser output parameters by monitoring the electrical laser parameters, e.g. voltage or current
Abstract
The invention discloses a method and a system for prolonging the service life of a laser for an optical module, which are used for detecting the working temperature or the bias current of the laser and judging whether the working temperature is higher than the threshold temperature or whether the bias current is higher than the threshold bias current; if the working temperature is higher than the threshold temperature or the bias current is larger than the threshold bias current, whether the luminous efficiency of the laser is smaller than a set threshold is further judged, when the working temperature is larger than the set threshold, the stability of the luminous power of the laser is maintained by adopting the existing automatic optical power control method, when the working temperature is smaller than the set threshold and the laser works in a saturated working area, the laser works in a linear working area by controlling the mode of quickly reducing the luminous power of the laser, the damage of over-temperature and over-current to the laser is avoided, the stability of the luminous power of the laser is maintained by recovering the existing automatic optical power control method after the temperature is reduced, and the service life of the laser is effectively prolonged.
Description
Technical field
It is to be related to a kind of optical module with laser life-span to be extended specifically the invention belongs to technical field of optical fiber communication
Method and system.
Background technology
Optical module, which is accomplished that, converts electrical signals to optical signal transmission, and the optical signal of reception is converted into telecommunications
Number.Generally include to convert electrical signals to optical signal in optical module includes the emitting portion of laser drive circuit and laser,
And convert optical signals to the receiving portion including photo-detector and optical detection receiving circuit of electric signal；Wherein, laser
Voltage signal is converted to current signal by driver, and current signal is converted to optical signal by laser；And photo-detector believes light
Electric signal number is converted to, optical detection receiving circuit amplifies the electric signal of conversion.
The Output optical power of optical module needs to be maintained at the steady operation that optical module is just can guarantee that on certain power level,
Generally pass through the formation negative-feedback such as the photo-detector in laser assembly, optical power control circuit, laser driver, laser
Loop is realized, namely uses Automatic optical power control（APC）Method, when the Output optical power reduction of laser, photo-detector
When the photoelectric current of detection quickly reduces, increase the bias current of laser to increase the output of laser by laser driver
Power, on the contrary, then reduction bias current makes the luminous power of laser quickly reduce, so as to reach that automated power control is acted on, makes
The Output optical power for obtaining laser keeps stable.
APC control targe is to maintain the constant of laser luminous power, but it is only applicable to linear work area；Work as laser
Device is too high due to aging, or operating temperature（Environment temperature rise or overcurrent-overvoltage temperature rise etc.）When, luminous efficiency can be reduced, in order to maintain
Output optical power is constant, and optical power control circuit can be continuously increased bias current, on the one hand, laser traffic overload can be caused and
Damage is caused, on the other hand, after bias current, which is crossed, up to causes laser to leave linear work area into saturation region, it may appear that
Originally it was that the APC controls of negative-feedback are changed into the situation of positive feedback, namely Output optical power does not increase on the contrary during increase bias current
Decline, so as to cause laser output current drastically to decline the damage for causing laser；It can be seen that, in laser ageing or excess temperature shape
APC controls under state shorten the life-span of laser on the contrary.
Current solution is, or does not use APC, but such say can not ensure the stabilization of laser luminous power；
Or, maximum bias electric current restriction is carried out to laser, but because laser works state is influenced by temperature, single largest is inclined
Total temperature working range can not be applied to by putting the limitation of electric current, can not more be applied to the security control of laser total life cycle.
The content of the invention
Extend method and system with laser life-span this application provides a kind of optical module, can effectively extend laser
Working life.
To realize above-mentioned technique effect, the application is achieved using following technical scheme：
A kind of optical module laser life-span extension method is proposed, including：The operating temperature or bias current of detection laser；Sentence
Whether the operating temperature of breaking is more than threshold temperature, or, judges whether the bias current is more than threshold bias current；If so,
Judge whether the luminous efficiency of the laser is less than given threshold；If so, control quickly reduces the luminous work(of the laser
Rate, to cause the laser works in linear work area.
Further, if judging, the luminous efficiency of the laser is more than the given threshold, and methods described also includes：Adopt
The stabilization of the laser luminous power is maintained with auto light power control method.
Further, the luminous power of the laser is quickly reduced in control, methods described also includes：Detection laser
Current operating temperature；Judge whether the current operating temperature is less than the threshold temperature；If so, then using auto light power
Control method maintains the stabilization of the laser luminous power.
Further, before the operating temperature or bias current of detection laser, methods described also includes：The optical mode
On block after electricity, the output current of the laser is monitored；Based on the output current, determine the laser threshold current,
Luminous efficiency and linear work area；Bias current is adjusted to cause the luminous power of the laser to reach setting power；It is based on
Luminous efficiency, linear work area and the bias current of the laser determine the modulation electric current of the laser；Based on institute
Modulation electric current is stated to determine the extinction ratio of the laser for setting extinction ratio and store.
Further, after control quickly reduces the luminous power of the laser, methods described also includes：Adjustment is adjusted
Electric current processed, to cause the extinction ratio of the laser to reach the setting extinction ratio.
Propose a kind of optical module laser life-span extension system, including performance detection module, performance judging module, laser
Device luminous efficiency judge module and laser luminous power control module；The performance detection module, for detection laser
Operating temperature or bias current；The performance judging module, for judging whether the operating temperature is more than threshold temperature, or,
Judge whether the bias current is more than threshold bias current；If so, the laser luminous efficiency judge module, for judging
Whether the luminous efficiency of the laser is less than given threshold；If so, the laser luminous power control module, for controlling
Quickly reduce the luminous power of the laser, to cause the laser works in linear work area.
Further, the system also includes APC module；The APC module, if sentencing for the laser luminous efficiency
Disconnected module judges that the luminous efficiency of the laser is more than the given threshold, then maintains institute using auto light power control method
State the stabilization of laser luminous power.
Further, the performance detection module, is additionally operable to quick in laser luminous power control module control
After the luminous power for reducing the laser, the current operating temperature of the laser is detected；The performance judging module, also
For judging whether the current operating temperature is less than the threshold temperature, if so, then the APC module uses auto light power
Control method maintains the stabilization of the laser luminous power.
Further, the system also include laser output current monitoring modular, laser operating parameters determining module,
Set extinction ratio determining module and memory module；The laser output current monitoring modular, for electric on the optical module
Afterwards, the output current of the laser is monitored；The laser operating parameters determining module, for based on the output current,
Determine threshold current, luminous efficiency and the linear work area of the laser；The setting extinction ratio determining module, for adjusting
Bias current is to cause the luminous power of the laser to reach setting power, and the luminous efficiency based on the laser, line
Sex work area and the bias current determine the modulation electric current of the laser, and the laser is determined based on the modulation electric current
Extinction ratio for setting extinction ratio；The memory module, for storing the threshold current, the luminous efficiency, described linear
Workspace, the bias current and the setting extinction ratio.
Further, the system also includes extinction ratio adjusting module；The extinction ratio adjusting module, for swashing described
The control of light device luminous power control module adjusts modulation electric current after quickly reducing the luminous power of the laser, to cause
The extinction ratio for stating laser reaches the setting extinction ratio.
Compared with prior art, the advantage and good effect of the application is：The optical module that the application is proposed uses the laser longevity
In life extension method and system, at the electric initial stage on optical module, it is primarily based on output current and determines the threshold current of laser, lights
The running parameter such as efficiency and linear work area, and bias current is adjusted so that the luminous power of laser reaches setting power, from
And modulation electric current is determined, the level"1" correspondence luminous power and level "0" correspondence light work(of laser are determined according to modulation electric current
Rate, so that it is determined that a setting extinction ratio, and the parameter progress storage of above-mentioned determination is used.In the optical module course of work,
The operating temperature or bias current of detection laser, exceed threshold temperature in operating temperature or bias current are more than threshold bias
During electric current, determine whether whether luminous efficiency is less than given threshold, be more than given threshold in luminous power, namely in linear
During workspace, maintain the luminous power of laser stable using conventional APC, and when luminous efficiency is less than given threshold, namely
Laser enters behind saturation workspace from linear work area, and control is quick to reduce luminous power so that laser works are linear
Workspace, and according to the modulation electric current of current luminous efficiency adjustment laser so that the extinction ratio of laser reaches setting delustring
Than, so that laser is after the too high or aging due to operating temperature, quickly reduce luminous power automatically to suitable numerical value,
Ensureing laser normal work simultaneously, reduction excess temperature forms a certain degree of guarantor to laser to the degree of injury of laser
Shield, recovers the stabilization that APC maintains luminous power, effectively extends the working life of laser again after operating temperature reduction.
And in the life method, employ on optical module threshold value electric current, luminous efficiency, linear work after electricity
The mode of the running parameters such as area, bias current, compared to unified maximum with laser setup to all optical modules in the prior art
The mode of bias current, the method that the application is proposed can be carried out suitable for laser itself for the individual difference of laser
Parameter adjustment, so that the working condition of laser can be optimal, service life is optimal,
After the detailed description that the application embodiment is read in conjunction with the figure, other features and advantage of the application will become more clear
Chu.
Brief description of the drawings
Fig. 1 is the flow chart that the optical module laser life-span that the application is proposed extends method；
Fig. 2 is the system block diagram that the optical module laser life-span that the application is proposed extends system；
Fig. 3 is laser works characteristic curve（P-I）Schematic diagram；
Fig. 4 is laser maximum saturation luminous power schematic diagram.
Embodiment
The embodiment to the application is described in more detail below in conjunction with the accompanying drawings.
The application proposes that a kind of optical module extends method with laser life-span, can ensure laser normal operating conditions
The service life of lower extension laser, specifically, as shown in figure 1, comprising the following steps：
Step S11：On optical module after electricity, the output current of laser is monitored.
On optical module after electricity, the monitoring to laser output current is realized by the monitoring to photo-detector feedback current.
Step S12：Based on output current, threshold current, luminous efficiency and the linear work area of laser are determined.
Laser works characteristic curve with reference to shown in Fig. 3（P-I）Schematic diagram understands that the threshold current Ith of laser is
Laser is transformed into forward current value when being stimulated radiation regimes by spontaneous radiation, and energy is dramatically increased according to output current I
Enough determine the threshold current of laser.Wherein, P0 is level "0" correspondence luminous power, and P1 is level"1" correspondence luminous power.
The luminous power of laser is resulted in by the power output detection to photo-detector, according to output current and hair
Luminous power can determine the luminous efficiency of laser, as shown in figure bend, and luminous efficiency is with the liter of laser. operating temperature
High or aging and reduce, namely slope quickly reduces.
With reference to shown in Fig. 4, the working condition of laser is divided into spontaneous emission area, be stimulated linear work area and saturation work
Area, when the bias current Ibias applied to laser is less than threshold current Ith, laser works in spontaneous emission area, by
Linear work area is excited, luminous power can increase with bias current Ibias increase, in saturation workspace, luminous power
Can quickly it reduce with bigoted electric current Ibias increase.Ps in the maximum luminous power that can be output according to laser, such as figure,
The separation of linear work area and saturation workspace is can determine, so that it is determined that linear work area and saturation workspace, can also
The change for changing from positive to negative value according to luminous efficiency determines the separation of linear work area and saturation workspace, so that it is determined that line
Sex work area and saturation workspace.
Step S13：Bias current is adjusted to cause the luminous power of laser to reach setting power.
After the parameters such as threshold current, linear work area, the luminous efficiency of laser are determined, the biasing of laser is adjusted
Electric current Ibias so that the luminous power of laser reaches setting power, this sets power as a value for presetting storage.
Step S14：Luminous efficiency based on laser, linear work area and bias current determine the modulation electricity of laser
Stream.Step S15：The extinction ratio of laser is determined for setting extinction ratio based on modulation electric current and stored.
As shown in figure 3, the parameter such as luminous efficiency, linear work area and bias current with reference to laser, can determine use
In the modulation electric current Imod of laser, namely level"1" correspondence luminous power P1 luminous powers corresponding with level "0" can be extrapolated
P0, so that the numerical value of the extinction ratio of light eye pattern is normal, and determines that the extinction ratio is the setting extinction ratio to laser setup.
The parameters such as the threshold current of above-mentioned determination, linear work area, luminous efficiency, setting extinction ratio are stored, made
Parameter for the life method for the laser is used.
Step S16：The operating temperature or bias current of detection laser.
In the course of work of optical module, according to setpoint frequency or other imposing a condition of setting according to the actual requirements,
The operating temperature or bias current of detection laser.
Step S17：Judge whether operating temperature is more than threshold temperature, or, judge whether bias current is more than threshold bias
Electric current.If so,
Step S18：Judge whether the luminous efficiency of laser is less than given threshold.
When environment temperature is too high causes laser. operating temperature too high, or because over-pressed or excessively stream causes laser works
When temperature is too high, or due to when aging causes laser. operating temperature too high, can all aggravate the load of laser, laser is made
Into damage；Enter if too high operating temperature is due to laser caused by saturation workspace, rapidly increased bias current
Laser can be caused to damage, therefore, when the operating temperature of laser is too high, or bias current it is excessive when, be required for laser
The luminous efficiency of device does further detection；If luminous efficiency is more than zero or close to zero, laser also operates at linear work
Area, then can continue to maintain the luminous power of laser stable using auto light power control method, if but luminous efficiency be less than
When zero, laser is in saturation workspace, then increases with the continuation of bias current, luminous power quickly reduces on the contrary,
If now also maintaining the luminous power of laser based on auto light power control method, laser output current can be caused drastically
Decline and ultimately cause the damage of laser.
Therefore, used in the application when operating temperature is higher than threshold temperature, or bias current is more than threshold bias electricity
During stream, the mode of the luminous efficiency of further detection laser, the working condition to laser judges, if luminous efficiency is big
In given threshold, then illustrate that laser also operates at linear work area, if luminous efficiency is less than given threshold, illustrate laser
Through entering saturation workspace.
Step S19：The quick luminous power for reducing laser of control, to cause laser works in linear work area.
In laser close to saturation workspace or after coming into saturation workspace, the application reduces using control is quick
Luminous power namely quickly reduces bias current to the mode for setting power, laser is reworked in linear work area,
So that the operating temperature of laser lowers gradually, the purpose now controlled is not configured to safeguard the perseverance of the luminous power of laser
It is fixed, but on the premise of not excess temperature, by way of adjusting bias current and monitoring luminous power, it is ensured that laser is only
Luminous power in the case of temperature is maximum, so that ensure that laser is not in that bias current continues to increase and luminous power reduction,
The situation for causing output current drastically to decline and ultimately cause the damage of laser occurs, so as to ensure effective fortune of laser
OK, the service life of laser is extended.
Step S20:Adjustment modulation electric current, to cause the extinction ratio of laser to reach setting extinction ratio.
Laser is reworked after linear work area, and based on present bias current and current luminous efficiency, adjustment is adjusted
Electric current processed so that the extinction ratio of laser reaches the setting extinction ratio that abovementioned steps S15 is determined, that is, bent according to luminous efficiency
The average luminescence power and level"1" and the corresponding luminous power of level "0" of line adjust automatically laser, make light eye pattern normal, protect
Demonstrate,prove the normal work of communication system.
Step S21：The current operating temperature of detection laser.
The luminous power of laser is being reduced so that laser is reworked after linear work area, the temperature of laser
Degree declines with the reduction of bias current, now continues the current operating temperature of detection laser, step S22：Judge current
Whether operating temperature is less than threshold temperature.
With the decline of operating temperature, current operating temperature is being judged after less than threshold temperature, step S23：Using
Auto light power control method maintains the stabilization of laser luminous power.
When laser is reworked and dropped in threshold temperature range in linear work area and operating temperature, recover to use
APC maintains the stable control mode of laser luminous power, and returns to execution step S11.
By optical module set forth above with laser life-span extend method, laser due to operating temperature it is too high or old
After change, it can quickly reduce luminous power automatically to suitable numerical value, ensure laser normal work simultaneously, reduction excess temperature is to swashing
The degree of injury of light device, forms a certain degree of protection to laser, recovers APC again after operating temperature reduction and maintains luminous work(
The stabilization of rate, effectively extends the working life of laser.
Method is extended with laser life-span based on optical module set forth above, the application also proposes a kind of optical module laser
Device life system, as shown in Fig. 2 the system includes the luminous effect of performance detection module 21, performance judging module 22, laser
Rate judge module 23 and laser luminous power control module 24；Performance detection module 21 is used for the work temperature of detection laser 20
Degree or bias current；Performance judging module 22 is used to judge that whether operating temperature is more than threshold temperature, or, judge that bias current is
It is no to be more than threshold bias current；If so, laser luminous efficiency judge module 23 be used for judge laser luminous efficiency whether
Less than given threshold；If so, laser luminous power control module 24 is used to control the quick luminous power for reducing laser, with
So that laser works are in linear work area.
Optical module laser life-span, which extends system, also includes APC module 25, if judging for laser luminous efficiency
Module 23 judges that the luminous efficiency of laser is more than given threshold, then maintains laser 20 to send out using auto light power control method
The stabilization of luminous power.
Above-mentioned, performance detection module 21 is additionally operable to control quick reduction laser in laser luminous power control module
After luminous power, the current operating temperature of detection laser；Performance judging module 22 is additionally operable to judge that current operating temperature is
It is no to be less than threshold temperature, if so, then APC module 25 maintains the steady of laser luminous power using auto light power control method
It is fixed.
Optical module laser life-span, which extends system, also includes laser output current monitoring modular 26, laser works
Parameter determination module 27, setting extinction ratio determining module 28 and memory module 29；Laser output current monitoring modular 26 is used for
On optical module after electricity, the output current of laser 20 is monitored；Laser operating parameters determining module 27 is used for based on output electricity
Stream, determines threshold current, luminous efficiency and the linear work area of laser；Setting extinction ratio determining module 28 is used to adjust biasing
Electric current is to cause the luminous power of laser to reach setting power, and the luminous efficiency based on laser, linear work area and partially
The modulation electric current that electric current determines laser is put, determines that the extinction ratio of laser is setting extinction ratio based on modulation electric current；Store mould
Block 29 is used to store threshold current, luminous efficiency, linear work area, bias current and setting extinction ratio.
Optical module laser life-span, which extends system, also includes extinction ratio adjusting module 30, in the luminous work(of laser
Rate control module 24 controls adjustment modulation electric current after the quick luminous power for reducing laser, to cause the extinction ratio of laser
Reach setting extinction ratio.
Specific optical module extends the method for work of system with laser life-span, in above-mentioned optical module laser
It is described in detail in life method, it will not go into details herein.
The optical module that above-mentioned the application is proposed laser life-span extends method and system, too high in laser. operating temperature
Or bias current it is excessive when, detection luminous efficiency whether be less than given threshold, laser enter saturation workspace when, by fast
The mode that speed reduces luminous power causes laser to come back to the work of linear work area, it is to avoid damage of the excess temperature to laser,
The life-span of laser is effectively extended, recovers to maintain laser using existing auto light power control method after temperature reduction
The stabilization of device luminous power.This life method implemented to laser, has abandoned and has only carried out APC in linear work area in the past
The working method of control, overcomes the limitation constrained laser overall performance that APC controls are present, has excavated laser
Potential, the working life effectively extended.
And in the method for the application proposition, the threshold current of laser, linear work area, luminous efficiency, setting extinction ratio
Laser setting themselves are all based on etc. important running parameter, it is adaptable to the individual difference of laser, swash compared to existing
Light device sets unified maximum bias electric current to avoid the mode that laser is damaged, and enables to laser to be adjusted according to own characteristic
Optimal working condition so that service life is optimal.
It should be noted that described above is not limitation of the present invention, the present invention is also not limited to the example above,
The variations, modifications, additions or substitutions that those skilled in the art are made in the essential scope of the present invention, also should
Belong to protection scope of the present invention.
Claims (10)
1. optical module extends method with laser life-span, it is characterised in that including：
The operating temperature or bias current of detection laser；
Judge whether the operating temperature is more than threshold temperature, or, judge whether the bias current is more than threshold bias current；
If so,
Judge whether the luminous efficiency of the laser is less than given threshold；If so,
Control quickly reduces the luminous power of the laser, to cause the laser works in linear work area.
2. optical module according to claim 1 extends method with laser life-span, it is characterised in that if judging the laser
The luminous efficiency of device is more than the given threshold, and methods described also includes：
The stabilization of the laser luminous power is maintained using auto light power control method.
3. optical module according to claim 1 extends method with laser life-span, it is characterised in that in the quick reduction of control
The luminous power of the laser, methods described also includes：
The current operating temperature of detection laser；
Judge whether the current operating temperature is less than the threshold temperature；
If so, then maintaining the stabilization of the laser luminous power using auto light power control method.
4. optical module according to claim 1 extends method with laser life-span, it is characterised in that in detection laser
Before operating temperature or bias current, methods described also includes：
On the optical module after electricity, the output current of the laser is monitored；
Based on the output current, threshold current, luminous efficiency and the linear work area of the laser are determined；
Bias current is adjusted to cause the luminous power of the laser to reach setting power；
Luminous efficiency based on the laser, linear work area and the bias current determine the modulation electricity of the laser
Stream；
The extinction ratio of the laser is determined for setting extinction ratio based on the modulation electric current and stored.
5. optical module according to claim 4 extends method with laser life-span, it is characterised in that in the quick reduction of control
After the luminous power of the laser, methods described also includes：
Adjustment modulation electric current, to cause the extinction ratio of the laser to reach the setting extinction ratio.
6. optical module extends system with laser life-span, it is characterised in that including performance detection module, performance judging module, swash
Light device luminous efficiency judge module and laser luminous power control module；
The performance detection module, operating temperature or bias current for detection laser；
The performance judging module, for judging that whether the operating temperature is more than threshold temperature, or, judge the bias current
Whether threshold bias current is more than；If so,
The laser luminous efficiency judge module, for judging whether the luminous efficiency of the laser is less than given threshold；
If so,
The laser luminous power control module, the luminous power for controlling quickly to reduce the laser, to cause
Laser works are stated in linear work area.
7. optical module according to claim 6 extends system with laser life-span, it is characterised in that the system also includes
APC module；
The APC module, if judging that the luminous efficiency of the laser is more than for the laser luminous efficiency judge module
The given threshold, then maintain the stabilization of the laser luminous power using auto light power control method.
8. optical module according to claim 7 extends system with laser life-span, it is characterised in that the performance detection mould
Block, is additionally operable to after laser luminous power control module control quickly reduces the luminous power of the laser, inspection
Survey the current operating temperature of the laser；
The performance judging module, is additionally operable to judge whether the current operating temperature is less than the threshold temperature, if so, then institute
State the stabilization that APC module maintains the laser luminous power using auto light power control method.
9. optical module according to claim 6 extends system with laser life-span, it is characterised in that the system also includes
Laser output current monitoring modular, laser operating parameters determining module, setting extinction ratio determining module and memory module；
The laser output current monitoring modular, after the electricity on the optical module, monitors the output electricity of the laser
Stream；
The laser operating parameters determining module, for based on the output current, determine the laser threshold current,
Luminous efficiency and linear work area；
The setting extinction ratio determining module, for adjusting bias current with so that the luminous power of the laser reaches setting
Power, and the luminous efficiency based on the laser, linear work area and the bias current determine the modulation of the laser
Electric current, determines that the extinction ratio of the laser is setting extinction ratio based on the modulation electric current；
The memory module, for storing the threshold current, the luminous efficiency, the linear work area, the biased electrical
Stream and the setting extinction ratio.
10. optical module according to claim 9 extends system with laser life-span, it is characterised in that the system is also wrapped
Include extinction ratio adjusting module；
The extinction ratio adjusting module, for quickly reducing the laser in laser luminous power control module control
Luminous power after adjustment modulation electric current, to cause the extinction ratio of the laser to reach the setting extinction ratio.
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| CN201710697652.9A CN107293938B (en) | 2017-08-15 | 2017-08-15 | Method and system for prolonging service life of laser for optical module |
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| 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 |
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Address after: 266100 Songling Road, Laoshan District, Qingdao, Shandong Province, No. 399 Patentee after: Qingdao Xinghang Photoelectric Technology Co.,Ltd. Address before: 266104 in the investment service center of Beizhai sub district office, beizhaike community, Laoshan District, Qingdao City, Shandong Province Patentee before: HISENSE & JONHON OPTICAL-ELECTRICAL TECHNOLOGIES Co.,Ltd. |