CN106155688A - A kind of linear deflection algorithm with lower limit being applicable to optical module production - Google Patents
A kind of linear deflection algorithm with lower limit being applicable to optical module production Download PDFInfo
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- CN106155688A CN106155688A CN201610519092.3A CN201610519092A CN106155688A CN 106155688 A CN106155688 A CN 106155688A CN 201610519092 A CN201610519092 A CN 201610519092A CN 106155688 A CN106155688 A CN 106155688A
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- imod
- value
- dac
- current temperatures
- optical module
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
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- Engineering & Computer Science (AREA)
- Software Systems (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The present invention discloses and a kind of is applicable to the linear deflection algorithm with lower limit that optical module produces, solve actual production utilizes chip two close cycles characteristic carry out total according in the skew of IMOD form time avoid the occurrence of skew after the IMOD current offset values that occurs when low temperature is the least or situation close to 0.Can avoid when utilizing chip two close cycles characteristic to obtain single closed loop IMOD compensating curve, due to Current Temperatures point IMOD DAC value bigger time, make the curve offset out without lower limit control, when causing single closed loop, there is the situation that IMOD current value is the least or abnormal when low temperature in IMOD current compensation, it is effectively prevented and utilizes the module eye pattern at low temperatures of the single closed loop IMOD compensation table of two close cycles characteristic making close to closedown, affect the use of optical module.
Description
Technical field
The present invention relates to a kind of linear deflection algorithm with lower limit being applicable to optical module production.
Background technology
In taking the optical module utilizing two close cycles characteristic to obtain single closed loop mode IMOD current compensation table to produce, it is right to need
IMOD current compensation table carries out burning, so needing total under two close cycles pattern is offset according to IMOD compensating curve,
IMOD current compensation curve under single closed loop mode.
Former method: when carrying out curve linear deflection, by certain for curve the most upwardly or downwardly linear deflection
Numerical value, obtain curve of deviation.
The problem that former method exists: during combining production, if what curve entirety in a coordinate system offset downward
Numerical value is excessive, will result in the curve value to negative infinite end close to transverse axis or under transverse axis, and the value i.e. obtained is close to 0
Or below 0, so will result in IMOD current compensation occur when low temperature that IMOD electric current is too small or be directly zero feelings
Condition occurs, and causes optical module to launch eye pattern and directly closes, affects the service behaviour of optical module.
Summary of the invention
The technical problem that present invention mainly solves be to provide a kind of be applicable to optical module produce there is the linear of lower limit
Migration algorithm, solve actual production utilizes chip two close cycles characteristic carry out total according in the skew of IMOD form time avoid the occurrence of
The IMOD current offset values occurred when low temperature after skew is the least or situation close to 0.
For solving above-mentioned technical problem, the technical scheme that the present invention uses is: provides one and is applicable to optical module
The linear deflection algorithm with lower limit produced, including step in detail below:
A, by during low temperature IMOD DAC allow minima be written in configuration file Ini；
IMOD form in b, the total evidence of reading, and find the minima in form；
The difference of the IMOD DAC that c, the minima calculated in IMOD form are minimum with the permission of offer, referred to as standard deviation；
D, the IMOD DAC value read under Current Temperatures point, read 6 times；
E, find the IMOD DAC value in form under Current Temperatures point, by the IMOD DAC value in form and core under Current Temperatures point
The IMOD DAC value that sheet reports does difference, if this difference is more than standard deviation, then records this exceptional value index；
If f all can not get normal value for 6 times, then provide prompting, adjust TX Power depositor, reduce under Current Temperatures point
The value of IMOD DAC depositor；
G, process contrast, remove exceptional value, normal value be averaged, obtain IMOD DAC value available under Current Temperatures point；
H, the IMOD DAC value in the IMOD DAC value obtained and form is done difference, and do curve offset；
I, formation curve.
The invention has the beneficial effects as follows: the present invention is applicable to the linear deflection calculation with lower limit that optical module produces
Method, can avoid when utilizing chip two close cycles characteristic to obtain single closed loop IMOD compensating curve, due to Current Temperatures point IMOD
When DAC value is bigger, making the curve offset out without lower limit control, when causing single closed loop, IMOD current compensation occurs when low temperature
The situation that IMOD current value is the least or abnormal, is effectively prevented the mould utilizing two close cycles characteristic to make single closed loop IMOD compensation table
Block eye pattern at low temperatures, close to closedown, affects the use of optical module.
Accompanying drawing explanation
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, in embodiment being described below required for make
Accompanying drawing be briefly described, it should be apparent that, below describe in accompanying drawing be only some embodiments of the present invention, for
From the point of view of those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other according to these accompanying drawings
Accompanying drawing, wherein:
Fig. 1 is the flow process being applicable to linear deflection algorithm one preferred embodiment with lower limit that optical module produces in the present invention
Figure.
Detailed description of the invention
Technical scheme in the embodiment of the present invention will be clearly and completely described below, it is clear that described enforcement
Example is only a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, this area is common
All other embodiments that technical staff is obtained under not making creative work premise, broadly fall into the model of present invention protection
Enclose.
As it is shown in figure 1, the embodiment of the present invention includes:
A kind of linear deflection algorithm with lower limit being applicable to optical module production, including step in detail below:
A, by during low temperature IMOD DAC allow minima be written in configuration file Ini；
IMOD form in b, the total evidence of reading, and find the minima in form；
The difference of the IMOD DAC that c, the minima calculated in IMOD form are minimum with the permission of offer, referred to as standard deviation；
D, the IMOD DAC value read under Current Temperatures point, read 6 times；
E, find the IMOD DAC value in form under Current Temperatures point, by the IMOD DAC value in form and core under Current Temperatures point
The IMOD DAC value that sheet reports does difference, if this difference is more than standard deviation, then records this exceptional value index；
If f all can not get normal value for 6 times, then provide prompting, adjust TX Power depositor, reduce under Current Temperatures point
The value of IMOD DAC depositor；
G, process contrast, remove exceptional value, normal value be averaged, obtain IMOD DAC value available under Current Temperatures point；
H, the IMOD DAC value in the IMOD DAC value obtained and form is done difference, and do curve offset；
I, formation curve.
Operation principle is: the IMOD reported with now chip according to the IMOD DAC value in the full data form of Current Temperatures
The difference of minimum IMOD DAC value is carried out with form for the difference of DAC value and the DAC value of the IMOD minima required by engineer
Relatively, if the former is more than the latter, then it is assumed that the IMOD DAC value that now chip reports is abnormal data, it is possible to cause low
The situation that the lower IMOD current compensation of temperature is too small, now regulation chip TX POWER register-bit, make under Current Temperatures on chip
The IMOD DAC value of report reduces, until at the IMOD DAC of Current Temperatures point in the IMOD DAC value under Current Temperatures and form
Difference, less than the DAC value of the IMOD minima required by engineer and the difference of minimum IMOD DAC value in form, is now carried out
Curve offset.
Under the characteristic utilizing chip two close cycles, when carrying out IMOD form skew in total evidence, it is to avoid in some extreme feelings
The situation that when causing the low temperature that IMOD form entirety causes when offseting downward under condition, IMOD current offset values is the least or almost nil.
Optical module is caused to launch the consequence that eye pattern is closed.
In sum, the present invention is applicable to the linear deflection algorithm with lower limit that optical module produces, and can avoid
When utilizing chip two close cycles characteristic to obtain single closed loop IMOD compensating curve, owing to Current Temperatures point IMOD DAC value is bigger
Time, make the curve offset out without lower limit control, when causing single closed loop, there is IMOD current value very when low temperature in IMOD current compensation
Little or abnormal situation, is effectively prevented the module eye at low temperatures utilizing two close cycles characteristic to make single closed loop IMOD compensation table
Figure, close to closedown, affects the use of optical module.
The foregoing is only embodiments of the invention, not thereby limit the scope of the claims of the present invention, every utilize this
Equivalent structure or equivalence flow process that bright description is made convert, or are directly or indirectly used in other relevant technology neck
Territory, is the most in like manner included in the scope of patent protection of the present invention.
Claims (1)
1. one kind is applicable to the linear deflection algorithm with lower limit that optical module produces, it is characterised in that include in detail below
Step:
A, by during low temperature IMOD DAC allow minima be written in configuration file Ini；
IMOD form in b, the total evidence of reading, and find the minima in form；
The difference of the IMOD DAC that c, the minima calculated in IMOD form are minimum with the permission of offer, referred to as standard deviation；
D, the IMOD DAC value read under Current Temperatures point, read 6 times；
E, find the IMOD DAC value in form under Current Temperatures point, by the IMOD DAC value in form and core under Current Temperatures point
The IMOD DAC value that sheet reports does difference, if this difference is more than standard deviation, then records this exceptional value index；
If f all can not get normal value for 6 times, then provide prompting, adjust TX Power depositor, reduce under Current Temperatures point
The value of IMOD DAC depositor；
G, process contrast, remove exceptional value, normal value be averaged, obtain IMOD DAC value available under Current Temperatures point；
H, the IMOD DAC value in the IMOD DAC value obtained and form is done difference, and do curve offset；
I, formation curve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610519092.3A CN106155688A (en) | 2016-07-05 | 2016-07-05 | A kind of linear deflection algorithm with lower limit being applicable to optical module production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610519092.3A CN106155688A (en) | 2016-07-05 | 2016-07-05 | A kind of linear deflection algorithm with lower limit being applicable to optical module production |
Publications (1)
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| CN106155688A true CN106155688A (en) | 2016-11-23 |
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| CN201610519092.3A Pending CN106155688A (en) | 2016-07-05 | 2016-07-05 | A kind of linear deflection algorithm with lower limit being applicable to optical module production |
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| CN103390857A (en) * | 2013-07-11 | 2013-11-13 | 青岛海信宽带多媒体技术有限公司 | Optical module lookup table generating method and device |
| CN103904542A (en) * | 2014-03-11 | 2014-07-02 | 厦门优迅高速芯片有限公司 | Laser driver double closed loop control method capable of being used for burst mode |
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| CN104280791A (en) * | 2014-09-26 | 2015-01-14 | 宁波绮耘软件有限公司 | Meteorological data quality control and processing method and system |
| CN104682192A (en) * | 2013-01-06 | 2015-06-03 | 青岛海信宽带多媒体技术有限公司 | Method and device for generating temperature lookup table of optical module |
| CN104734004A (en) * | 2013-01-06 | 2015-06-24 | 青岛海信宽带多媒体技术有限公司 | Method and device for generating optical module temperature lookup table |
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2016
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| CN101692401A (en) * | 2009-09-04 | 2010-04-07 | 北京齐瑞得电力技术有限公司 | Optical fiber current transformer with optical fiber temperature acquisition and temperature compensation |
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| US20140293542A1 (en) * | 2013-03-30 | 2014-10-02 | Jan Vetrovec | Thermal mgmt. device for high-heat flux electronics |
| CN103390857A (en) * | 2013-07-11 | 2013-11-13 | 青岛海信宽带多媒体技术有限公司 | Optical module lookup table generating method and device |
| CN103904542A (en) * | 2014-03-11 | 2014-07-02 | 厦门优迅高速芯片有限公司 | Laser driver double closed loop control method capable of being used for burst mode |
| CN104280791A (en) * | 2014-09-26 | 2015-01-14 | 宁波绮耘软件有限公司 | Meteorological data quality control and processing method and system |
| CN105300412A (en) * | 2015-07-27 | 2016-02-03 | 桂林电子科技大学 | Temperature self compensation method for LAPS (Light Addressable Potentiometric Sensor) |
| CN105242739A (en) * | 2015-10-30 | 2016-01-13 | 江苏奥雷光电有限公司 | Temperature control bias current supply circuit, bias current temperature control method and laser driver |
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Application publication date: 20161123 |