CN102013624A - Automatic debugging method for optical eye diagram of optical module - Google Patents
Automatic debugging method for optical eye diagram of optical module Download PDFInfo
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- CN102013624A CN102013624A CN2010105195987A CN201010519598A CN102013624A CN 102013624 A CN102013624 A CN 102013624A CN 2010105195987 A CN2010105195987 A CN 2010105195987A CN 201010519598 A CN201010519598 A CN 201010519598A CN 102013624 A CN102013624 A CN 102013624A
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Abstract
The invention provides an automatic debugging method for an optical eye diagram of an optical module. In the method, threshold current of a laser is obtained firstly and bias current of the optical module is set as the sum of the threshold current and a balance coefficient by a computer, so that the optical eye diagram is debugged automatically without artificial debugging; and Compared with the prior art, the method can prevent the influence of subjective factors of human on quality, realize debugging without using expensive data analyzers and reduce production cost simultaneously.
Description
Technical field
The present invention relates to a kind of adjustment method, especially a kind of automatically debug method of optical module light eye pattern.
Background technology
The method of the light eye pattern of laser is to utilize the machinery of optical module inside or the working point that digital regulation resistance is manually adjusted laser in traditional debugging optical module, and the technical indicator extinction ratio (EXTRATIO) of light eye pattern and crosspoint (CROSSING) are met the demands.
When adopting manual adjustment method, in the time of operator's manual adjustment potentiometer numerical value, eyes also will stare at the variation of two data of extinction ratio and crosspoint of data communication analysis.Even because its working point of same batch laser also is likely different.So the numerical value of potentiometer also is different.Sometimes needing to adjust to back and forth eye pattern meets the demands.
Its shortcoming is: (1) people's subjective factor is bigger to the influence of quality.(2) need expensive data analyzer to debug, judge.Whether qualified.(3) cost of production capacity increase is than higher.
Therefore, need a kind of new technical scheme to address the above problem.
Summary of the invention
The objective of the invention is deficiency, a kind of adjustment method of carrying out the automatic debugging of extinction ratio in the optical module and crosspoint is provided at the prior art existence.
For achieving the above object, the automatically debug method of optical module light eye pattern of the present invention can adopt following technical scheme:
A kind of automatically debug method of optical module light eye pattern is characterized in that: this automatic light eye pattern adjustment method comprises the steps:
(1) close the modulated current in the laser works electric current in the optical module earlier, the light device has only bias current that electric current is provided, and makes this bias current retouch the delta data of luminous power from 0～20mA, and obtains the threshold current of laser by COMPUTER CALCULATION by these data;
(2) open in the optical module modulated current in the laser works electric current and coefficient of balance is provided, the bias current by the computer installation optical module is threshold current and coefficient of balance sum.
Compare with background technology, the automatically debug method of optical module light eye pattern of the present invention is threshold current and coefficient of balance sum by the bias current by the computer installation optical module, the light eye pattern is debugged automatically, need not by manually debugging, can avoid of the influence of people's subjective factor with respect to background technology to quality, and need not expensive data analyzer could debug, and has reduced production cost simultaneously.
Description of drawings
Accompanying drawing is each element connection layout of the automatically debug method of optical module light eye pattern of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, further illustrate the present invention, should understand these embodiment only is used to the present invention is described and is not used in and limit the scope of the invention, after having read the present invention, those skilled in the art all fall within the application's claims institute restricted portion to the modification of the various equivalent form of values of the present invention.
See also shown in the accompanying drawing, the present invention discloses a kind of automatically debug method of optical module light eye pattern, in this method tested TX optical module is connected on the optical module test board, and this test board is connected computer and Error Detector respectively.
This automatic light eye pattern adjustment method comprises the steps:
(1) close the modulated current in the laser works electric current in the optical module earlier, the light device has only bias current that electric current is provided, and makes this bias current retouch the delta data of luminous power from 0～20mA, and obtains the threshold current of laser by COMPUTER CALCULATION by these data;
(2) open in the optical module modulated current in the laser works electric current and coefficient of balance is provided, the bias current by the computer installation optical module is threshold current and coefficient of balance sum.
The operating current of laser (IOP) in the described optical module=modulated current (IMOD)+bias current (IBAS), the mode of employing direct current and direct-current coupling between laser and the driver, the eye pattern adjustment method is identical.
For adopting the mode of direct-current coupling between laser and the driver is example:
The luminous power of zero level correspondence is P0, and the luminous power of a level correspondence is P1, and when modulated current one timing, digital regulation resistance is actual to be to adjust bias current, makes bias current be slightly larger than the threshold current (ITH) of laser.In order to obtain high extinction ratio, must reduce P0, promptly reduce bias current.But bias current is too small, can cause the crosspoint of eye pattern to be crossed and lowly not meet the demands.So general bias current=threshold current+IK (coefficient of balance).IK is a coefficient, can guarantee enough extinction ratios, the crosspoint is met the demands, thereby by being threshold current and coefficient of balance (IK) sum by the bias current of computer installation optical module in the step (2), the light eye pattern is debugged automatically, be need not to avoid of the influence of people's subjective factor with respect to background technology quality by manually debugging, and need not expensive data analyzer could debug, and has reduced production cost simultaneously.
Claims (2)
1. the automatically debug method of an optical module light eye pattern, it is characterized in that: this automatic light eye pattern adjustment method comprises the steps:
(1) close the modulated current in the laser works electric current in the optical module earlier, the light device has only bias current that electric current is provided, and makes this bias current retouch the delta data of luminous power from 0～20mA, and obtains the threshold current of laser by COMPUTER CALCULATION by these data;
(2) open in the optical module modulated current in the laser works electric current and coefficient of balance is provided, the bias current by the computer installation optical module is threshold current and coefficient of balance sum.
2. the automatically debug method of optical module light eye pattern as claimed in claim 1, it is characterized in that: in this method tested optical module is connected on the optical module test board, and this test board connected computer and Error Detector respectively, utilize the combination of optical module self and test macro, meter is calculated the threshold current of laser, open the modulated current in the laser works electric current in the optical module again, and suitable bias current is provided, realize debugging automatically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105195987A CN102013624A (en) | 2010-10-26 | 2010-10-26 | Automatic debugging method for optical eye diagram of optical module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105195987A CN102013624A (en) | 2010-10-26 | 2010-10-26 | Automatic debugging method for optical eye diagram of optical module |
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| Publication Number | Publication Date |
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| CN102013624A true CN102013624A (en) | 2011-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010105195987A Pending CN102013624A (en) | 2010-10-26 | 2010-10-26 | Automatic debugging method for optical eye diagram of optical module |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102664689A (en) * | 2012-03-26 | 2012-09-12 | 华为技术有限公司 | Determination method of eye pattern quality and apparatus thereof |
| CN104821478A (en) * | 2015-05-31 | 2015-08-05 | 厦门大学 | Integratable automatic debugging circuit for optical eye pattern transmitted by optical module |
| CN111200465A (en) * | 2018-11-19 | 2020-05-26 | 慧与发展有限责任合伙企业 | Method of calibrating a receiver for an optical communication link, optical receiver, medium |
| CN111953411A (en) * | 2019-05-15 | 2020-11-17 | 尚宁光电无锡有限公司 | Optical module transmitting end eye diagram debugging method without eye diagram instrument |
| CN113708212A (en) * | 2021-10-28 | 2021-11-26 | 成都明夷电子科技有限公司 | Test method based on APC and AER loop electrical measurement circuit |
-
2010
- 2010-10-26 CN CN2010105195987A patent/CN102013624A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102664689A (en) * | 2012-03-26 | 2012-09-12 | 华为技术有限公司 | Determination method of eye pattern quality and apparatus thereof |
| CN102664689B (en) * | 2012-03-26 | 2014-07-09 | 华为技术有限公司 | Determination method of eye pattern quality and apparatus thereof |
| CN104821478A (en) * | 2015-05-31 | 2015-08-05 | 厦门大学 | Integratable automatic debugging circuit for optical eye pattern transmitted by optical module |
| CN111200465A (en) * | 2018-11-19 | 2020-05-26 | 慧与发展有限责任合伙企业 | Method of calibrating a receiver for an optical communication link, optical receiver, medium |
| CN111953411A (en) * | 2019-05-15 | 2020-11-17 | 尚宁光电无锡有限公司 | Optical module transmitting end eye diagram debugging method without eye diagram instrument |
| CN113708212A (en) * | 2021-10-28 | 2021-11-26 | 成都明夷电子科技有限公司 | Test method based on APC and AER loop electrical measurement circuit |
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Application publication date: 20110413 |