CN101944705A - Working method for DFB laser-based XFP optical module for transmission - Google Patents
Working method for DFB laser-based XFP optical module for transmission Download PDFInfo
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Abstract
The invention discloses a method and optimization for adjusting an XFP optical module which adopts a distributed feedback (DFB) semiconductor laser by the gradual change of a digital potentiometer DAC and making the XFP optical module work at the best working point. The method and the optimization are suitable for a high-speed low-power consumption long-distance transmission optical fiber communication system; a microcontroller adjusts an APC control circuit through lookup tables (LUTs) to compensate bias current Ibias so as to make the set output light power of the DFB laser component the set output light power value which corresponds to the temperature range, and stabilizes the temperature of the DFB laser within the set output light power range through the APC control circuit; and the invention discloses a method for testing through two LUTs and three temperature points, and makes the XFP optical module which adopts the distributed feedback (DFB) semiconductor laser work under the best condition.
Description
Technical field
The present invention relates to the electrooptical device field in fiber data communication and the telecom communication, particularly the long Distance Transmission XFP optical module of high-speed low-power-consumption.
Background technology
As the core devices of fiber optic communication network, optical module has promoted the main line optical transmission system to low cost, big capacity, and the direction of low-power consumption develops, and makes that the configuration of optical-fiber network is more complete reasonable, and volume is more and more littler, and the interface density that interface board comprises is more and more higher.Optical module is by opto-electronic device, structural member such as functional circuit and optic electric interface is formed, opto-electronic device comprises and transmits and receives two parts: for different application, radiating portion comprises LED, VCSEL, FP, DFB, with several light sources such as EML, receiving unit comprises PIN and two types of photo-detectors of APD.For being used for the high-speed optical module that the long haul optical transmission systems of big capacity is used, light source need be taked the EML laser assembly that freezes and the EML laser driver of high power consumption, and like this, the power consumption of whole high-speed optical module is difficult to reduce.In addition, because the power consumption of temperature controller in the market is also very high, especially its efficient is very low under low refrigeration electric current, causes the power consumption of overall optical module further to increase.
Be not used for long haul optical transmission systems high-speed optical module so there is the Distributed Feedback Laser of refrigeration heating, can significantly reduce power consumption.But the laser optical power and the extinction ratio that need to solve under the variations in temperature are stable, and optimization Distributed Feedback Laser operating state (eye pattern mask has maximum allowance).Owing to cancelled refrigeration heating component (TEC circuit), greatly reduce the manufacturing cost of optical module simultaneously.
Summary of the invention
The objective of the invention is to overcome the defective of prior art, provide a kind of and can effectively reduce power consumption, the long Distance Transmission XFP optical module of the high-speed low-power-consumption that while guaranteed performance technical indicator does not reduce.
The long Distance Transmission of high-speed low-power-consumption of the present invention is achieved by following technical proposals with the XFP optical module:
The long Distance Transmission XFP optical module of high-speed low-power-consumption, comprise Distributed Feedback Laser assembly and optical detector component in electrical interface, optical fiber input/output interface, the XFP optical module, also comprise microcontroller and be connected in XFP optical module electrical interface and the Distributed Feedback Laser assembly between low-power consumption DML Laser Drive module, be used for Driven DF B laser assembly; Adopt EML Laser Drive module drive EML laser assembly in the existing XFP optical module, EML Laser Drive module produces big power consumption, adopt low-power consumption DML Laser Drive module+Distributed Feedback Laser to replace EML Laser Drive module drive EML laser assembly among the present invention, in the hope of reaching the effect that reduces power consumption; Electroabsorption modulator with suitable resistance match circuit maximal efficiency ground modulation Distributed Feedback Laser assembly; In the present invention, described low-power consumption DML Laser Drive inside modules has auto light power stabilization control circuit APC, it is digital-analog convertor that there is DAC(Digital-to-Analog Converter microcontroller inside), there is LUT (Look-Up Table) microcontroller inside.
As a kind of improvement of the present invention, must overcome the inherent shortcoming that the Distributed Feedback Laser device is used for long haul optical transmission systems, also need make following improvement: Distributed Feedback Laser assembly Output optical power is by auto light power stabilization control circuit (APC) control, with the Output optical power scope division of Distributed Feedback Laser assembly is two and above control interval, setting power value in the corresponding interval of each temperature range, microcontroller is by the linear relationship of the corresponding laser temperature inside of temperature sampling of self, thereby detecting laser temperature inside, judge and belong to which temperature range, microcontroller is adjusted the APC control circuit by LUT bias current (Ibias) is compensated, make the Output optical power of setting the Distributed Feedback Laser assembly setting Output optical power value for this temperature range correspondence, and by the APC control circuit with the Distributed Feedback Laser temperature stabilization in the Output optical power scope that sets.The optimum Working of Distributed Feedback Laser is at normal temperature, use for commerce, want to be operated in-5 degrees centigrade to 70 degrees centigrade, so must be when low temperature corresponding increasing luminous power to optimize eye pattern, the corresponding luminous power that reduces is to guarantee that extinction ratio is stable and to satisfy ITU standard (ITU:INTERNATIONAL TELECOMMUNICATION UNION, i.e. International Telecommunications Union during high temperature; Present patent application relates generally to standard No.: G.691).Original way is under the full temperature condition Output optical power of Distributed Feedback Laser to be set under the value, and the laser Output optical power is constant down to realize full temperature by the APC control mode, needs only by extinction ratio is compensated like this.The present invention is set in several temperature such as P1 with the laser Output optical power by APC, P2, P3 and three power points all need satisfy ITU standard (ITU is International Telecommunications Union's telecommunication standards group), P2 is the normal temperature Output optical power, P1 is the low temperature Output optical power, P3 is the high temperature Output optical power, and the linking of full temperature realizes by LUT.At 3 power points, need microprocessor that the DAC microcontroller is set extinction ratio is carried out temperature-compensating, the linking of full temperature realizes by LUT; LUT(Look-Up-Table) be exactly a RAM in essence; After data are write RAM in advance, table look-up, find out the content of address correspondence, then output whenever signal of input just equals to import an address; LUT (Look-Up Table) in fact is exactly the mapping table of a grey scale pixel value, conversion that the grey scale pixel value process that it arrives actual samples is certain such as threshold value, counter-rotating, binaryzation, contrast adjustment, linear transformation etc., become another one corresponding gray with it, can play the useful information of outstanding image like this, strengthen the effect of the optical contrast ratio of image.
The long Distance Transmission of high-speed low-power-consumption of the present invention with the XFP optical module compared with prior art has following good effect:
The long Distance Transmission XFP optical module of high-speed low-power-consumption of the present invention is made improvement from many aspects, reduced optical module power consumption, improved the yield that Distributed Feedback Laser is used to manufacture, improved laser switching rate (bandwidth) to greatest extent.Make nothing refrigeration Distributed Feedback Laser be used for the long Distance Transmission of high-speed low-power-consumption and be achieved,, be fit to very much optical module and make production on a large scale simultaneously through as above optimizing.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Embodiment
Disclosed arbitrary feature in this specification (comprising any accessory claim, summary and accompanying drawing) is unless special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, unless special narration, each feature is an example in a series of equivalences or the similar characteristics.
The long Distance Transmission XFP optical module of the high-speed low-power-consumption of present embodiment, as shown in Figure 1, comprise Distributed Feedback Laser assembly and optical detector component in electrical interface, optical fiber input/output interface, the XFP optical module, also comprise the DML Laser Drive module that is connected between XFP optical module electrical interface and the Distributed Feedback Laser assembly, be used for Driven DF B laser assembly; Also comprise the microcontroller that is used to realize the every function of module.
Distributed Feedback Laser assembly Output optical power is by auto light power stabilization control circuit (APC) control, with the Output optical power scope division of Distributed Feedback Laser assembly is two and above control interval, setting power value in the corresponding interval of each temperature range, microcontroller is by the linear relationship of the corresponding laser temperature inside of temperature sampling of self, thereby detecting laser temperature inside, judge and belong to which temperature range, microcontroller is adjusted the APC control circuit by LUT bias current is compensated, make the Output optical power of setting the Distributed Feedback Laser assembly setting Output optical power value for this temperature range correspondence, and by the APC control circuit with the Distributed Feedback Laser temperature stabilization in the Output optical power scope that sets.
Important enforcement is: according to temperature spot high temperature, and low temperature, normal temperature, 3 points are adjusted average light power and extinction ratio (average light power and extinction ratio interact), make its Distributed Feedback Laser be operated in optimum state, to obtain maximum eye pattern mask allowance.For guaranteeing the full temperature work of Distributed Feedback Laser assembly in the best condition, adopt the present normal temperature of software algorithm place to fix the P2 value, this P2 value is set need be near ITU standard (ITU:INTERNATIONAL TELECOMMUNICATION UNION, i.e. International Telecommunications Union; Present patent application relates generally to standard No.: the G.691) upper limit of Yao Qiuing writes among the LUT as initial value.Use the given normal temperature of software algorithm place's delustring ratio simultaneously.Again in high temperature place debugging P3 value, based on the P2 value, the compensation extinction ratio, whether if extinction ratio reaches the ITU standard, it is up to standard then to test eye pattern mask, up to standard with regard to P3=P2, if eye pattern mask can not be up to standard, then software algorithm is whenever successively decreased a step by certain stepping luminous power of successively decreasing on the P2 value basis, need to test extinction ratio and eye pattern mask again in order, be limited to the desired luminous power lower limit of ITU standard under successively decreasing.Last gained P3 is the high temperature optimal value, writes LUT, gets the P2 linear fit with the normal temperature place again, and software algorithm is given P3 place's delustring ratio simultaneously, with normal temperature extinction ratio linear fit.At last in low temperature place debugging P3 value, based on the P2 value, the compensation extinction ratio, whether up to standard, up to standard with regard to P1=P2 if then testing eye pattern mask, if eye pattern mask can not be up to standard, then software algorithm is gone up by certain step increments luminous power in P2 value basis, whenever successively decrease a step, need to test extinction ratio and eye pattern mask again in order, be limited to the desired luminous power higher limit of ITU standard on increasing progressively.Last gained P1 is the low temperature optimal value, gets the P2 linear fit with the normal temperature place again, and software algorithm is given P1 place's delustring ratio simultaneously, with normal temperature extinction ratio linear fit.Finishing above step, is that the long haul optical transmission systems high-speed optical module of main devices just is operated in optimum state with DFB.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. a high-speed low-power-consumption is grown Distance Transmission XFP optical module, comprise Distributed Feedback Laser assembly and optical detector component in electrical interface, optical fiber input/output interface, the XFP optical module, it is characterized in that: also comprise microcontroller and be connected in the aforementioned electric interface of described XFP optical module and the low-power consumption DML Laser Drive module between the described Distributed Feedback Laser assembly.
2. the long Distance Transmission XFP optical module of high-speed low-power-consumption according to claim 1, it is characterized in that: described low-power consumption DML Laser Drive module is controlled the Output optical power of aforementioned Distributed Feedback Laser assembly by its inner auto light power stabilization control circuit APC, and described microcontroller is adjusted described microcontroller inside by its inner LUT DAC carries out temperature-compensating to modulation electric current I mod.
3. the long Distance Transmission XFP optical module of high-speed low-power-consumption according to claim 2, it is characterized in that: with the Output optical power scope division of described Distributed Feedback Laser assembly is two and above control interval, setting power value in the corresponding interval of each temperature range, described microcontroller is by the linear relationship of the corresponding described laser temperature inside of temperature sampling of self, thereby survey described laser temperature inside, judge and belong to which temperature range, described microcontroller is adjusted aforementioned APC control circuit by aforementioned LUT bias current Ibias is compensated, make the Output optical power of setting described Distributed Feedback Laser assembly setting Output optical power value for this temperature range correspondence, and by aforementioned APC control circuit with aforementioned Distributed Feedback Laser temperature stabilization in the Output optical power scope that sets.
4. the long Distance Transmission XFP optical module of high-speed low-power-consumption according to claim 3, it is characterized in that: in entire work process, adopt software algorithm to fix P2 value at the normal temperature place earlier, this P2 value setting need be near the upper limit of ITU standard-required, and writes among the described LUT as initial value; Simultaneously by the given normal temperature of software algorithm place's delustring ratio; Again in high temperature place debugging P3 value, based on the P2 value, the compensation extinction ratio, whether if extinction ratio reaches the ITU standard, it is up to standard then to test eye pattern mask, up to standard with regard to P3=P2, if eye pattern mask can not be up to standard, then software algorithm is whenever successively decreased a step by certain stepping luminous power of successively decreasing on the P2 value basis, need to test extinction ratio and eye pattern mask again in order, be limited to the desired luminous power lower limit of ITU standard under successively decreasing; Gained P3 is the high temperature optimal value then, and it is write described LUT, gets the P2 linear fit with the normal temperature place again, and software algorithm is given P3 place's delustring ratio simultaneously, again with normal temperature extinction ratio linear fit; Then in low temperature place debugging P3 value, based on the P2 value, the compensation extinction ratio, whether up to standard, up to standard with regard to P1=P2 if then testing this eye pattern mask, if this eye pattern mask can not be up to standard, then software algorithm is gone up by certain step increments luminous power in P2 value basis, whenever successively decrease a step, need to test extinction ratio and this eye pattern mask again in order, be limited to the desired luminous power higher limit of this ITU standard on increasing progressively; Last gained P1 is the low temperature optimal value, gets the P2 linear fit with the normal temperature place, and software algorithm is given P1 place's delustring ratio simultaneously, again with normal temperature extinction ratio linear fit.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102215063A (en) * | 2011-05-31 | 2011-10-12 | 索尔思光电（成都）有限公司 | Core parameter debugging method of long-reach 10 gigabit small form factor pluggable (XFP) module based on electro-absorption modulated laser (EML) |
| CN102843191A (en) * | 2012-09-29 | 2012-12-26 | 青岛海信宽带多媒体技术有限公司 | Method and device for adjusting emitted light power of optical module |
| CN103078249A (en) * | 2013-01-06 | 2013-05-01 | 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 |
| WO2013143055A1 (en) * | 2012-03-26 | 2013-10-03 | 武汉华工正源光子技术有限公司 | Laser transceiver device, manufacturing method therefor, and method for enlarging temperature operating range thereof |
| CN104269737A (en) * | 2014-10-24 | 2015-01-07 | 成都新易盛通信技术股份有限公司 | Optical module as well as debugging system and debugging method thereof |
| 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 |
| CN105656562B (en) * | 2016-03-18 | 2018-02-16 | 江苏奥雷光电有限公司 | A kind of photoelectric conversion module extinction ratio autocontrol method |
| CN108631874A (en) * | 2017-03-20 | 2018-10-09 | 日照市艾锐光电科技有限公司 | The OLT optical assemblies and optical module without refrigerator towards 10G-PON applications |
| CN109449727A (en) * | 2018-12-26 | 2019-03-08 | 东莞铭普光磁股份有限公司 | A kind of optical module parameter configuration method, device, equipment and storage medium |
| CN112104424A (en) * | 2020-09-03 | 2020-12-18 | 南京捷澳德信息科技有限公司 | High-temperature extinction ratio optimization method for 5G forward-transmission industrial-grade optical module |
| CN113092867A (en) * | 2021-03-29 | 2021-07-09 | 上海橙科微电子科技有限公司 | Method, system and medium for testing continuity of impedance of light module transmission system through square wave |
| CN113258997A (en) * | 2021-06-28 | 2021-08-13 | 深圳博升光电科技有限公司 | Optical module and optical module control method |
| CN114284860A (en) * | 2021-12-16 | 2022-04-05 | 厦门亿芯源半导体科技有限公司 | Direct-current coupling output power supply configuration scheme of DFB laser with adjustable voltage difference |
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Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102215063A (en) * | 2011-05-31 | 2011-10-12 | 索尔思光电（成都）有限公司 | Core parameter debugging method of long-reach 10 gigabit small form factor pluggable (XFP) module based on electro-absorption modulated laser (EML) |
| CN102215063B (en) * | 2011-05-31 | 2014-03-12 | 索尔思光电（成都）有限公司 | Core parameter debugging method of long distance XFP module based on electro-absorption modulated laser (EML) |
| WO2013143055A1 (en) * | 2012-03-26 | 2013-10-03 | 武汉华工正源光子技术有限公司 | Laser transceiver device, manufacturing method therefor, and method for enlarging temperature operating range thereof |
| CN102843191A (en) * | 2012-09-29 | 2012-12-26 | 青岛海信宽带多媒体技术有限公司 | Method and device for adjusting emitted light power of optical module |
| CN102843191B (en) * | 2012-09-29 | 2015-03-25 | 青岛海信宽带多媒体技术有限公司 | Method and device for adjusting emitted light power of optical module |
| CN103078249A (en) * | 2013-01-06 | 2013-05-01 | 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 |
| 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 |
| CN104682192B (en) * | 2013-01-06 | 2017-07-11 | 青岛海信宽带多媒体技术有限公司 | Generate the method and device of temperature lookup table of optical module |
| CN104269737A (en) * | 2014-10-24 | 2015-01-07 | 成都新易盛通信技术股份有限公司 | Optical module as well as debugging system and debugging method thereof |
| CN105656562B (en) * | 2016-03-18 | 2018-02-16 | 江苏奥雷光电有限公司 | A kind of photoelectric conversion module extinction ratio autocontrol method |
| CN108631874A (en) * | 2017-03-20 | 2018-10-09 | 日照市艾锐光电科技有限公司 | The OLT optical assemblies and optical module without refrigerator towards 10G-PON applications |
| CN108631874B (en) * | 2017-03-20 | 2021-07-06 | 日照市艾锐光电科技有限公司 | Optical Line Terminal (OLT) optical assembly and optical module without refrigerator for 10G-PON application |
| CN109449727A (en) * | 2018-12-26 | 2019-03-08 | 东莞铭普光磁股份有限公司 | A kind of optical module parameter configuration method, device, equipment and storage medium |
| CN109449727B (en) * | 2018-12-26 | 2020-11-10 | 东莞铭普光磁股份有限公司 | Optical module parameter configuration method, device, equipment and storage medium |
| CN112104424A (en) * | 2020-09-03 | 2020-12-18 | 南京捷澳德信息科技有限公司 | High-temperature extinction ratio optimization method for 5G forward-transmission industrial-grade optical module |
| CN112104424B (en) * | 2020-09-03 | 2022-04-01 | 南京捷澳德信息科技有限公司 | High-temperature extinction ratio optimization method for 5G forward-transmission industrial-grade optical module |
| CN113092867A (en) * | 2021-03-29 | 2021-07-09 | 上海橙科微电子科技有限公司 | Method, system and medium for testing continuity of impedance of light module transmission system through square wave |
| CN113258997A (en) * | 2021-06-28 | 2021-08-13 | 深圳博升光电科技有限公司 | Optical module and optical module control method |
| CN114284860A (en) * | 2021-12-16 | 2022-04-05 | 厦门亿芯源半导体科技有限公司 | Direct-current coupling output power supply configuration scheme of DFB laser with adjustable voltage difference |
| CN114284860B (en) * | 2021-12-16 | 2023-06-13 | 厦门亿芯源半导体科技有限公司 | Differential pressure adjustable DFB laser DC coupling output power supply configuration method |
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