CN101141047A - Work station regulation means of direct regulating outside cavity laser and adjusting apparatus - Google Patents
Work station regulation means of direct regulating outside cavity laser and adjusting apparatus Download PDFInfo
- Publication number
- CN101141047A CN101141047A CNA2006100308751A CN200610030875A CN101141047A CN 101141047 A CN101141047 A CN 101141047A CN A2006100308751 A CNA2006100308751 A CN A2006100308751A CN 200610030875 A CN200610030875 A CN 200610030875A CN 101141047 A CN101141047 A CN 101141047A
- Authority
- CN
- China
- Prior art keywords
- laser
- temperature
- wavelength
- outside cavity
- die temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
A workpoint adjusting method of straightening exocoel laser is provided, the processes are that: firstly, the output light efficiency of the straightening exocoel laser is nominal output efficiency; secondly, the temperature of a tube core is adjusted to make the output light wavelength reach the nominal wavelength; thirdly, the corresponding adjustment quantity value of the tube core when reaching the nominal wavelength in the previous step; fourthly, testing process; fifthly, if the temperature of middle tube core is correct, when reducing the temperature of the tube core in single direction continuously, the changes of the wavelength is linetype, if the temperature of the tube core is correct, otherwise, incorrect; sixthly, if the temperature of the tube core is correct, the recording value is recovered; if incorrect, returning to the second process; seventhly, the extinction ratio of the laser is adjusted. An adjusting device which is composed of a straightening exocoel laser, a laser drive circuit, an automatic control circuit and an automatic efficiency control circuit is provided. Aiming to the characteristic relation between the temperature of the tube core and the wavelength of the straightening exocoel laser, the adjusting processes are provided, therefore ensuring the transmission performance and the adaptation on light transmission system.
Description
Technical field
The present invention relates to the important devices direct regulating outside cavity laser in the optical transmission system, be specifically related to a kind of Work station regulation means and adjusting device of direct regulating outside cavity laser.
Background technology
Laser is the important devices in the optical transmission system, that adopt mostly in the high-speed optical transmission system of long Distance Transmission is DFB (Distributed Feed Back, distributed feed-back) laser, the wavelength of this laser selects part (Bragg grating) to be integrated in active area on concrete structure.Yet progress along with laser technique, the direct regulating outside cavity laser that wavelength selects part to be arranged in laser material external passive district also begins to use in that the success of optical communication field is commercial, the direct regulating outside cavity laser of the typical as 2.5Gb/s length distance that K2 company produces.
With respect to Distributed Feedback Laser, the advantage of direct regulating outside cavity laser comprises: the chamber is longer, thereby can obtain very narrow live width; It is littler to warble under the situation of directly modulation; Because the chamber is passive, more insensitive to the light feedback, increased the stability of device; Since the design simplification of this direct regulating outside cavity laser the manufacturing process of laser, make the rate of finished products of laser improve.In addition, just can realize long Distance Transmission owing to need not electroabsorption modulator, thereby direct regulating outside cavity laser there is relatively the laser of electroabsorption modulator also bigger Output optical power can be arranged.
Direct regulating outside cavity laser is different with the structure of Distributed Feedback Laser.Direct regulating outside cavity laser mainly comprises semiconductor laser and the grating that plates anti-reflection film, selects emission wavelength in the chamber by fiber grating is inserted into, and makes laser works on the pattern by the decision of the grating in the exocoel.Distributed Feedback Laser is to rely on the reflection at each ripple peak in the diffraction grating that laser diode light-emitting area surface engraves to feed back, grating has also strengthened the frequency-selecting effect of resonant cavity in addition, to guarantee only to form a frequency in the laser, single mode output is accomplished in a kind of light generation of pattern.
Between the operation wavelength of laser and the die temperature of laser confidential relation is arranged.Because the structure difference, the wavelength of direct regulating outside cavity laser is different with relation property and Distributed Feedback Laser between the die temperature.Relation between the wavelength of Distributed Feedback Laser and the laser tube core temperature almost is linear, and as shown in Figure 1, when the output light of Distributed Feedback Laser was nominal wavelength λ, corresponding had unique laser tube core temperature T; And the relation of the wavelength of direct regulating outside cavity laser and die temperature is non-linear, and it may be issued to same wavelength in the different situation of laser tube core temperature, as shown in Figure 2.When direct regulating outside cavity laser output light wavelength was nominal wavelength λ among Fig. 2, corresponding laser tube core temperature T 1 was correct die temperature, and the live width of laser works its output light when this die temperature is little, and the transmission performance of laser is good; T2 then is wrong die temperature, and the live width of laser works its output light when this die temperature is big, the transmission performance variation of laser.Therefore use direct regulating outside cavity laser must notice guaranteeing that laser works is at correct die temperature point.
The working point adjustment process of Distributed Feedback Laser mainly may further comprise the steps generally as shown in Figure 3:
1, adjust the size of the Output optical power of laser, the Output optical power value that makes laser is the nominal Output optical power;
2, adjust the die temperature of laser, make laser output light wavelength reach nominal wavelength;
3, adjust the extinction ratio parameter of laser, make it meet index request;
Because the wavelength of direct regulating outside cavity laser and the nonlinear characteristic between the die temperature, when using direct regulating outside cavity laser, not only need it is adjusted to suitable bias current working point and modulated current working point, also need it is adjusted to the pairing correct die temperature of nominal output wavelength, just can make laser reach good transmission performance.
Laser works point shown in Figure 3 is adjusted flow process be directly used in direct regulating outside cavity laser, when the output light wavelength that can't guarantee direct regulating outside cavity laser was nominal wavelength, its die temperature also was in correct temperature spot.Therefore, the new part that flow process must need to add its characteristics of adaptation is adjusted in the working point of direct regulating outside cavity laser.
Summary of the invention
The object of the present invention is to provide a kind of Work station regulation means and adjusting device of direct regulating outside cavity laser, when the Work station regulation means of the existing Distributed Feedback Laser of solution is directly used in direct regulating outside cavity laser, when the output light wavelength that can't guarantee direct regulating outside cavity laser is nominal wavelength, its die temperature also is in the technical problem of correct temperature spot, can guarantee that direct regulating outside cavity laser is operated in correct die temperature, effectively brings into play the advantage of direct regulating outside cavity laser.
For achieving the above object, technical scheme of the present invention is:
A kind of Work station regulation means of direct regulating outside cavity laser is characterized in that this method comprises the steps (as shown in Figure 4):
A adjusts the size of the Output optical power of direct regulating outside cavity laser, and the Output optical power value that makes laser is the nominal Output optical power;
B adjusts the die temperature of laser, makes laser output light wavelength reach nominal wavelength;
F adjusts the extinction ratio parameter of laser;
It is characterized in that comprising between step B and the F further adjustment for die temperature:
The value of the pairing adjustment amount of die temperature when C recording step B medium wavelength reaches nominal wavelength;
D checks whether the die temperature of laser among the step C is correct, continues folk prescription when turning down the die temperature of laser, if wavelength change is linear, then the die temperature among the step C is correct, otherwise, incorrect;
If the die temperature of E laser is correct, then return to the die temperature of step C, change step F; If the die temperature mistake of laser is then got back to step B.
This folk prescription is to make the laser tube core temperature reduce more than 5 degree to the die temperature of adjusting laser.
A kind of adjusting device of method as mentioned above of realizing is characterized in that the circuit basic structure of this device comprises (as shown in Figure 5):
One direct regulating outside cavity laser, its inside also comprise thermistor, TEC (thermoelectric refrigerating unit) and test section backlight except that laser;
One provides the drive circuit for laser of bias current and modulated current for above-mentioned direct regulating outside cavity laser;
One ATC (automatic temperature-adjusting control circuit), this ATC constitutes feedback loop with the thermistor and the TEC of laser inside, with the die temperature of control laser, thereby makes laser output light wavelength stable;
One APC (automatic power control circuitry), this APC constitutes feedback loop with the bias current output of test section backlight and drive circuit for laser, makes the luminous power of laser output light keep stable.
This ATC is made up of thermistor resistance testing circuit, TEC current driving circuit, laser tube core temperature-control circuit; And constitute feedback loop with the thermistor and the TEC of laser inside.
This APC is made up of laser Output optical power testing circuit, bias current control circuit; And constitute feedback loop with the bias current output of test section backlight and drive circuit for laser.
This drive circuit for laser comprises laser driving chip, contains the modulated current control circuit of potentiometer, adjusts the modulated current size of driver output by the value of adjusting potentiometer.
Have a micro-control unit in this device, link to each other with drive circuit for laser, ATC, automatic road control circuit respectively, this micro-control unit is made up of microprocessor, performance testing circuit and serial communication interface.
Adopt directly modulated lasers method of adjustment of the present invention and device, compared with prior art, because at the die temperature of direct regulating outside cavity laser and the relation property of wavelength, provided relevant set-up procedure, can avoid the working point adjustment of direct regulating outside cavity laser deviation to occur, thereby guaranteed its transmission performance, using on optical transmission system for it provides reliable assurance.
Description of drawings
Fig. 1 is the output light wavelength of Distributed Feedback Laser and the relation curve between the die temperature;
Fig. 2 is the output light wavelength of direct regulating outside cavity laser and the relation curve between the die temperature;
Fig. 3 is a Distributed Feedback Laser working point adjustment process schematic diagram;
Fig. 4 is a direct regulating outside cavity laser working point adjustment process schematic diagram among the present invention;
Fig. 5 is that the circuit hardware structured flowchart is adjusted in the direct regulating outside cavity laser working point among the present invention;
Fig. 6 is the hardware block diagram of the embodiment of the invention 1;
Fig. 7 is the hardware block diagram of the embodiment of the invention 2.
Embodiment
Below further introduce the inventive method and device by 2 embodiment.
Embodiment 1
See also Fig. 6, it is the hardware block diagram of embodiment 1 of the working point adjusting device of direct regulating outside cavity laser of the present invention.As shown in the figure: it mainly comprises direct regulating outside cavity laser, automatic temperature-adjusting control loop, automated power control loop and extinction ratio control circuit.Wherein:
Direct regulating outside cavity laser, its inside also comprise thermistor, TEC (thermoelectric refrigerating unit) and test section backlight except that laser.
This automatic temperature-adjusting control circuit: form, and constitute feedback loop with the thermistor and the TEC of laser inside by thermistor resistance testing circuit, TEC current driving circuit, laser tube core temperature-control circuit institutes such as (containing potentiometer RP1).
This automatic power control circuitry: form by laser Output optical power testing circuit, bias current control circuit (containing potentiometer RP2) etc., and constitute feedback loop with the bias current output of test section backlight and laser driving chip.
This extinction ratio control circuit: the modulated current output by modulated current control circuit (containing potentiometer RP3) and laser driving chip is formed, and adjusts the modulated current size of driver output by the value of adjusting RP3.
Based on the apparatus structure among Fig. 6, the working point set-up procedure of direct regulating outside cavity laser is as follows:
1, adjusts potentiometer RP2, make to make the laser Output optical power reach the Output optical power of nominal by the suitable bias current of chip for driving output.
2, adjust potentiometer RP1, make laser output light wavelength reach nominal wavelength.
3, the value of record RP1 adjustment at this moment.
4, whether the wavelength working point of checking previous step laser is correct, and promptly whether the die temperature of laser is correct.Be folk prescription to continuing to adjust RP1, make the laser tube core temperature reduce more than 5 degree, whether the output wavelength of observing laser simultaneously is dull moves to short wavelength's direction.
Move to short wavelength's direction if the observed result of 5 steps 4 is output wavelength dullnesses of laser, show that then the wavelength working point is correct, adjust back potentiometer RP1 to the value that is write down before this this moment in the other direction; Otherwise readjust the wavelength working point of laser and get back to step 3.
6, adjust potentiometer RP3, make the extinction ratio parameter of laser reach requirement.
Embodiment 2
See also Fig. 7 again, it is the hardware block diagram of embodiment 2 of the working point adjusting device of direct regulating outside cavity laser of the present invention.As shown in the figure: it mainly comprises direct regulating outside cavity laser, automatic temperature-adjusting control loop, automated power control loop and extinction ratio control circuit.Wherein:
Direct regulating outside cavity laser, its inside also comprise thermistor, TEC (thermoelectric refrigerating unit) and test section backlight except that laser.
Automatic temperature-adjusting control circuit: form, and constitute feedback loop with the thermistor and the TEC of laser inside by thermistor resistance testing circuit, TEC current driving circuit, laser tube core temperature-control circuit institutes such as (containing potentiometer RA3).
Automatic power control circuitry: form by laser Output optical power testing circuit, bias current control circuit (containing potentiometer RA1) etc., and constitute feedback loop with the bias current output of test section backlight and laser driving chip.
The extinction ratio control circuit: the modulated current output by modulated current control circuit (containing potentiometer RA2) and laser driving chip is formed, and adjusts the modulated current size of laser driving chip output by the value of adjusting RA2.
Micro-control unit: form by MCU (microprocessor), performance testing circuit and serial communication interface etc., be used to adjust digital regulation resistance and acceptance energy detection signal etc.
Based on the apparatus structure among Fig. 7, the working point set-up procedure of direct regulating outside cavity laser is as follows:
1, adjusts potentiometer RA1 by MCU, make to make laser works in suitable bias current working point by the suitable bias current of automatic power control circuitry output.
2, adjust potentiometer RA3 by MCU, make laser output light wavelength reach nominal wavelength.
3, MCU writes down the value of the RA3 adjustment of this moment automatically, and trafficability characteristic energy testing circuit obtains the size of the die temperature Ts of laser this moment, and writes down this numerical value.
4, whether the wavelength working point of checking previous step laser is correct, and promptly whether the die temperature of laser is correct.Concrete grammar is, MCU adjusts to continuing digital regulation resistance RA3 folk prescription, makes the laser tube core temperature reduce more than 5 degree, and whether the output wavelength of observing laser simultaneously is dull moves to short wavelength's direction.
Move to short wavelength's direction if the observed result of 5 steps 4 is output wavelength dullnesses of laser, show that then the wavelength working point is correct, issue wavelength by host computer and select correct order, then MCU value that potentiometer RA3 is automatically restored to before this to be write down; Otherwise issue wavelength by host computer and select bad command, RA3 keeps current record value, begins to continue folk prescription to the wavelength working point of adjusting laser, makes laser output wavelength reach nominal value, and gets back to step 3.
6, adjust potentiometer RA2, make the extinction ratio parameter of laser reach requirement.
Certainly, embodiment 1 also can increase the micro-control unit with reference to embodiment 2.
Being preferred embodiment of the present invention only in sum, is not to be used for limiting practical range of the present invention.Be that all equivalences of doing according to the content of the present patent application claim change and modification, all should be technology category of the present invention.
Claims (7)
1. the Work station regulation means of a direct regulating outside cavity laser, this method comprises the steps:
A adjusts the size of the Output optical power of direct regulating outside cavity laser, and the Output optical power value that makes laser is the nominal Output optical power;
B adjusts the die temperature of laser, makes laser output light wavelength reach nominal wavelength;
F adjusts the extinction ratio parameter of laser;
It is characterized in that comprising between step B and the F further adjustment for die temperature:
The value of the pairing adjustment amount of die temperature when C recording step B medium wavelength reaches nominal wavelength;
D checks whether the die temperature of laser among the step C is correct, continues folk prescription when turning down the die temperature of laser, if wavelength change is linear, then the die temperature among the step C is correct, otherwise, incorrect;
If the die temperature of E laser is correct, then return to the die temperature of step C, change step F; If the die temperature mistake of laser is then got back to step B.
2. the Work station regulation means of direct regulating outside cavity laser according to claim 1 is characterized in that folk prescription is to make the laser tube core temperature reduce more than 5 degree to the die temperature of adjusting laser.
3. realize the adjusting device of method as claimed in claim 1 or 2 for one kind, it is characterized in that the circuit basic structure of this device comprises:
One direct regulating outside cavity laser, its inside also comprise thermistor, thermoelectric refrigerating unit and test section backlight except that laser;
One provides the drive circuit for laser of bias current and modulated current for above-mentioned direct regulating outside cavity laser;
One automatic temperature-adjusting control circuit, this automatic temperature-adjusting control circuit constitutes feedback loop with the thermistor and the thermoelectric refrigerating unit of laser inside, with the die temperature of control laser, thereby makes laser output light wavelength stable;
One automatic power control circuitry, this automatic power control circuitry constitutes feedback loop with the bias current output of test section backlight and drive circuit for laser, makes the luminous power of laser output light keep stable.
4. the working point adjusting device of direct regulating outside cavity laser according to claim 3 is characterized in that this automatic temperature-adjusting control circuit is made up of thermistor resistance testing circuit, thermoelectric refrigerating unit current driving circuit, laser tube core temperature-control circuit; And constitute feedback loop with the thermistor and the thermoelectric refrigerating unit of laser inside.
5. the working point adjusting device of direct regulating outside cavity laser according to claim 3 is characterized in that this automatic power control circuitry is made up of laser Output optical power testing circuit, bias current control circuit; And constitute feedback loop with the bias current output of test section backlight and drive circuit for laser.
6. the working point adjusting device of direct regulating outside cavity laser according to claim 3, it is characterized in that this drive circuit for laser comprises laser driving chip, contains the modulated current control circuit of potentiometer, adjusts the modulated current size of driver output by the value of adjusting potentiometer.
7. according to the working point adjusting device of claim 3 or 4 or 5 or 6 described direct regulating outside cavity lasers, it is characterized in that having a micro-control unit in this device, link to each other with drive circuit for laser, automatic temperature-adjusting control circuit, automatic road control circuit respectively, this micro-control unit is made up of microprocessor, performance testing circuit and serial communication interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100308751A CN100502175C (en) | 2006-09-06 | 2006-09-06 | Work station regulation means of direct regulating outside cavity laser and adjusting apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100308751A CN100502175C (en) | 2006-09-06 | 2006-09-06 | Work station regulation means of direct regulating outside cavity laser and adjusting apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101141047A true CN101141047A (en) | 2008-03-12 |
| CN100502175C CN100502175C (en) | 2009-06-17 |
Family
ID=39192849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100308751A Expired - Fee Related CN100502175C (en) | 2006-09-06 | 2006-09-06 | Work station regulation means of direct regulating outside cavity laser and adjusting apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100502175C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102801105A (en) * | 2012-08-09 | 2012-11-28 | 无锡沃浦光电传感科技有限公司 | Package of quantum cascade laser with thermoelectric refrigerator |
| CN106253988A (en) * | 2013-05-24 | 2016-12-21 | 青岛海信宽带多媒体技术有限公司 | Optical module and operating temperature control method thereof |
| CN107332624A (en) * | 2017-06-20 | 2017-11-07 | 武汉光迅科技股份有限公司 | A kind of DML devices for completing linear modulation mode |
| CN109714108A (en) * | 2018-10-08 | 2019-05-03 | 杭州万隆光电设备股份有限公司 | Uplink burst optical sender with thermostatic control Wavelength tunable |
| CN110653500A (en) * | 2018-06-29 | 2020-01-07 | 维亚机械株式会社 | Laser processing device and laser processing method |
| CN113050403A (en) * | 2021-03-22 | 2021-06-29 | 湖北科技学院 | Low-microwave-power miniature CPT atomic clock light source generation device and method |
-
2006
- 2006-09-06 CN CNB2006100308751A patent/CN100502175C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102801105A (en) * | 2012-08-09 | 2012-11-28 | 无锡沃浦光电传感科技有限公司 | Package of quantum cascade laser with thermoelectric refrigerator |
| CN106253988A (en) * | 2013-05-24 | 2016-12-21 | 青岛海信宽带多媒体技术有限公司 | Optical module and operating temperature control method thereof |
| CN106253988B (en) * | 2013-05-24 | 2019-02-12 | 青岛海信宽带多媒体技术有限公司 | Optical module and its operating temperature adjusting method |
| CN107332624A (en) * | 2017-06-20 | 2017-11-07 | 武汉光迅科技股份有限公司 | A kind of DML devices for completing linear modulation mode |
| CN107332624B (en) * | 2017-06-20 | 2019-09-10 | 武汉光迅科技股份有限公司 | A kind of DML device of achievable linear modulation mode |
| CN110653500A (en) * | 2018-06-29 | 2020-01-07 | 维亚机械株式会社 | Laser processing device and laser processing method |
| CN109714108A (en) * | 2018-10-08 | 2019-05-03 | 杭州万隆光电设备股份有限公司 | Uplink burst optical sender with thermostatic control Wavelength tunable |
| CN113050403A (en) * | 2021-03-22 | 2021-06-29 | 湖北科技学院 | Low-microwave-power miniature CPT atomic clock light source generation device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100502175C (en) | 2009-06-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100502175C (en) | Work station regulation means of direct regulating outside cavity laser and adjusting apparatus | |
| US6275250B1 (en) | Fiber gain medium marking system pumped or seeded by a modulated laser diode source and method of energy control | |
| JP4500374B2 (en) | Laser marking system and energy control method | |
| CN102171896B (en) | Optical amplification controller, method for controlling semiconductor optical amplifier, and optical transmitter | |
| US6363097B1 (en) | Semiconductor laser with a rewritable wavelength stabilizer | |
| CN1174577C (en) | Producing laser light of different wavelengths | |
| US6590915B1 (en) | Optical apparatus and method for producing the same | |
| EP0703647B1 (en) | Apparatus for suppressing stimulated Brillouin Scattering | |
| CN101405920A (en) | Wavelength tunable external cavity laser | |
| WO2002097934A3 (en) | Wavelenth-tunable vertical cavity surface emitting laser and method of making same | |
| US10074959B2 (en) | Modulated laser source and methods of its fabrication and operation | |
| JP2019121691A (en) | Integrated laser light source and optical transceiver using the same | |
| US6826212B2 (en) | Module for optical communications | |
| US20130322472A1 (en) | Wavelength selective and tunable laser device | |
| US9042415B2 (en) | Method to tune emission wavelength of semiconductor laser diode | |
| CN105511029A (en) | Optical module and laser wavelength shift adjusting method and device of optical module | |
| WO2018165139A1 (en) | Twdm onu wavelength control methods, system thereof and shut-off depth control circuit | |
| EP2801130A1 (en) | Pulsed fiber laser with double- pass pumping | |
| CN102983497A (en) | Laser backlight current feedback control method | |
| CN103888190A (en) | Optical module | |
| CN202602083U (en) | A device used for expanding low-temperature working range of a laser diode | |
| US6246511B1 (en) | Apparatus and method to compensate for optical fiber amplifier gain variation | |
| US20030169789A1 (en) | Wavelength locker and method for locking wavelengths for optical transmitters | |
| Kozodoy et al. | Thermal effects in monolithically integrated tunable laser transmitters | |
| KR20150047699A (en) | Highly Efficeient External Cavity Tunable Laser |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090617 Termination date: 20150906 |
|
| EXPY | Termination of patent right or utility model |