CN110061800A - A kind of Wavelength stabilized system of tunable DWDM wavelength optical node - Google Patents
A kind of Wavelength stabilized system of tunable DWDM wavelength optical node Download PDFInfo
- Publication number
- CN110061800A CN110061800A CN201910312830.0A CN201910312830A CN110061800A CN 110061800 A CN110061800 A CN 110061800A CN 201910312830 A CN201910312830 A CN 201910312830A CN 110061800 A CN110061800 A CN 110061800A
- Authority
- CN
- China
- Prior art keywords
- wavelength
- laser
- control
- temperature
- value
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0201—Add-and-drop multiplexing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0201—Add-and-drop multiplexing
- H04J14/0202—Arrangements therefor
- H04J14/0213—Groups of channels or wave bands arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Semiconductor Lasers (AREA)
Abstract
The invention discloses a kind of Wavelength stabilized system of tunable DWDM wavelength optical node, including wavelength-selective switches, laser tube control circuit, laser tube is connected in laser tube control circuit；Wavelength-selective switches connect microprocessor, the D/A converting circuit controlled is connected with according to the selected DWDM wavelength of wavelength-selective switches on microprocessor, for acquiring the thermistor of laser tube temperature, thermistor is built in laser and contacts setting with laser tube, thermistor, the accurate operational amplifier circuit connection that D/A converting circuit is compared with to sampling voltage and analog voltage, accurate operational amplifier circuit connects refrigerator control circuit, refrigerator control circuit connects semiconductor cooler, semiconductor cooler is built in laser and contacts setting with laser tube, refrigerator control circuit controls supply current size according to the comparison result of accurate operational amplifier circuit and the direction that powers makes semiconductor cooler carry out heating or refrigeration work to make the temperature of laser device laser pipe stablize in setting value.
Description
Technical field
The invention belongs to cable television fields, and in particular to a kind of Wavelength stabilized system of tunable DWDM wavelength optical node
System.
Background technique
With the growth of network bandwidth requirements increasingly, optical node increasing number used in network is dry to eliminate photo-beat frequency
(OBI) is disturbed, dense wave division multipurpose (DWDM) technology can be used, optical node returns the Wavelength design of optical signal at tunable, adopts
OBI noise problem is solved with the optical node of different passback optical wavelength.More at present is using coaxial type TOSA laser and outer
Electronic refrigerator, the thermistor set carry out the control of electronic refrigerator using operational amplifier circuit, realize laser output wavelength tune
Humorous function.But this scheme works are not ideal enough, and the stability of output optical signal wavelength is bad, and output wavelength has 0.1~
The fluctuation range of 0.3nm, optical node is in actual use or can generate photo-beat frequency interferes.If the wavelength tune encapsulated using butterfly
The price is very expensive for humorous DFB laser, can not use on the very big user terminal RFoG optical node of demand.
Summary of the invention
In order to overcome the deficiencies in the prior art, i.e., wavelength stability is still not enough managed when external in view of current refrigeration device
The situation thought, the invention reside in provide a kind of OBI that can effectively solve Bidirectional HFC Network return path (photo-beat frequency interferes)
Noise problem, while reducing the Wavelength stabilized method of the tunable DWDM wavelength optical node of expenditure cost, by by coaxial type
Built in the semiconductor cooler and thermistor of TOSA laser carry out, believed by relevant control circuit and software control output light
The precision of number wavelength, wavelength stability can achieve the high-precision of 0.001nm.
The technical solution adopted by the present invention is that:
A kind of Wavelength stabilized system of tunable DWDM wavelength optical node, applied to the RFoG optical node of wavelength tuning,
It is installed on user terminal, including wavelength-selective switches, laser tube control circuit, it is characterised in that: in the laser tube control circuit
It is connected with the laser tube that specified optical power is exported after being controlled by it bias current；The wavelength-selective switches connect micro process
Device, the D/A converting circuit that the DWDM wavelength selected according to wavelength-selective switches is connected on the microprocessor to control are used
In the thermistor for acquiring the laser tube temperature, the thermistor is built in laser and contacts setting with the laser tube,
The accurate operational amplifier circuit connection that the thermistor, D/A converting circuit are compared with to sampling voltage and analog voltage,
The precision operational amplifier circuit connection refrigerator control circuit, the refrigerator control circuit connection semiconductor cooler, described half
Conductor refrigerator is built in laser and contacts setting with the laser tube, and the refrigerator control circuit is according to accurate operational amplifier circuit
Comparison result control supply current size and power supply direction so that semiconductor cooler is carried out heating or refrigeration work to making to swash
The temperature of light device laser tube is stablized in setting value.The present invention uses the laser of built-in refrigerator and thermistor, passes through digital-to-analogue
Conversion circuit, accurate amplifier control circuit, semiconductor refrigerator control circuit and microprocessor control software, and optical wavelength can
Stability contorting realizes the tunable function of the optical wavelength of complete machine in the wave-length coverage of needs, and wavelength stability reaches 0.001nm's
In high precision.
Further, the digital-to-analogue chip that the D/A converting circuit uses is the AD5647R of AD company, the U.S..
Further, the output channel of the digital-to-analogue chip is provided with the control voltage value for corresponding to 16 wavelength and 1 initial
The voltage value of wavelength, with laser built in thermistor sampling voltage be compared after, output phase answers controlling value to control
The refrigeration electric current or heating electric current of semiconductor cooler, make laser tube operating temperature reach desired value, and then obtain the tune needed
Humorous optical wavelength.
Further, steps are as follows for the calculating of the controlling value of the control voltage value and respective wavelength of 16 wavelength:
(1) the output channel A for presetting the voltage value Va00 logarithmic mode chip of 1 initial wavelength carries out basic test, passes through
Control the voltage value of the output channel A of software adjustment digital-to-analogue chip；
The control voltage value Va00=1.5*Rb/ (Rb+10) 1 of wavelength)
Laser thermosensitive resistance when wherein Rb is laser producer provide 25 DEG C；
(2) it after adjusting, carries out minimum dial position and is arranged and saves to each dial position of highest dial position；
(3) each dial position inputs corresponding wavelength, calculates the control voltage of 16 wavelength automatically in conjunction with k-factor and Rb value
Value Va01~Va16；
(4) calculating and preservation of the controlling value of each wavelength are carried out；
The calculating process of each controlling value Daxx is as follows:
RL=10*Va01/ (1.5-Va01) 2)
TL=1/ (LN (RL/10)/3930+1/298.15) -273.15 3)
Txx=∑ (2.5/ (§ xx))+TL 4)
Rtxx=10*Exp (3900* (1/ (Txx+273.15)-1/298.15)) 5)
Daxx=4096*Rtxx/(Rtxx+10) 6)
Laser thermistor when wherein RL is lowest wavelength；Laser temperature when TL is lowest wavelength, by laser
Thermistor calculating obtains；TxxIt is the laser temperature for indicating each wavelength, xx=2~16, lowest wavelength is the 1st wavelength, and 2 are
2nd wavelength, and so on；§ xx is temperature wavelength change rate parameter, this parameter can be configured by menu；RtxxIt is to indicate
Laser thermosensitive resistance when each wavelength, xx=2~16；DaxxIt is to indicate that the A channel control voltage of each wavelength dial position shelves is converted into
DA value, xx=2~16；LN is the logarithm using e the bottom of as.
Further, the mode of the Wavelength stabilized control of the laser is to first pass through a transition when laser is opened
Phase is then smoothly adjusted to control voltage the control voltage of current dial position, allows laser works in the setting temperature of the dial position
Degree, the output wavelength of laser is exactly the wavelength for setting dial position at this time, instant work temperature of the timing to laser in the course of work
Degree is sampled, the corresponding voltage value of Current Temperatures for calculating laser according to sampled value, the control of the voltage value and the dial position
Voltage value processed is made comparisons, if the two is consistent, laser stabilization works in the temperature of current dial position, if occurring current sharp
The corresponding voltage value of the temperature of light device deviates the control voltage value 0.1V or more of the dial position, then the output wavelength of laser is inclined
From setting value, laser is at this moment closed, after spending 20 seconds, laser is restarted, makes laser works in next dial position, with such
It pushes away, until can stablize in corresponding dial position shelves.The present invention is obtained by testing the wavelength characteristic that laser tube exports not
Wavelength change rule under synthermal, and according to the variation of its thermosensitive resistance, relatively accurate voltage control and compensation are carried out,
Guarantee the realization of stable tuning wavelength.
Further, the precision operational-amplifier of the accurate amplifier control circuit is using Maxim company, the U.S.
MAX4238.The present invention is carried out in accurate amplifier control circuit by voltage value to precision operational-amplifier and loop gain
Test and calculating, according to the thermistor performance of laser, laser wavelength varies with temperature parameter, chooses suitable feedback
Value, while ground ring protection is carried out to the signal wire of amplifier and realizes good control precision to improve signal cleanliness.
Further, the driving chip in the refrigerator control circuit uses the MAX8521E of U.S. Maxim company.This
The accurate amplifier control circuit and D/A converting circuit for inventing refrigerator control circuit cooperation periphery, select excellent correlation
Component, making rational planning for and being laid out by circuit, the Optimization Debugging of circuit parameter realize the cooling and warming of semiconductor cooler
Control, makes laser in the wavelength-stabilized operation of needs.
Beneficial effects of the present invention:
1, using the tunable DWDM RFoG optical node of wavelength stabilizing technique, output optical signal wavelength can be at 16 not
It is continuously adjusted in DWDM wave-length coverage, it can be with using the Wavelength stabilized RFoG optical node of multiple DWDM in cable TV network
Efficiently solve OBI (photo-beat frequency interferes) noise problem of Bidirectional HFC Network return path.
2, cable television operators can satisfy to complete using the optical node of wavelength stabilizing technique solution development of the invention
To the demand of seamless evolution and reduction operation expenditure in fiber optic network architecture evolution process, there is stronger market competition
Power, good market prospect.
Detailed description of the invention
Fig. 1 is system structure diagram of the invention.
Fig. 2 is the pin arrangement schematic diagram after built-in refrigerator and thermistor of the invention.
Fig. 3 is the wavelength setting procedure figure of laser of the invention.
Fig. 4 is the stability contorting flow chart of laser of the invention.
Fig. 5 is that the control voltage value of each dial position of the invention and the input DA value of corresponding control chip correspond to table.
Specific embodiment
Next combined with specific embodiments below invention is further explained, but does not limit the invention to these tools
Body embodiment.One skilled in the art would recognize that present invention encompasses may include in Claims scope
All alternatives, improvement project and equivalent scheme.
Referring to Fig. 1, a kind of wavelength stabilizing technique of tunable DWDM wavelength optical node, the RFoG light applied to wavelength tuning
Node is installed on user terminal, including wavelength-selective switches 1, and the wavelength-selective switches 1 connect microprocessor 2, described micro-
Processor 2 removes control D/A converting circuit 3 according to the DWDM wavelength that wavelength-selective switches 1 are selected, and the D/A converting circuit 3 connects
Accurate operational amplifier circuit 4 is connect, analog signal is amplified, the precision operational amplifier circuit 4 connects refrigerator control circuit 5, described
Refrigerator control circuit 5 connects semiconductor cooler 6, makes semiconductor cooler by control supply current size and power supply direction
Carry out heating or refrigeration work.Laser tube control circuit 8 controls the bias current of laser tube 9, so that laser tube 9 exports
Specified optical power.The semiconductor cooler 6 and the laser tube 9 are in close contact, i.e., semiconductor cooler 6 is built in laser
In device, thermistor 7 is also in close contact with the laser tube 9, i.e., thermistor 7 is built in laser, described for acquiring
The temperature of laser tube, the microprocessor 2 determines the operating temperature of laser according to the sampled value of the thermistor 7, and leads to
It crosses 5 supply current of refrigerator control circuit and supplier of electricity always realizes control to 9 output wavelength of laser tube.The thermistor
The 7 connections accurate operational amplifier circuit 4, is compared by accurate amplifier, is setting the temperature stabilization of laser device laser pipe 9
Value.
The tunable function of realizing wavelength, needs to carry out the control of output light wavelength.Realization principle is: microprocessor 2
Output control signal, by digital-to-analogue conversion be analog voltage signal, with laser built in thermistor 7 sampling voltage, pass through
Accurate operational amplifier circuit 4 is compared, and makes the driving chip of refrigerator control circuit 5 according to half built in setting value driving laser
Conductor refrigerator 6 realizes refrigerator working state control, stablizes laser device laser tube temperature degree in setting value.Turned by digital-to-analogue
It changes circuit 3, accurate operational amplifier circuit 4, refrigerator control circuit 54 and microprocessor 2 and controls software realization output optical signal wavelength
Stability contorting realizes the tunable function of the optical wavelength of complete machine in the range of needs.The laser tube embedded semiconductor of the present embodiment
Fig. 2 is shown in pin arrangement after refrigerator and thermistor.
The present embodiment is in the design of D/A converting circuit 3, and the digital-to-analogue chip used is the AD5647R of AD company, the U.S..Ginseng
The wavelength interval DWDM standard of ITU-T G.962 is examined, in conjunction with laser performance feature, considers that every 0.25nm is an interval, adopts
With the wavelength variation range of 3.75nm, wave-length coverage is 1610 ± 10nm, and one shares 16 tunable wavelength control points, setting 16
A wavelength dial position.It (is then 17 plus 1 initial wavelength voltage that the output channel of AD5647R, which needs to be arranged 16 voltage values, in this way
A voltage value), so as to laser built in the sampling voltage of thermistor be compared, control refrigeration electric current (or heating electricity
Stream), make laser tube work in required temperature, and then obtain corresponding tuning optical wavelength.Pass through the wave exported to laser tube
Long characteristic is tested, and wavelength change rule at different temperatures is obtained, and according to the variation of its thermosensitive resistance, carries out phase
Accurate voltage is controlled and is compensated, guarantees the realization of stable tuning wavelength.
The present embodiment is in accurate operational amplifier circuit 4, and the accurate amplifier used is the MAX4238 of Maxim company, the U.S..It is logical
It crosses and the voltage value and loop gain of precision operational-amplifier is tested and calculated, then according to the thermistor of laser
Can, laser wavelength varies with temperature parameter, suitable value of feedback is chosen, while ground ring protection is carried out to the signal wire of amplifier,
To improve signal cleanliness, good control precision is realized.
The heat dissipation of semiconductor cooler will directly influence temperature control effect, especially in cooling mode.So nothing
By being built-in refrigerator or external refrigerator, the heat dissipation of laser is the key factor of complete machine optical wavelength tuning and stability,
It is larger to the test of refrigerating capacity especially when operating ambient temperature is relatively high, it is necessary to carry out the good heat radiating of refrigerator.And
The heat dissipation technique of refrigerator needs complete machine to provide outside the radiating block of larger area, is designed using built-in refrigerator, and refrigerator
Good heat dissipation effect should can be just played in this way close to the core laser tube of laser, obtain the refrigerator performance of laser
It is promoted to effective, to obtain the stable light operation wavelength of performance and Output optical power, realizes the harmonious steady operation of Wavelength tunable.
In addition, for the accurate test for realizing laser temperature, so that the precision for temperature and wavelength control amount provides reliably
Reasonable test volume, needs in laser design that high-performance thermistor is as far as possible close to laser device laser pipe position, to protect
The signal-to-noise ratio Optimality of laser is demonstrate,proved, echo interference is reduced, needs to integrate suitable optoisolator in structure design；To reduce
Optical coupling loss.
Driving chip in refrigerator control circuit 5 uses the MAX8521E of U.S. Maxim company, cooperation digital-to-analogue conversion electricity
Road and accurate operational amplifier circuit realize the refrigeration or heating control of semiconductor cooler, make laser in the Wavelength stabilized work of needs
Make.
The test of semiconductor refrigerator control circuit carries out the system of built-in refrigerator laser and external refrigerator laser
Refrigeration heat performance comparison, investigates relevant refrigerating efficiency and accurate amplifier controls precision.When using external refrigerator laser,
When can not achieve control precision due to accurate amplifier control mode, the progress of digital-to-analogue chip combination microprocessor software has been directlyed adopt
The temperature of electronic refrigerator controls, and carries out relevant software test and adjusting, but still ideal wavelength stability is not achieved
Control.So present invention employs the laser of embedded semiconductor refrigerator 6, since the response speed of built-in thermistor 7 is non-
It is often fast, it is considered as accurate operational amplifier circuit 4 and is controlled, it is substantially synchronous with responding for thermistor due to controlling, at this time
By the test repeatedly and adjusting of associated control software, accurate amplifier control mode can realize control precision very well, and wavelength is steady
The qualitative high-precision that can achieve 0.001nm.
The wavelength control basic principle of tunable laser is the variation of the wavelength with temperature of laser and changes.It controls soft
Part realizes the steady of optical wavelength and optical power by controlling temperature and the technologies such as relevant optical wavelength temperature-compensating of laser
Fixed output.
The settable 16 wavelength gears of each complete machine of software set, each wavelength interval 0.25nm realize 3.75nm's altogether
Wavelength change.Then re-defining a λ 00 is initial wavelength, carries out basic test, obtains related data, and then may be implemented to control
The purpose of target wavelength processed.
Referring to Fig. 3, steps are as follows for the calculating of the controlling value of the control voltage value and respective wavelength of 16 wavelength of the present invention:
(1) the output channel A for presetting the voltage value Va00 logarithmic mode chip of 1 initial wavelength λ 00 carries out basic test, leads to
Cross the voltage value of the output channel A of control software adjustment digital-to-analogue chip；
The control voltage value Va00=1.5*Rb/ (Rb+10) 1 of wavelength)
Laser thermosensitive resistance (generally 10k Ω) when wherein Rb is laser producer provide 25 DEG C；
(2) it after adjusting, carries out minimum dial position and is arranged and saves to each dial position of highest dial position；
(3) each dial position inputs corresponding wavelength, calculates the control voltage of 16 wavelength automatically in conjunction with k-factor and Rb value
Value Va01~Va16；Definition K is change in resistance coefficient (generally 3900) of the thermistor in temperature change.
(4) calculating and preservation of the controlling value of each wavelength are carried out；
The calculating process of each controlling value Daxx is as follows:
RL=10*Va01/ (1.5-Va01) 2)
TL=1/ (LN (RL/10)/3930+1/298.15) -273.15 3)
Txx=∑ (2.5/ (§ xx))+TL 4)
Rtxx=10*Exp (3900* (1/ (Txx+273.15)-1/298.15)) 5)
Daxx=4096*Rtxx/(Rtxx+10) 6)
Laser thermistor when wherein RL is lowest wavelength；Laser temperature when TL is lowest wavelength, by laser
Thermistor calculating obtains；TxxIt is the laser temperature for indicating each wavelength, xx=2~16, lowest wavelength is the 1st wavelength, and 2 are
2nd wavelength, and so on；§ xx is temperature wavelength change rate parameter, this parameter can be configured by menu；RtxxIt is to indicate
Laser thermosensitive resistance when each wavelength, xx=2~16；DaxxIt is to indicate that the A channel control voltage of each wavelength dial position shelves is converted into
DA value, xx=2~16；LN is the logarithm using e the bottom of as.
By taking lowest wavelength 1609.026nm as an example, table is the control voltage value and correspondence for calculating resulting each dial position of laser
The input DA value of control chip (controlling value of i.e. each wavelength, the value are for software realization, are to control each group in principle
The voltage value of position), see Fig. 5.
Referring to fig. 4, the mode of the Wavelength stabilized control of laser described in the present embodiment is to first pass through when laser is opened
One transitional period is then smoothly adjusted to control voltage the control voltage of current dial position, allows laser works in the dial position
Set temperature, the output wavelength of laser is exactly the wavelength for setting dial position at this time, in the course of work timing be to laser
When operating temperature sampled, the corresponding voltage value of Current Temperatures that laser is calculated according to sampled value, the voltage value with should
The control voltage value of dial position is made comparisons, if the two is consistent, laser stabilization works in the temperature of current dial position, if going out
The corresponding voltage value of temperature of existing current lasers deviates the control voltage value 0.1V or more of the dial position, then the output wave of laser
Length has had deviated from setting value, at this moment closes laser, after spending 20 seconds, restarts laser, makes laser works at next group
Position, and so on, until can stablize in corresponding dial position shelves.The present invention is by surveying the wavelength characteristic that laser tube exports
Examination obtains wavelength change rule at different temperatures, and according to the variation of its thermosensitive resistance, carries out relatively accurate voltage
Control and compensation, guarantee the realization of stable tuning wavelength.Wherein A channel refers to the A channel of AD5627R in figure；Channel B refers to
The channel B of AD5627R；VAD=AD*5/1024；Counter refers to counting laser temperature sampling number；Wait shape
State refers to that laser switchs to open intermediate transition state from closing；T refers to the current operating temperature of laser, by laser
Temperature sampling voltage value is calculated.
The present invention uses the tunable DWDM RFoG optical node of wavelength stabilizing technique, and output optical signal wavelength can be 16
It is continuously adjusted in a difference DWDM wave-length coverage, it can using the Wavelength stabilized RFoG optical node of multiple DWDM in cable TV network
To efficiently solve OBI (photo-beat frequency interferes) noise problem of Bidirectional HFC Network return path.
Cable television operators can satisfy to all -fiber using the product of wavelength stabilizing technique solution development of the invention
To the demand of seamless evolution and reduction operation expenditure in network infrastructure evolution process, there is the stronger market competitiveness, city
Field prospect is preferable.
Claims (7)
1. a kind of Wavelength stabilized system of tunable DWDM wavelength optical node, applied to the RFoG optical node of wavelength tuning, peace
Loaded on user terminal, including wavelength-selective switches, laser tube control circuit, it is characterised in that: connect in the laser tube control circuit
It is connected to the laser tube that specified optical power is exported after being controlled by it bias current；The wavelength-selective switches connect microprocessor,
The D/A converting circuit controlled is connected with according to the selected DWDM wavelength of wavelength-selective switches on the microprocessor, for adopting
Collect the thermistor of the laser tube temperature, the thermistor is built in laser and contacts setting with the laser tube, described
The accurate operational amplifier circuit connection that thermistor, D/A converting circuit are compared with to sampling voltage and analog voltage, it is described
Accurate operational amplifier circuit connects refrigerator control circuit, and the refrigerator control circuit connects semiconductor cooler, the semiconductor
Refrigerator is built in laser and contacts setting with the laser tube, and the refrigerator control circuit is according to the ratio of accurate operational amplifier circuit
Relatively result control supply current size and power supply direction make semiconductor cooler carry out heating or refrigeration work to make laser
The temperature of laser tube is stablized in setting value.
2. a kind of Wavelength stabilized system of tunable DWDM wavelength optical node according to claim 1, it is characterised in that: institute
The digital-to-analogue chip that D/A converting circuit uses is stated as the AD5647R of AD company, the U.S..
3. a kind of Wavelength stabilized system of tunable DWDM wavelength optical node according to claim 2, it is characterised in that: institute
State digital-to-analogue chip output channel be provided with corresponding 16 wavelength control voltage value and 1 initial wavelength voltage value, with
After the sampling voltage of thermistor built in laser is compared, output phase answers controlling value to control the refrigeration of semiconductor cooler
Electric current or heating electric current, make laser tube operating temperature reach desired value, and then obtain the tuning optical wavelength needed.
4. a kind of Wavelength stabilized system of tunable DWDM wavelength optical node according to claim 3, it is characterised in that: 16
Steps are as follows for the calculating of the controlling value of the control voltage value and respective wavelength of a wavelength:
(1) the output channel A for presetting the voltage value Va00 logarithmic mode chip of 1 initial wavelength carries out basic test, passes through control
Software adjusts the voltage value of the output channel A of digital-to-analogue chip；
The control voltage value Va00=1.5*Rb/ (Rb+10) 1 of wavelength)
Laser thermosensitive resistance when wherein Rb is laser producer provide 25 DEG C；
(2) it after adjusting, carries out minimum dial position and is arranged and saves to each dial position of highest dial position；
(3) each dial position inputs corresponding wavelength, calculates the control voltage value of 16 wavelength automatically in conjunction with k-factor and Rb value
Va01~Va16；
(4) calculating and preservation of the controlling value of each wavelength are carried out；
The calculating process of each controlling value Daxx is as follows:
RL=10*Va01/ (1.5-Va01) 2)
TL=1/ (LN (RL/10)/3930+1/298.15) -273.15 3)
Txx=∑ (2.5/ (§ xx))+TL 4)
Rtxx=10*Exp (3900* (1/ (Txx+273.15)-1/298.15)) 5)
Daxx=4096*Rtxx/(Rtxx+10) 6)
Laser thermistor when wherein RL is lowest wavelength；Laser temperature when TL is lowest wavelength, by the temperature-sensitive of laser
Resistance calculations obtain；TxxIt is the laser temperature for indicating each wavelength, xx=2~16, lowest wavelength is the 1st wavelength, and 2 be the 2nd
A wavelength, and so on；§ xx is temperature wavelength change rate parameter, this parameter can be configured by menu；RtxxIt is to indicate each
Laser thermosensitive resistance when wavelength, xx=2~16；DaxxIt is to indicate that the A channel control voltage of each wavelength dial position shelves is converted into
DA value, xx=2~16；LN is the logarithm using e the bottom of as.
5. a kind of Wavelength stabilized system of tunable DWDM wavelength optical node according to claim 4, it is characterised in that: institute
The mode for stating the Wavelength stabilized control of laser is to first pass through a transitional period, then smoothly control when laser is opened
Voltage processed is adjusted to the control voltage of current dial position, allows laser works in the set temperature of the dial position, laser is defeated at this time
Wavelength is exactly the wavelength for setting dial position out, and timing samples the instant operating temperature of laser in the course of work, according to adopting
Sample value calculates the corresponding voltage value of Current Temperatures of laser, which makes comparisons with the control voltage value of the dial position, if
The two is consistent, then laser stabilization work is in the temperature of current dial position, if the temperature for current lasers occur is corresponding
Voltage value deviates the control voltage value 0.1V or more of the dial position, then the output wavelength of laser has had deviated from setting value, at this moment
Laser is closed, after spending 20 seconds, restarts laser, makes laser works in next dial position, and so on, until can stablize
In corresponding dial position shelves.
6. a kind of Wavelength stabilized system of tunable DWDM wavelength optical node described in any one according to claim 1~5,
Be characterized in that: the precision operational-amplifier of the precision amplifier control circuit using Maxim company, the U.S. MAX4238.
7. a kind of Wavelength stabilized system of tunable DWDM wavelength optical node described in any one according to claim 1~5,
Be characterized in that: the driving chip in the refrigerator control circuit uses the MAX8521E of U.S. Maxim company.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910312830.0A CN110061800B (en) | 2019-04-18 | 2019-04-18 | Wavelength stabilizing system of tunable DWDM wavelength optical node |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910312830.0A CN110061800B (en) | 2019-04-18 | 2019-04-18 | Wavelength stabilizing system of tunable DWDM wavelength optical node |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110061800A true CN110061800A (en) | 2019-07-26 |
| CN110061800B CN110061800B (en) | 2020-08-25 |
Family
ID=67319389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910312830.0A Active CN110061800B (en) | 2019-04-18 | 2019-04-18 | Wavelength stabilizing system of tunable DWDM wavelength optical node |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110061800B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111930162A (en) * | 2020-08-01 | 2020-11-13 | 武汉金信诺光电子有限公司 | Wavelength control circuit of optical module |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101047299A (en) * | 2006-03-31 | 2007-10-03 | 中兴通讯股份有限公司 | Wavelength control circuit for tunable laser |
| US20130070795A1 (en) * | 2011-09-16 | 2013-03-21 | Sumitomo Electric Industries, Ltd. | Method to switch emission wavelength of tunable laser diode |
| CN107069424A (en) * | 2017-06-15 | 2017-08-18 | 上海理工大学 | Distributed Feedback Laser drive device that high power low-power consumption is tunable |
| CN107394579A (en) * | 2017-07-04 | 2017-11-24 | 浙江省广电科技股份有限公司 | A kind of RFoG optical nodes of wavelength tuning |
| CN107390330A (en) * | 2017-08-31 | 2017-11-24 | 武汉光迅科技股份有限公司 | The BOSA and its temprature control method of a kind of Wavelength tunable |
| CN107623249A (en) * | 2017-09-30 | 2018-01-23 | 武汉光迅科技股份有限公司 | A kind of tunable wave length module |
| CN109412013A (en) * | 2018-11-09 | 2019-03-01 | 武汉联特科技有限公司 | A kind of tunable wave length optical module, remote wavelength switching method and locking means |
-
2019
- 2019-04-18 CN CN201910312830.0A patent/CN110061800B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101047299A (en) * | 2006-03-31 | 2007-10-03 | 中兴通讯股份有限公司 | Wavelength control circuit for tunable laser |
| US20130070795A1 (en) * | 2011-09-16 | 2013-03-21 | Sumitomo Electric Industries, Ltd. | Method to switch emission wavelength of tunable laser diode |
| CN107069424A (en) * | 2017-06-15 | 2017-08-18 | 上海理工大学 | Distributed Feedback Laser drive device that high power low-power consumption is tunable |
| CN107394579A (en) * | 2017-07-04 | 2017-11-24 | 浙江省广电科技股份有限公司 | A kind of RFoG optical nodes of wavelength tuning |
| CN107390330A (en) * | 2017-08-31 | 2017-11-24 | 武汉光迅科技股份有限公司 | The BOSA and its temprature control method of a kind of Wavelength tunable |
| CN107623249A (en) * | 2017-09-30 | 2018-01-23 | 武汉光迅科技股份有限公司 | A kind of tunable wave length module |
| CN109412013A (en) * | 2018-11-09 | 2019-03-01 | 武汉联特科技有限公司 | A kind of tunable wave length optical module, remote wavelength switching method and locking means |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111930162A (en) * | 2020-08-01 | 2020-11-13 | 武汉金信诺光电子有限公司 | Wavelength control circuit of optical module |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110061800B (en) | 2020-08-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107863676B (en) | Optical soliton crystal optical frequency comb generation system and method based on micro-ring resonant cavity | |
| US6439763B2 (en) | Variable microwave cold/warm noise source | |
| CN203950025U (en) | A kind of magnetic field measuring device based on relevant population trapping effect | |
| CN109119882A (en) | A kind of certainty soliton frequency comb generation system and method based on microcavity | |
| CN104242051B (en) | External cavity tunable laser and cavity mode locking method thereof | |
| US20160161676A1 (en) | Uncooled Operation of Microresonator Devices | |
| CN105356294A (en) | Tunable narrow linewidth semiconductor laser | |
| CN209046006U (en) | A kind of certainty soliton frequency comb generation system based on microcavity | |
| CN110061800A (en) | A kind of Wavelength stabilized system of tunable DWDM wavelength optical node | |
| CN105186282B (en) | High frequency stabilization tunable narrow-linewidth laser and application method | |
| CN100472900C (en) | Wavelength control circuit for tunable laser | |
| JP2020188463A (en) | Cryogenic high frequency resonator for surface ion trap | |
| CN112564802A (en) | Dimmable module and full-temperature wave locking method thereof | |
| CN106998205B (en) | A kind of coefficient of coup adjusts sapphire microwave source and adjusting method | |
| US9838023B2 (en) | Slow-clock calibration method and unit, clock circuit, and mobile communication terminal | |
| CN104935291B (en) | A kind of Low phase noise sapphire microwave oscillator | |
| CN112086857A (en) | Method and device for acquiring splicing position of continuously tunable laser and corresponding method and device for outputting continuously tunable laser | |
| Jelley et al. | An Operational Ruby Maser for Observations at 21 Centimeters with a 60‐Foot Radio Telescope | |
| Seal et al. | A Low Power Test Facility for SRF Thin Film Testing with High Sample Throughput Rate | |
| CN101651445A (en) | Oven controlled crystal oscillator | |
| CN115810976A (en) | Wavelength locker, tunable laser and wavelength locking control method | |
| CN106953694A (en) | A kind of airborne compact radio frequency optical sender | |
| CN106410603A (en) | Method and device for online regulation of performance parameters of semiconductor optical amplifier | |
| CN113075873A (en) | Rubidium atom small optical clock based on Kalman filtering temperature and frequency control and implementation method | |
| CN106441809B (en) | Semiconductor laser light source body optimum temperature detection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |