CN107370019B - A kind of laser diode current control system - Google Patents
A kind of laser diode current control system Download PDFInfo
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- CN107370019B CN107370019B CN201610307848.8A CN201610307848A CN107370019B CN 107370019 B CN107370019 B CN 107370019B CN 201610307848 A CN201610307848 A CN 201610307848A CN 107370019 B CN107370019 B CN 107370019B
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- current
- module
- control
- signal
- laser diode
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
Abstract
The invention belongs to magnetic resonance gyroscopes to manipulate technology, specifically disclose a kind of laser diode current control system.Module occurs including DC control signal, module occurs for AC controling signal, it further include current error detection and control module, direct current point model- following control module and laser diode module, it can be effectively reduced influence of the sampling resistor temperature coefficient to current sample precision, realize the high stability control of electric current, guarantee the control precision of DC current, improve the dynamic response bandwidth of electric current, by DC potential model- following control technology, alternating current adjustment is made not influence the control precision of DC current in the process.
Description
Technical field
The invention belongs to magnetic resonance gyroscopes to manipulate technology, and in particular to a kind of magnetic resonance gyroscope driving laser use is sharp
Optical diode current control system.
Background technique
Driving is determined with the core technology that detection laser is that magnetic resonance gyroscope manipulates spin assemblage, the height of performance
The quantum handling of magnetic resonance gyroscope.Driving laser is the driving mechanism of magnetic resonance gyroscope, passes through laser hyperpolarization
Nuclear spin assigns nuclear spin with macroscopical direction.Spin assemblage is manipulated using semiconductor laser, is needed to two pole of laser
Pipe is driven and is controlled, and realizes the laser output of selected frequency, and ensures the frequency of output laser, power stability.For drive
The control of dynamic laser, mainly controls the frequency and electric current of light source.It can be with by the control of the driving current to laser diode
Realize the power regulation of laser.The control precision of electric current directly affects the degree of regulation of driving laser power, that is, directly affects core
The measurement accuracy of magnetic resonance gyro.
Summary of the invention
The purpose of the present invention is to provide a kind of laser diode current control systems, can guarantee the steady of DC current
It is qualitative to exchange bandwidth with enough.
Technical scheme is as follows:
A kind of laser diode current control system, including module occurs for DC control signal, AC controling signal occurs
Module further includes current error detection and control module, direct current point model- following control module and laser diode module；
Two input terminals of the described current error detection and control module be separately connected DC control signal output end and
Voltage source；
The output end of module occurs for the input terminal connection AC controling signal of the DC potential model- following control module；
The output end of the current error detection and control module and the output of the DC potential model- following control module
End is connect with the input terminal of laser diode module；
DC control signal generation module transmitting direct-current control voltage signal is detected to current error and control module, simultaneously
Current error detection and control module receive the d. c. voltage signal of voltage source, and the converted DC current that obtains of two kinds of signals is believed
Number, send it to laser diode module；
Module transmitting exchange control voltage signal occurs for AC controling signal to DC potential model- following control module, by its turn
It is changed to ac current signal, after being superimposed with above-mentioned DC current signal, is sent to laser diode module.
In a kind of above-mentioned laser diode current control system: it includes output flow control that module, which occurs, for the direct current signal
The High-accuracy direct current voltage reference that voltage adjuster and output end are connect with the input terminal of output flow control voltage adjuster respectively
With input control voltage adjuster；
Wherein the signal receiving end of module, output control occur as direct current signal for the input terminal of input control voltage adjuster
The output end of module occurs as direct current signal for the output end for flowing voltage adjuster.
In a kind of above-mentioned laser diode current control system: the current error detection and control module include defeated
Enter the sequentially connected differential voltage amplifier of output end, output connects current regulator and DC current sampling module, and direct current
The input terminal of the output end connection differential voltage amplifier of sampling module is flowed, three forms closed loop；
Wherein, the current signal received is converted into voltage signal by DC current sampling module, and feedback output is to difference
Voltage amplifier, differential voltage amplifier receive DC control signal simultaneously and the control signal that module generates occur, and carry out difference
Amplification, DC current sampling module export DC current signal to laser diode simultaneously.
In a kind of above-mentioned laser diode current control system: the DC potential model- following control module, including it is defeated
Enter the sequentially connected level-one current potential model- following control of output end, second level current potential model- following control and alternating voltage current converter, and hands over
The input terminal of the output end connection level-one current potential model- following control of galvanic electricity voltage-current converter, three form closed loop；
The input terminal of alternating voltage current converter receives the exchange control that module generation occurs for AC controling signal simultaneously
Voltage signal converts thereof into current signal and is sent to laser diode module.
In a kind of above-mentioned laser diode current control system: the laser diode module, including two pole of laser
The DC current path unit and alternating current path unit of pipe and output end with the input connection of laser diode；
Wherein, the input terminal of DC current path unit and alternating current path unit has common receiving end, receives straight
The superposition of the output signal of galvanic electricity position model- following control module and current error detection and control module.
Remarkable result of the invention is:
1, DC current sampling resistor is made of precision resister array, and temperature coefficient is 1~2ppm/ DEG C, is carried out
Influence of the sampling resistor temperature coefficient to current sample precision is effectively reduced in current sample, realizes the high stability control of electric current
System.
2, design communication control signal generating module and DC potential model- following control module, are independently controlled using ac and dc current
The mode of system, that is, ensure that the control precision of DC current, and improve the dynamic response bandwidth of electric current.
3, DC potential model- following control module is designed, level-one current potential model- following control 7 therein is amplified using low noise operational
The DC potential of alternating current decanting point is carried out level-one amplification by device AD8675, and second level current potential model- following control 8 is transported using low noise
It calculates amplifier AD8675 and the DC potential of alternating current decanting point is subjected to second level amplification, alternating voltage current converter 9 will be defeated
The exchange control voltage signal entered is converted into current signal, by DC potential model- following control technology, adjusts alternating current
The control precision of DC current is not influenced in journey.
4, design current error-detecting and control module, wherein differential voltage amplifier is real using low noise operational amplifier
Existing current error detection, realizes the control to noise current；DC current sampling module will by VHA516 precision resistance array
Current signal is converted into voltage signal, realizes precision current sampling.
5, the stability of current control is realized using low excursion with temperature voltage reference using High-accuracy direct current voltage reference；
6, the current regulator in current error detection and control module uses power MOS pipe, realizes highly sensitive
Current regulation；
7, laser diode module is designed, DC current path unit therein is the direct current signal low-resistance that inductor is constituted
Anti- channel, alternating current path unit are the AC signal impedance path being made of capacitor, effectively inhibit AC signal in this way
Influence to dc point.
8, high precision electro potential source (output noise be less than 35uVrms), for current control major loop provide high stability with
The control voltage of low noise.
Detailed description of the invention
Fig. 1 is laser diode current control system schematic diagram；
Fig. 2 is that module diagram occurs for direct current signal；
Fig. 3 is current error detection and control module schematic diagram
Fig. 4 is DC potential model- following control module diagram；
Fig. 5 is laser diode module schematic diagram；
In figure: 1. High-accuracy direct current voltage references；2. input control voltage adjuster；3. exporting flow control voltage adjuster；
4. differential voltage amplifier；5. output connects current regulator；6. DC current sampling module；7. level-one current potential model- following control；8.
Second level current potential model- following control；9. alternating voltage current converter；10. DC current path unit；11. alternating current path list
Member；12. laser diode.
Specific embodiment
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
As shown in Figure 1, laser diode current control system includes high precision electro potential source, DC control signal generation mould
Module, current error detection and two pole of control module, DC potential model- following control module and laser occur for block, AC controling signal
Tube module.
There are two input terminals for current error detection and control module tool, and an output end, one of input terminal connection is directly
The output end of module occurs for flow control signals, receives DC control signal, another input terminal connects high precision electro potential source, receives
Its voltage signal occurred.The input terminal of the output end connection laser diode of current error detection and control module, by direct current
Current signal is transferred to laser diode module.
The input terminal of the output end connection DC potential model- following control module of module, DC potential occur for AC controling signal
The AC controling signal that model- following control module will receive, is converted to ac current signal, ac current signal with it is above-mentioned straight
Stream current signal passes to laser diode module simultaneously.
Module occurs for direct current signal as shown in Figure 2, by High-accuracy direct current voltage reference 1, input control voltage adjuster 2
It is formed with output flow control voltage adjuster 3.
High-accuracy direct current voltage reference 1 is MAX6350, and generating high-precision reference dc voltage, (temperature coefficient is
1ppm/ DEG C), input control voltage adjuster 2 is low noise operational amplifier AD8675 (low noise is lower than 8nV/ √ Hz), input
Externally input flow control voltage signal is adjusted to required voltage magnitude, output flow control voltage adjustment by control voltage adjuster 2
Reference dc voltage signal and flow control voltage signal are overlapped and export DC control signal after adjusting amplitude by device 3.
Current error detection as shown in Figure 3 and control module, including differential voltage amplifier 4, output connect current regulation
Device 5 and DC current sampling module 6.
Differential voltage amplifier 4 uses low noise operational amplifier AD8675, receives DC control signal and module occurs
The control signal of generation carries out differential amplification, realizes current error detection, and detection signal is received by current regulator 5；
Current regulator 5 is VHA516 precision resistance array (1ppm/ DEG C of temperature coefficient), it receives high-precision power simultaneously
The flow control signal of generation, is converted into DC current signal, is delivered to DC current sampling module 6；
DC current sampling module 6 is VHA516 precision resistance array, and the current signal received is converted into voltage letter
Number, feedback output realizes precision current sampling to differential voltage amplifier 4, while exporting DC current signal to two pole of laser
Pipe.
DC potential model- following control module as shown in Figure 4, the level-one current potential including the connection of successively closed loop series follow control
System 7, second level current potential model- following control 8 and alternating voltage current converter 9.
Level-one current potential model- following control 7 uses low noise operational amplifier AD8675, and output connects second level current potential model- following control 8
Input, second level current potential model- following control 8 use low noise operational amplifier AD8675, and output connects alternating voltage current converter 9
Input, the input of the output termination level-one current potential model- following control 7 of alternating voltage current converter 9, while alternating voltage electric current
The input terminal of converter 9 receives AC controling signal and the exchange control voltage signal that module generates occurs, and converts thereof into electric current
Signal is sent to laser diode module.
Laser diode module as shown in Figure 5, including DC current path unit 10,11 and of alternating current path unit
Laser diode 12.
DC current path unit 10 is the direct current signal impedance path being made of inductor, and output connects laser diode
12；Alternating current path unit 11 is the AC signal impedance path being made of capacitor, and output connects laser diode 12.
The input terminal of DC current path unit 10 and alternating current path unit 11 receive simultaneously DC current signal and
The superposition of ac current signal.
Claims (5)
1. a kind of laser diode current control system, including module occurs for DC control signal, mould occurs for AC controling signal
Block, it is characterised in that: further include current error detection and control module, DC potential model- following control module and laser diode mould
Block；
Two input terminals of the current error detection and control module are separately connected DC control signal and module output occur
End and voltage source；
The output end of module occurs for the input terminal connection AC controling signal of the DC potential model- following control module；
The output end of the output end and the DC potential model- following control module of current error detection and control module with
The input terminal of laser diode module connects；
DC control signal generation module transmitting direct-current control voltage signal is detected to current error and control module, while electric current
Error-detecting and control module receive the d. c. voltage signal of voltage source, obtain DC current signal for two kinds of signals are converted,
Send it to laser diode；
Module transmitting exchange control voltage signal occurs for AC controling signal to DC potential model- following control module, is converted into
Ac current signal is sent to laser diode after being superimposed with above-mentioned DC current signal.
2. a kind of laser diode current control system as described in claim 1, it is characterised in that: the DC control letter
Number occur module include output flow control voltage adjuster (3) and output end respectively with output flow control voltage adjuster (3) it is defeated
Enter the High-accuracy direct current voltage reference (1) and input control voltage adjuster (2) of end connection；
Wherein the signal receiving end of module, output control occur as direct current signal for the input terminal of input control voltage adjuster (2)
The output end of module occurs as direct current signal for the output end for flowing voltage adjuster (3).
3. a kind of laser diode current control system as described in claim 1, it is characterised in that: the current error inspection
Survey and control module include the sequentially connected differential voltage amplifier of input/output terminal (4), output connect current regulator (5) and directly
It flows current sampling module (6), and the input terminal of output end connection differential voltage amplifier (4) of DC current sampling module (6),
Three forms closed loop；
Wherein, the current signal received is converted into voltage signal by DC current sampling module (6), and feedback output is to differential electrical
It presses amplifier (4), differential voltage amplifier (4) receives DC control signal simultaneously and the control signal that module generates occurs, and carries out
Differential amplification, DC current sampling module (6) export DC current signal to laser diode simultaneously.
4. a kind of laser diode current control system as described in claim 1, it is characterised in that: the DC potential with
With control module, including the sequentially connected level-one current potential model- following control (7) of input/output terminal, second level current potential model- following control (8) and
Alternating voltage current converter (9), and the output end of alternating voltage current converter (9) connects level-one current potential model- following control (7)
Input terminal, three formed closed loop；
The input terminal of alternating voltage current converter (9) receives the exchange control electricity that module generation occurs for AC controling signal simultaneously
Signal is pressed, current signal is converted thereof into and is sent to laser diode module.
5. a kind of laser diode current control system as described in claim 1, it is characterised in that: the laser diode
Module, including the DC current path of laser diode (12) and output end with the input connection of laser diode (12)
Unit (10) and alternating current path unit (11)；
Wherein, the input terminal of DC current path unit (10) and alternating current path unit (11) has common receiving end, connects
Receive the superposition of the output signal of DC potential model- following control module and current error detection and control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610307848.8A CN107370019B (en) | 2016-05-11 | 2016-05-11 | A kind of laser diode current control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610307848.8A CN107370019B (en) | 2016-05-11 | 2016-05-11 | A kind of laser diode current control system |
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| CN107370019A CN107370019A (en) | 2017-11-21 |
| CN107370019B true CN107370019B (en) | 2019-06-11 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110045299A (en) * | 2018-01-17 | 2019-07-23 | 北京航空航天大学 | A kind of quantum sensor magnetic-field closed loop control and monitoring system based on LabVIEW |
| CN109547113B (en) * | 2019-01-21 | 2020-08-25 | 中国科学技术大学 | Transmission method and transmission system of direct current reference signal |
| CN110137798B (en) * | 2019-05-10 | 2020-06-30 | 华科微磁(北京)光电技术有限公司 | Semiconductor laser generator |
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| US7756173B2 (en) * | 2008-06-20 | 2010-07-13 | Alfrey Anthony J | Laser diode driver with adaptive compliance voltage |
| US7940824B2 (en) * | 2008-12-31 | 2011-05-10 | Texas Instruments Incorporated | Laser diode driver architectures |
| CN101702489A (en) * | 2009-11-05 | 2010-05-05 | 中兴通讯股份有限公司 | Biasing circuit of electro-absorption modulated laser and debugging method thereof |
| CN102056363A (en) * | 2009-11-11 | 2011-05-11 | 海洋王照明科技股份有限公司 | LED power driving circuit |
| JP2014150208A (en) * | 2013-02-04 | 2014-08-21 | Sanken Electric Co Ltd | LED Drive circuit |
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| CN107370019A (en) | 2017-11-21 |
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