CN107565379A - Miniature laser drive system - Google Patents
Miniature laser drive system Download PDFInfo
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- CN107565379A CN107565379A CN201710954050.7A CN201710954050A CN107565379A CN 107565379 A CN107565379 A CN 107565379A CN 201710954050 A CN201710954050 A CN 201710954050A CN 107565379 A CN107565379 A CN 107565379A
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Abstract
The invention discloses miniature laser drive system; including D.C. regulated power supply, slow start circuit, negative-feedback constant-current source circuit, semiconductor laser and protection circuit; the D.C. regulated power supply connects 220V civil powers; the D.C. regulated power supply, slow start circuit, negative-feedback constant-current source circuit, semiconductor laser and protection circuit are sequentially connected, and the negative-feedback constant-current source circuit is used for the impact for avoiding surge current noise spectra of semiconductor lasers.The present invention enters line translation so as to improve the stability of semiconductor laser driving power output by D.C. regulated power supply, slow start circuit, negative-feedback constant-current source circuit, semiconductor laser and protection circuit to voltage.
Description
Technical field
The present invention relates to laser, and in particular to miniature laser drive system.
Background technology
With the continuous expansion to reach its maturity with application field of laser technology, the own warp of application of semiconductor laser
The numerous areas of photoelectronics is covered, turns into the core technology of current photoelectron science.Because semiconductor laser has knot
Structure is simple, small volume, last a long time, be easy to modulation and it is cheap the advantages that, semiconductor laser oneself through in fiber optic communication, light
Sensing, CD, laser printing, bar code scanning, integrated optics field play extremely important effect, and in measurement, automatic
There is more and more important application in terms of control, medical treatment, material processing and pump light source, and be widely used in military field,
Such as laser ranging, laser guidance tracking, laser radar, laser fuze, laser communication power supply, laser analog weapon, laser aiming
Alarm, laser communication and laser gyro etc..With the progress and development of society, semiconductor laser has been entrained into wider section
Field.On the other hand and device involved theory and work in itself on the one hand it is due to the continuous extension of its application field,
The constantly improve of skill, performance improve constantly, and are widely used in every field such as communication, measurement, processing, controls, together
When in medical treatment and the field such as life science also play increasing effect.Semiconductor laser is different by pump mode, can
To be divided into injection laser, optically pumped laser and electron beam pumped laser.Wherein injection laser is to utilize homojunction
Structure or hetero-junctions are by substantial amounts of excess carriers (hole of electronics one to) injection active region to form population inversion.This kind of laser
Device is and compact-sized due to easily realizing stimulated radiation, easy to use, and processing technology is simply ripe, and pouring-in half
The power supply of conductor laser is simple, thus it is possible to vary Injection Current directly modulates output, therefore it is the most widely used at present
A kind of semiconductor laser, but the power output of existing semiconductor laser driving is unstable, influences semiconductor laser
Application.
The content of the invention
The technical problems to be solved by the invention are that the power output of existing semiconductor laser driving is unstable, purpose
It is to provide miniature laser drive system, improves the stability of semiconductor laser driving power output.
The present invention is achieved through the following technical solutions：
Miniature laser drive system, including D.C. regulated power supply, slow start circuit, negative-feedback constant-current source circuit, partly lead
Body laser and protection circuit, the D.C. regulated power supply connect 220V civil powers, the D.C. regulated power supply, slow start circuit,
Negative-feedback constant-current source circuit, semiconductor laser and protection circuit are sequentially connected, and the negative-feedback constant-current source circuit is used to avoid
The impact of surge current noise spectra of semiconductor lasers.
Further, the D.C. regulated power supply includes power transformer, rectification circuit, filter circuit, mu balanced circuit, institute
State power transformer, rectification circuit, filter circuit, mu balanced circuit to be sequentially connected, the power transformer connects 220V civil powers, institute
State mu balanced circuit connection slow start circuit.
Further, the D.C. regulated power supply includes transformer T2, rectifier bridge D1, electrochemical capacitor C1, electric capacity C2, resistance
R1, electrochemical capacitor C3, resistance R2, diode T6, electrochemical capacitor C4, resistance R3 and three-terminal regulator block U1, the transformer T2 mono-
Secondary winding terminal connects 220V civil powers, and the secondary winding of the transformer T2 is connected to rectifier bridge D1 two inputs, described whole
Stream bridge D1 two output ends are connected to electrochemical capacitor C1 both ends；The electric capacity C2 is connected in parallel on electrochemical capacitor C1 both ends；
The input of the three-terminal regulator block U1 is connected to electrochemical capacitor C1 positive pole, the control terminal connection electricity of the three-terminal regulator block U1
R1 is hindered, the other end ground connection at resistance R1 connection three-terminal regulator block U1 ends is connected to electrochemical capacitor C1 negative pole simultaneously；The resistance
R2 connects with electrochemical capacitor C3, resistance R2 connection electrochemical capacitors C3 positive pole, the other end at resistance R2 connection electrochemical capacitor C3 ends
With three-terminal regulator block U1 output end；Electrochemical capacitor C3 negative pole ground connection；Diode T6 anode is connected to three-terminal regulator block U1
On the circuit for connecting resistance R1, its negative electrode is connected on the circuit that resistance R2 is connected with three-terminal regulator block U1；Electrochemical capacitor C4's
Anode is connected on the circuit that resistance R2 is connected with three-terminal regulator block U1, its negative pole ground connection；Resistance R3 is connected in parallel on electrochemical capacitor C4
Both ends；Resistance R3 both ends are DC voltage output end.
The present invention compared with prior art, has the following advantages and advantages：The present invention by D.C. regulated power supply,
Slow start circuit, negative-feedback constant-current source circuit, semiconductor laser and protection circuit enter line translation to voltage so as to improve half
Conductor laser drives the stability of power output.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the embodiment of the present invention, forms one of the application
Point, do not form the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is schematic structural view of the invention；
Fig. 2 is DC-stabilized circuit figure of the present invention.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, with reference to embodiment and accompanying drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation are only used for explaining the present invention, do not make
For limitation of the invention.
Embodiment
As depicted in figs. 1 and 2, miniature laser drive system, including D.C. regulated power supply, slow start circuit, negative-feedback
Constant-current source circuit, semiconductor laser and protection circuit, the D.C. regulated power supply connect 220V civil powers, the DC voltage-stabilizing electricity
Source, slow start circuit, negative-feedback constant-current source circuit, semiconductor laser and protection circuit are sequentially connected, the negative-feedback constant current
Source circuit is used for the impact for avoiding surge current noise spectra of semiconductor lasers.
The D.C. regulated power supply includes power transformer, rectification circuit, filter circuit, mu balanced circuit, and the power supply becomes
Depressor, rectification circuit, filter circuit, mu balanced circuit are sequentially connected, and the power transformer connects 220V civil powers, the voltage stabilizing electricity
Road connects slow start circuit.
The D.C. regulated power supply includes transformer T2, rectifier bridge D1, electrochemical capacitor C1, electric capacity C2, resistance R1, electrolysis electricity
Hold C3, resistance R2, diode T6, electrochemical capacitor C4, resistance R3 and three-terminal regulator block U1, the transformer T2 first windings end to connect
Connecing 220V civil powers, the secondary winding of the transformer T2 is connected to rectifier bridge D1 two inputs, and the two of the rectifier bridge D1
Individual output end is connected to electrochemical capacitor C1 both ends；The electric capacity C2 is connected in parallel on electrochemical capacitor C1 both ends；Three end is steady
Briquetting U1 input is connected to electrochemical capacitor C1 positive pole, the control terminal connection resistance R1 of the three-terminal regulator block U1, resistance
The other end ground connection at R1 connection three-terminal regulator block U1 ends is connected to electrochemical capacitor C1 negative pole simultaneously；The resistance R2 and electrolysis electricity
Hold C3 series connection, resistance R2 connection electrochemical capacitors C3 positive pole, the other end and three-terminal voltage-stabilizing at resistance R2 connection electrochemical capacitor C3 ends
Block U1 output end；Electrochemical capacitor C3 negative pole ground connection；Diode T6 anode is connected to three-terminal regulator block U1 connection resistance R1
Circuit on, its negative electrode is connected on the circuit that resistance R2 is connected with three-terminal regulator block U1；Electrochemical capacitor C4 anode is connected to
On the circuit that resistance R2 is connected with three-terminal regulator block U1, its negative pole ground connection；Resistance R3 is connected in parallel on electrochemical capacitor C4 both ends；Resistance R3
Both ends are DC voltage output end.
The chip of selection is LM317, and integrated three-terminal regulator block variable as output voltage LM317 is a kind of user
Just, widely used integrated voltage stabilizer.The model of 317 serial regulator blocks is a lot, and making output voltage through conventional 317 regulator blocks can
The voltage-stabilized power supply of change.Simultaneously because LM317 chips using be input and output pressure difference in the range of 3V-40V, so, choosing
It is 18V to select input voltage.The output voltage of voltage-stabilized power supply is calculated with following formula, Vo=1.25 (1+R6/R8)+IAdj × R.This voltage stabilizing
Device is highly susceptible to using, it is only necessary to which two non-essential resistances set output voltage.Additionally tool uses Internal current limit, Thermal shutdown and peace
Full workspace compensation is allowed to that blowout can be prevented substantially.LM317 is applied to steady in a variety of occasions, including local voltage stabilizing, card
Pressure.In the application, for the steady operation of circuit, in general, it is also necessary to connect diode as protection circuit, prevent electricity
High pressure when electric capacity in road discharges burns out LM317.
Semiconductor laser drive power, can be in circuit in make-and-break contact in the case of no slow turn-on measure
One transient process of middle formation, i.e., when opening, there is the very big overshoot of amplitude in driving current, then passes through transient process and just becomes
It is stable.The overshoot of this driving current easily makes PN sections suffer electrical breakdown, and interface suffers light injury or destruction.Even if the intensity of surge or
Duration is unlikely to make laser produce complete failure in first time power-on, but under the impact of multiple surge
The degeneration of meeting accelerated semiconductor laser performance and last failure.Therefore, to avoid this electric current for the broken of semiconductor laser
It is bad, it is necessary to which that laser drive power is designed to slow start circuit so that electric current output slowly rises to rated value by zero, ensures
Laser smoothly transits to normal work area, so can effectively eliminate surge impact caused by power supply on or off.
Above-described embodiment, the purpose of the present invention, technical scheme and beneficial effect are carried out further
Describe in detail, should be understood that the embodiment that the foregoing is only the present invention, be not intended to limit the present invention
Protection domain, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc., all should include
Within protection scope of the present invention.
Claims (3)
1. miniature laser drive system, it is characterised in that including D.C. regulated power supply, slow start circuit, negative-feedback constant-current source
Circuit, semiconductor laser and protection circuit, the D.C. regulated power supply connect 220V civil powers, the D.C. regulated power supply, slow
Start-up circuit, negative-feedback constant-current source circuit, semiconductor laser and protection circuit are sequentially connected, the negative-feedback constant-current source circuit
For avoiding the impact of surge current noise spectra of semiconductor lasers.
2. miniature laser drive system according to claim 1, it is characterised in that the D.C. regulated power supply includes electricity
Source transformer, rectification circuit, filter circuit, mu balanced circuit, the power transformer, rectification circuit, filter circuit, mu balanced circuit
It is sequentially connected, the power transformer connects 220V civil powers, and the mu balanced circuit connects slow start circuit.
3. miniature laser drive system according to claim 1, it is characterised in that the D.C. regulated power supply includes becoming
Depressor T2, rectifier bridge D1, electrochemical capacitor C1, electric capacity C2, resistance R1, electrochemical capacitor C3, resistance R2, diode T6, electrochemical capacitor
C4, resistance R3 and three-terminal regulator block U1, the transformer T2 first windings end connect 220V civil powers, and the transformer T2's is secondary
Winding is connected to rectifier bridge D1 two inputs, and two output ends of the rectifier bridge D1 are connected to electrochemical capacitor C1's
Both ends；The electric capacity C2 is connected in parallel on electrochemical capacitor C1 both ends；The input of the three-terminal regulator block U1 is connected to electrochemical capacitor C1
Positive pole, the three-terminal regulator block U1 control terminal connection resistance R1, another termination at resistance R1 connection three-terminal regulator block U1 ends
Ground is connected to electrochemical capacitor C1 negative pole simultaneously；The resistance R2 connects with electrochemical capacitor C3, resistance R2 connection electrochemical capacitors C3
Positive pole, the other end at resistance R2 connection electrochemical capacitor C3 ends and three-terminal regulator block U1 output end；Electrochemical capacitor C3 negative pole
Ground connection；Diode T6 anode is connected on three-terminal regulator block U1 connection resistance R1 circuit, its negative electrode be connected to resistance R2 with
On the circuit of three-terminal regulator block U1 connections；Electrochemical capacitor C4 anode is connected to the circuit that resistance R2 is connected with three-terminal regulator block U1
On, its negative pole ground connection；Resistance R3 is connected in parallel on electrochemical capacitor C4 both ends；Resistance R3 both ends are DC voltage output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710954050.7A CN107565379A (en) | 2017-10-13 | 2017-10-13 | Miniature laser drive system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710954050.7A CN107565379A (en) | 2017-10-13 | 2017-10-13 | Miniature laser drive system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107565379A true CN107565379A (en) | 2018-01-09 |
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ID=60985629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710954050.7A Pending CN107565379A (en) | 2017-10-13 | 2017-10-13 | Miniature laser drive system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107565379A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109950790A (en) * | 2019-04-03 | 2019-06-28 | 中国科学院苏州生物医学工程技术研究所 | A kind of laser control circuit, a kind of laser aid |
| CN110061640A (en) * | 2019-05-21 | 2019-07-26 | 北京起航骏业科技有限公司 | A kind of semiconductor power system modules with lc circuit |
-
2017
- 2017-10-13 CN CN201710954050.7A patent/CN107565379A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109950790A (en) * | 2019-04-03 | 2019-06-28 | 中国科学院苏州生物医学工程技术研究所 | A kind of laser control circuit, a kind of laser aid |
| CN110061640A (en) * | 2019-05-21 | 2019-07-26 | 北京起航骏业科技有限公司 | A kind of semiconductor power system modules with lc circuit |
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Legal Events
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180109 |
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| WD01 | Invention patent application deemed withdrawn after publication |