CN105680298B - A kind of Sofe Switch laser driving circuit - Google Patents
A kind of Sofe Switch laser driving circuit Download PDFInfo
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- CN105680298B CN105680298B CN201610213615.1A CN201610213615A CN105680298B CN 105680298 B CN105680298 B CN 105680298B CN 201610213615 A CN201610213615 A CN 201610213615A CN 105680298 B CN105680298 B CN 105680298B
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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
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Semiconductor Lasers (AREA)
Abstract
A kind of Sofe Switch laser driving circuit, wherein C1 are DC filter capacitor, C2, C3 is resonant capacitance, with MOS1, MOS2, inductance L1, transformer T1 form half-bridge soft switch circuit, diode D1 together, D2, D3, D4, L2, capacitance Cd are output rectifier and filter, resistance R1, R2 is driving resistance, and transformer T2 is driving transformer.
Description
Technical field
The present invention relates to a kind of driving circuits of laser, belong to photoelectron technical field.
Background technology
There are many kinds of the types of laser, as solid state laser, gas laser, semiconductor laser, optical fiber laser
Etc..In these lasers, in addition to part semiconductor laser belongs to Direct Current pumping, remaining laser is substantially
It is all pumped by pumping source, especially for powerful laser, needs to use powerful driving circuit pair
Pumping source is driven, and to generate powerful pump light, but is set in the prior art generally be directed to different lasers
Different driving circuits is counted, general driving circuit can be seldom adapted to by simply changing on other lasers.Also, it is right
For the driving circuit of high power laser, the driving voltage that superpower laser generally requires is also relatively high, at this point, transformation
Device is not easy to design, and is mainly reflected in the problems such as insulation is bad, and parasitic capacitance is big, and leakage inductance is big, furthermore transformer in this way in circuit
Secondary devices are not easy to choose.The present invention exactly puts forward regarding to the issue above.
Invention content
An embodiment according to the present invention provides a kind of laser Sofe Switch driving circuit, including input terminal, wherein defeated
It includes positive input terminal vin1+ and negative input end vin1- to enter end, and positive input terminal vin1+ is separately connected one end of capacitance C1, capacitance C2
One end and field-effect tube MOS1 drain electrode, negative input end vin1- is separately connected the other end of capacitance C1, one end of capacitance C3
And the source electrode of field-effect tube MOS2, the other end of the other end connection capacitance C3 of capacitance C2 and jointly the one of connection inductance L1
End, the other end of inductance L1 are separately connected the drain electrode of the source electrode and field-effect tube MOS2 of field-effect tube MOS1, time of transformer T2
Grade includes two coils, and field-effect tube MOS1 is connected with R2 by resistance R1 respectively for two different name ends in two coils and field is imitated
Should pipe MOS2 grid, other two different name end is then separately connected the source electrode of value field-effect tube MOS1 and field-effect tube MOS2, becomes
Two input terminals of the primary coil of depressor T2 are separately connected two output ends of drive signal, transformer T1 primary coils and electricity
Feel L1 parallel connections, a cathode for being separately connected diode D1 in two output ends of transformer T1 secondary coils and diode D2
Anode, another is separately connected the anode of the cathode of diode D3 and diode D4, the anode and diode of diode D1
One end of capacitance Cd, one end of resistance R and one end of laser, diode D2 are separately connected after the anode connection of D3 jointly
Cathode connect with the cathode of diode D4 after common connection inductance L2 one end, the other end of inductance L2 is separately connected electricity
Hold the other end of Cd, the other end of resistance R and the anode of thyristor THY, the cathode connecting laser of thyristor THY
Other end, output voltage detecting circuit is in parallel with resistance R, and one of the output connection comparator of output voltage detecting circuit is defeated
Enter end, the output end rate of connections of comparator adjusts the input terminal of circuit, and the output end of frequency adjustment circuit connects driving circuit
Input terminal, another input terminal of comparator inputs given voltage.
Description of the drawings
Attached drawing 1 is the schematic diagram of the laser driving circuit of the present invention.
Specific implementation mode
Below will on the basis of in conjunction with attached drawing detailed description of the present invention laser driving circuit.The laser of the present invention
Driving circuit concrete composition is as follows：
Including input terminal, wherein input terminal includes positive input terminal vin1+ and negative input end vin1-, vin1+ points of positive input terminal
Not Lian Jie capacitance C1 one end, one end of capacitance C2 and the drain electrode of field-effect tube MOS1, negative input end vin1- are separately connected electricity
Hold the other end of C1, one end of capacitance C3 and the source electrode of field-effect tube MOS2, the other end connection capacitance C3's of capacitance C2 is another
One end and the one end for connecting inductance L1 jointly, the other end of inductance L1 are separately connected the source electrode and field-effect tube of field-effect tube MOS1
The drain electrode of MOS2, the secondary of transformer T2 include two coils, two different name ends in two coils pass through respectively resistance R1 and
The grid of R2 connection field-effect tube MOS1 and field-effect tube MOS2, other two different name end are then separately connected value field-effect tube MOS1
It is separately connected two outputs of drive signal with two input terminals of the source electrode of field-effect tube MOS2, the primary coil of transformer T2
End, transformer T1 primary coils are in parallel with inductance L1, and one in two output ends of transformer T1 secondary coils is separately connected
The anode of the cathode and diode D2 of diode D1, another is separately connected the sun of the cathode of diode D3 and diode D4
Pole, the anode of diode D1 connect the one end for being separately connected capacitance Cd jointly later, one end of resistance R with the anode of diode D3
And one end of laser, the cathode of diode D2 connect one end of common connection inductance L2 later with the cathode of diode D4,
The other end of inductance L2 is separately connected the other end of capacitance Cd, the other end of resistance R and the anode of thyristor THY,
The other end of the cathode connecting laser of thyristor THY, output voltage detecting circuit is in parallel with resistance R, output voltage detection
One input terminal of the output connection comparator of circuit, the output end rate of connections of comparator adjust the input terminal of circuit, frequency
The input terminal of the output end connection driving circuit of circuit is adjusted, another input terminal of comparator inputs given voltage.
The circuit of the above-mentioned driving of the present invention is a kind of soft switch circuit.Wherein C1 is DC filter capacitor, and C2, C3 are humorous
Shake capacitance, and half-bridge soft switch circuit is formed together with MOS1, MOS2, inductance L1, transformer T1, diode D1, D2, D3, D4,
L2, capacitance Cd are output rectifier and filter, and resistance R1, R2 are driving resistance, and transformer T2 is driving transformer.
Working method is as follows, MOS1 conductings, rear to turn off, rear MOS2 conductings, rear to turn off again, so recycles.Wherein MOS1, with
The turn-on time of MOS2 is identical, respectively accounts for the half of same switch periods, and the frequency of alternate conduction is determined by the output voltage needed,
When the output voltage needed is high, the driving frequency of MOS1 and MOS2 become larger, when the output voltage needed is low, the drive of MOS1 and MOS2
Dynamic frequency becomes smaller, by adjust driving frequency size come achieve the purpose that control output voltage, when driving frequency reach L1 with
When the resonant frequency of C1+C2, there is highest output voltage.In whole work process, MOS1, MOS2 are soft open-minded, soft switching.
General laser is that input voltage is relatively low but output voltage is very high.The primary and secondary no-load voltage ratio of transformer is bigger, no
It is easy design.This circuit is voltage resonant circuit, and L1 can be several times to tens times of input voltage when resonance, using transformation
The boosting again of device, with the transformer of smaller no-load voltage ratio, you can reach desired output voltage.
Claims (1)
1. a kind of laser Sofe Switch driving circuit, including input terminal, wherein input terminal include positive input terminal vin1+ and negative input
Vin1-, positive input terminal vin1+ is held to be separately connected one end of capacitance C1, one end of capacitance C2 and the drain electrode of field-effect tube MOS1,
Negative input end vin1- is separately connected the other end of capacitance C1, one end of capacitance C3 and the source electrode of field-effect tube MOS2, capacitance C2
Other end connection capacitance C3 the other end and connect one end of inductance L1 jointly, the other end of inductance L1 is separately connected field-effect
The secondary of the drain electrode of the source electrode and field-effect tube MOS2 of pipe MOS1, transformer T2 includes two coils, respectively has one in two coils
A different name end passes through resistance R1 and connects the grid of field-effect tube MOS1 and field-effect tube MOS2 with R2 respectively, it is corresponding another
Different name end is then separately connected the source electrode of value field-effect tube MOS1 and field-effect tube MOS2, and two of the primary coil of transformer T2 are defeated
Enter two output ends that end is separately connected drive signal, transformer T1 primary coils are in parallel with inductance L1, transformer T1 secondary wires
The anode of the cathode for being separately connected diode D1 and diode D2 in two output ends of circle, another is separately connected
The anode of the anode of the cathode and diode D4 of diode D3, diode D1 connect common difference later with the anode of diode D3
One end of capacitance Cd, one end of resistance R and one end of laser are connected, the cathode of diode D2 connects with the cathode of diode D4
One end of common connection inductance L2, the other end of inductance L2 are separately connected the other end of capacitance Cd after connecing, and resistance R's is another
The anode of outer one end and thyristor THY, the other end of the cathode connecting laser of thyristor THY, output voltage detection electricity
Road is in parallel with resistance R, an input terminal of the output connection comparator of output voltage detecting circuit, the output end connection of comparator
The input terminal of frequency adjustment circuit, the input terminal of the output end connection driving circuit of frequency adjustment circuit, other the one of comparator
A input terminal inputs given voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610213615.1A CN105680298B (en) | 2016-04-01 | 2016-04-01 | A kind of Sofe Switch laser driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610213615.1A CN105680298B (en) | 2016-04-01 | 2016-04-01 | A kind of Sofe Switch laser driving circuit |
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| Publication Number | Publication Date |
|---|---|
| CN105680298A CN105680298A (en) | 2016-06-15 |
| CN105680298B true CN105680298B (en) | 2018-08-10 |
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| CN201610213615.1A Expired - Fee Related CN105680298B (en) | 2016-04-01 | 2016-04-01 | A kind of Sofe Switch laser driving circuit |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107785874B (en) * | 2016-08-30 | 2022-05-10 | 中兴通讯股份有限公司 | Power supply protection method, device and circuit |
| CN108969898B (en) * | 2018-06-29 | 2019-12-10 | 河南省宇安医疗科技开发有限公司 | Impedance matching type optical power control circuit of semiconductor laser pain therapeutic apparatus |
| 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 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5734668A (en) * | 1992-10-07 | 1998-03-31 | Diomed Limited | Laser diode drive circuit |
| DE69525407D1 (en) * | 1994-09-30 | 2002-03-21 | Nec Corp | Device for the electrical power supply of a flash lamp and suitable method |
| CN203233324U (en) * | 2013-05-17 | 2013-10-09 | 武汉梅曼科技有限公司 | Pulse solid-state laser power supply with wide voltage output range |
| CN104319610A (en) * | 2014-08-27 | 2015-01-28 | 华北电力大学（保定） | Laser driving circuit |
| CN205543671U (en) * | 2016-04-01 | 2016-08-31 | 华北电力大学（保定） | Soft switch laser drive circuit |
-
2016
- 2016-04-01 CN CN201610213615.1A patent/CN105680298B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5734668A (en) * | 1992-10-07 | 1998-03-31 | Diomed Limited | Laser diode drive circuit |
| DE69525407D1 (en) * | 1994-09-30 | 2002-03-21 | Nec Corp | Device for the electrical power supply of a flash lamp and suitable method |
| CN203233324U (en) * | 2013-05-17 | 2013-10-09 | 武汉梅曼科技有限公司 | Pulse solid-state laser power supply with wide voltage output range |
| CN104319610A (en) * | 2014-08-27 | 2015-01-28 | 华北电力大学（保定） | Laser driving circuit |
| CN205543671U (en) * | 2016-04-01 | 2016-08-31 | 华北电力大学（保定） | Soft switch laser drive circuit |
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| CN105680298A (en) | 2016-06-15 |
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