CN105742949B - A kind of driving circuit of high power laser - Google Patents
A kind of driving circuit of high power laser Download PDFInfo
- Publication number
- CN105742949B CN105742949B CN201610213614.7A CN201610213614A CN105742949B CN 105742949 B CN105742949 B CN 105742949B CN 201610213614 A CN201610213614 A CN 201610213614A CN 105742949 B CN105742949 B CN 105742949B
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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)
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- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Semiconductor Lasers (AREA)
Abstract
The laser driving circuit of the present invention uses the form that the identical circuit of two-way function is in series, for superpower laser, required driving voltage is often higher, transformer is not easy to design, and secondary devices are not easy to choose, and the present invention uses the independent circuit of two-stage using prime, secondary tandem, so each secondary voltage is relatively low, is conducive to design of transformer, is conducive to secondary devices selection.The input of two-way circuit can be that same DC voltage inputs, or different DC voltage inputs, input voltage may be the same or different, and facilitate the selection of power supply.Two-way circuit individually controls, and controls phase mutual deviation 180 degree, is conducive to secondary filtering, behind there are three voltage sensor, detect the voltage and overall output voltage of each road output respectively, if damaging all the way, do not influence another way output.
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 driving circuit, including the first and second input terminals,
Middle first input end includes positive input terminal vin1+ and negative input end vin1-, and the second input terminal includes positive input terminal vin2+ and bears
Input terminal vin2-, the midpoint of two windings of primary of positive input terminal vin1+ connection transformers T1, the midpoint are primary first He
The other end of the different name end tie point of second winding, primary first winding and the second winding be separately connected field-effect tube mos1 and
It is connected in parallel on the absorption circuit of the drain electrode and source electrode both ends of MOS1 as mos1 after the drain electrode of mos2, resistance R6 and capacitance C3 series connection,
It is connected in parallel on the absorption circuit of the drain electrode and source electrode both ends of MOS2 as mos2 after resistance R7 and capacitance C4 series connection, mos1 and mos2's
The gate pole that source electrode is all connected to negative input end vin1-, mos1 and mos2 is connected to microprocessor by resistance R10 and R11 respectively
MCU.For the secondary tool of transformer T1 there are two output end, the anode and diode D3 of one of output end connection diode D1 is cloudy
Pole, other end connect the cathode of the anode and diode D4 of diode D2, and the cathode of diode D1 and D2 are commonly connected to electricity
Feel one end of L1, the anode of diode D3 and D4 are commonly connected to one end of capacitance C1 and one end of resistance R3, inductance L1's
Other end is commonly connected to one end of resistance R2, isolation voltage sensor VSEN1 again after being connect with the other end of capacitance C1
An input terminal and thyristor THY1 anode, the cathode connecting laser of thyristor THY1, the other end of resistance R2
Connect with the other end of resistance R3, isolation voltage sensor VSEN2 is in parallel with resistance R3, isolation voltage sensor VSEN1 and
The output end of VSEN2 is separately connected Micro-processor MCV；
The midpoint of two windings of primary of positive input terminal vin2+ connection transformers T2, the midpoint are primary first and second
The other end of the different name end tie point of winding, primary first winding and the second winding is separately connected field-effect tube mos3 and mos4
Drain electrode, be connected in parallel on the absorption circuit of the drain electrode and source electrode both ends of MOS3 as mos3, resistance after resistance R8 and capacitance C5 series connection
It is connected in parallel on the absorption circuit of the drain electrode and source electrode both ends of MOS4 as mos4, the source electrode of mos3 and mos4 after R9 and capacitance C6 series connection
The gate pole for being all connected to negative input end vin2-, mos3 and mos4 is connected to Micro-processor MCV by resistance R12 and R13 respectively.
For the secondary tool of transformer T2 there are two output end, one of output end connects the anode and diode D7 cathodes of diode D5,
Other end connects the cathode of the anode and diode D8 of diode D6, and the cathode of diode D5 and D7 are commonly connected to inductance L2
One end, the anode of diode D6 and D8 is commonly connected to one end of capacitance C2 and one end of resistance R4, and inductance L2 is in addition
One end be commonly connected to again after being connect with the other end of capacitance C2 one end of resistance R4, isolation voltage sensor VSEN1 it is another
An outer input terminal and laser, the other end of resistance R4 are connect with the other end of resistance R5, isolation voltage sensor
VSEN3 is in parallel with resistance R5, and the output end of isolation voltage sensor VSEN3 connects Micro-processor MCV, meanwhile, capacitance C1 and C2
It is connected in series with.
According to another preferred embodiment, a kind of laser-driving method is provided, for one of circuit
For, mos3 and mos4 alternate conductions, MCU detects output voltage, and the driving pulse that mos pipes are then adjusted according to detection voltage is wide
Degree constitutes feedback circuit to achieve the purpose that adjust output 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 the first and second input terminals, wherein first input end includes positive input terminal vin1+ and negative input end vin1-,
Second input terminal includes positive input terminal vin2+ and negative input end vin2-, the primary two of positive input terminal vin1+ connection transformers T1
The midpoint of a winding, the midpoint are the different name end tie point of primary first and second windings, primary first winding and the second winding
Other end be separately connected the drain electrode of field-effect tube mos1 and mos2, the leakage of MOS1 is connected in parallel on after resistance R6 and capacitance C3 series connection
Drain electrode and the source electrode both ends of MOS2 are connected in parallel on after the absorption circuit of pole and source electrode both ends as mos1, resistance R7 and capacitance C4 series connection
As the absorption circuit of mos2, the source electrode of mos1 and mos2 are all connected to the gate pole difference of negative input end vin1-, mos1 and mos2
It is connected to Micro-processor MCV by resistance R10 and R11.There are two output end, one of output ends for the secondary tool of transformer T1
The anode and diode D3 cathodes of diode D1 are connected, other end connects the cathode of the anode and diode D4 of diode D2,
The cathode of diode D1 and D2 are commonly connected to one end of inductance L1, and the anode of diode D3 and D4 are commonly connected to capacitance C1's
One end and one end of resistance R3, the other end of inductance L1 are commonly connected to resistance again after being connect with the other end of capacitance C1
One end, an input terminal of isolation voltage sensor VSEN1 and the anode of thyristor THY1 of R2, the cathode of thyristor THY1
The other end of connecting laser, resistance R2 is connect with the other end of resistance R3, isolation voltage sensor VSEN2 and resistance R3
The output end of parallel connection, isolation voltage sensor VSEN1 and VSEN2 is separately connected Micro-processor MCV.
The midpoint of two windings of primary of positive input terminal vin2+ connection transformers T2, the midpoint are primary first and second
The other end of the different name end tie point of winding, primary first winding and the second winding is separately connected field-effect tube mos3 and mos4
Drain electrode, be connected in parallel on the absorption circuit of the drain electrode and source electrode both ends of MOS3 as mos3, resistance after resistance R8 and capacitance C5 series connection
It is connected in parallel on the absorption circuit of the drain electrode and source electrode both ends of MOS4 as mos4, the source electrode of mos3 and mos4 after R9 and capacitance C6 series connection
The gate pole for being all connected to negative input end vin2-, mos3 and mos4 is connected to Micro-processor MCV by resistance R12 and R13 respectively.
For the secondary tool of transformer T2 there are two output end, one of output end connects the anode and diode D7 cathodes of diode D5,
Other end connects the cathode of the anode and diode D8 of diode D6, and the cathode of diode D5 and D7 are commonly connected to inductance L2
One end, the anode of diode D6 and D8 is commonly connected to one end of capacitance C2 and one end of resistance R4, and inductance L2 is in addition
One end be commonly connected to again after being connect with the other end of capacitance C2 one end of resistance R4, isolation voltage sensor VSEN1 it is another
An outer input terminal and laser, the other end of resistance R4 are connect with the other end of resistance R5, isolation voltage sensor
VSEN3 is in parallel with resistance R5, and the output end of isolation voltage sensor VSEN3 connects Micro-processor MCV, meanwhile, capacitance C1 and C2
It is connected in series with.
According to above-mentioned circuit design, it can be seen that it is identical that laser driving circuit of the invention uses two-way function
The form that is in series of circuit, for superpower laser, required driving voltage is often higher, and transformer is not easy to design,
Secondary devices are not easy to choose, and the present invention uses the independent circuit of two-stage, secondary tandem, then each secondary voltage using prime
It is relatively low, be conducive to design of transformer, be conducive to secondary devices selection.The input of two-way circuit can be same DC voltage
Input, or different DC voltage inputs, input voltage may be the same or different, and facilitate the selection of power supply.Two-way
Circuit individually controls, and controls phase mutual deviation 180 degree, is conducive to secondary filtering, behind there are three voltage sensor, detect respectively
The voltage and overall output voltage of each road output do not influence another way output if damaging all the way.
Its course of work approximately as：For one of circuit, mos3 and mos4 alternate conductions, MCU detects defeated
Go out voltage, the driving pulse width of mos pipes is then adjusted according to detection voltage, to achieve the purpose that adjust output voltage, structure
At feedback circuit.
Claims (2)
1. a kind of laser driving circuit, including the first and second input terminals, wherein first input end include positive input terminal vin1+
With negative input end vin1-, the second input terminal includes positive input terminal vin2+ and negative input end vin2-, positive input terminal vin1+ connections
The midpoint of two windings of primary of transformer T1, the midpoint are the different name end tie point of primary first and second windings, primary the
The other end of one winding and the second winding is separately connected the drain electrode of field-effect tube mos1 and mos2, resistance R6 and capacitance C3 series connection
It is connected in parallel on the absorption circuit of the drain electrode and source electrode both ends of mos1 as mos1 afterwards, mos2 is connected in parallel on after resistance R7 and capacitance C4 series connection
Absorption circuit as mos2 of drain electrode and source electrode both ends, the source electrode of mos1 and mos2 is all connected to negative input end vin1-, mos1
Micro-processor MCV is connected to by resistance R10 and R11 respectively with the gate pole of mos2, there are two outputs for the secondary tool of transformer T1
End, the anode and diode D3 cathodes of one of output end connection diode D1, other end connect the anode of diode D2
It is commonly connected to one end of inductance L1, the anode of diode D3 and D4 with the cathode of the cathode of diode D4, diode D1 and D2
It is commonly connected to one end of capacitance C1 and one end of resistance R3, the other end of inductance L1 is connect with the other end of capacitance C1
It is commonly connected to one end, an input terminal of isolation voltage sensor VSEN1 and the sun of thyristor THY1 of resistance R2 again afterwards
The other end of pole, the cathode connecting laser of thyristor THY1, resistance R2 is connect with the other end of resistance R3, isolation voltage
Sensor VSEN2 is in parallel with resistance R3, and the output end of isolation voltage sensor VSEN1 and VSEN2 are separately connected microprocessor
MCU；
The midpoint of two windings of primary of positive input terminal vin2+ connection transformers T2, the midpoint are primary first and second windings
Different name end tie point, the other end of primary first winding and the second winding is separately connected the leakage of field-effect tube mos3 and mos4
Be connected in parallel on the absorption circuit of the drain electrode and source electrode both ends of mos3 as mos3 after pole, resistance R8 and capacitance C5 series connection, resistance R9 with
It is connected in parallel on the absorption circuit of the drain electrode and source electrode both ends of mos4 as mos4 after capacitance C6 series connection, the source electrode of mos3 and mos4 all connect
The gate pole for being connected to negative input end vin2-, mos3 and mos4 is connected to Micro-processor MCV, transformation by resistance R12 and R13 respectively
The secondary tool of device T2 is there are two output end, and one of output end connects the anode and diode D7 cathodes of diode D5, in addition
One end connects the cathode of the anode and diode D8 of diode D6, and the cathode of diode D5 and D6 are commonly connected to the one of inductance L2
End, the anode of diode D7 and D8 are commonly connected to one end of capacitance C2, one end of resistance R5 and isolation voltage sensor
Another input terminal of VSEN1, the other end of inductance L2 are commonly connected to electricity again after being connect with the other end of capacitance C2
One end of R4, one end of resistance R3 are hindered, the other end of resistance R4 is connect with the other end of resistance R5, isolation voltage sensor
VSEN3 is in parallel with resistance R5, and the output end of isolation voltage sensor VSEN3 connects Micro-processor MCV, meanwhile, capacitance C1 and C2
It is connected in series with.
2. the driving method of laser driving circuit according to claim 1, it is characterised in that：For one of circuit
For, mos3 and mos4 alternate conductions, MCU detects output voltage, and the driving pulse that mos pipes are then adjusted according to detection voltage is wide
Degree constitutes feedback circuit to achieve the purpose that adjust output voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610213614.7A CN105742949B (en) | 2016-04-01 | 2016-04-01 | A kind of driving circuit of high power laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610213614.7A CN105742949B (en) | 2016-04-01 | 2016-04-01 | A kind of driving circuit of high power laser |
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| Publication Number | Publication Date |
|---|---|
| CN105742949A CN105742949A (en) | 2016-07-06 |
| CN105742949B true CN105742949B (en) | 2018-07-17 |
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| CN201610213614.7A Expired - Fee Related CN105742949B (en) | 2016-04-01 | 2016-04-01 | A kind of driving circuit of high power laser |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5734668A (en) * | 1992-10-07 | 1998-03-31 | Diomed Limited | Laser diode drive circuit |
| US5739643A (en) * | 1994-09-30 | 1998-04-14 | Nec Corporation | Device for supplying electric power to flashlamp and method thereof |
| 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 |
| CN204144664U (en) * | 2014-08-27 | 2015-02-04 | 华北电力大学（保定） | A kind of drive circuit for laser |
| CN205543669U (en) * | 2016-04-01 | 2016-08-31 | 华北电力大学（保定） | Drive circuit of big power laser ware |
-
2016
- 2016-04-01 CN CN201610213614.7A patent/CN105742949B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5734668A (en) * | 1992-10-07 | 1998-03-31 | Diomed Limited | Laser diode drive circuit |
| US5739643A (en) * | 1994-09-30 | 1998-04-14 | Nec Corporation | Device for supplying electric power to flashlamp and method thereof |
| 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 |
| CN204144664U (en) * | 2014-08-27 | 2015-02-04 | 华北电力大学（保定） | A kind of drive circuit for laser |
| CN205543669U (en) * | 2016-04-01 | 2016-08-31 | 华北电力大学（保定） | Drive circuit of big power laser ware |
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| CN105742949A (en) | 2016-07-06 |
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Granted publication date: 20180717 Termination date: 20210401 |