CN204538461U - A kind of drive circuit for laser - Google Patents
A kind of drive circuit for laser Download PDFInfo
- Publication number
- CN204538461U CN204538461U CN201520209995.2U CN201520209995U CN204538461U CN 204538461 U CN204538461 U CN 204538461U CN 201520209995 U CN201520209995 U CN 201520209995U CN 204538461 U CN204538461 U CN 204538461U
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- resistance
- electrically connected
- laser
- circuit
- thermistor
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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
- H01S5/04—Processes or apparatus for excitation, e.g. pumping, e.g. by electron beams
- H01S5/042—Electrical excitation ; Circuits therefor
Abstract
The utility model belongs to electronic circuit technology field, be specifically related to a kind of drive circuit for laser, comprise the battery connected in turn, DC-DC power source change-over circuit, drive circuit, laser diode, also comprise voltage-regulation testing circuit, described voltage-regulation testing circuit is electrically connected with DC-DC power source change-over circuit, for detection laser diode temperature and temperature information is converted into the signal of telecommunication, feed back to DC-DC power source change-over circuit; Therefore; this drive circuit for laser; can environmentally temperature regulation output power; when low temperature or high temperature, the voltage of drive circuit can be regulated according to the temperature conditions of reality, guarantees that laser normally works; realize the stable output of laser power; save electric energy, and drive circuit components and parts can be protected well, increase the service life.
Description
Technical field
The utility model belongs to electronic circuit technology field, is specifically related to a kind of drive circuit for laser.
Background technology
First laser is born in 1960 in the world, China developed First laser in 1961, over more than 40 year, laser technology and application development swift and violent, combine with multiple subject and formed multiple applied technical field, such as photoelectric technology, laser medicine and photon biology, laser processing technology, laser detection and measurement technology, laser holography, laser spectral analysis technology, nonlinear optics, ultrafast laser, laser chemistry, quantum optices, laser radar, laser guidance, laser isotope separation, laser controllable nuclear fusion, laser weapon etc.The appearance of these interleaving techniquess and new subject, has promoted the development of conventional industries and new industry widely.
The work of control laser stabilization uses APC drive circuit, and (laser intensity change is fed back to drive circuit by the PD utilizing laser tube to carry or additional PD, and drive circuit change flows through the electric current of laser diode to reach the constant drive circuit of Laser output luminous power.
Prior art drives green laser diode with APC drive circuit, and green semiconductor laser diode is because of its special manufacture craft, and in its operating temperature range, operating voltage alters a great deal.From low temperature to high temperature, laser tube voltage (can be down to 5V from 9V) declines 40%.
But the voltage being available to APC drive circuit is constant voltage, such as, 7V voltage power supply is provided, normal at normal temperature or high temperature APC circuit working, but during low temperature, laser diode self operating voltage is more than 7V, APC drive circuit cannot provide the operating voltage more than 7V, laser tube cannot normally work, and laser power will decline, and cannot realize the stable output of laser power.Again or, a driving power exceeding laser tube maximum operating voltage is provided, 9V power supply is such as provided, can ensure that Green-emitting semiconductor laser tube can the luminous power of stable output by APC circuit within the scope of total temperature.But laser tube operating voltage reduces when normal temperature or high temperature, the power of extra voltage transitions becomes reactive power (be used for heating), and this will affect the life-span of laser diode and drive circuit components and parts thereof, causes the waste of electric energy simultaneously.
In a word, existing drive circuit for laser also exists with the under powered defect of ambient temperature regulation output, easily affects the life-span of drive circuit components and parts, the shortcoming of waste electric energy.
Utility model content
The purpose of this utility model overcomes existing drive circuit for laser to exist with the under powered defect of ambient temperature regulation output, easily affects the life-span of drive circuit components and parts, the problem of waste electric energy.
For this reason, the utility model provides a kind of drive circuit for laser, comprise the battery connected in turn, DC-DC power source change-over circuit, drive circuit, laser diode, also comprise voltage-regulation testing circuit, described voltage-regulation testing circuit is electrically connected with DC-DC power source change-over circuit, for detection laser diode temperature and temperature information is converted into the signal of telecommunication, feed back to DC-DC power source change-over circuit.
Above-mentioned voltage-regulation testing circuit comprises resistance R2, thermistor R25, resistance R3; Described resistance R2 one end is connected with DC-DC power source change-over circuit output VOUT, and the other end is electrically connected with one end of thermistor R25, and the other end of thermistor R25 is electrically connected with one end of resistance R3, and the other end of resistance R3 is electrically connected with earth terminal; Thermistor R25 is also electrically connected with the pressure feedback port FB of DC-DC power source change-over circuit with the junction of resistance R3.
Above-mentioned thermistor R25 is negative tempperature coefficient thermistor.
Above-mentioned voltage-regulation testing circuit can also be by resistance R2, thermistor R26, and resistance R3 forms; Described resistance R2 one end is electrically connected with DC-DC power source change-over circuit output VOUT, and the other end is electrically connected with one end of thermistor R26, and the other end of thermistor R26 is electrically connected with one end of resistance R3, and the other end of resistance R3 is electrically connected with earth terminal; Resistance R2 is also electrically connected with the pressure feedback port FB of DC-DC power source change-over circuit with the junction of thermistor R26.
Described thermistor R26 is semistor.
Described drive circuit for laser, also comprises voltage conversion circuit, for providing the electric energy meeting voltage-regulation testing circuit operating voltage; Described voltage conversion circuit comprises power conversion chip U2, electric capacity C6; Pin one, the pin 5 of described power conversion chip U2 are all electrically connected with DC-DC power source change-over circuit output VOUT, and pin 3 is electrically connected with earth terminal, and pin 4 is output VOUT1, and electric capacity C6 is connected between output VOUT1 and earth terminal.
Above-mentioned voltage-regulation testing circuit comprises thermistor R21, resistance R22, resistance R23, resistance R24, MCU control chip U3, and electric capacity C21, one end of described thermistor R21 is electrically connected with change-over circuit output VOUT1, the other end is electrically connected with earth terminal by resistance R23, resistance R21 is also electrically connected with the pin 3 of MCU control chip U3 with the junction of resistance R23, one end of resistance R24 is electrically connected with DC-DC power source change-over circuit output VOUT, the other end is electrically connected with earth terminal by electric capacity C21, described resistance R24 is electrically connected with the pin 3 of MCU control chip U3 by resistance R22 with the junction of electric capacity C21, above-mentioned resistance R24 and electric capacity C21 are also electrically connected with the pressure feedback port FB of DC-DC power source change-over circuit.
The beneficial effects of the utility model: this drive circuit for laser that the utility model provides, comprise the battery connected in turn, DC-DC power source change-over circuit, drive circuit, laser diode, also comprises voltage-regulation testing circuit, and described voltage-regulation testing circuit is electrically connected with DC-DC power source change-over circuit, for detection laser diode temperature and temperature information is converted into the signal of telecommunication, feed back to DC-DC power source change-over circuit; Therefore, this drive circuit for laser, can environmentally temperature regulation output power, when low temperature or high temperature, the voltage of drive circuit can be regulated according to the temperature conditions of reality, guarantees that laser normally works, realize the stable output of laser power, save electric energy, and drive circuit components and parts can be protected well, increase the service life; Adopt negative tempperature coefficient thermistor that laser diode temperature information is converted to the signal of telecommunication and directly feed back to DC-DC power source change-over circuit, output voltage is regulated, such circuit is simple, adjustment efficiency is high, the temperature of the very first time to laser diode can make adjustment, ensure its power output, reduce ambient temperature to the impact of laser diode operating efficiency; MCU control chip is adopted to process the temperature information gathered, then DC-DC power source change-over circuit is fed back to, can according to the difference of laser works environment, set different parameters, regulate the operating voltage of laser diode, enable its power output be in optimum state always, and can filtering environmental temperature jump, cause the impact that laser diode output voltage suddenlys change on its work.
Below with reference to accompanying drawing, the utility model is described in further details.
Accompanying drawing explanation
Fig. 1 is drive circuit for laser theory diagram.
Fig. 2 is DC-DC power source change-over circuit electrical connection schematic diagram.
Fig. 3 is drive circuit and laser diode connecting circuit figure.
Fig. 4 drive circuit is connected alternative plan circuit diagram with laser diode.
Fig. 5 is voltage-regulation testing circuit schematic diagram.
Fig. 6 is voltage-regulation testing circuit alternative plan schematic diagram.
Fig. 7 voltage-regulation testing circuit third program schematic diagram.
Fig. 8 is voltage conversion circuit figure.
Embodiment
Reaching for setting forth the utility model further the technological means and effect that predetermined object takes, below in conjunction with drawings and Examples to embodiment of the present utility model, architectural feature and effect thereof, being described in detail as follows.
Embodiment 1:
DC-DC power source transducer is the source element that a kind of efficiency is very high, and this element has a FB(Voltage Feedback usually) pin is used for monitoring the situation of change of output end voltage.If the voltage signal of change passes in chip by output voltage change feedback pin, chip can regulate internal signal to make output voltage stabilization arrive the voltage of original setting.If monitor the change of laser works ambient temperature with temperature sensor, thus adjust the output voltage of DC-DC; When temperature raises, by changing the voltage signal of FB, just reduce the output voltage of DC-DC; Otherwise, when temperature reduces, increase the output voltage of DC-DC.
According to this principle, the utility model provides a kind of drive circuit for laser as shown in Figure 1, comprise the battery connected in turn, DC-DC power source change-over circuit, drive circuit, laser diode, also comprise voltage-regulation testing circuit, described voltage-regulation testing circuit is electrically connected with DC-DC power source change-over circuit, for detection laser diode temperature and temperature information is converted into the signal of telecommunication, feed back to DC-DC power source change-over circuit, wherein DC-DC power source change-over circuit as shown in Figure 2, and drive circuit and laser two connecting circuit are as shown in Figure 3; So just can carry out Real-time Feedback to the operating ambient temperature of laser diode, according to the different adjustment electric power output voltage of temperature, guarantee that laser normally works; realize the stable output of laser power; save electric energy, and drive circuit components and parts can be protected well, increase the service life.
As shown in Figure 5, above-mentioned voltage-regulation testing circuit comprises resistance R2, thermistor R25, resistance R3; Described resistance R2 one end is connected with DC-DC power source change-over circuit output VOUT, and the other end is electrically connected with one end of thermistor R25, and the other end of thermistor R25 is electrically connected with one end of resistance R3, and the other end of resistance R3 is electrically connected with earth terminal; Thermistor R25 is also electrically connected with the pressure feedback port FB of DC-DC power source change-over circuit with the junction of resistance R3; The thermistor R25 used is negative tempperature coefficient thermistor (NTC thermistor).
Laser diode temperature information is converted to the signal of telecommunication and directly feeds back to DC-DC power source change-over circuit, output voltage is regulated, such circuit is simple, adjustment efficiency is high, the temperature of the very first time to laser diode can make adjustment, ensure its power output, reduce ambient temperature to the impact of laser diode operating efficiency.
Embodiment 2:
What above-described embodiment adopted is the thermistor of negative temperature coefficient, if be converted to by voltage detecting circuit as shown in Figure 6, namely voltage detecting circuit is by resistance R2, thermistor R26, resistance R3 forms, and can realize the function of the regulation output voltage described in above-described embodiment equally.
Described resistance R2 one end is electrically connected with DC-DC power source change-over circuit output VOUT, and the other end is electrically connected with one end of thermistor R26, and the other end of thermistor R26 is electrically connected with one end of resistance R3, and the other end of resistance R3 is electrically connected with earth terminal; Resistance R2 is also electrically connected with the pressure feedback port FB of DC-DC power source change-over circuit with the junction of thermistor R26.
Embodiment 3:
From above-described embodiment 1,2 different, the drive circuit for laser that the present embodiment provides, also comprises voltage conversion circuit, for providing the electric energy meeting voltage-regulation testing circuit operating voltage, as shown in Figure 8, described voltage conversion circuit comprises power conversion chip U2, electric capacity C6; Pin one, the pin 5 of described power conversion chip U2 are all electrically connected with DC-DC power source change-over circuit output VOUT, and pin 3 is electrically connected with earth terminal, and pin 4 is output VOUT1, and electric capacity C6 is connected between output VOUT1 and earth terminal.
In addition; drive circuit described in the present embodiment and laser two connecting circuit are as shown in Figure 4; Real-time Feedback can be carried out equally to the operating ambient temperature of laser diode; according to the different adjustment electric power output voltage of temperature; guarantee that laser normally works, realize the stable output of laser power, save electric energy; and drive circuit components and parts can be protected well, increase the service life.
Described voltage-regulation testing circuit as shown in Figure 7, comprises thermistor R21, resistance R22, resistance R23, resistance R24, MCU control chip U3, and electric capacity C21, one end of described thermistor R21 is electrically connected with change-over circuit output VOUT1, the other end is electrically connected with earth terminal by resistance R23, resistance R21 is also electrically connected with the pin 3 of MCU control chip U3 with the junction of resistance R23, one end of resistance R24 is electrically connected with DC-DC power source change-over circuit output VOUT, the other end is electrically connected with earth terminal by electric capacity C21, described resistance R24 is electrically connected with the pin 3 of MCU control chip U3 by resistance R22 with the junction of electric capacity C21, above-mentioned resistance R24 and electric capacity C21 are also electrically connected with the pressure feedback port FB of DC-DC power source change-over circuit.
Described thermistor R21, be not limited to and use which kind of thermistor, even temperature sensor can be replaced with, only the temperature information of laser diode need be converted to the signal of telecommunication, after conversion, be sent to MCU control chip U3, through the judgement of MCU control chip U3, send pwm signal or the D/A signal of regulation voltage, control the feedback voltage signal that DC-DC power source change-over circuit receives, thus reach the object of the operating voltage regulating laser diode, this scheme not only can regulate the operating voltage of laser diode in real time, and can according to the difference of laser works environment, set different parameters, regulate the operating voltage of laser diode, enable its power output be in optimum state always, and can filtering environmental temperature jump, cause the impact that laser diode output voltage suddenlys change on its work.
Above content is in conjunction with concrete preferred implementation further detailed description of the utility model, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, some simple deduction or replace can also be made, all should be considered as belonging to protection range of the present utility model.
Claims (7)
1. a drive circuit for laser, comprise the battery connected in turn, DC-DC power source change-over circuit, drive circuit, laser diode, is characterized in that: also comprise voltage-regulation testing circuit, and described voltage-regulation testing circuit is electrically connected with DC-DC power source change-over circuit, for detection laser diode temperature and temperature information is converted into the signal of telecommunication, feed back to DC-DC power source change-over circuit.
2. drive circuit for laser as claimed in claim 1, is characterized in that: described voltage-regulation testing circuit comprises resistance R2, thermistor R25, resistance R3; Described resistance R2 one end is electrically connected with DC-DC power source change-over circuit output VOUT, and the other end is electrically connected with one end of thermistor R25, and the other end of thermistor R25 is electrically connected with one end of resistance R3, and the other end of resistance R3 is electrically connected with earth terminal; Thermistor R25 is also electrically connected with the pressure feedback port FB of DC-DC power source change-over circuit with the junction of resistance R3.
3. drive circuit for laser as claimed in claim 2, is characterized in that: described thermistor R25 is negative tempperature coefficient thermistor.
4. drive circuit for laser as claimed in claim 1, is characterized in that: described voltage-regulation testing circuit comprises resistance R2, thermistor R26, resistance R3; Described resistance R2 one end is electrically connected with DC-DC power source change-over circuit output VOUT, and the other end is electrically connected with one end of thermistor R26, and the other end of thermistor R26 is electrically connected with one end of resistance R3, and the other end of resistance R3 is electrically connected with earth terminal; Resistance R2 is also electrically connected with the pressure feedback port FB of DC-DC power source change-over circuit with the junction of thermistor R26.
5. drive circuit for laser as claimed in claim 4, is characterized in that: described thermistor R26 is semistor.
6. drive circuit for laser as claimed in claim 1, is characterized in that: also comprise voltage conversion circuit, for providing the electric energy meeting voltage-regulation testing circuit operating voltage; Described voltage conversion circuit comprises power conversion chip U2, electric capacity C6; Pin one, the pin 5 of described power conversion chip U2 are all electrically connected with DC-DC power source change-over circuit output VOUT, and pin 3 is electrically connected with earth terminal, and pin 4 is output VOUT1, and electric capacity C6 is connected between output VOUT1 and earth terminal.
7. the drive circuit for laser as described in claim 1 or 6, is characterized in that: described voltage-regulation testing circuit comprises thermistor R21, resistance R22, resistance R23, resistance R24, MCU control chip U3, and electric capacity C21, one end of described thermistor R21 is electrically connected with change-over circuit output VOUT1, the other end is electrically connected with earth terminal by resistance R23, resistance R21 is also electrically connected with the pin 3 of MCU control chip U3 with the junction of resistance R23, one end of resistance R24 is electrically connected with DC-DC power source change-over circuit output VOUT, the other end is electrically connected with earth terminal by electric capacity C21, described resistance R24 is electrically connected with the pin 3 of MCU control chip U3 by resistance R22 with the junction of electric capacity C21, above-mentioned resistance R24 and electric capacity C21 are also electrically connected with the pressure feedback port FB of DC-DC power source change-over circuit.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520209995.2U CN204538461U (en) | 2015-04-09 | 2015-04-09 | A kind of drive circuit for laser |
| PCT/CN2016/076322 WO2016161874A1 (en) | 2015-04-09 | 2016-03-14 | Laser drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520209995.2U CN204538461U (en) | 2015-04-09 | 2015-04-09 | A kind of drive circuit for laser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204538461U true CN204538461U (en) | 2015-08-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520209995.2U Active CN204538461U (en) | 2015-04-09 | 2015-04-09 | A kind of drive circuit for laser |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN204538461U (en) |
| WO (1) | WO2016161874A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016161874A1 (en) * | 2015-04-09 | 2016-10-13 | 西安华科光电有限公司 | Laser drive circuit |
| CN107393562A (en) * | 2017-08-25 | 2017-11-24 | 国网浙江省电力公司宁波供电公司 | A kind of new laser generator drive circuit |
| CN109901638A (en) * | 2019-04-19 | 2019-06-18 | 洛阳顶扬光电技术有限公司 | A kind of APD reverse biased temperature self-adaptation circuit suitable for laser ranging |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112083752A (en) * | 2020-09-03 | 2020-12-15 | 索尔思光电（成都）有限公司 | Optical transceiving system, module and method based on self-adaptive voltage regulation |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02109384A (en) * | 1988-10-18 | 1990-04-23 | Mitsubishi Electric Corp | Optical-output stabilizing apparatus for semiconductor laser |
| JPH08340144A (en) * | 1995-06-09 | 1996-12-24 | Hitachi Cable Ltd | Semiconductor laser diode drive circuit |
| US20090040904A1 (en) * | 2003-11-18 | 2009-02-12 | Toshio Matsumoto | Laser Driving Device, Optical Head Incorporating Laser Driving Device, and Optical Disk Apparatus |
| JP2009111730A (en) * | 2007-10-30 | 2009-05-21 | Sumitomo Electric Ind Ltd | Optical transmitter and control method therefor |
| CN101956724B (en) * | 2009-07-13 | 2013-07-03 | 中国长城计算机深圳股份有限公司 | Fan drive device and fan system |
| CN202018609U (en) * | 2011-03-07 | 2011-10-26 | 上海逸航汽车零部件有限公司 | Electronic thermostat |
| CN204538461U (en) * | 2015-04-09 | 2015-08-05 | 西安华科光电有限公司 | A kind of drive circuit for laser |
-
2015
- 2015-04-09 CN CN201520209995.2U patent/CN204538461U/en active Active
-
2016
- 2016-03-14 WO PCT/CN2016/076322 patent/WO2016161874A1/en active Application Filing
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016161874A1 (en) * | 2015-04-09 | 2016-10-13 | 西安华科光电有限公司 | Laser drive circuit |
| CN107393562A (en) * | 2017-08-25 | 2017-11-24 | 国网浙江省电力公司宁波供电公司 | A kind of new laser generator drive circuit |
| CN109901638A (en) * | 2019-04-19 | 2019-06-18 | 洛阳顶扬光电技术有限公司 | A kind of APD reverse biased temperature self-adaptation circuit suitable for laser ranging |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2016161874A1 (en) | 2016-10-13 |
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