CN104485577A - Rechargeable battery powered type driving power supply for portable quantum cascade laser - Google Patents
Rechargeable battery powered type driving power supply for portable quantum cascade laser Download PDFInfo
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- CN104485577A CN104485577A CN201410764372.1A CN201410764372A CN104485577A CN 104485577 A CN104485577 A CN 104485577A CN 201410764372 A CN201410764372 A CN 201410764372A CN 104485577 A CN104485577 A CN 104485577A
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Abstract
The invention discloses a battery powered type driving power supply for a quantum cascade laser. The power supply comprises a lithium battery, a voltage-boosting module, a pulse-generating circuit, a current output module and the like. The power supply can work in either a continuous state or a pulse state; a general 2.4-4.5V lithium battery is used as the power supply and is boosted to be 5V and 15V through the voltage-boosting circuit for driving the pulse-generating circuit and the current output circuit, wherein the pulse-generating circuit can generate a square pulse with adjustable frequency and duty ratio; as being applied to a current output circuit, the pulse can generate a pulse current for driving the quantum cascade laser; or a DC signal can be applied to the current output circuit through a selecting circuit to generate continuous currents for driving the quantum cascade laser. The battery powered type driving power supply for the quantum cascade laser is small in size, low in power consumption, simple in structure, and particularly suitable for the portable quantum cascade laser.
Description
Technical field
The present invention relates to a kind of drive current source for quantum cascade laser, feature is employing can drive volume qc laser once saving common lithium battery, is a kind of low-power consumption, portable electric source module.Affiliated field is semiconductor device and electronic circuit field.
Background technology
Quantum cascade laser is at gas detect, and drugs and explosive detection, atmospheric pollution monitoring, the aspect such as infrared counteraction and terahertz imaging has a wide range of applications.Because quantum cascade laser is different from general semiconductor laser, its driving voltage higher (general more than 10V), threshold current larger (hundreds of milliampere is to more than 1A); In addition due to its conversion efficiency low (about 10%), caloric value is large, and require high to power good, so amount commonly qc laser driving power is bulky, complex structure, is difficult to the portable use realizing quantum cascade laser.
Summary of the invention
The present invention is intended to realize a kind of low-power consumption, the portable quantum cascade laser driving power of small size.This power supply is using a joint lithium battery as power supply, and both can work in the pulsing mode, under also can being operated in direct current continuous mode, output current all can regulate continuously.When working in the pulsing mode, pulse duration and duty ratio also can independently regulate.
The battery powered quantum cascade laser driving power of one provided by the invention, it comprises: battery, the first booster circuit, the second booster circuit, mode selection circuit, pulse generator and adjustable current output circuit;
Described battery connects described first booster circuit and the second booster circuit respectively;
The voltage transitions that described first booster circuit is used for described battery to export is the first voltage;
The voltage transitions that described second booster circuit is used for described battery to export is the second voltage;
The first voltage that described first booster circuit exports is used for providing working power for pulse generator;
The second voltage that described second booster circuit exports is used for providing power supply for adjustable current output circuit;
Described mode selection circuit is input to adjustable current output for selecting the first voltage of pulse voltage or the first booster circuit output produced by pulse generator, makes described adjustable current output be operated in pulse mode or DC mode;
Described adjustable current output is used for realizing Voltage-current conversion, to control the size of current be applied in quantum cascade laser.
The present invention uses independent lithium battery to provide 2.4-4.5V supply voltage, respectively through booster circuit, for pulse wave generator and current output module provide operating voltage, pulse generating circuit can produce frequency 1-10KHz, the rectangular pulse of pulse duration 1us-10us, this pulse is applied to current output circuit drive volume qc laser after bleeder circuit.Can by the size regulating above-mentioned bleeder circuit to change output current, realize the continuous adjustment of output current, adjustable range is 100mA to 1000mA.When needs work in a continuous mode time, can by input current output circuit after direct current signal dividing potential drop, produce continuous current drive volume qc laser, under DC mode, Current adjustment scope is 100mA to 500mA.
Accompanying drawing explanation
Fig. 1 is battery powered quantum cascade laser driving power structural representation in the present invention;
Fig. 2 is the electrical block diagram of 5V booster circuit in the present invention;
Fig. 3 is the electrical block diagram of 15V booster circuit in the present invention;
Fig. 4 is the electrical block diagram of pulse-generator circuit in the present invention;
Fig. 5 is the electrical block diagram of model selection and current output circuit in the present invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in further detail.
Composition graphs 1 is visible, and the portable quantum cascade laser driving power that rechargeable battery provided by the invention is powered comprises battery, the first booster circuit, the second booster circuit, mode selection circuit, pulse generator and adjustable current output circuit.Described battery branch is connected with described first booster circuit and the second booster circuit; Described battery can the lithium battery of low-voltage, and input voltage can be converted to the first stable voltage by described first booster circuit, and input voltage can be risen to the second stable voltage by described second booster circuit, and the first voltage is different with the second voltage; Such as: described first booster circuit can be 5V booster circuit, described second booster circuit can be 15V booster circuit; After described battery accesses the first booster circuit, then the input voltage of battery can be converted to the first stable voltage, after described battery accesses the second booster circuit, the input voltage of battery can be converted to the second stable voltage, described first voltage and the second voltage can be respectively pulse generator and adjustable current output provides working power.
Described mode selection circuit comprises switch and the bleeder circuit of alternative, it can select the direct voltage of pulse voltage or the first booster circuit output produced by pulse generator to be input to adjustable current output after dividing potential drop decay, described adjustable current output is made to be operated in pulse mode or DC mode, to realize Voltage-current conversion function, in order to control the size of current be applied in quantum cascade laser.
Fig. 2 is the schematic diagram of the first booster circuit in the embodiment of the present invention, illustrates for 5V booster circuit.Described lithium battery input voltage accesses the input LX pin of integrated boost chip QX2301 after electric capacity C11 decoupling and inductance L 1 filtering ripple, and between the LX pin and voltage output pin OUT of QX2301, accesses diode 1N5819 realize rectification function.The integrated boost chip QX2301 that this circuit uses is a BOOST structure, and the DC-DC booster circuit L50E of PFM control model, coordinates peripheral electric capacity, and cell voltage can be boosted to stable 5V by inductance and diode, with driving pulse wave mode circuit for generating.
Fig. 3 is the second booster circuit schematic diagram in the embodiment of the present invention, for 15V booster circuit.Described lithium battery input voltage accesses the voltage input pin VIN of integrated boost chip LM2700ADJ after electric capacity C4 and C10 decoupling, and the power switch input pin SW of this chip is connected to by inductance L 2, resonant earthed system connects pin VC ground connection behind the filtering networking that resistance R5 and electric capacity C1 forms.The He Ne laser pin FSLCT ground connection of LM2700ADJ, makes this chip operation at lower 600KHz; Its output voltage feedback input end FB pin connects by resistance R6, the dividing potential drop feedback circuit that R7 and adjustable resistance R8 forms, output decoupling capacitor C2 is connected with resistance R7 one end, and connects the SW pin of rectifier diode D2 to LM2700ADJ, forms 15V voltage output end.The integrated boost chip LM2700ADJ that this circuit uses is the DC-DC booster circuit of a BOOST type, coordinate peripheral electric capacity, inductance and diode, directly can boost to stable 15V by cell voltage, for electric current output current provides enough voltage domains of walker.
Fig. 4 is pulse wave generator circuit schematic diagram in the present invention.This circuit is made up of NE555 timer circuit and SN74123N single-shot trigger circuit.In NE555 timer circuit, the reset pin RST of NE555 chip connects supply voltage, makes it no longer reset in the course of the work; Resistance R1, R2 and electric capacity C5 forms time-base circuit, determine frequency and the duty ratio of input waveform, the trigger pin TRIG of NE555 and threshold value pin THR is connected to the junction of electric capacity C5 and resistance R2, in order to form square wave circuit for generating, its DISC pin is connected to resistance R1, the junction of R2, forms discharge loop; Pin CVOL is ground connection after electric capacity C6 decoupling, and impulse waveform is exported by output pin OUT.SN74123N circuit forms monostable flipflop, and its pin B connects the pulse output end of NE555 circuit, and pin A ground connection, realizes the continuous trigger of rectangular pulse thus; CX pin and the CX/RX pin of SN74123N are connected the two ends of electric capacity C7 respectively, and resistance R3 and electric capacity C7 form time-base circuit, for determine to trigger form the width of pulse.Pin
connect 5V voltage, trigger impulse is exported by pin Q.First this circuit uses integrated circuit (IC) chip NE555 to produce the square wave of frequency 1KHz to 10KHz, and the selection of frequency is decided by resistance R1, the value of R2 and electric capacity C5, after the value of selected R2 and C5, can be realized the selection of frequency by the value of regulating resistance R1; The single-shot trigger circuit that the input of this square wave is made up of SN74LS123, producing pulse duration is the short pulse of 1us to 10us, the pulsewidth of this pulse is decided by the value of resistance R3 and electric capacity C7, after the value of selected electric capacity C7, and can by the adjustment regulating the resistance of R3 to realize pulse duration.
Fig. 5 is the schematic diagram of mode selection circuit and adjustable current output circuit in the present invention.Mode selection circuit is by either-or switch S3 and R10, the resistance pressure-dividing network composition that R11 is formed, switch S 3 one inputs connect 5V direct voltage, another input connects the pulse signal exported by pulse generator, can select to connect direct current 5V voltage to export to realize system dc electric current, or select make pulse signal to export with the pulse current realizing system, resistance R10 and R11 forms the adjustment that bleeder circuit realizes applied signal voltage value.Adjustable current output circuit is made up of integrated operational amplifier AD8032 and N-channel MOS pipe NDT455N.The voltage of the in-phase input end connection mode selection circuit output of AD8032, inverting input is after the feedback network that resistance R9 and electric capacity C8 is formed, connect sampling resistor R13, its output is then connected to the grid of metal-oxide-semiconductor NDT455N after resistance R12, to control the electric current of metal-oxide-semiconductor.Based on the principle of integrated operational amplifier " empty end-empty disconnected ", the voltage signal of in-phase input end is applied on sampling resistor R13, produces the electric current being proportional to input signal, thus achieves Voltage-current conversion function.The drain electrode of metal-oxide-semiconductor NDT455N connects the negative pole of quantum cascade laser, and the positive pole of quantum cascade laser is connected to the voltage output end of 15V booster circuit.With quantum cascade laser and electric capacity C15 and C9 connected is used for improving the waveform of pulse current, the diode D4 of reversal connection is used to prevent reverse voltage excessive and damage quantum cascade laser.
Above-described specific embodiment; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a battery powered quantum cascade laser driving power, is characterized in that, comprising: battery, the first booster circuit, the second booster circuit, mode selection circuit, pulse generator and adjustable current output circuit;
Described battery connects described first booster circuit and the second booster circuit respectively;
The voltage transitions that described first booster circuit is used for described battery to export is the first voltage;
The voltage transitions that described second booster circuit is used for described battery to export is the second voltage;
The first voltage that described first booster circuit exports is used for providing working power for pulse generator;
The second voltage that described second booster circuit exports is used for providing power supply for adjustable current output circuit;
Described mode selection circuit is input to adjustable current output for selecting the first voltage of pulse voltage or the first booster circuit output produced by pulse generator, makes described adjustable current output be operated in pulse mode or DC mode;
Described adjustable current output is used for realizing Voltage-current conversion, to control the size of current be applied in quantum cascade laser.
2. driving power as claimed in claim 1, wherein, described driving power is current source.
3. driving power as claimed in claim 1, wherein, the circuit structure of described first booster circuit is: the input voltage of battery accesses the input of integrated boost chip after (C11) decoupling of the first electric capacity and the first inductance (L1) filtering ripple, accesses diode (1N5819) and realize rectification function between the input of described integrated boost chip and voltage output end.
4. driving power as claimed in claim 1, wherein, the circuit structure of described second booster circuit is: the input voltage of battery accesses the input of integrated boost chip after the second electric capacity (C4) and the 3rd electric capacity (C10) decoupling, and be connected to the SW pin of described integrated boost chip by the second inductance (L2), pin VC ground connection behind the filtering networking that the first resistance (R5) and the 4th electric capacity (C1) form; The He Ne laser pin ground connection of described integrated boost chip, output voltage feedback input end pin (FB) connects the dividing potential drop feedback circuit be made up of the second resistance (R6), the 3rd resistance (R7) and adjustable resistance (R8), the output decoupling capacitor (C2) of described integrated boost chip is connected with the 3rd resistance (R7) one end, and connect the SW pin of rectifier diode (D2) to described integrated boost chip, form the output of the second potential circuit.
5. driving power as claimed in claim 1, wherein, described pulse generator comprises timer circuit and single-shot trigger circuit; The trigger pin (TRIG) of described timer and threshold value pin (THR) are connected to the junction of the 5th resistance (R2) and the 5th electric capacity (C5), to form square wave circuit for generating, the electric discharge pin (DISC) of described timer is connected to the junction of the 4th resistance (R1) and the 5th resistance (R2), forms discharge loop; The time-base circuit that described 4th resistance (R1), the 5th resistance (R2) and the 5th electric capacity (C5) are formed; Control voltage pin (CVOL) ground connection after the 6th electric capacity (C6) decoupling of described timer, impulse waveform is exported by the output pin (OUT) of described timer; The triggering input pin (B) of described monostable flipflop connects the output pin (OUT) of described timer, triggers input pin (A) ground connection; External capacitor pin (CX) and the external capacitor/resistance pins (CX/RX) of described monostable flipflop are connected the two ends of the 7th electric capacity (C7) respectively, 6th resistance (R3) and the 7th electric capacity (C7) form time-base circuit, for determine to trigger form the width of pulse; The removing pin of described monostable flipflop
connect 5V voltage, trigger impulse is exported by output pin (Q).
6. driving power as claimed in claim 5, wherein, when adjustable current output is operated in pulse mode, pulse repetition frequency can be regulated by the value of change the 4th resistance (R1), the 5th resistance (R2) and the 5th electric capacity (C5), and operating frequency is 1KHz to 10KHz; Pulse duration can be regulated by the value of change the 6th resistance (R3) and the 7th electric capacity (C7), and pulse width range is 1us to 10us.
7. driving power as claimed in claim 1, wherein, described adjustable current output circuit comprises integrated operational amplifier, metal-oxide-semiconductor and current/charge-voltage convertor; The voltage of the in-phase input end connection mode selection circuit output of described integrated operational amplifier, inverting input is after the feedback network that the 7th resistance (R9) and the 8th electric capacity (C8) are formed, connect sampling resistor (R13), its output is then connected to the grid of metal-oxide-semiconductor after the 8th resistance (R12), to control the electric current of metal-oxide-semiconductor; The drain electrode of metal-oxide-semiconductor connects the negative pole of quantum cascade laser.
8. driving power as claimed in claim 1, wherein, described mode selection circuit comprises either-or switch (S3) and bleeder circuit, and described bleeder circuit comprises the 9th resistance (R10) and the tenth resistance (R11).
9. driving power as claimed in claim 8, wherein, the current value that described adjustable current output exports is determined by the value of the tenth resistance (R11).
10. the driving power as described in any one of claim 1-9, wherein, described first booster circuit is 5V booster circuit, and described second booster circuit is 15V booster circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410764372.1A CN104485577A (en) | 2014-12-11 | 2014-12-11 | Rechargeable battery powered type driving power supply for portable quantum cascade laser |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410764372.1A CN104485577A (en) | 2014-12-11 | 2014-12-11 | Rechargeable battery powered type driving power supply for portable quantum cascade laser |
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| CN104485577A true CN104485577A (en) | 2015-04-01 |
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| CN201410764372.1A Pending CN104485577A (en) | 2014-12-11 | 2014-12-11 | Rechargeable battery powered type driving power supply for portable quantum cascade laser |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113078803A (en) * | 2021-05-07 | 2021-07-06 | 苏州苏信环境科技有限公司 | Continuous power supply circuit of semiconductor laser |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020064198A1 (en) * | 2000-11-27 | 2002-05-30 | Hideshi Koizumi | Semiconductor laser device having a circuit for protecting semiconductor laser element from static electricity |
| US20100290494A1 (en) * | 2007-03-12 | 2010-11-18 | Marsland Jr Rob | Quantum cascade laser suitable for portable applications |
| US20100329293A1 (en) * | 2009-06-26 | 2010-12-30 | Battelle Memorial Institute | Methods and Apparatus for Efficient, Low-noise, Precision Current Control |
| CN201726313U (en) * | 2010-06-02 | 2011-01-26 | 青岛海信电器股份有限公司 | Voltage-boosting circuit and liquid crystal driving circuit with the same |
| CN102946049A (en) * | 2012-11-15 | 2013-02-27 | 电子科技大学 | Drive and temperature control circuit of quantum cascade laser |
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2014
- 2014-12-11 CN CN201410764372.1A patent/CN104485577A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020064198A1 (en) * | 2000-11-27 | 2002-05-30 | Hideshi Koizumi | Semiconductor laser device having a circuit for protecting semiconductor laser element from static electricity |
| US20100290494A1 (en) * | 2007-03-12 | 2010-11-18 | Marsland Jr Rob | Quantum cascade laser suitable for portable applications |
| US20100329293A1 (en) * | 2009-06-26 | 2010-12-30 | Battelle Memorial Institute | Methods and Apparatus for Efficient, Low-noise, Precision Current Control |
| CN201726313U (en) * | 2010-06-02 | 2011-01-26 | 青岛海信电器股份有限公司 | Voltage-boosting circuit and liquid crystal driving circuit with the same |
| CN102946049A (en) * | 2012-11-15 | 2013-02-27 | 电子科技大学 | Drive and temperature control circuit of quantum cascade laser |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113078803A (en) * | 2021-05-07 | 2021-07-06 | 苏州苏信环境科技有限公司 | Continuous power supply circuit of semiconductor laser |
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