CN1645692A - Temperature control device for small semiconductor laser - Google Patents
Temperature control device for small semiconductor laser Download PDFInfo
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- CN1645692A CN1645692A CN 200410093320 CN200410093320A CN1645692A CN 1645692 A CN1645692 A CN 1645692A CN 200410093320 CN200410093320 CN 200410093320 CN 200410093320 A CN200410093320 A CN 200410093320A CN 1645692 A CN1645692 A CN 1645692A
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 38
- 230000033228 biological regulation Effects 0.000 claims abstract description 11
- 238000005070 sampling Methods 0.000 claims abstract description 6
- 230000001105 regulatory effect Effects 0.000 claims description 13
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 3
- 238000005086 pumping Methods 0.000 abstract description 7
- 230000000087 stabilizing effect Effects 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 238000006757 chemical reactions by type Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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Abstract
A temp controller for the miniature semiconductor laser of laser diode single-tube pump is composed of a temp control circuit consisting of comparator, temp sampling, temp setting, temp comparison and regulation, and a temp controller different from D/A converter and feedback analog circuit. The invention can control the working temperature of the semiconductor laser pumping laser diode and the working medium at the required working temperature, can adjust the function of stabilizing the working temperature of the laser within the range of 20-30 ℃ according to the requirement, and has the temperature error less than or equal to +/-1 ℃.
Description
Technical field:
The present invention relates to a kind of temperature regulating device that is used for semiconductor laser, specifically relate to a kind of temperature controller of small semiconductor laser that is used for the pumping of laser diode single tube.
Background technology:
Semiconductor laser is a kind of electroluminescent device, adopts the small semiconductor laser of laser diode single tube pumping to have a wide range of applications in fields such as landscape engineering and optical communication.When stable electric current was imported the diode-end-pumped laser diode, it can send the laser of certain wavelength.But work as the laser running hours because pump laser diode and working media heating, thereby cause that pumping source laser diode Output optical power reduces, centre wavelength drift and working media operation conditions change, cause the laser Output optical power to reduce, the drift of output light center frequency, even, make the laser damage owing to temperature is too high when the long-term running hours of laser.Therefore must control semiconductor laser and be operated under the stable temperature, thus the output of stabilization of semiconductor laser.For a long time, the research of the temperature regulating device of noise spectra of semiconductor lasers mainly forms two class schemes, the one, the digital-to-analogue conversion formula temperature regulating device of employing pulse-width modulator (PWM), can realize comparatively accurate temperature control, but its circuit structure is comparatively complicated, generally to relate to temperature sampling, analog-to-digital conversion, Digital Logic, digital-to-analogue conversion, a plurality of parts such as amplifying circuit and temperature regulation circuit, wherein Digital Logical Circuits part is used single-chip microcomputer even some this class device in order to realize more accurate temperature control and need to adopt computer to carry out high-end control and realizing by software algorithm more, therefore it is higher relatively that it develops cost, is not suitable for the temperature control of miniature laser.Another kind of scheme is to adopt the scheme of feedback analog circuit, but this class temperature regulating device all is the fixed temperature working point, and in a single day circuit completes, and its institute's stable working temperature of energy just is fixed up.But dissimilar lasers, the working temperature of its requirement are also different, and this class device is difficult to realize the adjustment to stabilized operating temperature.
Summary of the invention:
The objective of the invention is, a kind of temperature controller of small semiconductor laser that is used for the pumping of laser diode single tube is provided, this temperature regulating device only adopts simple analog comparator to constitute temperature-control circuit, the working temperature of diode-end-pumped laser diode and working media can be controlled on the working temperature of requirement, and the function of can be as required in 20～30 ℃ scope, regulating the stabilized operating temperature of laser, temperature error≤± 1 ℃.
For achieving the above object, the present invention adopts following technical scheme:
A kind of temperature controller of small semiconductor laser, by temperature sampling, temperature set, temperature is relatively controlled and adjustment four parts constitute, and is characterised in that total formation is:
One temperature sensor, this temperature sensor positive terminal connection+5V positive source, the positive polarity input of negative level property termination first operational amplifier of this temperature sensor and the node of second resistance, the node of negative level property input termination first resistance, the 5th resistance and the first rheostat sliding end of first operational amplifier, the other end ground connection of first resistance, the 5th resistance other end connects the output of this first operational amplifier, this output is connected with the node of the 7th resistance with wire jumper one end, the data input pin of the common port jointing temp display screen of wire jumper; First rheostatic two stiff ends, one termination+5V positive source, other end ground connection; The other end ground connection of second resistance;
The node of second operational amplifier negative level property input termination the 4th resistance and the 6th resistance, the other end ground connection of the 4th resistance, the output of another termination second operational amplifier of the 6th resistance, the output of second operational amplifier also connects the node of the other end formation of the 8th resistance and wire jumper, the node of second operational amplifier positive polarity input termination the 3rd resistance and the second rheostat sliding end, these second rheostatic two stiff ends, one section connects+the 5V positive source, other end ground connection, the other end ground connection of the 3rd resistance;
The negative level property input of the 3rd operational amplifier connects the node of the 7th resistance and the 9th resistance, the other end ground connection of the 9th resistance, the positive polarity input of the 3rd operational amplifier connects the node of the 8th resistance, the tenth resistance, the 11 resistance and electric capacity, the other end ground connection of the tenth resistance, the other end of electric capacity is connected the output of the 3rd operational amplifier with the other end of the 11 resistance, the input of the output jointing temp regulating circuit of the 3rd operational amplifier; Described first operational amplifier, second operational amplifier and the 3rd operational amplifier all adopt direct current ± 5V power supply power supply.
The formation of described temperature regulation circuit is: the positive polarity input of the 4th comparator and the 5th comparator is the input of temperature regulation circuit, be connected with the output of the 3rd comparator, the negative level property input of the 4th comparator is through the 12 grounding through resistance, the negative level of the 5th comparator property input is through the 13 grounding through resistance, the output of the 4th comparator connects the base stage that the 14 resistance connects first triode, collector electrode connection+6V the power supply of this triode+the 6V output, the emitter of first triode connects the positive pole of radiator for semiconductor, the 5th comparator output terminal connects the base stage of second triode through the 15 resistance, collector electrode connection-6V the power supply of this triode-the 6V output, the emitter of second triode connects the positive ends of radiator for semiconductor, the negative level property end of radiator for semiconductor connects the common ground end of power supply U1 and U2, the radiator for semiconductor one side contacts with the package cover of working media with laser pump source, another side is installed metal fin, and the 4th comparator and the 5th comparator all adopt ± power supply of 5V power supply.
Technique effect of the present invention is as follows:
Temperature controller of small semiconductor laser of the present invention can be stabilized in the small semiconductor laser working temperature of laser diode single tube pumping on the desired working temperature.Compare with the digital-to-analogue conversion formula temperature regulating device that adopts pulse-width modulator (PWM), the present invention does not need relative complex circuit such as digital-to-analogue conversion, Digital Logic and analog-to-digital conversion, more do not relate to the control circuit and the software program of single-chip microcomputer or computer etc., this invention only adopts the simple analog circuit to realize the function of stable small semiconductor laser working temperature.And it is different with the temperature regulating device of general employing reaction type analog circuit, this invention formula adopts relatively analog circuit, through probationary certificate, apparatus of the present invention have realized the adjustable function of control temperature, and can between 20～30 ℃, regulate the stabilized operating temperature of semiconductor laser as required, temperature error≤± 1 ℃.
Description of drawings:
Fig. 1 is a temperature controller of small semiconductor laser electrical block diagram of the present invention
Fig. 2 is a temperature regulation circuit schematic diagram of the present invention
Embodiment
Below in conjunction with accompanying drawing the present invention is elaborated, but should not limit protection scope of the present invention with this.
See also Fig. 1 earlier, Fig. 1 is a temperature controller of small semiconductor laser electrical block diagram of the present invention, as seen from the figure, temperature controller of small semiconductor laser of the present invention mainly by laser works temperature sampling part, fiducial temperature setting section, temperature relatively controls output and laser works adjustment four parts are formed.
Among Fig. 1,1 negative grade of property of operational amplifier A input connects an end and the rheostat VR1 sliding end of resistance R 1, R5 respectively.Resistance R 1 other end connects power supply zero potential earth terminal, R5 other end concatenation operation amplifier A1 output, and the A1 output also connects the end of resistance R 7 one ends and wire jumper S1, and the common port of wire jumper S1 connects the data input pin of temperature display LCD.The other two ends of rheostat VR1, one section connects+5V positive source end, another termination power zero potential earth terminal.A1 positive polarity input connects temperature sensor TS negative level property end and resistance R 2 one ends respectively, the positive level of temperature sensor TS property end connection+5V positive source end, the TS surface directly contacts with the package cover of working media with laser pump source, and resistance R 2 other ends connect power supply zero potential earth terminal.Thereby form laser works temperature sampling part jointly by operational amplifier A 1, resistance R 1, R2, R5, rheostat VR1 and temperature sensor TS.2 negative grades of property of operational amplifier A input connects the end of resistance R 4, R6 respectively.Resistance R 4 other ends connect power supply zero potential earth terminal, and resistance R 6 other ends connect the A2 output, and the A2 output also connects the other end of resistance R 8 one ends and wire jumper S1.Operational amplifier A 2 positive polarity inputs connect resistance R 3 one ends and rheostat VR2 sliding end respectively.The other two ends of rheostat VR2, one section connects+5V positive source end, and another termination power zero potential earth terminal, resistance R 3 other ends connect power supply zero potential earth terminal.Thereby form the fiducial temperature setting section jointly by operational amplifier A 2, resistance R 3, R4, R6 and rheostat VR1.When temperature is set, common port with wire jumper S1 links to each other with an end that is connected with operational amplifier A 2 outputs earlier, standardsizing rheostat VR2 slip contravention, make A2 output between 2.0～3.0V, and the laser that output voltage is numerically equal to requirement is stablized the worker and is organized 1/10 of Temperature numerical, and the laser of regulating the LCD display requirement is stablized the worker and organized temperature value.The end that the common port of wire jumper S1 is connected with operational amplifier A 1 output links to each other again, with contact temperature-measuring table contact measurement temperature sensor TS surface actual temperature, standardsizing rheostat VR1 sliding end makes the LCD displays temperature identical with the temperature measuring gauge displays temperature then.The negative level property input of operational amplifier A 3 connects the other end of resistance R 7 and an end of resistance R 9 respectively, and the other end of resistance R 9 connects power supply zero potential earth terminal.The positive polarity input of A3 connects the node of resistance R 8, resistance R 10, R11 and capacitor C 1 respectively, resistance R 10 other ends connect power supply zero potential earth terminal, the other end of capacitor C 1 is connected the output of A3 with the other end of resistance R 11, the output of A3 also connects the input of temperature regulation circuit TC.Thereby forming temperature relatively controls output jointly by operational amplifier A 3, resistance R 7, R8, R9, R10, R11 and capacitor C 1.Relatively controlling the output circuit by this realizes the laser work temperature that transducer TS observed temperature and circuit are determined is compared, export the operating state of its difference signal then, finally make laser works on stable working temperature point in order to the control temperature regulation circuit.Operational amplifier A 1, A2 and A3 all adopt direct current ± 5V power supply power supply.
Temperature regulation circuit schematic diagram such as Fig. 2.The positive polarity input of comparator A4, A5 links to each other as the input of temperature regulation circuit TC, promptly connects the output of A3, and the negative level of A4 property input connects power supply zero potential earth terminal through R12, and the negative level of A5 property input connects power supply zero potential earth terminal through resistance R 13.The A4 output connects resistance R 14 1 ends, and the R14 other end connects the base stage of triode Q1, the collector electrode connection+6V power supply U1 of Q1+the 6V output, the emitter of Q1 connects the positive ends of radiator for semiconductor COOL.The A5 output connects resistance R 15 1 ends, resistance R 15 other ends connect triode Q2 base stage, Q2 collector electrode connection-6V power supply U2-the 6V output, the Q2 emitter connects the positive ends of radiator for semiconductor COOL, and the negative level property end of radiator for semiconductor COOL connects the common ground end of power supply U1 and U2.Radiator for semiconductor COOL one side contacts with the package cover of working media with laser pump source, and another side is installed metal fin.Comparator A4 and A5 be all employing ± 5V power supply power supplies also.
The experiment proved that temperature controller of small semiconductor laser of the present invention can be stabilized in the small semiconductor laser working temperature of laser diode single tube pumping on the desired working temperature.Compare with the digital-to-analogue conversion formula temperature regulating device that adopts pulse-width modulator (PWM), the present invention does not need relative complex circuit such as digital-to-analogue conversion, Digital Logic and analog-to-digital conversion, more do not relate to the control circuit and the software program of single-chip microcomputer or computer etc., this invention only adopts the simple analog circuit to realize the function of stable small semiconductor laser working temperature.And it is different with the temperature regulating device of general employing reaction type analog circuit, this invention formula adopts relatively analog circuit, thereby can realize controlling the adjustable function of temperature, and can between 20～30 ℃, regulate the stabilized operating temperature of semiconductor laser as required, temperature error≤± 1 ℃.
Claims (2)
1, a kind of temperature controller of small semiconductor laser, by temperature sampling, temperature set, temperature is relatively controlled and adjustment four parts constitute, and is characterised in that total formation is:
One temperature sensor (TS), this temperature sensor (TS) positive terminal connection+5V positive source, the positive polarity input of negative level property termination first operational amplifier (A1) of this temperature sensor (TS) and the node of second resistance (R2), negative level property input termination first resistance (R1) of first operational amplifier (A1), the node of the 5th resistance (R5) and first rheostat (VR1) sliding end, the other end ground connection of first resistance (R1), the 5th resistance (R5) other end connects the output of this first operational amplifier (A1), this output is connected the data input pin of the common port jointing temp display screen (LCD) of wire jumper (S1) with the node of the 7th resistance (R7) with wire jumper (S1) end; Two stiff ends of first rheostat (VR1), one termination+5V positive source, other end ground connection; The other end ground connection of second resistance (R2);
The node of second operational amplifier (A2) negative level property input termination the 4th resistance (R4) and the 6th resistance (R6), the other end ground connection of the 4th resistance (R4), the output of another termination second operational amplifier (A2) of the 6th resistance (R6), the output of second operational amplifier (A2) also connects the node of the other end formation of the 8th resistance (R8) and wire jumper (S1), the node of second operational amplifier (A2) positive polarity input termination the 3rd resistance (R3) and second rheostat (VR2) sliding end, two stiff ends of this second rheostat (VR2), one section connects+the 5V positive source, other end ground connection, the other end ground connection of the 3rd resistance (R3); The negative level property input of the 3rd operational amplifier (A3) connects the node of the 7th resistance (R7) and the 9th resistance (R9), the other end ground connection of the 9th resistance (R9), the positive polarity input of the 3rd operational amplifier (A3) connects the 8th resistance (R8), the tenth resistance (R10), the node of the 11 resistance (R11) and electric capacity (C1), the other end ground connection of the tenth resistance (R10), the other end of electric capacity (C1) is connected the output of the 3rd operational amplifier (A3) with the other end of the 11 resistance (R11), the input of the output jointing temp regulating circuit (TC) of the 3rd operational amplifier (A3); Described first operational amplifier (A1), second operational amplifier (A2) and the 3rd operational amplifier (A3) all adopt direct current ± 5V power supply power supply.
2, temperature controller of small semiconductor laser according to claim 1, the formation that it is characterized in that described temperature regulation circuit (TC) is: the positive polarity input of the 4th comparator (A4) and the 5th comparator (A5) is the input of temperature regulation circuit (TC), be connected with the output of the 3rd comparator (A3), the negative level property input of the 4th comparator (A4) is through the 12 resistance (R12) ground connection, the negative level of the 5th comparator (A5) property input is through the 13 resistance (R13) ground connection, the output of the 4th comparator (A4) connects the base stage that the 14 resistance (R14) connects first triode (Q1), collector electrode connection+6V the power supply (U1) of this triode (Q1)+the 6V output, the emitter of first triode (Q1) connects the positive pole of radiator for semiconductor (COOL), the 5th comparator (A5) output connects the base stage of second triode (Q2) through the 15 resistance (R15), collector electrode connection-6V the power supply (U2) of this triode (Q2)-the 6V output, the emitter of second triode (Q2) connects the positive ends of radiator for semiconductor (COOL), the negative level property end of radiator for semiconductor (COOL) connects the common ground end of power supply U1 and U2, radiator for semiconductor (COOL) one side contacts with the package cover of working media with laser pump source, another side is installed metal fin, all employing ± 5V power supply power supplies of the 4th comparator (A4) and the 5th comparator (A5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100933202A CN1299410C (en) | 2004-12-21 | 2004-12-21 | Temperature control device for small semiconductor laser |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100933202A CN1299410C (en) | 2004-12-21 | 2004-12-21 | Temperature control device for small semiconductor laser |
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| Publication Number | Publication Date |
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| CN1645692A true CN1645692A (en) | 2005-07-27 |
| CN1299410C CN1299410C (en) | 2007-02-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100933202A Expired - Fee Related CN1299410C (en) | 2004-12-21 | 2004-12-21 | Temperature control device for small semiconductor laser |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100527036C (en) * | 2007-09-07 | 2009-08-12 | 中国科学院上海光学精密机械研究所 | Semiconductor laser temperature control system |
| CN102393766A (en) * | 2011-08-25 | 2012-03-28 | 上海致凯捷激光科技有限公司 | High-accuracy digital temperature controller |
| CN103984376A (en) * | 2014-05-14 | 2014-08-13 | 马鞍山恒瑞测量设备有限公司 | Circuit for controlling heating power of load |
| CN104731128A (en) * | 2013-12-24 | 2015-06-24 | 苏州普源精电科技有限公司 | Measuring device with temperature control function |
| CN105652918A (en) * | 2016-03-31 | 2016-06-08 | 南京铁道职业技术学院 | Laser temperature control circuit |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5604758A (en) * | 1995-09-08 | 1997-02-18 | Xerox Corporation | Microprocessor controlled thermoelectric cooler and laser power controller |
| CN1151412C (en) * | 2001-03-30 | 2004-05-26 | 中国科学院上海光学精密机械研究所 | Temperature controller for semiconductor laser |
| JP2002353550A (en) * | 2001-05-22 | 2002-12-06 | Asahi Kasei Microsystems Kk | Laser-module temperature control circuit |
-
2004
- 2004-12-21 CN CNB2004100933202A patent/CN1299410C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100527036C (en) * | 2007-09-07 | 2009-08-12 | 中国科学院上海光学精密机械研究所 | Semiconductor laser temperature control system |
| CN102393766A (en) * | 2011-08-25 | 2012-03-28 | 上海致凯捷激光科技有限公司 | High-accuracy digital temperature controller |
| CN102393766B (en) * | 2011-08-25 | 2014-04-16 | 上海致凯捷激光科技有限公司 | High-accuracy digital temperature controller |
| CN104731128A (en) * | 2013-12-24 | 2015-06-24 | 苏州普源精电科技有限公司 | Measuring device with temperature control function |
| CN103984376A (en) * | 2014-05-14 | 2014-08-13 | 马鞍山恒瑞测量设备有限公司 | Circuit for controlling heating power of load |
| CN105652918A (en) * | 2016-03-31 | 2016-06-08 | 南京铁道职业技术学院 | Laser temperature control circuit |
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| Publication number | Publication date |
|---|---|
| CN1299410C (en) | 2007-02-07 |
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