CN104319622A - Small driving circuit of continuous light output laser device - Google Patents
Small driving circuit of continuous light output laser device Download PDFInfo
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- CN104319622A CN104319622A CN201410661754.1A CN201410661754A CN104319622A CN 104319622 A CN104319622 A CN 104319622A CN 201410661754 A CN201410661754 A CN 201410661754A CN 104319622 A CN104319622 A CN 104319622A
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Abstract
The invention relates to a small driving circuit of a continuous light output laser device. The small driving circuit of the continuous light output laser device comprises an automatic power control circuit and an automatic temperature control circuit. The automatic power control circuit is composed of an ADN2830 chip, a fourth pin of the ADN2830 chip is connected with a backlight detection diode of the laser device, and current output of a twenty-eighth pin and a thirty-first pin is adjusted through the ADN2830 chip according to voltage changes of the fourth pin to form closed-loop control, so that the purpose of stable output power of the laser device is achieved. The automatic temperature control circuit is composed of an ADN8830 chip, a working parameter detection circuit is composed of an operational amplifier TLV2374, the output of a twenty-fourth pin of the ADN2830 chip is the LD bias current detection output of the laser device, is connected with a resistor R4 for converting current into voltage and connected to a resistor R8, and then is achieved after being amplified by an amplifying circuit composed of a resistor R1, a resistor R6, the resistor R8, a resistor R43 and the operational amplifier TLV2374. The driving circuit comprises the automatic power control circuit, the automatic temperature control circuit and the working parameter detection circuit and is easy to debug, small in size, stable and reliable in working and capable of completing driving of the continuous light output laser device used for communication.
Description
Technical field
The present invention relates to semiconductor laser device driving circuit, particularly one miniaturized continuous light output laser drive circuit.Its circuit is simple, and working stability is reliable, can be widely used in fiber optic communication field.
Background technology
Semiconductor laser, as the light source of optical fiber communication, in the communication equipments such as digital optical, simulated light communication, fiber amplifier, plays a part indispensable.In such applications, the output of stable luminous power, wavelength and high reliability are the basic demands of light source.Therefore, must the reliable drive circuit of design stability.
At present, on market, existing drive circuit is all adopt the discrete device such as amplifier, triode substantially, and build automated power control, automatic temp. controlling circuit and protective circuit, circuit volume is large, and debugging difficulty is large.
Summary of the invention
Object of the present invention is exactly not enough for existing drive circuit, a kind of miniaturized continuous light output laser drive circuit is provided, the present invention selects automated power to control and automatic temperature-adjusting control integration circuit chip, complete the drive circuit design of laser, little in the hope of reaching drive circuit for laser volume, working stability is reliable.
The present invention is realized by such technical scheme: miniaturized continuous light output laser drive circuit, is characterized in that, comprises automatic power control circuitry and automatic temp. controlling circuit two parts, and two parts circuit is independent separately;
Described automatic power control circuitry is made up of continuous-wave laser average power controller and ADN2830 chip, the backlight of the 4th pin connecting laser of ADN2830 chip detects diode, ADN2830 chip is according to the change in voltage of 4 pin, the electric current of 28 pin and 31 pin is regulated to export, form closed-loop control, reach the object that laser output power is stable, 23 pin, 24 pin of ADN2830 chip provide laser bias current output detections, and 26 pin of ADN2830 chip provide backlight to detect the current detecting of diode; 19 pin are that laser LD damages or aging instruction exports, and provide indicator light by metal-oxide-semiconductor Q2 and light-emitting diode V4, if this lamp is bright, then represent that laser damages;
metal-oxide-semiconductor Q1, MOS pipe Q3 and peripheral circuit thereof control the closedown of laser LD and open; 2 pin connect resistance to earth and arrange driving maximum current, prevent laser LD from damaging;
Described automatic temp. controlling circuit is made up of automatic temperature-adjusting control chip ADN8830, comprise in addition: the thermistor of resistance R17, R18, R19 and laser LD inside forms resistance bridge, it exports 2 pin and 4 pin that are connected to automatic temperature-adjusting control chip ADN8830 chip, its value size reflects the difference that namely target temperature that determined by resistance R17 and resistance R19 and actual temperature are reflected by thermistor, difference is larger, and temperature difference is larger; ADN8830 chip is according to this difference, through internal arithmetic, control the voltage difference of 9 pin and 19 pin, the PAL system cooler that between 9 pin and 19 pin, connecting laser LD is inner integrated is PAL system cooler between 6 and 7 pins of U3 and laser LD, voltage is larger, the electric current flowing through PAL system cooler is larger, refrigeration or heating effect more obvious, thus reach the object of control LD temperature, wherein U4 and U5 is N-type metal-oxide-semiconductor and P type metal-oxide-semiconductor, plays the object of amplifying refrigeration electric current.
Described running parameter testing circuit is made up of amplifier TLV2374,24 pin of ADN2830 chip export and export for laser LD bias current detects, current transformation is voltage by its contact resistance R4, be connected to resistance R8, export after the amplifying circuit be made up of amplifies resistance R1, R6, R8, R43 and amplifier TLV2374;
6 pin of ADN2830 chip export and export for laser backlight detects diode detection, current transformation is voltage by its contact resistance R16, be connected to resistance R7, by resistance R2, R3, R7, the amplifying circuit of R42 and amplifier TLV2374 composition amplifies rear output, 31 pin of ADN8830 chip export as LD temperature detection exports, be connected to resistance R37, by resistance R32, R34, the amplifying circuit of R37 and amplifier TLV2374 composition amplifies rear output, refrigeration electric current is realized by resistance R22, refrigeration current flowing resistance R22, R22 two ends produce pressure drop, be connected to by R33, R35, R36, the differential amplifier circuit of R38 and amplifier TLV2374 composition amplifies rear output.
Beneficial effect of the present invention: this drive circuit for laser possesses automatic power control circuitry, automatic temp. controlling circuit and running parameter testing circuit, integrated circuit (IC) chip is all had to complete, circuit realiration, debugging are simply, volume is little, working stability is reliable, can complete the driving of communication continuous light output laser.
Accompanying drawing explanation
Fig. 1, be automatic power control circuitry figure;
Fig. 2, be automatic temperature-adjusting control chip ADN8830 and peripheral circuit diagram;
Fig. 3, be in automatic temp. controlling circuit, amplify refrigeration current segment circuit diagram;
Fig. 4, be running parameter testing circuit figure.
Embodiment
For a more clear understanding of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and embodiments:
Automatic power control circuitry as shown in Figure 1, wherein core devices ADN2830 chip completes automated power control, the backlight of the 4th pin connecting laser of ADN2830 chip detects diode, ADN2830 chip is according to the change in voltage of 4 pin, the electric current of 28 pin and 31 pin is regulated to export, form closed-loop control, reach the object that laser output power is stable.23 pin, 24 pin provide laser bias current output detections, and 6 pin provide backlight to detect the current detecting of diode.19 pin are that LD damages or aging instruction exports, Q2 and V4 provides indicator light, and this lamp is bright, represents that laser damages.The closedown of Q1, Q3 and peripheral circuit control LD thereof and opening.2 pin connect resistance to earth and arrange driving maximum current, prevent LD from damaging.
Automatic temp. controlling circuit as shown in Figure 2, the thermistor of resistance R17, R18, R19 and laser LD inside (in Fig. 1 U3 1 and 2 pins between be thermistor) form resistance bridge, it exports 2 pin and 4 pin that are connected to automatic temperature-adjusting control chip ADN8830, its value size reflects the difference of target temperature and the actual temperature (being reflected by thermistor) determined by R17 and R19, difference is larger, and temperature difference is larger.Automatic temperature-adjusting control chip ADN8830, according to this difference, through internal arithmetic, controls the voltage difference of 9 pin and 19 pin.Connect between 9 pin and 19 pin the inner integrated PAL system cooler of LD (in Fig. 1 U3 6 and 7 pins between be PAL system cooler), voltage is larger, and the electric current flowing through PAL system cooler is larger, freeze or heating effect more obvious, thus reach the object of control LD temperature.Wherein U4 and U5 is N-type metal-oxide-semiconductor and P type metal-oxide-semiconductor, plays the object of amplifying refrigeration electric current.
As shown in Figure 3,24 pin of ADN2830 chip export and export for LD bias current detects running parameter testing circuit figure, and current transformation is voltage (see figure 1) by its contact resistance R4.Be connected to R8, export after the amplifying circuit be made up of amplifies R1, R6, R8, R43 and amplifier TLV2374.6 pin of ADN2830 chip export and export for laser backlight detects diode detection, and current transformation is voltage (see figure 1) by its contact resistance R16.Be connected to R7, export after the amplifying circuit be made up of amplifies R2, R3, R7, R42 and amplifier TLV2374.31 pin of automatic temperature-adjusting control chip ADN8830 export as LD temperature detection exports (see figure 2), are connected to R37, export after the amplifying circuit be made up of amplifies R32, R34, R37 and amplifier TLV2374.Refrigeration electric current is realized by the R22 in Fig. 2, and refrigeration electric current flows through R22, and R22 two ends produce pressure drop, is connected to after the differential amplifier circuit be made up of R33, R35, R36, R38 and amplifier TLV2374 amplifies and exports.
According to the above description, the solution of the present invention can be realized in conjunction with art technology.
Claims (2)
1. miniaturized continuous light output laser drive circuit, is characterized in that, comprises automatic power control circuitry and automatic temp. controlling circuit two parts, and two parts circuit is independent separately;
Described automatic power control circuitry is made up of continuous-wave laser average power controller and ADN2830 chip, the backlight of the 4th pin connecting laser of ADN2830 chip detects diode, ADN2830 chip is according to the change in voltage of 4 pin, the electric current of 28 pin and 31 pin is regulated to export, form closed-loop control, reach the object that laser output power is stable, 23 pin, 24 pin of ADN2830 chip provide laser bias current output detections, and 26 pin of ADN2830 chip provide backlight to detect the current detecting of diode; 19 pin are that laser LD damages or aging instruction exports, and provide indicator light by metal-oxide-semiconductor Q2 and light-emitting diode V4, if this lamp is bright, then represent that laser damages;
metal-oxide-semiconductor Q1, MOS pipe Q3 and peripheral circuit thereof control the closedown of laser LD and open; 2 pin connect resistance to earth and arrange driving maximum current, prevent laser LD from damaging;
Described automatic temp. controlling circuit is made up of automatic temperature-adjusting control chip ADN8830, comprise in addition: the thermistor of resistance R17, R18, R19 and laser LD inside forms resistance bridge, it exports 2 pin and 4 pin that are connected to automatic temperature-adjusting control chip ADN8830 chip, its value size reflects the difference that namely target temperature that determined by resistance R17 and resistance R19 and actual temperature are reflected by thermistor, difference is larger, and temperature difference is larger; ADN8830 chip is according to this difference, through internal arithmetic, control the voltage difference of 9 pin and 19 pin, the PAL system cooler that between 9 pin and 19 pin, connecting laser LD is inner integrated is PAL system cooler between 6 and 7 pins of U3 and laser LD, voltage is larger, the electric current flowing through PAL system cooler is larger, refrigeration or heating effect more obvious, thus reach the object of control LD temperature, wherein U4 and U5 is N-type metal-oxide-semiconductor and P type metal-oxide-semiconductor, plays the object of amplifying refrigeration electric current;
Described running parameter testing circuit is made up of amplifier TLV2374,24 pin of ADN2830 chip export and export for laser LD bias current detects, current transformation is voltage by its contact resistance R4, be connected to resistance R8, export after the amplifying circuit be made up of amplifies resistance R1, R6, R8, R43 and amplifier TLV2374;
6 pin of ADN2830 chip export and export for laser backlight detects diode detection, current transformation is voltage by its contact resistance R16, be connected to resistance R7, by resistance R2, R3, R7, the amplifying circuit of R42 and amplifier TLV2374 composition amplifies rear output, 31 pin of ADN8830 chip export as LD temperature detection exports, be connected to resistance R37, by resistance R32, R34, the amplifying circuit of R37 and amplifier TLV2374 composition amplifies rear output, refrigeration electric current is realized by resistance R22, refrigeration current flowing resistance R22, R22 two ends produce pressure drop, be connected to by R33, R35, R36, the differential amplifier circuit of R38 and amplifier TLV2374 composition amplifies rear output.
2. miniaturized continuous light output laser drive circuit as claimed in claim 1, it is characterized in that, also comprise running parameter testing circuit, running parameter testing circuit is made up of TLV2374,24 pin of ADN2830 chip export and export for laser LD bias current detects, current transformation is voltage by its contact resistance R4, is connected to resistance R8, exports after the amplifying circuit be made up of amplifies resistance R1, R6, R8, R43 and amplifier TLV2374;
6 pin of ADN2830 chip export and export for laser backlight detects diode detection, current transformation is voltage by its contact resistance R16, be connected to resistance R7, by resistance R2, R3, R7, the amplifying circuit of R42 and amplifier TLV2374 composition amplifies rear output, 31 pin of ADN8830 chip export as LD temperature detection exports, be connected to resistance R37, by resistance R32, R34, the amplifying circuit of R37 and amplifier TLV2374 composition amplifies rear output, refrigeration electric current is realized by resistance R22, refrigeration current flowing resistance R22, R22 two ends produce pressure drop, be connected to by R33, R35, R36, the differential amplifier circuit of R38 and amplifier TLV2374 composition amplifies rear output.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410661754.1A CN104319622A (en) | 2014-11-19 | 2014-11-19 | Small driving circuit of continuous light output laser device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410661754.1A CN104319622A (en) | 2014-11-19 | 2014-11-19 | Small driving circuit of continuous light output laser device |
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| CN104319622A true CN104319622A (en) | 2015-01-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108493758A (en) * | 2018-03-27 | 2018-09-04 | 太原理工大学 | A kind of high precision temperature control and drive circuit system of laser |
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| JP2003224326A (en) * | 2002-01-30 | 2003-08-08 | Ntt Electornics Corp | Semiconductor integrated circuit for controlling laser diode, light transmission module and method for setting light output |
| US20050201431A1 (en) * | 2002-11-08 | 2005-09-15 | Hofmeister Ruldolf J. | Temperature and jitter compensation controller circuit and method for fiber optics device |
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| CN201967200U (en) * | 2010-12-29 | 2011-09-07 | 上海亨通光电科技有限公司 | Super radiation light-emitting diode driving circuit with temperature adjusting function |
| CN103208738A (en) * | 2013-04-18 | 2013-07-17 | 北京航天易联科技发展有限公司 | Semiconductor laser device driving device |
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2014
- 2014-11-19 CN CN201410661754.1A patent/CN104319622A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003224326A (en) * | 2002-01-30 | 2003-08-08 | Ntt Electornics Corp | Semiconductor integrated circuit for controlling laser diode, light transmission module and method for setting light output |
| US20050201431A1 (en) * | 2002-11-08 | 2005-09-15 | Hofmeister Ruldolf J. | Temperature and jitter compensation controller circuit and method for fiber optics device |
| CN1694321A (en) * | 2005-06-09 | 2005-11-09 | 上海大学 | Automatic power and temp. controller for pumping laser |
| CN201967200U (en) * | 2010-12-29 | 2011-09-07 | 上海亨通光电科技有限公司 | Super radiation light-emitting diode driving circuit with temperature adjusting function |
| CN103208738A (en) * | 2013-04-18 | 2013-07-17 | 北京航天易联科技发展有限公司 | Semiconductor laser device driving device |
Non-Patent Citations (2)
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| ANALOG DEVICES: "《ADN2830-specifications》", 31 December 2012 * |
| TEXAS INSTRUMENTS: "《TLV2370-DATASHEET》", 31 January 2005 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108493758A (en) * | 2018-03-27 | 2018-09-04 | 太原理工大学 | A kind of high precision temperature control and drive circuit system of laser |
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Application publication date: 20150128 |