CN116345299A - Multi-wavelength light source driving control circuit - Google Patents
Multi-wavelength light source driving control circuit Download PDFInfo
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- CN116345299A CN116345299A CN202310132932.0A CN202310132932A CN116345299A CN 116345299 A CN116345299 A CN 116345299A CN 202310132932 A CN202310132932 A CN 202310132932A CN 116345299 A CN116345299 A CN 116345299A
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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
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- H01S5/0428—Electrical excitation ; Circuits therefor for applying pulses to the laser
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Abstract
The invention provides a drive control circuit of a multi-wavelength light source, which comprises a rectangular pulse module, a trigger source module, a constant current source and a pulse width control module, wherein the rectangular pulse module taking an avalanche diode as a core generates rectangular pulse signals to drive light sources with different wavelengths to work, and the pulse width control module controls the pulse width generated by the rectangular pulse module, so that the generated pulse width can meet the threshold value of laser emitted by different laser diodes, can be suitable for drive control of light sources with various wavelengths, realizes the drive of the laser diodes with various different wavelengths by one drive circuit, and has the advantages of good output waveform, high stability, low manufacturing cost, strong universality and convenience in popularization and application.
Description
Technical Field
The invention relates to the technical field of light source driving, in particular to a multi-wavelength light source driving control circuit.
Background
The laser light source is usually composed of single or multiple wave band laser analog emitting devices, the emitting devices are usually composed of semiconductor laser diodes excited by lower voltage and corresponding driving circuits, and different light emitting sources need driving power supplies with different characteristics to drive to obtain continuous current so that the corresponding light emitting sources emit light. For the LED light source, a constant current driving mode with low voltage and large current is required, and the laser light source is similar to the LED light emitting semiconductor light source, but according to the use characteristics, a high voltage and small current scheme is often adopted for the constant current driving of the laser light source, and in general, the current driving of the laser light source requires high voltage and small current.
In the prior art, the driving of light sources with different wavelengths requires pulse driving signals with different pulse widths, and since laser emitting devices with different functions have different wavelengths and rated powers, the proposed driving requirements are different, the conventional light source driving circuit has poor universality, and only can generate a pulse signal with a certain fixed pulse width, so that a certain light source driving circuit can only drive a light source with a specific wavelength, and therefore, it is necessary to design a driving circuit capable of being commonly used for laser diodes with different wavelengths.
Disclosure of Invention
The present invention is directed to a multi-wavelength light source driving control circuit, which solves the above-mentioned problems.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a multi-wavelength light source drive control circuit, comprising:
the rectangular pulse module comprises an avalanche transistor and an energy storage capacitor, and the avalanche transistor is electrically connected with the energy storage capacitor and used for controlling the energy storage capacitor to discharge to form voltage pulses;
the trigger source module is electrically connected with the rectangular pulse module and is used for sending out trigger pulses to control the on and off of the avalanche transistor;
the constant current source is electrically connected with the avalanche transistor and the energy storage capacitor and is used for controlling the avalanche transistor to be cut off and charging the energy storage capacitor when the trigger source module does not send a trigger pulse;
the pulse width control module is electrically connected with the rectangular pulse module and is used for controlling the conduction time of the avalanche transistor so that the rectangular pulse module forms a pulse width meeting the requirement.
In one embodiment, the trigger source module includes a trigger source and a trigger pulse shaping circuit, where the trigger source is configured to generate a periodic trigger signal, and the trigger signal generated by the trigger source is shaped by the trigger pulse shaping circuit and then output to the trigger end of the rectangular pulse module.
In one embodiment, the pulse width control module is connected in series on a circuit between the trigger source and the trigger pulse shaping circuit, and comprises an input level conversion circuit, a delay circuit and a pulse width adjustment circuit which are sequentially connected, wherein the delay circuit is also connected with the singlechip, the output of the singlechip is also connected with the pulse width adjustment circuit, a trigger signal input by the trigger source is converted into a logic level through the input level conversion circuit and then enters the delay circuit to carry out delay, the pulse width adjustment circuit is used for forming a certain pulse width, and the singlechip is used for controlling the delay circuit and the pulse width adjustment circuit.
In one embodiment, the constant current source includes a power supply module, a DC-DC module and a current limiting module, where the power supply module is electrically connected with an input end of the DC-DC module and is used for providing a power supply for the DC-DC module, the DC-DC module is used for boosting a voltage of the power supply module, one end of the current limiting module is electrically connected with an output end of the DC-DC module, and the other end of the current limiting module is electrically connected with the rectangular pulse module and is used for adjusting a current input into the rectangular pulse module.
In one embodiment, the rectangular pulse module includes an inductor L1, a resistor R2, a resistor R3, a capacitor C3, a resistor R4, an avalanche transistor Q1 and a pulse transformer T1 which are sequentially connected in series, wherein the other end of the inductor L1 is electrically connected with a power supply end of the constant current source, the other end of the resistor R4 is a negative pulse output end, a collector of the avalanche transistor Q1 is electrically connected with a connection position of the resistor R3 and the capacitor C3, a base and an emitter are respectively electrically connected with a secondary winding of the pulse transformer T1, the secondary winding is connected with the ground in series through a resistor R6 and is used as a positive pulse output end, and a primary winding of the pulse transformer T1 is respectively connected with a trigger pulse signal end of the rectangular pulse module through a series capacitor C1 and is grounded in series with the resistor R1.
In one embodiment, the connection between the resistor R2 and the resistor R3 is grounded through a capacitor C2, the emitter of the avalanche transistor Q1 is connected in series with a capacitor C4 and a resistor R5, the other end of the resistor R5 is used as a positive pulse output end, a resistor R7 and a resistor R8 are connected in series between the negative pulse output end and the positive pulse output end, and the connection between the resistor R7 and the resistor R8 is grounded.
In one embodiment, the output end of the rectangular pulse module is further electrically connected with a matching and peak clipping circuit, the matching and peak clipping circuit comprises a transistor Q2, a transistor Q3, a diode D1, a diode D2, a diode D3 and a diode D4, the P-pole of the diode D1 is connected with one end of a resistor R9, the N-pole of the diode D1 is connected with the base of the transistor Q2, the P-pole of the diode D2 is connected with one end of a resistor R10, the N-pole of the diode D2 is connected with the base of the transistor Q2, the N-pole of the diode D3 is connected with the P-pole of the diode D2, the P-pole is connected with the base of the transistor Q3, the N-pole of the diode D4 is connected with the P-pole of the diode D1, the P-pole is connected with the base of the transistor Q3, the other end of the resistor R9 is the input end, the N-pole of the diode D1 is electrically connected with the output end of the rectangular pulse module, the base of the transistor Q2 is connected with the resistor R3 via the base of the resistor R11, the transistor Q3 is connected with the output end of the transistor Q12 in series with the transistor Q3, and the transistor Q13 is connected with the output end of the transistor Q3.
Compared with the prior art, the invention has the beneficial effects that:
the invention uses the rectangular pulse module with avalanche diode as core to generate rectangular pulse signal to drive the light source with different wavelength to work, and uses the pulse width control module to control the pulse width generated by the rectangular pulse module, so that the generated pulse width can meet the threshold value of the laser emitted by different laser diodes, and the invention can be suitable for driving and controlling the light source with various wavelengths, and realizes the driving of the laser diodes with various different wavelengths by one driving circuit.
Drawings
FIG. 1 is a schematic diagram of the overall system architecture of the present invention;
FIG. 2 is a schematic diagram of a circuit structure of a rectangular pulse module according to the present invention;
fig. 3 is a schematic circuit diagram of a matching and peak clipping circuit according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples:
referring to fig. 1 to 3, the present invention provides a technical solution:
a drive control circuit for a multi-wavelength light source comprises a rectangular pulse module, a trigger source module, a constant current source and a pulse width control module, wherein:
the trigger source module is electrically connected with the rectangular pulse module and is used for sending trigger pulses to control the on and off of the avalanche transistor.
Further, the trigger source module includes a trigger source and a trigger pulse shaping circuit, the trigger source is configured to generate a periodic trigger signal, the trigger signal generated by the trigger source is shaped by the trigger pulse shaping circuit and then output to the trigger end of the rectangular pulse module, and the trigger pulse shaping circuit can regulate the output level of the trigger source, which can be set according to the conventional manner of the common circuit, and this is a conventional structure in various circuits, which is not described in detail herein.
The trigger source generates a periodic trigger signal, which may be a periodic sinusoidal signal, a square wave signal, a triangular wave signal, or the like, and the signal may be generated by a DDS chip, a signal source chip, a crystal oscillator, or a VCO, or the like, frequency source.
Optionally, the amplitude of the signal generated by the trigger source module may not be enough to drive the rectangular pulse module, and an amplifying circuit may be selected to amplify the amplitude of the driving signal to the trigger threshold of the rectangular pulse module, so that the trigger signal reaches a sufficient amplitude.
The constant current source is electrically connected with the avalanche transistor and the energy storage capacitor, and is used for controlling the avalanche transistor to cut off and charging the energy storage capacitor when the trigger source module does not send trigger pulse.
Further, the constant current source comprises a power supply module, a DC-DC module and a current limiting module, wherein the power supply module is electrically connected with the input end of the DC-DC module and used for providing power for the DC-DC module, the DC-DC module is used for boosting the voltage of the power supply module, one end of the current limiting module is electrically connected with the output end of the DC-DC module, and the other end of the current limiting module is electrically connected with the rectangular pulse module and used for adjusting the current input into the rectangular pulse module.
Optionally, the current limiting module may use a current limiting resistor or a current limiting diode, and the power supply module uses a dc power supply module.
The rectangular pulse module comprises an avalanche transistor and an energy storage capacitor, wherein the avalanche transistor is electrically connected with the energy storage capacitor and is used for controlling the energy storage capacitor to discharge to form voltage pulses, when the trigger source module is not started, the input end of the circuit presents high resistance, the constant current source charges the energy storage capacitor, the collector junction of the avalanche transistor is in a reverse bias state, the avalanche transistor reaches a stable state and is basically in a cut-off state, when the trigger pulse of the trigger source module arrives, the current flowing out of a base electrode is reduced and gradually converted into the current flowing into the base electrode, the avalanche transistor breaks down, the energy storage capacitor rapidly discharges, a very large current can flow briefly to form a voltage pulse, after the discharge of the energy storage capacitor is finished, the trigger pulse of the trigger source module disappears, the avalanche transistor enters the cut-off state again and charges the energy storage capacitor again, when the next pulse of the trigger source module arrives, the process is repeated again, the process is repeated and the avalanche transistor is circularly reciprocated, and the model number adopted by the avalanche transistor is 2N2222.
Further, the rectangular pulse module comprises an inductor L1, a resistor R2, a resistor R3, a capacitor C3, a resistor R4, an avalanche transistor Q1 and a pulse transformer T1 which are sequentially connected in series, wherein the other end of the inductor L1 is electrically connected with a power end of a constant current source, the other end of the resistor R4 is a negative pulse output end, a collector of the avalanche transistor Q1 is electrically connected with a connection part of the resistor R3 and the capacitor C3, a base and an emitter are respectively electrically connected with a secondary side winding of the pulse transformer T1, the base and the emitter are respectively connected with the secondary side winding of the pulse transformer T1 in series and are grounded through the resistor R6 and serve as positive pulse output ends, and a primary side winding of the pulse transformer T1 is respectively connected with a trigger pulse signal end of the rectangular pulse module through the series capacitor C1 and the series resistor R1 is grounded.
Further, the connection part of the resistor R2 and the resistor R3 is grounded through a capacitor C2, a capacitor C4 and a resistor R5 are connected in series with the transmitting stage of the avalanche triode Q1, the other end of the resistor R5 is used as a positive pulse output end, a resistor R7 and a resistor R8 are connected in series between the negative pulse output end and the positive pulse output end, and the connection part of the resistor R7 and the resistor R8 is grounded.
Wherein R2 and R3 are current limiting resistors, C2 plays a role of filtering, C3 is an energy storage capacitor, R7 and R8 are load resistors, a constant current source charges the energy storage capacitor C3 through an inductor L1, the resistors R2 and R3, a circuit is in a critical avalanche state, the trigger source module capacitor C1 and the pulse transformer T1 trigger the avalanche transistor Q1 to conduct, and charges stored on the C3 are rapidly discharged through the avalanche transistor Q1, the coupling capacitor C4 and the resistors R4, R5, R7 and R8, and positive and negative symmetrical nanosecond pulse signals are generated at an output end.
Alternatively, the rectangular pulse module may also form a rectangular pulse circuit based on the quench diode and the tunnel diode.
The pulse width control module is electrically connected with the rectangular pulse module and is used for controlling and controlling the conduction time of the avalanche transistor so that the rectangular pulse module forms a pulse width meeting the requirement.
Further, the pulse width control module is connected in series on a circuit between the trigger source and the trigger pulse shaping circuit and comprises an input level conversion circuit, a delay circuit and a pulse width adjustment circuit which are sequentially connected, wherein the delay circuit is also connected with the singlechip, the output of the singlechip is also connected with the pulse width adjustment circuit, a trigger signal input by the trigger source is converted into a logic level through the input level conversion circuit and then enters the delay circuit to carry out time delay, the pulse width adjustment circuit is used for forming a certain pulse width, the singlechip is used for controlling the delay circuit and is connected with the pulse width adjustment circuit, and the trigger pulse shaping circuit can regulate the output level of the pulse width adjustment circuit.
The delay circuit is composed of DS1021-25 type programmable delay devices, the delay amount is determined by the data written into the programmable delay devices by the singlechip, and the change of the delay amount is realized by changing the data written into the programmable delay devices.
Optionally, the delay circuit and the pulse width adjusting circuit can use three programmable delays and logic gates in a matched manner, a singlechip is utilized to configure a two-stage delay line chain, a first stage formed by the first programmable delay is overall delay, an output delay signal is divided into two paths of delays, one path of delay signal is subjected to non-operation through an inverter, the delay time of the second stage two delays is adjusted, and the obtained pulse width can be accurately adjusted.
Further, the output end of the rectangular pulse module is further electrically connected with a matching and peak clipping circuit, the matching and peak clipping circuit comprises a transistor Q2, a transistor Q3, a diode D1, a diode D2, a diode D3 and a diode D4, the P pole of the diode D1 is connected with one end of a resistor R9, the N pole of the diode D1 is connected with the base of the transistor Q2, the P pole of the diode D2 is connected with one end of a resistor R10, the N pole of the diode D2 is connected with the base of the transistor Q2, the N pole of the diode D3 is connected with the P pole of the diode D2, the P pole is connected with the base of the transistor Q3, the N pole of the diode D4 is connected with the P pole of the diode D1, the P pole is connected with the base of the transistor Q3, the other end of the resistor R9 is the input end, the N pole of the diode D1 is electrically connected with the output end of the rectangular pulse module, the base of the transistor Q2 is connected with the base of the resistor R11, the transistor Q3 is connected with the transistor Q3 in series connection with the transistor Q3 through the resistor R11, and the voltage of the transistor Q3 is prevented from being influenced by the transistor Q3 and the voltage is stable, and the transistor Q13 is prevented from being connected with the output end of the transistor Q3.
The application principle of the invention is as follows:
the trigger source sends out periodic trigger signals, the periodic trigger signals are output to the pulse width control module, the trigger signals input by the trigger source are converted into logic levels through a level conversion circuit in the pulse width control module and then enter a delay circuit for delay, the pulse width adjustment circuit is used for forming a certain pulse width, the pulse width can be adjusted according to requirements, the pulse width also determines the pulse width of pulses output by the rectangular pulse module, and therefore the purpose of adjusting the pulse width of pulses output by the rectangular pulse module is achieved, the generated pulse width can meet the threshold value of laser emitted by different laser diodes, and the drive control of light sources with various wavelengths can be applicable;
the rectangular pulse module comprises an avalanche transistor and an energy storage capacitor, the avalanche transistor is electrically connected with the energy storage capacitor and is used for controlling the energy storage capacitor to discharge to form voltage pulses, when the trigger source module is not started, the input end of the circuit presents high resistance, the energy storage capacitor is charged by the constant current source, the collector junction of the avalanche transistor is in a reverse bias state, the avalanche transistor reaches a stable state and is basically in a cut-off state;
when the trigger pulse of the trigger source module arrives, the current flowing out of the base electrode is reduced and gradually converted into the current flowing into the base electrode, the avalanche transistor breaks down, the energy storage capacitor discharges rapidly, and a very large current flows transiently, so that a voltage pulse is formed;
after the energy storage capacitor discharges, the trigger source module trigger pulse disappears, the avalanche transistor enters a cut-off state again, the constant current source charges the energy storage capacitor again, and when the next pulse of the trigger source module arrives, the process is repeated again, and the process is repeated circularly to form a series of voltage pulses;
the matching and peak clipping circuit is electrically connected with the output end of the rectangular pulse module, and can provide stable voltage to prevent the influence on the using effect due to unstable voltage.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A multi-wavelength light source drive control circuit, comprising:
the rectangular pulse module comprises an avalanche transistor and an energy storage capacitor, and the avalanche transistor is electrically connected with the energy storage capacitor and used for controlling the energy storage capacitor to discharge to form voltage pulses;
the trigger source module is electrically connected with the rectangular pulse module and is used for sending out trigger pulses to control the on and off of the avalanche transistor;
the constant current source is electrically connected with the avalanche transistor and the energy storage capacitor and is used for controlling the avalanche transistor to be cut off and charging the energy storage capacitor when the trigger source module does not send a trigger pulse;
the pulse width control module is electrically connected with the rectangular pulse module and is used for controlling the conduction time of the avalanche transistor so that the rectangular pulse module forms a pulse width meeting the requirement.
2. The multi-wavelength light source driving control circuit according to claim 1, wherein: the trigger source module comprises a trigger source and a trigger pulse shaping circuit, wherein the trigger source is used for generating a periodic trigger signal, and the trigger signal generated by the trigger source is shaped by the trigger pulse shaping circuit and then is output to the trigger end of the rectangular pulse module.
3. The multi-wavelength light source driving control circuit according to claim 2, wherein: the pulse width control module is connected in series on a circuit between the trigger source and the trigger pulse shaping circuit and comprises an input level conversion circuit, a delay circuit and a pulse width adjustment circuit which are sequentially connected, wherein the delay circuit is also connected with the singlechip, the output of the singlechip is also connected with the pulse width adjustment circuit, a trigger signal input by the trigger source is converted into a logic level through the input level conversion circuit and then enters the delay circuit to carry out delay, the pulse width adjustment circuit is used for forming a certain pulse width, and the singlechip is used for controlling the delay circuit and the pulse width adjustment circuit.
4. The multi-wavelength light source driving control circuit according to claim 1, wherein: the constant current source comprises a power supply module, a DC-DC module and a current limiting module, wherein the power supply module is electrically connected with the input end of the DC-DC module and used for providing power for the DC-DC module, the DC-DC module is used for boosting the voltage of the power supply module, one end of the current limiting module is electrically connected with the output end of the DC-DC module, and the other end of the current limiting module is electrically connected with the rectangular pulse module and used for adjusting the current input into the rectangular pulse module.
5. The multi-wavelength light source driving control circuit according to claim 1, wherein: the rectangular pulse module comprises an inductor L1, a resistor R2, a resistor R3, a capacitor C3, a resistor R4, an avalanche transistor Q1 and a pulse transformer T1 which are sequentially connected in series, wherein the other end of the inductor L1 is electrically connected with a power end of a constant current source, the other end of the resistor R4 is a negative pulse output end, a collector of the avalanche transistor Q1 is electrically connected with a junction of the resistor R3 and the capacitor C3, a base and an emitter are respectively electrically connected with a secondary side winding of the pulse transformer T1, the base and the emitter are connected with the ground in series through a resistor R6 and serve as a positive pulse output end, and a primary side winding of the pulse transformer T1 is respectively connected with a trigger pulse signal end of the rectangular pulse module through a series capacitor C1 and the series resistor R1 is grounded.
6. The multi-wavelength light source driving control circuit according to claim 5, wherein: the junction of resistance R2, resistance R3 is grounded through electric capacity C2, avalanche triode Q1's emitter is established ties and is had electric capacity C4 and resistance R5, and resistance R5's the other end is as positive pulse output, establish ties between negative pulse output and the positive pulse output and be had resistance R7 and resistance R8, resistance R7 and resistance R8's junction ground connection.
7. The multi-wavelength light source driving control circuit according to claim 1, wherein: the output end of the rectangular pulse module is further electrically connected with a matching and peak clipping circuit, the matching and peak clipping circuit comprises a transistor Q2, a transistor Q3, a diode D1, a diode D2, a diode D3 and a diode D4, the P pole of the diode D1 is connected with one end of a resistor R9, the N pole of the diode D1 is connected with the base electrode of the transistor Q2, the P pole of the diode D2 is connected with one end of a resistor R10, the N pole of the diode D2 is connected with the base electrode of the transistor Q2, the N pole of the diode D3 is connected with the P pole of the diode D2, the P pole is connected with the base electrode of the transistor Q3, the N pole of the diode D4 is connected with the P pole of the diode D1, the P pole is connected with the base electrode of the transistor Q3, the other end of the resistor R9 is an input end, the N pole of the diode D1 is electrically connected with the output end of the rectangular pulse module, the base electrode of the transistor Q2 is connected with the output end of the transistor Q3 through the resistor R11, the N pole of the transistor D3 is connected with the output end of the transistor Q3, and the transistor Q12 is connected with the output end of the transistor Q12 in series.
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| CN202310132932.0A CN116345299B (en) | 2023-02-20 | 2023-02-20 | Multi-wavelength light source driving control circuit |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01117382A (en) * | 1987-10-30 | 1989-05-10 | Koden Electron Co Ltd | Laser pulse generating device |
| CN102354907A (en) * | 2011-09-21 | 2012-02-15 | 中国人民解放军总装备部军械技术研究所 | Multi-wavelength integrated infrared semiconductor laser light source |
| CN102595721A (en) * | 2012-02-03 | 2012-07-18 | 中国人民解放军总装备部军械技术研究所 | High-precision intelligent integrated driving power supply for semiconductor light-emitting device |
| CN105049000A (en) * | 2015-08-24 | 2015-11-11 | 桂林电子科技大学 | Optional-pulse-width narrow pulse generator |
| CN206041199U (en) * | 2016-09-13 | 2017-03-22 | 武汉万集信息技术有限公司 | High peak power semiconductor laser drive circuit of small -size narrow pulse width |
-
2023
- 2023-02-20 CN CN202310132932.0A patent/CN116345299B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01117382A (en) * | 1987-10-30 | 1989-05-10 | Koden Electron Co Ltd | Laser pulse generating device |
| CN102354907A (en) * | 2011-09-21 | 2012-02-15 | 中国人民解放军总装备部军械技术研究所 | Multi-wavelength integrated infrared semiconductor laser light source |
| CN102595721A (en) * | 2012-02-03 | 2012-07-18 | 中国人民解放军总装备部军械技术研究所 | High-precision intelligent integrated driving power supply for semiconductor light-emitting device |
| CN105049000A (en) * | 2015-08-24 | 2015-11-11 | 桂林电子科技大学 | Optional-pulse-width narrow pulse generator |
| CN206041199U (en) * | 2016-09-13 | 2017-03-22 | 武汉万集信息技术有限公司 | High peak power semiconductor laser drive circuit of small -size narrow pulse width |
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