CN107453200B - Output current regulation and control device of laser power supply - Google Patents
Output current regulation and control device of laser power supply Download PDFInfo
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- CN107453200B CN107453200B CN201710686630.2A CN201710686630A CN107453200B CN 107453200 B CN107453200 B CN 107453200B CN 201710686630 A CN201710686630 A CN 201710686630A CN 107453200 B CN107453200 B CN 107453200B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/04—Processes or apparatus for excitation, e.g. pumping, e.g. by electron beams
- H01S5/042—Electrical excitation ; Circuits therefor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/04—Processes or apparatus for excitation, e.g. pumping, e.g. by electron beams
- H01S5/042—Electrical excitation ; Circuits therefor
- H01S5/0427—Electrical excitation ; Circuits therefor for applying modulation to the laser
Abstract
The invention discloses an output current regulating and controlling device of a laser power supply, which is used for solving the technical problems that in the prior art, a mechanical potentiometer for regulating and controlling the driving current of the laser power supply needs to adopt a mode of manually setting a circuit resistor, so that errors are easily generated in manual operation, the resistance value of the mechanical potentiometer is changed after long-term use, and the driving current of the laser power supply is difficult to be accurately regulated and controlled. The embodiment of the invention comprises the following steps: the laser load circuit comprises a monostable pulse generating circuit, a driving circuit and a laser load circuit; the input end of the monostable pulse generating circuit is connected with a laser power supply and is used for generating a monostable pulse signal; the monostable pulse generating circuit comprises an active program control resistance circuit, and the active program control resistance circuit is used for regulating and controlling the width of a pulse; the input end of the driving circuit is connected with the output end of the monostable pulse generating circuit, the output end of the driving circuit is connected with the input end of the laser load circuit, and the driving circuit is used for regulating and controlling the on-off of the driving current output to the laser load circuit.
Description
Technical Field
The invention relates to the technical field of laser light sources, in particular to an output current regulating and controlling device of a laser power supply.
Background
In applying laser light source systems, it is often necessary to consider the physical characteristics of the laser light source. Since the Laser light source is a solid-state light source, its PN junction is quite fragile and damaged by a slight current surge, and thus, the Laser power supply of a semiconductor Laser (LD) has a very high requirement for a driving current, and must be a constant current source with low noise and high stability. With stable power drive, the laser pulse waveform can be stable, and an accurate pulse generation source is needed to enable the laser pulse to work stably.
In the prior art, a mechanical potentiometer is usually adopted for regulating and controlling the laser power supply driving current, namely, a mode of manually setting a circuit resistor (for example, the mechanical potentiometer is manually rotated by a screwdriver to change the circuit resistor) is easily caused with errors in manual operation, the mechanical potentiometer is easily worn in the using process, the resistance value changes after long-term use, and the precise regulation and control of the laser power supply driving current are difficult.
Disclosure of Invention
The embodiment of the invention provides an output current regulating and controlling device of a laser power supply, and solves the technical problems that in the prior art, a mechanical potentiometer for regulating and controlling the driving current of the laser power supply needs to adopt a mode of manually setting a circuit resistor, so that errors are easy to generate in manual operation, the mechanical potentiometer is easy to wear in the using process, the resistance value changes after long-term use, and the driving current of the laser power supply is difficult to accurately regulate and control.
The embodiment of the invention provides an output current regulation and control device of a laser power supply, which comprises:
the laser load circuit comprises a monostable pulse generating circuit, a driving circuit and a laser load circuit;
the input end of the monostable pulse generating circuit is connected with a laser power supply and is used for generating a monostable pulse signal;
the monostable pulse generating circuit comprises an active program control resistance circuit, and the active program control resistance circuit is used for regulating and controlling the width of a pulse;
the input end of the driving circuit is connected with the output end of the monostable pulse generating circuit, the output end of the driving circuit is connected with the input end of the laser load circuit, and the driving circuit is used for regulating and controlling the on-off of the driving current output to the laser load circuit.
Preferably, the monostable pulse generating circuit further includes: the monostable pulse output circuit is connected with the monostable pulse input circuit;
the input end of the monostable pulse input circuit is connected with the laser power supply, and the output end of the monostable pulse input circuit is connected with the input end of the active program control resistor circuit;
the input end of the monostable pulse output circuit is connected with the output end of the active program-controlled resistance circuit, and the output end of the monostable pulse output circuit is connected with the input end of the drive circuit.
Preferably, the monostable pulse input circuit and the monostable pulse output circuit each include: and a NAND gate chip.
Preferably, the active programmable resistance circuit specifically includes: a constant current source, a comparator and an RC circuit;
the constant current source is connected with the comparator and the RC circuit in sequence to form an integral circuit;
the RC circuit comprises a digital-to-analog converter which is used for receiving the program control data to change the internal duty ratio so as to change the resistance value of the integrating circuit.
Preferably, the active program-controlled resistance circuit further comprises a voltage-stabilizing filter capacitor for performing voltage-stabilizing filtering on the working voltage of the digital-to-analog converter.
Preferably, a filter capacitor is further connected between the output end of the monostable pulse generation circuit and the input end of the drive circuit, and is used for filtering the monostable pulse signal.
Preferably, a rectifier diode is further connected between the filter capacitor and the input end of the driving circuit, and is used for rectifying the filtered monostable pulse signal.
Preferably, a MOSFET driving chip is further connected between the rectifying diode and the driving circuit, and is configured to amplify the rectified monostable pulse signal and output a synchronized monostable pulse signal.
Preferably, the drive circuit is embodied as a MOSFET drive circuit.
Preferably, the laser load circuit comprises a zener diode for limiting the spike voltage.
According to the technical scheme, the embodiment of the invention has the following advantages:
by adopting the active program control resistance circuit as a resistance element for regulating and controlling the pulse width in the monostable pulse generating circuit connected with the laser power supply, the pulse can reach accurate nanosecond width according to program control and has very steep pulse rising edge and falling edge, and the adjustment and control of the resistance are carried out by the active program control resistance circuit matched with program data, the pulse width is accurately controlled in time, and the current of the laser light source is also controlled in time, compared with the adoption of a mechanical potentiometer, the technical scheme avoids the mode of manually setting the circuit resistance, avoids the error generated by manually adjusting the resistance value of the resistance, can ensure that the driving of the laser light source is more stable and accurate, and solves the problem that the mode of manually setting the circuit resistance is required by the mechanical potentiometer for regulating and controlling the driving current of the laser power supply in the prior art, the laser potentiometer has the advantages that errors are easily generated in manual operation, the mechanical potentiometer is easily abraded in the using process, resistance values change after long-term use, and the laser light source driving current is difficult to accurately regulate and control.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of an output current regulation and control device of a laser power supply according to an embodiment of the present invention.
Fig. 2 is a schematic circuit structure diagram of an output current regulating device of a laser power supply according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides an output current regulating and controlling device of a laser power supply, which is used for solving the technical problems that in the prior art, a mechanical potentiometer for regulating and controlling the driving current of the laser power supply needs to adopt a mode of manually setting a circuit resistor, so that errors are easily generated in manual operation, the mechanical potentiometer is easily abraded in the using process, the resistance value is changed after long-term use, and the driving current of the laser power supply is difficult to be accurately regulated and controlled.
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Fig. 1 is a schematic structural diagram of an output current regulating device of a laser power supply according to an embodiment of the present invention.
The embodiment of the invention provides an output current regulation and control device of a laser power supply, which comprises:
a monostable pulse generating circuit 2, a driving circuit 3 and a laser load circuit 4;
the input end of the monostable pulse generating circuit 2 is connected with a laser power supply and is used for generating a monostable pulse signal;
the monostable pulse generating circuit 2 comprises an active program-controlled resistance circuit 22, and the active program-controlled resistance circuit 22 is used for regulating and controlling the width of the pulse;
the input end of the driving circuit 3 is connected with the output end of the monostable pulse generating circuit 2, the output end of the driving circuit 3 is connected with the input end of the laser load circuit 4, and the driving circuit 3 is used for regulating and controlling the on-off of the driving current output to the laser load circuit 4.
Wherein, the power signal of the laser power is firstly input into the monostable pulse generating circuit 2, the monostable pulse generating circuit 2 generates the pulse signal required by the laser light source 1, and the monostable pulse generating circuit 2 receives program control through the active program control resistance circuit 22 (such as a full electronic active program control resistor) and automatically carries out real-time accurate adjustment on the resistance value of the resistance in the monostable pulse generating circuit 2, thereby regulating and controlling the pulse width of the generated current pulse and the current; after the current pulse signal is input to the driving circuit 3, the driving circuit 3 controls the real-time rapid on-off of the current pulse according to the actual demand to be matched and output to the laser load circuit 4, so that the laser light source 1 can obtain the driving current which can be accurately regulated and controlled and has high stability.
Further, the monostable pulse generating circuit 2 further includes: a monostable pulse input circuit 21 and a monostable pulse output circuit 23;
the input end of the monostable pulse input circuit 21 is connected with a laser power supply, and the output end of the monostable pulse input circuit 21 is connected with the input end of the active program control resistance circuit 22;
the input end of the monostable pulse output circuit 23 is connected with the output end of the active program control resistance circuit 22, and the output end of the monostable pulse output circuit 23 is connected with the input end of the drive circuit 3.
The monostable pulse input circuit 21 and the monostable pulse output circuit 23 each include: and a NAND gate chip.
Specifically, when the external trigger signal is enabled, the monostable pulse generating circuit 2 is changed from steady-state abrupt change to transient state abrupt change to steady state, a pulse is formed in the high-low level transition process through the monostable pulse input circuit 21, the width of the pulse is adjusted through the RC circuit, and the adjusted pulse width is shaped and output to the input end of the driving circuit 3 through the monostable pulse output circuit 23.
Further, the active programmable resistance circuit 22 specifically includes: a constant current source, a comparator and an RC circuit;
the constant current source is connected with the comparator and an RC circuit (Resistance-Capacitance Circuits) in sequence to form an integral circuit; the RC circuit comprises a digital-to-analog converter which is used for receiving the program control data to change the internal duty ratio so as to change the resistance value of the integrating circuit. The constant current source continuously provides a constant current for the RC circuit, the duty ratio in the digital-to-analog converter is changed after the data signal end of the digital-to-analog converter receives program control data, and therefore the resistance value of the whole integrating circuit is changed, the delay resistance value of the RC circuit is changed, the frequency of current pulses generated by the whole monostable pulse generating circuit 2 is adjusted, namely the current pulse width and the current magnitude of the current are changed, the rising edge and the falling edge of the current of the laser driving power supply are steep, rapid switching-on and switching-off are achieved, and unnecessary loss is reduced.
Further, the active programmable resistance circuit 22 further includes a voltage stabilizing filter capacitor for performing voltage stabilizing filtering on the operating voltage of the digital-to-analog converter.
Further, before the monostable pulse generating circuit 2 generates the current pulse and outputs the current pulse to the driving circuit 3, the current pulse output from the monostable pulse generating circuit 2 needs to be filtered and rectified. And a filter capacitor is connected between the output end of the monostable pulse generating circuit 2 and the input end of the drive circuit 3 and is used for filtering monostable pulse signals. And a rectifier diode is also connected between the filter capacitor and the input end of the drive circuit 3 and used for rectifying the filtered monostable pulse signal. After the current pulse is filtered by the filter capacitor and rectified by the rectifier diode, the current pulse is input to the driving circuit 3.
Further, a MOSFET driving chip is connected between the rectifying diode and the driving circuit 3, and is configured to amplify the rectified monostable pulse signal and output a synchronous monostable pulse signal. The drive circuit 3 is specifically a MOSFET drive circuit 3. In the embodiment of the invention, the MOSFET driving circuit 3 matched with the monostable pulse generating circuit 2 is used as the direct driving circuit 3, and the accurate on-off of the driving current of the laser light source 1 is realized, so that the working current of the laser light source 1 can be accurately controlled, namely the accurate regulation and control of the output current of the driving power supply of the laser light source 1 are realized.
Further, in order to protect the laser light source 1 more effectively, a zener diode may be connected in parallel to the laser light source 1 side of the laser load circuit 4, that is, the laser load circuit 4 further includes a zener diode for limiting the peak voltage and absorbing the unnecessary unfavorable energy, so as to effectively protect the laser light source 1.
For convenience of understanding, the output current regulating device of the laser power supply provided by the embodiment of the invention will be described in detail through a specific structural circuit diagram.
Fig. 2 is a schematic circuit diagram of an output current regulating device of a laser power supply according to an embodiment of the present invention.
In the embodiment of the present invention, the INPUT (signal INPUT terminal) is connected to the signal INPUT terminal PIN2 of U117 (high speed nand integrated chip) and is a signal INPUT of the monostable pulse generating circuit. The signal input terminal PIN1 of the U117 is connected with the signal input terminals PIN1 and PIN2 of the U120 (high-speed NAND integrated chip) and the signal output terminal PIN4 of the U119 (high-speed NAND integrated chip); the signal output terminal PIN4 of U117 is connected with the signal input terminals PIN1 and PIN2 of U118 (high-speed NAND integrated chip) and the signal input terminal PIN1 of U119; the supply terminals PIN5 of U117, U118, U119, U120 are connected to the supply voltage VCC; the working ground terminals PIN3 of U117, U118, U119 and U120 are connected with the system ground GND; the signal output terminal PIN4 of the U118 is respectively connected with one end of the R1, the inverting input terminal PIN2 of the U126A (comparator) and one end of the SY1 (constant current source); one ends of a non-inverting input terminal PIN3, a working ground PIN8 and a SY1 of the U126A are connected with the system ground; an output terminal PIN1 of the U126A is respectively connected with one end of the R1 and a reference voltage terminal PIN6 of the U125; PIN1, PIN2 and PIN3 of U125 are respectively connected with one ends of R15, R13 and R14, and the other ends of R14, R13 and R15 are connected with a power supply voltage VCC; the signal output end PIN4 of the U125 is respectively connected with the input end PIN2 of the U119 and one end of the capacitor C4; the PIN8 of the U125 is respectively connected with the C2, the C3, the R13, the R14, the R15 and the supply voltage VCC; the PIN5 of U125 is connected to system ground. The signal input terminal PIN1 of U119 is connected with the signal input terminals PIN1 and PIN2 of U118 respectively; the signal input end PIN2 of the U119 is respectively connected with the output end PIN4 of the U125 and one end of the capacitor C4; the working ground PIN3 of the U119 is connected with the other end of the capacitor C4 and then connected with the system ground; the output PIN4 of U119 is connected to the signal inputs PIN1, PIN2 of U120 and PIN1 of U117, respectively; the PIN5 of the U119 is connected to the PIN5 of the U117, the PIN5 of the U118, the PIN4 of the U126A and the PIN5 of the U120, respectively, and then connected to the supply voltage VCC. The signal input ends PIN1 and PIN2 of the U120 are respectively connected with the signal output ends PIN4 and PIN1 of the U119 after short circuit; the operational ground of U120 is connected to system ground; a signal output terminal PIN4 of the U120 is respectively connected with one end of each of the capacitors C5 and C6; the PIN5 of the U120 is connected to the PIN5 of the U117, the PIN5 of the U118, the PIN4 of the U126A and the PIN5 of the U119, respectively, and then connected to the supply voltage VCC. The operating ground PIN3 of U120 is connected to the other end of capacitor C4 and then to system ground.
Wherein, INPUT, U117, U118 constitute monostable pulse INPUT circuit, SY1, R1, U126A, U125, R14, R13, R15, C2, C3, C4 constitute active program control resistance circuit, U119, U120 constitute monostable pulse output circuit. The U117, U118, U126A, U125, SY1, C4, U119 and U120 jointly form a monostable pulse generating circuit and generate a current pulse signal required by a laser light source. The SY1 is a constant current source and continuously supplies a constant current to the R1, after the data signal end of the U125 receives program control data, the duty ratio inside the U125 is changed, so that the resistance value in the integrating circuit is changed, the RC delay loop is changed, the frequency of current pulse is adjusted, the current pulse width and the current magnitude of a driving power supply of the laser light source are changed, the rising edge and the falling edge of the current of the laser driving power supply are steep, the rapid switching-on and switching-off are realized, and unnecessary loss is reduced. C2 and C3 are voltage-stabilizing filter capacitors of the U125 working voltage, and C4 is a key element in the integrating circuit and forms a time-delay controllable RC circuit with the active program-controlled resistor circuit.
An enabling PIN1 of a U121(MOSFET driving chip) is connected to one end of R5 after being shorted with a PIN5, and the other end of R5 is connected to a system supply voltage VCC; an input signal terminal PIN3 of the U121 is respectively connected with cathodes of a rectifier diode D82 and a rectifier diode D83, and an output terminal PIN4 of the U121 is respectively connected with gate terminals of a MOS73(MOSFET tube) and a MOS74(MOSFET tube); ground PIN2 of U121 is connected to the anode of diode D83 and then to system ground. The anode of the diode D82 is connected to one end of the filter capacitor C5 and one end of the filter capacitor C6, respectively, and the other end of the filter capacitor C5 and the other end of the filter capacitor C6 are connected to the output PIN4 of the U120 after being short-circuited. The diode D83 has its anode connected to ground and its cathode connected to the cathode of D82 and the input PIN3 of U121. The high-voltage HV is respectively connected with one ends of a capacitor C8, a capacitor C7 and a resistor R2, the other ends of the C7 and the C8 are grounded, the other end of the R2 is respectively connected with one ends of a drain PIN5, a drain PIN6, a drain PIN7, a drain PIN8 and a drain of a MOS74 of a MOS73, the capacitor C10 and a capacitor C9, and the other end of the C9 is respectively connected with an anode of a diode D84 and one end of a resistor R4; the other end of the C10 is connected with a resistor R3; the other end of R3 is grounded; the source of MOS73 PIN1, PIN2 and PIN3 are shorted with the source of MOS74 and then connected to the system ground; the gate PIN4 of the MOS73 is connected with the output terminal PIN4 of the U121 after being shorted with the gate PIN4 of the MOS 74; the cathode of the diode D84 is connected with the anode of the D85, the cathode of the D85 is connected with the system ground, and the other end of the R4 is respectively connected with the cathode of the laser light source LD and the anode of the voltage stabilizing diode D86; the cathode of D85, the cathode of D86 and the anode of LD are respectively connected with the system ground.
The monostable pulse signal is sent to a signal input end PIN3 of the U121 after being filtered by C5 and C6 and rectified by D82 and D83, the signal is amplified by the U121 and then outputs a synchronous pulse signal which is added to gates of MOS73 and MOS74 to drive the MOS73 and MOS74 to be switched on and off. When MOS73, MOS74 cut off, HV high voltage end charges capacitor C9 through R2, the current flows back to HV negative terminal ground through R2, C9, LD at this moment, after MOS73, MOS74 turn on, C9 discharges through MOS73, MOS74, the current of laser source passes through C9, MOS73, MOS74 drain-source electrode to HV negative terminal ground, and the accurate control of MOS73, MOS74 break-make, make LD operating current obtain accurate control, have realized the characteristic of following the laser source, have guaranteed the long life of laser source. The D86 well limits the peak voltage generated in the discharge process of the C9, absorbs the redundant unfavorable energy and effectively protects the laser light source.
In the embodiment of the invention, an active program control resistance circuit is adopted in a monostable pulse generating circuit connected with a laser power supply as a resistance element for regulating and controlling the pulse width, so that the pulse can reach accurate nanosecond width according to program control, the pulse has very steep pulse rising edge and falling edge, the resistance is regulated and controlled by the active program control resistance circuit matched with program data, the pulse width is accurately controlled in time, the current of the laser light source is also controlled in time, in addition, an MOSFET driving circuit matched with the monostable pulse generating circuit is also adopted as a direct driving circuit, the accurate on-off of the driving current of the laser light source is realized, the working current of the laser light source can be accurately controlled, namely, a mechanical potentiometer is adopted for realizing the accurate regulation and control of the output current of the laser light source driving power supply, this technical scheme has evaded the mode of manual setting circuit resistance, the error of having avoided manual operation adjustment resistance value to produce, can make laser light source's drive more stable and accurate, the mechanical type potentiometre that has solved among the prior art to carrying out regulation and control to laser power supply drive current need adopt the mode of manual setting circuit resistance, produce the error in manual operation easily, and mechanical type potentiometre produces wearing and tearing easily in the use, the resistance produces the change after long-term the use, be difficult to carry out the technical problem of accurate regulation and control to laser light source drive current.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. An output current regulation and control device of a laser power supply, comprising:
the laser load circuit comprises a monostable pulse generating circuit, a driving circuit and a laser load circuit;
the input end of the monostable pulse generating circuit is connected with a laser power supply and is used for generating a monostable pulse signal;
the monostable pulse generating circuit comprises an active program-controlled resistance circuit, and the active program-controlled resistance circuit is used for regulating and controlling the width of a pulse;
the input end of the driving circuit is connected with the output end of the monostable pulse generating circuit, the output end of the driving circuit is connected with the input end of the laser load circuit, and the driving circuit is used for regulating and controlling the on-off of the driving current output to the laser load circuit;
the monostable pulse generating circuit receives program control through the active program control resistance circuit and automatically and accurately adjusts the resistance value of the resistor in the monostable pulse generating circuit in real time, so that the pulse width of the generated current pulse and the current size are regulated and controlled;
the active program control resistance circuit specifically comprises: a constant current source, a comparator and an RC circuit;
the constant current source is sequentially connected with the comparator and the RC circuit to form an integral circuit;
the RC circuit comprises a digital-to-analog converter, and the digital-to-analog converter is used for receiving program control data to change the internal duty ratio so as to change the resistance value of the integrating circuit;
the active program control resistance circuit further comprises a voltage stabilizing and filtering capacitor which is used for performing voltage stabilizing and filtering on the working voltage of the digital-to-analog converter.
2. The output current regulator of claim 1, wherein the monostable pulse generating circuit further comprises: the monostable pulse output circuit is connected with the monostable pulse input circuit;
the input end of the monostable pulse input circuit is connected with the laser power supply, and the output end of the monostable pulse input circuit is connected with the input end of the active program control resistor circuit;
the input end of the monostable pulse output circuit is connected with the output end of the active program-controlled resistance circuit, and the output end of the monostable pulse output circuit is connected with the input end of the driving circuit.
3. The output current regulator of claim 2, wherein the monostable pulse input circuit and the monostable pulse output circuit each comprise: and a NAND gate chip.
4. The output current regulation device of claim 1, wherein a filter capacitor is further connected between the output end of the monostable pulse generation circuit and the input end of the driving circuit, and is configured to filter a monostable pulse signal.
5. The output current regulation device of claim 4, wherein a rectifier diode is further connected between the filter capacitor and the input end of the driving circuit, and is used for rectifying the filtered monostable pulse signal.
6. The output current regulation device of claim 5, wherein a MOSFET driver chip is further connected between the rectifier diode and the driver circuit for amplifying the rectified monostable pulse signal and outputting a synchronized monostable pulse signal.
7. The output current regulation device of claim 1, wherein the driving circuit is a MOSFET driving circuit.
8. The output current regulator of claim 1, wherein the laser load circuit comprises a zener diode for limiting the peak voltage.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2831538Y (en) * | 2005-01-21 | 2006-10-25 | 南昌航空工业学院 | Digital semiconductor laser driving power source |
| CN101895058A (en) * | 2010-07-07 | 2010-11-24 | 中国科学院上海光学精密机械研究所 | High-speed narrow pulse modulation driving power supply for semiconductor laser |
| CN103326236A (en) * | 2013-06-19 | 2013-09-25 | 华中科技大学 | Semiconductor laser unit modulating and driving system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2016511553A (en) * | 2013-03-15 | 2016-04-14 | レイセオン カンパニー | Diode drivers for battery operated laser systems |
| US9793683B2 (en) * | 2015-08-21 | 2017-10-17 | Vuemetrix, Inc. | Digital pulse width modulation power supply with pico second resolution |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2831538Y (en) * | 2005-01-21 | 2006-10-25 | 南昌航空工业学院 | Digital semiconductor laser driving power source |
| CN101895058A (en) * | 2010-07-07 | 2010-11-24 | 中国科学院上海光学精密机械研究所 | High-speed narrow pulse modulation driving power supply for semiconductor laser |
| CN103326236A (en) * | 2013-06-19 | 2013-09-25 | 华中科技大学 | Semiconductor laser unit modulating and driving system |
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