CN116544766B - Control circuit and method of pump laser and erbium-doped fiber amplifier - Google Patents
Control circuit and method of pump laser and erbium-doped fiber amplifier Download PDFInfo
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- CN116544766B CN116544766B CN202310610535.XA CN202310610535A CN116544766B CN 116544766 B CN116544766 B CN 116544766B CN 202310610535 A CN202310610535 A CN 202310610535A CN 116544766 B CN116544766 B CN 116544766B
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000000835 fiber Substances 0.000 title claims abstract description 14
- 238000005086 pumping Methods 0.000 claims abstract description 15
- 239000003990 capacitor Substances 0.000 claims description 31
- 239000013078 crystal Substances 0.000 claims description 6
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 6
- 239000013307 optical fiber Substances 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 238000004146 energy storage Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
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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
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/10007—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers
- H01S3/1001—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers by controlling the optical pumping
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
- G05F1/561—Voltage to current converters
-
- 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
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06754—Fibre amplifiers
-
- 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
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/10007—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers
- H01S3/10015—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers by monitoring or controlling, e.g. attenuating, the input signal
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The invention discloses a control circuit and method of a pump laser and a erbium-doped fiber amplifier, and relates to the technical field of fiber amplifiers. The control circuit of the pump laser comprises a signal analysis module, a constant current driving module, a main control module and a power supply module, wherein the signal analysis module is used for analyzing a pulse signal to obtain frequency information and amplitude information of the pulse signal and converting the amplitude information of the pulse signal into a corresponding constant voltage signal; the constant current driving module is used for controlling the on and off of the pumping laser according to the frequency information of the pulse signals and realizing constant current driving of the pumping laser according to the constant voltage signals; the main control module is electrically connected with the constant current driving module; the power module is used for providing working power for the signal analysis module, the constant current driving module and the main control module. According to the control circuit of the pump laser, the light emitting time of the pump laser can be controlled, so that the electric energy consumption of the erbium-doped fiber amplifier is effectively reduced.
Description
Technical Field
The invention relates to the technical field of optical fiber amplifiers, in particular to a control circuit and method of a pump laser and a erbium-doped optical fiber amplifier.
Background
At present, the erbium-doped fiber amplifier (EDFA) basically uses continuous signals to control the pump laser (pump) to output, and the output light of the pump laser is continuous laser, but in the use process, an acousto-optic modulator (AOM) is adopted, the output light of the pump is changed into pulse laser by a switch mode, only the laser after the AOM is turned on is used, and the laser after the AOM is turned off is wasted, and the power supply is consumed all the time, so that the power consumption of the EDFA is larger. For some mobile devices using a battery, it is important to save energy of the battery, and if the existing manner of controlling pump is adopted, the energy saving requirement of the battery cannot be met.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides a control circuit and a control method of a pump laser and a erbium-doped fiber amplifier, which can effectively save the power consumption of the pump laser.
In one aspect, a control circuit of a pump laser according to an embodiment of the present invention includes:
the signal analysis module is used for analyzing the pulse signal to obtain frequency information and amplitude information of the pulse signal, and converting the amplitude information of the pulse signal into a corresponding constant voltage signal;
the constant current driving module is respectively and electrically connected with the signal analysis module and the pump laser and is used for controlling the on and off of the pump laser according to the frequency information of the pulse signal and realizing constant current driving of the pump laser according to the constant voltage signal;
the main control module is electrically connected with the constant current driving module and is used for obtaining the working current of the pumping laser and controlling the working state of the pumping laser;
and the power supply module is used for providing working power for the signal analysis module, the constant current driving module and the main control module.
According to some embodiments of the invention, the signal parsing module comprises:
an input port for inputting the pulse signal;
the input end of the amplifying unit is electrically connected with the input port, and the amplifying unit is used for amplifying the pulse signal, obtaining the frequency information of the pulse signal and sending the frequency information of the pulse signal to the constant current driving module;
the controlled end of the analog switch is electrically connected with the output end of the amplifying unit;
the first input end of the first voltage following unit is electrically connected with the input port, and the output end of the first voltage following unit is electrically connected with the input end of the analog switch; the output end of the analog switch is also electrically connected with the second input end of the first voltage following unit;
the first end of the charging capacitor is electrically connected with the output end of the analog switch, and the second end of the charging capacitor is grounded;
the first input end of the second voltage following unit is respectively and electrically connected with the first end of the charging capacitor and the output end of the analog switch, the output end of the second voltage following unit is electrically connected with the constant current driving module, and the output end of the second voltage following unit is also electrically connected with the second input end of the second voltage following unit.
According to some embodiments of the invention, the amplifying unit comprises:
the non-inverting input end of the first operational amplifier is electrically connected with the input port through a first resistor, the inverting input end of the first operational amplifier is grounded through a second resistor and a first capacitor which are mutually connected in parallel, and the output end of the first operational amplifier is electrically connected with the constant current driving module through a third resistor;
the non-inverting input end of the second operational amplifier is electrically connected with the output end of the first operational amplifier through a second capacitor, the inverting input end of the second operational amplifier is grounded through a fourth resistor, and the output end of the second operational amplifier is electrically connected with the controlled end of the analog switch through a fifth resistor.
According to some embodiments of the invention, the first voltage follower unit comprises:
the non-inverting input end of the third operational amplifier is electrically connected with the input port through a first resistor, the output end of the third operational amplifier is electrically connected with the input end of the analog switch through a sixth resistor, and the inverting input end of the third operational amplifier is electrically connected with the output end of the analog switch.
According to some embodiments of the invention, the second voltage follower unit comprises:
and the non-inverting input end of the fourth operational amplifier is respectively and electrically connected with the output end of the analog switch and the first end of the charging capacitor, and the output end of the fourth operational amplifier is electrically connected with the inverting input end of the fourth operational amplifier.
According to some embodiments of the invention, the constant current driving module includes:
the grid electrode of the first MOS tube is used for being connected with the frequency information of the pulse signals sent by the signal analysis module, and the source electrode of the first MOS tube is electrically connected with the power supply module;
the inverting input end of the fifth operational amplifier is electrically connected with the drain electrode of the first MOS tube, and the non-inverting input end of the fifth operational amplifier is connected with the constant voltage signal through a voltage dividing unit;
the source electrode of the second MOS tube is grounded through a seventh resistor, the grid electrode of the second MOS tube is electrically connected with the output end of the fifth operational amplifier through an eighth resistor, and the drain electrode of the second MOS tube is electrically connected with the cathode of the pumping laser;
the drain electrode of the third MOS tube is electrically connected with the anode of the pumping laser, and the source electrode of the third MOS tube is electrically connected with the power supply module;
the drain electrode of the fourth MOS tube is electrically connected with the grid electrode of the third MOS tube, the source electrode of the fourth MOS tube is grounded, and the grid electrode of the fourth MOS tube is electrically connected with the main control module through a ninth resistor;
and the non-inverting input end of the sixth operational amplifier is electrically connected with the source electrode of the second MOS tube through a tenth resistor, the inverting input end of the sixth operational amplifier is electrically connected with the output end of the sixth operational amplifier through an eleventh resistor, and the output end of the sixth operational amplifier is electrically connected with the main control module through a twelfth resistor.
According to some embodiments of the invention, the master control module comprises:
the microprocessor is respectively and electrically connected with the constant current driving module and the power supply module;
and the crystal oscillator is electrically connected with the microprocessor and is used for providing an oscillating signal for the microprocessor.
On the other hand, the control method of the pump laser according to the embodiment of the invention comprises the following steps:
acquiring a pulse signal;
analyzing the pulse signal to obtain frequency information and amplitude information of the pulse signal, and converting the amplitude information of the pulse signal into a corresponding constant voltage signal;
controlling the on and off of the pump laser according to the frequency information of the pulse signal;
and driving the pump laser in a constant current mode according to the constant voltage signal.
According to some embodiments of the invention, the method for controlling a pump laser further comprises the steps of:
acquiring the working current of the pumping laser;
and controlling the working state of the pumping laser according to the working current.
On the other hand, the erbium-doped fiber amplifier according to the embodiment of the invention comprises the control circuit of the pump laser according to the embodiment of the aspect.
The control circuit and method of the pump laser and the erbium-doped fiber amplifier have at least the following beneficial effects: the frequency information and the amplitude information of the pulse signals are identified through a signal analysis module, and then the amplitude information of the pulse signals is converted into corresponding constant-voltage signals; the frequency information of the pulse signal can control the on and off of the pump laser, when the pulse signal is at a low level, the pump laser is turned off, the pump laser does not emit light at the moment, when the pulse signal is at a high level, the pump laser emits light at the moment, that is, the on and off of the pump laser is consistent with the frequency of the pulse signal, the pump laser does not need to be in a light emitting state all the time, and therefore power consumption of the pump laser is saved. And the signal analysis module converts the amplitude information of the pulse signal into a constant voltage signal, so that the constant current driving module can realize constant current driving of the pump laser according to the constant voltage signal. According to the control circuit of the pump laser, disclosed by the embodiment of the invention, the light emitting time of the pump laser can be controlled, and the working current of the pump laser can be controlled, so that the electric energy consumption of the erbium-doped fiber amplifier is effectively reduced, the heating value of the whole machine is reduced, the standby time can be effectively prolonged at the mobile equipment end using a battery as electric power, and the reliability and the service life of the whole machine are improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic diagram of a control circuit of a pump laser according to an embodiment of the present invention;
FIG. 2 is a schematic circuit diagram of a signal analysis module according to an embodiment of the invention;
FIG. 3 is a schematic circuit diagram of a constant current driving module according to an embodiment of the present invention;
FIG. 4 is a schematic circuit diagram of a microprocessor of a main control module according to an embodiment of the present invention;
FIG. 5 is a schematic circuit diagram of a crystal oscillator of a master control module according to an embodiment of the present invention;
FIG. 6 is a schematic circuit diagram of a power module according to an embodiment of the invention;
FIG. 7 is a flow chart illustrating steps of a method for controlling a pump laser according to an embodiment of the present invention;
reference numerals:
the system comprises a signal analysis module 100, a constant current driving module 200, a pump laser 300, a main control module 400 and a power supply module 500.
Detailed Description
Reference will now be made in detail to the present embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present invention, but not to limit the scope of the present invention.
In the description of the present invention, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present invention and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present invention can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
In one aspect, as shown in fig. 1, a control circuit of a pump laser according to an embodiment of the present invention includes:
the signal analysis module 100 is configured to analyze the pulse signal, obtain frequency information and amplitude information of the pulse signal, and convert the amplitude information of the pulse signal into a corresponding constant voltage signal;
the constant current driving module 200 is electrically connected with the signal analyzing module 100 and the pump laser 300 respectively, and is used for controlling the on and off of the pump laser 300 according to the frequency information of the pulse signal and realizing constant current driving of the pump laser 300 according to the constant voltage signal;
the main control module 400 is electrically connected with the constant current driving module 200 and is used for obtaining the working current of the pump laser 300 and controlling the working state of the pump laser 300;
the power module 500 is configured to provide working power for the signal analysis module 100, the constant current driving module 200, and the main control module 400.
According to the control circuit of the pump laser, firstly, frequency information and amplitude information of a pulse signal are identified through the signal analysis module 100, and then the amplitude information of the pulse signal is converted into a corresponding constant voltage signal; the frequency information of the pulse signal can control the on and off of the pump laser 300, when the pulse signal is at a low level, the pump laser 300 is turned off, the pump laser 300 does not emit light, when the pulse signal is at a high level, the pump laser 300 is turned on, and the pump laser 300 emits light, that is, the on and off of the pump laser 300 is consistent with the frequency of the pulse signal, the pump laser 300 does not need to be in a light emitting state all the time, and thus the power consumption of the pump laser 300 is saved. After the signal analysis module 100 converts the amplitude information of the pulse signal into a constant voltage signal, the constant current driving module 200 can realize constant current driving of the pump laser 300 according to the constant voltage signal.
According to the control circuit of the pump laser, the light emitting time of the pump laser 300 can be controlled, and the working current of the pump laser can be controlled, so that the electric energy consumption of the erbium-doped fiber amplifier is effectively reduced, the heating value of the whole machine is reduced, the standby time can be effectively prolonged at the mobile equipment end using a battery as electric power, and the reliability and the service life of the whole machine are improved.
Further, as shown in fig. 2, in some embodiments of the present invention, the signal parsing module 100 includes an input port JP2, an amplifying unit 110, an analog switch U47A, a first voltage following unit 120, a charging capacitor C191 and a second voltage following unit 130; wherein, the input port JP2 is used for inputting the pulse signal; the input end of the amplifying unit 110 is electrically connected with the input port JP2, and the amplifying unit 110 is configured to amplify the pulse signal, obtain frequency information of the pulse signal, and send the frequency information of the pulse signal to the constant current driving module 200; the controlled end (i.e. 13 pins) of the analog switch U47A is electrically connected with the output end of the amplifying unit 110; a first input end of the first voltage follower unit 120 is electrically connected with the input port JP2, an output end of the first voltage follower unit 120 is electrically connected with an input end (i.e., 1 pin) of the analog switch U47A, and an output end of the analog switch U47A is electrically connected with a second input end of the first voltage follower unit 120; the first end of the charging capacitor C191 is electrically connected with the output end (namely 2 pins) of the analog switch U47A, and the second end of the charging capacitor C191 is grounded; the first input terminal of the second voltage follower unit 130 is electrically connected to the first terminal of the charging capacitor C191 and the output terminal of the analog switch U47A, respectively, the output terminal of the second voltage follower unit 130 is electrically connected to the constant current driving module 200, and the output terminal of the second voltage follower unit 130 is also electrically connected to the second input terminal of the second voltage follower unit 130.
The input port JP2 adopts an SMA connector, and after an external pulse signal is input into the circuit through the input port JP2, a part of the pulse signal enters the amplifying unit 110, and the amplifying unit 110 recognizes the frequency information of the pulse signal and sends the frequency information to the constant current driving module 200; meanwhile, the amplifying unit 110 amplifies the amplitude of the pulse signal, so that the analog switch U47A can be driven, when the pulse signal is at a high level, the controlled terminal of the analog switch U47A is at a high level, the input terminal and the output terminal of the analog switch U47A are turned on, when the pulse signal is at a low level, the controlled terminal of the analog switch U47A is at a low level, and the input terminal and the output terminal of the analog switch U47A are disconnected. Meanwhile, after the pulse signal enters the circuit through the input port JP2, the pulse signal is input to the analog switch U47A through the first voltage following unit 120, and when the analog switch U47A is in a conducting state, the pulse signal can charge the charging capacitor C191, so that the voltage of the charging capacitor C191 is equal to the amplitude of the pulse signal, and the amplitude information of the pulse signal is converted into a corresponding constant voltage signal; when the pulse signal is at a low level, the analog switch U47A is turned off, and the charging capacitor C191 is not charged at this time. Meanwhile, the charging capacitor C191 is also connected in parallel with the resistor R212.
Further, as shown in fig. 2, in some embodiments of the present invention, the amplifying unit 110 includes a first operational amplifier U42A and a second operational amplifier U42B, the non-inverting input terminal of the first operational amplifier U42A is electrically connected to the input port JP2 through a first resistor R199, the inverting input terminal of the first operational amplifier U42A is grounded through a second resistor R206 and a first capacitor C190 connected in parallel, and the output terminal of the first operational amplifier U42A is electrically connected to the constant current driving module 200 through a third resistor R203; the non-inverting input end of the second operational amplifier U42B is electrically connected with the output end of the first operational amplifier U42A through a second capacitor C183, the inverting input end of the second operational amplifier U42B is grounded through a fourth resistor R208, and the output end of the second operational amplifier U42B is electrically connected with the controlled end of the analog switch U47A through a fifth resistor R209.
After an external pulse signal is input through an input port JP2 and passes through a first resistor R199, a part of the pulse signal passes through a first operational amplifier U42A and amplifies the pulse amplitude of the input signal, and an output signal of the first operational amplifier U42A is sent to the constant current driving module 200 through a third resistor R203, so that frequency information of the pulse signal is sent to the constant current driving module 200; meanwhile, the output signal of the first operational amplifier U42A passes through a differential circuit formed by a second capacitor C183 and a resistor R207, and then passes through a comparison circuit formed by a second operational amplifier U42B, a resistor R205 and a fourth resistor R208 to form a narrow pulse signal of about 5us, and the narrow pulse signal controls the on and off of the analog switch U47A after passing through a fifth resistor R209; the analog switch U47A is turned on when the pulse signal is at a high level, and the analog switch U47A is turned off when the pulse signal is at a low level.
Further, as shown in fig. 2, in some embodiments of the present invention, the first voltage follower unit 120 includes a third operational amplifier U46A, a non-inverting input terminal of the third operational amplifier U46A is electrically connected to the input port JP2 through a first resistor R199, an output terminal of the third operational amplifier U46A is electrically connected to an input terminal of the analog switch U47A through a sixth resistor R211, and an inverting input terminal of the third operational amplifier U46A is electrically connected to an output terminal of the analog switch U47A. After the external pulse signal is input through the input port JP2, after passing through the first resistor R199, a part of the pulse signal passes through a voltage follower formed by the third operational amplifier U46A and the sixth resistor R211 and is input into the analog switch U47A, when the analog switch U47A is in a conducting state, the charging capacitor C191 is charged, after the charging capacitor C191 is circularly charged for a plurality of times, the voltage is always maintained at a stable value, and the amplitude of the voltage is the same as the amplitude of the high level of the input pulse signal, so that the amplitude of the pulse signal is analyzed to be a constant voltage value.
As shown in fig. 2, in some embodiments of the present invention, the second voltage follower unit 130 includes a fourth operational amplifier U46B, the non-inverting input terminal of the fourth operational amplifier U46B is electrically connected to the output terminal of the analog switch U47A and the first terminal of the charging capacitor C191, the output terminal of the fourth operational amplifier U46B is electrically connected to the inverting input terminal of the fourth operational amplifier U46B, and the output terminal of the fourth operational amplifier U46B is also electrically connected to the constant current driving module 200. After the amplitude information of the pulse signal is analyzed into a constant voltage value of the charge capacitor C191, the constant voltage signal is passed through a voltage follower constituted by the fourth operational amplifier U46B, and the driving capability of the constant voltage signal is increased, and then the constant voltage signal is transmitted to the constant current driving module 200.
As shown in fig. 3, in some embodiments of the present invention, the constant current driving module 200 includes a first MOS transistor Q1, a fifth operational amplifier U45A, a second MOS transistor Q2, a third MOS transistor U43, a fourth MOS transistor Q4, and a sixth operational amplifier U45B; the grid electrode of the first MOS tube Q1 is connected with the frequency information of a Pulse Signal sent by the first operational amplifier U42A of the Signal analysis module 100 through a pulse_Signal Signal, the source electrode of the first MOS tube Q1 is connected with a VDC_ +3.3V power supply sent by the power supply module 500, the drain electrode of the first MOS tube Q1 is electrically connected with the inverting input end of the fifth operational amplifier U45A, the non-inverting input end of the fifth operational amplifier U45A is connected with a constant voltage Signal sent by the fourth operational amplifier U46B of the Signal analysis module 100 through a voltage division unit formed by a resistor R216 and a resistor R218, the output end of the fifth operational amplifier U45A is electrically connected with the grid electrode of the second MOS tube Q2 through an eighth resistor R217, the source electrode of the second MOS tube Q2 is grounded through a seventh resistor R223, the drain electrode of the second MOS tube Q2 is electrically connected with the cathode electrode of the pump laser 300, the anode of the pump laser 300 is electrically connected with the drain electrode of the third MOS tube U43, and the source electrode of the third MOS tube U43 is electrically connected with the VDC_ 3.3V power supply sent by the power supply module 500; the grid electrode of the third MOS tube U43 is electrically connected with the drain electrode of the fourth MOS tube Q4, the source electrode of the fourth MOS tube Q4 is grounded, and the grid electrode of the fourth MOS tube Q4 is electrically connected with the LD_SD signal of the main control module 100 through a ninth resistor R239; the non-inverting input terminal of the sixth operational amplifier U45B is electrically connected to the source of the second MOS transistor Q2 through the tenth resistor R220, the inverting input terminal of the sixth operational amplifier U45B is electrically connected to the output terminal of the sixth operational amplifier U45B through the eleventh resistor R225, and the output terminal of the sixth operational amplifier U45B is electrically connected to the current_adc signal of the main control module 400 through the twelfth resistor R221.
After the externally input pulse signal passes through the signal analysis module 100, the first operational amplifier U42A of the signal analysis module 100 inputs the analyzed frequency information (pulse signal) to the first MOS transistor Q1 sent to the constant current driving module 200, and controls the on and off of the first MOS transistor Q1; meanwhile, the signal analysis module 100 inputs the constant voltage signal obtained by analysis to the fifth operational amplifier U45A of the constant current driving module 200 after passing through the voltage division unit formed by the resistors R216 and R218, and at this time, as long as the ld_sd signal sent by the main control module 400 is at a high level, the fourth MOS transistor Q4 is turned on, and then the third MOS transistor U43 is controlled to be turned on, so that the power vdc_ +3.3v passes through the third MOS transistor U43, and then passes through the pump laser 300, the second MOS transistor Q2, the resistors R223 and R224 to form a loop, so that the pump laser 300 emits light after being powered on; meanwhile, the current flowing through the pump laser 300 is fed back to the 2 pin of the fifth operational amplifier U45A through the resistors R223 and R224 and is compared with the constant voltage signal of the 3 pin of the fifth operational amplifier U45A, so that the on and off of the second MOS tube Q2 are timely controlled, and then the current flowing through the pump laser 300 is controlled, and the constant current output of the pump laser 300 is realized. When the low level of the external pulse signal is input, the first operational amplifier U42A outputs the low level to the first MOS transistor Q1 through the third resistor R203, so that the first MOS transistor Q1 is turned on, vdc_ +3.3v is input to the 2 pin of the fifth operational amplifier U45A after passing through the first MOS transistor Q1, at this time, the voltage of the 3 pin of the fifth operational amplifier U45A is lower than the voltage of the 2 pin, so that the fifth operational amplifier U45A outputs the low level, and the second MOS transistor Q2 is controlled to be turned off, at this time, the pump laser 300 stops working; similarly, when the high level of the external pulse signal is input, the first MOS transistor Q1 is turned off, and at this time, the fifth operational amplifier U45A controls the on and off of the second MOS transistor Q2 according to the constant voltage signal and the signal fed back by the pump laser 300, so as to realize constant current driving of the pump laser 300.
As shown in fig. 4, in some embodiments of the present invention, the main control module 400 includes a microprocessor U11 and a crystal oscillator U12, wherein the microprocessor U11 is electrically connected to the constant current driving module 200 and the power module 500, and the crystal oscillator U12 is electrically connected to the microprocessor U11 for providing an oscillation signal to the microprocessor U11. Specifically, in the present example, the microprocessor U11 is an MCU with a model MK22FN512VLL12, and it should be noted that the microprocessor U11 may also be a processor with another model, which is not limited thereto. The 99 pin (namely, LD_SD signal) of the microprocessor U11 is connected with the grid electrode of the fourth MOS transistor Q4 of the constant current driving module 200 through a ninth resistor R239, and is used for controlling the on and off of the fourth MOS transistor Q4, thereby controlling the working state of the pumping laser 300; the 2 pin of the microprocessor U11 (namely the current_ADC signal) is connected with the output end of the sixth operational amplifier U45B of the constant CURRENT driving module 200 through a twelfth resistor R221; the sixth operational amplifier U45B can collect and amplify the working current of the pump laser 300, and send the working current to the microprocessor U11, so that the microprocessor U11 can monitor the working current of the pump laser 300 in real time, and thus can timely control the working state of the pump laser 300 through the 99 pin. In this example, crystal oscillator U12 may take the form of CSX-750FBC16000000T or the like, providing microprocessor U11 with a 16M oscillating signal for the establishment of instruction cycles by microprocessor U11.
As shown in fig. 6, in some embodiments of the invention, the power module 500 is connected to an external 24V power supply through a connector J3 to supply power to the entire system. The U5 chip is a DC-DC chip, the externally input 24V power supply is reduced to 3.3V direct current power supplies (VDC_ +3.3V and VDD_3.3V) through the cooperation of the main electronic components such as the MOS transistors U6 and U7, the energy storage inductor L4 and the like, the MOS transistors U6 and U7 mainly play a role of chopping, the 24V power supply is controlled to continuously switch the MOS transistors U6 and U7 according to pulse signals output by the U5 from 14 pins and 17 pins, and the stable 3.3V voltage is finally output through the energy storage and filtering of the energy storage inductor L4, so that a working power supply is provided for other modules.
According to the control circuit of the pump laser, the light emitting time of the pump laser 300 can be controlled, and the working current of the pump laser can be controlled, so that the electric energy consumption of the erbium-doped fiber amplifier is effectively reduced, the heating value of the whole machine is reduced, the standby time can be effectively prolonged at the mobile equipment end using a battery as electric power, and the reliability and the service life of the whole machine are improved.
On the other hand, the embodiment of the invention also provides a erbium-doped optical fiber amplifier, which comprises the control circuit of the pump laser, and by adopting the control circuit of the pump laser, the power consumption of the erbium-doped optical fiber amplifier can be effectively reduced, and the reliability and the service life of the erbium-doped optical fiber amplifier can be improved.
On the other hand, the embodiment of the invention also provides a control method of the pump laser, as shown in fig. 7, comprising the following steps:
step S100: acquiring a pulse signal;
step S200: analyzing the pulse signal to obtain frequency information and amplitude information of the pulse signal, and converting the amplitude information of the pulse signal into a corresponding constant voltage signal;
step S300: controlling the on and off of the pump laser 300 according to the frequency information of the pulse signal;
step S400: the pump laser 300 is constant-current driven according to the constant-voltage signal.
First, an external pulse signal is acquired from an input port JP2 shown in fig. 2; then, the signal analysis module 100 analyzes the pulse signal to obtain frequency information and amplitude information of the pulse signal, and converts the amplitude information of the pulse signal into a corresponding constant voltage signal. Specifically, after an external pulse signal is input through the input port JP2 and passes through the first resistor R199, a part of the pulse signal passes through the first operational amplifier U42A, and then the pulse amplitude of the input signal is amplified, and the output signal of the first operational amplifier U42A is sent to the constant current driving module 200 through the third resistor R203, so that the frequency information of the pulse signal is sent to the constant current driving module 200; meanwhile, the output signal of the first operational amplifier U42A passes through a differential circuit formed by a second capacitor C183 and a resistor R207, and then passes through a comparison circuit formed by a second operational amplifier U42B, a resistor R205 and a fourth resistor R208 to form a narrow pulse signal of about 5us, and the narrow pulse signal controls the on and off of the analog switch U47A after passing through a fifth resistor R209; the analog switch U47A is turned on when the pulse signal is at a high level, and the analog switch U47A is turned off when the pulse signal is at a low level. The pulse signal is input through the input port JP2 and passes through the first resistor R199, the other part of the pulse signal passes through a voltage follower formed by the third operational amplifier U46A and the sixth resistor R211 and then is input into the analog switch U47A, when the analog switch U47A is in a conducting state, the charging capacitor C191 is charged, the voltage is always maintained at a stable value after the charging capacitor C191 is circularly charged for a plurality of times, and the amplitude of the voltage is the same as the amplitude of the high level of the input pulse signal, so that the amplitude of the pulse signal is analyzed to be a constant voltage value. After the amplitude information of the pulse signal is analyzed into a constant voltage value of the charge capacitor C191, the constant voltage signal passes through a voltage follower constituted by the fourth operational amplifier U46B, and the driving capability of the constant voltage signal is increased, and then the constant current driving module 200 is transmitted.
After the signal analysis module 100 analyzes the frequency information of the pulse signal and the corresponding constant voltage signal, the constant current driving module 200 controls the on and off of the pump laser 300 according to the frequency information of the pulse signal, and performs constant current driving on the pump laser 300 according to the constant voltage signal. Specifically, after the externally input pulse signal passes through the signal analysis module 100, the first operational amplifier U42A of the signal analysis module 100 inputs the analyzed frequency information (pulse signal) to the first MOS transistor Q1 sent to the constant current driving module 200, and controls the on and off of the same; meanwhile, the signal analysis module 100 inputs the constant voltage signal obtained by analysis to the fifth operational amplifier U45A of the constant current driving module 200 after passing through the voltage division unit formed by the resistors R216 and R218, and at this time, as long as the ld_sd signal sent by the main control module 400 is at a high level, the fourth MOS transistor Q4 is turned on, and then the third MOS transistor U43 is controlled to be turned on, so that the power vdc_ +3.3v passes through the third MOS transistor U43, and then passes through the pump laser 300, the second MOS transistor Q2, the resistors R223 and R224 to form a loop, so that the pump laser 300 emits light after being powered on; meanwhile, the current flowing through the pump laser 300 is fed back to the 2 pin of the fifth operational amplifier U45A through the resistors R223 and R224 and is compared with the constant voltage signal of the 3 pin of the fifth operational amplifier U45A, so that the on and off of the second MOS tube Q2 are timely controlled, and then the current flowing through the pump laser 300 is controlled, and the constant current output of the pump laser 300 is realized. When the low level of the external pulse signal is input, the first operational amplifier U42A outputs the low level to the first MOS transistor Q1 through the third resistor R203, so that the first MOS transistor Q1 is turned on, vdc_ +3.3v is input to the 2 pin of the fifth operational amplifier U45A after passing through the first MOS transistor Q1, at this time, the voltage of the 3 pin of the fifth operational amplifier U45A is lower than the voltage of the 2 pin, so that the fifth operational amplifier U45A outputs the low level, and the second MOS transistor Q2 is controlled to be turned off, at this time, the pump laser 300 stops working; similarly, when the high level of the external pulse signal is input, the first MOS transistor Q1 is turned off, and at this time, the fifth operational amplifier U45A controls the on and off of the second MOS transistor Q2 according to the constant voltage signal and the signal fed back by the pump laser 300, so as to realize constant current driving of the pump laser 300.
Further, the control method of the pump laser according to the embodiment of the invention further comprises the following steps:
acquiring the working current of the pump laser 300;
according to the operation current, the operation state of the pump laser 300 is controlled.
Specifically, a pin 99 (i.e., ld_sd signal) of the microprocessor U11 of the main control module 400 is connected to the gate of the fourth MOS transistor Q4 of the constant current driving module 200 through a ninth resistor R239, so as to control the on and off of the fourth MOS transistor Q4, thereby controlling the working state of the pump laser 300; the 2 pin of the microprocessor U11 (namely the current_ADC signal) is connected with the output end of the sixth operational amplifier U45B of the constant CURRENT driving module 200 through a twelfth resistor R221; the sixth operational amplifier U45B can collect and amplify the working current of the pump laser 300, and send the working current to the microprocessor U11, so that the microprocessor U11 can monitor the working current of the pump laser 300 in real time, and thus can timely control the working state of the pump laser 300 through the 99 pin.
According to the control method of the pump laser, the light emitting time of the pump laser 300 can be controlled, and the working current of the pump laser can be controlled, so that the electric energy consumption of the erbium-doped fiber amplifier is effectively reduced, the heating value of the whole machine is reduced, the standby time can be effectively prolonged at the mobile equipment end using a battery as electric power, and the reliability and the service life of the whole machine are improved.
In the description of the present specification, a description referring to the terms "one embodiment," "further embodiment," "some specific embodiments," or "some examples," etc., means that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (9)
1. A control circuit for a pump laser, comprising:
the signal analysis module is used for analyzing the pulse signal to obtain frequency information and amplitude information of the pulse signal, and converting the amplitude information of the pulse signal into a corresponding constant voltage signal;
the constant current driving module is respectively and electrically connected with the signal analysis module and the pump laser and is used for controlling the on and off of the pump laser according to the frequency information of the pulse signal and realizing constant current driving of the pump laser according to the constant voltage signal;
the main control module is electrically connected with the constant current driving module and is used for obtaining the working current of the pumping laser and controlling the working state of the pumping laser;
the power supply module is used for providing working power supply for the signal analysis module, the constant current driving module and the main control module;
the signal analysis module comprises:
an input port for inputting the pulse signal;
the input end of the amplifying unit is electrically connected with the input port, and the amplifying unit is used for amplifying the pulse signal, obtaining the frequency information of the pulse signal and sending the frequency information of the pulse signal to the constant current driving module;
the controlled end of the analog switch is electrically connected with the output end of the amplifying unit;
the first input end of the first voltage following unit is electrically connected with the input port, and the output end of the first voltage following unit is electrically connected with the input end of the analog switch; the output end of the analog switch is also electrically connected with the second input end of the first voltage following unit;
the first end of the charging capacitor is electrically connected with the output end of the analog switch, and the second end of the charging capacitor is grounded;
the first input end of the second voltage following unit is respectively and electrically connected with the first end of the charging capacitor and the output end of the analog switch, the output end of the second voltage following unit is electrically connected with the constant current driving module, and the output end of the second voltage following unit is also electrically connected with the second input end of the second voltage following unit.
2. The control circuit of a pump laser according to claim 1, wherein the amplifying unit comprises:
the non-inverting input end of the first operational amplifier is electrically connected with the input port through a first resistor, the inverting input end of the first operational amplifier is grounded through a second resistor and a first capacitor which are mutually connected in parallel, and the output end of the first operational amplifier is electrically connected with the constant current driving module through a third resistor;
the non-inverting input end of the second operational amplifier is electrically connected with the output end of the first operational amplifier through a second capacitor, the inverting input end of the second operational amplifier is grounded through a fourth resistor, and the output end of the second operational amplifier is electrically connected with the controlled end of the analog switch through a fifth resistor.
3. The control circuit of a pump laser according to claim 1, wherein the first voltage follower unit comprises:
the non-inverting input end of the third operational amplifier is electrically connected with the input port through a first resistor, the output end of the third operational amplifier is electrically connected with the input end of the analog switch through a sixth resistor, and the inverting input end of the third operational amplifier is electrically connected with the output end of the analog switch.
4. The control circuit of a pump laser according to claim 1, wherein the second voltage follower unit comprises:
and the non-inverting input end of the fourth operational amplifier is respectively and electrically connected with the output end of the analog switch and the first end of the charging capacitor, and the output end of the fourth operational amplifier is electrically connected with the inverting input end of the fourth operational amplifier.
5. The control circuit of a pump laser according to claim 1, wherein the constant current driving module comprises:
the grid electrode of the first MOS tube is used for being connected with the frequency information of the pulse signals sent by the signal analysis module, and the source electrode of the first MOS tube is electrically connected with the power supply module;
the inverting input end of the fifth operational amplifier is electrically connected with the drain electrode of the first MOS tube, and the non-inverting input end of the fifth operational amplifier is connected with the constant voltage signal through a voltage dividing unit;
the source electrode of the second MOS tube is grounded through a seventh resistor, the grid electrode of the second MOS tube is electrically connected with the output end of the fifth operational amplifier through an eighth resistor, and the drain electrode of the second MOS tube is electrically connected with the cathode of the pumping laser;
the drain electrode of the third MOS tube is electrically connected with the anode of the pumping laser, and the source electrode of the third MOS tube is electrically connected with the power supply module;
the drain electrode of the fourth MOS tube is electrically connected with the grid electrode of the third MOS tube, the source electrode of the fourth MOS tube is grounded, and the grid electrode of the fourth MOS tube is electrically connected with the main control module through a ninth resistor;
and the non-inverting input end of the sixth operational amplifier is electrically connected with the source electrode of the second MOS tube through a tenth resistor, the inverting input end of the sixth operational amplifier is electrically connected with the output end of the sixth operational amplifier through an eleventh resistor, and the output end of the sixth operational amplifier is electrically connected with the main control module through a twelfth resistor.
6. The control circuit of a pump laser according to claim 1, wherein the master control module comprises:
the microprocessor is respectively and electrically connected with the constant current driving module and the power supply module;
and the crystal oscillator is electrically connected with the microprocessor and is used for providing an oscillating signal for the microprocessor.
7. A control method of a pump laser based on a control circuit of a pump laser according to any of claims 1-6, characterized by the steps of:
acquiring a pulse signal;
the signal analysis module analyzes the pulse signal to obtain frequency information and amplitude information of the pulse signal, and converts the amplitude information of the pulse signal into a corresponding constant voltage signal;
controlling the on and off of the pump laser according to the frequency information of the pulse signal;
and driving the pump laser in a constant current mode according to the constant voltage signal.
8. The method of controlling a pump laser according to claim 7, further comprising the steps of:
acquiring the working current of the pumping laser;
and controlling the working state of the pumping laser according to the working current.
9. A erbium-doped fiber amplifier comprising a control circuit of a pump laser according to any of claims 1-6.
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| KR20130020529A (en) * | 2011-08-18 | 2013-02-27 | 김상준 | Solid state laser device and driving method of the same |
| CN112397985A (en) * | 2020-11-17 | 2021-02-23 | 华东师范大学重庆研究院 | Pump laser drive stable system |
| CN113300196A (en) * | 2021-03-30 | 2021-08-24 | 苏州创鑫激光科技有限公司 | Optical fiber laser and control method thereof |
| CN115102020A (en) * | 2022-07-14 | 2022-09-23 | 杭州奥创光子技术有限公司 | Pulse laser output control device and control method |
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| US8934509B2 (en) * | 2009-11-23 | 2015-01-13 | Lockheed Martin Corporation | Q-switched oscillator seed-source for MOPA laser illuminator method and apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130020529A (en) * | 2011-08-18 | 2013-02-27 | 김상준 | Solid state laser device and driving method of the same |
| CN112397985A (en) * | 2020-11-17 | 2021-02-23 | 华东师范大学重庆研究院 | Pump laser drive stable system |
| CN113300196A (en) * | 2021-03-30 | 2021-08-24 | 苏州创鑫激光科技有限公司 | Optical fiber laser and control method thereof |
| CN115102020A (en) * | 2022-07-14 | 2022-09-23 | 杭州奥创光子技术有限公司 | Pulse laser output control device and control method |
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