CN115548845B - Laser with unattenuated output power and control method thereof - Google Patents
Laser with unattenuated output power and control method thereof Download PDFInfo
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- CN115548845B CN115548845B CN202211361806.4A CN202211361806A CN115548845B CN 115548845 B CN115548845 B CN 115548845B CN 202211361806 A CN202211361806 A CN 202211361806A CN 115548845 B CN115548845 B CN 115548845B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
- H04B10/07955—Monitoring or measuring power
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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
- H01S3/0014—Monitoring arrangements not otherwise provided for
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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
- H01S3/05—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
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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
- H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
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Abstract
The invention provides a laser with unattenuated output power and a control method thereof. The laser comprises an optical module, a QBH laser output end, a laser detection module and a man-machine interface; the laser signal output end of the optical module is electrically connected with the QBH laser output end; the laser power signal input end of the laser detection module is connected with the laser power signal output end of the optical module; and the power signal output end of the laser detection module is connected with the power signal input end of the optical module.
Description
Technical Field
The invention provides a laser with unattenuated output power and a control method thereof, belonging to the technical field of fiber lasers.
Background
In the existing fiber lasers in the laser market, a detection resistor is connected in series on a current loop of a laser pumping source, and the output power of the fiber lasers is controlled by converting the current passing through the detection resistor into voltage to perform real-time feedback signal and reference voltage comparison, so that stable laser energy output by the fiber lasers is realized. The method has the defects that the change of laser output power can be influenced by the change of a laser pumping source along with the temperature (the thermal parameter of the pumping source is shown in table: the temperature drift coefficient), and the laser output energy is unstable when the aging screen of the laser pumping source is operated for a long time to reduce the output of the laser power. The problem of laser output stability of a processing point cannot be solved because the processing device is affected, the device is processed by operating the fiber laser in actual use, and the stability of laser energy processing is achieved by changing the processing parameters of the laser frequently.
Disclosure of Invention
The invention provides a laser with unattenuated output power and a control method thereof, which are used for solving the problem of poor output energy stability of the traditional fiber laser in the prior art, and the adopted technical scheme is as follows:
The laser device with unattenuated output power comprises an optical module, a QBH laser output end, a laser detection module and a human-computer interface; the laser signal output end of the optical module is electrically connected with the QBH laser output end; the laser power signal input end of the laser detection module is connected with the laser power signal output end of the optical module; and the power signal output end of the laser detection module is connected with the power signal input end of the optical module.
Further, the optical module comprises a pump source, a gain fiber and a stripper; the power supply signal input end of the pumping source is the power supply signal input end of the optical module; the gain optical fiber is arranged on a connecting line between the pumping source and the film stripping device; the optical signal output end of the film stripper is the laser signal output end of the optical module.
Further, the laser detection module comprises a laser detection amplifying circuit, a main control circuit, a comparison amplifying circuit and a power supply module; the laser power signal input end of the laser detection amplifying circuit is the laser power signal input end of the laser detection module; the feedback signal output end of the laser detection amplifying circuit is connected with one comparison signal input end of the comparison amplifying circuit; the signal output end of the comparison amplifying circuit is connected with the comparison signal input end of the power supply module; the positive and negative signal output ends of the power supply module are correspondingly connected with the positive and negative signal input ends of the pumping source in the optical module; the positive signal output end of the power supply module is connected with the power supply signal input end of the main control circuit.
Further, the laser detection amplifying circuit comprises a laser detection unit and a signal amplifying circuit; the laser power signal input end of the laser detection unit is the laser power signal input end of the laser detection amplifying circuit; the signal output end of the laser detection unit is connected with the signal input end of the signal amplification circuit; the signal output end of the signal amplifying circuit is the feedback signal output end of the laser detection amplifying circuit.
Further, the power supply module comprises a constant current source and a direct current power supply; the signal input end of the constant current source is the comparison signal input end of the power supply module; the power supply signal output end of the constant current source is the positive electrode signal output end of the power supply module; the power signal output end of the direct current power supply is the negative electrode signal output end of the power module.
A control method of a laser whose output power is not attenuated, the control method comprising:
detecting a laser power signal of the optical module, which changes along with the laser size, through a laser detection module;
The laser detection module adjusts the power supply current input to the optical module by the laser detection module according to the detected laser power signal of the optical module and the power supply signal detected by the main control circuit in the laser detection module;
The optical module adjusts the laser output power after receiving the adjusted power supply current input by the laser detection module;
and displaying the laser power signal change condition of the optical module in real time through a human-computer interface.
Further, the detecting, by the laser detection module, the laser power signal of the optical module, which varies with the laser size, includes:
The laser detection amplifying circuit of the laser detection module detects the laser output power emitted by the optical module in real time through a laser detection unit arranged in the laser detection amplifying circuit;
the laser detection unit converts the laser output power into an electric signal and sends the electric signal to a signal amplification circuit arranged in the laser detection amplification circuit for signal amplification, so that a real-time amplified signal corresponding to a laser power signal of the optical module, which changes along with the laser size, is obtained.
Further, the laser detection module adjusts the power supply current input to the optical module by the laser detection module according to the detected laser power signal of the optical module and the power supply signal detected by the main control circuit inside the laser detection module, and the laser detection module comprises:
Inputting a real-time amplified signal corresponding to a laser power signal of the optical module, which changes along with the laser size, as a feedback signal to a comparison amplifying circuit arranged in the laser detection module;
collecting current signals output by a constant current source arranged in the laser detection module in real time through a main control circuit, converting the current signals into reference signals and inputting the reference signals into the comparison amplifying circuit;
And the comparison amplifying circuit compares the reference signal with the feedback signal to obtain a comparison result, and adjusts the magnitude of the power supply current input to the optical module by the laser detection module according to the comparison result.
Further, the comparison amplifying circuit compares the reference signal with the feedback signal to obtain a comparison result, and adjusts the magnitude of the power supply current input to the optical module by the laser detection module according to the comparison result, including:
When the comparison result of the reference signal and the feedback signal judges that the laser output power output by the optical module is larger than the upper limit of the preset laser output power standard range, the constant current source reduces the current value input to the optical module according to the comparison signal output by the comparison amplifying circuit;
When the comparison result of the reference signal and the feedback signal judges that the laser output power output by the optical module is smaller than the lower limit of the preset laser output power standard range, the constant current source increases the current value input to the optical module according to the comparison signal output by the comparison amplifying circuit.
Further, the optical module adjusts the laser output power after receiving the adjusted power supply current input by the laser detection module, and the method comprises the following steps:
The laser detection module inputs the adjusted current value to an anode power supply signal input end of a pumping source of the optical module;
a direct current power supply in the laser detection module always inputs a current signal to a negative power supply signal input end of the pumping source;
And adjusting the laser output power of the optical module 1 through the change of the potential difference between the positive and negative power supply signal input ends of the pumping source.
The invention has the beneficial effects that:
The laser with unattenuated output power and the control method thereof provided by the invention acquire the laser output power by detecting the real-time variation of the laser power, convert the laser output power into a voltage signal as a real-time feedback signal to be compared with a reference voltage so as to control the output power of the fiber laser, and further realize stable laser energy output by the fiber laser. The laser and the control method thereof provided by the invention have the advantages that the PD detection device is arranged at the output end of the mode stripper of the laser pumping structure of the laser, the PD detection device is used for detecting the output power of the laser, and the detection signal is used for carrying out real-time feedback signal to adjust the output power of the laser.
Drawings
FIG. 1 is a schematic block diagram of a laser according to the present invention;
FIG. 2 is a circuit diagram of a laser according to the present invention;
FIG. 3 is a flow chart of a method of controlling a laser according to the present invention;
FIG. 4 is a diagram of pump source power parameters of the laser according to the present invention;
(1, optical module; 2, QBH laser output; 3, laser detection amplifying circuit; 4, master control circuit; 5, comparison amplifying circuit; 6, constant current source; 7, DC power supply; 8, man-machine interface).
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention.
The embodiment of the invention provides a laser with unattenuated output power, as shown in figure 1, the laser comprises an optical module 1, a QBH laser output end 2, a laser detection module and a human-computer interface 8; the laser signal output end of the optical module 1 is electrically connected with the QBH laser output end 2; the laser power signal input end of the laser detection module is connected with the laser power signal output end of the optical module 1; the power signal output end of the laser detection module is connected with the power signal input end of the optical module 1.
The optical module 1 comprises a pump source, a gain fiber and a film stripper; the power signal input end of the pump source is the power signal input end of the optical module 1; the gain optical fiber is arranged on a connecting line between the pumping source and the film stripping device; the optical signal output end of the film stripper is the laser signal output end of the optical module 1.
The laser detection module comprises a laser detection amplifying circuit 3, a main control circuit 4, a comparison amplifying circuit 5 and a power supply module; the laser power signal input end of the laser detection amplifying circuit 3 is the laser power signal input end of the laser detection module; the feedback signal output end of the laser detection amplifying circuit 3 is connected with one comparison signal input end of the comparison amplifying circuit 5; the signal output end of the comparison amplifying circuit 5 is connected with the comparison signal input end of the power supply module; the positive and negative signal output ends of the power supply module are correspondingly connected with the positive and negative signal input ends of the pumping source in the optical module 1; the positive signal output end of the power supply module is connected with the power supply signal input end of the main control circuit 4. Wherein the laser detection amplifying circuit 3 comprises a laser detection unit and a signal amplifying circuit; the laser power signal input end of the laser detection unit is the laser power signal input end of the laser detection amplifying circuit 3; the signal output end of the laser detection unit is connected with the signal input end of the signal amplification circuit; the signal output end of the signal amplifying circuit is the feedback signal output end of the laser detection amplifying circuit 3.
Wherein the power supply module comprises a constant current source 6 and a direct current power supply 7; the signal input end of the constant current source 6 is the comparison signal input end of the power supply module; the power supply signal output end of the constant current source 6 is the positive electrode signal output end of the power supply module; the power signal output end of the direct current power supply 7 is the negative electrode signal output end of the power module.
The working principle of the technical scheme is as follows: the laser device with the unattenuated output power provided by the embodiment detects the laser power signal of the optical module 1, which changes along with the laser size, through the laser detection module; the laser detection module adjusts the power supply current input to the optical module 1 by the laser detection module according to the detected laser power signal of the optical module 1 and the detected power supply signal detected by the main control circuit 4 in the laser detection module; the optical module 1 adjusts laser output power after receiving the adjusted power supply current input by the laser detection module; and displaying the laser power signal change condition of the optical module 1 in real time through a human-computer interface.
Specifically, as shown in fig. 2, when the device works normally, the laser power output detection signal detects the laser power change along with the laser size change from the output end of the mode stripper through the PD photoelectric probe of D1, the laser power change signal corresponding to the laser size change is amplified through the IC1B and IC1D operational amplifiers, and the VR1 adjustable resistor can adjust the amplification ratio to actually adjust the set output power set value of the main control circuit U2.
The main control board D point is used for setting a reference value of the output laser power of the laser, the reference value is input to a 10-pin B point of the comparator IC1C through a resistor R9 and is compared with a feedback signal detected by the PD photoelectric tube through IC1B, IC1D, R8 and IC2B to a 9-pin A point of the comparator IC1C, and then the current actually reaching the laser pumping source is regulated through constant current tubes from the resistor R6 to the Q1 to regulate the actual output laser power.
When the power screen is reduced, the constant current tube current is increased, and when the power is excessively high, the constant current tube current is reduced, and/or when the constant current tube current is reduced due to serious aging of the temperature or pumping source, and/or when the current exceeds the working current of the pumping source (the pumping source power parameter is shown as figure 4), the current detected by the current detection resistor R1 is amplified by the operational amplifier from the resistor R4 to the IC1A and then is sent to the C point U2 main control circuit through the resistor R3, and the main control circuit is interacted with the human-computer interface to show that the pumping source is aged. The U2 main control circuit outputs a current mode (a control scheme in the existing market) and a laser power detection mode without screening when E and F points are switched to a feedback mode.
The technical scheme has the effects that: the laser with unattenuated output power provided by the embodiment obtains the laser output power by detecting the real-time variation of the laser power, converts the laser output power into a voltage signal as a real-time feedback signal and compares the voltage signal with a reference voltage to control the output power of the fiber laser, so as to realize stable laser energy output by the fiber laser. The laser and the control method thereof provided by the invention have the advantages that the PD detection device is arranged at the output end of the mode stripper of the laser pumping structure of the laser, the PD detection device is used for detecting the output power of the laser, and the detection signal is used for carrying out real-time feedback signal to adjust the output power of the laser.
The embodiment of the invention provides a control method of a laser with unattenuated output power, as shown in fig. 3, the control method comprises the following steps: s1, detecting a laser power signal of the optical module 1, which changes along with the laser size, through a laser detection module;
S2, the laser detection module adjusts the power supply current input to the optical module 1 by the laser detection module according to the detected laser power signal of the optical module 1 and the detected power supply signal detected by the main control circuit 4 in the laser detection module;
S3, the optical module 1 adjusts laser output power after receiving the adjusted power supply current input by the laser detection module;
s4, displaying the laser power signal change condition of the optical module 1 in real time through a human-computer interface.
Specifically, the detecting, by the laser detection module, the laser power signal of the optical module 1, which varies with the laser size, includes:
S101, a laser detection amplifying circuit 3 of the laser detection module detects the magnitude of laser output power emitted by the optical module 1 in real time through a laser detection unit arranged in the laser detection amplifying circuit;
S102, the laser detection unit converts the laser output power into an electric signal and sends the electric signal to a signal amplification circuit arranged in the laser detection amplification circuit 3 for signal amplification, and a real-time amplification signal corresponding to a laser power signal of the optical module 1, which changes along with the laser size, is obtained.
Specifically, the laser detection module adjusts the power supply current input to the optical module 1 by the laser detection module according to the detected laser power signal of the optical module 1 and the power supply signal detected by the main control circuit 4 inside the laser detection module adjustment, and includes:
S201, inputting a real-time amplification signal corresponding to a laser power signal of the optical module 1, which changes along with the laser size, as a feedback signal to a comparison amplification circuit 5 arranged inside the laser detection module;
S202, collecting current signals output by a constant current source 6 arranged in the laser detection module in real time through a main control circuit, converting the current signals into reference signals, and inputting the reference signals into a comparison amplifying circuit 5;
And S203, the comparison amplifying circuit 5 compares the reference signal with the feedback signal to obtain a comparison result, and adjusts the magnitude of the power supply current input to the optical module 1 by the laser detection module according to the comparison result.
Specifically, the comparing and amplifying circuit 5 compares the reference signal with the feedback signal to obtain a comparison result, and adjusts the magnitude of the power supply current input to the optical module 1 by the laser detection module according to the comparison result, including:
s2031, when it is determined by the comparison result of the reference signal and the feedback signal that the laser output power output by the optical module 1 is greater than the preset upper limit of the standard range of laser output power, the constant current source 6 reduces the current value input to the optical module 1 according to the comparison signal output by the comparison amplifying circuit 5;
s2032, when it is determined that the laser output power output by the optical module 1 is smaller than the lower limit of the preset laser output power standard range according to the comparison result of the reference signal and the feedback signal, the constant current source 6 increases the current value input to the optical module 1 according to the comparison signal output by the comparison amplifying circuit 5.
Wherein the current value of the constant current source 6 is increased and decreased by an excessive amount within a unit time, the aging speed of the pumping source is increased by the excessive amount, the service life of the laser element is further reduced, and the cost and the resource waste are caused by the maintenance and replacement of components, wherein the unit time is 1s, and the current value of the constant current source 6 is increased and decreased by an amount within the unit time by the following formula:
Wherein I represents the magnitude of the current value of the constant current source 6 rising and falling in a unit time; i b denotes that the current value of the constant current source 6 increases and decreases the corresponding target current value; i 1 denotes an actual output current value of the present constant current source 6; i 0 denotes a current difference between the output current of the present constant current source and the target current value when the output current value of the constant current source needs to be adjusted.
According to the formula, the amplitude of the current value of the constant current source 6 in unit time is adaptively adjusted according to the alignment condition of the actual output current of the constant current source, so that the amplitude of the current value of the constant current source 6 in unit time is always matched with the actual output current value of the constant current source 6, the problem that the aging speed of a pumping source cannot be increased greatly due to the fact that the amplitude of the current value of the constant current source 6 in unit time is increased and reduced can be prevented, and the service life of a laser element is reduced is solved.
The optical module 1 adjusts laser output power after receiving the adjusted power supply current input by the laser detection module, and includes:
S301, the laser detection module inputs the adjusted current value to an anode power supply signal input end of a pumping source of the optical module 1;
S302, a direct current power supply 7 in the laser detection module always inputs a current signal to a negative power supply signal input end of the pumping source;
S303, adjusting the laser output power of the optical module 1 through the change of the potential difference between the positive and negative power supply signal input ends of the pumping source.
The working principle of the technical scheme is as follows: detecting a laser power signal of the optical module 1, which changes along with the laser size, through a laser detection module; the laser detection module adjusts the power supply current input to the optical module 1 by the laser detection module according to the detected laser power signal of the optical module 1 and the detected power supply signal detected by the main control circuit 4 in the laser detection module; the optical module 1 adjusts laser output power after receiving the adjusted power supply current input by the laser detection module; and displaying the laser power signal change condition of the optical module 1 in real time through a human-computer interface. Specifically, as shown in fig. 2, when the device works normally, the laser power output detection signal detects the laser power change along with the laser size change from the output end of the mode stripper through the PD photoelectric probe of D1, the laser power change signal corresponding to the laser size change is amplified through the IC1B and IC1D operational amplifiers, and the VR1 adjustable resistor can adjust the amplification ratio to actually adjust the set output power set value of the main control circuit U2.
The main control board D point is used for setting a reference value of the output laser power of the laser, the reference value is input to a 10-pin B point of the comparator IC1C through a resistor R9 and is compared with a feedback signal detected by the PD photoelectric tube through IC1B, IC1D, R8 and IC2B to a 9-pin A point of the comparator IC1C, and then the current actually reaching the laser pumping source is regulated through constant current tubes from the resistor R6 to the Q1 to regulate the actual output laser power.
When the power screen is reduced, the constant current tube current is increased, and when the power is excessively high, the constant current tube current is reduced, and/or when the constant current tube current is reduced due to serious aging of the temperature or pumping source, and/or when the current exceeds the working current of the pumping source (the pumping source power parameter is shown as figure 4), the current detected by the current detection resistor R1 is amplified by the operational amplifier from the resistor R4 to the IC1A and then is sent to the C point U2 main control circuit through the resistor R3, and the main control circuit is interacted with the human-computer interface to show that the pumping source is aged. The U2 main control circuit outputs a current mode (a control scheme in the existing market) and a laser power detection mode without screening when E and F points are switched to a feedback mode.
The technical scheme has the effects that: the laser output power is obtained by detecting the real-time change condition of the laser power, the laser output power is converted into a voltage signal which is used as a real-time feedback signal to be compared with a reference voltage to control the output power of the fiber laser, and further stable laser energy of the fiber laser output is realized. The laser and the control method thereof provided by the invention have the advantages that the PD detection device is arranged at the output end of the mode stripper of the laser pumping structure of the laser, the PD detection device is used for detecting the output power of the laser, and the detection signal is used for carrying out real-time feedback signal to adjust the output power of the laser.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (8)
1. The laser device with unattenuated output power is characterized by comprising an optical module (1), a QBH laser output end (2), a laser detection module and a human-computer interface (8); the laser signal output end of the optical module (1) is electrically connected with the QBH laser output end (2); the laser power signal input end of the laser detection module is connected with the laser power signal output end of the optical module (1); the power supply signal output end of the laser detection module is connected with the power supply signal input end of the optical module (1);
The laser detection module adjusts the power supply current input to the optical module (1) by the laser detection module according to the detected laser power signal of the optical module (1) and the power supply signal detected by the main control circuit (4) in the laser detection module;
Inputting a real-time amplified signal corresponding to a laser power signal of the optical module (1) which changes along with the laser size as a feedback signal to a comparison amplifying circuit (5) arranged in the laser detection module;
Collecting current signals output by a constant current source (6) arranged in the laser detection module in real time through a main control circuit, converting the current signals into reference signals and inputting the reference signals into a comparison amplifying circuit (5);
The comparison amplifying circuit (5) compares the reference signal with the feedback signal to obtain a comparison result, and adjusts the magnitude of the power supply current input to the optical module (1) of the laser detection module according to the comparison result;
When the comparison result of the reference signal and the feedback signal judges that the laser output power output by the optical module (1) is larger than the upper limit of the preset laser output power standard range, the constant current source (6) reduces the current value input to the optical module (1) according to the comparison signal output by the comparison amplifying circuit (5);
when the comparison result of the reference signal and the feedback signal judges that the laser output power output by the optical module (1) is smaller than the lower limit of the preset laser output power standard range, the constant current source (6) increases the current value input to the optical module (1) according to the comparison signal output by the comparison amplifying circuit (5);
The current value of the constant current source (6) is increased and decreased by an excessive amount within a unit time, the aging speed of the pumping source is increased by the excessive amount, the service life of the laser element is further reduced, and cost and resource waste are caused by maintenance and replacement of components, wherein the unit time is 1s, and the current value of the constant current source (6) is increased and decreased by the following formula:
Wherein I represents the magnitude of the current value of the constant current source (6) rising and falling within a unit time; i b denotes that the current value of the constant current source (6) increases and decreases the corresponding target current value; i 1 represents the actual output current value of the current constant current source (6); i 0 denotes a current difference between the output current of the present constant current source and the target current value when the output current value of the constant current source needs to be adjusted.
2. The laser according to claim 1, characterized in that the optical module (1) comprises a pump source, a gain fiber and a stripper; the power supply signal input end of the pumping source is the power supply signal input end of the optical module (1); the gain optical fiber is arranged on a connecting line between the pumping source and the film stripping device; the optical signal output end of the film stripper is the laser signal output end of the optical module (1).
3. The laser according to claim 1, wherein the laser detection module comprises a laser detection amplifying circuit (3), a main control circuit (4), a comparison amplifying circuit (5) and a power supply module; the laser power signal input end of the laser detection amplifying circuit (3) is the laser power signal input end of the laser detection module; the feedback signal output end of the laser detection amplifying circuit (3) is connected with one comparison signal input end of the comparison amplifying circuit (5); the signal output end of the comparison amplifying circuit (5) is connected with the comparison signal input end of the power supply module; the positive and negative signal output ends of the power supply module are correspondingly connected with the positive and negative signal input ends of the pumping source in the optical module (1); the positive signal output end of the power supply module is connected with the power supply signal input end of the main control circuit (4).
4. A laser as claimed in claim 3, characterized in that the laser detection amplifying circuit (3) comprises a laser detection unit and a signal amplifying circuit; the laser power signal input end of the laser detection unit is the laser power signal input end of the laser detection amplifying circuit (3); the signal output end of the laser detection unit is connected with the signal input end of the signal amplification circuit; the signal output end of the signal amplifying circuit is the feedback signal output end of the laser detection amplifying circuit (3).
5. A laser according to claim 3, characterized in that the power supply module comprises a constant current source (6) and a direct current power supply (7); the signal input end of the constant current source (6) is the comparison signal input end of the power supply module; the power supply signal output end of the constant current source (6) is connected with the positive electrode signal output end of the power supply module; the power signal output end of the direct current power supply (7) is the negative electrode signal output end of the power module.
6. A control method of a laser whose output power is not attenuated, the control method comprising:
detecting a laser power signal of the optical module (1) which changes along with the laser size by a laser detection module;
The laser detection module adjusts the power supply current input to the optical module (1) by the laser detection module according to the detected laser power signal of the optical module (1) and the power supply signal detected by the main control circuit (4) in the laser detection module;
the optical module (1) adjusts laser output power after receiving the adjusted power supply current input by the laser detection module;
Displaying the laser power signal change condition of the optical module (1) in real time through a human-computer interface;
Inputting a real-time amplified signal corresponding to a laser power signal of the optical module (1) which changes along with the laser size as a feedback signal to a comparison amplifying circuit (5) arranged in the laser detection module;
Collecting current signals output by a constant current source (6) arranged in the laser detection module in real time through a main control circuit, converting the current signals into reference signals and inputting the reference signals into a comparison amplifying circuit (5);
The comparison amplifying circuit (5) compares the reference signal with the feedback signal to obtain a comparison result, and adjusts the magnitude of the power supply current input to the optical module (1) of the laser detection module according to the comparison result;
When the comparison result of the reference signal and the feedback signal judges that the laser output power output by the optical module (1) is larger than the upper limit of the preset laser output power standard range, the constant current source (6) reduces the current value input to the optical module (1) according to the comparison signal output by the comparison amplifying circuit (5);
when the comparison result of the reference signal and the feedback signal judges that the laser output power output by the optical module (1) is smaller than the lower limit of the preset laser output power standard range, the constant current source (6) increases the current value input to the optical module (1) according to the comparison signal output by the comparison amplifying circuit (5);
The current value of the constant current source (6) is increased and decreased by an excessive amount within a unit time, the aging speed of the pumping source is increased by the excessive amount, the service life of the laser element is further reduced, and cost and resource waste are caused by maintenance and replacement of components, wherein the unit time is 1s, and the current value of the constant current source (6) is increased and decreased by the following formula:
Wherein I represents the magnitude of the current value of the constant current source (6) rising and falling within a unit time; i b denotes that the current value of the constant current source (6) increases and decreases the corresponding target current value; i 1 represents the actual output current value of the current constant current source (6); i 0 denotes a current difference between the output current of the present constant current source and the target current value when the output current value of the constant current source needs to be adjusted.
7. The control method according to claim 6, wherein the detecting the laser power signal of the optical module (1) according to the laser size by the laser detection module includes:
The laser detection amplifying circuit (3) of the laser detection module detects the magnitude of laser output power emitted by the optical module (1) in real time through a laser detection unit arranged in the laser detection amplifying circuit;
the laser detection unit converts the laser output power into an electric signal and sends the electric signal to a signal amplification circuit arranged in the laser detection amplification circuit (3) to amplify the signal, so that a real-time amplified signal corresponding to a laser power signal of the optical module (1) which changes along with the laser size is obtained.
8. The control method according to claim 6, wherein the optical module (1) adjusts the laser output power after receiving the adjusted power supply current input by the laser detection module, comprising:
the laser detection module inputs the adjusted current value to the positive power supply signal input end of the pumping source of the optical module (1);
A direct current power supply (7) in the laser detection module always inputs a current signal to a negative power supply signal input end of the pumping source;
And adjusting the laser output power of the optical module (1) through the change of the potential difference between the positive and negative power supply signal input ends of the pumping source.
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