CN117728278A - SBS (styrene butadiene styrene) inhibition method of high-power narrow-linewidth fiber laser - Google Patents
SBS (styrene butadiene styrene) inhibition method of high-power narrow-linewidth fiber laser Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 28
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- FACXGONDLDSNOE-UHFFFAOYSA-N buta-1,3-diene;styrene Chemical compound C=CC=C.C=CC1=CC=CC=C1.C=CC1=CC=CC=C1 FACXGONDLDSNOE-UHFFFAOYSA-N 0.000 title description 37
- 229920000468 styrene butadiene styrene block copolymer Polymers 0.000 title description 37
- 230000005764 inhibitory process Effects 0.000 title description 3
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- KWMNWMQPPKKDII-UHFFFAOYSA-N erbium ytterbium Chemical compound [Er].[Yb] KWMNWMQPPKKDII-UHFFFAOYSA-N 0.000 claims description 3
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Abstract
The invention discloses a high-power narrow-linewidth optical fiber laser SBS suppression method, which monitors reverse optical power generated by the SBS effect of a laser through a power high-speed monitor, continuously applies a feedback signal to a driving power supply, and enables the driving power supply to gradually and continuously increase current in a safe range by utilizing the relation between a relaxation oscillation overshoot peak value of a semiconductor pumping source, the current and rising edge time until the current is increased to the highest current, thereby suppressing the SBS effect excited in advance due to the relaxation oscillation of the semiconductor pumping source, improving the power utilization rate of the laser, and avoiding the damage of the laser caused by the SBS effect due to the fact that high-power pulse at the moment of light output exceeds the SBS threshold when the optical fiber amplifier outputs light under the SBS threshold power.
Description
Technical Field
The invention relates to the technical field of fiber lasers, in particular to a high-power narrow-linewidth fiber laser SBS suppression method.
Background
In recent years, high-power lasers have been rapidly developed, and among a variety of high-power lasers, fiber lasers are widely used in industrial and military fields with advantages of good beam quality, small size, high conversion efficiency, good heat dissipation effect, and the like. For the narrow linewidth fiber laser, various nonlinear effects are easy to generate after the transmission power reaches a certain level due to the relatively longer fiber length and smaller fiber core cross-sectional area, and the threshold value of SBS is the lowest among the nonlinear effects, which is the primary factor for limiting the output power of the narrow linewidth fiber laser at present. The narrow linewidth fiber laser has one basically determined SBS threshold power P in the amplifying stage based on the fiber parameters, spectral characteristics, etc th Corresponding amplifier stage pump power P pump And pumping input current I th But due to the injection of step current I by the semiconductor pump source th Instantaneously, an initial delay time t is generated due to photons d Carrier density N (t) And photon density S (t) Will change with time to cause relaxation oscillation of the pump output power, resulting in multiple higher thanSet value power P pump The pulse of the laser is further excited to an amplifying stage in advance to generate an SBS effect, so that the laser is damaged, the use current of the laser is required to be reduced in the application of the high-power narrow-linewidth optical fiber laser, but the optical fiber laser cannot reach the optimal power output, the production cost is increased, and meanwhile, the potential safety hazard exists in the use.
The high-power narrow-linewidth fiber laser for inhibiting SBS disclosed in the prior patent CN218677959U has the realization principle that SBS threshold power is increased, a plurality of optical devices are added for optical field regulation, an optical system is more complex, and the risks of reducing conversion efficiency and the like are possibly caused while the generation of SBS is inhibited.
Disclosure of Invention
In order to achieve the above object, the present invention provides a method for suppressing SBS of a high-power narrow-linewidth optical fiber laser, in which reverse optical power generated by SBS effect of the laser is monitored by a power high-speed monitor, and when the reverse optical power in the laser is stabilized within a set safety value, the power high-speed monitor sends a feedback signal to a driving power supply; after the driving power supply receives the feedback signal of the power high-speed monitor, the current is continuously increased and the next feedback signal is waited until the current is increased to the set highest current, and the step-type gradually increased current suppresses the SBS effect excited in advance due to the relaxation oscillation of the semiconductor pumping source because the relaxation oscillation overshoot peak value of the semiconductor pumping source is related to the current magnitude and the rising edge time, so that the power utilization rate of the laser is improved, and meanwhile, the use safety of the laser is also protected through the real-time monitoring of the return light power.
The invention provides a high-power narrow linewidth optical fiber laser SBS inhibition method, which comprises the following steps:
s100, after forward light output by a narrow linewidth seed source passes through an input end of a three-port isolator, entering a main amplification stage from an output port, enabling backward Stokes light generated by the main amplification stage due to an SBS effect to pass through the output port of the three-port isolator and output from an optical fiber of a light return end, monitoring light return power of the three-port isolator of a high-power narrow linewidth optical fiber laser by using a power high-speed monitor, and sending a feedback signal to a driving power supply by the power high-speed monitor when the light return power is within a set power value;
s200, continuously increasing output current after the driving power supply receives a feedback signal of the power high-speed monitor;
and S300, controlling the output power of the semiconductor pumping source to be improved through the driving power supply, further influencing the return light power of the high-power narrow-linewidth optical fiber laser, repeating S100 when the return light power is within a set power value, and stopping outputting current by the driving power supply after the return light power exceeds the set power value.
Further, the narrow linewidth seed source is a semiconductor laser or an optical fiber laser, the working wavelength of the narrow linewidth seed source is 1.0 mu m, 1.5 mu m or 2.0 mu m, the linewidth is smaller than 100GHz, and the power is larger than 20W.
Further, the three-port isolator is provided with three optical fiber output ports, the offset of the working wavelength of the three-port isolator and the working wavelength of the narrow-line-width seed source is not more than 5nm, the tolerance power of the three-port isolator is larger than the output power of the seed source, and the three-port isolator is connected with the narrow-line-width seed source and the main amplifying stage in an optical fiber fusion mode.
Further, the main amplification stage comprises a double-cladding gain optical fiber and an optical fiber combiner, wherein the double-cladding gain optical fiber is one of ytterbium-doped optical fiber, erbium-ytterbium co-doped optical fiber, thulium-doped optical fiber or thulium-holmium co-doped optical fiber, the optical fiber core is circular, and the diameter of the optical fiber core is larger than 10 mu m; the inner cladding of the optical fiber is one of hexagon, octagon, D-type and plum blossom type.
Further, the diameter of the inner cladding is larger than 125 μm, and the optical fiber combiner in the main amplification stage is an (n+1) ×1 combiner.
Further, the power high-speed monitor comprises a photoelectric detector, an optical filter, an attenuation sheet and a control circuit board, wherein the optical filter has higher transmittance to backward Stokes light wavelength than to pump light wavelength; the attenuation sheet is arranged on one side of the filter sheet and used for attenuating the backward Stokes light, so that the power of the backward Stokes light is below the saturation threshold of the photoelectric detector.
Further, the photoelectric detector receives the optical power output by the light return end of the three-port isolator, converts the optical power into a power data signal and sends the power data signal to the control circuit board, and the control circuit board monitors whether the received power data signal exceeds an alarm threshold in real time.
Further, the position of the return optical fiber of the three-port isolator is arranged near the return optical fiber output port of the three-port isolator, or the return optical fiber of the three-port isolator is corroded to the inner cladding, and the return optical fiber of the three-port isolator is arranged near the corrosion area.
Further, the driving power supply comprises a constant current power supply module and a main control board, the constant current power supply module supplies power to the pumping source, and the main control board receives signals of the high-speed monitor and controls the constant current power supply module to output current.
Further, the driving power supply applies current to the pumping source in the following process: and when the power high-speed monitor sends an alarm feedback signal, the driving power supply turns off current output.
In general, the above technical solutions conceived by the present invention, compared with the prior art, enable the following beneficial effects to be obtained:
1. the invention provides a high-power narrow-linewidth optical fiber laser SBS suppression method, which monitors reverse optical power generated by the SBS effect of a laser through a power high-speed monitor, continuously applies a feedback signal to a driving power supply, and enables the driving power supply to gradually and continuously increase current in a safe range by utilizing the relation between a relaxation oscillation overshoot peak value of a semiconductor pumping source, the current and rising edge time until the current is increased to the highest current, thereby suppressing the SBS effect excited in advance due to the relaxation oscillation of the semiconductor pumping source, improving the power utilization rate of the laser, and avoiding the damage of the laser caused by the SBS effect due to the fact that high-power pulse at the moment of light emission exceeds the SBS threshold when the optical fiber amplifier emits light under the SBS threshold power.
2. The invention provides a SBS suppression method of a high-power narrow-linewidth fiber laser, which is characterized in that the SBS optical power of the laser is monitored by a power high-speed monitor, and when the reverse optical power in the laser is stabilized within a set safety value, the power high-speed monitor sends a feedback signal to a driving power supply; after the driving power supply receives the feedback signal of the power high-speed monitor, the current is increased and the next feedback signal is waited until the current is increased to the set current, so that the step-type output current is applied to the semiconductor pumping source, and the use safety of the laser is ensured.
3. The invention provides a high-power narrow linewidth optical fiber laser SBS suppression method, which adopts a scheme of a high-power narrow linewidth optical fiber laser to be safer and has higher actual output power, and the scheme only needs to monitor the power of return light generated by an SBS effect, gradually increases the pumping source current, does not need to change the optical system of the laser, and can be used simultaneously with measures for increasing the SBS threshold power.
Drawings
FIG. 1 is a graph of relaxation oscillations of a semiconductor pump source of the present invention with a step applied current;
FIG. 2 is a schematic diagram of an apparatus for suppressing overshoot of the output light of a high power fiber laser according to the present invention;
FIG. 3 is a graph of the current applied to a pump source over time in accordance with the present invention;
fig. 4 is a flowchart of a SBS suppression method for a high-power narrow linewidth fiber laser according to an embodiment of the present invention.
Like reference numerals denote like technical features throughout the drawings, in particular: 1-narrow linewidth seed source, 2-three port isolator, 3-amplifier stage, 4-output terminal, 5-power high-speed monitor, 6-drive power supply, 7-pumping source.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
As shown in fig. 1 to 4, the invention provides a SBS suppression method for a high-power narrow linewidth fiber laser, which comprises the following steps:
s100, using a power high-speed monitor 5 to monitor the return light power of a three-port isolator 2 of a high-power narrow-linewidth fiber laser, and when the return light power is within a set power value, the power high-speed monitor 5 sends a feedback signal to a driving power supply 6;
s200, after the forward light output by the narrow linewidth seed source 1 passes through the input end of the three-port isolator 2, the forward light enters the main amplifying stage 3 from the output port; the backward Stokes light generated by the main amplifying stage 3 due to the SBS effect passes through the output port of the three-port isolator 2 and is output from the optical fiber of the light return end, and the output current is slowly increased after the driving power supply 6 receives the feedback signal of the power high-speed monitor 5;
s300, the output power of the semiconductor pump source 7 controlled by the driving power supply 6 is improved, so that the return light power of the high-power narrow-linewidth fiber laser is affected, when the return light power is within a set power value, S100 is repeated, and when the return light power exceeds the set power value, the driving power supply 6 stops outputting current.
Further, the narrow linewidth seed source 1 is a semiconductor laser, a fiber laser or other solid state laser type, the working wavelength of which can be 1.0 μm, 1.5 μm or 2.0 μm wave band, the linewidth is less than 100GHz, and the power is not lower than 20W.
Further, as shown in fig. 2, the high-power narrow-linewidth fiber laser includes a seed source 1, a three-port isolator 2, a power high-speed monitor 5, a driving power supply 6, a pump source 7, and an amplifying stage 3, wherein the power high-speed monitor 5 is disposed at a fiber-return output port of the three-port isolator 2 before the main amplifying stage 3, a filter is disposed at a monitoring port of the power high-speed monitor 5, the filter has a higher transmittance for signal light, a lower transmittance for pump light, and the amplifying stage 3 is connected with an output terminal 4.
Further, the three-port isolator 2 has three optical fiber output ports, the working wavelength of which is not more than 5nm from the working wavelength of the narrow linewidth seed source 1, the tolerance power is not lower than the output power of the seed source 1, and is connected with the narrow linewidth seed source 1 and the main amplifying stage 3 in an optical fiber fusion mode.
Further, the main amplification stage 3 comprises a double-cladding gain optical fiber and an optical fiber combiner, the double-cladding gain optical fiber in the main amplification stage 3 is one of an ytterbium-doped optical fiber, an erbium-ytterbium co-doped optical fiber, a thulium-doped optical fiber or a thulium-holmium co-doped optical fiber, the fiber core is circular, and the fiber core diameter is larger than 10 mu m; the inner cladding of the optical fiber is one of hexagon, octagon, D-type and plum blossom type; the diameter of the inner cladding is larger than 125 mu m, and the optical fiber combiner in the main amplifying stage 3 is an (n+1) x 1 combiner.
Further, the power high-speed monitor 5 includes a photodetector, an optical filter, an attenuation sheet, and a control circuit board.
Further, the position of the power high-speed monitor 5 for detecting the power of the return optical fiber of the three-port isolator 2 may be set near the output port of the return optical fiber of the three-port isolator 2, or the inner cladding may be corroded on the return optical fiber of the three-port isolator 2, and the detection position may be set near the corrosion area.
Further, a filter and an attenuation sheet are arranged at a monitoring port of the power high-speed monitor 5, the filter has higher transmissivity to backward Stokes light wavelength and lower transmissivity to pump light wavelength; the attenuation sheet is arranged on one side of the filter sheet and used for attenuating the backward Stokes light, so that the power of the backward Stokes light is lower than the saturation threshold of the photoelectric detector, and the filter sheet has higher transmissivity to signal light and lower transmissivity to pump light.
Further, the photoelectric detector in the power high-speed monitor 5 receives the optical power output by the light return end of the three-port isolator 2, converts the optical power into a power data signal and sends the power data signal to the control circuit board, and the control circuit board monitors whether the received power data signal exceeds an alarm threshold value in real time.
Further, the process of applying current to the pump source 7 by the driving power supply 6 is to increase the current when the power high-speed monitor 5 sends a normal feedback signal to the driving power supply 6 and wait for the next feedback signal until the current is increased to the set highest current, and when the power high-speed monitor 5 sends an alarm feedback signal, the driving power supply 6 immediately turns off the current output.
Further, the pump source 7 is constituted by a plurality of multimode semiconductor lasers, coupled into the main amplification stage 3 by means of a combiner.
Further, under the condition that the power high-speed monitor 5 monitors the output power of the light return end of the three-port isolator 2, the driving power supply 6 gradually increases the current to the pumping source 7, and the rising rate of the input current to the pumping source 7 is slowed down, so that the high-power overshoot generated by the relaxation oscillation effect of the pumping source 7 can be restrained, and the SBS effect of the main amplifying stage 3 of the high-power narrow-linewidth fiber laser is prevented from being generated in advance before the set power is reached.
Further, the optical filter in the power high-speed monitor 5 has higher transmittance to the backward Stokes light wavelength and lower transmittance to the pump light wavelength; the attenuation sheet is arranged on one side of the filter sheet and used for attenuating the backward Stokes light so that the power of the backward Stokes light is below the saturation threshold of the photoelectric detector.
Further, the photoelectric detector in the power high-speed monitor 5 receives the optical power output by the light return end of the three-port isolator 2, converts the optical power into a power data signal and sends the power data signal to the control circuit board; the control circuit board judges whether the received power data signal exceeds an alarm threshold value in real time.
Further, the position of the power high-speed monitor 5 for detecting the return optical fiber of the three-port isolator 2 may be set near the return optical fiber output port of the three-port isolator 2, or the inner cladding layer may be etched to the return optical fiber of the three-port isolator 2, set near the etched area.
Further, the driving power supply 6 comprises a constant current power supply module and a main control board; the constant current power supply module supplies power to the pumping source 7, and the main control board receives signals of the high-speed monitor 5 and controls the constant current power supply module to output current.
Further, the process of applying current to the pump source 7 by the driving power supply 6 is to increase the current when the power high-speed monitor 5 sends a normal feedback signal to the driving power supply 6 and wait for the next feedback signal until the current is increased to the set highest current, and when the power high-speed monitor 5 sends an alarm feedback signal, the driving power supply 6 immediately turns off the current output.
Further, the SBS suppression method of the high-power narrow-linewidth fiber laser is characterized in that the pump source 7 is formed by a plurality of multimode semiconductor lasers and is coupled into the amplifying stage 3 through a pump beam combiner.
Further, under the condition that the power high-speed monitor 5 monitors the output power of the light return end of the three-port isolator 2, the driving power supply 6 gradually increases the current of the semiconductor pumping source 7, and as the rising rate of the input current of the pumping source 7 is slowed down, the high-power overshoot generated by the relaxation oscillation effect of the pumping source 7 can be restrained, and the SBS effect of the main amplifying stage 3 of the high-power narrow-linewidth fiber laser is avoided before the set power is reached.
In the embodiment of the invention, the optical fiber laser with the working wavelength of 1064nm and the linewidth of 10GHz is used as the narrow linewidth laser seed source, the narrow linewidth laser seed source provides signal light required by laser amplification, the signal light passes through a three-port isolator 2 with the power of about 50W and passes through an amplifying stage 3, and the light-light conversion efficiency of the amplifying stage 3 is 80%; the detection position of the power high-speed monitor 5 is arranged at 1cm of the return fiber output port of the three-port isolator 2; the pump source 7 comprises 976nm multimode semiconductor lasers with 7 locking wavelengths and a pump beam combiner, the positive and negative electrodes of the pump source 7 are connected in series, the rated power of the pump source 7 is 600W, the rated current is 10A, the photoelectric conversion efficiency of the pump source 7 is 40%, and the number of the pump laser modules is 6; the drive power supply 6 supplies 3 pump sources 7 with a maximum electric power of 10000W and a maximum current of 40A, and the applied current is instantaneously raised by 0.1A every 5 ms. The output pump light is simultaneously injected into the amplifying stage 3 through the (6+1) x 1 beam combiner, and pumping pump energy is provided for the double-cladding gain optical fiber. The type of double-clad gain fiber used in this example is ytterbium-doped fiber, the core of which is circular, and the diameter of which is 25 μm; the shape of the inner cladding is octagonal, and the diameter of the inner cladding is 400 mu m; the double-cladding gain fiber has the use length of 12m, after the double-cladding gain fiber absorbs pumping light, the rare earth doped ion ytterbium can generate energy level transition to an upper energy level to form particle beam inversion, and under the action of signal light, the double-cladding gain fiber is continuously subjected to a laser radiation process to generate 'isotactic photons', so that the effect of amplifying the signal light is achieved, and the amplified signal light is output from an output port of an optical isolator. When the signal light power exceeds the stimulated Brillouin scattering threshold 2400W, the SBS effect is generated, the corresponding pump source 7 power is 3000W, the driving current is 8.5A, the relaxation oscillation overshoot peak value of the semiconductor pump source 7 is related to the current magnitude and the rising edge time, the pump source 7 relaxation oscillation process power caused by general step current is often more than 1.05 times of the set value, the SBS effect generated in advance due to the relaxation oscillation peak value of the semiconductor pump source 7 is restrained by the real-time monitoring and the stepwise gradual increasing current of the return light power, the laser can finally reach the optimal power output, the production cost is optimized, the return light power is monitored in real time in use, and the use safety of the laser is protected.
According to the invention, the reverse optical power generated by the SBS effect of the laser is monitored by the power high-speed monitor 5, a feedback signal is continuously applied to the driving power supply 6, and the driving power supply 6 can gradually and continuously increase the current in a safe range by utilizing the relation between the relaxation oscillation overshoot peak value of the semiconductor pumping source 7, the current and the rising edge time until the current is increased to the set highest current, so that the SBS effect excited in advance due to the relaxation oscillation of the semiconductor pumping source 7 is restrained, the power utilization rate of the laser is improved, the use safety of the laser is protected, and the method has the advantages of simple structure and high reliability, and can be widely applied to the field of high-power lasers.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (10)
1. The SBS suppression method for the high-power narrow-linewidth fiber laser is characterized by comprising the following steps of:
s100, after forward light output by a narrow linewidth seed source (1) passes through an input end of a three-port isolator (2), entering a main amplification stage (3) from an output port, enabling backward Stokes light generated by the main amplification stage (3) due to an SBS effect to pass through the output port of the three-port isolator (2) and output from an optical fiber of a light return end, monitoring light return power of the three-port isolator (2) of a high-power narrow linewidth optical fiber laser by using a power high-speed monitor (5), and when the light return power is within a set power value, sending a feedback signal to a driving power supply (6) by the power high-speed monitor (5);
s200, continuously increasing output current after the driving power supply (6) receives a feedback signal of the power high-speed monitor (5);
s300, the output power of the semiconductor pump source (7) is controlled to be improved through the driving power supply (6), so that the return light power of the high-power narrow-linewidth fiber laser is affected, when the return light power is within a set power value, the S100 is repeated, and when the return light power exceeds the set power value, the driving power supply (6) stops outputting current.
2. The method for suppressing the SBS of the high-power narrow-linewidth fiber laser according to claim 1, wherein the narrow-linewidth seed source (1) is a semiconductor laser or a fiber laser, the working wavelength of the narrow-linewidth seed source (1) is 1.0 μm, 1.5 μm or 2.0 μm, the linewidth is less than 100GHz, and the power is more than 20W.
3. The SBS suppression method according to claim 1, characterized in that the three-port isolator (2) has three optical fiber output ports, the operating wavelength of which is not more than 5nm away from the operating wavelength of the narrow linewidth seed source (1), and the tolerance power of the three-port isolator (2) is greater than the output power of the seed source (1), and is connected to the narrow linewidth seed source (1) and the main amplifying stage (3) in an optical fiber fusion mode.
4. The method for suppressing SBS of a high-power narrow linewidth optical fiber laser according to claim 1, wherein the main amplifying stage (3) includes a combiner of a double-clad gain fiber and an optical fiber, the double-clad gain fiber is one of an ytterbium-doped fiber, an erbium-ytterbium co-doped fiber, a thulium-doped fiber or a thulium-holmium co-doped fiber, the fiber core is circular, and the fiber core diameter is greater than 10 μm; the inner cladding of the optical fiber is one of hexagon, octagon, D-type and plum blossom type.
5. The SBS suppression method for high power narrow linewidth fiber lasers according to claim 4, wherein said inner cladding diameter is greater than 125 μm, and said fiber combiner in said main amplification stage (3) is an (n+1) ×1 combiner.
6. The SBS suppression method for a high-power narrow linewidth fiber laser according to claim 1, wherein the power high-speed monitor (5) includes a photodetector, a filter, an attenuation sheet and a control circuit board, the filter having a higher transmittance for backward Stokes wavelengths than for pump wavelengths; the attenuation sheet is arranged on one side of the filter sheet and used for attenuating the backward Stokes light, so that the power of the backward Stokes light is below the saturation threshold of the photoelectric detector.
7. The SBS suppression method according to claim 6, wherein the photodetector receives optical power output from a return light end of the three-port isolator (2), converts the optical power into a power data signal, and sends the power data signal to the control circuit board, and the control circuit board monitors whether the received power data signal exceeds an alarm threshold in real time.
8. The SBS suppression method according to claim 6, characterized in that the position of the return-end optical fiber of the three-port isolator (2) is set near the return-fiber output port of the three-port isolator (2), or the return-end optical fiber of the three-port isolator (2) is etched into an inner cladding, and the return-end optical fiber of the three-port isolator (2) is set near the etched region.
9. The method for suppressing the SBS of the high-power narrow-linewidth fiber laser according to claim 1, wherein the driving power supply (6) comprises a constant-current power supply module and a main control board, the constant-current power supply module supplies power to the pumping source (7), and the main control board receives signals of the high-speed monitor (5) and controls the constant-current power supply module to output current.
10. The SBS suppression method for a high power narrow linewidth fiber laser according to claim 7, characterized in that the driving power supply (6) applies current to the pump source (7) by: when the power high-speed monitor (5) sends a normal feedback signal to the driving power supply (6), current is increased, the next feedback signal is waited until the current is increased to the set highest current, and when the power high-speed monitor (5) sends an alarm feedback signal, the driving power supply (6) turns off current output.
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| CN202311836834.1A CN117728278A (en) | 2023-12-28 | 2023-12-28 | SBS (styrene butadiene styrene) inhibition method of high-power narrow-linewidth fiber laser |
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| CN202311836834.1A CN117728278A (en) | 2023-12-28 | 2023-12-28 | SBS (styrene butadiene styrene) inhibition method of high-power narrow-linewidth fiber laser |
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2023
- 2023-12-28 CN CN202311836834.1A patent/CN117728278A/en active Pending
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