CN112542760A - Optical fiber laser with adjustable beam quality and method for outputting adjustable laser - Google Patents

Optical fiber laser with adjustable beam quality and method for outputting adjustable laser Download PDF

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Publication number
CN112542760A
CN112542760A CN202011454658.1A CN202011454658A CN112542760A CN 112542760 A CN112542760 A CN 112542760A CN 202011454658 A CN202011454658 A CN 202011454658A CN 112542760 A CN112542760 A CN 112542760A
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China
Prior art keywords
laser
beam quality
control module
fiber
optical fiber
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CN202011454658.1A
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Inventor
陈明
张海洋
张怡静
刘兆和
杨雪敏
王冰雪
钱富琛
王建明
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Wuhan Raycus Fiber Laser Technologies Co Ltd
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Wuhan Raycus Fiber Laser Technologies Co Ltd
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Priority to CN202011454658.1A priority Critical patent/CN112542760A/en
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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
    • 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
    • H01S3/005—Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping
    • H01S3/0071—Beam steering, e.g. whereby a mirror outside the cavity is present to change the beam direction
    • 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
    • H01S3/005—Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping
    • H01S3/0085—Modulating the output, i.e. the laser beam is modulated outside the laser cavity
    • 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

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • Lasers (AREA)

Abstract

The invention provides a fiber laser with adjustable beam quality and a method for outputting adjustable laser, comprising the following steps: the device comprises a laser light source, an energy transmission optical fiber, a light beam quality control module driving source and a light beam quality control module; the beam quality control module includes: a mode scrambler and a pusher; the movable end at the impeller is installed to the mode scrambler, and laser light source and biography can optic fibre intercommunication, pass can optic fibre and install in the mode scrambler, light beam quality control module and impeller electric connection to according to light beam quality control module driving source adjustment impeller, make the impeller control mode scrambler extrude ability optic fibre. According to the fiber laser with the adjustable light beam quality, the light beam quality control module is driven to work by the light beam quality control module driving source, so that the pusher can control the mode scrambler to extrude the energy-transferring fiberAccording to different input parameters, the energy transmission optical fiber can generate bending deformation with different degrees to generate mode coupling effect, and further can output light beam quality M2A continuously tunable laser.

Description

Optical fiber laser with adjustable beam quality and method for outputting adjustable laser
Technical Field
The invention relates to the field of fiber lasers, in particular to a fiber laser with adjustable beam quality and a method for outputting adjustable laser.
Background
The fiber laser, as a laser using a doped fiber as a gain medium, has become a representative of a new generation of laser technology due to its advantages of high conversion efficiency, good beam quality, large tunable range, compact and flexible structure, and excellent stability.
The double-cladding fiber laser has the characteristics and advantages that the single-mode laser output close to the diffraction limit can be realized due to the unique waveguide structure, but the fiber core diameter of the fiber is still very small due to the limitation of the single-mode condition, and the problems of possible optical damage and nonlinear effect of the end face of the fiber under high power are solved by adopting the thick-core multi-module fiber laser output, but the quality of the output laser beam is reduced. In industrial applications, there are often different requirements on the beam quality of high power fiber laser systems.
Disclosure of Invention
The embodiment of the invention provides a fiber laser with adjustable beam quality and a method for outputting adjustable laser, which are used for solving the technical problem that the beam quality of a high-power single-mode laser and a multi-mode laser system is not changeable in processing application.
The embodiment of the invention provides a fiber laser with adjustable beam quality, which comprises:
the device comprises a laser light source, an energy transmission optical fiber, an output optical cable, a light beam quality control module driving source and a light beam quality control module; the beam quality control module includes: a mode scrambler and a pusher;
the module scrambler is installed at the movable end of the pusher, the laser light source is communicated with the energy transmission optical fiber, the energy transmission optical fiber is installed in the module scrambler, the light beam quality control module is electrically connected with the pusher to adjust the pusher according to a driving source of the light beam quality control module, so that the pusher controls the module scrambler to extrude the energy transmission optical fiber.
According to the invention, the beam quality adjustable fiber laser provided by the invention comprises the following components: the mould scrambler comprises a mould scrambler propulsion block, a mould scrambler fixing seat and a sleeve for loading the energy transmission optical fiber;
the mode scrambler fixing seat is used for fixing the energy transmission optical fiber, and the mode scrambler pushing block is positioned on one side of the mode scrambler fixing seat and movably arranged on the pusher; the sleeve is installed in the mode scrambler fixing seat.
According to the fiber laser with adjustable beam quality provided by the invention, the fiber laser with adjustable beam quality further comprises: an output optical cable; the output optical cable is communicated with the laser light source through the energy transmission optical fiber.
According to the fiber laser with adjustable beam quality provided by the invention, the laser light source is a single-mode fiber laser, and the fiber laser comprises: a cladding stripper and a first optical fiber module; the first optical fiber module is connected with the energy transmission optical fiber through the cladding light stripper.
According to the fiber laser with adjustable beam quality provided by the invention, the beam quality M of the single-mode fiber laser2The continuously adjustable range is 2 to 6.
According to the fiber laser with adjustable beam quality provided by the invention, the laser light source is a multimode fiber laser, and the fiber laser comprises: the beam combiner and the plurality of second optical fiber modules; and each second optical fiber module is connected with the energy transmission optical fiber through the beam combiner.
According to the fiber laser with adjustable beam quality provided by the invention, the beam quality of the multimode group fiber laserM2The continuously adjustable range is 6 to 12.
According to the fiber laser with adjustable beam quality provided by the invention, the fiber laser with adjustable beam quality further comprises: the laser control module and the industrial personal computer are used for inputting control signals;
laser instrument control module with light beam quality control module driving source with laser light source electric connection, the control end of industrial computer with laser instrument control module connects.
According to the fiber laser with adjustable beam quality provided by the invention, the fiber laser with adjustable beam quality further comprises: a laser drive power supply; the laser driving power supply is electrically connected with the laser control module, the laser light source and the light beam quality control module driving source at the same time.
The embodiment of the invention also provides a method for outputting adjustable laser by the fiber laser, which comprises the following steps:
the light beam quality control module driving source drives the light beam quality control module to work according to the acquired input parameters;
the pusher controls the mode scrambler to extrude the energy-transferring optical fiber; in the extrusion process, according to the difference of input parameters, the energy transmission optical fiber generates bending deformation with different degrees to generate mode coupling effect, and the quality M of the output light beam is realized2A continuously tunable laser.
According to the fiber laser with adjustable beam quality and the method for outputting adjustable laser, the beam quality control module is driven to work by the beam quality control module driving source, so that the pusher can control the mode scrambler to extrude the energy transmission fiber, the energy transmission fiber can be subjected to bending deformation with different degrees to generate mode coupling effect according to different input parameters, and the beam quality M can be output2A continuously tunable laser. The fiber laser breaks through the mode balance of laser transmission in the fiber, enhances the coupling effect between the modes, controls the transmission and exchange of energy, achieves the effect of continuously adjustable beam quality, and outputs ideal beam quality laser. In addition, the fiber laser can output the beam quality M of the laser light2And the energy distribution is adjustable and controllable, so that the application effect and the application field of the high-power optical fiber laser are effectively improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a fiber laser with adjustable beam quality provided by the present invention;
FIG. 2 is a schematic diagram of the fiber laser configuration in the case of a single mode fiber laser;
FIG. 3 is a schematic diagram of a fiber laser configuration in the case of a multimode fiber laser;
in the figure, 1, a laser light source; 11. a first fiber optic module; 12. a cladding light stripper; 13. a beam combiner; 14. a second fiber optic module; 2. a laser drive power supply; 3. a beam quality control module drive source; 4. a laser control module; 5. an output optical cable; 6. an industrial personal computer; 7. a light beam quality control module; 71. a pusher; 72. a mode scrambler fixing seat; 73. a mode scrambler propulsion block; 74. a sleeve.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The following describes, with reference to fig. 1, a beam quality tunable fiber laser provided by the present invention, which includes: laser light source1. An energy transmission optical fiber, a light beam quality control module driving source 3 and a light beam quality control module 7. The beam quality control module 7 includes: a mode scrambler and a pusher 71. The movable end at impeller 71 is installed to the mode scrambler, and laser light source 1 and biography can the optic fibre intercommunication, pass can the optic fibre and install in the mode scrambler, light beam quality control module 7 and impeller 71 electric connection to adjust impeller 71 according to light beam quality control module 7 driving source, thereby the steerable mode scrambler of impeller 71 realizes the extrusion to can the optic fibre, thereby biography can the optic fibre take place the mode coupling effect under the microbending state, final output light beam quality M2A continuously tunable laser.
In the working process of the optical fiber laser with adjustable light beam quality, a light beam quality control module driving source 3 drives a light beam quality control module 7 to work according to the acquired input parameters. The light beam quality control module 7 has a continuous adjusting function, the pusher 71 controls the mode scrambler, the mode scrambler connected with the pusher 71 controls the extrusion amount of the energy transmission optical fiber, and the precision is less than 0.01 mm. In the extrusion process, the energy transmission optical fiber generates bending deformation with different degrees to generate mode coupling effect according to different input parameters, and further the quality M of the output light beam can be realized2A continuously tunable laser.
Wherein, the fiber laser of adjustable beam quality still includes: an output optical cable 5. The output optical cable 5 is communicated with the laser light source 1 through an energy transmission optical fiber. Beam mass M2The continuously tunable laser light is transmitted to the target through the output optical cable 5.
According to the fiber laser with adjustable beam quality, the beam quality control module is driven to work by the beam quality control module driving source, so that the pusher can control the mode scrambler to extrude the energy transmission fiber, the energy transmission fiber can be subjected to bending deformation of different degrees to generate mode coupling effect according to different input parameters, and the beam quality M can be output2A continuously tunable laser.
As shown in fig. 1, the mode scrambler includes: a mode scrambler push block 73 and a mode scrambler fixing seat 72. The mode scrambler fixing seat 72 is used for fixing the energy transmission optical fiber, and the mode scrambler pushing block 73 is positioned on one side of the mode scrambler fixing seat 72, movably mounted on the pusher and used for extruding the energy transmission optical fiber.
To avoid damage to the energy transmitting fiber during extrusion, the mode scrambler may also be provided with a sleeve 74 for carrying the energy transmitting fiber. The sleeve 74 is installed in the mode scrambler fixing seat 72, the sleeve 74 is sleeved outside the energy transmission optical fiber, and the mode scrambler pushing block 73 extrudes the sleeve 74 to extrude the energy transmission optical fiber.
As shown in fig. 1, the fiber laser with adjustable beam quality further includes: a laser control module 4 and an industrial personal computer 6 for inputting control signals. Laser instrument control module 4 and light beam quality control module driving source 3 and laser light source 1 electric connection, the control end and the laser instrument control module 4 of industrial computer 6 are connected. The industrial personal computer 6 sends an instruction to the laser control module 4, and the light beam quality control module driving source 3 drives the light beam quality control module 7 to work according to the parameters input by the laser control module 4. The industrial personal computer 6 controls the parameter input of the whole optical fiber laser, changes the working state of the light beam quality control module 7, and controls the response time to be less than 10 ms.
The beam quality adjustable fiber laser further comprises: the laser driving power supply 2. The laser driving power supply 2 is used for supplying power to the laser light source 1 and each control structure, and the laser driving power supply 2 is electrically connected with the laser control module 4, the laser light source 1 and the light beam quality control module driving source 3.
If the laser light source 1 is a single-mode fiber laser, as shown in fig. 2, the laser light source 1 includes: a cladding stripper 12 and a first fiber module 11. The first fiber module 11 is used for continuously emitting laser signals. The beam quality control module 7 is located between the cladding stripper 12 and the output cable 5. The light beam quality control module driving source 3 drives the light beam quality control module 7 to work, the pusher 71 controls the mode scrambler to extrude the energy transmission optical fiber output by the single-mode fiber laser, when lasers with different output light beam qualities are needed, the energy transmission optical fiber generates bending deformation with different degrees to generate mode coupling effect by changing input instruction parameters, and the output light beam quality M is realized2A continuously tunable laser. In this embodiment, the beam quality M of the single mode fiber laser2The continuously adjustable range is 2 to 6.
If the laser light source 1 is a multimode fiber laser, as shown in fig. 3, the laser light source 1 includes: a combiner 13 and a plurality of second fiber modules 14. Each second fiber module 14 is connected with the energy-transmitting fiber through the beam combiner 13. Similarly, the second fiber module 14 is used for continuously emitting laser signals, and the laser signals are emitted through a plurality of second fiber modules 14. The beam quality control module 7 is located between the combiner 13 and the output cable 5. The beam quality control module driving source 3 drives the beam quality control module 7 to work, the pusher 71 controls the mode scrambler to extrude the energy transmission optical fiber output by the multimode fiber laser, when lasers with different output beam qualities are needed, the energy transmission optical fiber is subjected to bending deformation with different degrees to generate mode coupling effect by changing input instruction parameters, and the output beam quality M is realized2A continuously tunable laser. In this embodiment, the beam quality M of the multimode group fiber laser2The continuously adjustable range is 6 to 12.
According to the fiber laser with adjustable beam quality, the beam quality control module is driven to work by the beam quality control module driving source, so that the pusher can control the mode scrambler to extrude the energy transmission fiber, the energy transmission fiber can be subjected to bending deformation of different degrees to generate mode coupling effect according to different input parameters, and the beam quality M can be output2A continuously tunable laser. The fiber laser breaks through the mode balance of laser transmission in the fiber, enhances the coupling effect between the modes, controls the transmission and exchange of energy, achieves the effect of continuously adjustable beam quality, and outputs ideal beam quality laser. In addition, the fiber laser can output the beam quality M of the laser light2And the energy distribution is adjustable and controllable, so that the application effect and the application field of the high-power optical fiber laser are effectively improved.
The present invention also provides a method for outputting tunable laser by a fiber laser, which implements output tuning by controlling the fiber laser, as shown in fig. 1 to 3, the fiber laser includes: the device comprises a laser light source 1, an energy transmission optical fiber, a light beam quality control module driving source 3 and a light beam quality control module 7. The beam quality control module 7 includes: a mode scrambler and a pusher 71. Mode scramblerInstall the expansion end at impeller 71, laser source 1 and biography can the optic fibre intercommunication, pass can the optic fibre and install in the mode scrambler, light beam quality control module 7 and impeller 71 electric connection to adjust impeller 71 according to light beam quality control module 7 driving source, thereby the steerable mode scrambler of impeller 71 realizes the extrusion to can the optic fibre, thereby it takes place the mode coupling effect to pass can the optic fibre under the microbending state, final output light beam quality M2A continuously tunable laser.
The method mainly comprises the following steps:
step S1: the beam quality control module driving source 3 drives the beam quality control module 7 to operate according to the acquired input parameters.
Before the process that the beam quality control module driving source 3 acquires the input parameters, the industrial personal computer 6 sends an instruction to the laser control module 4, and the beam quality control module driving source 3 drives the beam quality control module 7 to work according to the parameters input by the laser control module 4.
Step S2: pusher 71 controls the mode scrambler to crush the energized fiber. In the extrusion process, according to the difference of input parameters, the energy transmission optical fiber generates bending deformation with different degrees to generate mode coupling effect, and the quality M of the output light beam is realized2A continuously tunable laser.
The method for outputting the adjustable laser by the fiber laser drives the beam quality control module to work through the beam quality control module driving source, so that the pusher can control the mode scrambler to extrude the energy-transmitting fiber, the energy-transmitting fiber can generate bending deformation with different degrees to generate mode coupling effect according to different input parameters, and further the beam quality M can be output2A continuously tunable laser. The method breaks through the mode balance of the transmitted laser in the optical fiber, enhances the coupling effect between the modes, controls the transmission and the exchange of energy, achieves the effect of continuously adjusting the beam quality, and outputs the laser with ideal beam quality.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (10)

1. A beam quality tunable fiber laser, comprising:
the device comprises a laser light source, an energy transmission optical fiber, a light beam quality control module driving source and a light beam quality control module; the beam quality control module includes: a mode scrambler and a pusher;
the module scrambler is installed at the movable end of the pusher, the laser light source is communicated with the energy transmission optical fiber, the energy transmission optical fiber is installed in the module scrambler, the light beam quality control module is electrically connected with the pusher to adjust the pusher according to a driving source of the light beam quality control module, so that the pusher controls the module scrambler to extrude the energy transmission optical fiber.
2. The beam-quality tunable fiber laser of claim 1, wherein the mode scrambler comprises: the mould scrambler comprises a mould scrambler propulsion block, a mould scrambler fixing seat and a sleeve for loading the energy transmission optical fiber;
the mode scrambler fixing seat is used for fixing the energy transmission optical fiber, and the mode scrambler pushing block is positioned on one side of the mode scrambler fixing seat and movably arranged on the pusher; the sleeve is installed in the mode scrambler fixing seat.
3. The beam-quality tunable fiber laser of claim 1, further comprising: an output optical cable; the output optical cable is communicated with the laser light source through the energy transmission optical fiber.
4. The fiber laser of claim 1, wherein the laser light source is a single mode fiber laser comprising: a cladding stripper and a first optical fiber module; the first optical fiber module is connected with the energy transmission optical fiber through the cladding light stripper.
5. The fiber laser of claim 4, wherein the single mode fiber laser has a beam mass M2The continuously adjustable range is 2 to 6.
6. The tunable beam quality fiber laser of claim 1, wherein the laser source is a multimode fiber laser comprising: the beam combiner and the plurality of second optical fiber modules; and each second optical fiber module is connected with the energy transmission optical fiber through the beam combiner.
7. The fiber laser of claim 6, wherein the multimode group fiber laser beam mass M is2The continuously adjustable range is 6 to 12.
8. The beam-quality tunable fiber laser of claim 1, further comprising: the laser control module and the industrial personal computer are used for inputting control signals;
laser instrument control module with light beam quality control module driving source with laser light source electric connection, the control end of industrial computer with laser instrument control module connects.
9. The beam-quality tunable fiber laser of claim 8, further comprising: a laser drive power supply; the laser driving power supply is electrically connected with the laser control module, the laser light source and the light beam quality control module driving source at the same time.
10. A method of outputting tunable laser light using the beam quality tunable fiber laser according to any one of claims 1 to 9, the method comprising the steps of:
the light beam quality control module driving source drives the light beam quality control module to work according to the acquired input parameters;
the pusher controls the mode scrambler to extrude the energy-transferring optical fiber; in the extrusion process, according to the difference of input parameters, the energy transmission optical fiber generates bending deformation with different degrees to generate mode coupling effect, and the quality M of the output light beam is realized2A continuously tunable laser.
CN202011454658.1A 2020-12-10 2020-12-10 Optical fiber laser with adjustable beam quality and method for outputting adjustable laser Pending CN112542760A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113305450A (en) * 2021-06-09 2021-08-27 广东宏石激光技术股份有限公司 Laser processing device with adjustable processing quality and processing method thereof
WO2023098221A1 (en) * 2021-12-03 2023-06-08 武汉锐科光纤激光技术股份有限公司 Light beam generation method, apparatus, and device, storage medium, and electronic device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113305450A (en) * 2021-06-09 2021-08-27 广东宏石激光技术股份有限公司 Laser processing device with adjustable processing quality and processing method thereof
WO2023098221A1 (en) * 2021-12-03 2023-06-08 武汉锐科光纤激光技术股份有限公司 Light beam generation method, apparatus, and device, storage medium, and electronic device

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