CN109038184B - Temperature-modulatable optical fiber water-cooling disc and optical fiber laser - Google Patents
Temperature-modulatable optical fiber water-cooling disc and optical fiber laser Download PDFInfo
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- CN109038184B CN109038184B CN201811161982.7A CN201811161982A CN109038184B CN 109038184 B CN109038184 B CN 109038184B CN 201811161982 A CN201811161982 A CN 201811161982A CN 109038184 B CN109038184 B CN 109038184B
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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
- H01S3/02—Constructional details
- H01S3/04—Arrangements for thermal management
- H01S3/0407—Liquid cooling, e.g. by water
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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
- H01S3/02—Constructional details
- H01S3/04—Arrangements for thermal management
- H01S3/042—Arrangements for thermal management for solid state 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
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
- H01S3/06716—Fibre compositions or doping with active elements
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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
- H01S3/0675—Resonators including a grating structure, e.g. distributed Bragg reflectors [DBR] or distributed feedback [DFB] fibre lasers
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- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Lasers (AREA)
Abstract
The invention provides a temperature-modulated optical fiber water-cooling disc and an optical fiber laser, which comprise a substrate, wherein a plurality of isolation grooves radially extending to the side part of the substrate are arranged in the center of the substrate, a temperature modulation area is formed between every two adjacent isolation grooves, a water-cooling pipe is arranged in each temperature modulation area, and the side part of each temperature modulation area is provided with a water inlet and a water outlet which are communicated with the two ends of the corresponding water-cooling pipe. The front surface of the substrate is provided with the plurality of isolation grooves distributed in a radial mode, so that the substrate is divided into the plurality of temperature modulation areas, the water cooling pipes in each temperature modulation area are connected with the water cooling machines with different temperatures, when the optical fiber is coiled on the substrate in different coiling modes, the periodic modulation and the gradient modulation of the optical fiber temperature can be realized, meanwhile, the modulation of the optical fiber temperature can be realized by a single substrate, and the system structure of the optical fiber laser in the temperature modulation process of the optical fiber is simplified. The invention is applied to the field of optical fiber temperature modulation.
Description
Technical Field
The invention relates to a water-cooling disc and a fiber laser, in particular to a temperature-modulated fiber water-cooling disc and a fiber laser.
Background
Research shows that the temperature modulation of the fiber temperature of the fiber laser can achieve the effects of inhibiting mode instability and inhibiting nonlinear effects. The method for realizing the temperature modulation of the optical fiber in the optical fiber laser only uses a plurality of water-cooling discs to respectively modulate the temperature of each part of the optical fiber, so that the system of the optical fiber laser becomes complicated, and the suspended part between the water-cooling plates of the optical fiber can not well control the temperature of the optical fiber of the part, thereby being not beneficial to the stability and the safety of the high-power optical fiber laser.
Disclosure of Invention
Aiming at the problem that a plurality of water-cooling discs are used for modulating the temperature of an optical fiber in the prior art, so that a system of the optical fiber laser becomes complicated, the invention aims to provide the optical fiber water-cooling disc capable of modulating the temperature, wherein a plurality of temperature modulation areas are separated from one water-cooling disc, so that the system structure of the optical fiber laser can be simplified in the temperature modulation process of the optical fiber, and the periodic modulation and the gradient modulation of the temperature of the optical fiber can be realized at the same time. And then, a fiber laser structure based on a temperature modulation fiber water-cooling disc is provided to modulate the temperature of the gain fiber, so that the effects of inhibiting the nonlinear effect and the mode instability are achieved.
In order to achieve the purpose, the invention provides a temperature-modulated optical fiber water-cooling disc, which adopts the technical scheme that:
the utility model provides a but optic fibre water-cooling disc of temperature modulation, includes the base plate, the inside of central point on the base plate puts is equipped with a plurality of radial isolation grooves to the base plate lateral part extension, and the base plate between every two adjacent isolation grooves forms a temperature modulation district, is equipped with the water-cooling pipe in each temperature modulation district, and the lateral part in each temperature modulation district is equipped with and corresponds water-cooling pipe both ends water inlet and the delivery port of intercommunication.
As a further improvement of the technical scheme, each temperature modulation area on one surface of the substrate is provided with a first optical fiber groove, each first optical fiber groove is spirally coiled, and the first optical fiber grooves are sequentially communicated so that the optical fibers can be continuously coiled in the first optical fiber grooves.
As a further improvement of the above technical solution, a second optical fiber groove is provided on the other surface of the substrate, the second optical fiber groove is spirally wound, and each turn of the spiral on the second optical fiber groove passes through each temperature modulation region.
As a further improvement of the above technical solution, the number of the isolation grooves is four.
As a further improvement of the technical scheme, the ratio of the depth of the isolation groove to the thickness of the substrate is 7: 10-9: 10.
In order to achieve the above object, the present invention further provides a fiber laser, which adopts the following technical scheme:
a fiber laser comprises the temperature-modulated fiber water-cooling disc, and an LD pumping source, a fiber combiner, a fiber high-reflection grating, a gain fiber and a low-reflection grating which are sequentially connected through the fiber, wherein the gain fiber is arranged on the temperature-modulated fiber water-cooling disc.
As a further improvement of the above technical solution, the gain fiber is an ytterbium-doped fiber.
The invention has the beneficial technical effects that:
according to the invention, the substrate is divided into the temperature modulation areas by arranging the plurality of radially distributed isolation grooves in the center of the substrate, the water cooling pipes in each temperature modulation area are connected with the water cooling machines with different temperatures, so that the temperatures of the temperature modulation areas are different, the isolation grooves can effectively prevent the influence of different temperatures among the different temperature modulation areas, when the optical fiber is coiled on the substrate in different coiling modes, the periodic modulation and the gradient modulation of the optical fiber temperature can be realized, meanwhile, the modulation of the optical fiber temperature can be realized by using a single substrate, the system structure of the optical fiber laser in the temperature modulation process of the optical fiber is effectively simplified, the mode instability and the nonlinear effect can be better inhibited, and the high-power high-beam quality output can be better realized.
Drawings
FIG. 1 is a schematic diagram of a fiber optic water-cooled disc configuration;
FIG. 2 is a horizontal cross-sectional view of a fiber optic water-cooled tray;
FIG. 3 is a schematic view of the structure of one side of an optical fiber attached to a substrate;
FIG. 4 is a schematic view of the structure of an optical fiber attached to the other side of the substrate;
FIG. 5 is a schematic diagram showing the results of a first set of fiber optic water-cooled pan validation experiments;
FIG. 6 is a diagram showing the results of a second group of fiber optic water-cooling disk verification experiments
Fig. 7 is a schematic structural diagram of a fiber laser.
Detailed Description
In order to facilitate the practice of the invention, further description is provided below with reference to specific examples.
The temperature-modulated optical fiber water-cooling disc shown in fig. 1-2 comprises a substrate 1, wherein the substrate 1 is made of a metal material with good heat conductivity, a plurality of isolation grooves 2 radially extending towards the side part of the substrate are arranged in the center of the substrate 1, a temperature modulation area 3 is formed on the substrate 1 between every two adjacent isolation grooves 2, a coiled water-cooling pipe 33 is arranged in each temperature modulation area 3, a water inlet 31 and a water outlet 32 communicated with the two ends of the corresponding water-cooling pipe are arranged on the side part of each temperature modulation area 3, and each water-cooling pipe is uniformly distributed in the corresponding temperature modulation area 3, so that the uniformity of the single temperature modulation area 3 on the temperature is maintained. In this implementation, the number of the isolation grooves 2 is four, and the four isolation grooves form a cross structure to divide the substrate 1 into four temperature modulation regions.
This embodiment is equipped with a plurality of isolation tanks 2 that are radial distribution through the inside at base plate 1, make base plate 1 separated into a plurality of temperature modulation district 3, the water-cooled generator that the water-cooled tube in every temperature modulation district 3 connects the temperature difference, thereby make the temperature difference of each temperature modulation district 3, isolation tank 2 can effectually prevent the influence of the different temperatures between the different temperature modulation district 3, coil periodic modulation and the gradient modulation that can realize the optic fibre temperature when optic fibre coils on base plate 1 with the mode of coiling of difference, the modulation of optic fibre temperature has been realized promptly to a single base plate 1 simultaneously, the effectual system architecture who simplifies the temperature modulation in-process fiber laser of optic fibre.
In the embodiment, two coiling modes are adopted for the optical fiber on the substrate 1, the first coiling mode is shown in fig. 3, the optical fiber 4 is divided into four parts which are respectively coiled on four temperature modulation regions 3 on one surface of the substrate, and the optical fibers 4 of two adjacent temperature modulation regions 3 are connected, so that the gradient modulation of the temperature of the optical fiber 4 can be realized by the coiling mode, and meanwhile, no optical fiber 4 is in a suspended state in the temperature modulation process is ensured; the second winding method is shown in fig. 4, the optical fiber 4 is wound on the other side of the substrate 1 in a complete spiral structure, and the optical fiber 4 circulates through different temperature modulation regions 3, so that the periodic modulation of the temperature of the optical fiber 4 can be realized, and meanwhile, no optical fiber 4 is in a suspended state in the temperature modulation process is ensured.
Further preferably, referring to fig. 3, each temperature modulation region 3 on one surface of the substrate 1 is provided with a first optical fiber groove, each first optical fiber groove is spirally wound in a shape of "mosquito coil" and is communicated sequentially through a connection groove, so that the optical fiber 4 can be continuously wound in each first optical fiber groove, the first optical fiber groove fixes the optical fiber in the process of gradient modulation of the optical fiber temperature by the optical fiber, and the optical fiber is embedded into the first optical fiber groove to effectively improve the heat exchange efficiency between the optical fiber and the temperature modulation region 3.
Further preferably, referring to fig. 4, a second optical fiber groove is disposed on the other surface of the substrate 1, the second optical fiber groove is spirally wound in a shape of a mosquito coil, and the second optical fiber groove circularly passes through the temperature modulation regions 3 in sequence, that is, each circle of the second optical fiber groove in the spiral structure passes through each temperature modulation region, the second optical fiber groove fixes the optical fiber during the periodic modulation process of the optical fiber temperature, and the optical fiber 4 is embedded into the second optical fiber groove to effectively improve the heat exchange efficiency between the optical fiber and the temperature modulation regions 3.
The fiber optic water-cooling disc in this embodiment was verified by specific experimental operations as follows:
experiment one
Referring to fig. 4, after the optical fiber is wound in the second optical fiber groove, heat-conductive silicone grease is coated between the optical fiber and the optical fiber water-cooling disc to enhance the heat conduction between the optical fiber and the optical fiber water-cooling disc; the water cooling tubes in the temperature modulation regions at the upper right corner are filled with water at 20 ℃, the water cooling tubes in the temperature modulation regions at the lower left corner are filled with water at 35 ℃, the water cooling tubes in the other two temperature modulation regions are not filled with water to modulate the temperature of the optical fiber 4, the temperature of the optical fiber core is measured after the temperature of the optical fiber 4 is stable, and the measurement result is shown in fig. 5, so that the periodic modulation of the temperature of the optical fiber core by the optical fiber water cooling disc in the embodiment is effectively verified.
Experiment two
In addition, 20 ℃ of water is introduced into the water cooling tubes in the temperature modulation regions of the upper left corner region and the upper right corner region, 35 ℃ of water is introduced into the water cooling tubes in the temperature modulation regions of the lower left corner region and the lower right corner region to modulate the temperature of the optical fiber 4, the temperature of the fiber core is measured after the temperature of the optical fiber 4 is stabilized, and the measurement result is shown in fig. 6.
More preferably, the ratio of the depth of the isolation groove 2 to the thickness of the substrate 1 is 7: 10 to 9: 10.
As shown in fig. 7, the fiber laser includes the above temperature-modulated fiber water-cooled disc, and three LD pump sources 51, a fiber combiner 52, a fiber high-reflective grating 53, a gain fiber 54 and a low-reflective grating 55 connected in sequence by fiber, where the number of the LD pump sources 51 is three, and the LD pump sources are used to generate laser, the gain fiber 54 is disposed on a substrate 1 on the temperature-modulated fiber water-cooled disc, and is wound in a first fiber groove or a second fiber groove of the substrate, and the gain fiber is an ytterbium-doped fiber.
The foregoing description of the preferred embodiments of the present invention has been included to describe the features of the invention in detail, and is not intended to limit the inventive concepts to the particular forms of the embodiments described, as other modifications and variations within the spirit of the inventive concepts will be protected by this patent. The subject matter of the present disclosure is defined by the claims, not by the detailed description of the embodiments.
Claims (3)
1. An optical fiber water-cooling disc capable of being modulated in temperature is characterized by comprising a substrate, wherein a plurality of isolation grooves radially extending to the side part of the substrate are arranged in the center of the substrate, a temperature modulation area is formed between every two adjacent isolation grooves, a water-cooling pipe is arranged in each temperature modulation area, and a water inlet and a water outlet communicated with the two ends of the corresponding water-cooling pipe are arranged on the side part of each temperature modulation area;
the number of the isolation grooves is four, and the ratio of the depth of each isolation groove to the thickness of the substrate is 7: 10-9: 10;
each temperature modulation area on one surface of the substrate is provided with a first optical fiber groove, each first optical fiber groove is spirally coiled, and the first optical fiber grooves are sequentially communicated so that optical fibers can be continuously coiled in the first optical fiber grooves;
a second optical fiber groove is formed in the other surface of the substrate and is spirally wound, and each circle of the spiral on the second optical fiber groove passes through each temperature modulation area;
the water cooling pipes in each temperature modulation area are connected with water cooling machines with different temperatures, so that the temperatures of the temperature modulation areas are different, the isolation grooves can effectively prevent the influence of different temperatures among the temperature modulation areas, and when the optical fiber is coiled on the substrate in different coiling modes, the periodic modulation and the gradient modulation of the temperature of the optical fiber can be realized;
there are two winding ways of the optical fiber on the substrate:
the first winding mode is as follows: the optical fiber is divided into four parts which are respectively coiled on four temperature modulation areas on one surface of the substrate, the optical fibers of two adjacent temperature modulation areas are connected, and the coiling mode can realize the gradient modulation of the optical fiber temperature;
the second winding mode is as follows: the optical fiber is coiled on the other surface of the substrate in a complete spiral structure, and the optical fiber circulates through different temperature modulation regions, so that the periodic modulation of the temperature of the optical fiber can be realized.
2. A fiber laser, comprising the temperature-tunable fiber water-cooled disc of claim 1, and an LD pump source, a fiber combiner, a fiber high grating, a gain fiber and a low reflective grating connected in sequence via a fiber, wherein the gain fiber is disposed on the temperature-tunable fiber water-cooled disc.
3. The fiber laser of claim 2, wherein the gain fiber is an ytterbium-doped fiber.
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| CN201811161982.7A CN109038184B (en) | 2018-09-30 | 2018-09-30 | Temperature-modulatable optical fiber water-cooling disc and optical fiber laser |
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| CN201811161982.7A CN109038184B (en) | 2018-09-30 | 2018-09-30 | Temperature-modulatable optical fiber water-cooling disc and optical fiber laser |
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| CN109950781A (en) * | 2019-04-25 | 2019-06-28 | 哈尔滨工业大学 | 1940nm thulium-doped all-fiber laser device and medical device based on the laser |
| CN110829158B (en) * | 2019-11-18 | 2024-07-30 | 中国人民解放军国防科技大学 | High-power fiber laser modularized thermal management device with temperature distribution capable of being modulated in time and space |
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| JP4540773B2 (en) * | 1999-10-19 | 2010-09-08 | 浜松ホトニクス株式会社 | Optical fiber laser device and optical amplification device |
| CN204067842U (en) * | 2014-02-12 | 2014-12-31 | 华南理工大学 | A kind of continuously adjustable single frequency optical fiber laser |
| CN107093834B (en) * | 2017-05-27 | 2018-10-19 | 深圳市创鑫激光股份有限公司 | A kind of optical fiber laser and its liquid cooling plate |
| CN107123921A (en) * | 2017-06-23 | 2017-09-01 | 南京理工大学 | A kind of high-power fiber raster resonator efficiency test platform |
| CN107153241A (en) * | 2017-06-30 | 2017-09-12 | 华中科技大学鄂州工业技术研究院 | A kind of high efficiency modular optical fiber cooling device |
| CN107658682B (en) * | 2017-10-16 | 2019-11-01 | 长春理工大学 | A kind of cooling device and laser of thin-sheet laser gain media |
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