CN213602173U - Water cooling device of ytterbium-doped fiber laser - Google Patents
Water cooling device of ytterbium-doped fiber laser Download PDFInfo
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- CN213602173U CN213602173U CN202022798132.7U CN202022798132U CN213602173U CN 213602173 U CN213602173 U CN 213602173U CN 202022798132 U CN202022798132 U CN 202022798132U CN 213602173 U CN213602173 U CN 213602173U
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Abstract
The utility model discloses a mix ytterbium fiber laser water cooling plant belongs to fiber laser technical field, contains pump source water-cooling board and mixes ytterbium optic fibre water-cooling board and set up at pump source water-cooling board and mix the thermal-insulated intermediate layer in the middle of the ytterbium optic fibre water-cooling board. The utility model discloses an it compares with pump source, the water cooling plant of ytterbium fiber laser water cooling plant, can give the pump source respectively and mix ytterbium fiber and set up best water cooling condition to improve light-light conversion efficiency, the unstable threshold value of mode and reduce the risk of laser burnout.
Description
Technical Field
The utility model belongs to the technical field of the fiber laser, concretely relates to mix ytterbium fiber laser water cooling plant.
Background
Fiber lasers are widely used in industrial manufacturing, beam combining and many other applications due to their advantages of high conversion efficiency, excellent beam quality, easy thermal management and reliable stability.
The fiber laser comprises three elements of a pumping source, a resonant cavity and a working medium (ytterbium-doped fiber). In practical experiments and engineering, most of the adopted pumping sources are semiconductor diodes with the wavelength of about 976nm, and the general wavelength is 970-980 nm. For a wavelength-unlocked semiconductor diode, the center wavelength of its laser light shifts with the temperature of the diode. Typically, the temperature of a semiconductor diode rises by 1 ℃, with a 0.3nm red shift in its center wavelength. However, the pump absorption for ytterbium-doped fiber has a maximum at a wavelength of 976nm, and thus the pump source temperature will affect the pump absorption for the ytterbium-doped fiber. The low absorption not only reduces the light-to-light conversion efficiency of the laser, but also the unabsorbed pump light can cause damage to other components in the optical path.
When the laser power exceeds a threshold, a Transverse Mode Instability (TMI) phenomenon occurs. The generation of transverse mode instability leads to the sharp reduction of the beam quality, thereby limiting the further increase of the laser power. By controlling the temperature of the pump source, the main peak of the wavelength shifts to 976nm, so that the absorption of the pump light of the optical fiber can be weakened, the heat source of the unit length of the optical fiber is reduced, and the unstable threshold of the transverse mode of the high-power optical fiber laser is improved.
In addition, despite the large surface area to volume ratio of the fiber laser, in the current high power laser operation, the thermal damage of the double-clad fiber coating layer is still one of the main limiting factors of the high power fiber laser, and directly influences the improvement and further development of the output power of the fiber laser. Heat dissipation in ytterbium-doped fibers and other optical devices has become an important consideration.
In summary, the temperature of the pump source directly affects the efficiency of the laser, the stability of other components in the optical path, and the unstable threshold of the transverse mode of the high-power laser. In addition, the temperature of ytterbium-doped fibers will affect their long-term reliability. However, the pump source and the ytterbium-doped optical fiber share one water cooling plate at present, and the water cooling temperature cannot reach the optimal temperature required by each. The utility model relates to a mix ytterbium fiber laser water cooling plant can set up required temperature to the pump source and mix ytterbium optic fibre respectively to the laser instrument of different power, improves laser instrument efficiency, the unstable threshold value of transverse mode and reduce the risk of burning out of laser instrument optical device.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: an object of the utility model is to provide a mix ytterbium fiber laser water cooling plant improves the unstable threshold value of transverse mode and reduces the laser instrument and burns out the risk.
The technical scheme is as follows: in order to realize the purpose of the utility model, the utility model adopts the following technical scheme:
a water cooling device of an ytterbium-doped fiber laser comprises a pump source water cooling plate, a ytterbium-doped fiber water cooling plate and a heat insulation interlayer arranged between the pump source water cooling plate and the ytterbium-doped fiber water cooling plate.
Furthermore, the pump source water cooling plate uses a single water cooler for water supply, the water flow is controlled to be 5-20L/min, and the water temperature is 15-30 ℃.
Furthermore, the ytterbium-doped optical fiber water cooling plate uses a single water cooler for water supply, the water flow is set to be 10-25L/min, and the water temperature is 10-25 ℃.
Further, the thickness of the heat insulation sandwich layer is 1-15 mm.
Furthermore, the pump source water cooling plate and the ytterbium-doped optical fiber water cooling plate are respectively provided with a U-shaped water channel, and the U-shaped water channel comprises a water inlet pipeline and a water outlet pipeline.
Furthermore, the U-shaped water channel in the pump source water cooling plate is a pump source water cooling plate pipeline which is of a sleeved double-U-shaped structure.
Furthermore, the U-shaped water channel in the ytterbium-doped optical fiber water cooling plate is a ytterbium-doped optical fiber water cooling plate pipeline which is of a double-U-shaped structure arranged side by side.
And curable heat-conducting glue is filled between the pump source water cooling plate and the U-shaped water channel and between the ytterbium-doped optical fiber water cooling plate and the U-shaped water channel.
Furthermore, a thermocouple embedding groove of the pump source water cooling plate is reserved in the pump source water cooling plate; and a thermocouple embedding groove of the ytterbium-doped fiber water-cooling plate is reserved in the ytterbium-doped fiber water-cooling plate 5.
Furthermore, the reserved positions of the thermocouple embedding grooves of the pump source water cooling plate are 6-12 positions and are uniformly distributed at the pump source installation position; the reserved positions of the thermocouple embedding grooves of the ytterbium-doped optical fiber water-cooling plate are 3-9 positions, and the thermocouple embedding grooves are uniformly distributed below the installation position of the ytterbium-doped optical fiber disc.
Has the advantages that: compared with the prior art, the utility model discloses a mix this water cooling plant of ytterbium fiber laser water cooling plant can give the pump source respectively and mix ytterbium fiber setting best water cooling condition with the pump source, mix a water cooling board of ytterbium fiber sharing to improve light-light conversion efficiency, the unstable threshold value of mode and reduce the laser instrument and burn out the risk.
Drawings
FIG. 1 is a diagram of a pump source water-cooling plate;
FIG. 2 is a schematic diagram of a water cooling plate with ytterbium doped fiber;
FIG. 3 is a cross-sectional view of a pump source water-cooling plate, an ytterbium-doped fiber water-cooling plate, and a heat-insulating plate;
reference numerals: 1-pump source water cooling plate, 2-pump source water cooling plate pipeline, 3-pump source installation position, 4-pump source water cooling plate thermocouple embedding groove, 5-ytterbium-doped optical fiber water cooling plate, 6-ytterbium-doped optical fiber water cooling plate pipeline, 7-ytterbium-doped optical fiber disc installation position, 8-ytterbium-doped optical fiber water cooling plate thermocouple embedding groove and 9-heat insulation interlayer.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to 3, a water cooling apparatus for an ytterbium-doped fiber laser includes a pump source water cooling plate 1, a ytterbium-doped fiber water cooling plate 5, and a thermal insulating interlayer 9 disposed between the pump source water cooling plate 1 and the ytterbium-doped fiber water cooling plate 5.
Pump source water-cooling board 1 adopts the design of U-shaped water route, and has both contained pump source water-cooling board pipeline 2 below a single row of pump source, also contains outlet conduit including the inlet channel, and pump source water-cooling board 1 relevant position reserves pump source water-cooling board thermocouple and inlays groove 4.
The ytterbium-doped optical fiber water cooling plate 5 is designed by adopting a U-shaped water channel, two water inlet pipelines are arranged below the ytterbium-doped optical fiber, and a thermocouple embedding groove 8 of the ytterbium-doped optical fiber water cooling plate is reserved in the corresponding position of the ytterbium-doped optical fiber water cooling plate 5.
Controlling the water flow of a water cooling machine connected with the pump source water cooling plate 1 to be 5-20L/min and controlling the water temperature to be 15-30 ℃; the water flow rate of a water cooling machine connected with the ytterbium-doped optical fiber water cooling plate 5 is set to be 10-25L/min, and the water temperature is set to be 10-25 ℃.
The pump source water cooling plate 1 and the ytterbium-doped optical fiber water cooling plate 5 are made of aluminum or aluminum alloy, and the heat insulation interlayer 9 is made of various organic or inorganic heat insulation materials, such as a polyurethane foam plate, foam rubber, an asbestos plate and the like.
The thickness of the heat insulation interlayer 9 is 1-15 mm.
The pipeline materials of the pump source water cooling plate pipeline 2 and the ytterbium-doped optical fiber water cooling plate pipeline 6 are pure copper.
Curable heat-conducting glue, such as heat-conducting RTV glue, organic heat-conducting silica gel and the like, is filled between the pump source water cooling plate 1 and the pump source water cooling plate pipeline 2, and between the ytterbium-doped optical fiber water cooling plate 5 and the ytterbium-doped optical fiber water cooling plate pipeline 6.
The reserved positions of the pump source water-cooling plate thermocouple embedding grooves 4 are 6-12 positions, and the pump source water-cooling plate thermocouple embedding grooves are evenly distributed at the pump source installation positions 3.
The reserved positions of the ytterbium-doped fiber water-cooling plate thermocouple embedding grooves 8 are 3-9 positions, and the reserved positions are uniformly distributed below the ytterbium-doped fiber disc installation positions 7.
The pump source water cooling plate 1 uses a single water cooling machine for supplying water, the water flow is controlled to be 5-20L/min, and the water temperature is 15-30 ℃.
The ytterbium-doped optical fiber water cooling plate 5 uses a single water cooling machine for water supply, the water flow is set to be 10-25L/min, and the water temperature is 10-25 ℃.
The pump source water cooling plate pipeline 2 is of a sleeved double-U-shaped structure. The ytterbium-doped optical fiber water cooling plate pipeline 6 is of a double-U-shaped structure arranged side by side.
Aiming at lasers with different powers, the water cooling device comprises the following use methods:
for low power lasers (2000w and below):
1) setting the temperature and the flow of the pump source water cooling plate 1;
2) setting the temperature and the flow of the ytterbium-doped optical fiber water cooling plate 5;
3) and (3) turning on the laser, emitting light to rated power, and adjusting the water temperature and water flow of the pump source water cooling plate 1 to enable the power of the laser to reach the maximum value.
For high power lasers (3000w and above):
1) setting the temperature and the flow of the pump source water cooling plate 1;
2) setting the temperature and the flow of the ytterbium-doped optical fiber water cooling plate 5;
3) and (3) turning on the laser, emitting light to rated power, and adjusting the water temperature and water flow of the pump source water cooling plate 1 to improve the unstable threshold of the transverse mode of the laser to the maximum value.
Compared with a water cooling plate shared by a pump source and the ytterbium-doped optical fiber, the water cooling device can respectively set the optimal water cooling conditions for the pump source and the ytterbium-doped optical fiber, thereby improving the light-light conversion efficiency, reducing the mode unstable threshold and reducing the risk of burning out the laser.
Example 1
A water cooling device of an ytterbium-doped fiber laser comprises: the water cooling device comprises a pump source water cooling plate 1, an ytterbium-doped optical fiber water cooling plate 5 and a heat insulation interlayer 9 between the two water coolers; the pump source water cooling plate 1 and the ytterbium-doped optical fiber water cooling plate 5 adopt a U-shaped water channel design, and a plurality of pump source water cooling plate thermocouple embedding grooves 4 and ytterbium-doped optical fiber water cooling plate thermocouple embedding grooves 8 are reserved. For low power laser (2000w and below), such as 1500w laser, the temperature and flow rate of cooling water of pump source water cooling plate 1 are set to be 28 deg.C and 12L/min, and the temperature and flow rate of cooling water of ytterbium doped fiber water cooling plate 5 are set to be 20 deg.C and 15L/min. Compared with the prior art that a water cooling plate is shared (the water temperature is 25 ℃, and the flow is 12L/min), the light-light conversion efficiency of the laser is increased by 3 percent, the power of the whole machine is improved by about 45W, and the temperature of the ytterbium-doped optical fiber is reduced by 5 ℃, so that the stability and the energy conversion efficiency of the laser are greatly improved.
Example 2
The present embodiment is substantially the same as embodiment 1, except that the corresponding laser model of the present embodiment is 1000w, and the water temperature and flow rate of the cooling water of the pump source water-cooling plate 1 are 26 ℃ and 15L/min.
Example 3
The embodiment is basically the same as the embodiment 1, except that the corresponding laser model of the embodiment is 2000w, and the water temperature and the flow rate of the cooling water of the pump source water cooling plate 1 are 28 ℃ and 12L/min; the water temperature and the flow rate of cooling water of the ytterbium-doped optical fiber water cooling plate 5 are 18 ℃ and 18L/min.
Example 4
For high power laser (3000w and below), such as 3000w laser, the cooling water temperature and flow rate of pump source water cooling plate 1 are set to 20 deg.C and 15L/min, and the cooling water temperature and flow rate of ytterbium doped fiber water cooling plate 5 are set to 18 deg.C and 18L/min. Compared with the prior art that a water cooling plate is shared (the water temperature is 25 ℃, and the flow is 15L/min), the instability threshold of the transverse mode of the laser is increased by 120w, the temperature of the ytterbium-doped optical fiber is reduced by 7 ℃, and the operating power and the long-term reliability of the laser are greatly improved.
Example 5
The present embodiment is substantially the same as embodiment 1, except that the laser power in the present embodiment is 4000w, the water temperature and flow rate of the cooling water of the pump source water cooling plate 1 are 18 ℃ and 20L/min, and the water temperature and flow rate of the cooling water of the ytterbium doped fiber water cooling plate 5 are 16 ℃ and 20L/min.
Claims (10)
1. The utility model provides a doping ytterbium fiber laser water cooling plant which characterized in that: comprises a pump source water cooling plate (1), an ytterbium-doped optical fiber water cooling plate (5) and a heat insulation interlayer (9) arranged between the pump source water cooling plate (1) and the ytterbium-doped optical fiber water cooling plate (5).
2. The ytterbium-doped fiber laser water cooling device of claim 1, wherein: the pump source water cooling plate (1) supplies water by using a single water cooler, the water flow is controlled to be 5-20L/min, and the water temperature is 15-30 ℃.
3. The ytterbium-doped fiber laser water cooling device of claim 1, wherein: the ytterbium-doped optical fiber water cooling plate (5) is supplied with water by using a single water cooler, the water flow is set to be 10-25L/min, and the water temperature is 10-25 ℃.
4. The ytterbium-doped fiber laser water cooling device of claim 1, wherein: the thickness of the heat insulation interlayer (9) is 1-15 mm.
5. The ytterbium-doped fiber laser water cooling device of claim 1, wherein: the pump source water cooling plate (1) and the ytterbium-doped optical fiber water cooling plate (5) are respectively provided with a U-shaped water channel, and the U-shaped water channel comprises a water inlet pipeline and a water outlet pipeline.
6. The ytterbium-doped fiber laser water cooling device of claim 5, wherein: the pump source water cooling plate is characterized in that a U-shaped water channel in the pump source water cooling plate (1) is a pump source water cooling plate pipeline (2), and the pump source water cooling plate pipeline (2) is of a sleeved double-U-shaped structure.
7. The ytterbium-doped fiber laser water cooling device of claim 5, wherein: the U-shaped water channel in the ytterbium-doped optical fiber water cooling plate (5) is a ytterbium-doped optical fiber water cooling plate pipeline (6), and the ytterbium-doped optical fiber water cooling plate pipeline (6) is of a double-U-shaped structure arranged side by side.
8. The ytterbium-doped fiber laser water cooling device of claim 5, wherein: curable heat-conducting glue is filled between the pump source water-cooling plate (1) and the U-shaped water channel and between the ytterbium-doped optical fiber water-cooling plate (5) and the U-shaped water channel.
9. The ytterbium-doped fiber laser water cooling device of claim 1, wherein: a pump source water cooling plate thermocouple embedding groove (4) is reserved in the pump source water cooling plate (1); and a thermocouple embedding groove (8) of the ytterbium-doped optical fiber water-cooling plate is reserved in the ytterbium-doped optical fiber water-cooling plate (5).
10. The ytterbium-doped fiber laser water cooling device of claim 9, wherein: the reserved positions of the pump source water cooling plate thermocouple embedding grooves (4) are 6-12 positions and are uniformly distributed at the pump source installation positions (3); the reserved positions of the ytterbium-doped optical fiber water-cooling plate thermocouple embedding grooves (8) are 3-9 positions, and the reserved positions are uniformly distributed below the installation positions (7) of the ytterbium-doped optical fiber discs.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022798132.7U CN213602173U (en) | 2020-11-27 | 2020-11-27 | Water cooling device of ytterbium-doped fiber laser |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022798132.7U CN213602173U (en) | 2020-11-27 | 2020-11-27 | Water cooling device of ytterbium-doped fiber laser |
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| CN213602173U true CN213602173U (en) | 2021-07-02 |
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