CN113654692A - Laser power detector based on double-surface temperature measurement - Google Patents
Laser power detector based on double-surface temperature measurement Download PDFInfo
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- CN113654692A CN113654692A CN202110921700.4A CN202110921700A CN113654692A CN 113654692 A CN113654692 A CN 113654692A CN 202110921700 A CN202110921700 A CN 202110921700A CN 113654692 A CN113654692 A CN 113654692A
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- 238000009529 body temperature measurement Methods 0.000 title claims abstract description 16
- 238000010521 absorption reaction Methods 0.000 claims abstract description 56
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims abstract description 5
- 230000017525 heat dissipation Effects 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 abstract description 9
- 230000002093 peripheral effect Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 238000002310 reflectometry Methods 0.000 description 4
- 244000126211 Hericium coralloides Species 0.000 description 3
- 239000006096 absorbing agent Substances 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000012994 industrial processing Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K17/00—Measuring quantity of heat
- G01K17/003—Measuring quantity of heat for measuring the power of light beams, e.g. laser beams
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- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- General Physics & Mathematics (AREA)
- Lasers (AREA)
Abstract
The invention discloses a laser power detector based on double-surface temperature measurement, which adopts a plurality of flow deflectors and carries out temperature measurement based on a double-surface temperature measurement mode. The device comprises a reflecting cone, an absorption cavity, a flow deflector, a radiating fin, a temperature sensor, a shell and the like. The reflecting cone is arranged at the bottom of the absorption cavity, and the cone tip is opposite to the direction of the laser incident port. The inner side wall of the absorption cavity is of a V-shaped annular groove structure. The outer side wall of the absorption cavity is in close contact with the inner walls of the flow deflectors, two circular grooves are formed in two surfaces of each flow deflector, and temperature sensors are mounted in the grooves and can measure the temperature of the hot end and the temperature of the cold end of each flow deflector. The radiating fins are arranged between the adjacent guide vanes, the guide vanes and the radiating fins are coaxially assembled, and the guide vanes and the peripheral parts of the radiating fins are arranged in a flowing water environment so as to improve the radiating efficiency. The shell is provided with holes for water inlet and outlet, so that water cooling is realized. The laser power detector can improve the accuracy and stability of power measurement, improve the laser damage threshold value and reduce the damage risk of the detector.
Description
Technical Field
The invention belongs to the technical field of laser radiation parameter measurement, relates to a laser power measuring device, and particularly relates to a high-power laser power detector.
Background
With the rapid development of laser technology, the output power of the laser is continuously improved, for example, in the fastest developing fiber laser in recent years, the output power of a single module reaches more than ten thousand watts, and the output power of multimode laser breaks through 100 kW. Industrial processing equipment based on high-power laser is widely applied, and further the laser technology is promoted to be developed more quickly. With the increase of the laser power level, corresponding laser power measuring equipment needs to be equipped for performance monitoring and evaluation. The conventional high-power laser power meter generally adopts a calorimetric method to measure the laser power, but cannot meet the measurement requirements of the conventional high-power laser in the aspects of measurement accuracy and laser damage resistance. On one hand, most of the existing laser power meters realize the measurement of laser power by measuring the temperature of a certain surface of the absorber, the temperature value obtained by the temperature measurement mode has larger difference with the actual temperature change of the absorber, the temperature drift is easy to occur, and the temperature measurement error is larger. In addition, the existing laser power meter has low beam expanding ratio to incident laser, and the laser power density on an absorption surface is not uniformly distributed, so that the laser damage resistance is poor, and the probability of damage by laser in the measuring process is very high.
Therefore, it is very necessary to develop a new laser power detector to improve the measurement accuracy and laser damage resistance thereof, so as to better meet the measurement requirement of the current high-power laser.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the novel laser power detector is high in measurement accuracy, stable in performance and high in laser damage threshold.
The technical scheme of the invention is as follows:
a laser power detector based on double-surface temperature measurement adopts a plurality of heat flow conducting pieces (flow deflectors for short) and carries out temperature measurement based on a double-surface temperature measurement mode. The laser power detector comprises a reflecting cone, an absorption cavity, a flow deflector, a radiating fin, a temperature sensor, a shell and the like. The reflecting cone is arranged in the absorption cavity, the flow deflectors are arranged on the side wall outside the absorption cavity, and two groups of temperature sensors are respectively arranged on the front surface and the rear surface of each flow deflector. And the cooling fins are arranged between the adjacent flow deflectors. The reflecting cone, the absorption cavity, the flow deflector, the radiating fin and the temperature sensor are arranged in the shell.
Specifically, the reflection cone is installed at the bottom of the absorption cavity, and the cone tip is opposite to the direction of a laser incident port of the laser power detector and used for reflecting incident laser to the inner wall of the absorption cavity. The side surface of the reflection cone is plated with a high-reflectivity film layer so as to improve the reflectivity of the laser to be detected and reduce the absorption of the laser.
The inner wall of the absorption cavity comprises a series of V-shaped annular groove structures, and the V-shaped annular groove structures are used for absorbing the light beams reflected to the inner wall of the absorption cavity from the reflection cone and converting the light beams into heat energy. The V-shaped annular groove has the effects of increasing the light absorption area and reducing the laser power density, so that the laser damage resistance of the laser power meter is improved. The absorption rate of the inner wall of the absorption cavity is improved through a surface treatment process, and the uniform absorption of laser is realized. The reflecting cone is arranged inside one end of the absorption cavity.
The guide vane is used for measuring the internal temperature through a temperature sensor arranged on the guide vane. During heat flow conduction, the flow deflector absorbs heat from the absorption cavity and conducts the heat to the temperature sensor. Two annular grooves are respectively processed on the front surface and the rear surface of the flow deflector, wherein the annular groove close to one side of the absorption cavity is a hot end, and the annular groove far away from one side of the absorption cavity is a cold end. A plurality of temperature sensors are arranged in each annular groove, so that the temperature difference between the hot end and the cold end is measured. The method for measuring the temperature difference of the laser power detector through the front surface and the rear surface of the flow deflector is a double-surface temperature measurement method. The laser power detector may comprise a plurality of said guide vanes. All temperature sensors in the grooves which are close to the absorption cavity on all the flow guide plates are connected in series to form a group and used for measuring the temperature of the hot end; all temperature sensors far away from the absorption cavity are connected in series to form a group and used for measuring the temperature of the cold end. And according to the temperature difference between the hot end and the cold end, the power of the laser to be detected can be obtained through further calculation and analysis. The middle part of the flow deflector is a cylindrical hole, and the inner wall of the hole is tightly attached to the cylindrical outer wall of the absorption cavity so as to reduce thermal resistance. The peripheral part of the flow deflector is processed into a comb-tooth shape to increase the heat dissipation area. In order to improve the temperature measurement accuracy, the number of the guide vanes may be two or more.
The flow deflector, the cooling fin and the absorption cavity are coaxially assembled. The heat sink is not in direct contact with the absorption cavity.
The flow deflector and the surrounding part of the radiating fin are arranged in a flowing water environment to improve the radiating efficiency.
The housing may comprise a front housing and a rear housing, the front housing having an opening in a central region thereof as a laser light incident port. The rear shell is provided with a hole which is used as a threading hole of an electric cable or is used for installing an electric interface. The lateral wall of shell still sets up water inlet and delivery port for realize the water-cooling heat dissipation.
The positions of the flow deflector, the radiating fins and the shell which are contacted with each other are grooved and provided with sealing rubber rings, so that sealing and water proofing are realized.
Compared with the prior art, the invention has the advantages that:
1. the invention adopts a plurality of flow deflectors to measure the temperature, and two groups of temperature sensors are arranged on the front surface and the rear surface of each flow deflector, thereby realizing the real-time temperature measurement of the absorber by the double-surface temperature measurement principle. Due to the fact that distribution of heat flow is uneven, compared with a conventional method of measuring the temperature of a single surface only, the method of measuring the temperature of the double surfaces of the plurality of flow deflectors is higher in measuring accuracy and more stable in performance.
2. The invention adopts the absorption cavity with the V-shaped circular groove structure to expand and absorb the laser, thereby obviously reducing the laser power density and improving the laser damage resistance of the detector.
Drawings
FIG. 1 is a schematic diagram of a laser power detector according to an embodiment of the present invention;
FIG. 2 is an internal block diagram of a laser power detector according to an embodiment of the present invention;
fig. 3 is a first schematic view of a flow deflector according to an embodiment of the present invention;
fig. 4 is a schematic structural view of a flow deflector according to an embodiment of the present invention.
Detailed Description
The invention will be described in detail below with reference to an embodiment in the drawings.
Referring to fig. 1 and 2, a laser power detector based on dual-surface temperature measurement according to this embodiment includes: the device comprises a reflecting cone 1, an absorption cavity 2, a flow deflector 3, a radiating fin 4, a shell 5, a water inlet 10, a water outlet 11 and the like.
The embodiment adopts the reflection absorption measurement principle to measure the laser power, namely, the incident laser irradiates the reflection cone 1 through the incident port 6 of the laser power detector, is reflected to the inner wall of the absorption cavity 2 through the reflection cone 1, is reflected and absorbed for multiple times through the V-shaped groove on the inner wall of the absorption cavity 2, converts the laser energy into heat energy, and is conducted to the flow deflector 3. A plurality of temperature sensors are distributed on the flow deflector 3, and can measure the temperature change on the flow deflector 3. When the temperature reaches the balance, the laser power can be calculated according to the measured temperature difference.
The reflection cone 1 in this embodiment is made of pure copper, the side surface is conical, and the surface is plated with gold to improve the reflectivity of the laser to be measured.
The absorption cavity 2 is made of pure copper, the shape is cylindrical, the inner wall is processed into a series of V-shaped annular grooves 21, the opening angle of the V-shaped annular grooves 21 is 30-50 degrees, and the V-shaped annular grooves 21 control the reflectivity within the range of 50-90% through a surface treatment process.
The laser power detector comprises 3 flow deflectors 3. The flow deflector 3 is tightly attached to the outer wall of the absorption cavity 2, and the flow deflector and the absorption cavity can be assembled in an interference fit mode, so that the flow deflector and the absorption cavity are tightly contacted, and the thermal resistance is reduced; the high-heat-conductivity material can be filled for assembly, so that the thermal resistance can be reduced, and the response speed can be improved. The baffle 3 is made of pure copper material, and 2 annular grooves are respectively formed on the front and back surfaces of the baffle, as shown in fig. 3 and 4, wherein 801 and 802 are respectively a hot end and a cold end on the front surface of the baffle, and 803 and 804 are respectively a hot end and a cold end on the back surface of the baffle. And a temperature sensor is arranged in the annular groove. The temperature sensor is pasted and fixed through high-temperature-resistant heat-conducting glue. By the double-surface temperature measuring mode, the temperatures of the guide vanes close to the hot end and the cold end in the heat conduction process can be measured respectively, and the laser power to be measured is calculated according to the temperature difference between the hot end and the cold end. The peripheral part of the flow deflector 3 is processed into a comb-tooth shape to increase the heat dissipation area.
The laser power detector comprises 2 radiating fins 4, and the radiating fins 4 are made of copper or aluminum materials. The heat sink 4 is in close contact with the heat conducting fin 3, and is not in direct contact with the absorption cavity 2. The peripheral portion of the heat radiating fin 4 is processed into a comb-tooth shape to increase the heat radiating area.
The laser power detector also comprises a shell 5 which can be processed by aluminum alloy and comprises a front shell 51 and a rear shell 52. The front housing 51 is opened at the center thereof as a laser light incident port 6. The middle of the rear shell is provided with a hole which is used as a threading hole 7 and is used for threading out a lead of the temperature sensor, and the temperature sensor is connected with an instrument which is responsible for control and display through a wiring terminal and can also be connected with a computer system. The front shell 51 and the rear shell 52 are respectively provided with a groove 9 for installing a sealing ring, so that cooling water is prevented from entering the interior of the laser power detector or leaking from the joint of the shells.
The working process of the laser power detector is as follows:
and aligning an incident port 6 of the laser power detector to laser to be detected, irradiating the laser on the reflecting cone 1 through the incident port 6, and reflecting the laser to the inner wall of the absorption cavity 2 through the reflecting cone 1. The inner wall V-shaped circular groove 21 of the absorption cavity 2 reflects and absorbs laser for multiple times, so that laser energy can be absorbed by the inner wall of the absorption cavity 2 more uniformly, and local power density is reduced. After the inner wall of the absorption cavity 2 absorbs the laser energy, the laser energy is converted into heat, and the heat is conducted to the flow deflector 3 along the radial direction of the absorption cavity 2 and is continuously conducted along the radial direction of the flow deflector 3. During the heat flow conduction, the temperature of the flow deflector 3 changes, and the temperature signal is collected by a plurality of temperature sensors on the flow deflector 3 and transmitted to an external instrument or a computer system which is connected with the temperature sensor and is responsible for control and display. And when the temperature reaches balance, obtaining the laser power value to be measured through further calculation processing according to the measured temperature difference.
In this embodiment, the water inlet 10 may be connected to external cooling water, and after entering the inside of the detector, the cooling water flows through the flow deflector 3 and the heat sink 4, takes away heat generated by the flow deflector and is discharged through the water outlet 11.
The above-described embodiments are merely illustrative of the embodiments of the present invention, and do not limit the spirit and scope of the present invention. Various modifications and improvements of the technical solution of the present invention, which may be made by a person skilled in the art without departing from the design concept of the present invention, are intended to fall within the scope of the present invention, which is defined by the appended claims rather than the above description, and all changes which fall within the meaning and range of equivalency of the claims are therefore intended to be embraced therein and any reference signs in the claims are not to be construed as limiting the claims concerned.
Claims (7)
1. A laser power detector based on double-surface temperature measurement is characterized by comprising a reflecting cone, an absorption cavity, a flow deflector, a radiating fin, a temperature sensor and a shell; the reflection cone is arranged in the absorption cavity, the side wall of the outer part of the absorption cavity is provided with a plurality of flow deflectors, two annular grooves are respectively formed in two surfaces of each flow deflector, the annular groove close to one side of the absorption cavity is a hot end, the annular groove far away from one side of the absorption cavity is a cold end, and a plurality of temperature sensors are arranged in each annular groove; all temperature sensors in the grooves which are close to the absorption cavity on all the flow guide plates are connected in series to form a group and used for measuring the temperature of the hot end; all temperature sensors far away from the absorption cavity are connected in series to form a group and used for measuring the temperature of the cold end; the radiating fins are arranged between the flow deflectors; the inner wall of the absorption cavity comprises a V-shaped annular groove structure and is used for absorbing the light beam reflected to the inner wall of the absorption cavity from the reflection cone; the reflecting cone, the absorption cavity, the flow deflector, the radiating fin and the temperature sensor are arranged in the shell.
2. The laser power detector according to claim 1, wherein the reflecting cone is installed at a bottom position of the absorption cavity, and a cone tip is opposite to a laser entrance port direction of the laser power detector, and is used for reflecting the incident laser to an inner wall of the absorption cavity.
3. The laser power detector as claimed in claim 1, wherein the outer wall of the absorption cavity is closely attached to the inner wall of the flow deflector.
4. The laser power detector of claim 1, wherein said baffle, said heat sink and said absorption cavity are coaxially assembled; the heat sink is not in direct contact with the absorption cavity.
5. The laser power detector as claimed in claim 1, wherein the flow deflector and the surrounding portion of the heat sink are disposed in a flowing water environment to improve heat dissipation efficiency.
6. The laser power detector according to claim 1, wherein the housing comprises a front housing and a rear housing, the front housing having a central region opened as a laser entrance port; the rear shell is provided with a hole which is used as a threading hole of an electric cable or is used for installing an electric interface; the lateral wall of shell still sets up water inlet and delivery port for realize the water-cooling heat dissipation.
7. The laser power detector as claimed in claim 1, wherein the contact position of the flow deflector, the heat sink and the housing is grooved and provided with a sealing rubber ring to realize water tightness.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110921700.4A CN113654692B (en) | 2021-08-12 | 2021-08-12 | Laser power detector based on double-surface temperature measurement |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110921700.4A CN113654692B (en) | 2021-08-12 | 2021-08-12 | Laser power detector based on double-surface temperature measurement |
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| CN113654692A true CN113654692A (en) | 2021-11-16 |
| CN113654692B CN113654692B (en) | 2023-09-29 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116625553A (en) * | 2023-07-19 | 2023-08-22 | 中国工程物理研究院应用电子学研究所 | Water absorption type full-absorption high-energy laser power energy measuring device and method |
| CN117871052A (en) * | 2024-01-15 | 2024-04-12 | 吉林省科英医疗激光有限责任公司 | Device and method for rapidly measuring laser output power in real time |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0180974A1 (en) * | 1984-11-06 | 1986-05-14 | Walter Bürkle | Method and device for sensing flow velocities and/or fluxes |
| US4864098A (en) * | 1988-05-19 | 1989-09-05 | Rofin-Sinar, Inc. | High powered beam dump |
| US20050018178A1 (en) * | 2003-06-18 | 2005-01-27 | James Schloss | Laser power meter |
| JP2010261908A (en) * | 2009-05-11 | 2010-11-18 | Geomatec Co Ltd | Laser power sensor |
| CN103389157A (en) * | 2013-07-26 | 2013-11-13 | 西北核技术研究所 | High-energy laser beam expanding and absorbing device |
| CN103398785A (en) * | 2013-07-26 | 2013-11-20 | 西北核技术研究所 | Rotary absorber-based high-energy laser energy measuring device |
| CN105181128A (en) * | 2015-10-12 | 2015-12-23 | 中国工程物理研究院应用电子学研究所 | High-energy laser total-absorption energy measuring device |
| CN210625848U (en) * | 2019-09-29 | 2020-05-26 | 吉林省栅莱特激光科技有限公司 | Small-sized integrated portable 1060nm laser power meter |
-
2021
- 2021-08-12 CN CN202110921700.4A patent/CN113654692B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0180974A1 (en) * | 1984-11-06 | 1986-05-14 | Walter Bürkle | Method and device for sensing flow velocities and/or fluxes |
| US4864098A (en) * | 1988-05-19 | 1989-09-05 | Rofin-Sinar, Inc. | High powered beam dump |
| US20050018178A1 (en) * | 2003-06-18 | 2005-01-27 | James Schloss | Laser power meter |
| JP2010261908A (en) * | 2009-05-11 | 2010-11-18 | Geomatec Co Ltd | Laser power sensor |
| CN103389157A (en) * | 2013-07-26 | 2013-11-13 | 西北核技术研究所 | High-energy laser beam expanding and absorbing device |
| CN103398785A (en) * | 2013-07-26 | 2013-11-20 | 西北核技术研究所 | Rotary absorber-based high-energy laser energy measuring device |
| CN105181128A (en) * | 2015-10-12 | 2015-12-23 | 中国工程物理研究院应用电子学研究所 | High-energy laser total-absorption energy measuring device |
| CN210625848U (en) * | 2019-09-29 | 2020-05-26 | 吉林省栅莱特激光科技有限公司 | Small-sized integrated portable 1060nm laser power meter |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116625553A (en) * | 2023-07-19 | 2023-08-22 | 中国工程物理研究院应用电子学研究所 | Water absorption type full-absorption high-energy laser power energy measuring device and method |
| CN116625553B (en) * | 2023-07-19 | 2023-09-29 | 中国工程物理研究院应用电子学研究所 | Water absorption type full-absorption high-energy laser power energy measuring device and method |
| CN117871052A (en) * | 2024-01-15 | 2024-04-12 | 吉林省科英医疗激光有限责任公司 | Device and method for rapidly measuring laser output power in real time |
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