CN107332100B - Water-cooled easy-to-disassemble and-wash laser output head with output light path and light output power detection function - Google Patents
Water-cooled easy-to-disassemble and-wash laser output head with output light path and light output power detection function Download PDFInfo
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- CN107332100B CN107332100B CN201710677616.6A CN201710677616A CN107332100B CN 107332100 B CN107332100 B CN 107332100B CN 201710677616 A CN201710677616 A CN 201710677616A CN 107332100 B CN107332100 B CN 107332100B
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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
- H01S3/06704—Housings; Packages
Abstract
The invention discloses a water-cooled high-power optical fiber laser output head with output light path and light output power detection function, which comprises a metal inner sleeve, wherein a mode stripping unit, a beam expanding unit and an optical fiber are arranged in the metal inner sleeve; the metal outer sleeve is sleeved on the outer surface of the metal inner sleeve, and the inner surface of the metal outer sleeve and the cooling water diversion groove on the outer surface of the metal inner sleeve form a cooling water passage; a detachable bolt of the photosensitive thermosensitive sensor is arranged in the metal inner sleeve, and the detachable bolt is inserted into the second end of the metal inner sleeve; the optical fiber is connected with the beam expanding unit through the optical path and sequentially passes through the mode stripping unit and the detachable bolt. The laser output head is divided into an inner metal sleeve and an outer metal sleeve, the important and fragile transmission optical fibers, the beam expanding unit and the mode stripping unit are packaged in the metal inner sleeve of the output head, and when a cooling pipeline is blocked, the laser output head can be conveniently detached and cleaned without worrying about the damage of an inner optical unit.
Description
Technical Field
The invention relates to the technical field of fiber lasers, in particular to a water-cooled easy-to-disassemble and-wash laser output head with an output light path and an output light power detection function.
Background
The fiber laser has the advantages of higher energy conversion efficiency, better stability, longer service life and the like, and is widely applied to the scientific research and industrial fields in recent years. The need for these applications has led to an ever increasing output power of fiber lasers. For high-power optical fiber devices, since the power density of the output end face of the transmission optical fiber is very high, any minor defect and pollution can lead to the damage of the optical fiber, the transmission optical fiber of the high-power optical fiber laser device cannot be directly connected with the collimating and focusing unit, and the tail end of the transmission optical fiber cannot be connected with the output head with the beam expanding function (EP 0619508).
In order to improve the quality of output light spots, the current main stream output head is internally provided with a mode stripper for stripping residual pump light and other high-order modes in the cladding. The cladding light stripping process is accompanied by heat generation, such as untimely removal, and accumulated heat can lead to fiber damage. In order to reliably remove this heat, the prior art (EP 0910810) has directed cooling water to the output head to flush the inner wall of the output head, where the fibers are in direct contact with the cooling water without any isolation. This approach can effectively carry away heat but has the very significant disadvantage that fluctuations in the water flow can cause the fiber to shake, affecting the stability of the output spot and in extreme cases the water flow can break the fiber. In addition, if the water quality is not clean, contaminants can be deposited on the surface of the optical fiber, and the temperature of the optical fiber can be locally too high during demolding. For these problems, the subsequent method is to isolate the cooling water from the optical fiber, isolate the optical fiber from the cooling water by transparent medium (CN 205353412U), absorb cladding light by the external metal pipe wall through the transparent medium to generate heat, and then take away the heat by the cooling water.
When the light path is broken or damaged, the light energy absorption rate of the fault point is increased drastically, so that the fault point of the optical fiber is destroyed, and then the whole optical fiber is destroyed (or forms a plurality of cavities) from the fault point to the direction of the pump source just like a fire-guiding cable with one end ignited. The output head of the fiber laser is used as the laser beam output end, and a light path detection device is added at the position to be used as a safety measure before the laser is started, so that the problems can be effectively prevented.
The invention comprises the following steps:
the invention aims to solve the technical problem of providing a water-cooled high-power fiber laser output head with light path and light output power detection functions aiming at the defects of the prior art.
The technical scheme of the invention is as follows:
a water-cooled high-power fiber laser output head with output light path and output light power detection function, it includes:
a metal inner sleeve, in which a mode stripping unit, a beam expanding unit and an optical fiber are arranged;
the metal outer sleeve is sleeved on the outer surface of the metal inner sleeve, and the inner surface of the metal outer sleeve and the cooling water diversion groove on the outer surface of the metal inner sleeve form a cooling water passage;
a detachable plug with a photosensitive heat-sensitive sensor arranged inside, wherein the detachable plug is inserted into the second end of the metal inner sleeve;
the optical fiber is connected with the beam expanding unit through an optical path and sequentially passes through the mode stripping unit and the detachable bolt.
In a preferred embodiment of the present invention, the present invention further comprises a tail pipe, one end of the tail pipe is connected to the metal outer sleeve, the tail pipe is used for locking the metal inner sleeve and the metal outer sleeve together and closing a cooling water passage between the metal outer sleeve and the metal inner sleeve, and the other end of the tail pipe is connected to an armored output optical fiber, and the armored output optical fiber is connected to an optical fiber passing through the tail pipe through an optical path.
In a preferred embodiment of the invention, the metal outer sleeve is provided with a water inlet terminal and a water outlet terminal, and cooling water enters a cooling water passage between the metal outer sleeve and the metal inner sleeve through the water inlet terminal and flows out from the water outlet terminal.
In a preferred embodiment of the invention, the metal inner sleeve is made of aluminum or copper with high thermal conductivity.
In a preferred embodiment of the invention, the metal outer sleeve is made of stainless steel material.
In a preferred embodiment of the present invention, the metal inner sleeve is divided into a beam expanding unit mounting section, an optical fiber fusion splicing section, a mode stripping unit mounting section, and a detachable plug pin insertion section, the beam expanding unit being mounted in the beam expanding unit mounting section, the mode stripping unit being mounted in the mode stripping unit mounting section, and the detachable plug pin being inserted in the detachable plug pin insertion section.
In a preferred embodiment of the present invention, the inner surface of the beam expanding unit mounting section of the metal inner sleeve is coated with a coating film having a high reflection effect on the near infrared light band.
In a preferred embodiment of the present invention, the inner surface of the mode stripper unit mounting section of the metal inner sleeve is roughened and then coated with a high temperature resistant absorbent layer.
In a preferred embodiment of the invention, a plurality of parallel turn-back cooling water diversion grooves are arranged on the outer surface of the metal inner sleeve, inlets of the plurality of parallel turn-back cooling water diversion grooves are communicated with the water inlet terminal, and outlets of the plurality of parallel turn-back cooling water diversion grooves are communicated with the water outlet terminal.
In a preferred embodiment of the invention, a circular ring with a diversion trench is arranged on the metal outer sleeve close to the water inlet and outlet terminals, so that possible water leakage is prevented from flowing into the collimation focusing unit directly along the laser output head.
In a preferred implementation of the present invention, the metal outer sleeve has a cylindrical section matched with the optical fiber fusion section, the mode stripping unit mounting section and the detachable bolt inserting section of the metal inner sleeve and an inclined section matched with the beam expanding unit mounting section of the metal inner sleeve, and a sealing ring groove is arranged at the transition between the inner surface of the cylindrical section and the inner surface of the inclined section of the metal outer sleeve; a rubber sealing ring is arranged at the transition part of the outer surface of the installation section of the beam expanding unit of the metal inner sleeve and the outer surface of the optical fiber welding section, and at least two rubber sealing rings are arranged on the outer surface of the detachable bolt insertion section of the metal inner sleeve; after the metal inner sleeve is inserted into the metal outer sleeve and locked by the tail pipe, the rubber sealing rings at the transition part of the outer surface of the beam expanding unit installation section of the metal inner sleeve and the outer surface of the optical fiber welding section are propped against the sealing ring grooves, and the outer surface of the detachable bolt insertion section of the metal inner sleeve is respectively sealed with the metal outer sleeve and the tail pipe by at least two rubber sealing rings.
A metal ring with a transparent rubber ring is sleeved at the end part of the inclined part of the metal outer sleeve and the end part of the beam expanding unit mounting section of the metal inner sleeve, and the transparent rubber ring can be tightly attached to the end part of the inclined part of the metal outer sleeve and the end part of the beam expanding unit mounting section of the metal inner sleeve when the metal ring is screwed; acting as a secondary barrier to prevent possible water leakage.
In a preferred embodiment of the invention, the transparent rubber ring can transmit light waves with the wavelength of 1000-1100 nm, and can avoid being heated by possible reflected light irradiation.
In a preferred embodiment of the present invention, the detachable plug includes a plug body, a reflection cap, a temperature sensor and a photosensitive sensor, the plug body is divided into a half cylinder and a full cylinder which are connected to each other, the reflection cap is mounted on the end of the half cylinder, a sensor mounting cavity is formed in the half cylinder, and an optical fiber hole and a sensor cable channel are formed in the half cylinder and the full cylinder, the optical fiber hole is communicated with the inner hole of the reflection cap, and the sensor cable channel is communicated with the sensor mounting cavity; the temperature sensor and the photosensitive sensor are installed in the sensor installation cavity, a sensor cable connected with the temperature sensor and the photosensitive sensor passes through the sensor cable channel, and the optical fiber passes through the optical fiber hole and the inner hole of the reflecting cap.
In a preferred embodiment of the invention, the outer surface of the reflective cap is at an angle of 45 ° to the optical fiber.
In a preferred embodiment of the invention, the outer surface of the reflective cap is coated with a highly reflective coating.
As the technical scheme is adopted, compared with the prior art, the laser output head is divided into the inner metal sleeve and the outer metal sleeve, the important and fragile transmission optical fiber, the beam expanding unit and the mode stripping unit are packaged in the metal inner sleeve of the output head, and when a cooling pipeline is blocked, the laser output head can be conveniently detached and cleaned without worrying about the damage of an internal optical unit. The inner surface of the mode stripping unit in the metal inner sleeve is roughened, so that the absorption of cladding light by the inner sleeve is enhanced. The laser output head can not only detect the laser output power, but also detect the light path by receiving the modulated red light signal emitted by the laser before the high-energy laser is output, and plays a role in preventing the internal light path of the laser or the external transmission light path from being thoroughly damaged when a micro fault point occurs on the light path.
Drawings
FIG. 1 is a schematic diagram of a water-cooled high-power fiber laser output head with output light path and output light power detection function according to the present invention.
FIG. 2 is a schematic diagram of the assembly of the metal inner sleeve, the beam expanding unit, the mode stripping unit, the detachable plug and the optical fiber in the water-cooled high-power optical fiber laser output head with the output light path and the output light power detection function.
FIG. 3 is a schematic diagram of a multi-channel turn-back cooling water diversion trench on the outer surface of a metal inner sleeve in a water-cooled high-power fiber laser output head with output light path and light output power detection function.
FIG. 4 is a schematic diagram of the structure of the metal outer sleeve in the water-cooled high-power fiber laser output head with the output light path and the output light power detection function.
FIG. 5 is a schematic diagram of a metal inner sleeve in a water-cooled high-power fiber laser output head with output light path and output light power detection function according to the present invention.
Fig. 6 is a schematic diagram of a detachable plug structure in a water-cooled high-power fiber laser output head with output light path and output light power detection function according to the present invention.
Fig. 7 is a schematic diagram of a detachable bolt structure semi-cylinder structure in a water-cooled high-power fiber laser output head with output light path and output light power detection function.
FIG. 8 is a schematic diagram of the principle of protecting the optical path of the water-cooled high-power fiber laser output head with the output optical path and the output optical power detection function.
Detailed Description
The present invention will be described in detail with reference to examples and drawings.
Referring to fig. 1, the water-cooled high-power fiber laser output head with output light path and output light power detection function shown in the drawing comprises a metal outer sleeve 200 with a water inlet port 221 and a water outlet port 222, a metal inner sleeve 300 with a cooling water diversion trench on the outer surface, a detachable plug 400 and a tail pipe 500.
The water-cooled high-power fiber laser output head with the output light path and the output light power detection function adopts a detachable structure, the metal inner sleeve 300 and the metal outer sleeve 200 are mutually independent, and the two detached structural schematic diagrams are respectively shown in fig. 2 to 5.
The metal inner sleeve 300 should be copper or aluminum having a high thermal conductivity, and the wall of the cylinder should be as thin as possible while securing mechanical strength.
The metal inner sleeve 300 is divided into a beam expanding unit installation section 310, an optical fiber fusion section 320, a mode stripping unit installation section 330, and a detachable plug pin insertion section 340, the beam expanding unit 600 is installed in the beam expanding unit installation section 310, the mode stripping unit 700 is installed in the mode stripping unit installation section 330, and the detachable plug pin 400 is inserted into the detachable plug pin insertion section 340.
In order to reduce the back reflection beam from heating the inner surface of the beam expanding unit mounting section 310 of the metal inner sleeve 300, the inner surface of the beam expanding unit mounting section 310 of the metal inner sleeve 300 is coated with a coating film 311 having a high reflection effect on the near infrared band.
In order to increase the absorptivity of the stripped clad light by the mode stripper unit 700, the inner surface of the mode stripper unit mounting section 330 of the metal inner sleeve 300 is roughened and then coated with a high temperature resistant absorbing layer. For the metal inner sleeve 300 made of aluminum material, after the inner surface of the mode stripping unit installation section 330 of the metal inner sleeve 300 is roughened, a dense anodic oxide layer having a thickness of not more than 100nm is formed on this roughened surface.
A plurality of turn-back cooling water diversion grooves 301 are arranged on the outer surface of the metal inner sleeve 300, the inlets of the turn-back cooling water diversion grooves 301 are communicated with the water inlet interface 221, and the outlets of the turn-back cooling water diversion grooves 301 are communicated with the water outlet interface 222.
A rubber sealing ring 350 is arranged at the transition between the outer surface of the beam expanding unit mounting section 310 and the outer surface of the optical fiber welding section 320 of the metal inner sleeve 300, and at least two rubber sealing rings 361 and 362 are arranged on the outer surface of the detachable bolt inserting section 340 of the metal inner sleeve 300. An internal thread 342 is provided on the inner surface of the detachable plug insertion section 340 of the metal inner sleeve 300.
Outer metal sleeve 200 is made of stainless steel material having high corrosion resistance, and its inner surface should be as smooth as possible and not be able to react with the primary cells of inner metal sleeve 300.
The metal outer sleeve 200 has a cylindrical section 210 matched with the optical fiber fusion splicing section 320, the mode stripping unit mounting section 330 and the detachable bolt inserting section 340 of the metal inner sleeve 300 and an inclined section 220 matched with the beam expanding unit mounting section 310 of the metal inner sleeve 300, and a sealing ring groove 230 is arranged at the transition between the inner surface of the cylindrical section 210 and the inner surface of the inclined section 220 of the metal outer sleeve 200; a water inlet port 211, a water outlet port 212 and external threads 213 are arranged at one end of the cylindrical section 210 of the metal outer sleeve 200 connected with the tail pipe 500; in addition, a circular ring 240 with a diversion trench is arranged on the cylinder section 210 of the metal outer sleeve 200 near the water inlet interface 211 and the water outlet interface 212, so that possible water leakage is prevented from directly flowing into the collimation focusing unit along the laser output head.
After the metal inner sleeve 300 is inserted into the metal outer sleeve 200, a plurality of parallel cooling water diversion grooves 332 and 341 of the mode stripping unit installation section 330 and the detachable bolt insertion section 340 of the metal inner sleeve 300 and a plurality of turn-back cooling water diversion grooves 321 are arranged on the outer surface of the optical fiber welding section 320, so that a cooling water passage can be formed between the metal inner sleeve 300 and the inner surface of the metal outer sleeve 200, and a water cooling device surrounding the mode stripping unit 700 and the welding points 810 of the optical fiber 800 and the beam expanding unit 600 is formed.
A detachable water inlet terminal 250 and a detachable water outlet terminal 260 are respectively connected to the water inlet interface 211 and the water outlet interface 212. The special construction of the water cooling device of the present invention enables both the water inlet terminal 250 and the water outlet terminal 260 of the cooling water to be located at the tail side of the laser output head of the present invention instead of one at the head and the other at the tail. This design allows the laser output head of the present invention to conveniently match the currently prevailing interface standards such as QBH.
After the internal thread 510 in the tail pipe 500 is screwed on the external thread 213 of the metal outer sleeve 200 and locked, the rubber seal 350 arranged at the transition between the outer surface of the beam expanding unit mounting section 310 and the outer surface of the optical fiber welding section 320 of the metal inner sleeve 300 can be tightly propped against the seal ring groove 230 at the transition between the inner surface of the cylindrical section 210 and the inner surface of the inclined section 220 of the metal outer sleeve 200, the rubber seal 361 seals between the inner surface of the metal outer sleeve 200 and the outer surface of the metal inner sleeve 300, and the rubber seal 362 seals between the inner surface of the tail pipe 500 and the outer surface of the metal inner sleeve 300.
The other end of the tail pipe 500 is connected to an armored output optical fiber, and the armored output optical fiber is connected to the optical fiber 800 passing through the tail pipe 500 through an optical path.
The rubber seal 350 and the rubber seal 361 seal both ends of the multi-turn cooling water diversion trench 301 on the outer surface of the metal inner sleeve 300 together.
In addition, a metal ring 900 with a transparent rubber ring 910 is sleeved at the end of the inclined part 220 of the metal outer sleeve 200 and the end of the beam expanding unit mounting section 310 of the metal inner sleeve 300, and the transparent rubber ring 910 can be tightly attached to the end of the inclined part 220 of the metal outer sleeve 200 and the end of the beam expanding unit mounting section 310 of the metal inner sleeve 300 when the metal ring 900 is screwed; as a secondary barrier, prevents as much water leakage as possible. The transparent rubber ring 910 inside must be as small as possible to meet the waterproof requirement, and the condition of blocking the light path cannot occur.
The transparent rubber ring 910 should have as high transmittance as possible for light waves in the near infrared band, especially light waves in the range of 1000-1100 nm, so as to avoid heating by possible reflected light irradiation.
Referring to fig. 6 and 7 in combination, the detachable plug 400 is made of copper or aluminum material, which is the same material as the metal inner tube 300.
The detachable bolt 400 comprises a bolt body 410, a reflecting cap 420, a temperature sensor 430 and a photosensitive sensor 440, wherein the bolt body 410 is divided into a semi-cylinder 411 and a full cylinder 412 which are mutually connected, the reflecting cap 420 is arranged on the tail end of the semi-cylinder 411 through a bolt 421, a sensor installation cavity 413 is formed in the semi-cylinder 411, an optical fiber hole 414 and a sensor cable channel 415 are formed in the semi-cylinder 411 and the full cylinder 412, the optical fiber hole 414 is communicated with an inner hole 422 of the reflecting cap 420, and the sensor cable channel 415 is communicated with the sensor installation cavity 413; the temperature sensor 430 and the photo sensor 440 are installed in the sensor installation cavity 413, the sensor cable 430 connected to the temperature sensor 430 and the photo sensor 440 passes through the sensor cable channel 415, and the optical fiber 800 passes through the optical fiber hole 414 and the inner hole 422 of the reflection cap 420.
The external thread 416 is provided on the full cylinder 412, and after the detachable plug 400 is assembled, the detachable plug 400 can be inserted into the detachable plug insertion section 340 of the metal inner sleeve 300 by screwing the external thread 416 of the detachable plug 400 into the internal thread 342 on the inner surface of the detachable plug insertion section 340 of the metal inner sleeve 300.
The outer surface 423 of the reflective cap 420 is at a 45 angle to the optical fiber 800. Considering that part of cladding light may be irradiated to the front end of the detachable plug 400 when the mode peeling unit 700 in the metal inner sleeve 300 is operated, so that the detachable plug 400 is locally heated, a conical reflection cap 420 with a high reflection coating coated on the outer surface is installed at a position of the detachable plug 400 adjacent to the mode peeling unit 700.
The temperature sensor 430 of the present invention is used to monitor the temperature transferred from the metal inner sleeve 300 to the detachable plug 400, and to protect the temperature sensor 430 and the photo sensor 440 inside the detachable plug 400. Or when the waterway is blocked, a temperature alarm is provided.
The photosensor 440 is mainly used for detecting whether the optical path is normal before the high-energy laser is started, and plays a role in protecting the optical path.
Referring to fig. 8, a high-energy laser 30 and an indication red light 29 inside the laser are coupled through a beam combiner 31 to be output on a transmission fiber 32 to a water-cooled high-power fiber laser output head a having an output optical path and an output optical power detection function of the present invention. Before the laser starts the high-energy laser 30, the laser first outputs the indication red light 29, and when the photosensor 440 in the water-cooled high-power fiber laser output head a with the output light path and the output light power detection function of the present invention detects red light, it is considered that there is no abnormality in the light path from the indication red light 29 inside the laser to the photosensor 440 in the laser output head a, and the laser starts outputting the high-energy laser.
The photosensor 440 used in the present invention does not require any modification to the fiber and can detect light leaking from the cladding by simply being in close proximity to the fiber 800. The indication red light 29 of the present invention is signal modulated to ensure that the system can eliminate interference. The response time of the photosensor 440 of the present invention, as well as the modulated signal pulses, should be as short as possible to ensure that the system detects the optical path in as short a time as possible.
Claims (17)
1. The utility model provides a high-power optic fibre laser output head of water-cooled with output light path and play optical power detection function which characterized in that includes:
a metal inner sleeve, in which a mode stripping unit, a beam expanding unit and an optical fiber are arranged;
the metal outer sleeve is sleeved on the outer surface of the metal inner sleeve, and the inner surface of the metal outer sleeve and the cooling water diversion groove on the outer surface of the metal inner sleeve form a cooling water passage;
a detachable plug with a photosensitive heat-sensitive sensor arranged inside, wherein the detachable plug is inserted into the second end of the metal inner sleeve;
the optical fiber is connected with the beam expanding unit through an optical path and sequentially passes through the mode stripping unit and the detachable bolt.
2. The water-cooled high-power fiber laser output head with output light path and output light power detection function as claimed in claim 1, further comprising a tail pipe, wherein one end of the tail pipe is connected with the metal outer sleeve, the metal inner sleeve and the metal outer sleeve are locked together and used for closing a cooling water passage between the metal outer sleeve and the metal inner sleeve, the other end of the tail pipe is connected with an armored output fiber, and the armored output fiber is connected with the fiber passing through the tail pipe through the light path.
3. The water-cooled high-power fiber laser output head with output light path and output light power detection function as claimed in claim 2, wherein a water inlet terminal and a water outlet terminal are arranged on the metal outer sleeve, and cooling water enters a cooling water passage between the metal outer sleeve and the metal inner sleeve through the water inlet terminal and flows out from the water outlet terminal.
4. The water-cooled high-power fiber laser output head with output light path and output light power detection function as claimed in claim 2, wherein the metal inner sleeve is made of aluminum or copper with high heat conductivity coefficient.
5. The water-cooled high-power fiber laser output head with output light path and output light power detection function as claimed in claim 2, wherein the metal outer sleeve is made of stainless steel material.
6. A water-cooled high-power optical fiber laser output head with output light path and output light power detection function according to claim 3, wherein the metal inner sleeve is divided into a beam expanding unit mounting section, an optical fiber fusion splicing section, a mode stripping unit mounting section and a detachable plug pin inserting section, the beam expanding unit is mounted in the beam expanding unit mounting section, the mode stripping unit is mounted in the mode stripping unit mounting section, and the detachable plug pin is inserted into the detachable plug pin inserting section.
7. The water-cooled high-power fiber laser output head with output light path and output light power detection function as claimed in claim 6, wherein a coating film with high reflection effect on near infrared light wave band is coated on the inner surface of the beam expanding unit mounting section of the metal inner sleeve.
8. The water-cooled high-power fiber laser output head with output light path and output light power detection function as claimed in claim 6, wherein the inner surface of the mode stripping unit mounting section of the metal inner sleeve is coated with a high-temperature resistant absorption layer after roughening treatment.
9. The water-cooled high-power fiber laser output head with output light path and output light power detection function as claimed in claim 6, wherein a plurality of parallel turn-back cooling water diversion grooves are arranged on the outer surface of the metal inner sleeve, inlets of the plurality of parallel turn-back cooling water diversion grooves are communicated with the water inlet terminal, and outlets of the plurality of parallel turn-back cooling water diversion grooves are communicated with the water outlet terminal.
10. The water-cooled high-power fiber laser output head with output light path and output light power detection function as claimed in claim 9, wherein a circular ring with a diversion trench is arranged on the metal outer sleeve close to the water inlet and outlet terminals, so as to prevent possible water leakage from directly flowing into the collimation focusing unit along the laser output head.
11. The water-cooled high-power fiber laser output head with output light path and output light power detection function as claimed in claim 10, wherein the metal outer sleeve is provided with a cylindrical section matched with the fiber welding section, the mode stripping unit mounting section and the detachable bolt inserting section of the metal inner sleeve and an inclined section matched with the beam expanding unit mounting section of the metal inner sleeve, and a sealing ring groove is arranged at the transition part of the inner surface of the cylindrical section of the metal outer sleeve and the inner surface of the inclined section; a rubber sealing ring is arranged at the transition part of the outer surface of the installation section of the beam expanding unit of the metal inner sleeve and the outer surface of the optical fiber welding section, and at least two rubber sealing rings are arranged on the outer surface of the detachable bolt insertion section of the metal inner sleeve; after the metal inner sleeve is inserted into the metal outer sleeve and locked by the tail pipe, the rubber sealing rings at the transition part of the outer surface of the beam expanding unit installation section of the metal inner sleeve and the outer surface of the optical fiber welding section are propped against the sealing ring grooves, and the outer surface of the detachable bolt insertion section of the metal inner sleeve is respectively sealed with the metal outer sleeve and the tail pipe by at least two rubber sealing rings.
12. The water-cooled high-power fiber laser output head with output light path and output light power detection function as claimed in claim 11, wherein a metal ring with a transparent rubber ring is sleeved at the inclined part end of the metal outer sleeve and the end of the beam expanding unit mounting section of the metal inner sleeve, and the transparent rubber ring can be tightly attached to the inclined part end of the metal outer sleeve and the end of the beam expanding unit mounting section of the metal inner sleeve when the metal ring is screwed.
13. The water-cooled high-power fiber laser output head with output light path and output light power detection function as claimed in claim 12, wherein the transparent rubber ring can transmit light waves with the wavelength of 1000-1100 nm, and can avoid being heated by possible reflected light irradiation.
14. The water-cooled high-power fiber laser output head with output light path and output light power detection function according to any one of claims 1 to 13, wherein the detachable plug comprises a plug body, a reflecting cap, a temperature sensor and a photosensitive sensor, the plug body is divided into a semi-cylinder and a full cylinder which are connected with each other, the reflecting cap is mounted on the end of the semi-cylinder, a sensor mounting cavity is formed in the semi-cylinder, and a fiber hole and a sensor cable channel are formed in the semi-cylinder and the full cylinder, the fiber hole is communicated with the inner hole of the reflecting cap, and the sensor cable channel is communicated with the sensor mounting cavity; the temperature sensor and the photosensitive sensor are installed in the sensor installation cavity, a sensor cable connected with the temperature sensor and the photosensitive sensor passes through the sensor cable channel, and the optical fiber passes through the optical fiber hole and the inner hole of the reflecting cap.
15. The water-cooled high-power fiber laser output head with output light path and output light power detection function according to claim 14, wherein the outer surface of the reflecting cap forms an included angle of 45 degrees with the optical fiber.
16. The water-cooled high power fiber laser output head with output light path and output light power detection function of claim 15, wherein a high reflective coating is plated on the outer surface of said reflective cap.
17. The water-cooled high-power fiber laser output head with output light path and output light power detection function as claimed in claim 14, wherein the laser first outputs indication red light before the laser starts high-energy laser, and when the photosensor detects red light, it is considered that there is no abnormality in the light path from the inside of the laser to the photosensor, and the laser starts outputting high-energy laser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710677616.6A CN107332100B (en) | 2017-08-09 | 2017-08-09 | Water-cooled easy-to-disassemble and-wash laser output head with output light path and light output power detection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710677616.6A CN107332100B (en) | 2017-08-09 | 2017-08-09 | Water-cooled easy-to-disassemble and-wash laser output head with output light path and light output power detection function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107332100A CN107332100A (en) | 2017-11-07 |
| CN107332100B true CN107332100B (en) | 2023-08-01 |
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Family Applications (1)
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| CN201710677616.6A Active CN107332100B (en) | 2017-08-09 | 2017-08-09 | Water-cooled easy-to-disassemble and-wash laser output head with output light path and light output power detection function |
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| CN109994918B (en) * | 2018-01-02 | 2020-06-26 | 深圳市创鑫激光股份有限公司 | Laser output head and laser with same |
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| CN110323657B (en) * | 2018-03-31 | 2021-06-11 | 深圳市创鑫激光股份有限公司 | Laser output head and laser |
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| CN110323658B (en) * | 2018-03-31 | 2021-08-24 | 深圳市创鑫激光股份有限公司 | Laser output head and laser |
| CN109244804B (en) * | 2018-10-31 | 2020-06-09 | 深圳市创鑫激光股份有限公司 | Laser and laser output head thereof |
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| WO2021092953A1 (en) * | 2019-11-15 | 2021-05-20 | 广东省智能机器人研究院 | Optical fiber output head |
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