CN112652937A - Laser device with anti-return light - Google Patents
Laser device with anti-return light Download PDFInfo
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- CN112652937A CN112652937A CN202011536337.6A CN202011536337A CN112652937A CN 112652937 A CN112652937 A CN 112652937A CN 202011536337 A CN202011536337 A CN 202011536337A CN 112652937 A CN112652937 A CN 112652937A
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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
- H01S3/005—Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping
- H01S3/0064—Anti-reflection devices, e.g. optical isolaters
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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
- H01S5/00—Semiconductor lasers
- H01S5/005—Optical components external to the laser cavity, specially adapted therefor, e.g. for homogenisation or merging of the beams or for manipulating laser pulses, e.g. pulse shaping
- H01S5/0064—Anti-reflection components, e.g. optical isolators
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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
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/024—Arrangements for thermal management
- H01S5/02407—Active cooling, e.g. the laser temperature is controlled by a thermo-electric cooler or water cooling
- H01S5/02423—Liquid cooling, e.g. a liquid cools a mount of the laser
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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
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/024—Arrangements for thermal management
- H01S5/02438—Characterized by cooling of elements other than the laser chip, e.g. an optical element being part of an external cavity or a collimating lens
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Optics & Photonics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
The utility model provides an anti laser instrument that returns light, includes laser output module, the fibre core transmission of the laser of this laser output module output through output optical fiber, one section strip the coating in this output optical fiber, and second cladding surface is through texturing, and this section output optical fiber is as first optic fibre texturing district for the cladding light in the filtering optic fibre, the end of this output optical fiber and the output optical cable optical fiber butt fusion of output optical cable, this output optical cable optical fiber end with quartz column butt fusion, one section strip the coating in this output optical cable optical fiber, and third cladding surface is through texturing, this section output optical cable optical fiber is as second optic fibre texturing district, be used for the cladding light in the filtering optic fibre, output optical fiber be double-clad fiber, output optical cable optical fiber be three cladding optic fibers. The invention can greatly reduce the safety risk of the returned light to the laser and improve the service life of the laser.
Description
Technical Field
The invention relates to the technical field of lasers, in particular to a laser capable of resisting return light.
Background
In industrial processing of the laser, according to different operation materials, more or less laser can be reflected by the surface of the material to enter an output optical cable of the laser, so that the failure of devices and even the failure of the whole machine can be caused. In the prior art of domestic lasers, cladding optical fiber filtering is performed at the position, close to the output end, of the output optical cable, but the water cooling effect of the output optical cable is limited, so that the effect of filtering return light can be met under the condition that the return light power is not high. However, when the processing object is a thick high-reflection material, because the laser needs high-power operation, the power of returning light under the condition can be very large, if the original filtering process is still adopted, the water cooling of the output optical cable cannot meet the requirement of cooling, mechanical parts inside the output head can be in continuous temperature rise, and finally an optical fiber coating layer can be burnt to cause the failure of the output optical cable.
The invention patent of publication No. CN211629511U provides a structure for preventing laser from returning light, comprising: the laser tail fiber includes: the tail fiber core and a tail fiber cladding wrapping the tail fiber core; the anti-return optical fiber includes: the fiber core is communicated with the fiber core of the tail fiber, the diameter of the fiber core is larger than the diameter of the fiber core of the tail fiber by a set proportion, the fiber core is communicated with the inside of the cladding of the tail fiber, and the fiber core is wrapped by the cladding of the fiber; one side of the tail fiber cladding layer, which is close to the fiber cladding layer, is provided with a texturing section with a set length and used for leaking return light. Although, when the return light of the laser is reversely transmitted along the anti-return optical fiber to the tail fiber of the laser, most of the light of the fiber core can be coupled into the tail fiber cladding, and then the light is leaked out through the texturing section of the tail fiber cladding, and the light cannot be continuously transmitted into the laser in the reverse direction, so that the return light can be effectively prevented from entering the laser, but the return light usually does not enter the laser, the failure of the laser is caused when the return light passes back in the output optical cable, and the problem that the return light harms the whole laser equipment cannot be thoroughly solved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the laser for resisting the return light, and the laser can safely return most of the return light entering the optical fiber of the transmission optical cable to the output optical fiber for filtering, thereby greatly reducing the filtering pressure of the output optical cable on the return light and ensuring the safe operation of the output optical cable. Meanwhile, in actual production, the cladding filtering module and the laser output module are installed in a case of the laser, and a large-volume water-cooling shell can be designed according to requirements to provide high-strength water cooling, so that safe and effective filtering of all return light is realized.
The technical solution of the invention is as follows:
the laser is characterized by comprising a laser output module, wherein laser output by the laser output module is transmitted through a fiber core of an output optical fiber, a coating layer is stripped off from one section of the output optical fiber, the surface of a second cladding layer is subjected to texturing treatment, the section of the output optical fiber is used as a first fiber texturing area and is used for filtering cladding light in the optical fiber, the tail end of the output optical fiber is in fusion joint with an output optical cable fiber of an output optical cable, the tail end of the output optical cable fiber is in fusion joint with a quartz column, the coating layer is stripped off from one section of the output optical cable fiber, the surface of a third cladding layer is subjected to texturing treatment, the section of the output optical cable fiber is used as a second fiber texturing area and is used for filtering the cladding light in the optical fiber, the output optical fiber is a double-cladding fiber, and the output optical cable fiber is a three-cladding.
The diameter and the numerical aperture of the fiber core of the output optical cable fiber and the diameter of the third cladding are respectively the same as the diameter and the numerical aperture of the fiber core of the output optical cable fiber and the diameter of the second cladding, and the numerical aperture of the third cladding of the output optical cable fiber is smaller than the numerical aperture of the second cladding of the output optical fiber.
The first optical fiber texturing area is packaged by a water-cooling shell, and a water inlet hole and a water outlet hole which are communicated with a water cooler are formed in the water-cooling shell.
Output optical cable's one end connect output head main part, this output head main part is established the casing outside this inner core by inner core and cover and is constituted, forms airtight space between this inner core and the casing, is equipped with the quartz post recess that supplies the quartz post to place and supplies the speculum recess that the speculum was placed in this inner core outer end, output optical cable optic fibre pass from this inner core, the warp the centre bore of speculum with quartz post butt fusion, second optic fibre texturing zone be located speculum and quartz post between.
The speculum orientation quartz column's one side plated the reflectance coating, the separation gets into the light that returns of inner core through quartz column, returns the light reflection with this part, the another side sets gradually quartz gasket, spring and optic fibre mounting, output optical cable optic fibre pass in proper order optic fibre mounting, spring and quartz gasket's centre bore after arrive the speculum. The inner end of the inner core is locked with the optical fiber fixing piece through a screw. The inner core has good heat-conducting property.
And the shell of the output head main body part is provided with through holes which are respectively communicated with the water inlet and the water outlet of the water cooler.
And the optical cable protection tube is sleeved outside the output optical cable optical fiber and is used for protecting the output optical cable optical fiber. The connection part of the output main body part and the output optical cable is provided with an outer sleeve, the outer sleeve is connected with one end of an optical cable protection tube through an output head connecting piece, and the other end of the optical cable protection tube is installed on a case of the laser through the armor fixing piece.
Preferably, the third cladding of the output optical cable fiber is a quartz fluorine-doped cladding.
The invention has the following technical effects:
(1) after returning light enters the output optical cable, the returning light enters the optical fiber and mainly returns in the second cladding, and a small amount of returning light enters the third cladding, exits in a second optical fiber texturing area behind the quartz column and is absorbed by an inner core in the output head; the return light which does not enter the optical fiber is transmitted in the inner core space, the inner core is provided with a reflecting lens to prevent the return light from being transmitted all the way backwards, and finally, the part of the light is also completely absorbed by the inner core. By reducing the filtering power of the optical fiber cladding, the light absorption power of the inner core can be effectively reduced, and the water cooling can meet the temperature stabilizing effect.
(2) Although most of returned light returns at the second cladding of the output optical cable fiber, the second cladding is coated with a thin fluorine-doped cladding, so that the coating layer of the fiber is not subjected to heat aggregation, and the fiber is prevented from being burnt.
(3) The returning light returned in the second cladding of the output optical fiber can completely enter the second cladding of the output optical fiber, is emitted out of the first optical fiber texturing area and absorbed by the water-cooling shell, and the volume of the water-cooling shell can be designed according to requirements, so that the water-cooling effect can be completely realized.
(4) The invention can greatly reduce the safety risk of the returned light to the laser and improve the service life of the laser.
Drawings
FIG. 1 is a schematic diagram of a laser with anti-back-reflection capability according to the present invention;
FIG. 2 is a cross-sectional view of the optical fiber, with the output fiber on the left and the output cable fiber on the right;
FIG. 3 is a schematic structural view of a first fiber texturing region;
FIG. 4 is a schematic diagram of a second fiber texturing region.
Detailed Description
The present invention will be further described with reference to the following examples and drawings, but the scope of the present invention should not be limited thereto.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a laser device for resisting return light according to the present invention, and it can be seen from the diagram that the laser device for resisting return light according to the present invention includes a laser output module 1, a cladding filtering module 2 and an output optical cable 3, where the laser output module 1 includes an output optical fiber 1.1, the cladding filtering module 2 includes a water-cooled housing 2.1 and a first optical fiber texturing region 2.2, and the output optical cable 3 includes an output head main body part 3.1, an inner core 3.2, a quartz column 3.3, an output optical cable optical fiber 3.4, a second optical fiber texturing region 3.5, a reflective lens 3.6, a quartz gasket 3.7, a spring 3.8, an optical fiber fixing part 3.9, an outer sleeve 3.10, an output head connecting part 3.11, an optical cable protection tube 3.12 and an armor fixing part 3.13.
The output optical fiber 1.1 is a double-clad optical fiber (as shown in the left side of fig. 2), the cladding filtering module 2 is arranged at the tail section of the output optical fiber 1.1, the coating layer of the optical fiber is stripped, texturing processing is carried out on the surface of the second cladding of the optical fiber to form the first optical fiber texturing region 2.2 (as shown in fig. 3), the region is packaged by the water-cooling shell 2.1, and a water inlet hole and a water outlet hole on the water-cooling shell 2.1 are communicated with a water-cooling machine (not shown).
The input end of the output optical cable 3 is a bare fiber of the output optical cable fiber 3.4, which is directly welded with the output optical fiber 1.1, the output end of the output optical cable 3 is the quartz column 3.3 welded with the output optical cable fiber 3.4, the cable protection tube 3.12 is sleeved outside the output optical cable fiber 3.4, the output optical cable fiber 3.4 is a triple-clad fiber, the diameter and numerical aperture of the fiber core and the diameter of the third cladding are respectively the same as the diameter and numerical aperture of the fiber core of the output optical fiber 1.1 and the diameter of the second cladding, the numerical aperture of the third cladding of the output optical cable fiber 3.4 is smaller than the numerical aperture of the second cladding of the output optical fiber 1.1, the coating layer of a section of the output optical cable fiber 3.4 connected with the quartz column 3.3 is stripped, and the texturing processing is performed on the surface of the third cladding of the fiber to form a second fiber texturing area 3.5 (as shown in fig. 4), the quartz column 3.3, the second optical fiber texturing area 3.5 and the backward output optical cable optical fiber 3.4 are additionally provided with the inner core 3.2 and the output head main body part 3.1, the front and back contact parts of the two parts form a closed space through a sealing ring, glue and the like, two holes on the output head main body part 3.1 are respectively communicated with a water inlet and a water outlet of a water cooler, one end of the inner core 3.2 is provided with a groove for placing the quartz column 3.3, a limiting groove for placing the reflecting lens 3.6 is arranged in the inner core 3.2 behind the second optical fiber texturing area 3.5, one surface of the reflecting lens 3.6 facing the quartz column 3.3 is plated with a reflecting film, the other surface of the reflecting lens 3.6 is sequentially provided with the quartz gasket 3.7 and the spring 3.8, the other end of the inner core 3.2 is locked by the optical fiber fixing part 3.9 through a screw, and the spring 3.8 is extruded to fix the reflecting lens 3.6, the end of the output main body part 3.1 is connected with one end of the outer sleeve 3.10 through a screw thread, the other end of the outer sleeve 3.10 is connected with one end of the optical cable protection tube 3.12 through the output head connecting piece 3.11, and the other end of the optical cable protection tube 3.12 is installed on the inner wall of the chassis (not shown) through the armor fixing piece 3.13.
The function of each main part in the device of the invention is as follows:
laser output module 1: laser light can be output.
Output fiber 1.1: the laser of the laser output module 1 is transmitted in the core of the optical fiber and is welded with the output optical cable fiber 3.4 by double-clad optical fiber
The cladding filtering module 2: the cladding light in the fiber is filtered out.
Water-cooled housing 2.1: fixed in the laser, there are water inlet and outlet on the shell to communicate with external water cooling machine, the laser output optical fiber passes through the water cooling shell.
First fiber texturing region 2.2: the section of the laser output optical fiber 1.1 in the water-cooled shell 2.1 is stripped of the coating layer, and the surface of the second cladding of the optical fiber is subjected to texturing treatment, so that transmission light in the cladding can be filtered.
Output optical cable 3: the laser transmission device is provided with an output head structure at one end, is matched with a use end and is welded with an output optical fiber 1.1 in the laser, and an exposed optical fiber at the other end;
output head main body 3.1: for the external mechanical part of the output head, the appearance specification and the size are matched with the adapter at the use end, and two holes on the main body part can be respectively communicated with the water inlet pipe and the water outlet pipe of the water cooling machine.
Inner core 3.2: the inner core 3.2 and the contact part of the two ends of the output head main body part 3.1 form a closed space through a sealing ring and glue, the output optical cable fiber 3.4 penetrates through the inner core 3.2, and the outer end of the inner core 3.2 is provided with a groove for placing a quartz column 3.3.
Quartz column 3.3: the output end of the output optical cable 3 is placed in a quartz column groove of the inner core 3.2 and is welded with one end of the output optical cable optical fiber 3.4.
Output cable fiber 3.4: the optical fiber is a three-clad optical fiber, one end of the optical fiber is welded with the laser output optical fiber 1.1, the other end of the optical fiber is welded with the quartz column 3.3, and laser transmitted in the fiber core of the laser output optical fiber 1.1 enters the fiber core of the output optical cable optical fiber 3.4 for transmission.
Second fiber texturing region 3.5: the coating layer of a section of optical fiber behind the fusion point of the output optical cable optical fiber 3.4 and the quartz column 3.3 is stripped, the second optical fiber texturing area 3.5 is arranged in the section of optical fiber, and the surface of the optical fiber of the third cladding of the optical fiber is subjected to texturing treatment, so that the transmission light in the cladding can be filtered.
Mirror plate 3.6: the central hole can only be penetrated by the output optical cable fiber 3.4, the stripping coating layer is arranged at the backward position of the end of the second optical fiber texturing area far away from the quartz column 3.3, and the surface facing the quartz column 3.3 is provided with a reflecting film for blocking the return light entering the inner core 3.2 through the quartz column 3.3 and reflecting the return light.
Quartz shim 3.7: the output optical fiber 3.4 can pass through the through hole structure and is placed behind the reflector 3.6 to be used as a gasket of the reflector.
Spring 3.8: after being placed on the quartz shim 3.7, the fiber passes through as an intermediate soft fixation medium.
Optical fiber fixing member 3.9: the middle of the inner core is provided with a through hole, the optical fiber can penetrate through the through hole, is placed behind the spring 3.8 and is in threaded connection with the tail end of the inner core 3.2, the quartz gasket 3.7 and the reflecting lens 3.6 are fixed through extruding the spring 3.8, and meanwhile, the optical fiber is fixed through dispensing.
Outer sleeve 3.10: one end of the optical fiber fixing piece is in threaded connection with the tail end of the output head main body piece 3.1, the other end of the optical fiber fixing piece is in threaded connection with the output head connecting piece 3.11, and the optical fiber between the protective layers is backwards protected by the optical fiber fixing piece 3.9.
Output head connector 3.11: the glan head structure connects the outer jacket tube 3.10 and the cable protection tube 3.12.
Optical cable protection tube 3.12: the optical fiber is protected.
Armor mount 3.13: the end of the cable protection tube 3.12 is fixed to the laser cabinet (not shown).
The working principle of the invention is as follows:
the cross sections of the output optical fiber 1.1 and the output optical cable fiber 3.4 are shown in fig. 2, the left drawing is the output optical fiber cross section drawing, the right drawing is the output optical cable fiber cross section drawing, the diameter and the numerical aperture of the fiber core of the output optical cable fiber 3.4 and the diameter of the third cladding are respectively the same as the diameter and the numerical aperture of the fiber core of the output optical fiber 1.1 and the diameter of the second cladding, and the numerical aperture of the third cladding of the output optical cable fiber 3.4 is smaller than the numerical aperture of the second cladding of the output optical fiber. When the laser output module 1 outputs laser, the laser can be transmitted in the fiber core of the output optical fiber 1.1 and can enter the fiber core of the output optical cable optical fiber 3.4 without damage; the returned light returning from the second cladding of the output cable fibre 3.4 can enter the second cladding of the output fibre 1.1 without damage.
When the laser acts on the high-reflection material through the output optical cable 3, a large amount of laser emitted from the output optical cable 3 can be reflected by the high-reflection material, and the returned light can enter the output optical cable 3 again through the quartz column 3.3. In this case, the return light which can be divided into the output cable fiber 3.4 may enter the output cable fiber 3.4 from a part of the light, or may be transmitted directly in the space of the inner core 3.2. For the return light entering the optical fiber, the return light mainly passes back in the second cladding due to the small size of the third cladding, and meanwhile, the third cladding (quartz fluorine-doped cladding) is arranged outside the second cladding, so that the safe return of the return light in the second cladding can be ensured. A very small amount of light entering the third cladding can be emitted and absorbed by the inner core 3.2 in the second optical fiber texturing region 3.5 due to the fact that the light cannot meet the law of total reflection; for the return light transmitted in space in the inner core 3.2, the reflecting lens 3.6 is arranged in the inner core 3.2, and the surface of the reflecting lens 3.6 facing the quartz column 3.3 is coated with a reflecting film, so that the return light is blocked from being transmitted backwards, and the part of the light is finally absorbed by the inner core 3.2. According to the invention, most of the returned light is returned to and transmitted out of the transmission optical cable for further processing, so that the optical power absorbed by the inner core is reduced, the water cooling requirement on the output optical cable 3 is reduced, and the risk of optical fiber burnout caused by temperature rise of the inner core 3.2 is reduced. The returned light is transmitted back to the first optical fiber texturing area 2.2 of the output optical fiber, and the outgoing light can be absorbed by the water-cooling shell 2.2 due to the fact that the total reflection law cannot be met, the volume of the water-cooling shell 2.2 can be designed according to requirements, the water-cooling effect is achieved, and the returned light can be safely and effectively filtered in the area. According to the invention, most of the return light entering the transmission optical cable optical fiber 3.4 is safely returned to the output optical fiber 1.1 for filtering, so that the filtering pressure of the output optical cable 3 on the return light is greatly reduced, and the safe operation of the output optical cable is ensured. Simultaneously, in actual production, can all install cladding filtering module 2 and laser output module 1 in the laser instrument machine incasement, can design bulky water-cooling casing 2.1 according to the demand, provide high-strength water-cooling to realize the safety of all returning back light, effective filtering. The invention can greatly reduce the safety risk of the returned light to the laser and improve the service life of the laser.
Claims (11)
1. The laser device is characterized by comprising a laser output module (1), wherein laser output by the laser output module (1) is transmitted through a fiber core of an output optical fiber (1.1), a coating layer is stripped off from one section of the output optical fiber (1.1), the surface of a second cladding is subjected to texturing treatment, the section of the output optical fiber (1.1) is used as a first optical fiber texturing area (2.2) for filtering cladding light in the optical fiber, the tail end of the output optical fiber (1.1) is welded with an output optical cable optical fiber (3.4) of an output optical cable (3), the tail end of the output optical cable optical fiber (3.4) is welded with a quartz column (3.3), a coating layer is stripped off from one section of the output optical cable optical fiber (3.4), the surface of the third cladding is subjected to texturing treatment, the section of the output optical cable optical fiber (3.4) is used as a second optical fiber texturing area (3.5), the output optical fiber (1.1) is a double-clad optical fiber, the output optical cable fiber (3.4) is a triple-clad fiber.
2. The laser of claim 1, wherein the diameter and numerical aperture of the core of the output optical cable fiber (3.4) and the diameter of the third cladding are respectively the same as the diameter and numerical aperture of the core of the output optical fiber (1.1) and the diameter of the second cladding, and the numerical aperture of the third cladding of the output optical cable fiber (3.4) is smaller than the numerical aperture of the second cladding of the output optical fiber (1.1).
3. The laser device of claim 1 or 2, wherein the first fiber texturing region (2.2) is encapsulated by a water-cooled housing (2.1), and the water-cooled housing (2.1) is provided with a water inlet hole and a water outlet hole for communicating with a water-cooled machine.
4. The laser of claim 1 or 2, wherein one end of the output optical cable (3) is connected to an output head body member (3.1), the output head body member (3.1) is composed of a core (3.2) and a housing sleeved outside the core (3.2), a closed space is formed between the core (3.2) and the housing, a quartz column groove for placing the quartz column (3.3) and a reflector groove for placing the reflector (3.6) are arranged in an outer end of the core (3.2), the output optical cable fiber (3.4) passes through the core (3.2) and is fused with the quartz column (3.3) through a central hole of the reflector (3.6), and the second fiber texturing region (3.5) is located between the reflector (3.6) and the quartz column (3.3).
5. The laser of claim 4, wherein one side of the reflector (3.6) facing the quartz pillar (3.3) is coated with a reflective film, and the other side is sequentially provided with the quartz pad (3.7), the spring (3.8) and the optical fiber fixing member (3.9), and the output optical cable fiber (3.4) sequentially passes through the central holes of the optical fiber fixing member (3.9), the spring (3.8) and the quartz pad (3.7) and then reaches the reflector (3.6).
6. The laser against light return of claim 5, characterized in that the inner end of the inner core (3.2) is locked with the fiber holder (3.9) by screws.
7. The laser of claim 4, characterized in that the core (3.2) has good thermal conductivity.
8. The laser device of claim 4, wherein the housing of the output head body member (3.1) is provided with through holes respectively communicating with the water inlet and the water outlet of the water cooler.
9. The laser device of claim 1, further comprising a cable protection tube (3.12) covering the output cable fiber (3.4) for protecting the output cable fiber (3.4).
10. The laser device of claim 9, wherein the connection between the output main body (3.1) and the output optical cable (3) is provided with an outer sleeve (3.10), the outer sleeve (3.10) is connected with one end of a cable protection tube (3.12) through an output head connector (3.11), and the other end of the cable protection tube (3.12) is mounted on the laser device case through the armor fastener (3.13).
11. The laser of claim 1, wherein the third cladding of the output cable fiber (3.4) is a silica fluorine-doped cladding.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011536337.6A CN112652937B (en) | 2020-12-23 | 2020-12-23 | Laser device with anti-return light |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011536337.6A CN112652937B (en) | 2020-12-23 | 2020-12-23 | Laser device with anti-return light |
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| CN112652937A true CN112652937A (en) | 2021-04-13 |
| CN112652937B CN112652937B (en) | 2021-08-27 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113510395A (en) * | 2021-04-16 | 2021-10-19 | 上海飞博激光科技有限公司 | Integrated laser output head |
| CN114374136A (en) * | 2022-01-06 | 2022-04-19 | 上海飞博激光科技有限公司 | Returned light monitoring device of pulse fiber laser |
| CN115842279A (en) * | 2023-02-20 | 2023-03-24 | 光越科技(深圳)有限公司 | Integrated laser output head with efficient heat management |
| CN117954946A (en) * | 2024-03-26 | 2024-04-30 | 北京凯普林光电科技股份有限公司 | Laser output head and laser output device |
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