CN107508123A - A kind of optical fiber laser fibre cladding residual pump photospallation method - Google Patents
A kind of optical fiber laser fibre cladding residual pump photospallation method Download PDFInfo
- Publication number
- CN107508123A CN107508123A CN201710802137.2A CN201710802137A CN107508123A CN 107508123 A CN107508123 A CN 107508123A CN 201710802137 A CN201710802137 A CN 201710802137A CN 107508123 A CN107508123 A CN 107508123A
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- China
- Prior art keywords
- optical fiber
- inner cladding
- residual pump
- fiber laser
- photospallation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
-
- 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
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Lasers (AREA)
Abstract
The invention discloses a kind of optical fiber laser fibre cladding residual pump photospallation method, this method is had coat on surrounding layer, comprised the following steps based on the doubly clad optical fiber with inner cladding and surrounding layer：The one section of coat and surrounding layer of the doubly clad optical fiber of optical fiber laser output end are divested so that the inner cladding of this section of doubly clad optical fiber is exposed；Punched using laser beam in exposed inner cladding lateral wall according to default frequency, form several peel grooves, the interface of the peel groove and inner cladding forms light plane of refraction；In inner cladding internal reflection, covering residual pump light occurs refraction in peel groove and inner cladding interface and is emitted towards inner cladding outward leakage the covering residual pump light transmitted in inner cladding, realizes the stripping of covering residual pump light.The present invention is easy to operate, and implementation cost is relatively low, will not destroy the original structure of optical fiber.
Description
Technical field
The invention belongs to fiber laser technology field, specifically a kind of optical fiber laser fibre cladding residual pump
Photospallation method.
Background technology
Optical fiber laser due to have the advantages that energy dress change efficiency high, simple in construction, cost is cheap, beam quality is high and
It is widely used in the industrial circles such as laser welding, cutting, punching, surface treatment and mark, its Specifeca tion speeification has：Output
Number of the pump light remained in power, beam quality, total system photoelectric transformation efficiency, optical fiber etc..Optical fiber laser has
Source medium is usually the quartz glass optical fiber mixed with Rare earth element ytterbium, and its corresponding absorption spectra is about 910-977 nanometers, hair
It is about 1032-1064 nanometers to penetrate spectrum, and it has two kinds of typical structures：One kind is fiber resonance cavity structure, i.e., makes in a fiber
A pair of DBR gratings, depending on the reflectivity of DBR gratings is by design, so between two DBR gratings, it will be formed specific
The optical resonance of wavelength；Concussion-optical amplifier structure based on another structure, i.e., the laser of optical fiber laser is by semiconductor seed
Light source is provided, and optical active fiber medium is amplified to the laser for coming from seed light source.
The current Active Optical Fiber generally used uses double-clad structure, is made up of inner core, inner cladding and surrounding layer, wherein interior
Core diameter is 10 microns, and inner cladding is the quartz glass that thickness is 130 microns, and surrounding layer is that thickness is 250
The even more big coat of micron.The inner core of optical fiber only supports single mode transport, so beam quality is high, for transmitting and amplifying
Signal laser；It is such to design the beam quality that both ensure that optical-fiber laser and inner cladding is used for coupling and transmitting pump light, together
When add the coefficient of coup between pump light and active medium again, improve the overall energy conversion efficiency of system.
Because pump light in communication process, is decayed with exponential form in Active Optical Fiber, so by finite length
Active Optical Fiber after, also part residual light is stayed in optical fiber., can be to the stabilization of system if these residual lights do not remove
Property and performance make a big impact, for this need in systems photospallation device eliminate residual pump light.Therefore, bag is efficiently peeled off
Residual pump light has great significance to improving high power fiber laser beam quality in layer.
Existing fibre cladding remnant pump photospallation device mainly by acid corrosion, sintering, beat the modes such as trace and destroy light
The mode of fine protective layer and surrounding layer realizes the removal of pump light.Manufacture craft based on corrosion with the pump light stripper of sintering
It is complex and costly.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of optical fiber laser fibre cladding residual pump photospallation method,
Easy to operate, implementation cost is relatively low.
In order to solve the above-mentioned technical problem, the present invention takes following technical scheme：
A kind of optical fiber laser fibre cladding residual pump photospallation method, the optical fiber of the optical fiber laser include inner cladding,
Surrounding layer and coat, inner cladding are in inside surrounding layer and are outsourced layer cladding, and surrounding layer outer surface is provided with coat and quilt
Coat coats；During optical fiber laser fibre cladding residual pump photospallation,
The one section of coat and surrounding layer of the optical fiber laser output end optical fiber are divested first so that the interior bag of this section of optical fiber
Layer is exposed；
Punched again using laser beam in exposed inner cladding lateral wall according to default frequency, form several peel grooves, should
The interface of peel groove and inner cladding forms light plane of refraction.
The center for several light planes of refraction that several described peel grooves are formed is in fiber perpendicular on axial plane
It is uniformly distributed on perspective plane and angle is approximate each other.
The center for several light planes of refraction that several described peel grooves are formed is uniformly distributed on shaft axis of optic fibre direction.
The center for several light planes of refraction that several described peel grooves are formed is in the cylindrical of optical fiber inner cladding naked section
It is uniformly distributed on curved surface and is covered with the outer round surface.
The depth of the peel groove is less than the thickness of inner cladding.
The peel groove is irregular shape.
The peel groove is from the direction of the incident end face direction outgoing end face of doubly clad optical fiber, according to from dredging close density
Arranged distribution, or be uniformly distributed.
The laser beam is ultra high frequency laser light beam.
The shapes and sizes of each peel groove are identical.
The distributed number of the peel groove is optical fiber per cm more than 5.
If the present invention in inner cladding lateral wall by processing individual irregular peel groove, pump light is in inner cladding internal reflection
When, light is reflected in peel groove and inner cladding interface, and original transmission direction can not be continued in inner cladding and is advanced,
Different directions are emitted to outside inner cladding in from peel groove, and avoiding output end face has the output of clad pumping optical, realizes that covering is residual
Stay the efficient stripping of pump light.
Brief description of the drawings
The concrete structure schematic diagram that accompanying drawing 1 describes for covering residual pump photospallation method in the present invention；
Accompanying drawing 2 is the beam projecting schematic diagram of covering residual pump light in the present invention.
Embodiment
For the ease of the understanding of those skilled in the art, the invention will be further described below in conjunction with the accompanying drawings.
As shown in figure 1 and 2, present invention is disclosed a kind of optical fiber laser fibre cladding residual pump photospallation method,
The optical fiber of the optical fiber laser includes inner cladding 103, surrounding layer 102 and coat 101, and inner cladding is in inside surrounding layer simultaneously
Layer cladding is outsourced, surrounding layer outer surface is provided with coat and is applied layer cladding；Optical fiber laser fibre cladding residual pump
During photospallation,
The one section of coat and surrounding layer of the optical fiber laser output end optical fiber are divested first so that the interior bag of this section of optical fiber
Layer is exposed.It can adopt and in various manners divest coat and surrounding layer, such as hot blow mode, machinery divests mode etc., needed herein
Illustrate how to shell anti-surrounding layer and coat not being the innovative point for being this programme, it is therefore, no longer detailed to this progress herein
Repeat.
Punched again using laser beam in exposed inner cladding lateral wall according to default frequency, form several strippings
The interface of groove, the peel groove and inner cladding forms light plane of refraction.The depth of peel groove is less than the thickness of inner cladding.It is in addition, each
The shape of individual peel groove can be with identical.Laser is ultra high frequency laser.Preferably use ultrafast laser light beam of the wavelength for 1064nm
107 punchings.The distributed number of peel groove is optical fiber per cm more than 5.Peel groove is irregular shape.
In addition, the center for several light planes of refraction that described several peel grooves are formed in fiber perpendicular in axial plane
On perspective plane on be uniformly distributed and angle is approximate each other.
Or the center of several light planes of refraction of several peel grooves formation is uniform on shaft axis of optic fibre direction
Distribution.
Or the center of several light planes of refraction of several peel grooves formation is in optical fiber inner cladding naked section
It is uniformly distributed on outer round surface and is covered with the outer round surface.
In addition, the peel groove is from the incident end face of doubly clad optical fiber towards the direction of outgoing end face, according to from dredging to close
Density array distribution, or be uniformly distributed.When i.e. at the beginning, the spacing distance between adjacent peel groove is larger, closer to
The outgoing end face of doubly clad optical fiber, then the spacing distance between adjacent peel groove is smaller, i.e., distribution density is more and more closeer.
The present invention uses ultrafast laser light beam, and the ultrafast laser will not interact in itself with fiber optic materials in itself,
Only in focal spot because sufficiently high peak power destroys fiber cladding structure, the relatively low veiling glare of power is directed through optical fiber
It material, will not be absorbed, be avoided as ultraviolet light beam veiling glare is had an effect with fiber optic materials and then influences optical fiber by fiber optic materials
Material structure changes the consequence brought.
In the present invention, pump light is entered in doubly clad optical fiber, and most of light transmits along fiber core, a part of pumping
Light enters formation covering residual pump light, the covering residual pump light in inner cladding and transmitted in inner cladding, is being not affected by resistance
When hindering, light transmits along fiber core direction.Because doubly clad optical fiber inner cladding periphery has formed peel groove, covering residual pump
Incidence angle of the Pu light light at peel groove 105 Yu the interface of optical fiber inner cladding 103 no longer meets pump light total reflection condition, the covering
Residual pump light is reflected in the peel groove with inner cladding interface, and original transmission direction can not be continued in inner cladding
Advance, be emitted from peel groove 105 is interior to doubly clad optical fiber inner cladding external leakage, avoiding output end face has covering residual pump light
Output, realize the efficient stripping of covering residual pump light.Further, since peel groove is irregular shape, therefore, different enters
When penetrating light and being mapped to the peel groove and inner cladding interface, it can be penetrated with different refraction angles to inner cladding is outgoing, so as to inner cladding
Outer different directions outgoing.
It should be noted that described above is not the restriction to technical solution of the present invention, the wound of the present invention is not being departed from
It is any obviously to replace within protection scope of the present invention on the premise of making design.
Claims (10)
- A kind of 1. optical fiber laser fibre cladding residual pump photospallation method, it is characterised in that the light of the optical fiber laser Fibre includes inner cladding, surrounding layer and coat, and inner cladding is in inside surrounding layer and is outsourced layer cladding, and surrounding layer outer surface is set There is coat and be applied layer cladding；During optical fiber laser fibre cladding residual pump photospallation,The one section of coat and surrounding layer of the optical fiber laser output end optical fiber are divested first so that the interior bag of this section of optical fiber Layer is exposed；Punched again using laser beam in exposed inner cladding lateral wall according to default frequency, form several peel grooves, should The interface of peel groove and inner cladding forms light plane of refraction.
- 2. optical fiber laser covering residual pump photospallation method according to claim 1, it is characterised in that described some The center for several light planes of refraction that individual peel groove is formed is uniformly distributed in fiber perpendicular on the perspective plane on axial plane And angle is approximate each other.
- 3. optical fiber laser covering residual pump photospallation method according to claim 1, it is characterised in that described some The center for several light planes of refraction that individual peel groove is formed is uniformly distributed on shaft axis of optic fibre direction.
- 4. optical fiber laser covering residual pump photospallation method according to claim 1, it is characterised in that described some The center for several light planes of refraction that individual peel groove is formed is uniformly distributed simultaneously on the outer round surface of optical fiber inner cladding naked section It is covered with the outer round surface.
- 5. optical fiber laser covering residual pump photospallation method according to claim 1, it is characterised in that the stripping The depth of groove is less than the thickness of inner cladding.
- 6. optical fiber laser covering residual pump photospallation method according to claim 5, it is characterised in that the stripping Groove is irregular shape.
- 7. optical fiber laser covering residual pump photospallation method according to claim 6, it is characterised in that the stripping Groove is from the incident end face of doubly clad optical fiber towards the direction for being emitted end face, according to from dredging close density array distribution, Huo Zhejun Even distribution.
- 8. optical fiber laser covering residual pump photospallation method according to claim 7, it is characterised in that the laser Light beam is ultra high frequency laser light beam.
- 9. optical fiber laser covering residual pump photospallation method according to claim 7, it is characterised in that described each The shapes and sizes of peel groove are identical.
- 10. optical fiber laser covering residual pump photospallation method according to claim 1, it is characterised in that the stripping Distributed number from groove is optical fiber per cm more than 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710802137.2A CN107508123A (en) | 2017-09-07 | 2017-09-07 | A kind of optical fiber laser fibre cladding residual pump photospallation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710802137.2A CN107508123A (en) | 2017-09-07 | 2017-09-07 | A kind of optical fiber laser fibre cladding residual pump photospallation method |
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| CN107508123A true CN107508123A (en) | 2017-12-22 |
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| CN201710802137.2A Pending CN107508123A (en) | 2017-09-07 | 2017-09-07 | A kind of optical fiber laser fibre cladding residual pump photospallation method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109541750A (en) * | 2018-12-29 | 2019-03-29 | 昆山华辰光电科技有限公司 | The production method and encapsulating structure of optical fiber mode stripper |
| CN115144954A (en) * | 2022-08-31 | 2022-10-04 | 北京凯普林光电科技股份有限公司 | Cladding light stripper and preparation method thereof |
| WO2024078407A1 (en) * | 2022-10-10 | 2024-04-18 | 武汉锐科光纤激光技术股份有限公司 | Optical fiber mode stripper, optical fiber mode stripper preparation method, and laser |
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| CN102255227A (en) * | 2011-04-29 | 2011-11-23 | 中国科学院上海光学精密机械研究所 | Optical fiber cladding light filter and manufacturing method thereof |
| CN103618200A (en) * | 2013-11-29 | 2014-03-05 | 广东高聚激光有限公司 | Pump light stripper for optical fiber laser |
| CN103701023A (en) * | 2013-12-19 | 2014-04-02 | 中国人民解放军国防科学技术大学 | Cladding light filter for double-cladding optical fiber and preparation method for cladding light filter |
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| CN105977774A (en) * | 2016-07-15 | 2016-09-28 | 中国科学院半导体研究所 | Fiber used for laser-mode stripping, and laser-mode stripper applying same |
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2017
- 2017-09-07 CN CN201710802137.2A patent/CN107508123A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102255227A (en) * | 2011-04-29 | 2011-11-23 | 中国科学院上海光学精密机械研究所 | Optical fiber cladding light filter and manufacturing method thereof |
| CN103618200A (en) * | 2013-11-29 | 2014-03-05 | 广东高聚激光有限公司 | Pump light stripper for optical fiber laser |
| CN103701023A (en) * | 2013-12-19 | 2014-04-02 | 中国人民解放军国防科学技术大学 | Cladding light filter for double-cladding optical fiber and preparation method for cladding light filter |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109541750A (en) * | 2018-12-29 | 2019-03-29 | 昆山华辰光电科技有限公司 | The production method and encapsulating structure of optical fiber mode stripper |
| CN115144954A (en) * | 2022-08-31 | 2022-10-04 | 北京凯普林光电科技股份有限公司 | Cladding light stripper and preparation method thereof |
| CN115144954B (en) * | 2022-08-31 | 2023-01-03 | 北京凯普林光电科技股份有限公司 | Cladding light stripper and preparation method thereof |
| WO2024078407A1 (en) * | 2022-10-10 | 2024-04-18 | 武汉锐科光纤激光技术股份有限公司 | Optical fiber mode stripper, optical fiber mode stripper preparation method, and laser |
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Application publication date: 20171222 |