CN105826802B - A kind of cladding light stripper and preparation method thereof for optical fiber laser - Google Patents
A kind of cladding light stripper and preparation method thereof for optical fiber laser Download PDFInfo
- Publication number
- CN105826802B CN105826802B CN201610325257.3A CN201610325257A CN105826802B CN 105826802 B CN105826802 B CN 105826802B CN 201610325257 A CN201610325257 A CN 201610325257A CN 105826802 B CN105826802 B CN 105826802B
- Authority
- CN
- China
- Prior art keywords
- grating
- optical fiber
- refractive index
- inner cladding
- light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- 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
- H01S3/05—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
- H01S3/0675—Resonators including a grating structure, e.g. distributed Bragg reflectors [DBR] or distributed feedback [DFB] fibre lasers
Abstract
The cladding light stripper and preparation method thereof that the invention discloses a kind of for optical fiber laser, the stripper includes cladded-fiber, multistage grating and cooling pipe sleeve, its production method is the ultraviolet photoresist for coating refractive index on exposed optical fiber inner cladding outer surface and being greater than or equal to inner cladding refractive index, then multistage grating is etched on ultraviolet photoresist, is stripped out residual light in inner cladding by multistage grating diffration；The multistage grating made is sleeved in metal tube, sealing shroud is used in combination to seal, which is paved with heat-absorbing material, and the inner cladding light absorption that will be separated, the cooling water for being passed through circulation takes away the heat of generation.The present invention adjusts the transmitance of cladding light by using the grating of different structure, achievees the purpose that efficient uniform is removed, avoids stripper from heat spot occur, ensure the high reliability of optical fiber.The present invention has the characteristics that simple in structure, applicability is wide, reliability is high.
Description
Technical field
Patent of the present invention belongs to optical fiber laser field, is related to a kind of covering residual light for high-capacity optical fiber laser
Device of stripping and preparation method thereof.
Background technology
In recent years, with the continuous development of high-capacity optical fiber laser, the power of optical fiber laser is constantly soaring, high power
Optical fiber laser has become a kind of widely used industrial processes laser, to the stability of its beam quality and system
It is required that also more stringent.
In fiber ring laser system, due to the influence of nonlinear effect, the long enough that gain fibre cannot be done, this is directly
It results in and has remained certain pump light in the inner cladding of doubly clad optical fiber, in high-capacity optical fiber laser, this power can
To reach hectowatt grade, in addition to this also gain fibre work when generate spontaneous emission light (ASE) and fused fiber splice when let out
Reveal the signal light of optical fiber inner cladding.These residual lights are transmitted in optical fiber inner cladding, if be not stripped clean, will reduce optical fiber
The beam quality of laser generates prodigious harm to the device in link behind fiber laser system.
The inner cladding residual light of doubly clad optical fiber divests, and most straightforward approach is directly to be coated on exposed inner cladding
Height refraction ultraviolet glue, the photoresist of inner cladding refractive index is more than due to being coated with refractive index, is destroyed in optical fiber between surrounding layer
The condition of total reflection and so that inner cladding light is revealed, to export remaining light energy from inner cladding.But such method is due to covering
The mutation of structure, a large amount of light can be leaked out in the front end of stripper, generated a large amount of heat, usually made the temperature mistake of front end
Height, the performance to significantly limit cladding light stripper propose step raising.
Invention content
The present invention provides one kind for optical fiber laser covering stripper and preparation method thereof, it is intended to realize optical fiber and swash
In light device covering light efficient uniform stripping purpose, solve covering in high-power residual light concentrated in stripper leakage,
There are the technical problems such as heat spot, further increases the performance of optical fiber laser covering stripper.
Covering stripper technical solution proposed by the present invention, including doubly clad optical fiber, which is characterized in that further include multistage light
Grid and cooling pipe sleeve；Wherein：
The doubly clad optical fiber is doubly clad optical fiber, including fibre core, inner cladding, surrounding layer and coat；
The multistage grating is in optical fiber interval or continuous arrangement；Each section of grating is in the naked of the doubly clad optical fiber for peelling off surrounding layer
Reveal inner cladding outer surface circumferentially；The grating is by circumferentially coating a layer thickness in optical fiber inner cladding outer surface
400-600 μm of high-index material forms；The high-index material is that refractive index is reflected more than or equal to optical fiber inner cladding
The ultraviolet photoresist of rate.
The cooling pipe sleeve is hollow metal sleeve, and managing interior circulation has deionization cooling water, for will be led at each section of grating
The light energy gone out is taken away；
The doubly clad optical fiber is from cooling pipe sleeve axially across being to make to have multistage grating in cooling collar inside points
Doubly clad optical fiber；
The junction of cooling collar and doubly clad optical fiber is equipped with sealing shroud, for preventing derived cladding light from leaking and
The spilling of cooling water.
Further, there is each section of grating different screen periods, depth or duty ratio, axial section pattern can be
Rectangular raster, sinusoidal grating or triangular grating；In the multistage grating, each section of grating is not of uniform size to the transmitance of light,
The sequence for specifically pressing the internal ascending arrangement of covering light transmission rate determines.By adjusting screen periods, depth and duty ratio this
Three parameters influence grating diffraction efficiency at different levels, to change the transmitance of inner cladding light.
Further, the fiber core refractive index of the doubly clad optical fiber is more than the refractive index of inner cladding, the refractive index of inner cladding
More than the refractive index of surrounding layer, the refractive index of surrounding layer is less than the refractive index of coat.
Further, the grating quantity of the multistage grating is 3-10.
Further, the grid ridge refractive index of each section of grating is identical as the refractive index of grating substrate, the refractive index of the two
More than or equal to the refractive index of optical fiber inner cladding.
Further, the ultraviolet photoresist coated on the exposed inner cladding is that refractive index is rolled over more than or equal to inner cladding
Penetrate the translucent material of rate.
Further, the cooling collar inner wall be equipped with internal cladding light have high-selenium corn material, including graphite, copper or
The aluminium of anodization.
Further, the high-index material thickness that optical fiber inner cladding outer surface circumferentially coats is 500 μm.
Correspondingly, the present invention also proposes a kind of covering stripper production method of optical fiber laser, includes the following steps：：
(1) coat of one segment length of doubly clad optical fiber and surrounding layer are removed, in the appearance of doubly clad optical fiber inner cladding
Face, coating refractive index are greater than or equal to the ultraviolet photoresist of inner cladding refractive index；
(2) grating diffration efficiency is calculated, by parameters such as period, depth, the duty ratios of change grating, to adjust grating
Diffraction efficiency, selecting multistage parameter, different (difference of different three parameters of grating for being exactly the foregoing description, parameter is not
Together, grating diffration efficiency is therefore different), the grating parameter that diffraction efficiency does not wait from small to large separates interior packet to control
The ratio of layer light；Using ultraviolet photoresist good coated by litho machine etching (1), the different light of designed multistage parameter is obtained
Grid and grating substrate；Period, depth, duty ratio these three parameters are to influence the principal element of efficiency, can be selected according to actual conditions
It takes and which parameter is preferentially adjusted；Rigorous couple-wave analysis method can be used in grating diffration efficiency calculation；
(3) by step (2) obtained doubly clad optical fiber from cooling pipe sleeve axially across being passed through cycle in cooling collar
The deionization cooling water of flowing, in the junction of cooling collar and doubly clad optical fiber, setting sealing is covered to prevent derived packet
Layer light leaks and the spilling of cooling water.
In the present invention, the residual light in doubly clad optical fiber inner cladding can be generated through grating substrate by multistage optical grating diffraction
Different diffraction times and different transmitances, are gradually coupled out optical fiber inner cladding, are absorbed by the absorbing material of metal pipe-wall, lead to
The cooling water crossed in metal tube takes away the heat of generation.
The present invention can adjust grating to optical fiber inner cladding as a result of multistage grating by changing the structure of grating
The transmitance of residual light, therefore using the multistage grating of different structure, it is convenient to it controls different location and separates packet in optical fiber
The watt level of layer residual light achievees the purpose that efficient uniform is removed, avoids occurring heat spot in stripper, ensure the height of optical fiber
Reliability improves the ability of stripper.
Description of the drawings
Fig. 1 is the structural schematic diagram of the cladding light stripper of optical fiber laser of the present invention；
Fig. 2 is section pattern schematic diagram used by grating in the cladding light stripper of optical fiber laser of the present invention；
Fig. 3 is the implementation illustration of the cladding light stripper of optical fiber laser of the present invention.
In all the appended drawings, identical reference numeral is used for indicating identical element or structure, wherein：1-double clad light
Fibre, 2-inner claddings, 3-metal tubes, 4-grating substrates, 5-multistage gratings, 6-absorbers, 7-surrounding layers and coat,
8-sealing shrouds, 9-grating grid ridges, 10-CO2 lasers, 11-photo-couplers, 12-thermal cameras, 13-covering photospallations
Device, 14-light power meters.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
It does not constitute a conflict with each other and can be combined with each other.
The present invention is further detailed below in conjunction with attached drawing, but should not be limited the scope of the invention with this.
With reference to Figure of description, Fig. 1 is the overall structure diagram of the present invention, as shown, the cladding light stripping of the present invention
It is characterized in that including doubly clad optical fiber, multistage grating and cooling pipe sleeve from device, doubly clad optical fiber therein is common double-contracting
Layer optical fiber；Multistage grating is in optical fiber interval or continuous arrangement；Each section of grating is in the exposed interior of the doubly clad optical fiber for peelling off surrounding layer
Covering outer surface is circumferentially；The grating in optical fiber inner cladding outer surface by circumferentially coating high-index material
At；Doubly clad optical fiber inner cladding residual light can generate the transmission arranged from small to large through grating substrate by multistage optical grating diffraction
Inner cladding residual light is equably coupled out optical fiber inner cladding by rate；Cooling pipe sleeve is hollow metal sleeve, manage in circulation have from
Sub- cooling water, for taking away light energy derived from each section of grating；The doubly clad optical fiber from cooling pipe sleeve axially across,
It is to make the doubly clad optical fiber for having multistage grating in cooling collar inside points；The junction of cooling collar and doubly clad optical fiber, if
There is sealing shroud, for preventing derived cladding light from leaking and the spilling of cooling water.
The production method of the cladding light stripper includes the following steps：
(1) coat and surrounding layer that one segment length of the doubly clad optical fiber of selection is 15cm are divested, exposes optical fiber
Inner cladding；
(2) grating diffration efficiency is calculated, by parameters such as period, depth, the duty ratios of change grating, to adjust grating
Diffraction efficiency, select that multistage parameter is different, diffraction efficiency not equal grating parameter from small to large, in controlling and separate
The ratio of cladding light.Three sections of different gratings of parameter are had chosen in the present embodiment, the grating of selection is rectangular raster, as Fig. 2 is
The diagrammatic cross-section of grating, the wherein period of grating one, depth and duty ratio are respectively the week of (5 μm, 2 μm, 0.5), grating two
Phase, depth and duty ratio are respectively the period of (10 μm, 2 μm, 0.5), grating three, depth and duty ratio be respectively (15 μm, 2 μm,
0.5), in the present embodiment, can achieve the purpose that change diffraction efficiency of grating by changing screen periods, in order to simplify
Bright problem, does not change depth and duty ratio.Using rigorous couple-wave analysis method, the transmitance that three is calculated is to be respectively
0.3,0.5,0.7, it is arranged in order grating one, grating two, grating three by the transmission direction of doubly clad optical fiber inner cladding light.Exposed
Inner cladding on coating ultraviolet light photoresist, obtain designed multistage grating using litho machine etching photoresist, or will etching
Good multistage grating is adhered on exposed inner cladding.
(3) optical fiber and grating made abovementioned steps, are entangled and are sealed with metal tube, pass to cooling water.
Embodiment：Fig. 2 is the implementation illustration of the doubly clad optical fiber inner cladding photospallation device of the present invention, as shown, this hair
The core diameter of the bright output end applied to high-capacity optical fiber laser, used doubly clad optical fiber 13 is 20 μm, inner cladding
It is 400 μm.The laser that 100 watts of wavelength 915nm is sent out by semiconductor laser elements 11 is coupled by photo-coupler 12
Doubly clad optical fiber 13 is come out inner cladding photospallation by the cladding light stripper 15 made, and 20 DEG C are passed in metal pipe mouth
Cooling water, flow is more than 1 liter/min, cladding light stripper made to cool down, monitored with thermal camera 14 and power detection meter 16
Whole process.Experiment shows that the case where double clad fiber cladding photospallation device does not overheat, temperature are no more than 40 DEG C, packet
The layer luminous power overwhelming majority is stripped out covering, and peeling effect reaches 10dB or more.
The present invention can adjust grating to covering residual light as a result of multistage grating by changing the structure of grating
Transmitance, therefore can easily control different location using the multistage grating of different structure and separate optical fiber inner cladding residual light
Watt level, achieve the purpose that efficient uniform remove, avoid occurring heat spot in stripper, ensure the high reliability of optical fiber,
Have the characteristics that simple in structure, applicability is wide, reliability is high.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, all within the spirits and principles of the present invention made by all any modification, equivalent and improvement etc., should all include
Within protection scope of the present invention.
Claims (10)
1. a kind of cladding light stripper for optical fiber laser, including doubly clad optical fiber, which is characterized in that further include multistage light
Grid and cooling pipe sleeve；Wherein：
The doubly clad optical fiber is doubly clad optical fiber, including fibre core, inner cladding, surrounding layer and coat；
The multistage grating is in optical fiber interval or continuous arrangement；Each section of grating is in the exposed interior of the doubly clad optical fiber for peelling off surrounding layer
Covering outer surface is circumferentially；The grating is 400- by circumferentially coating a layer thickness in optical fiber inner cladding outer surface
600 μm of high-index material forms；The high-index material is that refractive index is greater than or equal to optical fiber inner cladding refractive index
Ultraviolet photoresist；
The cooling pipe sleeve is hollow metal sleeve, manage in circulation have deionization cooling water, for will be derived from each section of grating
Light energy is taken away；
The doubly clad optical fiber is from cooling pipe sleeve axially across being to make the double-contracting for having multistage grating in cooling collar inside points
Layer optical fiber；
The junction of cooling collar and doubly clad optical fiber is equipped with sealing shroud, for preventing derived cladding light from leaking and cooling down
The spilling of water.
2. photospallation device as described in claim 1, which is characterized in that each section of grating have different screen periods, depth or
Duty ratio, axial section pattern can be rectangular raster, sinusoidal grating or triangular grating；In the multistage grating, respectively
Section grating is not of uniform size to the transmitance of light, and the sequence for specifically pressing the internal ascending arrangement of covering light transmission rate determines.
3. photospallation device as claimed in claim 1 or 2, which is characterized in that the fiber core refractive index of the doubly clad optical fiber is more than
The refractive index of inner cladding, the refractive index of inner cladding are more than the refractive index of surrounding layer, and the refractive index of surrounding layer is less than the folding of coat
Penetrate rate.
4. photospallation device as claimed in claim 1 or 2, which is characterized in that the grating quantity of the multistage grating is 3-10.
5. photospallation device as claimed in claim 1 or 2, which is characterized in that each section of grating can be that sub-wave length grating can also
It is non-sub-wave length grating.
6. photospallation device as claimed in claim 1 or 2, which is characterized in that the grid ridge refractive index and grating substrate of each section of grating
Refractive index it is identical, the refractive index of the two is greater than or equal to the refractive index of optical fiber inner cladding.
7. photospallation device as claimed in claim 1 or 2, which is characterized in that the ultraviolet photoresist coated on exposed inner cladding
It is greater than or equal to the translucent material of inner cladding refractive index for refractive index.
8. photospallation device as claimed in claim 1 or 2, which is characterized in that the cooling collar inner wall is equipped with internal cladding light
Material with high-selenium corn, including graphite, copper or the aluminium of anodization.
9. photospallation device as claimed in claim 1 or 2, which is characterized in that optical fiber inner cladding outer surface circumferentially coats
High-index material thickness be 500 μm.
10. a kind of covering stripper production method of optical fiber laser, includes the following steps：
(1) coat of one segment length of doubly clad optical fiber and surrounding layer are removed, in the outer surface of doubly clad optical fiber inner cladding, is applied
Cover the ultraviolet photoresist that refractive index is greater than or equal to inner cladding refractive index；
(2) grating diffration efficiency is calculated, by these three parameters of period, depth and the duty ratio of change grating, to adjust light
The diffraction efficiency of grid selects the grating parameter that multistage parameter is different, and diffraction efficiency does not wait from small to large, is separated to control
The ratio of inner cladding light；Using ultraviolet photoresist good coated by litho machine etching (1), it is different to obtain designed multistage parameter
Grating and grating substrate；
(3) by step (2) obtained doubly clad optical fiber from cooling pipe sleeve axially across being passed through and circulate in cooling collar
Deionization cooling water, in the junction of cooling collar and doubly clad optical fiber, setting sealing set is to prevent derived cladding light
It leaks and the spilling of cooling water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610325257.3A CN105826802B (en) | 2016-05-17 | 2016-05-17 | A kind of cladding light stripper and preparation method thereof for optical fiber laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610325257.3A CN105826802B (en) | 2016-05-17 | 2016-05-17 | A kind of cladding light stripper and preparation method thereof for optical fiber laser |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105826802A CN105826802A (en) | 2016-08-03 |
| CN105826802B true CN105826802B (en) | 2018-08-21 |
Family
ID=56529831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610325257.3A Expired - Fee Related CN105826802B (en) | 2016-05-17 | 2016-05-17 | A kind of cladding light stripper and preparation method thereof for optical fiber laser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105826802B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107453192B (en) * | 2017-08-09 | 2019-09-27 | 西南技术物理研究所 | A kind of high-capacity optical fiber laser liquid cooling heat radiation system |
| CN109921270A (en) * | 2019-05-06 | 2019-06-21 | 中国工程物理研究院激光聚变研究中心 | A kind of covering power device for stripping and laser |
| CN110808527A (en) * | 2019-10-31 | 2020-02-18 | 武汉锐科光纤激光技术股份有限公司 | Cladding light stripping device and processing method thereof |
| CN111029891A (en) * | 2020-01-10 | 2020-04-17 | 华东师范大学重庆研究院 | Laser gain optical fiber heat dissipation device |
| CN111854962A (en) * | 2020-06-08 | 2020-10-30 | 浙江大华技术股份有限公司 | Thermal imaging human body temperature measurement method, device and system and electronic equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102208741A (en) * | 2011-04-17 | 2011-10-05 | 伍峰 | Efficient residual pumping light attenuation method |
| CN102255227A (en) * | 2011-04-29 | 2011-11-23 | 中国科学院上海光学精密机械研究所 | Fiber cladding light filter and manufacturing method thereof |
| CN103490273A (en) * | 2013-10-10 | 2014-01-01 | 武汉锐科光纤激光器技术有限责任公司 | High-power optical fiber transmission system |
| CN105204117A (en) * | 2015-09-29 | 2015-12-30 | 北京航天控制仪器研究所 | High-power double-clad optical fiber cladding light stripper device and manufacturing method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8433161B2 (en) * | 2010-09-21 | 2013-04-30 | Textron Systems Corporation | All glass fiber laser cladding mode stripper |
| JP6420163B2 (en) * | 2014-07-16 | 2018-11-07 | 三菱電線工業株式会社 | Optical fiber core and laser transmission component including the same |
-
2016
- 2016-05-17 CN CN201610325257.3A patent/CN105826802B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102208741A (en) * | 2011-04-17 | 2011-10-05 | 伍峰 | Efficient residual pumping light attenuation method |
| CN102255227A (en) * | 2011-04-29 | 2011-11-23 | 中国科学院上海光学精密机械研究所 | Fiber cladding light filter and manufacturing method thereof |
| CN103490273A (en) * | 2013-10-10 | 2014-01-01 | 武汉锐科光纤激光器技术有限责任公司 | High-power optical fiber transmission system |
| CN105204117A (en) * | 2015-09-29 | 2015-12-30 | 北京航天控制仪器研究所 | High-power double-clad optical fiber cladding light stripper device and manufacturing method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105826802A (en) | 2016-08-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105826802B (en) | A kind of cladding light stripper and preparation method thereof for optical fiber laser | |
| CN103904535B (en) | Cladding light filtering device for high-power optical fiber laser | |
| US8433161B2 (en) | All glass fiber laser cladding mode stripper | |
| CN102255227B (en) | Fiber cladding light filter and manufacturing method thereof | |
| CN205333909U (en) | Coating film type covering luminous power stripper | |
| WO2020259643A1 (en) | Triple-clad fiber, pump combiner, fiber grating, and fiber laser | |
| CN105449499B (en) | A kind of fibre cladding light filtering method using waveguide capillary | |
| US20120068206A1 (en) | Close-packed array of light emitting devices | |
| CN105204117B (en) | A kind of high-power double cladding fibre cladding photospallation device device and production method | |
| CN204758864U (en) | High power fiber cladding power strips and scattered light suppression device dorsad | |
| CN105659125A (en) | Spatially modulated cladding mode stripper and optical fiber therewith | |
| CN101359803A (en) | Optical fiber for optical laser, its manufacuture method and optical laser | |
| JP2022522371A (en) | Photonic crystal fiber, its preform, manufacturing method and use | |
| US20150286007A1 (en) | High Power Optical Fiber Ends | |
| CN109768459A (en) | A kind of pump light stripper of laser ablation and preparation method thereof | |
| CN104880764A (en) | Method of removing cladding light, optical fiber and manufacturing method thereof | |
| WO2020259642A1 (en) | Triple-clad active optical fibre, optical amplification structure, and optical fibre laser | |
| CN104865638A (en) | Method for leaking cladding light in double-clad optical fiber | |
| CN110165531A (en) | A kind of large mode field triple clad passive fiber, mode stripper and optical fiber laser | |
| CN107037538A (en) | A kind of fibre cladding power stripper and its manufacture method | |
| CN107092054A (en) | A kind of Active Optical Fiber fusion connection point protection device and method | |
| CN208423447U (en) | A kind of high-capacity optical fiber laser pump light device for stripping | |
| CN110361809A (en) | Optical fiber, fibre cladding power stripper, optical fiber laser and method for preparing optical fiber | |
| CN107561641B (en) | Optical fiber cladding high-power stripping combination device and stripping method | |
| CN212160138U (en) | Optical fiber, optical fiber cladding power filter and optical fiber laser |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180821 Termination date: 20200517 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |