CN107367788A - A kind of large mode field improved multilayer groove optical fiber - Google Patents
A kind of large mode field improved multilayer groove optical fiber Download PDFInfo
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- CN107367788A CN107367788A CN201710857152.7A CN201710857152A CN107367788A CN 107367788 A CN107367788 A CN 107367788A CN 201710857152 A CN201710857152 A CN 201710857152A CN 107367788 A CN107367788 A CN 107367788A
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- groove
- refraction
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02004—Optical fibres with cladding with or without a coating characterised by the core effective area or mode field radius
- G02B6/02009—Large effective area or mode field radius, e.g. to reduce nonlinear effects in single mode fibres
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02295—Microstructured optical fibre
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- Optics & Photonics (AREA)
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Abstract
A kind of improved multilayer groove optical fiber with big mode field area, belongs to large-power optical fiber amplifier, laser, special optical fiber field.The optical fiber, by the increase leakage channel in low-refraction groove, effectively improves the single mode transport characteristic of optical fiber, adds mode field area on the basis of conventional multilayer groove optical fiber.The fiber optic hub is high index of refraction fibre core (1), low-refraction groove is followed successively by from inside to outside and high index of refraction ring is alternately surround, the low-refraction groove number of plies is N (1≤N≤6), and low-refraction groove is split (1≤M≤4) by M leakage channel.Low-refraction groove is divided into (11,21,31,41) from inside to outside ... (16,26,36,46), and outermost is surrounding layer (3).MCVD methods can be utilized to combine drilling by the present invention and the method for filling glass rod is made, the leakage path in preform low-refraction groove, can be realized by laser drill or the method for machine drilling.
Description
Technical field
The present invention relates to a kind of improved multilayer groove optical fiber with big mode field area, belongs to large-power optical fiber amplification
Device, laser, special optical fiber field.
Background technology
With laser technology extensively should in material processing, space communication, laser radar, photoelectronic warfare, laser weapon etc.
With in order to obtain high-power, high quality laser, it is desirable to which single-mode output power reaches MW even GW magnitudes.So as to conversion
The optical fiber laser for the advantages that efficiency high, laser threshold are low, good beam quality is more paid attention to.1988, Snitzer et al.
[Snitzer, E., et al.Double clad, offset core Nd fiber since proposition doubly clad optical fiber
Laser.Optical Fiber Sensors 1988.], quick hair is obtained based on this cladding pumped laser and amplifier
Exhibition.In recent years, with the raising of semiconductor pump laser power and the improvement of pump mode, the output of simple optical fiber laser
Power can reach a kilowatt magnitude.But because single mode active fiber core core diameter only has several microns, by non-linear, structural element, diffraction
Limitation in terms of the physical mechanisms such as the limit, optical damage and fire damage, higher optical power density can not be born.Big mode field area
Optical fiber can be very good to suppress the effects such as non-linear and optical damage.Therefore solves the non-linear effect that launched power lifting faces
Answer and a kind of most directly effective approach for the restricted problems such as optical fiber damages is exactly large mode field optical fiber.2010 it has been reported that
Continuous wave laser [Richardson D.J., the et al.High power fiber lasers of 10kW power:current
status and future perspectives[J].J Opt Soc Am B,2010,27(11):B63-B92.]。2011
Year, Tino Eidam et al. discovery mode shakiness phenomenons are to damage principal element [the Eidam T., et of high power light beam quality
al.Experimental observations of the threshold-like onset of mode
instabilities in high power fiber amplifiers[J].Opt Express,2011,19(14):
13218-24.].The unstable factor of pattern is caused to include optical fibre refractivity change etc. caused by horizontal hole burning, heating, these cause
Higher order mode obtains higher gain.Therefore, suppress higher order mode, keep single mode operation, be to improve high power fiber laser
One of with the important way of amplifier performance.
In these years, many new strong laser fibers have been designed and manufactured.But most strong laser fiber
Have the defects of certain, for example, it is complicated, manufacture difficulty is big, flexural property is poor etc..Because existing manufacturing technology limits, profit
Step index fiber [Li M.-J., Chen X., Liu of the numerical aperture less than 0.05 are difficult to realize with traditional fiber manufacture method
A.,et al.Limit of Effective Area for Single-Mode Operation in Step-Index
Large Mode Area Laser Fibers[J].J Lightwave Technol,2009,27(15):3010-6.].And only
Only with the double clad rare earth doped fiber laser of single mode active fiber core, because single mode active fiber core core diameter is micro- less than or equal to 10
Rice, is limited, the luminous power born is limited, and single mode Active Optical Fiber fibre core is continuous by non-linear, structural element and diffraction limit
Ripple damaging thresholding about 1W/m2[J.Nilsson, J.K.Sahu, Y.Jeong, W.A.Clarkson, R.Selvas,
A.B.Grudinin, and S.U.Alam, " High Power Fiber Lasers：New Developments ",
Proceedings of SPIEVol.4974,50-59 (2003)], dangerous turn into of its optical damage realizes high-power single-mode fiber
A major challenge of laser because heat can also damage optical fiber caused by high-power light, or even can finally melt in addition to optical damage
Chemical fibre core.There is document report, every meter of erbium-ytterbium co-doped fiber laser can produce 100W heat [J.Nilsson, et al. " High-
power and tunable operation of erbium-ytterbium co-doped cladding-pumped
Fiber laser ", IEEE J.Quantum Electron.39,987-994 (2003)].Photonic crystal fiber can be realized super
Big mode field area [Michaille, L.；Bennett, C.R.；Taylor, D.M.；Shepherd, T.J.
" MulticorePhotonic Crystal Fiber Lasers for High Power/Energy Applications ",
IEEE Journalof Selected Topics in Quantum Electronics, 15 (2), 328-336 (2009)], no
Cross it by bending loss to be perplexed, manufacture difficulty is big, cost is high.Multicore optical fiber laser realizes single-mode output, effective mould field
Area can reach 465 μm2[Vogel, Moritz M, Abdou-Ahmed, Marwan, Voss, Andreas, Graf, Thomas,
" Very-large-mode-area, single-mode multicore fiber ", Opt.Lett.34 (18), 2876-2878
(2009)].But the multi-core fiber that this single-mode laser uses, between the core diameter and adjacent fibre core to fiber core away from
From accurate design is needed, small to the admissible error of the distance between fiber core, batch production yield rate is low.Flap optical fiber leads to
Cross and choose specific optical fiber parameter, can realize single mode operation [A.Yeung, K.S.Chiang, V.Rastogi, P.L.Chu,
And G.D.Peng, " Experimental demonstration of single-mode operation of large-
Core segmented cladding fiber, " in Optical Fiber Communication Conference,
Technical Digest (CD) (Optical Society of America, 2004), paper ThI4.].This optical fiber,
Its specific structure is to increase the loss beyond basic mode, realizes and realizes single mode work in optical fiber of the sandwich layer diameter at 50 microns
Make, but the raising of its power is limited to core radius.More groove optical fiber are a kind of novel optical fibers, are surround by multilayer fibre core,
Realize single mode operation [Jain D., Baskiotis C., Sahu J.K.Mode area scaling with multi-
trench rod-type fibers[J].Opt Express,2013,21(2):1448-55.]。
The content of the invention
To overcome existing traditional fiber limited numerical aperture, single-core multiple rare-earth-doped ion region double-clad optical fiber to bear luminous power
Limited, photonic crystal fiber airport manufacture difficulty is big, large mode field single mode multi-core fiber batch production yield rate is low, flap optical fiber
The defects of sandwich layer limited diameter, the present invention propose a kind of improved multilayer groove optical fiber with big mode field area, can be effective
Improve multilayer groove optical fiber unimodular property and increase the mode field area of optical fiber.
According to one example embodiment, there is the improved multilayer groove optical fiber of big mode field area, center is
High index of refraction fibre core, is followed successively by low-refraction groove from inside to outside and high index of refraction ring is alternately surround, the low-refraction groove number of plies
For N, each layer of low-refraction groove is split by M leakage channel, and outermost layer is surrounding layer.The present invention can utilize traditional
MCVD methods and drilling and the method for filling glass rod are made.
Beneficial effects of the present invention are specific as follows：A kind of improved multilayer groove optical fiber with big mode field area, can be real
Existing powerful laser output, by increasing leakage path, can adjust the single-mode output characteristic of optical fiber, can realize that optical fiber is big
Effective core area, the output of high-power single-mode laser can be realized.Due to the presence of leakage channel, so as to be advantageously implemented fibre core
Thermal diffusion, it is effectively improved the heat resistance and unimodular property of optical fiber.
Brief description of the drawings
Referring now to appended figure, what these were not necessarily drawn to scale, and wherein：
Fig. 1 is the sectional view of 1 layer of leakage path multilayer groove optical fiber of groove 1.
Fig. 2 is the sectional view of 1 layer of leakage path multilayer groove optical fiber of groove 4.
Fig. 3 is the sectional view of 3 layers of leakage path multilayer groove optical fiber of groove 4.
Fig. 4 is the sectional view of 6 layers of leakage path multilayer groove optical fiber of groove 1.
Fig. 5 is the sectional view of 6 layers of leakage path multilayer groove optical fiber of groove 2.
Fig. 6 is the sectional view of 6 layers of leakage path multilayer groove optical fiber of groove 3.
Fig. 7 is the sectional view of 6 layers of leakage path multilayer groove optical fiber of groove 4.
Fig. 8 is the foundational model field distribution map of 6 layers of leakage path multilayer groove optical fiber of groove 4.
Fig. 9 is the high-order mode mode distributions figure of 6 layers of leakage path multilayer groove optical fiber of groove 4.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.
Embodiment one
The leakage channel optical fiber of 1 layer of groove of big mode field area modified 1, referring to Fig. 1.The fiber optic hub is high index of refraction core area
(1) first layer low-refraction groove (11), surrounding layer (3), M=1, N=1 in this example, are distributed from inside to outside.
The refractive index of low-refraction groove (11) is less than the refractive index in high index of refraction core area (1)；The refractive index of surrounding layer (3)
Less than the refractive index of low-refraction groove (11).
A diameter of 40 microns of high index of refraction core area (1), the thickness of low-refraction groove is 2 microns, the width of leakage channel
Spend for 6 microns.
Embodiment two
The leakage channel optical fiber of 1 layer of groove of big mode field area modified 4, referring to Fig. 2.The fiber optic hub is high index of refraction core area
(1) first layer low-refraction groove (11,21,31,41), surrounding layer (3), M=4, N=1 in this example, are distributed from inside to outside.
The refractive index of low-refraction groove (11,21,31,41) is less than the refractive index in high index of refraction core area (1)；Surrounding layer
(3) refractive index is less than the refractive index of low-refraction groove (11,21,31,41).
A diameter of 40 microns of high index of refraction core area (1), the thickness of low-refraction groove is 2 microns, the width of leakage channel
Spend for 6 microns.
Embodiment three
The leakage channel optical fiber of 3 layers of groove of big mode field area modified 4, referring to Fig. 3.The fiber optic hub is high index of refraction core area
(1), from inside to outside be distributed first layer low-refraction groove (11,21,31,41), second layer low-refraction groove (12,22,32,
42), third layer low-refraction groove (13,23,33,43), surrounding layer (3), M=4, N=3 in this example.
Low-refraction groove (11,21,31,41), (12,22,32,42), the refractive index of (13,23,33,43) are less than high roll over
The refractive index in She Shuaixin areas (1)；The refractive index of surrounding layer (3) be less than low-refraction groove (11,21,31,41), (12,22,32,
42), the refractive index of (13,23,33,43).
A diameter of 30 microns of high index of refraction core area (1), the thickness of low-refraction groove is 2 microns, low-refraction groove
The distance between be 15 microns, the width of leakage channel is 4 microns.
Example IV
The leakage channel optical fiber of 6 layers of groove of big mode field area modified 1, referring to Fig. 4.The fiber optic hub is high index of refraction core area
(1) first layer low-refraction groove (11), second layer low-refraction groove (12), third layer low-refraction, are distributed from inside to outside
Groove (13), the 4th layer of low-refraction groove (14), layer 5 low-refraction groove (15), layer 6 low-refraction groove
(16), surrounding layer (3), M=1, N=6 in this example.
The refractive index of low-refraction groove (11,12,13,14,15,16) is less than the refractive index in high index of refraction core area (1)；Outside
The refractive index of covering (3) is less than the refractive index of low-refraction groove (11,12,13,14,15,16).
A diameter of 30 microns of high index of refraction core area (1), the thickness of low-refraction groove is 2 microns, low-refraction groove
The distance between be 8 microns, the width of leakage channel is 6 microns.
Embodiment five
The leakage channel optical fiber of 6 layers of groove of big mode field area modified 2, referring to Fig. 5.The fiber optic hub is high index of refraction core area
(1) first layer low-refraction groove (11,21), is distributed from inside to outside, and second layer low-refraction groove (12,22), third layer is low
Refractive index groove (13,23), the 4th layer of low-refraction groove (14,24), layer 5 low-refraction groove (15,25), layer 6
Low-refraction groove (16,26), surrounding layer (3), M=2, N=6 in this example.
Low-refraction groove (11,21), (12,22), (13,23), (14,24), (15,25), the refractive index of (16,26) are small
Refractive index in high index of refraction core area (1)；The refractive index of surrounding layer (3) be less than low-refraction groove (11,21), (12,22),
(13,23), (14,24), (15,25), the refractive index of (16,26).
A diameter of 30 microns of high index of refraction core area (1), the thickness of low-refraction groove is 2 microns, low-refraction groove
The distance between be 8 microns, the width of leakage channel is 4 microns.
Embodiment six
The leakage channel optical fiber of 6 layers of groove of big mode field area modified 3, referring to Fig. 6.The fiber optic hub is high index of refraction core area
(1), it is distributed first layer low-refraction groove (11,21,31) from inside to outside, second layer low-refraction groove (12,22,32), the
Three layers of low-refraction groove (13,23,33), the 4th layer of low-refraction groove (14,24,34), layer 5 low-refraction groove
(15,25,35), layer 6 low-refraction groove (16,26,36), surrounding layer (3), M=3, N=6 in this example.
Low-refraction groove (11,21,31), (12,22,32), (13,23,33), (14,24,34), (15,25,35),
The refractive index of (16,26,36) is less than the refractive index in high index of refraction core area (1)；The refractive index of surrounding layer (3) is less than low-refraction ditch
Groove (11,21,31), (12,22,32), (13,23,33), (14,24,34), (15,25,35), the refractive index of (16,26,36).
A diameter of 30 microns of high index of refraction core area (1), the thickness of low-refraction groove is 2 microns, low-refraction groove
The distance between be 8 microns, the width of leakage channel is 6 microns.
Embodiment seven
The leakage channel optical fiber of 6 layers of groove of big mode field area modified 4, referring to Fig. 7 -- 9.The fiber optic hub is high index of refraction
Core area (1), from inside to outside be distributed first layer low-refraction groove (11,21,31,41), second layer low-refraction groove (12,22,
32nd, 42), third layer low-refraction groove (13,23,33,43), the 4th layer of low-refraction groove (14,24,34,44), layer 5
Low-refraction groove (15,25,35,45), layer 6 low-refraction groove (16,26,36,46), surrounding layer (3), M in this example
=4, N=6.
Low-refraction groove (11,21,31,41), (12,22,32,42), (13,23,33,43), (14,24,34,44),
The refractive index of (15,25,35,45), (16,26,36,46) is less than the refractive index in high index of refraction core area (1)；The folding of surrounding layer (3)
Penetrate rate less than low-refraction groove (11,21,31,41), (12,22,32,42), (13,23,33,43), (14,24,34,44),
(15,25,35,45), the refractive index of (16,26,36,46).
A diameter of 30 microns of high index of refraction core area (1), the thickness of low-refraction groove is 2 microns, low-refraction groove
The distance between be 8 microns, the width of leakage channel is 6 microns.
Fig. 8 is the field distribution of Fig. 7 optical fiber basic modes.
Fig. 9 is the field distribution of Fig. 7 optical fiber high-order modes.
Claims (3)
1. a kind of improved multilayer groove optical fiber with big mode field area, it is characterized in that：The fiber optic hub is that high index of refraction is fine
The low-refraction groove of core (1), from inside to outside distribution M × N number of compromised channel segmentation, (11,21 ... ..., M1), (12,
22 ... ..., M2) ..., (1N, 2N ... ..., MN), outermost is surrounding layer (3)；Wherein 1≤N≤6,1≤M≤4.
2. optical fiber according to claim 1, it is characterized in that：Low-refraction groove (11,21 ..., M1), (12,
22 ..., M2) ..., the refractive index of (1N, 2N ..., MN) it is equal.The refractive index of high index of refraction fibre core (1) is more than low folding
Penetrate rate groove (11,21 ... ..., M1), (12,22 ... ..., M2) ..., the refractive index of (1N, 2N ... ..., MN), more than outsourcing
The refractive index of layer (3).
3. optical fiber according to claim 1, it is characterized in that：All low-refraction groove thickness are equal, all low-refractions
The distance between groove is equal, and the width of all leakage channels is equal.Wherein core diameter is less than 50 microns, low-refraction groove
Thickness is more than 1 micron and is less than 3 microns, and the distance between low-refraction groove is more than 5 microns and is less than 20 microns, the width of leakage channel
Degree is more than 1 micron and is less than 10 microns.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024125462A1 (en) * | 2022-12-16 | 2024-06-20 | 中国移动通信有限公司研究院 | Optical fiber |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003019257A1 (en) * | 2001-08-30 | 2003-03-06 | Crystal Fibre A/S | Optical fibre with high numerical aperture, method of its production, and use thereof |
| WO2004053550A1 (en) * | 2002-12-09 | 2004-06-24 | Crystal Fibre A/S | Improvements relating to photonic crystal fibres |
| CN101021590A (en) * | 2007-02-07 | 2007-08-22 | 燕山大学 | Optical fiber capable of effectively transmitting 2-3 um wavelength |
| CN101403808A (en) * | 2007-06-15 | 2009-04-08 | 古河电子北美公司 | Bend insensitivity in single mode optical fibers |
| CN103293594A (en) * | 2013-06-28 | 2013-09-11 | 中国科学院西安光学精密机械研究所 | Large-mode-field quartz energy transmission optical fiber |
-
2017
- 2017-09-20 CN CN201710857152.7A patent/CN107367788A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003019257A1 (en) * | 2001-08-30 | 2003-03-06 | Crystal Fibre A/S | Optical fibre with high numerical aperture, method of its production, and use thereof |
| WO2004053550A1 (en) * | 2002-12-09 | 2004-06-24 | Crystal Fibre A/S | Improvements relating to photonic crystal fibres |
| CN101021590A (en) * | 2007-02-07 | 2007-08-22 | 燕山大学 | Optical fiber capable of effectively transmitting 2-3 um wavelength |
| CN101403808A (en) * | 2007-06-15 | 2009-04-08 | 古河电子北美公司 | Bend insensitivity in single mode optical fibers |
| CN103293594A (en) * | 2013-06-28 | 2013-09-11 | 中国科学院西安光学精密机械研究所 | Large-mode-field quartz energy transmission optical fiber |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024125462A1 (en) * | 2022-12-16 | 2024-06-20 | 中国移动通信有限公司研究院 | Optical fiber |
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