CN106405727A - Thermal deformation mode-based hollow double-core long-period fiber grating fabrication method - Google Patents
Thermal deformation mode-based hollow double-core long-period fiber grating fabrication method Download PDFInfo
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- CN106405727A CN106405727A CN201610984672.XA CN201610984672A CN106405727A CN 106405727 A CN106405727 A CN 106405727A CN 201610984672 A CN201610984672 A CN 201610984672A CN 106405727 A CN106405727 A CN 106405727A
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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
- G02B6/02057—Optical fibres with cladding with or without a coating comprising gratings
- G02B6/02076—Refractive index modulation gratings, e.g. Bragg gratings
- G02B6/02123—Refractive index modulation gratings, e.g. Bragg gratings characterised by the method of manufacture of the grating
- G02B6/02128—Internal inscription, i.e. grating written by light propagating within the fibre, e.g. "self-induced"
-
- 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
- G02B6/02057—Optical fibres with cladding with or without a coating comprising gratings
- G02B6/02076—Refractive index modulation gratings, e.g. Bragg gratings
- G02B6/02195—Refractive index modulation gratings, e.g. Bragg gratings characterised by means for tuning the grating
- G02B6/02204—Refractive index modulation gratings, e.g. Bragg gratings characterised by means for tuning the grating using thermal effects, e.g. heating or cooling of a temperature sensitive mounting body
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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
- G02B6/032—Optical fibres with cladding with or without a coating with non solid core or cladding
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Abstract
The present invention belongs to the optical fiber communication and optical fiber sensing technical field and relates to a thermal deformation mode-based hollow double-core long-period fiber grating fabrication method. The method includes the following steps that: (1) the hollow double-core optical fiber coating layer of a grating to be fabricated is removed, and an obtained hollow double-core optical fiber is fixed through an optical fiber fixture; (2) air inflation or air extraction is performed on the hollow double-core optical fiber, so that the internal air pressure of the optical fiber can be greater than or smaller than external air pressure; (3) the optical fiber is heated for 2s by using a heating component, so that the optical fiber can expand outwards or collapses inwards; (4) a displacement platform is controlled to make the optical fiber move 1mm towards the same direction, and the optical fiber is heated again for 2s; and (5) the step (3) and the step (4) are repeated, so that a periodic structure can be realized, and the fabrication of the long-period fiber grating is realized. According to the method of the invention, only three operation steps, namely, inflation or air extraction, heating or horizontal back-front movement of the optical fiber are adopted, and therefore, the problem of complicated operation of the precise alignment o laser pulses and an optical fiber of an existing fiber grating fabrication method can be avoided.
Description
Technical field
The invention belongs to fiber optic communication and technical field of optical fiber sensing are and in particular to a kind of hollow based on thermal deformation mode
Twin-core LPFG wiring method.
Background technology
Fiber grating is to form permanent refractive index periodically variable optical fiber device by certain method in fiber core
Part., because its insertion loss is low, back-reflection is little, its transmission characteristic is to temperature, strain, ambient refractive index etc. for LPFG
Many factors change all more sensitive advantages of ratio, are widely used in communication and sensory field of optic fibre.
Hollow twin-core fiber is to be made up of fibre core, annular covering and air chamber.Air chamber is located in the middle of annular covering, fibre core
Positioned at covering air intracavity, melt and be embedded on annular covering inwall.The concept of this structured optical fiber was suggested early in 1976
(United States Patent (USP) NO.3950073).
LPFG wiring method main at present has amplitude mask method and the laser pulse pointwise of Ultra-Violet Laser
Wrting method.
Chinese patent (CN101825740, CN 101776780) is the Ultra-Violet Laser using 248nm, is being shaken by one piece
Being irradiated to after width mask plate on the optical fiber carrying hydrogen or germnium doped fiber, thus forever changing fiber core refractive index, making long period optical fiber
Grating.This method has larger motility, and the refractive index modulation structure of grating can be arbitrarily designed making, but its
Shortcoming is not can manufacture.When making grating in this way, using the germanium-doped silica fiber with heliosensitivity, the light of formation
Grid heat stability is poor.Using the optical fiber carrying hydrogen, must be annealed to eliminate the labile element in grating after write grating, because
This grating high cost so making but efficiency is low.
Chinese patent (CN101840019, CN03111552.7) adopts 10.6 μm of CO2Laser pulse pointwise write long week
The method of phase fiber grating, the advantage of this method is that motility is high, using ordinary optic fibre it is not necessary to carry hydrogen, without mask plate, week
Phase is easily controlled, and light source coherence is not required.Shortcoming is CO2Laser pulse needs accurately to be aligned with fibre core, and needs
Accurate motion control mechanism, needs multiple alignment function for twin-core fiber, and complex operation is inefficient.
Chinese research personnel adopt the CO of 50 μm of focal beam spot diameter2Laser pulse writes LPFG, used
To be similarly hollow twin-core fiber.Shortcoming is the Exit positions needing to be aligned laser, CO2The focussing plane of laser pulse need to be with
The plane precise perpendicularity of twin-core composition, simultaneously need to be precisely controlled to fiber spinning angle, complex operation, complex structure
(Tingting Yuan,Xing Zhong,Chunying Guan,*Jianan Fu,Jing Yang,Jinhui Shi,and
Libo Yuan,Long period fiber grating in two-core hollow eccentric fiber,Optics
Express,Vol.23,No.26).
Content of the invention
It is an object of the invention to provide a kind of hollow twin-core LPFG write side based on thermal deformation mode
Method.
The object of the present invention is achieved like this：
A kind of hollow twin-core LPFG wiring method based on thermal deformation mode, comprises the steps：
(1) the hollow twin-core fiber coat of one section of grating to be written is removed, and fixed with fiber clamp；
(2) to hollow twin-core fiber inner inflatable or pumping, inside of optical fibre air pressure is made to be more than or less than ambient pressure；
(3) utilize heating element heats 2s, make optical fiber outward expansion or inwardly collapse；
(4) optical fiber is moved 1mm to same direction by command displacement platform, again heats to optical fiber, is 2s heat time heating time；
(5) repeat step (3), (4) obtain periodic structure, realize the write of LPFG.
Described hollow twin-core fiber is made up of two fiber cores, annular covering and air chamber；For sky in the middle of annular covering
Air cavity, two fiber cores are located in covering air chamber, melt and are embedded in annular covering inwall and are symmetric.
Described hollow twin-core fiber inner inflatable, to optical fiber heating, obtain is the long period optical fiber of convex-type structure
Grating.
Described to hollow twin-core fiber internal air exhausting, to optical fiber heating, optical fiber is heated and collapses, and obtain is umbilicate type knot
The LPFG of structure.
The beneficial effects of the present invention is：
Mode of operation of the present invention is easily realized it is only necessary to control heat time heating time, power and optical fiber to move forward and backward distance.Become grid
Apparatus structure is simple, and only inflation (pumping), heating and movable three operating procedures of optical fiber of level, therefore avoid with
Toward the laser pulse the writing grid method problem loaded down with trivial details with the accurate alignment function of optical fiber.
Brief description
Fig. 1 twin-core hollow optical fiber cross-sectional structure schematic diagram.
The double M type heating element structure schematic diagram of Fig. 2.
Fig. 3 (a) twin-core hollow optical fiber produces deformation map due to thermal expansion.
Fig. 3 (b) twin-core hollow optical fiber is collapsed generation deformation map due to heat.
The writing station schematic diagram of Fig. 4 hollow twin-core LPFG.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is described in more detail：
The present invention provides a kind of hollow twin-core LPFG wiring method based on thermal deformation mode.(1) by one
The hollow twin-core fiber coat of section grating to be written removes, and is fixed with fiber clamp；(2) fill to the inside of hollow twin-core fiber
Gas (pumping) make inside of optical fibre air pressure be more than (less than) ambient pressure；(3) utilize heating element heats 2s, make optical fiber outward expansion
(inwardly collapsing)；(4) optical fiber is moved 1mm to same direction by command displacement platform, again heats to optical fiber, is heat time heating time
2s；(5) repeat step (3), (4) obtain periodic structure, realize the write of LPFG.
A kind of operation step of hollow twin-core LPFG wiring method based on thermal deformation mode of the present invention
Suddenly as follows：(1) the hollow twin-core fiber coat of one section of grating to be written is removed, and fixed with fiber clamp；(2) to hollow
Twin-core fiber inner inflatable (pumping) make inside of optical fibre air pressure be more than (less than) ambient pressure；(3) utilize heating element heats 2s,
Make optical fiber outward expansion (inwardly collapsing)；(4) optical fiber is moved 1mm to same direction by command displacement platform, again to optical fiber plus
Heat, heat time heating time is 2s；(5) repeat step (3), (4) obtain periodic structure, realize the write of LPFG.
Described hollow twin-core fiber has multiple fiber cores, annular covering and air chamber to constitute；For sky in the middle of annular covering
Air cavity, fiber cores are located in covering air chamber, melt and are embedded in annular covering inwall and are symmetric.
Described electrical heating element is double M type, has symmetrical structure, and hot zone is radially corresponding with fiber cores respectively, is loading
During different electric current, temperature field residing for fiber cores is different, thus the deformation that fiber cores produce is different, thus obtaining multiple parameters not
Same fiber grating.
Into optical fiber, then insufflation gas open heating element heater, optical fiber expanded by heating, and then pumping from optical fiber is opened and added
Thermal element, optical fiber is heated and collapses, and can obtain two kinds of different LPFGs of structure.
Fig. 1 is twin-core hollow optical fiber cross-sectional structure schematic diagram, and wherein 1 is to hang core；2 is annular covering；3 is air
Chamber.
Fig. 2 is double M type heating element structure schematic diagram.M1、M2For having the heater element of symmetrical structure, its material for a pair
For pyrographite, four feet are electrode pin, and intermediate annular region is the thermal treatment zone.Controlled by the size of current of controlled loading
Hot zone temperature.Work as M1、M2When loading different electric currents, temperature field residing for fiber cores is different, thus the deformation that fiber cores produce is not
With thus obtaining the different fiber grating of parameter.
Fig. 3 (a) is to expand the deformation producing during the inflation in twin-core hollow optical fiber；Fig. 3 (b) is in twin-core hollow optical fiber
Collapse during pumping the deformation of generation.LPFG is to be made up of multiple said structure periodic arrangement.
Fig. 4 is the writing station schematic diagram of hollow twin-core LPFG.Wherein 4 is inflation (pumping) device, and 5 are
Hollow twin-core fiber, 6 is micropositioner, can move horizontally, and 7 is heater, 8 optical fiber fixtures.
Claims (4)
1. a kind of hollow twin-core LPFG wiring method based on thermal deformation mode is it is characterised in that include as follows
Step：
(1) the hollow twin-core fiber coat of one section of grating to be written is removed, and fixed with fiber clamp；
(2) to hollow twin-core fiber inner inflatable or pumping, inside of optical fibre air pressure is made to be more than or less than ambient pressure；
(3) utilize heating element heats 2s, make optical fiber outward expansion or inwardly collapse；
(4) optical fiber is moved 1mm to same direction by command displacement platform, again heats to optical fiber, is 2s heat time heating time；
(5) repeat step (3), (4) obtain periodic structure, realize the write of LPFG.
2. a kind of hollow twin-core LPFG wiring method based on thermal deformation mode according to claim 1,
It is characterized in that：Described hollow twin-core fiber is made up of two fiber cores, annular covering and air chamber；In the middle of annular covering it is
Air chamber, two fiber cores are located in covering air chamber, melt and are embedded in annular covering inwall and are symmetric.
3. a kind of hollow twin-core LPFG wiring method based on thermal deformation mode according to claim 1,
It is characterized in that：Described hollow twin-core fiber inner inflatable, to optical fiber heating, obtain is the long period light of convex-type structure
Fine grating.
4. a kind of hollow twin-core LPFG wiring method based on thermal deformation mode according to claim 1,
It is characterized in that：Described to hollow twin-core fiber internal air exhausting, to optical fiber heating, optical fiber is heated and collapses, and obtain is depression
The LPFG of type structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610984672.XA CN106405727A (en) | 2016-11-09 | 2016-11-09 | Thermal deformation mode-based hollow double-core long-period fiber grating fabrication method |
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| CN201610984672.XA CN106405727A (en) | 2016-11-09 | 2016-11-09 | Thermal deformation mode-based hollow double-core long-period fiber grating fabrication method |
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| CN106405727A true CN106405727A (en) | 2017-02-15 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3767375A1 (en) * | 2019-07-19 | 2021-01-20 | ASML Netherlands B.V. | A light source and a method for use in metrology applications |
| EP3851904A1 (en) * | 2020-01-15 | 2021-07-21 | ASML Netherlands B.V. | Method, assembly, and apparatus for improved control of broadband radiation generation |
| EP3865931A1 (en) * | 2020-02-12 | 2021-08-18 | ASML Netherlands B.V. | Method, assembly, and apparatus for improved control of broadband radiation generation |
| CN113608294A (en) * | 2021-07-05 | 2021-11-05 | 哈尔滨工程大学 | Material filling type hollow fiber grating and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881854A (en) * | 2010-04-29 | 2010-11-10 | 哈尔滨工程大学 | Inner wall melt-embedded type multicore single mode polarization-maintaining fiber grating and manufacture method |
| CN203894432U (en) * | 2014-04-25 | 2014-10-22 | 深圳大学 | Expansion type long period fiber grating based on photonic crystal fiber |
| CN105807370A (en) * | 2016-03-23 | 2016-07-27 | 哈尔滨工程大学 | Double-M-shaped electric heating device for multicore fiber fusion |
-
2016
- 2016-11-09 CN CN201610984672.XA patent/CN106405727A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881854A (en) * | 2010-04-29 | 2010-11-10 | 哈尔滨工程大学 | Inner wall melt-embedded type multicore single mode polarization-maintaining fiber grating and manufacture method |
| CN203894432U (en) * | 2014-04-25 | 2014-10-22 | 深圳大学 | Expansion type long period fiber grating based on photonic crystal fiber |
| CN105807370A (en) * | 2016-03-23 | 2016-07-27 | 哈尔滨工程大学 | Double-M-shaped electric heating device for multicore fiber fusion |
Non-Patent Citations (1)
| Title |
|---|
| 耿仕新: "熔嵌中空双芯光纤传感器及其温度特性研究", 《哈尔滨工程大学硕士论文集》 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3767375A1 (en) * | 2019-07-19 | 2021-01-20 | ASML Netherlands B.V. | A light source and a method for use in metrology applications |
| WO2021013521A1 (en) * | 2019-07-19 | 2021-01-28 | Asml Netherlands B.V. | A light source and a method for use in metrology applications |
| US10969542B2 (en) | 2019-07-19 | 2021-04-06 | Asml Netherlands B.V. | Radiation source with temperature-controlled hollow fiber and a method for use in metrology applications |
| TWI732629B (en) * | 2019-07-19 | 2021-07-01 | 荷蘭商Ａｓｍｌ荷蘭公司 | A light source and a method for use in metrology applications |
| CN114041082A (en) * | 2019-07-19 | 2022-02-11 | Asml荷兰有限公司 | Light source and method for metrology applications |
| US11467339B2 (en) | 2019-07-19 | 2022-10-11 | Asml Netherlands B.V. | Radiation source and a method for use in metrology applications |
| CN114041082B (en) * | 2019-07-19 | 2024-06-11 | Asml荷兰有限公司 | Light source and method for metrology applications |
| EP3851904A1 (en) * | 2020-01-15 | 2021-07-21 | ASML Netherlands B.V. | Method, assembly, and apparatus for improved control of broadband radiation generation |
| WO2021144093A1 (en) * | 2020-01-15 | 2021-07-22 | Asml Netherlands B.V. | Method, assembly, and apparatus for improved control of broadband radiation generation |
| US11372154B2 (en) | 2020-01-15 | 2022-06-28 | Asml Netherlands B.V. | Method, assembly, and apparatus for improved control of broadband radiation generation |
| EP3865931A1 (en) * | 2020-02-12 | 2021-08-18 | ASML Netherlands B.V. | Method, assembly, and apparatus for improved control of broadband radiation generation |
| CN113608294A (en) * | 2021-07-05 | 2021-11-05 | 哈尔滨工程大学 | Material filling type hollow fiber grating and preparation method thereof |
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