CN110320590B - Method for manufacturing mechanically chirped long-period fiber grating - Google Patents
Method for manufacturing mechanically chirped long-period fiber grating Download PDFInfo
- Publication number
- CN110320590B CN110320590B CN201910412591.6A CN201910412591A CN110320590B CN 110320590 B CN110320590 B CN 110320590B CN 201910412591 A CN201910412591 A CN 201910412591A CN 110320590 B CN110320590 B CN 110320590B
- Authority
- CN
- China
- Prior art keywords
- chirped
- tube
- heat
- steel
- period
- 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.)
- Active
Links
Images
Classifications
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Diffracting Gratings Or Hologram Optical Elements (AREA)
Abstract
A manufacturing method of a mechanical chirped long-period fiber grating comprises a heat shrink tube, a hot melt tube, two steel needles with chirped period threads and an optical fiber, wherein the steel needles are processed to manufacture chirped threaded steel needles through threads, the chirped threaded steel needles are placed between the heat shrink tube and the hot melt tube through an automatic pin inserting machine and an automatic pipe shrinking machine, two ends of the chirped threaded steel needles are pre-shrunk to finish packaging, then the optical fiber is placed into the hot melt tube, a heat shrink tube oven is used for heating the heat shrink tube, so that the heat shrink tube presses the chirped threaded steel needles, and the chirped threaded steel forms a pressing effect on the optical fiber to generate the chirped long-period fiber grating. The invention provides a method for manufacturing mechanically chirped long-period fiber grating, which has the advantages of simplified process, mature process flow, low cost and stable performance.
Description
Technical Field
The invention relates to the field of optical fiber sensing and the field of manufacturing processes of optical communication passive devices, in particular to a method for manufacturing mechanically chirped long-period fiber gratings (MC L PFG).
Background
The optical fiber grating is a device with periodically changed fiber core refractive index, is a frequency spectrum selection element, has small volume, is simple to manufacture, is easy to be connected with other optical fiber devices, can form various all-optical fiber devices, has wider bandwidth, can realize band elimination of multiple wavelengths in a transmission spectrum, is suitable for multi-wavelength filtering, and has great application prospect in the fields of communication and sensing.
The current research on chirped long period grating (C L PFG) is mostly still in theoretical research stage, and the existing manufacturing techniques mainly include an ultraviolet writing method and a mechanical pressure method, the mechanical L PFG (M L PFG) can easily realize grating formation and can adjust the peak loss at the resonance wavelength by changing the external pressure compared with the ultraviolet induced long period fiber grating (UV-L PFG). The typical M L PFG manufacturing method is to apply pressure to the optical fiber through periodic grooves and flat plates or two periodic grooves.
Therefore, the currently proposed C L PFG lacks experimental manufacturing means, and the manufacturing method and device of the M L PFG are heavy and complicated, which causes great problems in the manufacturing of the MC L PFG.
Disclosure of Invention
In order to solve the problem of difficult manufacture of the mechanically chirped long-period grating (MC L PFG), the invention provides the method for manufacturing the mechanically chirped long-period fiber grating, which has the advantages of simplified process, mature process flow, low cost and stable performance.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a manufacturing method of a mechanical chirped long-period fiber grating comprises a heat shrink tube, a hot melt tube, two steel needles with chirped period threads and an optical fiber, wherein the steel needles are subjected to thread machining to manufacture the chirped threads, the chirped thread steel needles are placed between the heat shrink tube and the hot melt tube by using an automatic pin inserting machine and an automatic pipe shrinking machine, two ends of the steel needles are pre-shrunk to finish packaging, then the optical fiber is placed into the hot melt tube, the heat shrink tube is heated by using a heat shrink tube oven, so that the heat shrink tube presses the chirped thread steel needles, and the chirped thread steel forms a pressing effect on the optical fiber to generate the chirped long-period fiber grating.
Further, the outer diameter of the heat-shrinkable tube is determined according to the diameter of the steel needle and the diameter of the optical fiber, and the heat-shrinkable tube shrinks to a corresponding size when the temperature is increased.
Furthermore, the precise machining center related to the manufacturing of the chirped period threaded steel needle is a numerical control milling machine with a tool magazine, and a tool used for manufacturing the threads is a thread milling cutter; the thread pitch and the chirp distribution coefficient are customized according to requirements.
Further, the steel needle material includes, but is not limited to, stainless acid-resistant steel.
The manufacturing method comprises the following steps:
firstly, manufacturing a chirp period thread on a steel needle by using a precision machining center;
step two, inserting two symmetrical steel needles between the heat shrinkable tube and the hot melting tube by using an automatic needle inserting machine; the automatic pin inserting machine can automatically cut the tube and preliminarily complete the fixation of the steel pin;
and step three, pre-shrinking two ends of the heat shrink tube by using a tube shrinking machine to finish the packaging of the steel needle, the heat shrink tube and the hot melting tube.
And step four, inserting the optical fiber with the coating layer removed into a heat-shrinkable tube, heating by using an oven, and finally, subjecting the optical fiber to stress from a threaded steel needle to form the section of the optical fiber into a mechanically chirped long-period fiber grating (MC L PFG).
The technical conception of the invention is as follows: the chirp period threads are processed on the steel needle through the precision processing center, the steel needles with the same chirp period threads are inserted into the heat-shrinkable tube, and a special oven of the heat-shrinkable tube is used for heating and shrinking, so that the mechanically-made chirp long-period fiber grating which is stable and reliable in performance and can be separated from a complex stress device for independent use is realized.
The invention has the following beneficial effects: 1) the manufacturing process has the advantages of simple route, mature process flow and low cost; 2) the process technology ensures that the chirped long-period fiber grating has a stable filtering effect and stable performance, and the application of the heat-shrinkable tube and the inserted steel needle reduce the damage rate of the fiber grating; 3) through selecting for use the pyrocondensation pipe of different external diameters and adjusting the screw thread interval to the shrink process is heated in the control, and collapsible to predetermined size can realize different applied pressure and filtering wavelength, thereby produces different filtering effect.
Drawings
FIG. 1 is a flow chart of a method for fabricating a chirped long period fiber grating structure.
Fig. 2 is a schematic diagram of a structure of a chirped threaded steel needle.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1 and 2, a method for manufacturing a mechanically chirped long-period fiber grating (MC L PFG), the mechanically chirped long-period fiber grating (MC L PFG) includes a heat shrink tube 103, a heat shrink tube 104, two steel pins 102 having a chirped period thread, and an optical fiber 105, and the manufacturing apparatus mainly involves a precision machining center, an automatic pin inserter, an automatic tube reducer, and a heat shrink tube oven, the steel pins 101 are threaded to manufacture the chirped threaded steel pins 102, the structure of the chirped threaded steel pins is shown as 106 in fig. 2, the chirped threaded steel pins are placed between the heat shrink tube 103 and the heat shrink tube 104 by the automatic pin inserter and the automatic tube reducer, both ends are pre-shrunk to complete packaging, then the optical fiber 105 is placed inside the heat shrink tube, the heat shrink tube 103 is heated, thereby causing the heat shrink tube 103 to press the chirped threaded steel pins 102, the chirped threaded steel pins 102 form a pressing effect on the optical fiber 105, and the chirped long-period fiber grating oven (MC L PFG) is generated by the optical fiber grating.
Further, the outer diameter of the heat shrinkable tube 103 is determined according to the diameter of the steel needle 101 and the diameter of the optical fiber, and the heat shrinkage process is controllable, so that the heat shrinkable tube can be shrunk to a predetermined size to generate forces of different sizes.
Still further, the precise machining center involved in the manufacturing of the threaded steel needle 102 with the chirp period is a numerically controlled milling machine with a tool magazine, and a tool used for manufacturing threads is a thread milling cutter; the thread pitch and the chirp distribution coefficient are customized according to requirements.
Further, the material of the steel needle 101 includes, but is not limited to, stainless acid-proof steel.
The manufacturing method comprises the following steps:
step one, the chirp period thread 106 on the steel needle 101 is manufactured, a precise machining center is adopted to machine the thread, and a cutter can be a thread milling cutter.
And step two, inserting two steel pins 102 with the chirped threads into the heat shrinkable tube 103 by using an insertion machine. Two symmetrical chirped steel needles 102 are inserted between the heat shrink tube 103 and the hot melt tube 104 by using an automatic needle inserting machine; the automatic pin inserting machine can automatically cut the tube and preliminarily complete the fixation of the steel pin.
And step three, pre-shrinking the two ends of the heat shrink tube 103 by using a tube shrinking machine to finish the packaging of the steel needle, the heat shrink tube and the hot melting tube.
And step four, inserting the optical fiber 105 with the coating layer removed into the heat shrinkable tube 103, then heating the heat shrinkable tube 103 by using a special heat shrinkable tube oven, and finally, subjecting the optical fiber 105 to stress from the threaded steel needle 102 to form the chirped long-period fiber grating (MC L PFG).
The precise machining center involved in the manufacturing of the threaded steel needle 102 with the chirp period is a numerical control milling machine with a tool magazine, and a cutter used for manufacturing threads is a thread milling cutter. The pitch of the external threads 106 and the chirp distribution coefficient are desirably made, and the material of the steel needle 101 includes, but is not limited to, stainless acid-resistant steel.
Claims (5)
1. The mechanical chirped long-period fiber grating manufacturing method is characterized in that the mechanical chirped long-period fiber grating comprises a heat-shrinkable tube, a hot-melt tube, two steel needles with chirped period threads and an optical fiber, the steel needles are processed through threads to manufacture chirped threaded steel needles, two symmetrical steel needles are inserted between the heat-shrinkable tube and the hot-melt tube at the same time through an automatic pin inserting machine, two ends of the heat-shrinkable tube are pre-shrunk through the automatic pipe shrinking machine to complete packaging, then the optical fiber is placed into the hot-melt tube, the heat-shrinkable tube is heated through a heat-shrinkable tube oven, so that the heat-shrinkable tube presses the chirped threaded steel needles, the chirped threaded steel forms a pressing effect on the optical fiber, and the chirped long-period fiber grating.
2. The method of claim 1, wherein the outer diameter of the heat shrink tube is determined by the diameter of the steel pin and the diameter of the optical fiber, and the heat shrink tube shrinks to a corresponding size when heated.
3. The method for manufacturing a mechanically chirped long-period fiber grating according to claim 1 or 2, wherein a precise machining center involved in manufacturing the chirped period threaded steel needle is a numerically controlled milling machine with a tool magazine, and a tool used for manufacturing threads is a thread milling cutter; the thread pitch and the chirp distribution coefficient are customized according to requirements.
4. The method of claim 1 or 2, wherein the steel pin material is stainless acid-resistant steel.
5. A method of making a mechanically chirped long period fiber grating according to claim 1 or 2, wherein the method comprises the steps of:
firstly, manufacturing a chirp period thread on a steel needle by using a precision machining center;
step two, inserting two symmetrical steel needles between the heat shrinkable tube and the hot melting tube by using an automatic needle inserting machine; the automatic pin inserting machine can automatically cut the tube and preliminarily complete the fixation of the steel pin;
pre-shrinking two ends of the heat shrink tube by using an automatic tube shrinking machine to finish the packaging of the steel needle, the heat shrink tube and the hot melting tube;
inserting the optical fiber with the coating layer removed into a heat-shrinkable tube, and heating by using an oven; finally, the fiber is subjected to stress from a threaded steel pin, and this length of fiber forms a mechanically chirped long period fiber grating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910412591.6A CN110320590B (en) | 2019-05-17 | 2019-05-17 | Method for manufacturing mechanically chirped long-period fiber grating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910412591.6A CN110320590B (en) | 2019-05-17 | 2019-05-17 | Method for manufacturing mechanically chirped long-period fiber grating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110320590A CN110320590A (en) | 2019-10-11 |
| CN110320590B true CN110320590B (en) | 2020-07-31 |
Family
ID=68113151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910412591.6A Active CN110320590B (en) | 2019-05-17 | 2019-05-17 | Method for manufacturing mechanically chirped long-period fiber grating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110320590B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111722314B (en) * | 2020-05-27 | 2023-04-07 | 浙江工业大学 | Method for manufacturing mechanical long-period fiber grating |
| CN112068240A (en) * | 2020-09-07 | 2020-12-11 | 桂林电子科技大学 | Long-period chirped fiber grating and preparation method thereof |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004191860A (en) * | 2002-12-13 | 2004-07-08 | Matsushita Electric Ind Co Ltd | Device for compensating dispersion |
| JP2004334052A (en) * | 2003-05-12 | 2004-11-25 | Matsushita Electric Ind Co Ltd | Variable dispersion compensation module |
| JP4275469B2 (en) * | 2003-06-16 | 2009-06-10 | 大日本印刷株式会社 | Concave and convex pattern forming material, concave and convex pattern receptor, concave and convex pattern forming method, transfer foil, and optical article |
| JP2005321601A (en) * | 2004-05-10 | 2005-11-17 | Matsushita Electric Ind Co Ltd | Dispersion-compensating module |
| CN2821600Y (en) * | 2005-09-08 | 2006-09-27 | 中国计量学院 | Flat chirp bragg optical fiber grating filter for light amplifier gain |
| CN1987537A (en) * | 2006-12-30 | 2007-06-27 | 北京交通大学 | Chirp long period optic fiber grating for compensating wide band dispersion and its producing method |
| CN102103227A (en) * | 2011-01-21 | 2011-06-22 | 中国计量学院 | Polarization device based on chirp long-period fiber bragg grating of photonic crystal |
| CN103412360A (en) * | 2013-08-27 | 2013-11-27 | 南开大学 | Method for preparing asymmetric wave-shaped long-period optical fiber grating by means of high-frequency carbon dioxide laser-assisted wet-etching |
| CN103616742B (en) * | 2013-12-11 | 2015-06-17 | 李智忠 | Method for fabricating chirped fiber grating |
| CN105356295A (en) * | 2015-11-10 | 2016-02-24 | 南京大学 | Method for preparing DFB laser and array based on reconstruction-equivalent chirp and nanoimprint |
| CN105676351A (en) * | 2016-03-11 | 2016-06-15 | 南京威宁锐克信息技术有限公司 | Grating manufacturing method |
| CN108845388B (en) * | 2018-06-20 | 2020-01-10 | 浙江工业大学 | Method for manufacturing mechanical long-period fiber grating |
| CN109000809B (en) * | 2018-07-17 | 2019-10-22 | 南通大学 | A kind of Mach-Zender interferometer and its making apparatus and production method |
| CN109683231A (en) * | 2019-01-07 | 2019-04-26 | 浙江工业大学 | Mechanical chirp long period optic fiber grating |
-
2019
- 2019-05-17 CN CN201910412591.6A patent/CN110320590B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN110320590A (en) | 2019-10-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110320590B (en) | Method for manufacturing mechanically chirped long-period fiber grating | |
| US5175779A (en) | Method of forming an optical fibre coupler and a coupler so formed | |
| USRE35138E (en) | Achromatic overclad fiber optic coupler | |
| EP0350900B1 (en) | Method of manufacturing optical branching and coupling device | |
| EP0436182B1 (en) | 1xN fiber optic coupler and method of making | |
| US7209615B2 (en) | Etched tapered fiber bundle and method of making the same | |
| EP0606583A1 (en) | Achromatic optical fiber coupler | |
| EP1006376B1 (en) | Method of fabricating optical fibre bundle, and apparatus for carrying out the method | |
| CN203616499U (en) | 4 mu optical fiber image inverter | |
| US4482203A (en) | Adjustable coupling device for a fiber-optic power divider | |
| CN108845388B (en) | Method for manufacturing mechanical long-period fiber grating | |
| EP0608226A4 (en) | Fused biconical taper fiber optic coupler station and fabrication techniques. | |
| CA2084300C (en) | Fiber optic power splitter | |
| CN103576239B (en) | A kind of multiple step format prepares the method for optical-fiber bundling device | |
| EP0704725A1 (en) | Low loss fiber optic coupler and method | |
| US4666234A (en) | Non-tapered, butt-coupled, fused-fiber optical coupler and method of forming the same | |
| EP0840146B1 (en) | Method for making long-period fiber gratings | |
| WO2002011961A1 (en) | Apparatus and method for manufacturing fiber gratings | |
| CN112068240A (en) | Long-period chirped fiber grating and preparation method thereof | |
| EP0403896B1 (en) | Method for fabrication of a star coupler from polymeric optical fibres | |
| CN210109494U (en) | Mechanical chirp long period optical fibre grating | |
| EP0895105B1 (en) | 1xN fiber optic coupler and corresponding method of making | |
| CN111722314B (en) | Method for manufacturing mechanical long-period fiber grating | |
| CN209928167U (en) | Vortex light field generation regulation and control device based on MLPFG | |
| US6763685B1 (en) | Fabrication of multiplexing and demultiplexing single-mode fiber optic couplers |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |