CN2884230Y - Simple-structured optical-fiber coupling device - Google Patents
Simple-structured optical-fiber coupling device Download PDFInfo
- Publication number
- CN2884230Y CN2884230Y CN 200620023527 CN200620023527U CN2884230Y CN 2884230 Y CN2884230 Y CN 2884230Y CN 200620023527 CN200620023527 CN 200620023527 CN 200620023527 U CN200620023527 U CN 200620023527U CN 2884230 Y CN2884230 Y CN 2884230Y
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- optical fiber
- fiber
- sheath
- coupling
- beveled
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- Expired - Fee Related
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Abstract
A fiber coupler with simple structure, which pertains to the art of optical fiber transmission technology, is used to address fiber coupler structure. Its technical proposal comprises a main optical fiber, a coupling branch optical fiber and a sheath, wherein a depressed beveled notch is provided on the main optical fiber, at one end of the coupling branch optical fiber is a beveled tip that matches the beveled notch and butted with the beveled notch, and the sheath enwraps the butt joint. The utility model re-couples incident light from a certain direction using the branch side of the large-diameter plastic optical fiber for oriented coupling and is a key component of practical optical path. Its composition is very simple, facilitating the processing, fabrication and installation of couplers greatly, resulting in very high yield and reliability. Its appropriate performance cost ratio allows for mass production. It is preferably used in visible light path systems, and especially suitable as a fiber coupler for reflective optical fiber sensor.
Description
Technical field
The utility model relates to a kind of optical fiber coupling device, and especially the Light Coupled Device in the optical fiber sensing measuring system belongs to the optical fiber transmission technique field.
Background technology
In optical fiber sensing measuring system, utilize optical fiber to constitute photo-coupler, the coupler performance that Billy forms with other physics optical device is reliable and stable.But common fiber coupler requires machining precision height, complex process, production efficiency low.Method for making as the polishing fiber coupling mechanism of Stanford Univ USA development is: with optical fiber with on the flat board that is adhesive in fluting, then this subassembly being ground or is polished to makes optical fiber remain half, the plane of two such flat boards is lumped together, obtained the degree of coupling expected by regulating two optical fiber degree overlapping or that aim at, the length of regulating coupled section is to obtain directional couple.Its technological requirement is very high, the machining precision general device is difficult to realize; The successful technology of people such as SHEEM development is to remove after the optical fiber jacket for another example, carefully handles clean optical fiber.Then two optical fiber are twisted together, and the optical fiber that is in the wringing state is carried out etching, remove the overwhelming majority of covering, only be left the covering of 1-2 micron around fibre core, at this moment optical fiber is quite crisp, needs pour into the material reinforced of a kind of refractive index match in etching place.Processing technology is difficulty more.
Summary of the invention
Technical problem to be solved in the utility model overcomes the disadvantage of existing fiber coupling mechanism and a kind of fiber coupler simple in structure is provided.
The alleged problem of the utility model realizes with following technical scheme:
A kind of fiber coupler simple in structure, be provided with main fiber 1, coupling branch optical fiber 2 and sheath 3 in the formation, wherein, main fiber 1 is provided with the oblique breach of depression, one end of coupling branch optical fiber 2 be with the angled end-face of oblique breach coupling, it docks with oblique breach, sheath 3 is wrapped in the periphery, docking site.
The simple fiber coupler of said structure, described sheath 3 is a flexible sheath, leaving on the jacket wall the contracts slit 4 of rising.
The simple fiber coupler of said structure, the diameter of described main fiber 1 and coupling branch optical fiber 2 is 0.5mm～4mm, the tiltangle 1 of described oblique breach is that 3～9 degree, skew wall length L are 10～15mm.
The utility model utilizes the major diameter plastic optical fiber, and branch's incident light from certain direction that stresses to be coupled forms directional couple, is the critical component of practical optical path.Its constitutes extremely simple, is very easy to the processing and fabricating and the installation of coupling mechanism, can therefore obtain very high yield rate and functional reliability, and cost performance is suitable, be easy to produce in enormous quantities.Suit in the visible light path system that precision meets the demands, to use, especially suitable to the optical fiber coupling device use that is connected with reflection-type optical fibre sensor.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is a B-B sectional view among Fig. 1;
Fig. 3 is an A-A sectional view among Fig. 1.
Each label is among the figure: main fiber 1, the coupling branch optical fiber 2, sheath 3, slit 4, tiltangle 1, the long L of oblique arm of rising contracts.
Embodiment
Consult accompanying drawing.Main fiber 1 and coupling branch optical fiber 2 adopt the plastic optical fiber of major diameter polymethyl methacrylate (PMMA) material, main fiber 1 interlude removes the oblique breach that part forms depression, the butt end skiving of coupling branch optical fiber 2 becomes the splay end head with oblique breach coupling, docks with oblique breach.To have after the butt joint contracts rise the sheath 3 in slit 4 be sleeved on the docking site just can, fabrication and installation are very easy.
Tiltedly the tiltangle 1 of breach can be chosen in 3～9 degree, 10～15mm scope respectively according to the different of diameter, cladding index and use light source of fibre core with the long L of oblique arm.Tiltedly breach drift angle λ is to be advisable greater than 90 ° obtuse angle.Sheath 3 is an elastic material, and the slit 4 of rising of contracting on the jacket wall communicates with the both sides end face of sheath 3, passes through whole jacket wall, is positioned at bottom, parcel position behind the suit.
Shown in the middle as shown arrow, the right-hand member of main fiber 1 is behaved and is penetrated light input end, the non-butt joint termination of coupling branch optical fiber 2 is the reflected light output terminal, the left end of main fiber 1 can be connected with reflection-type optical fibre sensor, the reflected light that pickoff sensor transmits, for monitoring system provides the light signal that is used for measuring tested parameter, after opto-electronic conversion, handle to measure the numerical value of measurand again at electrical domain.
Claims (3)
1. fiber coupler simple in structure, it is characterized in that, main fiber [1], coupling branch optical fiber [2], sheath [3] are arranged in the formation, the oblique breach that depression is arranged on the main fiber [1], one end of coupling branch optical fiber [2] is to dock with the splay end head of oblique breach coupling and with oblique breach, and sheath [3] is wrapped in the periphery, docking site.
2. fiber coupler simple in structure according to claim 1 is characterized in that, described sheath [3] is a flexible sheath, leaving on the jacket wall the contracts slit [4] of rising.
3. fiber coupler simple in structure according to claim 1 and 2 is characterized in that, the diameter of described main fiber [1] is 0.5～4mm, and the tiltangle 1 of described oblique breach is that 3～9 degree, skew wall length L are 10～15mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620023527 CN2884230Y (en) | 2006-02-15 | 2006-02-15 | Simple-structured optical-fiber coupling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620023527 CN2884230Y (en) | 2006-02-15 | 2006-02-15 | Simple-structured optical-fiber coupling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2884230Y true CN2884230Y (en) | 2007-03-28 |
Family
ID=37957290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620023527 Expired - Fee Related CN2884230Y (en) | 2006-02-15 | 2006-02-15 | Simple-structured optical-fiber coupling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2884230Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI571662B (en) * | 2012-04-20 | 2017-02-21 | 鴻海精密工業股份有限公司 | Y branch waveguide and method for making same |
| CN110323660A (en) * | 2019-07-04 | 2019-10-11 | 江苏亨通光纤科技有限公司 | A kind of anti-return light all-fiber devices |
| CN112731593A (en) * | 2021-01-05 | 2021-04-30 | 南通大学 | All-fiber micro-fiber reflector and preparation method thereof |
-
2006
- 2006-02-15 CN CN 200620023527 patent/CN2884230Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI571662B (en) * | 2012-04-20 | 2017-02-21 | 鴻海精密工業股份有限公司 | Y branch waveguide and method for making same |
| CN110323660A (en) * | 2019-07-04 | 2019-10-11 | 江苏亨通光纤科技有限公司 | A kind of anti-return light all-fiber devices |
| CN112731593A (en) * | 2021-01-05 | 2021-04-30 | 南通大学 | All-fiber micro-fiber reflector and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070328 Termination date: 20150215 |
|
| EXPY | Termination of patent right or utility model |