CN201955488U - Expanded core optical fiber - Google Patents
Expanded core optical fiber Download PDFInfo
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- CN201955488U CN201955488U CN2010206448894U CN201020644889U CN201955488U CN 201955488 U CN201955488 U CN 201955488U CN 2010206448894 U CN2010206448894 U CN 2010206448894U CN 201020644889 U CN201020644889 U CN 201020644889U CN 201955488 U CN201955488 U CN 201955488U
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Abstract
The utility model relates to an expanded core optical fiber, belonging to the technical field of an optical fiber. The expanded core optical fiber comprises a fiber core, a cladding and a coating and is characterized in that the fiber core comprises a small core diameter part, a transitional core diameter part and a large core diameter part; the cross sections of the joints for the small core diameter part and the transitional core diameter part are the same, and the cross sections of the joints for the large core diameter part and the transitional core diameter part are the same; the diameter of the cross sections of the joints for the small core diameter part and the transitional core diameter part is smaller than that for the large core diameter part and the transitional core diameter part; the refractive index of the fiber core is smaller than that of the cladding, and the refractive index of the cladding is smaller than that of the coating; the external diameters are sequentially augmented from the small core diameter part to the large core diameter part on the longitudinal section of an optical fiber shaft; the diameter of the small core diameter part is the same, and the diameter of the large core diameter part is the same; the small core diameter part, the transitional core diameter part and the large core diameter part are integrally formed; and the optical fiber adopts an integrated structure. The expanded core optical fiber has the advantages that photoelectric and electrooptical equipment can be reduced, the cost can be greatly saved, and the expanded core optical fiber is convenient and simple to use and is convenient to produce.
Description
Technical field
The utility model belongs to the optical fiber technology field, relates to the optical fiber that different core diameters are arranged in a kind of optical fiber.
Background technology
Optical communication, as one of main means of modern communications, more and more paid attention to by people, be applied to each technical field now, for this reason, various light transmitting fibers are widely used, because the principle of total reflection, light transmitting fiber can make the light image electric current the same along the lead transmission, owing to light transmitting fiber is mainly made by highly purified quartz glass, therefore, has good in anti-interference performance, electric radiation does not take place, the communication quality height, transmission attenuation is few, quality is little and thin, be not afraid of corrosion, lay advantages such as convenient, reliable and stable, strong security; For this reason, 2009, Nobel Prize in physics was authorized founder---the Britain nationality Chinese scientist Gao Kun of light transmitting fiber invention.
Existing fibre-optic kind is a lot, and commonly used have quartz glass optical fiber and a plastic optical fiber etc.Include multimode optical fiber, single-mode fiber in the quartz glass optical fiber; Include types such as plain edition silicon dioxide single-mode fiber, polarization maintenance silicon dioxide single-mode fiber, the low attenuation type silicon dioxide single-mode fiber of all band, crooked unwise type silicon dioxide single-mode fiber in the single-mode fiber again.Light transmitting fiber of the prior art, it generally is by the fibre core that is positioned at central authorities, is positioned at the covering outside the fibre core and the coat that is positioned at outside the covering is constituted, and the diameter of fibre core requires basically identical, and this optical fiber is very suitable for the long-distance transmissions of signal.Yet, along with the develop rapidly of telecommunications, to use field of optical fibers and constantly enlarge, the light transmitting fiber type of use also has nothing in common with each other, and in LAN (Local Area Network), owing to consider the factors such as cost of equipment, generally adopts multimode optical fiber; And on long-distance, arterial grid, all use single-mode fiber; Therefore, when the signal in the LAN (Local Area Network) was outputed to the outside, because dissimilar optical fiber, core diameter was widely different, therefore, and can not the phase welding; For this reason, need convert the light signal in the LAN (Local Area Network) to electric signal earlier, convert the electrical signal to light signal again and export in the single-mode fiber, therefore, increase huge cost expenditure to the user.
The utility model content
In order to address the above problem, the purpose of this utility model provides a kind of expansion core fibre, and it can be used in the switching of light in the dissimilar light transmitting fibers, does not need extra equipment, and the utility model is realized by the following technical solutions:
A kind of expansion core fibre, comprise fibre core, be coated on covering 2 outside the fibre core, be coated on the coat 3 outside the covering, it is characterized in that: the big core diameter part 13 that described fibre core comprises little core diameter part 11, the transition core diameter part 12 that is connected with little core diameter part one end, is connected with the transition core diameter part other end; Little core diameter part is identical and big or small the same with the shape of cross section of transition core diameter part junction, and big core diameter part is identical and big or small the same with the shape of cross section of transition core diameter part junction; The cross-sectional diameter of little core diameter part and transition core diameter part junction is less than the cross-sectional diameter of big core diameter part with transition core diameter part junction; The refractive index of core material is less than the refractive index of clad material, and the refractive index of clad material is less than the refractive index of coat material; Along on the longitudinal section of crossing fiber axis, to big core diameter part and transition core diameter part junction, external diameter increases successively from little core diameter part and transition core diameter part junction; The diameter of described little core diameter part is the same, and the diameter of described big core diameter part is the same; The little core diameter part of described fibre core, transition core diameter part, big core diameter partly are formed as one; Described optical fiber is integrated; Backscattering attenuation coefficient difference≤0.03dB/km that the both ends of described optical fiber are measured; Described optical fiber is with the angularity 〉=4m of diameter metering; Disruptive force 〉=40N that described optical fiber is arbitrary section; Appoint and get one meter optical fiber that comprises transition core diameter part, fix optical fiber one end and make the optical fiber freedom sagging, under steady state (SS), the optical fiber other end is compared with an end, the angle of circumferentially reversing≤360 degree.
Above-mentioned described expansion core fibre is characterized in that: the diameter of described little core diameter part is: 7.5-10.5 μ m; And the diameter of described big core diameter part is: 45-55 μ m.
Above-mentioned described expansion core fibre is characterized in that: the diameter of described little core diameter part is: 7.5-10.5 μ m; And the diameter of described big core diameter part is: 57.5-67.5 μ m.
Above-mentioned described expansion core fibre is characterized in that: the diameter of described little core diameter part is: 45-55 μ m; And the diameter of described big core diameter part is: 57.5-67.5 μ m.
Above-mentioned described expansion core fibre is characterized in that: each is symmetrical about the axle of optical fiber naturally for described little core diameter part, transition core diameter part, big core diameter part.
Above-mentioned described expansion core fibre is characterized in that: described transition core diameter partial-length is for being not less than 2 meters and be not more than 500 meters.
Above-mentioned described expansion core fibre is characterized in that: described transition core diameter partly is cylinder table shape.
In the utility model, because having three parts, fibre core forms, and the diameter at transition core diameter part two ends is respectively to be complementary with the diameter of little core diameter part and the diameter of big core diameter part, insert the joints of optical fibre respectively so little core diameter is partly reached big core diameter part, keep complete transition core diameter part, just finished the making of connector, adopt the connection of this optical fiber, can reduce the equipment of photoelectricity and electric light conversion, save cost widely, and easy to use, simple.
Description of drawings
Fig. 1 is the vertical section structure synoptic diagram of the utility model embodiment 1;
Fig. 2 is the left side view of the utility model embodiment 1;
Fig. 3 is the core diameter-staple diagram of the utility model embodiment 1.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail.
Embodiment 1
See also Fig. 1 to Fig. 3, a kind of expansion core fibre, comprise fibre core, be coated on covering 2 outside the fibre core, be coated on the coat 3 outside the covering, it is characterized in that: the big core diameter part 13 that described fibre core comprises little core diameter part 11, the transition core diameter part 12 that is connected with little core diameter part one end, is connected with the transition core diameter part other end; Little core diameter part is identical and big or small the same with the shape of cross section of transition core diameter part junction, and big core diameter part is identical and big or small the same with the shape of cross section of transition core diameter part junction; The cross-sectional diameter of little core diameter part and transition core diameter part junction is less than the cross-sectional diameter of big core diameter part with transition core diameter part junction; The refractive index of core material is less than the refractive index of clad material, and the refractive index of clad material is less than the refractive index of coat material; Along on the longitudinal section of crossing fiber axis, to big core diameter part and transition core diameter part junction, external diameter increases successively from little core diameter part and transition core diameter part junction; The diameter of described little core diameter part is the same, and the diameter of described big core diameter part is the same; The little core diameter part of described fibre core, transition core diameter part, big core diameter partly are formed as one; Described optical fiber is integrated; Backscattering attenuation coefficient difference≤0.03dB/km that the both ends of described optical fiber are measured; Described optical fiber is with the angularity 〉=4m of diameter metering; Disruptive force 〉=40N that described optical fiber is arbitrary section; Appoint and get one meter optical fiber that comprises transition core diameter part, fix optical fiber one end and make the optical fiber freedom sagging, under steady state (SS), the optical fiber other end is compared with an end, the angle of circumferentially reversing≤360 degree; The diameter d 1 of described little core diameter part is: 7.5-10.5 μ m; And the diameter d 2 of described big core diameter part is: 45-55 μ m; Each is symmetrical about the axle 14 of optical fiber naturally for described little core diameter part, transition core diameter part, big core diameter part; Described transition core diameter part starting point is that L1, terminal point are L2, and transition core diameter partial-length is 2 meters; Described transition core diameter partly is a cylinder table shape.
Embodiment 2
Please refer to Fig. 1 to Fig. 3, a kind of expansion core fibre, with embodiment 1, difference is substantially: the diameter of described little core diameter part is: 7.5-10.5 μ m; And the diameter of described big core diameter part is: 57.5-67.5 μ m; Transition core diameter partial-length is 250 meters.
Embodiment 3
Please refer to Fig. 1 to Fig. 3, a kind of expansion core fibre, with embodiment 1, difference is substantially: the diameter of described little core diameter part is: 45-55 μ m; And the diameter of described big core diameter part is: 57.5-67.5 μ m; Described transition core diameter partly is non-cylinder table shape, and outer cause curve is formed; Transition core diameter partial-length is 500 meters.
Expansion core fibre described in above-mentioned arbitrary embodiment is characterized in that: the diameter of described little core diameter part is: 7.5-10.5 μ m; And the diameter of described big core diameter part is: 45-55 μ m.
Expansion core fibre described in above-mentioned arbitrary embodiment is characterized in that: the diameter of described little core diameter part is: 7.5-10.5 μ m; And the diameter of described big core diameter part is: 57.5-67.5 μ m.
Expansion core fibre described in above-mentioned arbitrary embodiment is characterized in that: the diameter of described little core diameter part is: 45-55 μ m; And the diameter of described big core diameter part is: 57.5-67.5 μ m.
Expansion core fibre described in above-mentioned arbitrary embodiment is characterized in that: each is symmetrical about the axle of optical fiber naturally for described little core diameter part, transition core diameter part, big core diameter part.
Expansion core fibre described in above-mentioned arbitrary embodiment is characterized in that: described transition core diameter partial-length is for being not less than 2 meters and be not more than 500 meters.
Expansion core fibre described in above-mentioned arbitrary embodiment is characterized in that: described transition core diameter part all can be cylinder table shape.
In the utility model, because having three parts, fibre core forms, and the diameter at transition core diameter part two ends is respectively to be complementary with the diameter of little core diameter part and the diameter of big core diameter part, insert the joints of optical fibre respectively so little core diameter is partly reached big core diameter part, keep complete transition core diameter part, just finished the making of connector, adopt the connection of this optical fiber, can reduce the equipment of photoelectricity and electric light conversion, save cost widely, and easy to use, simple; The utility model is convenient for production.
The utility model is not limited to above-mentioned preferred forms, should be appreciated that design of the present utility model can be by other various forms enforcement utilizations, and they drop in the protection domain of the present utility model equally.
Claims (7)
1. one kind is expanded core fibre, comprise fibre core, be coated on covering (2) outside the fibre core, be coated on the coat (3) outside the covering, it is characterized in that: the transition core diameter that described fibre core comprises little core diameter part (11), is connected with little core diameter part one end is (12), the big core diameter that is connected with the transition core diameter part other end partly (13) partly; Little core diameter part is identical and big or small the same with the shape of cross section of transition core diameter part junction, and big core diameter part is identical and big or small the same with the shape of cross section of transition core diameter part junction; The cross-sectional diameter of little core diameter part and transition core diameter part junction is less than the cross-sectional diameter of big core diameter part with transition core diameter part junction; The refractive index of core material is less than the refractive index of clad material, and the refractive index of clad material is less than the refractive index of coat material; Along on the longitudinal section of crossing fiber axis, to big core diameter part and transition core diameter part junction, external diameter increases successively from little core diameter part and transition core diameter part junction; The diameter of described little core diameter part is the same, and the diameter of described big core diameter part is the same; The little core diameter part of described fibre core, transition core diameter part, big core diameter partly are formed as one; Described optical fiber is integrated; Backscattering attenuation coefficient difference≤0.03dB/km that the both ends of described optical fiber are measured; Described optical fiber is with the angularity 〉=4m of diameter metering; Disruptive force 〉=40N that described optical fiber is arbitrary section; Appoint and get one meter optical fiber that comprises transition core diameter part, fix optical fiber one end and make the optical fiber freedom sagging, under steady state (SS), the optical fiber other end is compared with an end, the angle of circumferentially reversing≤360 degree.
2. expansion core fibre according to claim 1 is characterized in that: the diameter of described little core diameter part is: 7.5-10.5 μ m; And the diameter of described big core diameter part is: 45-55 μ m.
3. expansion core fibre according to claim 1 is characterized in that: the diameter of described little core diameter part is: 7.5-10.5 μ m; And the diameter of described big core diameter part is: 57.5-67.5 μ m.
4. expansion core fibre according to claim 1 is characterized in that: the diameter of described little core diameter part is: 45-55 μ m; And the diameter of described big core diameter part is: 57.5-67.5 μ m.
5. expand core fibre according to described any of claim 1-4, it is characterized in that: each is symmetrical about the axle of optical fiber naturally for described little core diameter part, transition core diameter part, big core diameter part.
6. according to claim 5 any expands core fibre, it is characterized in that: described transition core diameter partial-length is for being not less than 2 meters and be not more than 500 meters.
7. according to claim 6 any expands core fibre, it is characterized in that: described transition core diameter partly is cylinder table shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206448894U CN201955488U (en) | 2010-12-03 | 2010-12-03 | Expanded core optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206448894U CN201955488U (en) | 2010-12-03 | 2010-12-03 | Expanded core optical fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201955488U true CN201955488U (en) | 2011-08-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206448894U Expired - Fee Related CN201955488U (en) | 2010-12-03 | 2010-12-03 | Expanded core optical fiber |
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| Country | Link |
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| CN (1) | CN201955488U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101995602A (en) * | 2010-12-03 | 2011-03-30 | 蒋菊生 | Expanded core fiber |
| CN103267996A (en) * | 2013-06-01 | 2013-08-28 | 青岛农业大学 | Comb filter based on expanded-core optical fiber |
-
2010
- 2010-12-03 CN CN2010206448894U patent/CN201955488U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101995602A (en) * | 2010-12-03 | 2011-03-30 | 蒋菊生 | Expanded core fiber |
| CN101995602B (en) * | 2010-12-03 | 2012-11-14 | 李光 | Expanded core fiber |
| CN103267996A (en) * | 2013-06-01 | 2013-08-28 | 青岛农业大学 | Comb filter based on expanded-core optical fiber |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110831 Termination date: 20111203 |