CN203012176U - Twin-core optical fiber with different optical signal transmission rates - Google Patents
Twin-core optical fiber with different optical signal transmission rates Download PDFInfo
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- CN203012176U CN203012176U CN 201220611223 CN201220611223U CN203012176U CN 203012176 U CN203012176 U CN 203012176U CN 201220611223 CN201220611223 CN 201220611223 CN 201220611223 U CN201220611223 U CN 201220611223U CN 203012176 U CN203012176 U CN 203012176U
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Abstract
The utility model discloses a twin-core optical fiber with different optical signal transmission rates, which comprises a wrapping layer, a first fiber core and a second fiber core, wherein the shape of the cross section of the wrapping layer is circular, the wrapping layer is silicon dioxide wrapping layer, the first fiber core and the second fiber core are both photonic crystal fiber cores, the first fiber core is a pore type fiber core, the second fiber core is a solid fiber core, the first fiber core and the second fiber core are both located inside the wrapping layer and different in refractive index, the difference between the refractive index of the first fiber core and the refractive index of the second fiber core is no less than 5%, the shapes of the cross sections of the first fiber core and the second fiber core are both circular, the diameter of the cross section of the second fiber core is greater than that of the cross section of the first fiber core, and the first fiber core and the second fiber core are provided with a plurality of pores therebetween. The twin-core optical fiber disclosed by the utility model solves the problem that an existing twin-core or multi-core optical fiber can not be used in a distributed detection sensing system, realizes different transmission rates of optical signals in the two fiber cores, and realizes the purpose of distributed monitoring easily.
Description
Technical field
The utility model relates to a kind of optical fiber, especially relates to a kind of different twin-core fiber of transmitting optical signal speed that has.
Background technology
In existing twin-core and multi-core fiber, the exponent of refractive index of each fibre core is basic identical, the speed that same light signal transmits in each fibre core is also very approaching, such optical fiber can be used for the optical sensing devices of interferometric method, but be applied in the sensor-based system of Distributed Detection at needs, the speed of need in same twin-core fiber, light signal transmitting in two fibre cores is different, and does not have such optical fiber on market.
The utility model content
The purpose of this utility model is to overcome above-mentioned deficiency of the prior art, a kind of different twin-core fiber of transmitting optical signal speed that has is provided, it is simple in structure, reasonable in design and result of use is good, existing twin-core and multi-core fiber can be effectively solved and the Distributed Detection sensor-based system can not be used for because the exponent of refractive index of each fibre core is basic identical, and realize the speed difference that same light signal transmits in two fibre cores, easily realize the purpose of distributed monitoring.
for achieving the above object, the technical solution adopted in the utility model is: a kind of have a different twin-core fiber of transmitting optical signal speed, it is characterized in that: comprise covering, the first fibre core and the second fibre core, the shape of cross section of described covering is circular, described covering is the silicon dioxide covering, described the first fibre core and the second fibre core are the photonic crystal fibre core, described the first fibre core is hole type fibre core, described the second fibre core is solid fibre core, described the first fibre core and the second fibre core all are positioned at the inside of covering, described the first fibre core is different with the exponent of refractive index of the second fibre core, the exponent of refractive index of the exponent of refractive index of described the first fibre core and the second fibre core differs and is not less than 5%, the shape of cross section of described the first fibre core and the second fibre core is circle, the cross-sectional diameter of described the second fibre core is greater than the cross-sectional diameter of the first fibre core, be provided with a plurality of pores between described the first fibre core and the second fibre core, a plurality of described pores evenly arrange.
Above-mentioned a kind of different twin-core fiber of transmitting optical signal speed that has, it is characterized in that: the exponent of refractive index of described the first fibre core and the second fibre core differs and is not less than 20%.
The utility model compared with prior art has the following advantages:
1, the utility model is simple in structure, reasonable in design and result of use is good.
2, the utility model can effectively solve existing twin-core and multi-core fiber can not be used for the Distributed Detection sensor-based system because the exponent of refractive index of each fibre core is basic identical, and realizes the speed difference that same light signal transmits in two fibre cores.
3, the speed transmitted in two fibre cores of the same light signal of the utility model is different, when occurring the intercoupling of transmitting optical signal under the impact in external physical quantity between two fibre cores, is easy to realize distributed optical fiber sensing monitoring.
Below by drawings and Examples, the utility model is described in further detail.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Description of reference numerals:
The 1-the first fibre core; The 2-the second fibre core; 3-covering;
4-pore.
Embodiment
as shown in Figure 1, the utility model comprises covering 3, the first fibre core 1 and the second fibre core 2, the shape of cross section of described covering 3 is circular, described covering 3 is the silicon dioxide covering, described the first fibre core 1 and the second fibre core 2 are the photonic crystal fibre core, described the first fibre core 1 is hole type fibre core, described the second fibre core 2 is solid fibre core, described the first fibre core 1 and the second fibre core 2 all are positioned at the inside of covering 3, described the first fibre core 1 is different with the exponent of refractive index of the second fibre core 2, the exponent of refractive index of the exponent of refractive index of described the first fibre core 1 and the second fibre core 2 differs and is not less than 5%, the shape of cross section of described the first fibre core 1 and the second fibre core 2 is circle, the cross-sectional diameter of described the second fibre core 2 is greater than the cross-sectional diameter of the first fibre core 1, be provided with a plurality of pores 4 between described the first fibre core 1 and the second fibre core 2, a plurality of described pores 4 evenly arrange.
In the present embodiment, preferred, the exponent of refractive index of described the first fibre core 1 and the second fibre core 2 differs and is not less than 20%.
In the utility model, the first fibre core 1 is different with the exponent of refractive index of the second fibre core 2, and the speed of transmitting in the different material of exponent of refractive index due to light is different, thereby makes same light signal different with the speed of transmission in the second fibre core 2 at the first fibre core 1.concrete, the exponent of refractive index of the first fibre core 1 of hole type is very little, exponent of refractive index near air, the exponent of refractive index of air is near 1, and the second solid fibre core 2 exponent of refractive index are just much bigger, when covering 3 adopts pure silicon dioxide to make, its exponent of refractive index is 1.458, namely the exponent of refractive index of the second fibre core 2 is 1.458, difference due to the first fibre core 1 and 2 two fiber core refractive index indexes of the second fibre core, make the speed that light signal transmits in two fibre cores that larger difference just be arranged, when between two fibre cores, close enough is to a certain degree, when occurring transmitting optical signal under the impact of extraneous measured physical quantity and intercouple between two fibre cores, be easy to realize distributed optical fiber sensing monitoring, namely by adopting this kind optical fiber, easily realize the purpose of distributed monitoring.
The above; it is only preferred embodiment of the present utility model; be not that the utility model is imposed any restrictions; every according to the utility model technical spirit to any simple modification, change and equivalent structure transformation that above embodiment does, all still belong in the protection domain of technical solutions of the utility model.
Claims (2)
1. one kind has the different twin-core fiber of transmitting optical signal speed, it is characterized in that: comprise covering (3), the first fibre core (1) and the second fibre core (2), the shape of cross section of described covering (3) is circular, described covering (3) is the silicon dioxide covering, described the first fibre core (1) and the second fibre core (2) are the photonic crystal fibre core, described the first fibre core (1) is hole type fibre core, described the second fibre core (2) is solid fibre core, described the first fibre core (1) and the second fibre core (2) all are positioned at the inside of covering (3), described the first fibre core (1) is different with the exponent of refractive index of the second fibre core (2), the exponent of refractive index of the exponent of refractive index of described the first fibre core (1) and the second fibre core (2) differs and is not less than 5%, the shape of cross section of described the first fibre core (1) and the second fibre core (2) is circle, the cross-sectional diameter of described the second fibre core (2) is greater than the cross-sectional diameter of the first fibre core (1), be provided with a plurality of pores (4) between described the first fibre core (1) and the second fibre core (2), a plurality of described pores (4) evenly arrange.
2. a kind of different twin-core fiber of transmitting optical signal speed that has according to claim 1, it is characterized in that: the exponent of refractive index of described the first fibre core (1) and the second fibre core (2) differs and is not less than 20%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220611223 CN203012176U (en) | 2012-11-16 | 2012-11-16 | Twin-core optical fiber with different optical signal transmission rates |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220611223 CN203012176U (en) | 2012-11-16 | 2012-11-16 | Twin-core optical fiber with different optical signal transmission rates |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203012176U true CN203012176U (en) | 2013-06-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220611223 Expired - Fee Related CN203012176U (en) | 2012-11-16 | 2012-11-16 | Twin-core optical fiber with different optical signal transmission rates |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203012176U (en) |
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2012
- 2012-11-16 CN CN 201220611223 patent/CN203012176U/en not_active Expired - Fee Related
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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: 20130619 Termination date: 20131116 |