CN103135166B - Optical fiber capable of improving energy concentration inside optical fiber - Google Patents
Optical fiber capable of improving energy concentration inside optical fiber Download PDFInfo
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- CN103135166B CN103135166B CN201310093488.2A CN201310093488A CN103135166B CN 103135166 B CN103135166 B CN 103135166B CN 201310093488 A CN201310093488 A CN 201310093488A CN 103135166 B CN103135166 B CN 103135166B
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 45
- 239000000835 fiber Substances 0.000 claims abstract description 90
- 238000010168 coupling process Methods 0.000 abstract description 9
- 230000008878 coupling Effects 0.000 abstract description 8
- 238000005859 coupling reaction Methods 0.000 abstract description 8
- 230000005540 biological transmission Effects 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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Abstract
The invention relates to the technology of waveguide media, in particular to an optical fiber capable of improving energy concentration inside the optical fiber. The optical fiber comprises a first optical fiber main body and a second optical fiber main body. The first optical fiber main body comprises a first wrapping layer and a first circular fiber core. The first wrapping layer is wrapped on the outer surface of the circular fiber core. The second optical fiber main body comprises a second wrapping layer, a second circular fiber core and a multicore optical fiber unit. The second circular fiber core is wrapped on the outer surface of the multicore optical fiber unit. The first wrapping layer is wrapped on the outer surface of the second circular fiber core. The refractive index of the multicore optical fiber unit is larger than that of the second circular fiber core. Through arrangement of the multicore optical fiber unit with higher refractive index to form a layer of new waveguide with an original fiber core, the fiber enables part of light beams with smaller divergence angles to be constrained in the new waveguide, enables the energy concentration to be increased, improves quality of the light beams, and increases optical fiber transmission distance and coupling efficiency.
Description
Technical field
The present invention relates to waveguide medium technical field, relate in particular to a kind of optical fiber that can improve optical fiber self-energy concentration degree.
Background technology
Common optical fiber is to consist of fibre core and covering two parts.Covering is strapped in luminous energy in fiber core, luminous energy and then transmit in fibre core.Under applicable cases such as transmission laser beam energy etc., the encircled energy of practical laser light beam in fiber core (can degree of focus) is the important evidence of objective measurement beam quality.In Optical Fiber Transmission coupling process, encircled energy can affect transmission coupling efficiency, can produce very serious impact to practical application.Therefore, improve encircled energy, significant to increasing Optical Fiber Transmission distance, increase beam quality and coupling efficiency.
Summary of the invention
(1) technical matters that will solve
The technical problem to be solved in the present invention is: how a kind of simple in structure and optical fiber that encircled energy is higher is provided.
(2) technical scheme
For addressing the above problem, the invention provides a kind of optical fiber that can improve optical fiber self-energy concentration degree, comprise the first fiber body and the second fiber body, described the first fiber body comprises the first covering and the first circular core; Described the first covering is wrapped in the outside surface of described circular core;
Described the second fiber body comprises the second covering, the second circular core and multi-core fiber unit; Described the second circular core is wrapped in the outside surface of described multi-core fiber unit; Described the first covering is wrapped in the outside surface of described the second circular core;
The refractive index of multi-core fiber unit is greater than the refractive index of the second circular core.
Further, the diameter of described the first circular core is identical with the diameter of the second circular core.
Further, the thickness of described the first covering is identical with the thickness of the second covering.
Further, symmetric shape centered by the section of described multi-core fiber unit.
Further, the axis of symmetry of described multi-core fiber unit is parallel with Z axis.
Further, comprise five sub-fibre cores, described five sub-fibre cores are arranged with " ten " font, and the axis of symmetry of the dynatron fibre core in described five sub-fibre cores overlaps with Z axis.
Further, the radius of described five sub-fibre cores is identical.
(3) beneficial effect
Optical fiber provided by the invention, by refractive index more much higher core fibre core unit and former fibre core are set, form the waveguide that one deck is new, the light beam that the part angle of divergence is less is tied up in new waveguide, encircled energy can be increased, and then improve beam quality, increase Optical Fiber Transmission distance and coupling efficiency.
Accompanying drawing explanation
Fig. 1 (a) is longitudinal schematic diagram of the present invention's the first fiber body;
Fig. 1 (b) is the diagrammatic cross-section of the present invention's the first fiber body;
Fig. 1 (c) is the refractive index profile distribution plan of the present invention's the first fiber body;
Fig. 2 (a) is longitudinal schematic diagram of the present invention's the second light main body;
Fig. 2 (b) is the diagrammatic cross-section of the present invention's the first fiber body;
Fig. 2 (c) is the present invention's the first fiber body refractive index profile distribution plan;
Fig. 3 is longitudinal schematic diagram of optical fiber general structure of the present invention;
Fig. 4 (a) and 4(b) be respectively the ordinary optic fibre of the equidimension that is coupled in the embodiment of the present invention one after energy profile and the energy profile after coupling the present invention;
Fig. 5 (a) and 5(b) be respectively the ordinary optic fibre of the equidimension that is coupled in the embodiment of the present invention two after energy profile and the energy profile after coupling the present invention;
Fig. 6 (a) and 6(b) be respectively the ordinary optic fibre of the equidimension that is coupled in the embodiment of the present invention three after energy profile and the energy profile after coupling the present invention.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples are used for illustrating the present invention, but are not used for limiting the scope of the invention.
As shown in Figure 3, the optical fiber that can improve optical fiber self-energy concentration degree that the embodiment of the present invention provides comprises: the first fiber body and the second fiber body.
Concrete, with reference to figure 1(a) to Fig. 1 (c), the first fiber body in the present embodiment comprises the first covering 101 and the first circular core 102; The first covering 101 is wrapped in the outside surface of described the first circular core 102.
With reference to figure 2(a) to Fig. 2 (c), the second fiber body in the present embodiment comprises the second covering 201, the second circular core 202 and multi-core fiber unit 203; Described the second circular core 202 is wrapped in the outside surface of described multi-core fiber unit 203; Described the second covering 201 is wrapped in the outside surface of described the second circular core 202.
Wherein, the diameter that the first circular core 102 is set is identical with the diameter of the second circular core 202, and the thickness of the first covering 101 is identical with the thickness of the second covering 201.
Wherein, the refractive index of the first circular core 102 is compared with the refractive index of the second circular core 202, can be the same or different, and specifically can determine according to the actual requirements.The refractive index of the first covering 101 is compared with the refractive index of the second covering 201, can be the same or different, and specifically can determine according to the actual requirements.
With reference to figure 2(c), symmetric shape centered by the section of multi-core fiber unit 203, and the axis of symmetry of multi-core fiber unit 203 is parallel with Z axis; The refractive index of multi-core fiber unit 203 is greater than the refractive index of the second circular core 202.In the present embodiment, multi-core fiber unit 203, including, but not limited to five sub-fibre cores, specifically can be determined according to the actual requirements.
Light is after optical fiber provided by the invention, refractive index more much higher core fibre core unit and former fibre core form the waveguide that one deck is new, and the light beam that the part angle of divergence is less is tied up in new waveguide, and encircled energy can be increased, and then improve beam quality, increase Optical Fiber Transmission distance and coupling efficiency.
Encircled energy can increase, and with specific embodiment, the present invention is further described below:
Embodiment mono-
Wavelength enters optical fiber in the optically-coupled of 1064nm: in optical fiber, the length of the first fiber body is 0.5m, and numerical aperture is NA=0.22, the length of the second fiber body is 2cm, numerical aperture NA=0.22 between the second covering 201 and the second circular core 202, numerical aperture NA=0.1 between multi-core fiber unit 203 and the second circular core 202, the diameter of the second circular core is 200um, multi-core fiber unit 203 specifically comprises five sub-fibre cores, described five sub-fibre cores are arranged with cruciform, the axis of symmetry of middle fibre core overlaps with Z axis, the radius of described every sub-fibre core is identical, its radius is in the situation of 15um, encircled energy is increased to 26.744% by original 20.812%, with reference to figure 4(a) and 4(b).
Embodiment bis-
Wavelength enters optical fiber in the optically-coupled of 1064nm, and in optical fiber, the length of the first fiber body is 0.5m, and numerical aperture is NA=0.22; The length of the second fiber body is 0.5m, numerical aperture NA=0.22 between the second covering and the second circular core, numerical aperture NA=0.1 between multi-core fiber unit 203 and the second circular core, the diameter of the second circular core is 200um, multi-core fiber unit 203 specifically comprises five sub-fibre cores, these five sub-fibre cores are arranged with cruciform, the axis of symmetry of middle fibre core overlaps with Z axis, five fiber core radius are identical, in situation for 15um, encircled energy is increased to 16.188% by original 14.243%.With reference to figure 5(a) and 5(b).
Embodiment tri-
Wavelength enters optical fiber in the optically-coupled of 1064nm, and in optical fiber, the length of the first fiber body is 0.5m, and numerical aperture is NA=0.22; The length of the second fiber body is 0.5m, numerical aperture NA=0.22 between the second covering and the second circular core, numerical aperture NA=0.1 between multi-core fiber unit 203 and the second circular core 202, the diameter of the second circular core 202 is 400um, multi-core fiber unit 203 comprises five sub-fibre cores, these five sub-fibre cores are arranged with cruciform, the axis of symmetry of middle fibre core overlaps with Z axis, five fiber core radius are identical, in situation for 25um, encircled energy is increased to 28.732% by original 28.024%, with reference to figure 6(a) and 6(b).
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the technology of the present invention principle; can also make some improvement and replacement, these improvement and replacement also should be considered as protection scope of the present invention.
Claims (6)
1. the optical fiber that can improve optical fiber self-energy concentration degree, it is characterized in that, described optical fiber comprises the first fiber body and the second fiber body, and described the first fiber body is sequentially docked with described the second fiber body, and described the first fiber body comprises the first covering and the first circular core; Described the first covering is wrapped in the outside surface of described circular core;
Described the second fiber body comprises the second covering, the second circular core and multi-core fiber unit; Described the second circular core is wrapped in the outside surface of described multi-core fiber unit; Described the first covering is wrapped in the outside surface of described the second circular core; The refractive index of described multi-core fiber unit is greater than the refractive index of the second circular core, and the diameter of described the first circular core is identical respectively with diameter and the refractive index of the second circular core.
2. optical fiber according to claim 1, is characterized in that, the thickness of described the first covering is identical with the thickness of the second covering.
3. optical fiber according to claim 1, is characterized in that, symmetric shape centered by the section of described multi-core fiber unit.
4. optical fiber according to claim 3, is characterized in that, the axis of symmetry of described multi-core fiber unit is parallel with Z axis.
5. optical fiber according to claim 4, is characterized in that, comprises that described multi-core fiber unit comprises five sub-fibre cores, and described five sub-fibre cores are arranged with " ten " font, and the axis of symmetry of the dynatron fibre core in described five sub-fibre cores overlaps with Z axis.
6. optical fiber according to claim 5, is characterized in that, the radius of described five sub-fibre cores is identical.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310093488.2A CN103135166B (en) | 2013-03-22 | 2013-03-22 | Optical fiber capable of improving energy concentration inside optical fiber |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310093488.2A CN103135166B (en) | 2013-03-22 | 2013-03-22 | Optical fiber capable of improving energy concentration inside optical fiber |
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| CN103135166A CN103135166A (en) | 2013-06-05 |
| CN103135166B true CN103135166B (en) | 2014-11-26 |
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| CN201310093488.2A Expired - Fee Related CN103135166B (en) | 2013-03-22 | 2013-03-22 | Optical fiber capable of improving energy concentration inside optical fiber |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102096145A (en) * | 2010-12-31 | 2011-06-15 | 北京交通大学 | Multi-core polarization maintaining fiber and manufacturing method thereof |
| CN202305881U (en) * | 2011-11-09 | 2012-07-04 | 中国计量学院 | Multi-core fiber and coupler for a plurality of single-core fibers |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013522680A (en) * | 2010-03-16 | 2013-06-13 | オーエフエス ファイテル，エルエルシー | Multi-core fiber connector for multi-core optical fiber cable |
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- 2013-03-22 CN CN201310093488.2A patent/CN103135166B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102096145A (en) * | 2010-12-31 | 2011-06-15 | 北京交通大学 | Multi-core polarization maintaining fiber and manufacturing method thereof |
| CN202305881U (en) * | 2011-11-09 | 2012-07-04 | 中国计量学院 | Multi-core fiber and coupler for a plurality of single-core fibers |
Non-Patent Citations (1)
| Title |
|---|
| 张晓路，等.多芯双包层光纤激光器相干合束纤芯最优化排布.《强激光与粒子束》.2011,第23卷(第8期), * |
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| CN103135166A (en) | 2013-06-05 |
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