CN103135169B - Optical fiber - Google Patents
Optical fiber Download PDFInfo
- Publication number
- CN103135169B CN103135169B CN201310095080.9A CN201310095080A CN103135169B CN 103135169 B CN103135169 B CN 103135169B CN 201310095080 A CN201310095080 A CN 201310095080A CN 103135169 B CN103135169 B CN 103135169B
- Authority
- CN
- China
- Prior art keywords
- core
- fiber
- optical fiber
- circular
- cladding
- 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.)
- Expired - Fee Related
Links
- 239000013307 optical fiber Substances 0.000 title claims abstract description 39
- 239000000835 fiber Substances 0.000 claims abstract description 67
- 238000005253 cladding Methods 0.000 abstract description 23
- 230000008878 coupling Effects 0.000 abstract description 13
- 238000010168 coupling process Methods 0.000 abstract description 13
- 238000005859 coupling reaction Methods 0.000 abstract description 13
- 230000005540 biological transmission Effects 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
Landscapes
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Abstract
本发明涉及波导介质技术领域，尤其涉及一种光纤。该光纤包括第一光纤主体和第二光纤主体，第一光纤主体包括第一包层和第一圆形纤芯；所述第一包层包裹在所述第一圆形纤芯的外表面；第二光纤主体包括第二包层、第二圆形纤芯和第三纤芯；第二圆形纤芯包裹在所述第三纤芯的外表面；第二包层包裹在所述第二圆形纤芯的外表面；第三纤芯的折射率大于第二圆形纤芯的折射率。本发明提供的光纤，使得传输角度相对较小的光纤在新的折射率临界面发生全反射，使部分光束缚在折射率更高的纤芯内，这样在原有纤芯内，又增加了一层新的波导，使得能量集中度会增加，进而改善光束质量，增加光纤传输距离及耦合效率。
The invention relates to the technical field of waveguide media, in particular to an optical fiber. The optical fiber includes a first fiber body and a second fiber body, the first fiber body includes a first cladding and a first circular core; the first cladding is wrapped around the outer surface of the first circular core; The second optical fiber body includes a second cladding, a second circular core and a third core; the second circular core is wrapped on the outer surface of the third core; the second cladding is wrapped on the second The outer surface of the circular core; the refractive index of the third core is greater than that of the second circular core. The optical fiber provided by the present invention makes the optical fiber with a relatively small transmission angle undergo total reflection at the new critical plane of refractive index, so that part of the light beam is bound in the fiber core with a higher refractive index, so that in the original fiber core, another A new layer of waveguide will increase the energy concentration, thereby improving the beam quality, increasing the fiber transmission distance and coupling efficiency.
Description
技术领域technical field
本发明涉及波导介质技术领域，尤其涉及一种能提高光纤内能量集中度的光纤。The invention relates to the technical field of waveguide media, in particular to an optical fiber capable of improving energy concentration in the optical fiber.
背景技术Background technique
通常的光纤是由纤芯和包层两部分构成。包层将光能量束缚在光纤纤芯内，光能量进而在纤芯中传输。在传输激光光束能量等应用情况下，实际激光光束在光纤纤芯内的能量集中度（可聚焦度）是客观衡量光束质量的重要依据。在光纤传输耦合过程中，能量集中度会影响传输耦合效率，会对实际应用产生很严重的影响。因此，提高能量集中度，对增加光纤传输距离、增加光束质量及耦合效率具有重要意义。A common optical fiber is composed of two parts, the core and the cladding. The cladding confines the light energy within the fiber core, where the light energy is then transmitted. In applications such as transmitting laser beam energy, the energy concentration (focusability) of the actual laser beam in the fiber core is an important basis for objectively measuring the beam quality. In the process of optical fiber transmission coupling, the energy concentration will affect the transmission coupling efficiency, which will have a serious impact on practical applications. Therefore, improving the energy concentration is of great significance for increasing the optical fiber transmission distance, increasing the beam quality and coupling efficiency.
发明内容Contents of the invention
（一）要解决的技术问题(1) Technical problems to be solved
本发明要解决的技术问题是：如何提供一种结构简单且能量集中度较高的光纤。The technical problem to be solved by the present invention is: how to provide an optical fiber with simple structure and high energy concentration.
（二）技术方案(2) Technical solutions
为解决上述问题，本发明提供了一种光纤包括第一光纤主体和第二光纤主体，所述第一光纤主体包括第一包层和第一圆形纤芯；所述第一包层包裹在所述第一圆形纤芯的外表面；In order to solve the above problems, the present invention provides an optical fiber including a first fiber body and a second fiber body, the first fiber body includes a first cladding and a first circular core; the first cladding is wrapped in an outer surface of the first circular core;
所述第二光纤主体包括第二包层、第二圆形纤芯和第三纤芯；所述第二圆形纤芯包裹在所述第三纤芯的外表面；所述第二包层包裹在所述第二圆形纤芯的外表面；所述第三纤芯的折射率大于第二圆形纤芯的折射率。The second optical fiber body includes a second cladding, a second circular core and a third core; the second circular core is wrapped on the outer surface of the third core; the second cladding Wrapped on the outer surface of the second circular fiber core; the refractive index of the third fiber core is greater than the refractive index of the second circular fiber core.
进一步地，所述第一圆形纤芯的直径与第二圆形纤芯的直径相同。Further, the diameter of the first circular fiber core is the same as that of the second circular fiber core.
进一步地，所述第一包层的厚度与第二包层的厚度相同。Further, the thickness of the first cladding layer is the same as that of the second cladding layer.
进一步地，所述第三纤芯的剖面为圆形、方形或椭圆形。Further, the cross section of the third core is circular, square or elliptical.
（三）有益效果(3) Beneficial effects
本发明提供的光纤，通过设置折射率更高的多芯纤芯单元与原纤芯形成一层新的波导，使部分发散角更小的光束缚新的波导内，使得能量集中度会增加，进而改善光束质量，增加光纤传输距离及耦合效率。In the optical fiber provided by the present invention, a layer of new waveguide is formed by setting a multi-core fiber unit with a higher refractive index and the original fiber core, so that part of the light beam with a smaller divergence angle is trapped in the new waveguide, so that the energy concentration will increase. In turn, the beam quality is improved, and the fiber transmission distance and coupling efficiency are increased.
附图说明Description of drawings
图1（a）为本发明第一光纤主体的纵向示意图；Fig. 1(a) is a schematic longitudinal view of the first optical fiber body of the present invention;
图1（b）为本发明第一光纤主体的剖面示意图；Figure 1(b) is a schematic cross-sectional view of the first optical fiber body of the present invention;
图1（c）为本发明第一光纤主体的剖面折射率分布图；Figure 1(c) is a cross-sectional refractive index distribution diagram of the first optical fiber body of the present invention;
图2（a）为本发明第二光线主体的纵向示意图；Fig. 2(a) is a longitudinal schematic diagram of the second ray body of the present invention;
图2（b）为本发明第一光纤主体的剖面示意图；Figure 2(b) is a schematic cross-sectional view of the first optical fiber body of the present invention;
图2（c）为本发明第一光纤主体剖面折射率分布图；Fig. 2(c) is a distribution diagram of the refractive index of the main body section of the first optical fiber of the present invention;
图3是本发明光纤总体结构的纵向示意图；Fig. 3 is a longitudinal schematic diagram of the overall structure of the optical fiber of the present invention;
图4（a）和4（b）分别为本发明实施例一中耦合等尺寸的普通光纤后的能量分布图及耦合本发明后的能量分布图；Figures 4(a) and 4(b) are the energy distribution diagram after coupling common optical fibers of the same size and the energy distribution diagram after coupling the present invention in Embodiment 1 of the present invention;
图5（a）和5（b）分别为本发明实施例二中耦合等尺寸的普通光纤后的能量分布图及耦合本发明后的能量分布图；Figures 5(a) and 5(b) are respectively the energy distribution diagram after coupling common optical fibers of the same size and the energy distribution diagram after coupling the present invention in Embodiment 2 of the present invention;
图6（a）和6（b）分别为本发明实施例三中耦合等尺寸的普通光纤后的能量分布图及耦合本发明后的能量分布图。Figures 6(a) and 6(b) are respectively the energy distribution diagram after coupling common optical fibers of the same size and the energy distribution diagram after coupling the present invention in Embodiment 3 of the present invention.
具体实施方式Detailed ways
下面结合附图和实施例，对本发明的具体实施方式作进一步详细描述。以下实施例用于说明本发明，但不用来限制本发明的范围。The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
如图3所示，本发明实施例提供的光纤包括：第一光纤主体和第二光纤主体。As shown in FIG. 3 , the optical fiber provided by the embodiment of the present invention includes: a first optical fiber main body and a second optical fiber main body.
具体的，参考图1（a）至图1（c），本实施例中的第一光纤主体包括第一包层101和第一圆形纤芯102；第一包层101包裹在所述第一圆形纤芯102的外表面。Specifically, referring to FIG. 1(a) to FIG. 1(c), the first fiber body in this embodiment includes a first cladding 101 and a first circular core 102; the first cladding 101 is wrapped around the first The outer surface of a circular core 102.
参考图2（a）至图2（c），本实施例中的第二光纤主体包括第二包层201、第二圆形纤芯202和第三纤芯203；所述第二圆形纤芯202包裹在所述第三纤芯203的外表面；所述第二包层201包裹在所述第二圆形纤芯202的外表面；所述第三纤芯203的折射率大于第二圆形纤芯202的折射率。2(a) to 2(c), the second fiber body in this embodiment includes a second cladding 201, a second circular core 202 and a third core 203; the second circular fiber The core 202 is wrapped on the outer surface of the third fiber core 203; the second cladding 201 is wrapped on the outer surface of the second circular fiber core 202; the refractive index of the third fiber core 203 is greater than that of the second The refractive index of the circular core 202.
其中，设置第一圆形纤芯102的直径与第二圆形纤芯202的直径相同，第一包层101的厚度与第二包层201的厚度相同。Wherein, the diameter of the first circular core 102 is set to be the same as that of the second circular core 202 , and the thickness of the first cladding 101 is the same as that of the second cladding 201 .
其中，第一圆形纤芯102的折射率与第二圆形纤芯202的折射率相比，可以相同也可以不同，具体可根据实际需求而定。第一包层101的折射率与第二包层201的折射率相比，可以相同也可以不同，具体可根据实际需求而定。Wherein, the refractive index of the first circular fiber core 102 and the refractive index of the second circular fiber core 202 may be the same or different, which may be determined according to actual requirements. Compared with the refractive index of the second cladding layer 201, the refractive index of the first cladding layer 101 may be the same or different, which may be determined according to actual requirements.
其中，第三纤芯203的剖面可以为圆形，也可以为形如方形、椭圆形等非圆形。Wherein, the cross section of the third core 203 may be circular, or may be non-circular such as square, ellipse or the like.
光经过本发明提供的光纤后，折射率更高的多芯纤芯单元与原纤芯形成一层新的波导，使部分发散角更小的光束缚新的波导内，使得能量集中度会增加，进而改善光束质量，增加光纤传输距离及耦合效率。After the light passes through the optical fiber provided by the invention, the multi-core fiber unit with higher refractive index and the original fiber core form a new layer of waveguide, so that some light beams with smaller divergence angles are trapped in the new waveguide, so that the energy concentration will increase. , thereby improving the beam quality, increasing the fiber transmission distance and coupling efficiency.
光经过本发明提供的光纤后，能量集中度会增加，下面以更为具体的实施例对本发明进行说明：After the light passes through the optical fiber provided by the present invention, the energy concentration will increase. The present invention will be described in more specific embodiments below:
实施例一Embodiment one
波长在1064nm的光耦合进光纤，光纤的第一光纤主体的长度为0.5m，数值孔径为NA=0.22；第二光纤主体的长度为0.5m，第二包层201和第二圆形纤芯202之间的数值孔径NA=0.22，第三圆形纤芯和第三纤芯203之间的数值孔径NA=0.1，其中，第二圆形纤芯202的直径为200um，第三纤芯203为圆形纤芯，在该第三圆形纤芯的直径为100um的情况下，能量集中度由原来的22.034%增加到33.408%。参考图4（a）和4（b）。Light with a wavelength of 1064nm is coupled into the optical fiber, the length of the first fiber body of the fiber is 0.5m, and the numerical aperture is NA=0.22; the length of the second fiber body is 0.5m, the second cladding 201 and the second circular core The numerical aperture NA=0.22 between 202, the numerical aperture NA=0.1 between the third circular fiber core and the third fiber core 203, wherein, the diameter of the second circular fiber core 202 is 200um, the third fiber core 203 It is a circular fiber core, and when the diameter of the third circular fiber core is 100um, the energy concentration ratio increases from the original 22.034% to 33.408%. Refer to Figures 4(a) and 4(b).
实施例二Embodiment two
波长在1064nm的光耦合进光纤，光纤的第一光纤主体的长度为0.5m，数值孔径为NA=0.22；第二光纤主体的长度为0.5m，第二包层201和第二圆形纤芯202之间的数值孔径NA=0.22，其中，第三纤芯为方形纤芯，该方形纤芯和第二圆形纤芯202之间的数值孔径NA=0.1，第二圆形纤芯202的直径为200um，方形纤芯为正方形，边长为70um，方形纤芯为中心对称，对称轴与Z轴重合的情况下，能量集中度由原来的22.387%增加到30.609%。参考图5（a）和5（b）。Light with a wavelength of 1064nm is coupled into the optical fiber, the length of the first fiber body of the fiber is 0.5m, and the numerical aperture is NA=0.22; the length of the second fiber body is 0.5m, the second cladding 201 and the second circular core The numerical aperture NA=0.22 between 202, wherein, the 3rd fiber core is square fiber core, the numerical aperture NA=0.1 between this square fiber core and the second circular fiber core 202, the second circular fiber core 202 The diameter is 200um, the square core is square, the side length is 70um, the square core is centrally symmetrical, and when the symmetry axis coincides with the Z axis, the energy concentration increases from the original 22.387% to 30.609%. Refer to Figures 5(a) and 5(b).
实施例三Embodiment three
波长在1064nm的光耦合进光纤，光纤的第一光纤主体的长度为0.5m，数值孔径为NA=0.22；第二光纤主体的长度为0.5m，第二包层201和第二圆形纤芯202之间的数值孔径NA=0.22，其中，第三纤芯为椭圆纤芯，该椭圆纤芯和第二圆形纤芯202之间的数值孔径NA=0.1，第二圆形纤芯的直径为200um，该椭圆纤芯主半径为50um，次半径为30um的情况下，能量集中度由原来的22.915%增加到30.185%。参考图6（a）和6（b）。Light with a wavelength of 1064nm is coupled into the optical fiber, the length of the first fiber body of the fiber is 0.5m, and the numerical aperture is NA=0.22; the length of the second fiber body is 0.5m, the second cladding 201 and the second circular core The numerical aperture NA=0.22 between 202, wherein, the 3rd fiber core is ellipse fiber core, the numerical aperture NA=0.1 between this ellipse fiber core and the second circular fiber core 202, the diameter of the second circular fiber core When the primary radius of the elliptical core is 50um and the secondary radius is 30um, the energy concentration increases from 22.915% to 30.185%. Refer to Figures 6(a) and 6(b).
上述实施例提供的光纤具有如下优点：本发明提供的光纤，使得传输角度相对较小的光纤在新的折射率临界面发生全反射，使部分光束缚在折射率更高的纤芯内，这样在原有纤芯内，又增加了一层新的波导，使得能量集中度会增加，进而改善光束质量，增加光纤传输距离及耦合效率。The optical fiber provided by the above-mentioned embodiments has the following advantages: the optical fiber provided by the present invention makes the optical fiber with a relatively small transmission angle undergo total reflection at the new critical plane of refractive index, so that part of the light beam is bound in the core with a higher refractive index, so that In the original fiber core, a new layer of waveguide is added to increase the energy concentration, thereby improving the beam quality, increasing the fiber transmission distance and coupling efficiency.
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明技术原理的前提下，还可以做出若干改进和替换，这些改进和替换也应视为本发明的保护范围。The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, some improvements and replacements can also be made, these improvements and replacements It should also be regarded as the protection scope of the present invention.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310095080.9A CN103135169B (en) | 2013-03-22 | 2013-03-22 | Optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310095080.9A CN103135169B (en) | 2013-03-22 | 2013-03-22 | Optical fiber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103135169A CN103135169A (en) | 2013-06-05 |
| CN103135169B true CN103135169B (en) | 2015-02-18 |
Family
ID=48495244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310095080.9A Expired - Fee Related CN103135169B (en) | 2013-03-22 | 2013-03-22 | Optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103135169B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101622560A (en) * | 2007-03-05 | 2010-01-06 | 株式会社藤仓 | Photonic band gap fiber |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9347271B2 (en) * | 2008-10-17 | 2016-05-24 | Foro Energy, Inc. | Optical fiber cable for transmission of high power laser energy over great distances |
-
2013
- 2013-03-22 CN CN201310095080.9A patent/CN103135169B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101622560A (en) * | 2007-03-05 | 2010-01-06 | 株式会社藤仓 | Photonic band gap fiber |
Non-Patent Citations (1)
| Title |
|---|
| 低损耗低非线性高负色散光子晶体光纤的优化设计;张亚妮;《物理学报》;20120831;第61卷(第8期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103135169A (en) | 2013-06-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103728696B (en) | A kind of 1 �� N fiber coupler | |
| JP5876612B2 (en) | Fiber optic coupler for combining a signal beam with a non-circular light beam | |
| US9348086B2 (en) | Few-mode optical fibers | |
| CN103149638A (en) | Optical fiber coupler | |
| CN102540324A (en) | Dual-band orthogonal single polarization single mode photonic crystal fiber | |
| CN110221381B (en) | Node type hollow anti-resonance photonic crystal fiber and preparation method thereof | |
| CN101464538A (en) | Photonic crystal fiber with ultra-high double refraction and ultra-low limitation loss | |
| CN101561535A (en) | Method for fusing hollow-core photonic crystal fiber and single mode fiber | |
| CN103913801A (en) | Novel pohotonic crystal fiber | |
| CN101140174A (en) | A Photonic Crystal Fiber Sensing Device Based on Cladding Light Guidance | |
| CN104297837A (en) | Single-core photonic crystal fiber polarization splitter | |
| CN113721323B (en) | Novel multi-core optical fiber coupling device and preparation method | |
| CN106226867A (en) | A kind of optical fiber high-order mode formula peels off device | |
| JPWO2014034726A1 (en) | Optical fiber coupling member and method of manufacturing optical fiber coupling member | |
| JP2017201367A5 (en) | ||
| CN102279437A (en) | Mixed light guide elliptical double-core photonic crystal fiber | |
| CN103728694B (en) | A kind of broadband optical fiber mode converter | |
| CN102338905B (en) | Optical fiber for transmitting terahertz waves | |
| CN103135169B (en) | Optical fiber | |
| CN103018820B (en) | Flat-top optical fiber | |
| CN101464541B (en) | Optical fiber beam divider based on solid core photonic crystal fiber with high refractive index | |
| CN103135166B (en) | Optical fiber capable of improving energy concentration inside optical fiber | |
| CN105807365A (en) | Photonic crystal fiber | |
| CN203561768U (en) | Optical collimator | |
| CN116699754A (en) | High-birefringence hollow anti-resonance optical fiber applied to near infrared band (1.3-1.9 mu m) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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: 20150218 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |