WO2020186696A1 - 光子晶体光纤及其制备方法 - Google Patents

光子晶体光纤及其制备方法 Download PDF

Info

Publication number
WO2020186696A1
WO2020186696A1 PCT/CN2019/103381 CN2019103381W WO2020186696A1 WO 2020186696 A1 WO2020186696 A1 WO 2020186696A1 CN 2019103381 W CN2019103381 W CN 2019103381W WO 2020186696 A1 WO2020186696 A1 WO 2020186696A1
Authority
WO
WIPO (PCT)
Prior art keywords
optical fiber
photonic crystal
air holes
fiber preform
preform
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.)
Ceased
Application number
PCT/CN2019/103381
Other languages
English (en)
French (fr)
Inventor
黄俊昌
雷民
胡浩亮
周峰
李鹤
熊前柱
徐子立
聂琪
潘瑞
万鹏
杨春燕
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Electric Power Research Institute Co Ltd CEPRI
State Grid Corp of China SGCC
Original Assignee
China Electric Power Research Institute Co Ltd CEPRI
State Grid Corp of China SGCC
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by China Electric Power Research Institute Co Ltd CEPRI, State Grid Corp of China SGCC filed Critical China Electric Power Research Institute Co Ltd CEPRI
Priority to JP2019566661A priority Critical patent/JP7061628B2/ja
Publication of WO2020186696A1 publication Critical patent/WO2020186696A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/012—Manufacture of preforms for drawing fibres or filaments
    • C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
    • C03B37/018—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD] by glass deposition on a glass substrate, e.g. by inside-, modified-, plasma- or plasma modified- chemical vapour deposition [ICVD, MCVD, PCVD, PMCVD], i.e. by thin layer coating on the inside or outside of a glass tube or on a glass rod
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
    • C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
    • C03B37/027—Fibres composed of different sorts of glass, e.g. glass optical fibres

Definitions

  • This article relates to the technical field of sensing fibers, such as a rotating photonic crystal fiber applied to an all-fiber current sensor and a preparation method thereof.
  • Photonic crystal fiber also known as microstructure fiber or holey fiber
  • PCF has a more complex refractive index distribution in the cross section, and usually contains pores in different arrangements.
  • the size of these pores is roughly the same as the wavelength of light.
  • the function of the photonic crystal fiber is also related to the size and arrangement of these pores.
  • the special arrangement structure of the air holes in the photonic crystal fiber cladding makes it present many peculiar characteristics compared with traditional optical fibers, such as non-stop single-mode transmission, high birefringence, high nonlinearity, adjustable dispersion and large Unique properties such as mode area have become a hot spot in current research and are widely used in fields such as optical sensing, optical communications, and nonlinear optics.
  • the sensing fiber used is a rotating birefringent fiber.
  • the rotation reduces the linear birefringence in the fiber and increases the internal stress and circular birefringence.
  • the Chinese Invention Patent (CN105541105A) discloses a method and equipment for the preparation of a high-birefringence rotating optical fiber.
  • the optical fiber preparation method adopts the integrated control of rotation and winding, and the preform is sent by the rod feeding device to the drawing furnace to be heated to a molten state
  • the traction of the optical fiber is formed by the speed difference between the fly yoke and the take-up drum, and the rotation of the fly yoke will cause the twist of the optical fiber.
  • the twist can be transferred from bottom to top to the fusion zone, and then rotate in the fiber to achieve the purpose of producing rotating optical fiber.
  • the above is suitable for high-birefringence rotating fibers and other fibers that require a single direction of rotation and require a high rotational speed.
  • the residual linear birefringence in the above-mentioned fibers and the instability of this structure will affect The result of the current measurement has a greater impact.
  • This article provides a photonic crystal fiber and its preparation method, which overcomes the problem of poor sensing effect and easy collapse and deformation of pores in related technologies.
  • the photonic crystal fiber has high circular birefringence and good sensing effect. , Can avoid the collapse and deformation of the pores, and realize the high circularity of the photonic crystal fiber.
  • This article provides a photonic crystal fiber, including a fiber body, a core is provided at the center of the fiber body, a plurality of air holes are arranged in the fiber body, each of the air holes is spiral and the plurality of air holes The rotation directions of the air holes are the same, and on any cross section of the optical fiber body along the radial direction of the optical fiber body, the plurality of air holes are arranged to surround the fiber core.
  • the present invention also provides a method for manufacturing the photonic crystal fiber, which is used to manufacture the photonic crystal fiber described in any one of the above, and the method includes:
  • drawing the optical fiber preform includes:
  • the optical fiber preform is rotated and drawn, and when the optical fiber preform is rotated and drawn, an inert gas is injected into the air hole in the optical fiber body, and the air is maintained by adjusting the pressure of the inert gas and the drawing speed The size of the hole.
  • Figure 1 is a schematic diagram of the photonic crystal fiber herein;
  • Figure 2 is a cross-sectional view of the photonic crystal fiber herein;
  • Figure 3 is a schematic diagram of the influence of different parameters in this paper on the optical fiber circular birefringence.
  • this embodiment provides a photonic crystal fiber, including a fiber body 10, a core 11 is provided at the center of the fiber body 10, and a plurality of continuous rotations are provided in the fiber body 10
  • the air holes 12 are helical and the rotation directions of the air holes 12 are the same.
  • the arrangement of the air holes 12 in any cross section of the optical fiber body 10 in the radial direction is It is arranged in a hexagon around the core 11.
  • the multiple air holes 12 may all be left-threaded or right-threaded, so that the rotation directions of the multiple air holes 12 are the same.
  • the arrangement of the plurality of air holes 12 is a hexagonal symmetrical array arrangement around the core 11; in some embodiments, the arrangement of the plurality of air holes 12 is formed
  • the hexagon (hereinafter referred to as the “hexagon” in this paragraph) is arranged in a centrally symmetrical pattern centered on the center of the core 11; in some embodiments, the hexagon is A regular hexagon with the center of the core 11 as the center is arranged; in some embodiments, the hexagon is one layer, and six layers of the hexagon are arranged around the core 11 In some embodiments, the hexagon includes multiple layers, and each layer of the hexagon consists of six air holes 12 arranged around the core 11
  • the air holes 12 are composed of the hexagonal multi-layers including a hexagonal outer layer and a hexagonal inner layer, and the hexagonal outer layer surrounds the periphery of the hexagonal inner layer.
  • the photonic crystal fiber used in this embodiment includes a fiber body 10, a core 11 is provided at the center of the fiber body 10, a plurality of continuously rotating air holes 12 are provided in the fiber body 10, and the air The holes 12 are in a spiral shape and the rotation directions of the multiple air holes 12 are the same.
  • the rotation space structure of the air holes 12 is used to generate different transmission conditions for left-handed polarized light and right-handed polarized light, thereby having a better circular birefringence effect. , It can provide better sensing effect.
  • the nature of circular birefringence is because a part of the modes transmitted in the core 11 diffuses between the air holes 12, and these radial modes are rotating
  • the optical fiber is rotated to create different transmission conditions for the left-handed and right-handed circular polarization modes, thereby producing a circular birefringence effect, and on any cross section of the optical fiber body 10 along the radial direction, the multiple air holes
  • the arrangement of 12 is a hexagonal symmetrical array arrangement around the core 11, which is beneficial to avoid linear birefringence.
  • the optical fiber body 10 is doped with one or more chemical materials according to a preset weight percentage, and the chemical materials include silicon dioxide and terbium, so as to avoid differences.
  • the chemical material may further include germanium dioxide, trivalent aluminum ions, and trivalent terbium ions (that is, the optical fiber body 10 may further include germanium dioxide, trivalent aluminum ions, and trivalent terbium ions. ), and the weight percentage of the silica occupies more than 90% of the fiber body 10, so that the photonic crystal fiber has better temperature characteristics than the existing sensing fiber, which is beneficial to promote all-fiber current Wide range of applications of sensors.
  • the core 11 does not have the air hole 12. Part of the mode transmitted in the core 11 diffuses into the silica structure between the air holes 12. These radial modes are rotated in the rotating fiber, creating a difference between the left-handed and right-handed circular polarization modes. The transmission conditions, resulting in circular birefringence.
  • the size of the plurality of air holes 12 is equal, and the arrangement of the plurality of air holes 12 is a hexagonal symmetrical array arrangement around the core 11, and the optical fiber body 10 is arranged along any one of the radial directions.
  • the hexagons on the cross-section may include multiple layers, that is, layers including multiple hexagons with the same center and different side lengths.
  • the hexagons are arranged symmetrically, and the rotation rate obtained after calculation is compared with The optical fiber preform with this cross-section is rotated and drawn, so that the obtained photonic crystal fiber can ensure the circular birefringence in the fiber to the greatest extent.
  • This embodiment provides a method for manufacturing a photonic crystal fiber, which is used to manufacture the photonic crystal fiber described in the first embodiment, including the steps of manufacturing an optical fiber preform and a drawing step of the optical fiber preform, wherein the drawing step of the optical fiber preform Including a heating step and a rotating drawing step, and during the rotating drawing, an inert gas is injected into the air hole 12 in the optical fiber body 10, and the pressure of the inert gas and the drawing speed are adjusted to maintain the air hole 12 Size ratio.
  • optical fiber preform becomes the optical fiber body 10 after undergoing the spinning drawing process.
  • This embodiment provides a method for preparing a photonic crystal fiber, which is used to fabricate the photonic crystal fiber described in the first embodiment, including the steps of preparing the fiber preform and the drawing step of the fiber preform, so as to ensure the smooth production of the fiber.
  • the drawing step of the optical fiber preform includes a heating step and a rotating drawing step, and during the rotating drawing, an inert gas is injected into the air hole 12 in the optical fiber body 10, and the pressure of the inert gas and the drawing speed are adjusted. Maintaining the size ratio of the air holes 12 can avoid the collapse and deformation of the air holes 12, so that the formed optical fiber is not easily deformed, has a high circular birefringence, and is beneficial to avoid linear birefringence.
  • the heating step is: heating one end of the optical fiber preform to melt it. Specifically, the head of the optical fiber preform is heated by electric heating, and heated to a molten state to form an optical fiber, thereby facilitating wire drawing.
  • the rotating drawing step is: drawing the heated optical fiber preform while rotating the rod body of the optical fiber preform along the axial direction of the optical fiber body at a uniform speed, thereby facilitating good drawing.
  • the manufacturing steps of the optical fiber preform include: preparing a capillary; forming the capillary stack into a shape of a designed size; and using a plasma chemical vapor deposition (Plasma Chemical Vapor Deposition, PCVD) process to make a cladding.
  • PCVD plasma chemical vapor deposition
  • the production of the cladding refers to the use of a PCVD deposition method to produce the optical fiber preform.
  • the inner cavity of the capillary tube can form the prepared air hole of the photonic crystal fiber after the spinning drawing process.
  • a photonic crystal fiber corresponding to the required working wavelength can be obtained. Since different parameters have different effects on the circular birefringence of the fiber, it is necessary to find the appropriate parameters to obtain the optimal circular birefringence. Specifically, if the diameter of the air holes 12 is d, the hole spacing is ⁇ , the working wavelength is ⁇ , and the rotation rate is ⁇ . In order to make the photonic crystal fiber obtain better circular birefringence, two parameters d/ ⁇ and ⁇ / ⁇ can be set. Wherein, when the ratio of the diameter of the air holes 12 to the hole spacing of the air holes 12 is 0.25-0.9, a better circular birefringence can be obtained.
  • BC/ ⁇ can take the maximum value.
  • the ratio of the diameter of the air hole 12 to the distance between the air holes 12 is 0.6
  • the rotating photonic crystal fiber provides a relatively constant BC/ ⁇ value in a wide wavelength range, and the circular birefringence is the best.
  • the ratio of the hole spacing of the air holes 12 to the working wavelength is 1.1-2
  • a suitable structure can be selected according to the wavelength to obtain better performance.
  • Lower circular birefringence When the ratio of the hole spacing of the air holes 12 to the working wavelength is 1.5, the circular birefringence is the best.
  • the distance between two adjacent air holes 12 is substantially the same, and the diameter of each air hole 12 is substantially the same.
  • the ratio of the air hole spacing ⁇ to the working wavelength ⁇ is the abscissa
  • the ratio of the circular birefringence parameter BC to the rotation rate ⁇ is the ordinate to show multiple fitting curves.
  • Each line of the fitted curve corresponds to the ratio of the diameter d of the air hole to the distance ⁇ of the air hole. If the curve with the smallest average slope among the multiple fitting curves is selected, the ratio of the air hole diameter d to the air hole spacing ⁇ corresponding to the curve is obtained, and each parameter is obtained according to the fitting function corresponding to the curve tends to be stable .
  • the curve with the smallest average slope among the multiple fitting curves is selected, and the purpose is to select the most stable curve, which has a long stationary section, and the ordinate is almost unchanged with the change of the abscissa.
  • One end curve interval is selected.
  • the fiber can obtain a relatively constant BC/ ⁇ in a wide wavelength range;
  • the rotation rate ⁇ is obtained by the properties of the fiber material and the expected circular birefringence parameter;
  • the optical fiber section parameters include the diameter of the air holes on the optical fiber section and the air hole spacing; rotating the curve with the smallest average slope among the multiple fitting curves to confirm the parameters can obtain the optical fiber parameters applicable to a wider wavelength range, and the corresponding optical fiber is not only It is suitable for the aforementioned fixed working wavelength, and it is also suitable for working wavelengths within a point before and after it.
  • the method for manufacturing the photonic crystal fiber is used to manufacture the above-mentioned photonic crystal fiber, and the method includes:
  • drawing the optical fiber preform includes:
  • the optical fiber preform is rotated and drawn, and when the optical fiber preform is rotated and drawn, an inert gas is injected into the air hole in the optical fiber body, and the air is maintained by adjusting the pressure of the inert gas and the drawing speed The size of the hole.
  • the heating of the optical fiber preform includes heating one end of the optical fiber preform to melt one end of the optical fiber preform.
  • the rotating and drawing of the optical fiber preform is: drawing the heated optical fiber preform while rotating the rod body of the optical fiber preform at a uniform speed along the axis of the optical fiber body.
  • the manufacturing of the optical fiber preform includes:
  • the cladding layer is made using a plasma chemical vapor deposition process.
  • the method further includes: setting the ratio of the diameter of the air holes to the distance between the air holes to be 0.25-0.9.
  • the method further includes: setting the ratio of the hole spacing of the air holes to the operating wavelength to be 1.1-2.
  • the photonic crystal fiber and the preparation method thereof described herein comprise a fiber body, a core is arranged at the center of the fiber body, and a plurality of continuously rotating air holes are arranged in the fiber body, and the air holes are in a spiral shape. And the rotation direction of the multiple air holes is the same, and the rotating space structure of the air holes is used to generate different transmission conditions for left-handed polarized light and right-handed polarized light, thereby having a better circular birefringence effect and being able to provide better transmission.
  • the arrangement of the plurality of air holes is a hexagonal symmetrical array arrangement around the core, which is beneficial to avoid linear birefringence.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)

Abstract

一种光子晶体光纤及其制备方法，包括光纤本体（10），光纤本体（10）的中心处设有纤芯（11），光纤本体（10）内设有多个空气孔（42），每个空气孔（42）呈螺旋状且多个空气孔（42）的旋向相同，沿光纤本体（10）的径向的任意一个横截面上，多个空气孔（42）的排布为围绕纤芯（11）的排布。

Description

光子晶体光纤及其制备方法
本公开要求在2019年03月19日提交中国专利局、申请号为201910208586.3的中国专利申请的优先权，以上申请的全部内容通过引用结合在本公开中。
技术领域
本文涉及传感光纤的技术领域，例如涉及一种应用于全光纤电流传感器的旋转光子晶体光纤及其制备方法。
背景技术
光子晶体光纤(photonic crystal fiber,简称PCF)又称为微结构光纤或多孔光纤，在横截面上有较复杂的折射率分布，通常含有不同排列形式的气孔，这些气孔的尺度与光波波长大致在同一量级并且贯穿器件的整个长度，光子晶体光纤的功能也与这些气孔的尺寸与排列方式相关。所述光子晶体光纤包层中空气孔的特殊排列结构使其与传统光纤相比，呈现出许多奇异的特性，如无截止的单模传输、高双折射、高非线性、色散可调节及大模面积等独特性质，成为当前研究的一个热点，并被广泛应用于光传感、光通信及非线性光学等领域。
在现有的电流传感中，使用到的传感光纤大多为旋转双折射光纤，通过旋转来减小光纤中的线性双折射，增大内应力和圆双折射。如中国发明专利(CN105541105A)公开了一种高双折射旋转光纤的制备方法和设备，光纤制备方法采用旋转和收丝一体化综合控制，预制棒由送棒装置送至拉丝炉中加热至熔融状态，光纤的牵引由飞叉和收丝鼓的转速差形成，并且飞叉的旋转会造成光纤的扭转，扭转可由下至上传递到熔融区域，进而在光纤内部形成旋转以达到生产旋转光纤的目的。上述适用于高双折射旋转光纤等要求单一方向旋转且对旋转速度要求较高的光纤，但是在实际应用过程中发现，采用上述光纤中残 留的线性双折射以及这种结构的不稳定性会对电流测量的结果造成较大的影响。
发明内容
本文提供了一种光子晶体光纤及其制备方法，克服了相关技术中传感效果差，且气孔易坍塌和变形的问题，所述光子晶体光纤具有较高的圆双折射，并且传感效果好，能避免气孔坍塌和变形，实现了光子晶体光纤的高保圆。
本文提供了一种光子晶体光纤，包括光纤本体，所述光纤本体的中心处设有纤芯，所述光纤本体内设有多个空气孔，每个所述空气孔呈螺旋状且所述多个空气孔的旋向相同，所述光纤本体沿所述光纤本体的径向的任意一个横截面上，所述多个空气孔的排布为围绕所述纤芯的排布。
本发明还提供了一种光子晶体光纤的制备方法，用于制作上述任意一项所述的光子晶体光纤，所述方法包括：
制作光纤预制棒；以及，
将所述光纤预制棒拉丝；
其中，所述将所述光纤预制棒拉丝，包括：
对所述光纤预制棒加热；以及，
将所述光纤预制棒旋转拉丝，并在将所述光纤预制棒旋转拉丝时，向光纤本体中的空气孔注入惰性气体，通过调整所述惰性气体的压强以及拉制的速度来保持所述空气孔的大小。
附图说明
为了使本发明的内容更容易被清楚的理解，下面根据本文的具体实施例并结合附图，对本文作进一步详细的说明，其中
图1是本文光子晶体光纤的示意图；
图2是本文光子晶体光纤的截面图；
图3是本文的不同参数对光纤圆双折射的影响示意图。
具体实施方式
实施例一
如图1和图2所示，本实施例提供一种光子晶体光纤，包括光纤本体10，所述光纤本体10的中心处设有纤芯11，所述光纤本体10内设有多个连续旋转的空气孔12，所述空气孔12呈螺旋状且多个空气孔12的旋向相同，所述光纤本体10沿径向的任意一个横截面上，所述多个空气孔12的排布为围绕所述纤芯11的六边形排布。
示例性地，所述多个空气孔12可以均为左螺纹状，也可以均为右螺纹状，这样所述多个空气孔12的旋向相同。
在一些实施例中，所述多个空气孔12的排布为围绕所述纤芯11的六边形对称阵列排布；在一些实施例中，由所述多个空气孔12的排布形成的六边形(本段下文中，简称为“所述六边形”)，呈以所述纤芯11的中心为中心的中心对称图形设置；在一些实施例中，所述六边形呈以所述纤芯11的中心为中心的正六边形设置；在一些实施例中，所述六边形为一层，所述六边形的一层由六个围绕所述纤芯11排布的所述空气孔12组成；在一些实施例中，所述六边形包括多层，所述六边形的每一层由六个所述空气孔12围绕所述纤芯11排布的所述空气孔12组成，所述六边形的多层包括六边形外层和六边形内层，所述六边形外层围绕于所述六边形内层的外围。
本实施例所述用于光子晶体光纤，包括光纤本体10，所述光纤本体10的中 心处设有纤芯11，所述光纤本体10内设有多个连续旋转的空气孔12，所述空气孔12呈螺旋状且多个空气孔12的旋向相同，利用所述空气孔12的旋转空间结构为左旋偏振光和右旋偏振光产生不同的传输条件，从而具有更好的圆双折射效应，能够提供更好的传感效果，具体地，圆双折射产生的本质是因为在所述纤芯11中传输的模式有一部分扩散到所述空气孔12之间，这些辐射状的模式在旋转光纤中被旋转，为左旋和右旋圆偏振模式创造了不同的传输条件，从而产生了圆双折射效应，且所述光纤本体10沿径向的任意一个横截面上，所述多个空气孔12的排布为围绕所述纤芯11的六边形对称阵列排布，有利于避免线性双折射。
为了提高全光纤电流传感器系统的温度稳定性，所述光纤本体10根据预设重量百分率掺杂一种或多种化学材料组成，且所述化学材料包括二氧化硅和铽，从而有利于避免不同材料的温度特性不同带来的影响。在一些实施例中，所述化学材料还可包括二氧化锗、三价铝离子以及三价铽离子(即，所述光纤本体10还可包括二氧化锗、三价铝离子以及三价铽离子)，且所述二氧化硅的重量百分率占所述光纤本体10的90％以上，这样使所述光子晶体光纤相对于现有的传感光纤具有更好的温度特性，有利于推动全光纤电流传感器的广泛应用。本实施例中，所述纤芯11不设所述空气孔12。所述纤芯11中传输的模式有一部分扩散到所述空气孔12之间的二氧化硅结构中，这些辐射状的模式在旋转光纤中被旋转，为左旋和右旋圆偏振模式创造了不同的传输条件，从而产生了圆双折射。
所述多个空气孔12的大小相等，且所述多个空气孔12的排布为围绕所述纤芯11的六边形对称阵列排布，所述光纤本体10沿径向的任意一个横截面上的六边形可以包括多层，即包括多个中心相同边长不同嵌套在一起的六边形的 层，通过所述六边形对称排布，再通过计算后获得的旋转率对具有该截面的光纤预制棒进行旋转拉制，就可以使获得的光子晶体光纤可最大程度上的保证光纤内呈现圆双折射。
实施例二
本实施例提供一种光子晶体光纤的制备方法，用于制作实施例一所述的光子晶体光纤，包括光纤预制棒的制作步骤和光纤预制棒的拉丝步骤，其中所述光纤预制棒的拉丝步骤包括加热步骤以及旋转拉丝步骤，且在旋转拉丝时，向所述光纤本体10中的空气孔12注入惰性气体，通过调整所述惰性气体的压强以及拉制的速度来保持所述空气孔12的大小比例。
可理解的是，所述光纤预制棒经过旋转拉丝工艺后即为光纤本体10。
本实施例提供一种光子晶体光纤的制备方法，用于制作实施例一所述的光子晶体光纤，包括光纤预制棒的制作步骤和光纤预制棒的拉丝步骤，从而保证光纤的顺利制作，其中所述光纤预制棒的拉丝步骤包括加热步骤以及旋转拉丝步骤，且在旋转拉丝时，向所述光纤本体10中的空气孔12注入惰性气体，通过调整所述惰性气体的压强以及拉制的速度来保持所述空气孔12的大小比例，从而可以避免所述空气孔12的塌缩和变形，使形成的光纤不易发生形变，具有很高的圆双折射，并且有利于避免线性双折射。
所述加热步骤为：对所述光纤预制棒的一端进行加热，使其融化。具体地，采用电加热的方式对所述光纤预制棒的头部进行加热，且加热至熔融状态形成光纤，从而有利于实现拉丝。
所述旋转拉丝步骤为：对加热后的光纤预制棒进行拉丝，同时沿光纤本体轴向匀速旋转所述光纤预制棒的棒体，从而有利于很好的实现拉丝。所述光纤预制棒的制作步骤为：制备毛细管；将所述毛细管堆叠呈为设计尺寸的形状； 使用等离子体化学气相沉积(Plasma Chemical Vapor Deposition，PCVD)工艺制作包层。其中所述制作包层是指采用PCVD的一种沉积方法制造所述光纤预制棒。
需要说明的是，所述毛细管的内腔经过旋转拉丝工艺后可以形成制备的光子晶体光纤的空气孔。
本实施例中，将所述光纤预制棒在预设的拉力及温度条件下，根据旋转率进行拉制，就可以获得对应所需的工作波长的光子晶体光纤。由于不同参数对光纤圆双折射的影响不同，因此需要找到合适的参数，以获得最优的圆双折射。具体地，若所述空气孔12直径为d、孔间距为∧、工作波长为λ以及旋转率为α。为了使所述光子晶体光纤得到更好的圆双折射，可以对d/∧和∧/λ两个参数进行设置。其中，所述空气孔12的直径与所述空气孔12的孔间距的比值为0.25-0.9时，可以得到较好的圆双折射。若圆双折射的参数为BC，当d/∧＝0.37，∧/λ＝1.5时，BC/α可以取到最大值。而当所述空气孔12的直径与所述空气孔12间距的比值为0.6时，旋转光子晶体光纤在宽波长范围内提供相对恒定的BC/α值，圆双折射最好。在这种条件下，所述空气孔12的孔间距与工作波长的比值为1.1-2时，都有相对恒定的BC/α值，此时根据波长选取合适的结构就能获得性能较好但较低的圆双折射。当所述空气孔12的孔间距与工作波长的比值为1.5时，圆双折射最好。
通常而言，同一光子晶体光纤中，相邻两个所述空气孔12之间的间距均基本相同，且每个所述空气孔12的直径基本相同。
如图3所示，以所述空气孔间距∧与工作波长λ的比值为横坐标、以圆双折射参数BC与旋转率α的比值为纵坐标，展示多条拟合曲线，所述多条拟合曲线的每一条对应一个空气孔直径d与空气孔间距∧的比值。若选择所述多条拟 合曲线中平均斜率最小的曲线，获得该曲线对应的空气孔直径d与空气孔间距∧的比值，而根据该曲线趋于平稳段对应的拟合函数就获得各个参数。其中选择多条拟合曲线中平均斜率最小的曲线，其目的是选择一条最平稳的曲线，该曲线具有较长的平稳段，所述平稳段至随着横坐标变化纵坐标几乎是不变的一端曲线区间。具体地，对d/∧＝0.6的这条曲线，其在横坐标∧/λ是1.3-1.8间具有较长的平稳段，该区间下BC/α的值几乎不变；所述旋转光子晶体光纤在宽波长范围内均可获得相对恒定的BC/α；通过光纤材料的属性以及预期的圆双折射参数，获得旋转率α；通过d/∧＝0.6以及∧/λ获得光纤截面参数，其中所述光纤截面参数包括光纤截面上空气孔的直径以及空气孔间距；旋转所述多条拟合曲线中平均斜率最小的曲线进行参数确认可获得适用较宽波长范围的光纤参数，对应的光纤不仅适合前述固定工作波长，还适合在其前后一点范围内工作波长。相较于上述曲线的选择，为了获得更好的圆双折射参数，若选择所述多条拟合曲线中峰值最大的曲线，就可以获得该曲线对应的空气孔直径d与空气孔间距∧的比值，而根据该曲线最大峰值点，就获得所述截面参数以及旋转率。具体地，对d/∧＝0.37这条曲线，其具有最高的峰值，取该峰值对应的点获得BC/α的值以及∧/λ的值，根据已知的工作波长λ值，进而获得各个参数。
在一些实施例中，所述光子晶体光纤的制备方法，用于制作上述的光子晶体光纤，所述方法包括：
制作光纤预制棒；以及，
将所述光纤预制棒拉丝；
其中，所述将所述光纤预制棒拉丝，包括：
对所述光纤预制棒加热；以及，
将所述光纤预制棒旋转拉丝，并在将所述光纤预制棒旋转拉丝时，向光纤 本体中的空气孔注入惰性气体，通过调整所述惰性气体的压强以及拉制的速度来保持所述空气孔的大小。
在一些实施例中，所述对所述光纤预制棒加热为：对所述光纤预制棒的一端进行加热，使所述光纤预制棒的一端融化。
在一些实施例中，所述将所述光纤预制棒旋转拉丝为：对加热后的光纤预制棒进行拉丝，同时沿光纤本体轴向匀速旋转所述光纤预制棒的棒体。
在一些实施例中，所述制作光纤预制棒，包括：
制备毛细管；
将所述毛细管堆叠呈为设计尺寸的形状；
使用等离子体化学气相沉积工艺制作包层。
在一些实施例中，所述方法还包括：设置所述空气孔的直径与所述空气孔间距的比值为0.25-0.9。
在一些实施例中，所述方法还包括：设置所述空气孔的孔间距与工作波长的比值为1.1-2。
本文所述的光子晶体光纤及其制备方法，包括光纤本体，所述光纤本体的中心处设有纤芯，所述光纤本体内设有多个连续旋转的空气孔，所述空气孔呈螺旋状且多个空气孔的旋向相同，利用所述空气孔的旋转空间结构为左旋偏振光和右旋偏振光产生不同的传输条件，从而具有更好的圆双折射效应，能够提供更好的传感效果，且所述多个空气孔的排布为围绕所述纤芯的六边形对称阵列排布，有利于避免线性双折射。

Claims (9)

  1. 一种光子晶体光纤，包括光纤本体，所述光纤本体(10)的中心处设有纤芯(11)，所述光纤本体(10)内设有多个空气孔(42)，每个所述空气孔(42)呈螺旋状且所述多个空气孔(42)的旋向相同，所述光纤本体(10)沿所述光纤本体(10)的径向的任意一个横截面上，所述多个空气孔(42)的排布为围绕所述纤芯(11)的排布。
  2. 根据权利要求1所述的光子晶体光纤，所述多个空气孔(42)的大小相等。
  3. 根据权利要求1所述的光子晶体光纤，其中，所述光纤本体包括二氧化硅和铽。
  4. 一种光子晶体光纤的制备方法，用于制作权利要求1-3中任意一项所述的光子晶体光纤，所述方法包括：
    制作光纤预制棒；以及，
    将所述光纤预制棒拉丝；
    其中，所述将所述光纤预制棒拉丝，包括：
    对所述光纤预制棒加热；以及，
    将所述光纤预制棒旋转拉丝，并在将所述光纤预制棒旋转拉丝时，向光纤本体中的空气孔注入惰性气体，通过调整所述惰性气体的压强以及拉制的速度来保持所述空气孔的大小。
  5. 根据权利要求4所述的光子晶体光纤的制备方法，其中，所述对所述光纤预制棒加热为：对所述光纤预制棒的一端进行加热，使所述光纤预制棒的一端融化。
  6. 根据权利要求4所述的光子晶体光纤的制备方法，其中，所述将所述光纤预制棒旋转拉丝为：对加热后的光纤预制棒进行拉丝，同时沿光纤本体轴向匀速旋转所述光纤预制棒的棒体。
  7. 根据权利要求4所述的光子晶体光纤的制备方法，其中，所述制作光纤预制棒，包括：
    制备毛细管；
    将所述毛细管堆叠呈为设计尺寸的形状；
    使用等离子体化学气相沉积工艺制作包层。
  8. 根据权利要求4所述的光子晶体光纤的制备方法，所述方法还包括：设置所述空气孔的直径与所述空气孔间距的比值为0.25-0.9。
  9. 根据权利要求4所述的光子晶体光纤的制备方法，所述方法还包括：设置所述空气孔的孔间距与工作波长的比值为1.1-2。
PCT/CN2019/103381 2019-03-19 2019-08-29 光子晶体光纤及其制备方法 Ceased WO2020186696A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2019566661A JP7061628B2 (ja) 2019-03-19 2019-08-29 フォトニック結晶ファイバおよびその製造方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910208586.3A CN109912193A (zh) 2019-03-19 2019-03-19 光子晶体光纤及其制备方法
CN201910208586.3 2019-03-19

Publications (1)

Publication Number Publication Date
WO2020186696A1 true WO2020186696A1 (zh) 2020-09-24

Family

ID=66965602

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/103381 Ceased WO2020186696A1 (zh) 2019-03-19 2019-08-29 光子晶体光纤及其制备方法

Country Status (3)

Country Link
JP (1) JP7061628B2 (zh)
CN (1) CN109912193A (zh)
WO (1) WO2020186696A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109912193A (zh) * 2019-03-19 2019-06-21 中国电力科学研究院有限公司 光子晶体光纤及其制备方法
CN114740566B (zh) * 2022-03-11 2023-05-02 中国科学院西安光学精密机械研究所 用于太赫兹波高性能成像的聚合物微结构光纤及光纤传像束

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003222739A (ja) * 2002-01-29 2003-08-08 Mitsubishi Cable Ind Ltd 偏波保持フォトニッククリスタルファイバ
CN1605894A (zh) * 2004-11-18 2005-04-13 上海大学 磁光效应光子晶体光纤及其制造方法
CN101052907A (zh) * 2004-07-14 2007-10-10 密执安州立大学董事会 复合波导
CN109912193A (zh) * 2019-03-19 2019-06-21 中国电力科学研究院有限公司 光子晶体光纤及其制备方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2003201996A1 (en) * 2002-01-11 2003-07-24 Blaze Photonics Limited Birefringent optical fibres
JP3911220B2 (ja) * 2002-08-28 2007-05-09 正隆 中沢 フォトニッククリスタル光ファイバ及びその製造方法
JP2004102281A (ja) * 2003-09-04 2004-04-02 Mitsubishi Cable Ind Ltd フォトニッククリスタルファイバ及びその製造方法
JP3866725B2 (ja) * 2004-03-03 2007-01-10 正隆 中沢 プラスチックホーリーファイバの製造方法
JP2006126725A (ja) * 2004-11-01 2006-05-18 Sumitomo Electric Ind Ltd 光ファイバ
DK2103971T3 (da) * 2006-11-01 2013-02-04 Fujikura Ltd Fiber med fotonisk båndgab
FR2941539B1 (fr) * 2009-01-23 2011-02-25 Draka Comteq France Fibre optique monomode
CN103969737B (zh) * 2013-01-28 2017-04-12 无锡万润光子技术有限公司 非对称双折射涡旋光纤及其制备方法
CN106597601A (zh) * 2015-10-20 2017-04-26 武汉长盈通光电技术有限公司 一种微结构低双折射光纤及其制作方法
US10033148B2 (en) * 2016-02-04 2018-07-24 Lawrence Livermore National Security, Llc Waveguide design for line selection in fiber lasers and amplifiers

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003222739A (ja) * 2002-01-29 2003-08-08 Mitsubishi Cable Ind Ltd 偏波保持フォトニッククリスタルファイバ
CN101052907A (zh) * 2004-07-14 2007-10-10 密执安州立大学董事会 复合波导
CN1605894A (zh) * 2004-11-18 2005-04-13 上海大学 磁光效应光子晶体光纤及其制造方法
CN109912193A (zh) * 2019-03-19 2019-06-21 中国电力科学研究院有限公司 光子晶体光纤及其制备方法

Also Published As

Publication number Publication date
JP2021517975A (ja) 2021-07-29
CN109912193A (zh) 2019-06-21
JP7061628B2 (ja) 2022-04-28

Similar Documents

Publication Publication Date Title
US20040033043A1 (en) Dispersion tailoring in optical fibres
US20060191293A1 (en) Furnace and process for drawing radiation resistant optical fiber
WO2015107931A1 (ja) 光ファイバ母材の製造方法および光ファイバの製造方法
JP2002543025A5 (zh)
US20150285994A1 (en) Manufacturing method and manufacturing apparatus of optical fiber
CN100390593C (zh) 制造具有降低的偏振模式色散的光纤远程通信光缆的方法
CN106597601A (zh) 一种微结构低双折射光纤及其制作方法
AU2010215384B2 (en) Method for producing and processing a preform, preform and optical fiber
WO2020186696A1 (zh) 光子晶体光纤及其制备方法
KR101426158B1 (ko) 광섬유 모재의 제조 장치
US20050188728A1 (en) Apparatus and method for manufacturing optical fiber including rotating optical fiber preforms during draw
JP2007197273A (ja) 光ファイバ素線及びその製造方法
CN103529510B (zh) 一种高双折射低损耗光子晶体光纤
WO2026045364A1 (zh) 一种熊猫型保偏光纤及其制备方法
WO2012111436A1 (ja) 光ファイバの製造方法
CN109696723B (zh) 一种双折射光子晶体光纤及其制备方法
JP2005343703A (ja) 光ファイバ素線の製造方法、光ファイバ素線
US12358829B2 (en) Method for manufacturing a preform for a multi-core optical fiber and method for manufacturing multi-core optical fibers
CN113121104B (zh) 一种光纤预制棒及制备光纤预制棒和光纤的方法
CN1329754C (zh) “一”字型保偏光纤及其生产方法
JP4172440B2 (ja) 光ファイバの製造方法
JP5989949B2 (ja) 光ファイバの製造方法
JP4271125B2 (ja) 光ファイバ母材の延伸方法
JP4215943B2 (ja) 光ファイバ素線の製造方法
US20070157674A1 (en) Apparatus for fabricating optical fiber preform and method for fabricating low water peak fiber using the same

Legal Events

Date Code Title Description
ENP Entry into the national phase

Ref document number: 2019566661

Country of ref document: JP

Kind code of ref document: A

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19919835

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205 DATED 24/02/2022)

122 Ep: pct application non-entry in european phase

Ref document number: 19919835

Country of ref document: EP

Kind code of ref document: A1