WO2020019226A1 - Procédé et système de couplage de fibre optique, fibre optique et dispositif de transmission de signal - Google Patents

Procédé et système de couplage de fibre optique, fibre optique et dispositif de transmission de signal Download PDF

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Publication number
WO2020019226A1
WO2020019226A1 PCT/CN2018/097153 CN2018097153W WO2020019226A1 WO 2020019226 A1 WO2020019226 A1 WO 2020019226A1 CN 2018097153 W CN2018097153 W CN 2018097153W WO 2020019226 A1 WO2020019226 A1 WO 2020019226A1
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Prior art keywords
optical fiber
fiber
air
core
auxiliary
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PCT/CN2018/097153
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English (en)
Chinese (zh)
Inventor
何俊
张哲�
王义平
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深圳大学
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Priority to PCT/CN2018/097153 priority Critical patent/WO2020019226A1/fr
Publication of WO2020019226A1 publication Critical patent/WO2020019226A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/255—Splicing of light guides, e.g. by fusion or bonding
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means

Definitions

  • the present invention relates to the field of optical fiber technology, and in particular, to an optical fiber coupling method, system, optical fiber, and signal transmission device.
  • the unique photonic band-gap light-guiding mechanism of air-core photonic band-gap fibers allows light to travel in the air, avoiding the absorption and scattering problems of the core material itself. Therefore, there is no transmission window limitation in traditional glass optical fibers. It can transmit light and theoretically achieve very low loss, and is considered to be the best choice for the next generation of fiber optic communication technology.
  • the coupling loss is still as high as -2dB, and more importantly, the low-strength welding results in extremely poor mechanical strength at the welding point. Therefore, a more efficient, low-loss, and high-mechanical coupling method between an air-core photonic bandgap fiber and an ordinary single-mode fiber has not yet been realized.
  • the main purpose of the embodiments of the present invention is to provide an optical fiber coupling method, system, optical fiber, and signal transmission device, which can effectively reduce the coupling loss between an air-core photonic bandgap fiber and a single-mode fiber, and improve the connection position between the two. Mechanical strength.
  • a first aspect of an embodiment of the present invention provides a fiber coupling method.
  • the fiber coupling method includes:
  • auxiliary fiber and the collapsed air-core photon bandgap fiber form a solid-core index-guided optical fiber, and the air hole in the air-core photon bandgap fiber that is not plugged into the auxiliary fiber is not collapsed;
  • the index-guided optical fiber is connected to the single-mode optical fiber.
  • a second aspect of the embodiments of the present invention provides an optical fiber coupling system, where the optical fiber coupling system includes:
  • the first optical fiber connecting device is used to plug an auxiliary optical fiber into an air core of an air-core photonic band-gap optical fiber, wherein a refractive index of a core material in the auxiliary optical fiber is higher than a cladding of the air-core photon band-gap optical fiber Refractive index of the material
  • a second optical fiber connection device configured to perform preset processing on a part of the air-core photon bandgap fiber that is plugged into the auxiliary fiber, so that a part of the air-core photon bandgap fiber that is plugged into the auxiliary fiber.
  • the air hole is collapsed, wherein the auxiliary fiber and the collapsed air-core photon band-gap fiber form a solid-core index-guided fiber, and the air-core photon band-gap fiber is not filled with the auxiliary fiber.
  • Air holes have not collapsed;
  • An optical fiber cutting device configured to cut the index-guided optical fiber so that a cutting surface of the index-guided optical fiber is matched with an end surface of a single-mode optical fiber to be connected;
  • a third optical fiber connection device is configured to connect the refractive index guided optical fiber and the single-mode optical fiber.
  • a third aspect of the embodiments of the present invention provides an optical fiber, the optical fiber includes: an auxiliary optical fiber, an air core photonic band gap optical fiber, and a single-mode optical fiber;
  • the refractive index of the core material in the auxiliary optical fiber is greater than the refractive index of the cladding material of the air-core photonic band gap optical fiber; the auxiliary optical fiber is located in the air core of the air-core photonic band gap optical fiber, and the auxiliary optical fiber
  • the optical fiber is enveloped by a structure formed after the air hole of the air-core photonic band gap fiber is collapsed to form a solid core index-guided optical fiber, and the auxiliary fiber is not inserted in the air-core photonic band gap fiber. Without collapsing, the index-guided optical fiber is connected to the single-mode fiber, wherein the core of the index-guided optical fiber is connected to the core of the single-mode fiber.
  • a fourth aspect of the embodiments of the present invention provides a signal transmission device, where the signal transmission device includes the foregoing optical fiber.
  • Embodiments of the present invention provide an optical fiber coupling method, a system, an optical fiber, and a signal transmission device.
  • an air core photonic band gap optical fiber is plugged into an air core photon band gap optical fiber by plugging an auxiliary optical fiber into the air core of the air core photon band gap optical fiber.
  • the auxiliary fiber is pre-set at the place where the air hole in the air-core photonic band gap fiber is inserted into the auxiliary fiber, and the refractive index guided fiber formed by cutting the air hole is cut to cut the refractive index guided fiber.
  • the surface is adapted to the end face of the single-mode optical fiber to be connected, and the refractive index-guided optical fiber is connected to the single-mode optical fiber, and a new coupling optical fiber structure can be obtained.
  • Coupling of the mode fiber will cause problems such as the increase of light energy loss and weak mechanical strength of the coupling part because of the collapse of the cladding symmetrical crystal structure caused by the collapse of the air hole.
  • the air-core photon band gap fiber and the auxiliary fiber form a solid core index-guided fiber. This structure greatly increases the mechanical strength of the coupling portion and reduces the air-core photon band. Coupling loss between a gap fiber and a single-mode fiber.
  • FIG. 1 is a schematic flowchart of an optical fiber coupling method according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of inserting an auxiliary optical fiber into an air-core photonic band-gap optical fiber according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of an air discharge of an air core photon band gap fiber with an auxiliary fiber inserted in an embodiment of the present invention to collapse an air hole of the air core photon band gap fiber;
  • FIG. 4 is a schematic diagram of cutting a refractive index guided optical fiber according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of connecting a refractive index guided optical fiber and a single-mode optical fiber according to an embodiment of the present invention
  • FIG. 6 is a schematic structural diagram of an optical fiber obtained by using the optical fiber coupling method in FIG. 1 according to an embodiment of the present invention
  • FIG. 7 is a schematic diagram of inserting another auxiliary optical fiber into an air-core photonic bandgap optical fiber according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of an optical fiber coupling system according to an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of an optical fiber according to an embodiment of the present invention.
  • the existing coupling technology is used to couple the air-core photon band gap fiber and the ordinary single-mode fiber.
  • the coupling part the cladding symmetrical crystal structure of the air-core photon band gap fiber is largely damaged, so the coupling part
  • the optical energy loss is large, the transmission loss is large, and the structure of the coupling part is relatively thin, so the mechanical strength is low, which increases the difficulty of transmission and laying.
  • this embodiment proposes a fiber coupling method.
  • the optical fiber coupling method in this embodiment includes:
  • Step 101 Plug an auxiliary optical fiber into an air core of an air-core photonic band-gap optical fiber, wherein a refractive index of a core material in the auxiliary optical fiber is higher than a refractive index of a cladding material of the air-core photon band-gap optical fiber;
  • the air-core photon band-gap fiber can be air-core photon band-gap fiber of various types, specifications, and transmission bands.
  • the refractive index of the core in the auxiliary fiber needs to meet certain requirements.
  • the refractive index of the core material of the auxiliary fiber is slightly higher than that of the cladding material of the air-core photonic band-gap fiber
  • the refractive index-guided optical fiber formed by the auxiliary fiber and the air-core photon band-gap fiber is single-mode Optical fiber for transmission.
  • the auxiliary optical fiber is made according to a common single-mode optical fiber for communication.
  • the auxiliary optical fiber can be made based on a common single-mode optical fiber whose refractive index of the core material is at least 0.01 higher than that of the cladding material of the air-core photonic bandgap fiber.
  • the type of the auxiliary fiber includes, but is not limited to, a micro-nano fiber.
  • the refractive index of the core material of the auxiliary fiber may be much larger than the refractive index of the cladding material of the air-core photonic bandgap fiber.
  • the auxiliary fiber is a single-mode fiber core for communication.
  • the auxiliary fiber is composed of a step-index structure formed by a core and a partial cladding of the single-mode fiber. It can be understood that, in order to plug the auxiliary fiber into the air core of the air-core photonic band-gap fiber, the diameter of the auxiliary fiber must be slightly smaller than the diameter of the air core of the air-core photon band-gap fiber, that is, the auxiliary fiber of this embodiment. Gap fit with air core of air-core photonic band gap fiber. However, it can be understood that, in order to avoid insufficient mechanical strength at the coupling part, it is necessary to avoid that the gap between the auxiliary fiber and the air core of the air-core photonic band-gap fiber is too large.
  • the step of plugging the auxiliary optical fiber into the air core of the air-core photonic band-gap optical fiber can be completed by an optical fiber fusion splicer.
  • the air-core photon band gap optical fiber and the auxiliary optical fiber with the cut end face are respectively placed in the left and right clamps of the optical fiber fusion splicer.
  • the motor of the optical fiber fusion splicer is adjusted to precisely control the air.
  • the air core of the core photonic band gap fiber is aligned with the position of the auxiliary fiber, so that the auxiliary fiber is inserted into the air core of the air core photon band gap fiber.
  • this step can also be completed manually by the user.
  • the user fixes the auxiliary fiber and the air-core photon band-gap fiber on a precision displacement platform. Under the observation of a microscope, the auxiliary fiber is inserted into the air-core photon band-gap.
  • Step 102 Preset processing is performed on the part where the auxiliary fiber is inserted into the air-core photonic band-gap fiber, so that the air hole in the part where the auxiliary fiber is inserted into the air-core photon band-gap fiber is collapsed, wherein the auxiliary fiber and the collapsed air core
  • the photon band-gap fiber forms a solid-core index-guided fiber, and the air hole in the air-core photon band-gap fiber is not collapsed in the auxiliary fiber;
  • the purpose of the preset processing is to collapse the air holes in the air-core photonic bandgap fiber into the auxiliary fiber to form a solid core index-guided optical fiber. Therefore, the preset processing is to allow accurate positioning.
  • a processing method for heating The specific heating parameters depend on the melting parameters of the cladding material that isolates each air column in the air-core photonic band gap fiber.
  • the collapse of the air holes of the air-core photonic band gap fiber is completed by an arc discharge process.
  • the above-mentioned preset processing of the part where the auxiliary fiber is inserted into the air-core photonic band gap fiber, and the collapse of the air hole in the part where the auxiliary fiber is inserted into the air-core photon band gap fiber includes the following: The part where the auxiliary fiber is plugged in the gap fiber is subjected to arc discharge treatment, so that the air hole in the part where the auxiliary fiber is plugged in the air-core photonic band gap fiber is collapsed.
  • the discharge parameters during arc discharge are related to the material, thickness, and number of air columns of the air-core photonic bandgap fiber.
  • Discharge parameters include, but are not limited to, discharge intensity, discharge duration, and the like.
  • discharge parameters of each discharge can be adjusted according to actual needs.
  • the discharge power can be selected on the optical fiber fusion splicer: "standard-50bit", the discharge time: "400ms", according to the setting
  • the discharge parameters are used to discharge a collapsed position on the air-core photon bandgap fiber.
  • the number of discharges to the same collapsed position is generally 3-5.
  • the actual number of repeated discharges depends on the actual collapse condition.
  • the length of the auxiliary fiber inserted into the air-core photon bandgap fiber is sufficiently long, for example, not less than 4cm, etc. . Further, a portion of the auxiliary optical fiber inserted into the air-core photon band-gap fiber is longer than a portion of the air-core photon band-gap fiber that is collapsed.
  • FIG. 2 is a schematic diagram of inserting an auxiliary optical fiber into an air-core photonic band-gap fiber
  • FIG. 3 is a schematic diagram of an air discharge of the air-core photon band-gap fiber to collapse an air hole of the air-core photon band-gap fiber.
  • 21 is an air-core photonic band gap fiber
  • 22 is an auxiliary fiber.
  • one end of the auxiliary optical fiber penetrates into the air-core photonic bandgap fiber is A end and the other end is B end.
  • the structure of the auxiliary optical fiber in Fig. 2 is a step refractive index structure composed of a core and a partial cladding.
  • the light gray part of the outer layer of the auxiliary fiber 22 is the cladding, and the darker part of the inner layer is the single-mode fiber core.
  • the air core photon bandgap fiber When the air core photon bandgap fiber is collapsed in this embodiment, it can start from the vicinity of the A end, and then sequentially collapse the air holes of the air core photon bandgap fiber in the direction from the A end to the B end. Each time a position is collapsed, two The matched optical fibers (21 and 22) are moved to the left by the length of the currently collapsed position, and then continue to discharge to collapse the next uncollapsed position; this embodiment can also start near the B end, and then follow the direction from the B end to the A The direction of the end collapses the air holes of the air-core photonic band-gap fiber in order, and this embodiment has no limitation on this.
  • the auxiliary fiber having a certain length (for example, not less than a preset length) from the A end is not collapsed corresponding to the air core photonic band gap fiber.
  • the collapsed structure of the air hole of the air-core photonic band-gap fiber tightly wraps the auxiliary fiber to form a solid-core index-guided fiber as shown at 31 in FIG. 3.
  • Step 103 Cut the index-guided optical fiber so that the cutting surface of the index-guided optical fiber is matched with the end face of the single-mode fiber to be connected;
  • the index-guided optical fiber In order to facilitate the connection between the index-guided optical fiber and the single-mode fiber, the index-guided optical fiber needs to be cut.
  • a fiber cutter can be used for cutting, or a femtosecond laser can be used for cutting.
  • the parameters of the fiber cutter can be adjusted according to actual needs.
  • the subsequent steps can be continued.
  • the length of the index-guided optical fiber must meet certain requirements, for example, the length of the index-guided optical fiber is not less than Preset length threshold.
  • the cutting surface of the index-guided optical fiber after cutting is perpendicular to its axis.
  • Step 104 Connect the index-guided optical fiber and the single-mode optical fiber.
  • the index-guided optical fiber and the single-mode optical fiber can be connected by fusion splicing.
  • the connection of the index-guided optical fiber and the single-mode optical fiber includes: the index-guided optical fiber is fused by fusion. Connect with single-mode fiber.
  • the index-guided optical fiber 31 is aligned with the core of the single-mode fiber 51 to be connected (the end face of the single-mode fiber is also perpendicular to its own axis), so that the axes of the two are at On a straight line, and then weld.
  • the fusion parameters of the ordinary single-mode fiber can be used to fuse the index-guided optical fiber and the single-mode fiber to obtain a coupled optical fiber as shown in FIG. 6.
  • the auxiliary fiber is a single-mode fiber core for communication (the single-mode fiber here is different from the single-mode fiber connected to the index-guided fiber in step 104), and the auxiliary fiber is inserted into the air-core photon.
  • the air core of the band gap fiber also includes:
  • the fiber cladding of the optical fiber to be used is etched by a predetermined chemical etching method to obtain an optical fiber core as an auxiliary optical fiber.
  • the optical fiber to be used is a common single-mode optical fiber for communication.
  • the preset chemical etching method in this embodiment includes, but is not limited to, using a hydrofluoric acid to etch the optical fiber cladding.
  • the cladding material of the optical fiber to be used can be completely etched by controlling the corrosion parameters (including, but not limited to, the concentration of the acid, the duration of the etch, etc.) while keeping the optical fiber core from being etched.
  • the auxiliary fiber is composed of a core of a single-mode fiber and a step refractive index structure formed by a part of the cladding.
  • the auxiliary fiber is inserted into the air core of the air-core photonic band gap fiber before :
  • the optical fiber to be used is etched by a predetermined chemical etching method to obtain an auxiliary optical fiber having a step refractive index structure formed by a core and a partial cladding of a single-mode optical fiber.
  • the optical fiber to be used is a common single-mode optical fiber for communication.
  • the preset chemical etching method in this embodiment includes, but is not limited to, using a hydrofluoric acid to etch a part of the optical fiber cladding.
  • the auxiliary optical fiber can be obtained by controlling the corrosion parameters (including but not limited to the type of acid, the concentration, the duration of the etching, etc.) to incompletely etch the cladding of the optical fiber to be used.
  • a layer structure other than the optical fiber cladding on the optical fiber to be used such as a coating layer, may be stripped by a fiber clamp to perform subsequent etching operations.
  • an auxiliary optical fiber when an auxiliary optical fiber is directly prepared from a single-mode optical fiber with a complete structure, an uncorroded optical fiber with a complete optical fiber structure (such as 71 in FIG. 7) can be retained at one end of the auxiliary optical fiber, which can facilitate optical fiber splicing.
  • the machine clamps the auxiliary fiber and inserts it into the air core of the air-core photonic band gap fiber.
  • the auxiliary fiber needs to be subjected to steps such as acid neutralization.
  • the optical fiber coupling system includes:
  • the first optical fiber connection device 81 is configured to plug an auxiliary optical fiber into an air core of an air-core photonic band-gap optical fiber, wherein the refractive index of the core material in the auxiliary optical fiber is higher than that of the cladding material of the air-core photon band-gap optical fiber. Refractive index
  • the second optical fiber connection device 82 is configured to perform preset processing on the part where the auxiliary fiber is inserted into the air-core photonic band-gap fiber, so as to collapse the air hole in the part where the auxiliary fiber is inserted into the air-core photon band-gap fiber.
  • the optical fiber and the collapsed air-core photon band-gap fiber form a solid core index-guided optical fiber, and the air hole in the air-core photon band-gap fiber is not collapsed in the auxiliary fiber;
  • An optical fiber cutting device 83 configured to cut an index-guided optical fiber so that a cutting surface of the index-guided optical fiber is adapted to an end surface of a single-mode optical fiber to be connected;
  • the third optical fiber connecting device 84 is configured to connect the refractive index guided optical fiber and the single-mode optical fiber.
  • the first optical fiber connection device, the second optical fiber connection device, and the third optical fiber connection device are all optical fiber fusion splicers.
  • the optical fiber fusion splicer is specifically used to perform arc discharge on the air core photonic band gap optical fiber in which the auxiliary optical fiber is inserted. Treatment, to collapse the air hole in the air core photon band gap fiber into the auxiliary fiber, and to connect the index-guided fiber and the single-mode fiber by fusion welding.
  • the auxiliary optical fiber is a fiber core of a single-mode optical fiber, or the auxiliary optical fiber is composed of a step-index structure formed by a core and a partial cladding of the single-mode optical fiber.
  • the optical fiber coupling system of this embodiment further includes: a preparation device for etching the optical fiber cladding of the optical fiber to be used by a predetermined chemical etching method to obtain the optical fiber core of the single-mode optical fiber as an auxiliary optical fiber; or The chemical etching method is used to etch the optical fiber to be used to obtain an auxiliary optical fiber composed of a step-index structure formed by a core and a partial cladding of a single-mode optical fiber.
  • the layer structure other than the upper cladding of the optical fiber to be used such as a coating layer, can be peeled off with an optical fiber clamp.
  • the type of the auxiliary optical fiber in this example includes a micro-nano fiber.
  • the part of the auxiliary fiber inserted into the air-core photonic band-gap fiber is longer than the collapsed part of the air-core photon band-gap fiber.
  • this embodiment further provides an optical fiber, which can be obtained through the optical fiber coupling method in the foregoing example.
  • the optical fiber includes: an auxiliary fiber 91, an air-core photon band-gap fiber 92, and a single-mode fiber 93; the structure on the left of the dotted line in FIG. 9 can be considered to be formed by the auxiliary fiber 91 and the air-core photon band-gap fiber 92.
  • the structure including the refractive index guided optical fiber 921 and the structure on the right side of the dotted line can be regarded as the single-mode optical fiber 93.
  • the refractive index of the core material in the auxiliary optical fiber 91 is greater than the refractive index of the cladding material of the air-core photonic band-gap optical fiber 92; the auxiliary optical fiber 91 is located in the air core of the air-core photonic band-gap optical fiber 92, and the auxiliary optical fiber 91 is exposed to air-core photons
  • the auxiliary fiber 91 is an optical fiber core of a single-mode fiber, or the auxiliary fiber is composed of a step-index structure formed by a core and a partial cladding of the single-mode fiber.
  • the preparation method of the auxiliary optical fiber reference may be made to the description of other examples, and this example is not repeated here.
  • the auxiliary fiber in this example is a common single-mode fiber for communication, and its type includes, but is not limited to, micro-nano fiber.
  • a solid-core index-guided fiber formed by an auxiliary fiber and an air-core photonic band-gap fiber is a single-mode fiber.
  • the index-guided optical fiber 921 and the single-mode optical fiber 93 are connected, the two end surfaces in contact with each other are matched (the area sizes are not necessarily equal).
  • the core of the index-guided fiber can be connected to the single-mode fiber by fusion splicing.
  • the splicing parameters are the splicing parameters of ordinary single-mode optical fibers.
  • the portion of the auxiliary fiber 91 that is plugged into the air-core photonic band-gap fiber 92 is longer than the collapsed portion of the air-core photon band-gap fiber.
  • this embodiment further provides a signal transmission device, which includes the optical fiber in the above example (such as the optical fiber in FIG. 9).
  • the auxiliary fiber can be preset into the air core photon band gap fiber by inserting the auxiliary fiber into the air core of the air core photon band gap fiber, so that the air core photon Collapse of the air hole in the band gap fiber where the auxiliary fiber is inserted, and cutting the index-guided fiber so that the cutting surface of the index-guided fiber matches the end face of the single-mode fiber to be connected, and the index-guided fiber
  • a new coupling fiber structure can be obtained.
  • the cladding symmetry crystal structure will be damaged due to the collapse of air holes.
  • the air core photonic band gap fiber and the auxiliary fiber form a solid core refractive index guided fiber, which reduces the coupling loss caused by the collapse of the air hole in the prior art, thereby realizing air
  • the high-efficiency, high-mechanical coupling of the core photon bandgap fiber and ordinary single-mode fiber reduces the transmission loss of optical signals.
  • the disclosed devices, systems, and methods may be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of modules is only a logical function division.
  • multiple modules or components may be combined or integrated.
  • To another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or modules, which may be electrical, mechanical or other forms.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)

Abstract

La présente invention concerne un procédé et un système de couplage de fibre optique, une fibre optique et un dispositif de transmission de signal, ledit procédé consistant : à insérer une fibre optique auxiliaire (22, 91) dans un noyau de fibre à air d'une fibre optique à bande interdite photonique à noyau à air (21, 92) ; à effectuer un traitement prédéfini sur une partie, où la fibre optique auxiliaire (22, 91) est insérée, de la fibre optique à bande interdite photonique à noyau à air (21, 92), de manière à détruire un trou d'air dans la partie, où la fibre optique auxiliaire (22, 91) est insérée, de la fibre optique à bande interdite photonique à noyau à air (21, 92) ; à découper une fibre optique de type à guidage d'indice de réfraction (31, 921) formée par la destruction du trou d'air ; et à connecter la fibre optique de type à guidage d'indice de réfraction (31, 921) à une fibre optique monomode (51, 93), et ainsi, une nouvelle structure de fibre couplée peut être obtenue. Au niveau de la partie de couplage, la fibre optique à bande interdite photonique à noyau à air (21, 92) et la fibre optique auxiliaire (22, 91) forment la fibre optique de guidage d'indice de réfraction (31, 921) comportant un noyau solide, ce qui augmente fortement la résistance mécanique de la partie de couplage, réduit la perte de couplage entre la fibre optique à bande interdite photonique à noyau à air (21, 92) et la fibre optique monomode (51, 93).
PCT/CN2018/097153 2018-07-26 2018-07-26 Procédé et système de couplage de fibre optique, fibre optique et dispositif de transmission de signal WO2020019226A1 (fr)

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US20080037939A1 (en) * 2006-07-31 2008-02-14 The Hong Kong Polytechnic University Splicing small core photonic crystal fibers and conventional single mode fiber
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CN104166183A (zh) * 2014-08-25 2014-11-26 中国电子科技集团公司第十一研究所 一种双包层光纤和光子晶体光纤的连接方法
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