WO2022068130A1 - Structure de ferrule mt et module de fibre optique - Google Patents

Structure de ferrule mt et module de fibre optique Download PDF

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Publication number
WO2022068130A1
WO2022068130A1 PCT/CN2021/074022 CN2021074022W WO2022068130A1 WO 2022068130 A1 WO2022068130 A1 WO 2022068130A1 CN 2021074022 W CN2021074022 W CN 2021074022W WO 2022068130 A1 WO2022068130 A1 WO 2022068130A1
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WO
WIPO (PCT)
Prior art keywords
optical fiber
channel
ferrule
fiber coating
ferrule body
Prior art date
Application number
PCT/CN2021/074022
Other languages
English (en)
Chinese (zh)
Inventor
金建峰
刘光兵
Original Assignee
上海光卓通信设备有限公司
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
Priority claimed from CN202022208947.5U external-priority patent/CN213338107U/zh
Priority claimed from CN202011064640.0A external-priority patent/CN112180517A/zh
Application filed by 上海光卓通信设备有限公司 filed Critical 上海光卓通信设备有限公司
Publication of WO2022068130A1 publication Critical patent/WO2022068130A1/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
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means

Definitions

  • the present application relates to the technical field of optical fiber connector components, in particular to an MT ferrule structure and an optical fiber module.
  • the MT ferrule is a connecting component for optical fiber connectors, usually used as the connector of the optical fiber connector.
  • There is a channel inside for fixing the optical fiber and the guide holes or guide posts on both sides are used as the docking reference.
  • the usual structure of the MT ferrule shown is that its inner front end is provided with an optical fiber guiding groove 51, and the optical fiber guiding groove 51 is used to fix the optical fiber cladding of the optical fiber,
  • the inner rear end is provided with a hollow space 50, the hollow space 50 is used for connecting with the optical fiber tail pipe, and a dispensing window 5 is opened at the top for dispensing and fixing the fixed optical fiber.
  • this conventional structure has the following defects: 1.
  • the existence of the glue dispensing window 5 makes the optical fiber, especially the thickness of the glue layer around the junction point of the optical fiber cladding and the optical fiber coating layer uneven, which has an adverse effect on reliability; 2 .
  • the existence of the dispensing window 5 causes the weak lateral strength of the ferrule, which makes the ferrule easily damaged during production and use; 3.
  • the length of the optical fiber guide groove 51 is not enough, and the optical fiber is difficult to enter the fiber, so it is necessary to use a microscope; 4.
  • a hollow space 50 for passing through the tail pipe is reserved at the rear end, so that the wall thickness between the hollow space 50 and the guide holes 52 on the left and right sides is not thick enough, the strength becomes weak, and the ferrule is easily partially ruptured.
  • the purpose of the present application is to design an MT ferrule structure with a smaller size and the performance of high density and high reliability while solving the above-mentioned defects in the prior art.
  • an MT ferrule structure including a ferrule body, the inner front section of the ferrule body is an optical fiber cladding channel for positioning and fixing the optical fiber cladding, and the left and right ends of the ferrule body are There are front and rear guide holes, wherein the inner rear section of the ferrule body is provided with an optical fiber coating layer channel for fixing the optical fiber coating layer, and there is a gap between the optical fiber coating channel and the optical fiber coating layer channel.
  • the guide channel transitions, the top and bottom of the ferrule body are closed, and the inner end of the ferrule body is provided with a glue dispensing port.
  • the optical fiber coating layer channel is a straight hole channel, the diameter of the straight hole channel is larger than that of the optical fiber cladding channel, the straight hole channel is composed of several straight holes, and the several straight holes are separated from each other. open.
  • optical fiber coating layer channel is a tapered hole channel, and the front end diameter of the tapered hole channel is smaller than the rear end diameter of the tapered hole channel.
  • the optical fiber coating layer channel extends to the glue dispensing port.
  • An MT ferrule structure comprising a ferrule body, the interior of the ferrule body is provided with at least one optical fiber cladding channel and at least one guide hole, the at least one optical fiber cladding channel and the front surface of the ferrule body are provided same, wherein, the inside of the ferrule body is further provided with a glue dispensing port and at least one optical fiber coating channel, the at least one optical fiber coating channel is used to fix the optical fiber coating, and the at least one optical fiber coating channel
  • the rear end of the channel and the front end of the at least one optical fiber coating channel correspond one-to-one and communicate with each other, and the rear end of each optical fiber coating channel is respectively communicated with the glue dispensing port, and the glue dispensing port is connected with the The rear surfaces of the ferrule body communicate with each other.
  • each optical fiber coating channel and the corresponding front end of the optical fiber coating channel are respectively communicated through the guiding channel.
  • the guide channel is in the shape of a truncated cone.
  • both the top surface and the bottom surface of the ferrule body are closed surfaces.
  • each of the optical fiber coating channels is a straight hole channel, and the diameter of the straight hole channel is larger than that of the optical fiber coating channel.
  • each of the optical fiber coating layer channels is a tapered hole channel, and the front end diameter of the tapered hole channel is smaller than the rear end diameter of the tapered hole channel.
  • the interior of the ferrule body is provided with a plurality of optical fiber cladding channels and a plurality of optical fiber coating channels, the plurality of optical fiber cladding channels are separated from each other, and the plurality of optical fiber coating channels are in phase with each other. Separated, each of the optical fiber coating channels and the corresponding optical fiber coating channels are coaxially arranged.
  • the outer periphery of the ferrule body is provided with a limiting step.
  • the tail end of the optical fiber coating channel is communicated with the glue dispensing port through a wedge-shaped surface.
  • An optical fiber module is configured with the above-mentioned MT ferrule structure.
  • the dispensing window is removed from the ferrule body, and the top and bottom are closed, making it stronger;
  • optical fiber cladding channel and optical fiber coating layer channel inside the ferrule body.
  • the optical fiber cladding channel fixes the optical fiber cladding layer
  • the optical fiber coating layer channel fixes the optical fiber coating layer, which can well protect the optical fiber, and the channel There is a guide channel transition between them, which enhances the protection of the optical fiber and improves the reliability of the product;
  • the wall thickness around the guide hole is allowed to be thicker, avoiding the possibility of rupture of the guide hole wall;
  • the overall size of the ferrule body can be made smaller, which increases the available space in the module when applied in the optical fiber module, and at the same time makes the size of the connector and the optical fiber module smaller.
  • Fig. 1 is the structure schematic diagram of existing conventional MT ferrule
  • FIG. 2 is a schematic perspective view of an MT ferrule structure according to an embodiment of the present application.
  • Fig. 3 is the transverse cross-sectional schematic diagram of the MT ferrule structure of Fig. 2;
  • Fig. 4 is a kind of longitudinal cross-sectional schematic diagram of the MT ferrule structure of Fig. 2;
  • Fig. 5 is another kind of longitudinal sectional schematic diagram of the MT ferrule structure of Fig. 2;
  • FIG. 6 is a schematic perspective view of an MT ferrule structure when an optical fiber is installed according to an embodiment of the present application
  • Fig. 7 is the longitudinal cross-sectional schematic diagram when the MT ferrule structure of Fig. 6 is installed with optical fiber;
  • Fig. 8 is the transverse cross-sectional schematic diagram of the MT ferrule structure of Fig. 6 when the optical fiber is not installed;
  • FIG. 9 is a schematic perspective view of an MT ferrule structure according to an embodiment of the present application.
  • Figure 10 is a schematic cross-sectional view of the MT ferrule structure of Figure 9;
  • Fig. 11 is the schematic diagram that the existing conventional MT ferrule structure is loaded into the optical fiber module
  • FIG. 12 is a schematic diagram of an MT ferrule structure installed in an optical fiber module according to an embodiment of the present application.
  • the MT ferrule structure includes a ferrule body 10, and the ferrule body 10 includes opposite front surfaces 101 and rear surfaces 102, opposite Left and right surfaces 103 and 104 , and opposing top (top) 105 and bottom (bottom) 106 surfaces.
  • a limiting step 10a may be formed on the ferrule body 10 to facilitate installation and positioning.
  • the inner front end of the ferrule body 10 is provided with a plurality of optical fiber coating channels 1 communicating with the front surface 101
  • the inner rear end of the ferrule body 10 is provided with a plurality of optical fiber coating layer channels 2 .
  • Each optical fiber cladding channel 1 is respectively used for fixing the optical fiber cladding of each optical fiber
  • each optical fiber coating layer channel 2 is respectively used for fixing the optical fiber coating layer of each optical fiber.
  • Each of the optical fiber cladding channels 1 and the corresponding optical fiber coating channels 2 are coaxial and can be transitioned by, for example, a guiding channel 12 , which is, for example, a truncated cone.
  • the plurality of fiber cladding channels 1 are separated from each other.
  • the inside of the ferrule body 10 is provided with guide holes 3 extending in the front and rear directions on the left and right sides of the optical fiber cladding channel 1, the guiding channel 12 and the optical fiber coating channel 2, respectively, and the guiding holes 3 are used for insertion.
  • a guide post (not shown in the figure) is provided. Both the top surface 105 and the bottom surface 106 of the ferrule body 10 are closed surfaces, and no glue dispensing window is provided.
  • the inner end of the ferrule body 10 is provided with a glue dispensing port 4, and the glue dispensing port 4 communicates with each of the optical fiber coating layer channels 2, and is used for dispensing soft glue around the optical fiber coating layer of the optical fiber to realize the optical fiber coating. protection of.
  • the tail end of the optical fiber coating channel 2 communicates with the glue dispensing port 4 through the wedge-shaped surface 201 .
  • FIG. 1 shows the structure of a conventional MT ferrule in the known technology. Compared with the conventional MT ferrule, the MT ferrule described in the embodiment of the present application has the following optimized structural differences:
  • the top of the conventional MT ferrule is provided with a dispensing window 5, and the application removes the dispensing window on the top surface 105, which can make the ferrule stronger and more reliable;
  • the conventional MT ferrule is only provided with a fiber guide groove 51 at the inner front end for fixing the fiber cladding, and the rear end is a whole hollow space 50. It is difficult to fix the fiber coating layer, so that the fiber cladding and the fiber The junction between the coating layers is easy to fail due to dislocation, and because there is only a fiber guide groove 51 for fixing the fiber cladding, and the length of the fiber guide groove 51 is also limited, it is difficult for the fiber to be inserted into the fiber.
  • the inner front end of the ferrule body 10 in the embodiment of the present application is provided with an optical fiber cladding channel 1, and the inner rear end is designed with an optical fiber coating layer channel 2.
  • the optical fiber coating layer channel 2 can additionally fix the optical fiber coating layer, which enhances the optical fiber coating layer. protection of.
  • the optical fiber coating layer channel 2 inside the MT ferrule body 10 may be a straight hole channel, and a plurality of independent straight hole channels are arranged side by side and spaced apart from each other, and serve as a positioning guide when the optical fiber is inserted into the fiber, so that The fiber feeding action is smoother.
  • the aperture of the optical fiber coating channel 2 is larger than that of the optical fiber coating channel 1 .
  • the optical fiber coating channel 2 can also be designed as a tapered hole channel, and the front end diameter of the tapered hole channel is smaller than the rear end diameter of the tapered hole channel.
  • FIGS. 6 to 8 the structure of the MT ferrule designed according to some embodiments of the present application is shown, and the structure of the MT ferrule when the optical fiber 6 is installed and applied to the MPO connector 7 .
  • the MPO connector 7 can be inserted into the glue dispensing port 4 .
  • soft glue is dispensed around the optical fiber coating layer of the optical fiber 6 through the glue dispensing port 4 to protect the optical fiber 6, and then the MPO connector 7 is plugged. into the dispensing port 4.
  • the structures of the MT ferrule designed according to some embodiments of the present application after miniaturization are shown. Similar to the previous embodiments, the miniaturized MT ferrule body is provided with an optical fiber coating layer Channel 2, the light coating layer channel 2 extends to the dispensing port 4.
  • the MT ferrule is designed with the above structure, the overall strength and reliability are significantly improved, and at the same time, in order to meet the requirements of high density, the overall size can be made smaller.
  • FIG. 11 is a structure in which a conventional MT ferrule of the known technology is applied in the optical fiber module 8 .
  • 12 is a structure in which the miniaturized MT ferrule designed according to some embodiments of the present application is applied in the optical fiber module 8.
  • the length of the external dimension of the conventional MT ferrule is usually 8 mm.
  • the MT ferrule can reduce the overall length to 4mm, which is an overall reduction of 4mm compared to the conventional MT ferrule.
  • the size-reduced micro MT ferrule is applied in the optical fiber module 8 , the available space in the optical fiber module 8 is increased, and the connector and the optical fiber module 8 can be made smaller in size at the same time.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Coupling Of Light Guides (AREA)

Abstract

L'invention concerne une structure de ferrule MT comprenant un corps de ferrule (10). Un segment avant de l'intérieur de celui-ci est un canal de gainage de fibre (1) utilisé pour positionner et fixer un gainage de fibre. Une extrémité gauche et une extrémité droite du corps de ferrule (10) sont pourvues de trous de guidage (3) s'étendant dans une direction avant-arrière. Un segment arrière de l'intérieur du corps de ferrule (10) est pourvu d'un canal de revêtement de fibres (2) utilisé pour fixer un revêtement de fibres. Un canal de guidage (12) est prévu sous la forme d'une transition entre le canal de gainage de fibre (1) et le canal de revêtement de fibre (2). La partie supérieure et la partie inférieure du corps de ferrule (10) sont toutes deux fermées. Une extrémité de l'intérieur du corps de ferrule (10) est pourvue d'un orifice de distribution de colle (4). Le corps de ferrule (10) de la structure de ferrule MT ne comprend pas de fenêtre de distribution de colle (5), et la partie supérieure et la partie inférieure du corps de ferrule (10) sont fermées, de telle sorte que le corps de ferrule (10) a une résistance élevée. Le canal de gainage de fibre (1) et le canal de revêtement de fibre (2) sont disposés à l'intérieur du corps de ferrule (10). Le canal de gainage de fibre (1) fixe le gainage de fibre, et le canal de revêtement de fibre (2) fixe le revêtement de fibre, de telle sorte que les fibres optiques sont bien protégées. De plus, le canal de guidage (12) est prévu sous la forme d'une transition entre les canaux, ce qui permet d'améliorer la protection des fibres optiques et d'améliorer la fiabilité du produit.
PCT/CN2021/074022 2020-09-30 2021-01-28 Structure de ferrule mt et module de fibre optique WO2022068130A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN202022208947.5U CN213338107U (zh) 2020-09-30 2020-09-30 一种mt插芯结构
CN202011064640.0 2020-09-30
CN202011064640.0A CN112180517A (zh) 2020-09-30 2020-09-30 一种mt插芯结构
CN202022208947.5 2020-09-30

Publications (1)

Publication Number Publication Date
WO2022068130A1 true WO2022068130A1 (fr) 2022-04-07

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PCT/CN2021/074022 WO2022068130A1 (fr) 2020-09-30 2021-01-28 Structure de ferrule mt et module de fibre optique

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002182067A (ja) * 2000-12-19 2002-06-26 Nippon Telegr & Teleph Corp <Ntt> 光ファイバコネクタ用フェルール
US20040161205A1 (en) * 2000-05-16 2004-08-19 Arie Hengelmolen Ferrule
CN206161912U (zh) * 2016-11-14 2017-05-10 东莞福可喜玛通讯科技有限公司 一种光纤连接器插芯
CN108431654A (zh) * 2016-03-16 2018-08-21 株式会社藤仓 带光纤的插芯以及带光纤的插芯的制造方法
CN112180517A (zh) * 2020-09-30 2021-01-05 上海光卓通信设备有限公司 一种mt插芯结构

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040161205A1 (en) * 2000-05-16 2004-08-19 Arie Hengelmolen Ferrule
JP2002182067A (ja) * 2000-12-19 2002-06-26 Nippon Telegr & Teleph Corp <Ntt> 光ファイバコネクタ用フェルール
CN108431654A (zh) * 2016-03-16 2018-08-21 株式会社藤仓 带光纤的插芯以及带光纤的插芯的制造方法
CN206161912U (zh) * 2016-11-14 2017-05-10 东莞福可喜玛通讯科技有限公司 一种光纤连接器插芯
CN112180517A (zh) * 2020-09-30 2021-01-05 上海光卓通信设备有限公司 一种mt插芯结构

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