CN213934302U - Optical fiber adapter - Google Patents

Abstract

The utility model provides an optical fiber adapter, which comprises a shell and an inserting core, wherein the two ends of the shell are communicated, the head end is used for being spliced and connected with external equipment, the inserting core is arranged in the shell in a penetrating way, the utility model adds an optical fiber and an end face coupling joint on the original equipment, the head end of the optical fiber is arranged in the inserting core in a penetrating way, the head end of the optical fiber is flush with the front end face of the inserting core and is used for being coupled and connected with the optical fiber on the external equipment, the tail end of the optical fiber backwards penetrates out of the shell, the tail end of the optical fiber is arranged in the end face coupling joint in a penetrating way, the tail end of the optical fiber is butted with the end face of the end face coupling joint at one end connected with a planar optical waveguide device, the end face coupling joint is directly coupled with the waveguide in the planar optical waveguide device, the optical fiber is aligned and fixed with the waveguide, a lens is not required to be added outside the optical fiber adapter for focusing, the structure can solve the problem of coupling the optical fiber adapter with the planar optical waveguide device under the premise of not changing the external dimension of the existing optical fiber adapter, so as to meet the requirement of the miniaturized package of the optical module.

Description

Optical fiber adapter

Technical Field

The utility model belongs to the technical field of the fiber communication technique and specifically relates to an optical fiber adapter is related to.

Background

In the optical fiber transmission equipment, planar optical waveguides such as a PLC, an SOA, a modulator and the like are applied more and more, and in the application process, integration and miniaturization packaging, such as an SFP module, a QSFP module and the like, are required; the conventional PLC-type coupling fa (fiber array) can only carry optical fibers, cannot be used in an optical fiber pluggable packaging form of SFP, QSFP and other modules, has a large structural size, cannot realize miniaturized packaging, and is difficult to meet the use requirement of optical fiber transmission equipment on miniaturization.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an optical fiber adapter to solve need increase lens among the prior art and just can accomplish the problem of optical fiber transmission equipment and planar optical waveguide component coupling between planar optical waveguide component and optical fiber transmission equipment.

The utility model provides a plurality of technical effects that preferred technical scheme among a great deal of technical scheme can produce see the explanation below in detail.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a pair of optical fiber adapter, including casing and lock pin, the casing both ends are link up and the head end is used for pegging graft with external equipment, the lock pin is worn to establish inside the casing, its characterized in that, wear to be equipped with optic fibre in the lock pin, the optic fibre head end is worn to establish in the lock pin and with the preceding terminal surface parallel and level of lock pin, the tail end of optic fibre is worn out the casing just is connected with the terminal surface coupling joint that is used for being connected with planar optical waveguide device, the tail end of optic fibre with the link terminal surface parallel and level of terminal surface coupling joint.

Preferably, the end face of the end face coupling joint connected with the planar optical waveguide device is an inclined face, and the inclined face is parallel to the end face of the connected end of the planar optical waveguide device.

Preferably, the inclination angle of the inclined plane is α, wherein α is greater than or equal to 0 and less than or equal to 11.

Preferably, said α is a real number.

Preferably, the end-face coupling joint is a glass capillary or a quartz silicon substrate.

Preferably, the material of the ferrule is ceramic.

Preferably, the housing comprises an adapter connector and a ferrule connecting seat, and the ferrule connecting seat is inserted at the tail end of the adapter connector.

Preferably, an insulator is arranged between the ferrule connecting seat and the adapter connecting head.

Preferably, an open ceramic sleeve is arranged between the outer side of the ferrule and the adapter connector.

Preferably, the optical fiber is a single mode optical fiber or a multimode optical fiber.

The utility model provides a pair of optical fiber adapter, its beneficial effect is:

the utility model provides a pair of optical fiber adapter, casing and lock pin in current optical fiber adapter, the casing both ends are link up, the head end is used for with external equipment plug-in connection, the lock pin is worn to establish inside the casing, the utility model discloses optic fibre and end face coupling joint have been increased on former equipment, the head end of optic fibre is worn to establish inside the lock pin, the head end of optic fibre and the preceding terminal surface parallel and level of lock pin, be used for carrying out the coupling with the optic fibre on the external equipment and be connected, the casing is worn out backward to the tail end of optic fibre, the tail end of optic fibre is worn to establish in the end face coupling joint, the tail end of optic fibre and the terminal surface coupling joint be used for the terminal surface parallel and level of the one end of being connected with planar lightwave circuit device, the waveguide direct coupling in end coupling joint and the planar lightwave circuit device, optic fibre aligns and waveguide and fixes, no longer need increase lens outside optical fiber adapter and focus, this structure can solve optical fiber adapter and planar lightwave circuit device before not changing the overall dimension of current optical fiber adapter, the structure And meeting the requirement of realizing the miniaturization package of the optical module.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a first fiber optic adapter configuration diagram illustrating an embodiment of the present invention;

FIG. 2 is a front cross-sectional view of a first fiber optic adapter according to an embodiment of the present invention;

FIG. 3 is a front cross-sectional view of a second fiber optic adapter according to an embodiment of the present invention;

FIG. 4 is a diagram illustrating a second connection structure between an optical fiber adapter and a planar lightwave circuit device according to an embodiment of the present invention;

fig. 5 is a front view of a second fiber adapter connected to a planar lightwave circuit according to an embodiment of the present invention.

In the figure: 1. a housing; 2. inserting a core; 3. an optical fiber; 4. an end face coupling joint; 5. a planar optical waveguide device; 6. an adapter connector; 7. a plug core connecting seat; 8. an insulating pad; 9. insulating glue; 10. a protective layer; 11. a fixed cylinder; 12. an open ceramic sleeve.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Hereinafter, embodiments will be described with reference to the drawings. The embodiments described below do not limit the scope of the invention described in the claims. Further, the entire contents of the configurations shown in the following embodiments are not limited to those necessary as a solution of the invention described in the claims.

Referring to fig. 1-5, the utility model discloses an optical fiber adapter, including casing 1, lock pin 2, optic fibre 3 and end-face coupling joint 4, both ends link up around casing 1, lock pin 2 wears to establish the inside of casing 1, 3 head ends of optic fibre wear to establish inside lock pin 2, the head end of optic fibre 3 and the preceding terminal surface parallel and level of lock pin 2, be used for being connected with external fiber equipment's optical fiber coupling, lock pin 2 and casing 1 are worn out to optic fibre 3's tail end, and optic fibre 3's tail end is worn to establish inside end-face coupling joint 4, end-face coupling joint 4 keeps away from the terminal surface of casing 1 one side and is used for being connected with planar optical waveguide device 5 cooperation, the tail end of optic fibre 3 and end-face coupling joint 4 are connected one side parallel and level with planar optical waveguide device 5, be used for with planar optical waveguide device 5's waveguide coupling butt joint.

Foretell casing 1 includes adapter connector 6 and lock pin connecting seat 7, and adapter connector 6 is used for being connected with external fiber equipment grafting, and lock pin connecting seat 7 is pegged graft at the tail end of adapter connector 6, and the connected mode divide into two kinds:

the first type is that the head end of the ferrule connecting seat 7 is sleeved on the outer side of the tail end of the adapter connector 6, the outer side surface of the ferrule connecting seat 7 is flush with the outer side surface of the adapter connector 6, an insulating pad 8 is arranged on the inner side of the joint of the ferrule connecting seat 7 and the adapter connector 6 and the outer side of the adapter connector 6, the front end surface of the joint of the ferrule connecting seat 7 and the adapter connector 6 is connected with the tail end surface of the adapter connector 6 through an insulating adhesive 9, and the insulating pad 8 and the insulating adhesive 9 are insulators;

the second is that the tail end of the adapter connector 6 is sleeved outside the ferrule connector 7, and the tail end face of the ferrule connector 7 is flush with the tail end face of the adapter connector 6, and the two can be in interference fit.

An open ceramic sleeve 12 is arranged between the outer side of the part of the ferrule 2 positioned at the adapter connector 6 and the inner side surface of the adapter connector 6, and the ferrule 2 is also made of ceramic.

In order to make the end-face coupling joint 4 and the planar optical waveguide device 5 be connected in a matching manner, the end face of the end face coupling joint 4 connected with the planar optical waveguide device 5 is parallel to the end face of the connection end of the planar optical waveguide device 5 (such as PLC, etc.), and may be an inclined plane, the inclination angle of the inclined plane may be α, and α is a real number greater than or equal to 0 and less than or equal to 11.

The optical fiber 3 may be a single-mode optical fiber 3 or a multimode optical fiber 3, a protective layer 10 is disposed on a portion of the optical fiber 3 penetrating out of the housing 1, and the head end of the end-face coupling joint 4 may be fixed to the protective layer 10 by using an insulating adhesive 9.

The end face coupling joint 4 may be a glass capillary or a quartz silicon substrate.

Referring to fig. 2, when the ferrule connecting seat 7 and the adapter connector 6 are connected in such a manner that the ferrule connecting seat 7 is sleeved on the tail end of the adapter connector 6, a fixing cylinder 11 is further disposed outside the open ceramic sleeve 12 and inside the adapter connector 6 for fixing the open ceramic sleeve 12 inside, the adapter connector 6 is internally of a cylindrical hollow structure, the head end of the adapter connector 6 is open, the tail end of the internal hollow structure is provided with a first blocking step, and the middle part is provided with a second blocking step, when installing, the protective layer 10 at the head end of the optical fiber 3 is removed, the fiber core of the optical fiber 3 is inserted into the ferrule 2, the fiber core beyond the head end of the ferrule 2 is removed, so that the end of the fiber core is flush with the front end face of the ferrule 2, then the ferrule connecting seat 7 is installed on the tail end of the ferrule 2, and the insulating pad 8 is sleeved on the head end of the ferrule connecting seat 7, then the inserting core 2 and the inserting core connecting seat 7 are inserted into the adapter connecting seat 6 from the tail end of the adapter connecting seat 6, the bonding surface of the inserting core connecting seat 7 and the adapter connecting seat 6 is bonded and fixed by using insulating glue 9, then the opening ceramic sleeve 12 is penetrated into the adapter connecting seat 6, the tail end of the opening ceramic sleeve 12 is propped against the first blocking step, then the fixed cylinder 11 is penetrated into the adapter connecting seat 6, the outer side surface of the fixed cylinder 11 is contacted with the inner side surface of the adapter connecting seat 6, a gap is left between the inner side surface of the fixed cylinder 11 and the outer side surface of the opening ceramic sleeve 12, so that when the opening ceramic sleeve 12 is connected with the inserting core 2, the opening ceramic sleeve 12 can generate elastic deformation, the opening ceramic sleeve 12 can tightly hold the inserting core 2, the fixed cylinder 11 can be connected with the adapter connecting seat 6 in an interference fit manner, and the inner side of the fixed cylinder 11 is provided with a third blocking step, the preceding terminal surface of installation back opening ceramic sleeve 12 supports and stops step department at the third, the tail end of a fixed section of thick bamboo 11 blocks to leave the fit-up gap with the second between the step, can guarantee the head end terminal surface of a fixed section of thick bamboo 11 and the preceding terminal surface parallel and level of adapter connector 6 after making the installation, then get rid of the protective layer 10 of 3 tail ends of optic fibre, expose the fibre core, insert terminal surface coupling joint 4 with the fibre core, terminal surface and protective layer 10 pass through insulating cement 9 fixed connection before terminal surface coupling joint 4, get rid of unnecessary fibre core, make fibre core terminal surface and terminal surface coupling joint 4 parallel and level, the tail end of optic fibre 3 is fixed with terminal surface coupling joint 4's link terminal surface parallel and level this moment.

Referring to fig. 3, the installation method when the tail end of the adapter connector 6 is sleeved outside the ferrule connecting seat 7 is as follows: the interior of the adapter connector 6 is of a through structure, a fifth blocking step is arranged at the head end, during installation, the protective layer 10 at the head end of the optical fiber 3 is removed, the fiber core of the optical fiber 3 is inserted into the ferrule 2, the fiber core beyond the head end of the ferrule 2 is removed, the end part of the fiber core is flush with the front end face of the ferrule 2, the ferrule connecting seat 7 is installed at the tail end of the ferrule 2, the open ceramic sleeve 12 is sleeved in from the front end of the ferrule 2, the tail end of the open ceramic sleeve 12 abuts against the front end face of the ferrule connecting seat 7, the ferrule provided with the open ceramic sleeve 12 and the ferrule connecting seat 7 is inserted into the adapter connector 6, an assembly allowance is reserved between the head end of the open ceramic sleeve 12 and the fifth blocking step, the head end of the open ceramic sleeve 12 is prevented from contacting with the head end of the open ceramic sleeve 12, elastic deformation of the open ceramic sleeve 12 is prevented from being influenced, the sixth blocking step is arranged at the tail end of the adapter connector 6, and the front end face of the ferrule connecting seat 7 is abutted against the sixth blocking step, then the protective layer 10 at the tail end of the optical fiber 3 is removed to expose the fiber core, the fiber core is connected with the end face coupling joint 4, and the tail end of the optical fiber 3 is flush with the end face of the connecting end of the end face coupling joint 4, so that the installation is completed.

During connection, the adapter connector 6 is inserted into external optical fiber equipment for connection, and the end face coupling connector 4 is connected with a planar optical waveguide device 5 such as a PLC (programmable logic controller) so that the tail end of the optical fiber 3 is in coupling butt joint with a waveguide.

The application provides an optical fiber adapter can increase the terminal surface coupling structure that can make optical fiber 3 and waveguide direct coupling dock with planar optical waveguide device 5 lug connection such as PLC at the tail end of optical fiber 3, need not to use lens focus to carry out the coupling, so alright make optical fiber adapter and planar optical waveguide device 5 carry out the direct coupling and be connected under the condition that does not increase original optical fiber adapter size structure, can encapsulate this optical fiber adapter.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (10)

1. The utility model provides an optical fiber adapter, includes casing (1) and lock pin (2), casing (1) both ends link up and the head end is used for pegging graft with external equipment, lock pin (2) wear to establish inside casing (1), its characterized in that, wear to be equipped with optic fibre (3) in lock pin (2), optic fibre (3) head end is worn to establish in lock pin (2) and with the preceding terminal surface parallel and level of lock pin (2), the tail end of optic fibre (3) is worn out casing (1) and be connected with terminal surface coupling joint (4) that are used for being connected with planar optical waveguide device (5), the tail end of optic fibre (3) with the link terminal surface parallel and level of terminal surface coupling joint (4).

2. The optical fiber adapter according to claim 1, wherein the end face of the end face coupling joint (4) connected with the planar optical waveguide device (5) is a bevel face, and the bevel face is parallel to the end face of the connected end of the planar optical waveguide device (5).

3. The fiber optic adapter of claim 2, wherein the ramp is inclined at an angle α, wherein α is greater than or equal to 0 and less than or equal to 11.

4. A fiber optic adapter according to claim 3 wherein α is a real number.

5. The fiber adapter according to any one of claims 1 to 4, wherein the end face coupling joint (4) is a glass capillary or a quartz silicon substrate.

6. The fiber optic adapter according to claim 1, wherein the ferrule (2) is ceramic.

7. The fiber optic adapter of claim 1, wherein the housing (1) comprises an adapter connector (6) and a ferrule connector holder (7), the ferrule connector holder (7) being plugged at a rear end of the adapter connector (6).

8. Fiber optic adapter according to claim 7, characterized in that an insulator is provided between the ferrule holder (7) and the adapter connector head (6).

9. Fiber optic adapter according to claim 8, characterized in that an open ceramic sleeve (12) is provided between the outside of the ferrule (2) and the adapter connector (6).

10. A fiber optic adapter according to claim 1, characterized in that the optical fiber (3) is a single mode fiber (3) or a multimode fiber (3).

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