CN209879062U - Optical fiber ferrule, optical fiber connector and optical module - Google Patents

Abstract

The application discloses an optical fiber ferrule, which comprises a ferrule body and an optical fiber; the ferrule body is provided with a ferrule through hole, and the optical fiber is fixed in the ferrule through hole; the ferrule body is provided with an insertion end face, the optical fiber is provided with a connection end face, the connection end face is provided with an inclined included angle relative to the insertion end face, and the connection end face is concavely arranged in the ferrule through hole. The connection end face of the optical fiber in the optical fiber ferrule has a slight inward-contraction inclination angle relative to the insertion end face of the ferrule body, so that the optical fiber ferrule can be prevented from damaging the optical fiber end face in the insertion process, and the problem of plane interference is solved.

Description

Optical fiber ferrule, optical fiber connector and optical module

Technical Field

The application relates to the technical field of optical communication, in particular to an optical fiber ferrule, an optical fiber connector and an optical module.

Background

In the optical communication industry, optical fibers are widely used for transmission of optical signals. When an optical fiber is used to transmit an optical signal, the optical fiber may need to be interfaced with other optical components to achieve signal transmission between optical devices or modules. For example, fiber optic connectors are used to enable signal transmission between two optical modules; in an optical module, a lens couples an optical signal into an optical fiber, or a signal in the optical fiber is transmitted to a lens, a receiver, and other elements, and signal transmission between the optical fiber and the optical fiber involves a signal transmission problem at an end face of the optical fiber. The quality of the fiber end face has a large impact on the optical signal transmission quality and speed. Yield loss caused by the quality of the end face of an optical fiber in a commonly used optical module is common. The quality of the optical fiber end face is more caused by plugging damage.

Chinese patent application CN201320364501.9 discloses an optical fiber patch cord that employs optical fiber retraction to protect the optical fiber from damage. The design of this fiber draw-in affects the optical coupling efficiency.

Disclosure of Invention

An object of this application is to provide an optic fibre lock pin, fiber connector and optical module, the difficult production damage of terminal surface of this optic fibre lock pin can guarantee signal transmission's quality.

In order to achieve one of the above objects, the present application provides an optical fiber ferrule, including a ferrule body and an optical fiber; the ferrule body is provided with a ferrule through hole, and the optical fiber is fixed in the ferrule through hole; the ferrule body is provided with an insertion end face, the optical fiber is provided with a connection end face, the connection end face is provided with an inclined included angle relative to the insertion end face, and the connection end face is concavely arranged in the ferrule through hole.

In one embodiment, the plane of the plug end face is perpendicular to the axial direction of the optical fiber.

In one embodiment, the connection end face is inclined at an angle of 0.5 to 5 degrees with respect to the insertion end face.

In one embodiment, the connection end face is plated with an antireflection film.

In one embodiment, the ferrule body is made of a ceramic material.

In one embodiment, a partial edge of the connection end face abuts against the plug end face.

In one embodiment, this is as follows.

The application also provides an optical fiber connector, which comprises the optical fiber ferrule of the embodiment.

The application also provides an optical module, which comprises the optical fiber ferrule in the embodiment.

The beneficial effect of this application: the connection terminal surface of the optic fibre in the optic fibre lock pin of this application has slight angle of inclination that contracts inwards for the grafting terminal surface of lock pin body, can prevent like this that the optic fibre lock pin from causing the damage to the optic fibre terminal surface at the grafting in-process, and furthest reduces the coupling loss simultaneously, effectively solves the plane interference problem.

Drawings

FIG. 1 is a schematic diagram of an optical fiber connector according to an embodiment of the present application;

FIG. 2 is a front view of the fiber optic connector of FIG. 1;

fig. 3 is an enlarged view of the internal structure of the optical fiber ferrule of the optical fiber connector shown in fig. 2.

Detailed Description

The present application will now be described in detail with reference to specific embodiments thereof as illustrated in the accompanying drawings. These embodiments are not intended to limit the present application, and structural, methodological, or functional changes made by those skilled in the art according to these embodiments are included in the scope of the present application.

In the various illustrations of the present application, certain dimensions of structures or portions may be exaggerated relative to other structures or portions for ease of illustration and, thus, are provided to illustrate only the basic structure of the subject matter of the present application.

Also, terms used herein such as "upper," "above," "lower," "below," and the like, denote relative spatial positions of one element or feature with respect to another element or feature as illustrated in the figures for ease of description. The spatially relative positional terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. When an element or layer is referred to as being "on," or "connected" to another element or layer, it can be directly on, connected to, or intervening elements or layers may be present.

Referring to fig. 1 and 2, an embodiment of the present application provides an optical fiber connector 100. In this embodiment, the optical fiber connector 100 is an LC type optical fiber connector. In other embodiments, the optical fiber connector 100 may be an SC-type, FC-type, ST-type, MU-type, or other types of optical fiber connectors.

The optical fiber connector 100 includes a connector housing 20, an optical fiber stub 10 disposed in the connector housing 20, and an optical fiber cable 30 connected to the connector housing 20. The connector housing 20 is also fixed with a spring plate 40. The optical fiber ferrule 10 is used for being butted with an optical port of an optical module to realize transmission of optical signals. The optical fiber connector 100 is similar to a conventional LC-type optical fiber connector, and will not be described herein.

Referring to fig. 3, fig. 3 is a structural diagram of the optical fiber ferrule 10 of the optical fiber connector 100. Here, in order to clearly show the internal structure of the optical fiber ferrule 10, the plane of the optical fiber ferrule 10 along the axial direction of the optical fiber ferrule is sectioned, and the leftmost part in fig. 2 is cut and enlarged. The fiber stub 10 includes a stub body 11 and an optical fiber 13. The ferrule body 11 is provided with a ferrule through hole 14, and the optical fiber 13 is fixed in the ferrule through hole 14. The ferrule body 11 has an insertion end face 15, the optical fiber has a connection end face 16, and the connection end face 16 has an inclined included angle a with respect to the insertion end face 15. The connection end face 16 is recessed in the ferrule through-hole 14. The connection end face 16 being recessed in the ferrule through-hole 14 means that the connection end face 16 does not protrude from the insertion end face 15.

In this embodiment, the ferrule body 11 is made of a ceramic or plastic material. The optical fiber 13 is made of glass. The optical fiber 13 is provided with a coating layer, a cladding layer, and a core layer from the outside to the inside. The optical fiber 13 is cylindrical and matches with the ferrule through hole 14. The plane of the plugging end surface 15 of the ferrule body 11 is perpendicular to the axial direction of the optical fiber 13. The connection end face 16 of the optical fiber 13 is plated with an antireflection film. Part of the edge of the connection end face 16 abuts against the insertion end face 15, that is, the connection end face 16 is inclined from the insertion end face 15 into the ferrule through hole 14. The angle of inclination a of the connecting end face 16 with respect to the plugging end face is 0.5 to 5 degrees, and in this embodiment, this angle of inclination a is 4 degrees. The angle of the inclined angle a is enlarged for convenience of viewing in fig. 3.

When the optical fiber connector 100 is butted with other elements (such as an optical module), the optical fiber 13 of the optical fiber ferrule 10 adopts a retracted design, so that the optical fiber can be effectively protected from being damaged, especially in the process of frequent plugging and unplugging operations of the optical fiber connector. Further, since the connection end face 16 of the optical fiber 13 has a fine inclination angle with respect to the insertion end face 15, the optical path loss can be minimized, and the problem of planar interference can be solved.

Of course, in the optical module, the optical fiber ferrule structure in the optical fiber connector in the above embodiment may also be used when the optical fiber is butted with other elements. For example, when two optical fiber ferrules are butted, the optical fiber ferrule structure of the embodiment can be adopted, so that the optical path loss is reduced, the problem of plane interference is solved, and the end faces of the optical fibers are prevented from being damaged.

The above list of details is only for the concrete description of the feasible embodiments of the present application, they are not intended to limit the scope of the present application, and all equivalent embodiments or modifications that do not depart from the technical spirit of the present application are intended to be included within the scope of the present application.

Claims (8)

1. An optical fiber ferrule is characterized by comprising a ferrule body and an optical fiber;

the ferrule body is provided with a ferrule through hole, and the optical fiber is fixed in the ferrule through hole;

the ferrule body is provided with an insertion end face, the optical fiber is provided with a connection end face, the connection end face is provided with an inclined included angle relative to the insertion end face, and the connection end face is concavely arranged in the ferrule through hole.

2. The fiber optic ferrule of claim 1, wherein: the plane of the plug end face is perpendicular to the axial direction of the optical fiber.

3. The fiber optic ferrule of claim 2, wherein: the inclined included angle of the connecting end face relative to the inserting end face is 0.5-5 degrees.

4. The fiber optic ferrule of claim 3, wherein: and an antireflection film is plated on the connecting end face.

5. The fiber optic ferrule of claim 4, wherein: the ferrule body is made of ceramic materials.

6. The fiber optic ferrule of claim 5, wherein: part of the edge of the connecting end surface abuts against the inserting end surface.

7. An optical fiber connector, characterized by: the fiber optic connector includes the fiber stub of any one of claims 1-5.

8. An optical module, characterized in that: comprising the fiber optic ferrule of any of claims 1-5.