CN209117916U - A high-precision dual APC ferrule adapter - Google Patents

Abstract

The utility model relates to a fiber communication technical field, in particular to two APC lock pin adapters of high accuracy, two terminal surfaces of its lock pin all are the inclined plane, have reduced fei nieer reflection phenomenon to insertion loss's influence. The shell of the ferrule adapter is sleeved outside the sleeve, the inner diameter of one end of the ferrule adapter used for installing the ferrule is larger than the outer diameter of the sleeve, the ferrule is inserted into the sleeve, the insertion end of the ferrule positioning seat is clamped between the inside of the shell of the ferrule adapter and the outside of the sleeve, and the clamping end of the ferrule positioning seat wraps one section of the periphery of the ferrule. The shell of the ferrule adapter, the ferrule and the sleeve are connected through the ferrule positioning seat, a tight fit structure is formed by controlling the size matching among the parts, the optical fiber ferrule adapter and the ferrule of the butt joint end adapter are assembled and fixed without adopting a welding or glue dispensing mode, the process precision is easy to control, the production cost is reduced, and the dual optimization of the product quality and the cost is realized.

Description

A high-precision dual APC ferrule adapter

technical field

The utility model relates to the technical field of optical fiber communication, in particular to a high-precision double APC ferrule adapter.

Background technique

Optical fiber communication is a communication system that transmits information with light through photoelectric conversion. Lasers and optical fiber ferrule adapters are important components of optical fiber communication systems. The laser packaging technology has high requirements. The light emitted by the optical chip is transmitted to the coupling end of the optical fiber ferrule adapter. When it is transmitted to the butt-end adapter ferrule through the optical fiber adapter, the Fresnel reflection phenomenon will occur on the end faces of the two ferrules. Light will directly affect the normal operation of optical devices and reduce product quality. However, as a transmission connector, the optical fiber ferrule adapter also requires low insertion loss, otherwise it will directly affect the quality of the optical fiber communication system.

At present, the commonly used method to reduce the Fresnel reflection phenomenon is to design both the coupling end and the butt end of the fiber ferrule adapter to be inclined at an angle of 8 degrees. In this way, the light emitted by the laser optical chip is transmitted to the fiber ferrule. When the adapter is used, the reflected light generated will not be reflected back vertically, and the normal operation of the laser can be realized. However, the design of the inclined plane is not easy to assemble. Adapter manufacturers generally use welding or dispensing to realize the assembly and fixation of the optical fiber ferrule adapter and the butt end adapter ferrule. During the assembly process, first press the ferrule on the positioning ferrule seat, grind the ferrule at both ends at an angle of 8 degrees through the ferrule seat flat, then assemble the assembled ferrule positioning seat on the lower sleeve of the adapter, and finally, by welding Or the dispensing process can directly achieve product assembly and fixation. However, the processing cost of welding is high, which is not conducive to mass production; after the adapter is assembled, the internal space is compact, the fluidity and quantity of glue are required to be high, and the process accuracy is difficult to guarantee, which makes the product reliability risk of the dispensing process relatively high. high.

Utility model content

The purpose of the utility model is to avoid the above-mentioned deficiencies in the prior art and provide a high-precision dual APC ferrule adapter with simple production and low cost.

In order to achieve the above purpose, a high-precision double APC ferrule adapter is provided, which includes a coaxial ferrule adapter shell, a ferrule, a sleeve and a ferrule positioning seat, and the two end faces of the ferrule are aligned with the ferrule axis. The vertical line of the ferrule forms an inclined plane with an included angle. The ferrule adapter shell is sleeved on the outside of the sleeve and has an interference fit with it. The inner diameter of one end of the ferrule adapter shell used to install the ferrule is larger than the outer diameter of the sleeve, and the inner diameter of the sleeve is the same as the ferrule. The outer diameter matches, and the ferrule positioning seat includes a clamping end for wrapping a section of the outer periphery of the ferrule and for interference fit with it, and an insertion end whose inner diameter matches the outer diameter of the sleeve. The insertion end of the ferrule positioning seat is clamped between the inside of the ferrule adapter shell and the outside of the sleeve, and the ferrule and the sleeve are in an interference fit.

Wherein, the two opposite outer sides of the clamping end of the ferrule positioning seat are planes parallel to each other.

Wherein, the inclined plane of the end face of the ferrule is inclined from one plane of the clamping end to another plane opposite to it.

Wherein, an annular step is provided between the clamping end and the insertion end inside the ferrule positioning seat, and the insertion end of the ferrule positioning seat is clamped between the inside of the ferrule adapter shell and the outside of the sleeve, then the annular step The end face of the sleeve is against the end face of the sleeve.

Wherein, an annular surface is formed at the connection between the inner part of the ferrule adapter shell and the outer side of the sleeve with interference fit and the part larger than the outer diameter of the sleeve, and the insertion end of the ferrule positioning seat abuts the annular surface.

Wherein, the contact surface between the annular surface and the insertion end of the ferrule positioning seat is set as an arc surface.

Wherein, the two end faces of the ferrule are the coupling end exposed outside the adapter shell and the butt end inserted into the sleeve, and the inclination angle and direction of the coupling end and the butt end are the same.

Wherein, the angle of the included angle is 5-13 degrees.

Wherein, the sleeve is a ceramic sleeve.

Among them, the fiber core arranged on the axis of the ferrule is included.

Beneficial effect: In the high-precision double APC ferrule adapter, the two end faces of the ferrule are inclined planes that form an angle with the vertical line of the ferrule axis, which reduces the influence of the Fresnel reflection phenomenon on the insertion loss. The core positioning seat is used to connect the ferrule adapter shell, ferrule and sleeve, and form a tight fitting structure by controlling the size matching between these components, without welding or dispensing to realize the fiber optic ferrule adapter and the butt end adapter ferrule The assembly is fixed, the process accuracy is easy to control, the production cost is reduced, and the double optimization of product quality and cost is realized.

Description of drawings

Figure 1 is a schematic diagram of the external structure of the high-precision dual APC ferrule adapter.

FIG. 2 is a schematic diagram of the disassembled structure of the high-precision dual APC ferrule adapter.

FIG. 3 is a schematic diagram of the matching structure of the high-precision dual APC ferrule adapter.

FIG. 4 is a schematic diagram of the end face structure of the high-precision double APC ferrule adapter.

Detailed ways

The high-precision dual APC ferrule adapter is shown in Figures 1 to 3. It includes a ferrule adapter shell 1, a ferrule 2, a sleeve 3 and a ferrule positioning seat 4 that are coaxially arranged. The fiber core is arranged on the axis of the ferrule 2. Heart. The two end faces of the ferrule 2 are the coupling end exposed outside the adapter shell and the butt end inserted into the ceramic sleeve 3. Both the coupling end and the butt end form an included angle of 8 degrees with the vertical line of the axis of the ferrule 2 ( The angle of the included angle is between 5 and 13 degrees), and the inclination angles α, β and directions of the two are the same, which reduces the influence of the Fresnel reflection phenomenon on the insertion loss.

The ferrule adapter shell 1 is sleeved on the outside of the ceramic sleeve 3 and has an interference fit with it. The inner diameter of one end of the ferrule adapter shell 1 used to install the ferrule 2 is larger than the outer diameter of the ceramic sleeve 3, and the inner diameter of the ceramic sleeve 3 is the same as that of the ferrule 2. The outer diameter is matched, and the ferrule positioning seat 4 includes a clamping end for wrapping the periphery of the ferrule 2 and interference fit with it, and an insertion end whose inner diameter matches the outer diameter of the ceramic sleeve 3, and the ferrule 2 is inserted into the ceramic sleeve. Inside the barrel 3, the insertion end of the ferrule positioning seat 4 is clamped between the inside of the ferrule adapter shell 1 and the outside of the ceramic sleeve 3, and the ferrule 2 and the ceramic sleeve 3 are in an interference fit. The ferrule adapter shell 1, the ferrule 2 and the ceramic sleeve 3 are connected through the ferrule positioning seat 4, and a tight fitting structure is formed by controlling the size matching between these components, and the fiber ferrule does not need to be welded or dispensed. The adapter and the butt-end adapter ferrule 2 are assembled and fixed, which is easy to control the process precision, reduces the production cost, and realizes the double optimization of product quality and cost.

Specifically, the two opposite outer sides of the clamping end of the ferrule positioning seat 4 are flat positions 41 formed by mutually parallel planes as shown in FIG. The upper flat 41 of the end slopes toward the lower flat 41 opposite it. The flat position 41 of the ferrule positioning seat 4 corresponds to the angle of the ferrule end face in the ferrule adapter. When using the ferrule adapter, the direction and angle of the ferrule end face can be determined only by observing the direction and angle of the flat position 41 , to ensure that the plugging action of the optical device product is not easy to make mistakes and has high repeatability.

There is an annular step between the clamping end and the insertion end inside the ferrule positioning seat 4, and the insertion end of the ferrule positioning seat 4 is clamped between the inside of the ferrule adapter shell 1 and the outside of the ceramic sleeve 3, then the The end face of the annular step abuts the end face of the ceramic sleeve 3 .

A ring surface 11 is formed at the connection between the inner part of the ferrule adapter shell 1 and the outer side of the ceramic sleeve 3 with interference fit and the part larger than the outer diameter of the ceramic sleeve 3, and the insertion end of the ferrule positioning seat 4 abuts the ring surface 11. Specifically, the contact surface between the annular surface 11 and the insertion end of the ferrule positioning seat 4 is set as an arc surface.

The production process of this high-precision dual APC ferrule adapter is as follows:

(1) The two flat positions of the ferrule positioning seat are processed, and the centers of the two are symmetrical;

(2) Using a pneumatic press-fitting machine, press the ferrule 2 into the ferrule positioning seat 4 to complete the assembly of the ferrule 2 and the ferrule positioning seat 4;

(3) Use the optical fiber grinding jig to clamp the two flat positions 41 of the ferrule positioning seat 4, and then grind the two end faces of the ferrule 2 to make them at an angle of 8 degrees to ensure that the flat positions 41 of the ferrule positioning seat 4 and the ferrule 2 The height consistency of the inclined 8-degree angle at both ends;

(4) Insert the ceramic sleeve 3 into the ferrule adapter shell 1 to complete the assembly of the ferrule adapter shell 1 and the ceramic sleeve 3;

(5) Using a pneumatic press-fitting machine, press the ferrule 2 with a good angle through the ferrule positioning seat 4 flat and the ferrule adapter shell 1 flat, and press it into the ferrule adapter shell 1 to complete the double APC ferrule adapter assembly.

Claims (10)

1. a kind of double APC lock pin adapters of high-precision, which is characterized in that including coaxial lock pin adapter shell, lock pin, sleeve With lock pin positioning seat, two end faces of the lock pin are all the inclined-plane with the veritcal linearity of lock pin axis in an angle, lock pin Adapter shell is covered on the outside of sleeve and is interference fitted with it, and the internal diameter of one end that lock pin adapter shell is used to install lock pin is big In sleeve outer diameter, sleeve diameter matches with lock pin outer diameter, lock pin positioning seat include for wrap one section of lock pin periphery and The insertion end that the clamping end being interference fitted with it and internal diameter and sleeve outer diameter match, the lock pin are inserted into sleeve then described insert The insertion end of core positioning seat is stuck in inside lock pin adapter shell between cartridge exterior, and the lock pin and the sleeve interference are matched It closes.

2. a kind of double APC lock pin adapters of high-precision according to claim 1, which is characterized in that the lock pin positioning seat Two opposite lateral surfaces of clamping end be the plane being parallel to each other.

3. a kind of double APC lock pin adapters of high-precision according to claim 2, which is characterized in that the end face of the lock pin Inclined-plane from a plane of clamping end to another plane inclination corresponding thereto.

4. a kind of double APC lock pin adapters of high-precision according to claim 1, which is characterized in that inside lock pin positioning seat Clamping end and insertion end between be equipped with circular step, the insertion end of the lock pin positioning seat is stuck in inside lock pin adapter shell Between cartridge exterior, then the end face of the circular step resists sleeve end face.

5. a kind of double APC lock pin adapters of high-precision according to claim 1 or 4, which is characterized in that outside lock pin adapter Anchor ring is formed with one section be interference fitted on the outside of sleeve and greater than one section of junction of sleeve outer diameter inside shell, the lock pin is fixed The insertion end of position seat resists the anchor ring.

6. a kind of double APC lock pin adapters of high-precision according to claim 5, which is characterized in that the anchor ring with it is described The contact surface of the insertion end of lock pin positioning seat is set as cambered surface.

7. a kind of double APC lock pin adapters of high-precision according to claim 1, which is characterized in that two of the lock pin End face is the butt end in the coupled end and insertion sleeve exposed outside adapter shell, the tilt angle of coupled end and butt end It is all identical with direction.

8. according to claim 1 or 7 or a kind of double APC lock pin adapters of high-precision, which is characterized in that the angle Angle is 5~13 degree.

9. a kind of double APC lock pin adapters of high-precision according to claim 1, which is characterized in that the sleeve is ceramics Sleeve.

10. a kind of double APC lock pin adapters of high-precision according to claim 1, which is characterized in that including being arranged in lock pin Axle center fibre core.