CN219349189U

CN219349189U - Polarization maintaining fiber connector

Info

Publication number: CN219349189U
Application number: CN202221748036.4U
Authority: CN
Inventors: 蔡宣盘; 陆继乐; 赵德平; 段誉; 曹丁象; 徐迎彬; 谢昌斌; 王碧明; 雷芬芬; 刘文东; 卢子荣; 于浩然
Original assignee: Zhuhai Guangyan Technology Co ltd
Current assignee: Zhuhai Guangyan Technology Co ltd
Priority date: 2022-07-07
Filing date: 2022-07-07
Publication date: 2023-07-14
Anticipated expiration: 2032-07-07

Abstract

The utility model discloses a polarization maintaining optical fiber connector which comprises an inner frame sleeve, a ceramic ferrule, a ferrule tail handle, a spring, a nut, a stop tail handle and a tail sleeve, wherein the length range of the inner aperture of the ceramic ferrule is 3-4 mm, the ceramic ferrule and the ferrule tail handle are in butt joint and fixed through a first preset matching structure, the front end of the stop tail handle is fixed on the outer surface of the ferrule tail handle through the spring, the inner frame sleeve is used for fixing the inner ferrule, the ferrule tail handle and the front end of the stop tail handle through a second preset structure, the tail sleeve is sleeved on the outer surface of the rear end of the stop tail handle, and the nut is used for fixing the inner frame sleeve, the stop tail handle and the tail sleeve through a third preset matching structure. The embodiment of the utility model can improve the extinction ratio and has good stability, and can be widely applied to the technical field of optical communication.

Description

Polarization maintaining fiber connector

Technical Field

The utility model relates to the technical field of optical communication, in particular to a polarization maintaining optical fiber connector.

Background

The polarization maintaining fiber connector is used as a special connecting device and is widely applied to fiber sensing equipment, planar waveguides, interferometry, EDFA, fiber gyroscopes, coherent light transmission or long-distance bidirectional light transmission systems. However, the extinction ratio of the current polarization maintaining fiber connectors needs to be further improved.

Disclosure of Invention

Accordingly, an objective of the embodiments of the present utility model is to provide a polarization maintaining fiber connector, which can improve the extinction ratio and has good stability.

The embodiment of the utility model provides a polarization maintaining optical fiber connector, which comprises an inner frame sleeve, a ceramic ferrule, a ferrule tail handle, a spring, a nut, a stop tail handle and a tail sleeve, wherein the length range of the inner aperture of the ceramic ferrule is 3-4 mm, the ceramic ferrule and the ferrule tail handle are in butt joint and fixed through a first preset matching structure, the front end of the stop tail handle is fixed on the outer surface of the ferrule tail handle through the spring, the inner frame sleeve is used for fixing the inner ferrule, the ferrule tail handle and the front end of the stop tail handle through a second preset matching structure, the tail sleeve is sleeved on the outer surface of the rear end of the stop tail handle, and the nut is used for fixing the inner frame sleeve, the stop tail handle and the tail sleeve through a third preset matching structure.

Optionally, the first preset mating structure is a circular mating structure.

Optionally, the second preset mating structure is a second square-sided mating structure.

Optionally, the third preset mating structure is a third square-sided mating structure.

Optionally, the second square-sided mating structure includes any one of a rectangular mating structure, a square mating structure, a diamond mating structure, or a trapezoid mating structure.

Optionally, the third square-shaped mating structure includes any one of a rectangular mating structure, a square mating structure, a diamond mating structure, or a trapezoid mating structure.

Optionally, the tail sleeve is a plastic tail sleeve.

The embodiment of the utility model has the following beneficial effects: according to the embodiment of the utility model, the length of the internal aperture of the ceramic ferrule is reduced to reduce the length of the optical fiber bonding glue, so that the shrinkage stress after the glue is solidified is reduced, the solidification uniformity of the glue is improved, and the extinction ratio of the polarization maintaining optical fiber connector is improved; the fixed butt joint of ceramic lock pin and lock pin tail handle is realized through first supporting structure of predetermineeing, and inside casing cover is through the fixed inside ceramic lock pin of the supporting structure of second predetermineeing, lock pin tail handle and the front end of stopping tail handle, and the nut is through the inside casing cover of the fixed inside of third predetermined supporting structure, stopping tail handle and tail cover to realize that the lock pin can not rotate about the use, ensure optic fibre stress bar and connector KEY position, guarantee optic fibre light transmission polarization direction simultaneously, thereby improve polarization maintaining optical fiber connector's stability and extinction ratio.

Drawings

FIG. 1 is a schematic cross-sectional view of a polarization maintaining fiber connector according to an embodiment of the present utility model;

fig. 2 is a schematic structural diagram of a split component of a polarization maintaining fiber connector according to an embodiment of the present utility model;

FIG. 3 is a schematic structural view of a ferrule tail handle according to an embodiment of the present utility model;

FIG. 4 is a schematic diagram of an assembled ceramic ferrule and ferrule tail handle according to an embodiment of the present utility model;

fig. 5 is a schematic structural view of an inner casing according to an embodiment of the present utility model;

fig. 6 is a schematic diagram of an end-face alignment of a polarization maintaining fiber connector according to an embodiment of the present utility model.

Detailed Description

The utility model will now be described in further detail with reference to the drawings and to specific examples.

Referring to fig. 1 and 2, an embodiment of the present utility model provides a polarization maintaining fiber connector, which includes an inner frame sleeve 01, a ceramic ferrule 02, a ferrule tail handle 03, a spring 04, a nut 05, a stop tail handle 06 and a tail sleeve 07, wherein a length L of an internal aperture of the ceramic ferrule 02 ranges from 3mm to 4mm, the ceramic ferrule 02 and the ferrule tail handle 03 are in butt joint fixation through a first preset matching structure, a front end of the stop tail handle 06 is fixed on an outer surface of the ferrule tail handle 03 through the spring 04, the inner frame sleeve 01 is fixed on inner portions of the ceramic ferrule 02, the ferrule tail handle 03 and a front end of the stop tail handle 06 through a second preset matching structure, a rear end outer surface of the stop tail handle 06 is sleeved with the tail sleeve 07, and the nut 05 is fixed on inner frame sleeve 01, the stop tail handle 06 and the tail sleeve 07 through a third preset matching structure.

In fig. 1, the optical fibers 08 are connected by the polarization maintaining fiber connector of the present embodiment.

At present, the extinction ratio of a general optical fiber connector can only reach about 20 dB-24 dB, and the extinction ratio is even lower than 20dB, while the extinction ratio parameter of the polarization maintaining optical fiber and the connector is required to be more than 23 dB; in addition, the extinction ratio qualification rate of the connector produced by the conventional ceramic ferrule is only about 80-85%. In the embodiment, the extinction ratio of the polarization maintaining fiber connector is more than 25dB, and the qualification rate of the extinction ratio is more than 90%.

Optionally, the first preset mating structure is a circular mating structure.

It should be noted that, the first preset matching structure is determined according to practical application, and the embodiment is not limited specifically. For example, the first preset mating structure includes, but is not limited to, a circular mating structure.

Specifically, referring to fig. 3 and 4, fig. 3 (a) is a perspective view of the ferrule tail shank, and fig. 3 (b) is a cross-sectional view of the ferrule tail shank along the BB direction; fig. 4 (a) is a perspective view of the assembled ceramic ferrule and ferrule boot handle, and fig. 4 (b) is a cross-sectional view along AA direction of the assembled ceramic ferrule and ferrule boot handle. As can be seen from fig. 3 and fig. 4, the front end of the ferrule tail handle has a circular structure inside and a quadrilateral structure outside, the circular structure inside is used for fixedly butting with the optical fiber, and the quadrilateral structure outside is fixedly butted with the inner frame sleeve.

It should be noted that, the second preset matching structure is determined according to practical application, and the embodiment is not limited specifically. For example, the second preset mating structure includes, but is not limited to, any one or more of a rectangular mating structure, a square mating structure, a diamond mating structure, or a trapezoidal mating structure.

Specifically, referring to fig. 5, fig. 5 (a) is a perspective view of the inner casing, and fig. 5 (b) is a sectional view of the inner casing in the CC direction. As can be seen from fig. 5, the inner structure of the inner casing is more than one, wherein the inner structure of the inner casing comprises a quadrilateral structure matched with the tail handle of the ferrule, and also comprises a circular structure matched with the ceramic ferrule.

It should be noted that, the third preset matching structure is determined according to practical application, and the embodiment is not limited specifically. For example, the third preset mating structure includes, but is not limited to, any one or more of a rectangular mating structure, a square mating structure, a diamond mating structure, or a trapezoidal mating structure.

Optionally, the tail sleeve is a plastic tail sleeve.

It should be noted that, the tail sleeve has elasticity, and the material of the tail sleeve is determined according to practical application, and the embodiment is not particularly limited. The plastic tail sleeve can fix the optical fiber and the stop tail handle, so that shaking is reduced, and the cost of the plastic tail sleeve is relatively low.

The method for using the polarization maintaining fiber connector in this embodiment is as follows: firstly, filling glue in a ceramic ferrule, and penetrating a treated optical fiber into an inner hole of the ceramic ferrule; when the glue is not cured, amplifying the stress rod on the end face of the optical fiber by a CCD video microscope, rotating the optical fiber by a clamp to enable the stress rod to be aligned with a key of the connector, wherein the alignment angle is controlled within +/-2 degrees, referring to FIG. 6, X represents a fast axis, X represents a slow axis, 1-1 represents a ceramic contact pin, 1-2 represents an optical fiber core, 1-3 represents a stress region, 1-4 represents a key, and theta represents a deflection angle of an input polarization state; and pre-fixing the optical fibers after alignment, and heating and curing glue after fixing. Then, the ceramic lock pin and the lock pin tail handle are assembled together through cold pressing, the front end of the lock pin tail handle is fixedly connected with the stop tail handle through a spring, the ceramic lock pin, the lock pin tail handle and the stop tail handle are fixedly connected through an inner frame sleeve, the tail sleeve is connected to the tail end of the stop tail handle, and the stop tail handle of the inner frame sleeve is fixed through a nut.

Claims

1. The utility model provides a polarization maintaining optical fiber connector, its characterized in that includes inside casing cover, pottery lock pin, lock pin tail handle, spring, nut, stop tail handle and tail cover, the length range of pottery lock pin internal aperture is 3mm ~ 4mm, the pottery lock pin with the lock pin tail handle is fixed through the butt joint of first supporting structure of predetermineeing, the front end of stop tail handle passes through the spring is fixed the surface of lock pin tail handle, the inside casing cover is through the second is predetermineeed supporting structure and is fixed inside pottery lock pin, lock pin tail handle and the front end of stop tail handle, the rear end surface of stop tail handle cup joints the tail cover, the nut is through the third is predetermineeed supporting structure is fixed inside casing cover, stop tail handle and the tail cover.

2. The connector of claim 1, wherein the first predetermined mating structure is a circular mating structure.

3. The connector of claim 1, wherein the second predetermined mating structure is a second square-sided mating structure.

4. The connector of claim 1, wherein the third predetermined mating structure is a third square-sided mating structure.

5. The connector of claim 3, wherein the second square-shaped mating structure comprises any one of a rectangular mating structure, a square mating structure, a diamond mating structure, or a trapezoidal mating structure.

6. The connector of claim 4, wherein the third square-shaped mating structure comprises any one of a rectangular mating structure, a square mating structure, a diamond mating structure, or a trapezoidal mating structure.

7. The connector of claim 1, wherein the boot is a plastic boot.