CN214669714U

CN214669714U - Optical fiber collimator

Info

Publication number: CN214669714U
Application number: CN202120071109.XU
Authority: CN
Inventors: 张振; 李崇聪; 李跃
Original assignee: Fujin Precision Industry Jincheng Co ltd
Current assignee: Fujin Precision Industry Jincheng Co ltd
Priority date: 2021-01-12
Filing date: 2021-01-12
Publication date: 2021-11-09
Anticipated expiration: 2031-01-12

Abstract

The utility model provides an optical fiber collimator, including first fixed cover, the fixed cover of second, lens and lock pin, first fixed cover is connected to the fixed cover of second, be equipped with the sleeve pipe in the fixed cover of second, in first fixed cover is located to lens, the lock pin is located the cover of the fixed cover of first fixed cover and second respectively intraductal, and separate the setting with lens, first fixed cover is followed its axis direction and is seted up the inside adjustment tank of the first fixed cover of intercommunication, optical fiber collimator is still including adjusting pole and fixed block, adjust the pole and locate in the adjustment tank and connect in lens, adjust the position of pole in the adjustment tank, drive lens and remove in first fixed cover, with the position of adjustment lens and lock pin, the fixed block is located in the adjustment tank, a position for fixed lens in first fixed cover. The optical fiber collimator is provided with the adjusting groove on the first fixing sleeve, the position of the lens in the adjusting groove is adjusted through the adjusting rod, the position relation of the lens and the inserting core is further adjusted, coupling between the lens and the inserting core is facilitated, and transmission efficiency and optical power are improved.

Description

Optical fiber collimator

Technical Field

The application relates to the field of optical signals, in particular to an optical fiber collimator.

Background

Along with the machine room space is smaller and smaller, the structure of the optical fiber collimator also tends to be miniaturized, but the existing optical fiber collimator has more components and is more complex to assemble, and the positions of the lens and the ferrule are not convenient to adjust in the assembling process.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide a fiber collimator that can adjust the position of the lens and ferrule during assembly.

The embodiment of the application provides an optical fiber collimator, including the fixed cover of first fixed cover, second, lens and lock pin, the fixed cover of second is connected first fixed cover, be equipped with the sleeve pipe in the fixed cover of second, lens are located in the fixed cover of first fixed cover, the lock pin is located respectively in the sleeve pipe of first fixed cover with the fixed cover of second, and with the lens is separated and is set up, first fixed cover is seted up the intercommunication along its axis direction the inside adjustment tank of first fixed cover, optical fiber collimator still includes regulation pole and fixed block, the regulation pole is located in the adjustment tank and be connected in lens, adjust the position of adjusting the pole in the adjustment tank, drive lens are in first fixed cover removes to the adjustment lens with the position of lock pin, the fixed block is located in the adjustment tank, for fixing the position of the lens within the first stationary sleeve.

Further, in some embodiments of the present application, the first fixing sleeve is provided with a stepped through hole, and the lens and the ferrule are disposed in the through hole with the same radius.

Further, in some embodiments of the present application, the stepped through hole includes a first hole, a second hole and a third hole, the lens is disposed in the first hole and the second hole, one end of the ferrule is disposed in the sleeve, the other end of the ferrule protrudes out of the sleeve and is disposed in the second hole, and the second fixing sleeve is disposed in the third hole to connect the first fixing sleeve.

Further, in some embodiments of the present application, the second fixing sleeve is provided with a fourth hole, the sleeve is disposed in the fourth hole, and a radius of the fourth hole is larger than a radius of the second hole.

Further, in some embodiments of the present application, the ferrule has an outer diameter greater than a radius of the first bore.

Further, in some embodiments of the present application, an end of the second fixing sleeve is provided with a connection portion having an outer diameter equal to a radius of the third hole, and the outer diameter of the second fixing sleeve is greater than the radius of the third hole.

Further, in some embodiments of the present application, an end of the lens located in the second hole is provided with a first inclined surface, and an end of the ferrule located in the second hole is provided with a second inclined surface, and the first inclined surface is parallel to the second inclined surface.

Further, in some embodiments of the present application, the first angled surface is angled 82 ° from the inner wall of the second bore.

Further, in some embodiments of the present application, the radii of the first hole, the second hole, and the third hole are set from small to large.

Further, in some embodiments of the present application, the width of the adjustment groove is greater than the radius of the adjustment lever, so that the adjustment lever rotates in the circumferential direction of the first fixing sleeve.

Above-mentioned fiber collimator is through setting up the adjustment tank on first fixed cover, through adjusting the position of pole adjustment lens in the adjustment tank, and then the position relation of adjustment lens and lock pin, and the coupling between the lens of being convenient for and the lock pin promotes transmission efficiency and optical power.

Drawings

FIG. 1 is a schematic diagram of a fiber collimator according to an embodiment.

FIG. 2 is a schematic cross-sectional view of a fiber collimator in one embodiment.

Description of the main elements

Optical fiber collimator 100

First fixing sleeve 10

Adjusting groove 11

Through-hole 12

First hole 121

Second hole 122

Third aperture 123

Second fixing sleeve 20

Fourth hole 21

Sleeve 211

Connecting part 22

Lens 30

First inclined surface 31

Ferrule 40

Channel 41

Second inclined surface 42

Adjusting lever 50

The following specific examples will further illustrate the application in conjunction with the above figures.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

Some embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1, the fiber collimator 100 shown in fig. 1 is used to convert the transmitted light in the fiber into collimated light or parallel light, or couple the external parallel or near parallel light into a single-mode fiber. The fiber collimator 100 includes a first fixture sleeve 10, a second fixture sleeve 20, a lens 30, a ferrule 40, an adjustment lever 50, and a fixing block. The second fixing sleeve 20 is arranged outside the first fixing sleeve 10, the lens 30 is arranged inside the first fixing sleeve 10, one end of the insertion core 40 is arranged inside the first fixing sleeve 10 and is spaced from and opposite to the lens 30, and the other end is arranged inside the second fixing sleeve 20. The first fixed cover 10 is provided with an adjusting groove 11 along the axis direction, the adjusting groove 11 is communicated with the inside of the first fixed cover 10, one end of an adjusting rod 50 is connected to the lens 30, the other end of the adjusting rod is arranged in the adjusting groove 11 and protrudes out of the outer wall of the first fixed cover 10, the lens 30 is driven to move in the first fixed cover 10 by adjusting the position of the adjusting rod 50 in the adjusting groove 11, and then the position relation between the lens 30 and the inserting core 40 is adjusted. The fixing block is arranged in the adjusting groove 11 and used for fixing the position of the lens 30 in the first fixing sleeve.

Referring to fig. 2, the first fixing sleeve 10 is provided with a stepped through hole 12, and the lens 30 and the ferrule 40 are disposed in the through hole 12 with the same radius, so as to keep the concentricity of the lens 30 and the ferrule 40 consistent, and avoid the influence of other factors on the concentricity, which results in poor concentricity and influences on optical signal transmission.

In one embodiment, the stepped through-hole 12 includes a first hole 121, a second hole 122, and a third hole 123 arranged in this order. The radii of the first hole 121, the second hole 122, and the third hole 123 are sequentially set from small to large. The first hole 121 communicates with the adjustment groove 11, and one end of the lens 30 is disposed in the first hole 121 and the other end extends into the second hole 122. One end of the ferrule 40 is disposed in the second bore 122 and the other end extends into the second fixture sleeve 20 through the third bore 123. The lens 30 and the ferrule 40 are coaxially arranged in the second hole 122 at the opposite ends, and the lens 30 and the ferrule 40 are coaxially arranged, so that the concentricity of the lens 30 and the ferrule 40 in the second hole 122 is kept consistent, and the influence of other factors on the concentricity, which causes poor concentricity and influences optical signal transmission, is avoided. The third hole 123 has an inner diameter smaller than an outer diameter of the second pouch 20, and the second pouch 20 is disposed in the third hole 123 to be coupled with the first pouch 10.

In one embodiment, the outer diameter of the ferrule 40 is larger than the radius of the first bore 121, preventing the ferrule 40 from entering the first bore 121.

It will be appreciated that the radius of the first aperture 121 is the same as the radius of the lens.

The second fixing sleeve 20 is provided with a fourth hole 21, and the radius of the fourth hole 21 is smaller than the radius of the third hole 123 and larger than the radius of the second hole 122, so that the second fixing sleeve 20 is arranged in the third hole 123 and abuts against the joint of the second hole 122 and the third hole 123. The sleeve 211 is arranged in the fourth hole 21, the ferrule 40 is arranged in the sleeve 211, and the position of the ferrule in the second fixing sleeve 20 is fixed through the sleeve 211. The inner diameter of the sleeve 211 is the same as the radius of the second hole. It is understood that the difference between the radius of the fourth hole 21 and the inner diameter of the sleeve 211 is a single-sided thickness of the sleeve 211.

In one embodiment, the end of the second fixing sleeve 20 is provided with a connecting portion 22, the connecting portion 22 is formed by recessing the end peripheral side of the second fixing sleeve 20 in the axial direction thereof, and the outer diameter of the connecting portion 22 is the same as the inner diameter of the third hole 123 for disposing the connecting portion 22 in the third hole 123.

The ferrule 40 is formed with a passage 41 for inserting an optical fiber. The lens 30 has a first inclined surface 31 at one end of the second hole 122, the ferrule 40 has a second inclined surface 42 at one end of the second hole 122, and the first inclined surface 31 and the second inclined surface 42 are arranged in parallel. I.e. the first 31 and second 42 inclined planes have the same inclination angle. In an embodiment, an included angle between the first inclined surface 31 and the inner wall of the second hole 122 is 82 °, that is, an inclined angle between the first inclined surface 31 and the vertical direction is 8 °, which facilitates optical path coupling, and improves transmission efficiency and corresponding optical power. It is understood that the included angle between the first inclined surface 31 and the inner wall of the second hole 122 is not limited to the above definition, and may be adjusted correspondingly according to the requirement, such as 80 °, 81 °, 83 °, 84 °, and so on.

In one embodiment, the adjustment bar 50 is adhered to the lens 30 for ensuring sufficient pulling force effect after the glue is cured, and can bear the weight of the lens 30 and drive the lens 30 to move. For example, the lens 30 is moved along the extending direction of the adjustment groove 11, so that the lens 30 is close to or away from the ferrule 40, and the adjustment of the distance between the lens 30 and the ferrule 40 is realized.

In one embodiment, the width of the adjustment groove 11 is larger than the radius of the adjustment rod 50, so that the adjustment rod 50 rotates in the adjustment groove 11 along the circumferential direction of the first fixing sleeve 10, thereby achieving the angle adjustment of the lens 30 and the ferrule 40.

In one embodiment, the radius of the adjustment rod 50 is 0.3 mm.

When the refractive index of the lens 30 is changed by replacing a different lens 30, the distance and angle between the lens 30 and the ferrule 40 are correspondingly changed by adjusting the rod 50 to meet the transmitted optical power requirement.

In an embodiment, the fixing block is a cured glue, after the positional relationship between the lens 30 and the ferrule 40 is adjusted, the glue is injected into the adjusting groove 11, the position of the lens 30 in the first fixing sleeve 10 is fixed, the adjusting rod 50 is pulled out of the adjusting groove 11 after the glue is cured, and the glue is injected again to plug the hole at the adjusting rod 50, so as to reduce the volume of the optical fiber collimator 100 and achieve miniaturization.

In another embodiment, the fixing block is provided with a through hole for the adjusting rod 50 to pass through, the contact surface of the fixing block and the inner wall of the adjusting groove 11 and the bottom surface are provided with adhesive layers, when the fixing block is arranged in the adjusting groove 11, the fixing block is adhered to the circumferential surface of the lens 30 and fixed in the adjusting groove 11 through the adhesive layers, and the part of the adjusting rod 50 protruding out of the fixing block is cut off, so as to reduce the volume of the optical fiber collimator 100 and realize miniaturization.

When the optical fiber collimator 100 is assembled, one end of the ferrule 40 is first installed in the sleeve 211, the other end of the ferrule 40 is then installed in the second hole 122 of the first fixing sleeve 10 and connected to the first fixing sleeve 10 through the connecting portion 22, the lens 30 with the adjusting rod 50 is then installed in the first hole 121 and the second hole 122 of the first fixing sleeve 10, the lens is adjusted to a proper position, and the lens 30 is fixed in the first fixing sleeve 10 through the fixing block.

Above-mentioned fiber collimator 100 is through setting up adjustment tank 11 on first fixed cover 10, can adjust the position relation of lens 30 and lock pin 40, it is convenient in the coupling between lens 30 and the lock pin 40, make the product more miniaturized and the assembling process simpler, and lens 30 and lock pin 40 locate same position, make second hole 122 lens 30 and lock pin 40's concentricity keep unanimous, avoid the influence of other factors to the concentricity, lead to the concentricity poor, influence optical signal transmission, and then promote transmission efficiency and optical power.

It should be understood by those skilled in the art that the above embodiments are only for illustrating the present application and are not to be taken as limiting the present application, and that suitable changes and modifications to the above embodiments are within the scope of the present disclosure as long as they are within the spirit and scope of the present application.

Claims

1. A fiber collimator, comprising:

a first fixing sleeve;

the second fixing sleeve is connected with the first fixing sleeve, and a sleeve is arranged in the second fixing sleeve;

a lens disposed within the first stationary sleeve;

the inserting cores are respectively arranged in the sleeve pipes of the first fixing sleeve and the second fixing sleeve and are separated from the lens;

the device is characterized in that the first fixing sleeve is provided with an adjusting groove communicated with the inside of the first fixing sleeve along the axis direction of the first fixing sleeve;

the fiber collimator further includes:

the adjusting rod is arranged in the adjusting groove and connected with the lens, the position of the adjusting rod in the adjusting groove is adjusted, the lens is driven to move in the first fixing sleeve, and the positions of the lens and the inserting core are adjusted; and

and the fixing block is arranged in the adjusting groove and used for fixing the position of the lens in the first fixing sleeve.

2. The fiber collimator of claim 1, wherein the first fixed sleeve is provided with a stepped through hole, and the lens and the ferrule are disposed in the through hole having the same radius.

3. The fiber collimator of claim 2, wherein the stepped through hole includes a first hole, a second hole and a third hole, the lens is disposed in the first hole and the second hole, one end of the ferrule is disposed in the sleeve, the other end of the ferrule protrudes from the sleeve and is disposed in the second hole, and the second fixing sleeve is disposed in the third hole to connect with the first fixing sleeve.

4. The fiber collimator of claim 3, wherein the second retaining sleeve is provided with a fourth hole, the sleeve being provided in the fourth hole, the fourth hole having a radius larger than a radius of the second hole.

5. The fiber collimator of claim 3, wherein an outer diameter of the ferrule is larger than a radius of the first bore.

6. The fiber collimator of claim 3 wherein an end of the second fixture sleeve is provided with a connecting portion having an outer diameter equal to a radius of the third bore, the second fixture sleeve having an outer diameter greater than the radius of the third bore.

7. The fiber collimator of claim 3, wherein the lens has a first inclined surface at an end of the second hole, and the ferrule has a second inclined surface at an end of the second hole, the first inclined surface being parallel to the second inclined surface.

8. The fiber optic collimator of claim 7, wherein the first angled face is angled 82 ° from an inner wall of the second bore.

9. The fiber collimator of claim 3, wherein the first, second and third holes have radii that are arranged from small to large.

10. The fiber collimator of claim 1, wherein the width of the adjustment slot is larger than the radius of the adjustment rod to allow the adjustment rod to rotate in the circumferential direction of the first fixture sleeve.