CN219105210U

CN219105210U - Optical fiber collimator

Info

Publication number: CN219105210U
Application number: CN202223564281.2U
Authority: CN
Inventors: 周永军; 唐育青
Original assignee: Oft Optoelectronic Tech Co ltd
Current assignee: Oft Optoelectronic Tech Co ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-05-30
Anticipated expiration: 2032-12-30

Abstract

The utility model discloses an optical fiber collimator which comprises an optical fiber, a first shell, a second shell and a lens, wherein the optical fiber is embedded in the second shell, the second shell is connected with the tail part of the lens, the head part of the lens is replaceable, the head part of the lens is convex, and an assembly formed by the optical fiber, the second shell and the lens is arranged in the first shell; compared with the prior art, the utility model can change the angle of refraction of the light beam by changing the self-focusing lens with different curvature radius and self-length of the lens, thereby adapting to different working requirements; meanwhile, the optical fiber is arranged in the capillary, the tail of the capillary is processed to enable the tail of the capillary to form a preset angle with the horizontal line, and the tail of the lens also forms a preset angle with the horizontal line, so that the connecting area of the optical fiber and the horizontal line is increased, and the optical fiber can be connected more stably.

Description

Optical fiber collimator

Technical Field

The utility model relates to an optical fiber collimator.

Background

The fiber collimator is formed by precisely positioning a tail fiber and a self-focusing lens. It can convert the transmitted light in the fiber into collimated light (parallel light) or couple the external parallel (nearly parallel) light into a single mode fiber.

Fiber collimators are classified into two types, one being a collimator that can be directly contacted with bare fibers. This is the cheapest and simple method, but such collimators are typically permanently attached to the optical fibers.

Another fiber collimator has a mechanical cross section with the optical connector, for example, of the FC or SMA type; are not typically used for bare optical fibers. Such collimators may be conveniently mounted on or removed from spliced optical fibres.

The same device may also launch collimated light into the fiber, or for inter-fiber coupling: the light exiting the first fiber is first collimated using a first collimator and then the collimated beam is focused into a second fiber using another collimator. In general, a fiber optic connector can be considered as a natural cross-section between fiber optic and free space optics.

Another application is to combine a back mirror with an additional optical element. For example, a faraday rotator can be inserted therein to obtain a fiber faraday mirror, or a quarter-wave plate can be inserted therein to obtain a half-wave plate mirror. In some other cases, a fiber optic filter or a saturated absorber may be employed.

The fiber collimator can convert the light beam with larger divergence angle (small beam waist) into the light beam with smaller divergence angle (large beam waist) through the lens, so that the light beam is coupled into other optical devices with lower loss,

the optical fiber collimator has different specifications, the optical fiber collimator changes the divergent light beam into collimated light through the lens, the lens with different curvature radius can enable the light beam to deviate in different angles, the optical fiber collimator with different curvature radius and the lens with the same length can enable the light to be transmitted to lasers at different positions according to actual needs, but when meeting different positions or distance requirements, the different optical fiber collimators need to be replaced, so that the collimators with different specifications are easy to be mixed, the working efficiency is reduced, and the volumes of the optical fiber collimators are larger.

The utility model comprises the following steps:

the utility model aims to solve the defects in the prior art and provides an optical fiber collimator.

The optical fiber collimator comprises an optical fiber, a first shell, a second shell and a lens, wherein the optical fiber is embedded in the second shell, the second shell is connected with the tail part of the lens, the head part of the lens is replaceable, the head part of the lens is convex, and an assembly formed by the optical fiber, the second shell and the lens is arranged in the first shell.

The working principle of the utility model is as follows: the angle of refraction of the light beam can be changed by changing the self-focusing lens with different curvature radiuses and the self-length of the lens, so that the device is suitable for different working requirements.

In order to better fix the internal fittings and observe the connection condition of the internal fittings, the first housing is a glass tube.

In order to better fix the optical fiber, the second housing is a capillary tube.

The self-focusing lens material can refract light transmitted along the axial direction and gradually reduce the refractive index distribution along the radial direction, so that emergent rays are smoothly and continuously converged to one point, and the lens is a self-focusing lens.

In order to make the contact area of the capillary tube and the lens larger and not affect the characteristics of the capillary tube and the lens, the joint of the second housing and the lens is the tail part of the second housing, the plane of the tail part of the second housing forms a preset included angle with the horizontal line, the plane of the tail part of the lens forms a preset included angle with the horizontal line, the tail part of the second housing is matched with the plane of the tail part of the lens, and the cross section of the assembly of the second housing and the lens is rectangular.

In order to facilitate the connection between the capillary tube and the lens, the first housing and the lens are connected by glue.

The beneficial effects are that:

compared with the prior art, the utility model can change the angle of refraction of the light beam by changing the self-focusing lens with different curvature radiuses, thereby adapting to different working requirements; meanwhile, the optical fiber is arranged in the capillary, the tail of the capillary is processed to enable the tail of the capillary to form a preset angle with the horizontal line, and the tail of the lens also forms a preset angle with the horizontal line, so that the connecting area of the optical fiber and the horizontal line is increased, and the optical fiber can be connected more stably.

Drawings

FIG. 1 is a schematic diagram of a fiber optic collimator;

in the figure, 1, optical fiber, 2, capillary, 3, glass tube, 4 and lens.

Detailed Description

The present utility model will be further described in detail with reference to the following examples and drawings for the purpose of enhancing the understanding of the present utility model, which examples are provided for the purpose of illustrating the present utility model only and are not to be construed as limiting the scope of the present utility model.

As shown in fig. 1, an optical fiber 1, a capillary 2, a glass tube 3, and a lens 4;

the collimator for the optical fiber 1 comprises the optical fiber 1, a first shell, a second shell and a lens 4, wherein the optical fiber 1 is embedded in the second shell, the second shell is connected with the tail part of the lens 4, the head part of the lens 4 is replaceable, the head part of the lens 4 is convex, and an assembly formed by the optical fiber 1, the second shell and the lens 4 is arranged in the first shell.

In this embodiment, the first housing is a glass tube 3.

In this embodiment, the second housing is a capillary tube 2.

In this embodiment, the lens 4 is a self-focusing lens 4.

According to this embodiment, the connection between the second housing and the lens 4 is a tail portion of the second housing, a plane of the tail portion of the second housing forms a predetermined angle with a horizontal line, a plane of the tail portion of the lens 4 forms a predetermined angle with the horizontal line, the tail portion of the second housing is matched with the plane of the tail portion of the lens 4, and a cross section of the assembly of the second housing and the lens 4 is rectangular.

In this embodiment, the first housing and the lens 4 are connected by glue.

The using method comprises the following steps: the angle of refraction of the light beam can be changed by changing the lenses 4 with different curvature radiuses, so that the device is suitable for different working requirements; meanwhile, the optical fiber 1 is arranged in the capillary 2, the tail of the capillary 2 is processed to form a preset angle with the horizontal line, and the tail of the lens 4 also forms a preset angle with the horizontal line, so that the connecting area of the two parts is increased, and the two parts can be connected more stably.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims

1. The utility model provides an optical fiber collimator, includes the main part, its characterized in that, the main part includes optic fibre, first shell, second shell and lens, optic fibre inlay in the second shell, the second shell link to each other with the afterbody of lens, the head of lens be removable, the head of lens is the convex surface, optic fibre, second shell and lens constitute the sub-assembly setting in first shell.

2. The fiber collimator of claim 1, wherein the first housing is a glass tube.

3. The fiber collimator of claim 1, wherein the second housing is a capillary tube.

4. The fiber collimator of claim 1, wherein the lens is a self-focusing lens.

5. The optical fiber collimator of claim 1, wherein the junction between the second housing and the lens is a tail of the second housing, a plane of the tail of the second housing forms a predetermined angle with a horizontal line, a plane of the tail of the lens forms a predetermined angle with the horizontal line, the tail of the second housing matches a plane of the tail of the lens, and a cross section of the second housing-lens assembly is rectangular.

6. The fiber collimator of claim 1, wherein the first housing and the lens are connected by glue.