CN212647174U

CN212647174U - Quartz column for outputting optical fiber laser

Info

Publication number: CN212647174U
Application number: CN202021215638.4U
Authority: CN
Inventors: 黄榜才; 陈志刚
Original assignee: Suzhou Kaige Laser Technology Development Co ltd
Current assignee: Suzhou Kaige Laser Technology Development Co ltd
Priority date: 2020-06-28
Filing date: 2020-06-28
Publication date: 2021-03-02
Anticipated expiration: 2030-06-28

Abstract

The utility model discloses a quartz post for fiber laser output, include: a fusion post for fusion splicing with an output pigtail of the fiber laser, the fusion post comprising a fusion endface; the output column is used for outputting the laser of the optical fiber laser, and comprises an output end face and a groove surrounded by the output end face; the welding column is connected with the output column, the axis of the output tail fiber is coaxial with the axis of the welding column and the axis of the output column respectively, and laser in the output tail fiber enters from the welding end face and sequentially passes through the welding column and the output column and then is output from the output end face. Compared with the prior art, the utility model provides a quartz post for fiber laser output just can realize fiber laser's annular facula output through the structure that changes quartz post, easy operation, low cost improve fiber laser's machining efficiency simultaneously by a wide margin.

Description

Quartz column for outputting optical fiber laser

Technical Field

The utility model relates to a quartz post for fiber laser output belongs to the passive optical device field.

Background

When the energy transmission optical fiber is used for transmitting high-power laser, the damage problem of the emergent end face of the energy transmission optical fiber is a main factor for limiting the high power transmission of the optical fiber, and the scheme for solving the damage of the end face of the optical fiber is that a quartz column is added in front of the end face of the optical fiber to be used as an end cap, so that the damage of the high-power laser to the end face of the optical fiber can be effectively avoided. The quartz column is used as a beam expander of the output tail fiber of the high-power fiber laser, is not only an output waveguide, but also the beam expander and plays an important role, so that the quartz column is very commonly applied to the high-power fiber laser.

At present, the most commonly used quartz columns of the optical fiber end caps include cylindrical quartz columns and conical quartz columns, wherein the cylindrical quartz column is proposed by Shenzhen Chuanxin laser technology Limited (application No. 201310629400.4, application publication No. CN 103676051A), and the cylindrical quartz column is proposed by Shenzhen Xinhan laser technology Limited (application No. 201810775769.9, application publication No. CN 108761646A). In addition, there are some optical fiber end caps that use different quartz column designs for different purposes, such as the stepped quartz column proposed by the limited liability company of fiber laser technology in the martial arts department (application No. 201320599843.9, No. CN 203480079U) for solving the problem of light feedback, and the truncated cone quartz column with collimation function proposed by the institute of weapons and equipments in china (application No. 201710346018.0).

The quartz column designs described above are all circular spot outputs, with energy distribution mainly concentrated in the center of the spot, but in some special cases, there is a need for an annular beam, for example, in the fields of laser optics, optical information processing, particle waveguides, isotope separation, microelectronics and materials science, biotechnology, medicine, and atomics, molecular science.

There are also many methods for changing from a circular spot to a ring-shaped spot, such as in patent CN206952364U, where the circular spot is transformed into a ring shape by various lenses after being output. However, this method is complicated, costly and inconvenient to operate.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the purpose is: overcome the not enough of prior art existence, solve the problem that exists among the prior art, provide a quartz post for fiber laser output, just can realize fiber laser's annular facula output through the structure that changes quartz post, easy operation, low cost improve fiber laser's machining efficiency simultaneously by a wide margin.

The technical scheme of the utility model is that: a quartz column for fiber laser output, comprising:

the fusion post is used for fusing with the output tail fiber of the optical fiber laser, and comprises a fusion end face;

the output column is used for outputting the laser of the optical fiber laser, and comprises an output end face and a groove surrounded by the output end face;

the welding column is connected with the output column, the axis of the output tail fiber is coaxial with the axis of the welding column and the axis of the output column respectively, and laser in the output tail fiber enters from the welding end face and sequentially passes through the welding column and the output column and then is output from the output end face.

Furthermore, the output end face is annular, the groove is inwards recessed from the inner ring of the output end face along the axial direction of the output column, and the inner diameter of the groove decreases progressively from the output end face.

Further, the groove is conical or truncated cone-shaped with the top facing the welding column, and the axis of the groove is coaxial with the axis of the output column.

Further, the welding column is cylindrical or in a circular truncated cone shape with the top facing the output tail fiber.

Further, the length of the welding column is less than or equal to 3mm, and the diameter of the welding column is 1 mm-2.5 mm.

Further, the output column is cylindrical or truncated cone with the top facing the fusion column.

Further, the length of the output column is less than or equal to 17mm, the diameter of the output column is less than or equal to 10mm, and the minimum diameter of the output column is greater than or equal to the maximum diameter of the fusion column.

Further, the diameter of the outer ring of the circular output end face of the output column is smaller than or equal to 10mm, the diameter of the inner ring of the circular output end face of the output column is smaller than or equal to 4mm, the depth of the groove is smaller than or equal to 6mm, and the depth of the groove is smaller than or equal to the length of the groove of the output column.

Further, the welding column and the output column are pure quartz columns, and the refractive index of the pure quartz is 1.457.

The utility model has the advantages that:

1. the utility model discloses a quartz post for fiber laser output through simple structure, realizes fiber laser's annular facula output, easy operation, low cost, improves fiber laser's machining efficiency simultaneously by a wide margin.

Drawings

FIG. 1 is a cross-sectional view of a first embodiment of a quartz column for fiber laser output according to the present invention;

FIG. 2 is a cross-sectional view of a second embodiment of the quartz column for fiber laser output of the present invention;

fig. 3 is a schematic diagram of the output end face of the quartz column for fiber laser output according to the present invention.

Wherein, 10-a welding column; 11-welding end faces; 20-an output column; 21-output end face; 211-inner ring of output end face, 212-outer ring of output end face, 22-groove.

Detailed Description

The technical solution of the present invention is described in detail below with reference to the accompanying drawings 1-2 and embodiments, wherein: 10. welding the column; 11. welding the end faces; 20. an output column; 21. an output end face; 211-inner ring of output end face, 212-outer ring of output end face, 22 and groove.

As shown in fig. 1-2, the present invention discloses a quartz column for fiber laser output, which is particularly suitable for high power fiber lasers, comprising a welding column 10 and an output column 20. The fusion post 10 is for fusion splicing to the output pigtail of a fibre laser and comprises a fusion splicing end face 11. The output column 20 is used for outputting laser of the fiber laser, and includes an output end face 21 and a groove 22 surrounded by the output end face, the output end face 21 is circular, and the circular rings may be concentric circular rings or non-concentric circular rings. Preferably, the output end surface is a concentric circular ring output end surface, as shown in fig. 3.

The welding column 10 is connected with the output column 20, the axis of the output tail fiber is respectively on the same straight line with the axis of the welding column 10 and the axis of the output column 20, and the laser in the output tail fiber enters from the welding end face 11 of the welding column 10 and sequentially passes through the welding column and the output column and then is output from the annular output end face 21 of the output column 20, so that the annular light spot output of the optical fiber laser is realized, the operation is simple, the cost is low, and meanwhile, the processing efficiency of the optical fiber laser is greatly improved.

In one embodiment, the grooves are recessed inwards from the inner ring of the output end surface along the axial direction of the output column, and the inner diameter of the grooves decreases from the output end surface to the inner diameter. The welding column 10 is cylindrical or truncated cone-shaped with the top facing the output tail fiber, the length h1 of the welding column 10 is less than 3mm, and the d1 is 1 mm-2.5 mm.

In another embodiment, the output column 20 may be a cylinder or a circular truncated cone with the top facing the welding column 10, the length h2 of the output column 20 is less than 17mm, the diameter d2 is less than 10mm, and the minimum diameter of the output column 20 (such as the top diameter of the circular truncated cone) is greater than or equal to the maximum diameter of the welding column (such as the bottom diameter of the circular truncated cone). At this time, the diameter d2 of the annular output end face outer ring 212 of the output column 20 is 10mm, the diameter d3 of the output end face inner ring 211 is 4mm, the depth h3 of the groove 22 is 6mm, and the depth h3 of the groove is 2.

In a preferred embodiment, the groove 22 is conical or truncated cone shaped with the top facing the weld column 10, and the axis of the groove 22 is collinear with the axis of the output column 20.

In one embodiment, the fusion column and the output column are pure quartz cylinders, the refractive index of the pure quartz being 1.457.

It should be noted that the quartz column for fiber laser output disclosed in the present invention may also be a cylinder (such as a truncated cone or a cylinder), but includes two parts, i.e., a welding column and an output column. The shapes of the welding column and the output column are not limited to the shapes described above.

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying the present invention are further described below. The present invention is not limited to the embodiments listed.

Example one

Referring to fig. 1, the quartz column for fiber laser output includes a cylindrical fusion column 10 and a cylindrical output column 20, the groove 22 is conical, the length h1 of the fusion column 10 is 3mm, and the diameter d1 is 2.5 mm. The length h2 of the output column 20 is 17mm and the diameter d2 is 10 mm. The height h3 of the conical recess is 6mm, and the opening diameter (base diameter) d3 is 4 mm. The fusion column 10 and output column 20 are pure quartz with a refractive index of 1.457.

Example two

Referring to fig. 2, the quartz column for fiber laser output includes a truncated cone-shaped fusion column 10 and a cylindrical output column 20, the groove 22 is truncated cone-shaped, the length h1 of the fusion column 10 is 3mm, the diameter of the top surface is 2.5mm, and the diameter of the bottom surface is 10 mm. The length h2 of the output column 20 is 17mm and the diameter d2 is 10 mm. The height h3 of the truncated cone-shaped groove is 6mm, and the diameter d3 of the bottom surface is 4 mm. The fusion column 10 and output column 20 are pure quartz with a refractive index of 1.457.

The above, only be two concrete application examples of the utility model, nevertheless the utility model discloses a scope of protection is not limited to this, and all adopt the design of the utility model, under the prerequisite that does not deviate from the utility model discloses the design, can also make a plurality of deformations and improvements to and any familiar with technical person in this technical field is in the technical scope of the utility model discloses a change or the replacement that can easily think all should be covered within the scope of protection of the utility model.

Claims

1. A quartz column for fiber laser output, comprising:

a fusion post (10) for fusion to an output pigtail of the fibre laser, the fusion post comprising a fusion end face (11);

an output column (20) for outputting laser light of the fiber laser, the output column including an output end face (21) and a groove (22) surrounded by the output end face;

the welding column (10) is connected with the output column (20), the axis of the output tail fiber is coaxial with the axis of the welding column and the axis of the output column respectively, and laser in the output tail fiber enters from the welding end face and sequentially passes through the welding column and the output column and then is output from the output end face.

2. The quartz column for fiber laser output of claim 1, wherein: the output end face (21) is annular, the groove (22) is inwards sunken from the inner ring of the output end face along the axial direction of the output column, and the inner diameter of the groove decreases progressively from the output end face.

3. The quartz column for fiber laser output of claim 2, wherein: the groove (22) is conical or truncated cone-shaped with the top facing the welding column, and the axis of the groove (22) is coaxial with the axis of the output column.

4. The quartz column for fiber laser output of claim 1, wherein: the welding column (10) is cylindrical or in a circular truncated cone shape with the top facing the output tail fiber.

5. The quartz column for fiber laser output of claim 1, wherein: the length of the welding column (10) is less than or equal to 3mm, and the diameter of the welding column is 1 mm-2.5 mm.

6. The quartz column for fiber laser output of claim 1, wherein: the output column (20) is cylindrical or truncated cone-shaped with the top facing the fusion column.

7. The quartz column for fiber laser output of claim 1, wherein: the length of the output column (20) is less than or equal to 17mm, the diameter of the output column (20) is less than or equal to 10mm, and the minimum diameter of the output column is greater than or equal to the maximum diameter of the fusion column.

8. A quartz column for fiber laser output as claimed in claim 3, wherein: the diameter of an outer ring (212) of the circular output end face of the output column (20) is smaller than or equal to 10mm, the diameter of an inner ring (211) of the circular output end face of the output column (20) is smaller than or equal to 4mm, the depth of the groove (22) is smaller than or equal to 6mm, and the depth of the groove (22) is smaller than or equal to the length of the output column (20).

9. The quartz column for fiber laser output of claim 1, wherein: the welding column (10) and the output column (20) are pure quartz columns, and the refractive index of the pure quartz is 1.457.