CN110556709A

CN110556709A - Laser device

Info

Publication number: CN110556709A
Application number: CN201910866928.0A
Authority: CN
Inventors: 周少丰; 刘鹏; 李日豪
Original assignee: Shenzhen Star Han Laser Technology Co Ltd
Current assignee: Shenzhen Star Han Laser Technology Co Ltd; Shenzhen Xinghan Laser Technology Co Ltd
Priority date: 2019-09-12
Filing date: 2019-09-12
Publication date: 2019-12-10
Also published as: WO2021046972A1

Abstract

the embodiment of the invention relates to the technical field of optics, and discloses a laser which comprises a COS array, a collimating lens array, a reflector array and a shell, wherein when monochromatic laser emitted from the COS array is emitted through the collimating lens array and the reflector array, part of light beams are transmitted to a non-planar shell wall of the shell through the reflector array, and because the non-planar shell wall of the shell and the intersection of the light emitted by the reflector array are arranged at non-ninety degrees with respect to an optical axis, the transmitted light emitted by the reflector array cannot be reflected along an original emergent light path, so that the chip in the COS array is prevented from being damaged by the reflected light.

Description

Laser device

Technical Field

The embodiment of the invention relates to the technical field of optics, in particular to a laser.

Background

The semiconductor laser chip is a core element of the semiconductor laser and plays a decisive role in the quality of the semiconductor laser. With the development of semiconductor laser chips, the power of a single laser chip is higher and higher, and the energy of the reflected light of each interface in the optical path is not neglected.

The reflectivity of a reflector adopted in the high-power optical fiber coupling semiconductor laser is usually 99%, 1% of light always penetrates through the reflector and hits a metal shell wall, and because the metal shell wall has high reflectivity and is a plane shell wall, most of light beams penetrating through the reflector and reaching the metal shell wall are reflected back to the inside of a COS chip according to the original way, so that the chip is damaged or dead.

Disclosure of Invention

in view of the above-mentioned drawbacks of the prior art, an object of the embodiments of the present invention is to provide a laser capable of avoiding die-down caused by reflecting the outgoing light back to the COS array.

the purpose of the embodiment of the invention is realized by the following technical scheme:

In order to solve the above technical problem, an embodiment of the present invention provides a laser, including:

the COS array is used for emitting monochromatic laser;

The collimating lens array is arranged in the light-emitting direction of the COS array;

the reflector array is arranged in the light emergent direction of the collimating lens array at a preset angle;

the shell comprises a non-planar shell wall arranged on one side of the reflector array far away from the collimating lens array, and the non-planar shell wall is arranged at a position, at the intersection of the non-planar shell wall and light emitted by the reflector array, of non-ninety degrees with respect to an optical axis.

In some embodiments, the COS array includes at least one COS element for emitting at least one monochromatic laser light and at least one heat sink on which one of the COS elements is correspondingly mounted.

In some embodiments, the collimating lens array includes a fast axis collimating lens array and a slow axis collimating lens array, the fast axis collimating lens array is disposed in the light-emitting direction of the COS array, and the slow axis collimating lens array is disposed in the light-emitting direction of the fast axis collimating lens array.

In some embodiments, the fast axis collimating lens array comprises at least one fast axis collimating lens, the slow axis collimating lens array comprises at least one slow axis collimating lens, and the number of COS elements, the fast axis collimating lenses, and the slow axis collimating lenses is the same.

In some embodiments, the mirror array comprises at least one mirror, and one of the mirrors is disposed in the light-emitting direction of one of the slow-axis collimating lenses.

in some embodiments, the housing further comprises a stepped structure wall for housing the COS array, the collimating lens array and the mirror array, the stepped structure wall integrally connected to the non-planar wall, the stepped structure wall comprising at least one step surface, each step surface for housing a set of the COS element, the fast axis collimating lens, the slow axis collimating lens and the mirror disposed on the same optical axis.

In some embodiments, the non-planar housing wall is a circular structure, the non-planar housing wall comprises sub-housing walls integrally connected end to end, a sub-housing wall is integrally connected to a step surface, and each sub-housing wall comprises at least one semi-circular structure protruding toward the corresponding reflector.

in some embodiments, the non-planar housing wall is a sawtooth structure, the non-planar housing wall comprises sub-housing walls integrally connected end to end, a sub-housing wall is integrally connected to a step surface, and each sub-housing wall comprises at least one sawtooth structure protruding towards the corresponding reflector.

in some embodiments, the laser further comprises a focusing lens disposed in the light exit direction of the mirror array.

In some embodiments, the laser further comprises an optical fiber, an end face of the optical fiber being disposed at a focal point in a light exit direction of the focusing lens.

Compared with the prior art, the invention has the beneficial effects that: different from the prior art, the embodiment of the invention provides a laser, which comprises a COS array, a collimating lens array, a mirror array and a housing, wherein when monochromatic laser light emitted from the COS array passes through the collimating lens array and the mirror array, part of the light beam is transmitted to a non-planar shell wall of the housing through the mirror array, and because the non-planar shell wall of the housing is intersected with the light emitted by the mirror array, the non-planar shell wall and an optical axis are arranged at a non-ninety degree angle, the transmitted light emitted by the mirror array cannot be reflected along an original emergent light path, so that the chip in the COS array is prevented from being damaged by the reflected light.

Drawings

one or more embodiments are illustrated by the accompanying figures in the drawings that correspond thereto and are not to be construed as limiting the embodiments, wherein elements/modules and steps having the same reference numerals are represented by like elements/modules and steps, unless otherwise specified, and the drawings are not to scale.

Fig. 1 is a schematic diagram of an overall structure of a laser provided in an embodiment of the present invention;

FIG. 2 is an optical path diagram of an exit beam of a COS element of the laser of FIG. 1;

Fig. 3 is a schematic diagram of an overall structure of another laser provided in the embodiment of the present invention.

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for descriptive purposes only. To facilitate the connection structure definition, the present invention performs the position definition of the components with reference to the light emitting direction of the laser, for example, the collimating lens array 20 is in the light emitting direction/"front" direction of the COS array 10.

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 invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

in addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Specifically, the embodiments of the present invention will be further explained below with reference to the drawings.

Referring to fig. 1, an overall structural schematic diagram of a laser provided in an embodiment of the present invention is shown, where the laser includes: the laser comprises a COS array 10, a collimating lens array 20, a reflector array 30 and a shell 40, wherein the COS array 10 emits at least one monochromatic laser which is emitted out after passing through the collimating lens array 20 and the reflector array 30,

Most of the laser beams are reflected and emitted by the reflector array 30, a small part of the laser beams are transmitted and emitted by the reflector array 30 and hit the housing 40, and the housing 40 reflects the upper part of the laser beams. The majority of the laser beams accounts for about ninety nine percent of all laser beams incident on the mirror array 30, and the minority of the laser beams accounts for about one percent of all laser beams incident on the mirror array 30. The housing 40 in the laser provided by the embodiment of the present invention can prevent the small laser beam from returning along the original path.

The COS array 10 is used to emit monochromatic laser light. The COS array 10 comprises at least one COS element 11 and at least one heat sink 12, wherein the at least one COS element 10 is used for emitting at least one monochromatic laser, and one COS element 10 is correspondingly arranged on one heat sink 12.

In the embodiment shown in fig. 1, the COS array 10 includes 5 COS elements 11 and corresponding 5 heat sinks 12, each COS element 11 mounted on a corresponding heat sink 12. Each COS element 11 is provided therein with a laser chip capable of emitting monochromatic laser light, and 5 COS elements 11 may emit laser light of the same wavelength, may also emit laser light of different wavelengths, and may also partially emit laser light of the same wavelength, specifically, the type of the laser chip may be selected according to actual needs to control the wavelength of the emitted laser light.

The collimating lens array 20 is disposed in the light-emitting direction of the COS array 10 and coincides with the optical axis of the COS array 10. The collimating lens array 20 comprises a fast axis collimating lens array 21 and a slow axis collimating lens array 22, the fast axis collimating lens array 21 is arranged in the light-emitting direction of the COS array 10, and the slow axis collimating lens array 22 is arranged in the light-emitting direction of the fast axis collimating lens array 21. The fast axis collimating lens array 21 includes at least one fast axis collimating lens 210, the slow axis collimating lens array 22 includes at least one slow axis collimating lens 220, and the number of the COS elements 11, the fast axis collimating lenses 210, and the slow axis collimating lenses 220 is the same. The fast axis collimating lens and the slow axis collimating lens are both cylindrical lenses.

in the embodiment shown in fig. 1, the fast axis collimating lens array 21 includes 5 fast axis collimating lenses 210, the slow axis collimating lens array 22 includes 5 slow axis collimating lenses 220, the number of the fast axis collimating lenses 210, the number of the slow axis collimating lenses 220 and the number of the COS elements 11 are the same, and light emitted from one COS element 11 is collimated in the fast axis direction by the fast axis collimating lenses 210 on the same optical path, and is collimated in the slow axis direction by the slow axis collimating lenses 220 on the same optical path, and then is emitted as a parallel light beam.

the reflector array 30 is disposed at a predetermined angle in the light-emitting direction of the collimating lens array 20. The reflector array 30 includes at least one reflector 31, and one reflector 31 is correspondingly disposed in the light-emitting direction of one slow-axis collimating lens. The number of the mirrors 31 is the same as the number of the COS elements 11. The preset angle may be set according to the light emitting direction, and it can be understood that, for the setting of the preset angle set by the at least one reflector 31, it is required to ensure that the light emitting directions of the light beams reflected by the at least one reflector 31 are the same.

In the embodiment shown in fig. 1, the mirror array 30 includes 5 mirrors 31, and after a light beam emitted from one slow axis collimating lens 220 passes through the mirror 31 on the same optical path, most of the light is reflected and emitted, and a small part of the light is transmitted and emitted, and the transmitted and emitted light is incident on the housing 40.

The housing 40 includes a non-planar wall 41 disposed on a side of the mirror array 30 away from the collimator lens array 20, and the non-planar wall 41 is disposed at a non-ninety degree angle to an optical axis at an intersection of the non-planar wall 41 and light emitted from the mirror array 30. The housing 40 is typically made of metal. The optical axis refers to the optical axis of the light beam emitted by the COS array.

The housing 40 further includes a stepped structure wall 42 for placing the COS array 10, the collimating lens array 20 and the mirror array 30, the stepped structure wall 42 is integrally connected to the non-planar wall 41, and the stepped structure wall 42 includes at least one stepped surface, each stepped surface is used for placing a set of the COS element 11, the fast axis collimating lens 210, the slow axis collimating lens 220 and the mirror 31 on the same optical axis.

In the embodiment shown in fig. 1, the dotted line is a separation line of each step surface, and two sides of each dotted line are two step surfaces with different heights. It should be noted that, in order to enable all the light beams reflected by the reflecting mirrors 31 to exit onto the focusing lens 50 without being blocked, the height of the step surface is gradually reduced from left to right in fig. 1 to avoid the blocking.

further, in the embodiment shown in fig. 1, the non-planar shell wall 41 has a circular structure, the non-planar shell wall 41 includes sub-shell walls integrally connected end to end, one of the sub-shell walls is integrally connected to one of the step surfaces, and each of the sub-shell walls has a semicircular structure protruding toward the corresponding reflector 31.

Referring to fig. 2, it is shown that, after the light beam S emitted after being transmitted by the reflector 31 hits the circular structure of the non-planar housing wall 41, the reflected light beam P is reflected to different directions, and since the optical axis of the non-planar housing wall 41 and the COS element 11 is disposed at an intersection of the non-planar housing wall 41 and the light emitted by the reflector 31 at an angle other than ninety degrees, the light beam reflected by the non-planar housing wall 41 does not return to the COS element of the original optical path. And because each group of COS element 11, fast axis collimating lens 210, slow axis collimating lens 220 and reflector 31 on the same optical path/axis are disposed on step surfaces of different heights, the light beam reflected by the non-planar housing wall 41 will not enter the COS element 11 on other optical paths, and the laser chip will not be damaged.

The embodiment of the invention provides a laser, which comprises a COS array 10, a collimating lens array 20, a reflector array 30 and a shell 40, wherein when monochromatic laser emitted from the COS array 10 passes through the collimating lens array 20 and the reflector array 30 to be emitted, part of light beams are transmitted to a non-planar shell wall 41 of the shell 40 through the reflector array 30, and because the non-planar shell wall 41 of the shell 40 is intersected with the light emitted by the reflector array 30, the non-planar shell wall 41 is arranged at a non-ninety degree angle with an optical axis, the transmitted light emitted by the reflector array 30 cannot be reflected along an original emergent light path, and the chip in the COS array is prevented from being damaged by return light.

In some embodiments, continuing to refer to fig. 1, the laser further includes a focusing lens 50 and an optical fiber 60. The focusing lens 50 is disposed in the light emitting direction of the reflector array 30, and is configured to emit the parallel light reflected by the reflector array 30. The end face of the optical fiber 60 is disposed at the focal point of the light exit direction of the focusing lens 50.

An alternative is also provided in the embodiment of the present invention, please refer to fig. 3, which is a schematic diagram of an overall structure of another laser provided in the embodiment of the present invention, and the difference between the laser and the laser shown in fig. 1 is that the non-planar housing wall 41 has a saw-tooth structure, the non-planar housing wall 41 includes sub-housing walls integrally connected end to end, one sub-housing wall is integrally connected with one step surface, and each sub-housing wall has a saw-tooth structure including at least one protrusion protruding toward the corresponding reflector 31. Since the non-planar housing wall 41 in fig. 3 is also disposed at a position where the non-planar housing wall 41 intersects with the light emitted from the mirror array 30, the non-planar housing wall 41 is also disposed at a non-ninety degree angle with respect to the optical axis, and since a step surface is disposed, it can be known that the transmitted light emitted from the mirror array 30 is also not reflected along the original exit light path, so as to prevent the chip in the COS array from being damaged by the return light.

In the embodiment of the present invention, as shown in fig. 1 and 2, the non-planar shell wall 41 is a periodic structure, that is, the non-planar shell wall 41 of the laser shown in fig. 1 is a periodic circular structure, and the non-planar shell wall 41 of the laser shown in fig. 2 is a periodic sawtooth structure. It should be noted that the non-planar shell wall 41 may also be a non-periodic structure, that is, each sub-shell wall may be a shell wall structure with different shapes and sizes, for example, the adjacent sub-shell walls may also be a circular structure and a sawtooth structure, and specifically, the arrangement may be performed according to actual needs, and is not limited by the embodiments of the present invention and the accompanying drawings.

The embodiment of the invention provides a laser which comprises a COS array, a collimating lens array, a reflector array and a shell, wherein when monochromatic laser emitted from the COS array is emitted through the collimating lens array and the reflector array, part of light beams are transmitted to a non-planar shell wall of the shell through the reflector array, the non-planar shell wall and an optical axis are arranged at a non-ninety degree angle at the intersection of the non-planar shell wall of the shell and light emitted by the reflector array, and the transmitted light emitted by the reflector array cannot be reflected along an original emergent light path, so that the chip in the COS array is prevented from being damaged by reflected light.

It should be noted that the above-described device embodiments are merely illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; within the idea of the invention, also technical features in the above embodiments or in different embodiments may be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A laser, comprising:

The COS array is used for emitting monochromatic laser;

2. The laser of claim 1,

the COS array comprises at least one COS element and at least one heat sink, wherein the COS element is used for emitting at least one monochromatic laser, and one COS element is correspondingly installed on one heat sink.

3. The laser of claim 2,

The collimating lens array comprises a fast axis collimating lens array and a slow axis collimating lens array, the fast axis collimating lens array is arranged in the light-emitting direction of the COS array, and the slow axis collimating lens array is arranged in the light-emitting direction of the fast axis collimating lens array.

4. The laser of claim 3,

The fast axis collimating lens array comprises at least one fast axis collimating lens, the slow axis collimating lens array comprises at least one slow axis collimating lens, and the COS elements, the fast axis collimating lens and the slow axis collimating lens are the same in number.

5. The laser of claim 3,

the reflector array comprises at least one reflector, and the reflector is correspondingly arranged in the light-emitting direction of the slow-axis collimating lens.

6. The laser of claim 5,

The shell further comprises a stepped structure shell wall used for placing the COS array, the collimating lens array and the reflector array, the stepped structure shell wall is integrally connected with the non-planar shell wall, the stepped surface structure shell wall comprises at least one stepped surface, and each stepped surface is used for placing a group of COS elements, the fast axis collimating lens, the slow axis collimating lens and the reflector which are arranged on the same optical axis.

7. the laser of claim 6,

the non-planar shell wall is of a circular structure, the non-planar shell wall comprises sub-shell walls which are integrally connected end to end, one sub-shell wall is correspondingly and integrally connected with one step surface, and each sub-shell wall is of a semicircular structure comprising at least one protrusion which faces to the corresponding reflector.

8. The laser of claim 6,

The non-planar shell wall is of a sawtooth structure, the non-planar shell wall comprises sub-shell walls which are integrally connected end to end, one sub-shell wall is correspondingly and integrally connected with one step surface, and each sub-shell wall is of a sawtooth structure which comprises at least one bulge facing the corresponding reflector.

9. The laser according to any one of claims 1 to 8,

The laser device further comprises a focusing lens, and the focusing lens is arranged in the light outgoing direction of the reflector array.

10. The laser of claim 9,

The laser also comprises an optical fiber, and the end face of the optical fiber is arranged on the focus of the light-emitting direction of the focusing lens.