CN111370990A - Collimation coupling system of semiconductor laser light source - Google Patents

Abstract

The application discloses semiconductor laser light source's collimation coupled system, semiconductor laser light source's collimation coupled system's light source module includes that the multiclass has different luminous area's luminescence unit, luminescence module's light-emitting direction one side is provided with the collimation module including first class collimation unit and second class collimation unit, first class collimation unit is used for the collimation luminous area to be less than the luminescence unit's of default emergent ray, second class collimation unit is used for the collimation luminous area to be greater than or equal to the luminescence unit's of default emergent ray to the realization sets up the purpose of suitable collimation unit for different luminous area's luminescence unit.

Description

Collimation coupling system of semiconductor laser light source

Technical Field

The application relates to the technical field of light path design, in particular to a collimation coupling system of a semiconductor laser light source.

Background

The light source collimation system is an important component of most light source systems and is an important structure for forming a required light beam.

In a light source system using a semiconductor laser tube as a main light source, suitable collimation systems for semiconductor laser tubes with different parameters are different, and in order to meet different application requirements, the same light source system generally includes a plurality of semiconductor laser tubes with different parameters, and it is one of the research directions of those skilled in the art how to provide suitable collimation systems for the semiconductor laser tubes with different parameters in the same light source system.

Disclosure of Invention

In order to solve the above technical problem, the present application provides a collimation coupling system of a semiconductor laser light source, which achieves the purpose of setting a proper collimation unit for light emitting units with different light emitting areas by setting different kinds of collimation units for light emitting units with different light emitting areas.

In order to achieve the technical purpose, the embodiment of the application provides the following technical scheme:

a collimating coupling system for a semiconductor laser light source, comprising:

the semiconductor laser light source module comprises a plurality of types of light-emitting units with different light-emitting areas;

the collimation module is arranged on one side of the light emitting direction of the semiconductor laser light source module and comprises a first collimation unit and a second collimation unit, wherein the first collimation unit is used for collimating emergent rays of the light emitting units with the light emitting areas smaller than a preset value, and the second collimation unit is used for collimating emergent rays of the light emitting units with the light emitting areas larger than or equal to the preset value;

and the coupling module is used for coupling the collimated emergent light rays emitted by the light emitting unit and then emitting the coupled emergent light rays.

Optionally, the method further includes:

the base is used for fixing the semiconductor laser light source module;

the light emitting unit includes: the laser light source module and the heat sink;

the heat sink is used for fixing the laser light source module on the base.

Optionally, the laser light source module is a semiconductor laser tube for emitting laser with a preset color;

the preset color laser is any one of three primary color lasers;

the heat sink is also used for transferring heat emitted by the laser light source module to the base so as to keep the working temperature of the laser light source module within a preset working range.

Optionally, a plurality of the laser light source modules are arranged on the base in an array manner.

Optionally, the first type of collimating unit is an aspheric lens collimating system or a fast-slow axis collimating system;

the second type of collimation unit is a fast-slow axis collimation system.

Optionally, the fast and slow axis collimation system includes: the first collimating element and the second collimating element are oppositely arranged;

the first collimating element is used for collimating the fast axis divergence angle of the emergent ray of the light-emitting unit;

the second collimating element is used for collimating the slow-axis divergence angle of the emergent ray of the light-emitting unit.

Optionally, the coupling module includes: a focusing lens, an optical fiber connector and a plurality of reflectors; wherein the content of the first and second substances,

the plurality of reflectors correspond to the plurality of light-emitting units one by one, and the reflectors are used for reflecting collimated emergent light of the light-emitting units corresponding to the reflectors to the focusing lens;

the focusing lens is used for focusing the emergent light rays reflected by the reflector and then transmitting the focused emergent light rays to the optical fiber connector so that the focused emergent light rays are transmitted outwards through the optical fiber interface.

Optionally, the coupling module includes: a plurality of focusing lenses, a plurality of optical fiber interfaces, and a plurality of mirrors; wherein the content of the first and second substances,

the reflectors correspond to the light-emitting units one by one, and are used for reflecting the collimated emergent light of the same type of the light-emitting units corresponding to the reflectors to the same focusing lens;

the focusing lenses are in one-to-one correspondence with the optical fiber interfaces, and are used for focusing the reflected same type of emergent light and then transmitting the same type of emergent light to the optical fiber connectors corresponding to the focusing lenses, so that the focused same type of emergent light is transmitted outwards through the optical fiber interfaces.

It can be seen from the above technical scheme that this application embodiment provides a semiconductor laser light source's collimation coupled system, semiconductor laser light source's collimation coupled system's light source module includes that the multiclass has the luminescence unit of different light-emitting area, light-emitting module's light-emitting direction one side is provided with the collimation module including first type collimation unit and second type collimation unit, first type collimation unit is used for the emergent ray of the luminescence unit that the collimation luminescence area is less than the default, second type collimation unit is used for the emergent ray of the luminescence unit that the collimation luminescence area is greater than or equal to the default to realize setting up the mesh of suitable collimation unit for the luminescence unit of different luminescence areas.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a collimating and coupling system of a semiconductor laser light source according to an embodiment of the present application;

fig. 2 is a schematic diagram illustrating an arrangement of light emitting units in a light emitting module according to an embodiment of the present disclosure;

fig. 3-5 are schematic structural diagrams of a fast-slow axis alignment system according to an embodiment of the present disclosure.

Detailed Description

As mentioned in the background, in the prior art, it is not possible to provide semiconductor laser tubes with suitable collimation systems for the same light source system, where the semiconductor laser tubes comprise a plurality of different parameters.

In particular, the inventor researches and discovers that, for a semiconductor laser tube with a small light emitting area (for example, the light emitting area is on the order of tens of square microns), the aspheric lens collimation system can generally meet the collimation requirement of the semiconductor laser tube with the small light emitting area, and for a semiconductor laser tube with a large light emitting area (for example, the light emitting area is on the order of hundreds of square microns) (for example, a red semiconductor laser tube), the aspheric lens collimation system is difficult to collimate (or compress) a light beam to a small enough range to enter a small-diameter optical fiber, which limits the combination of the semiconductor laser tubes with different light emitting areas in the small optical fiber, and is very unfavorable for the application of high-brightness RGB color light in the light source system. Therefore, for a semiconductor laser tube with a large light-emitting area, a fast-slow axis collimation system is usually adopted to collimate the emitted light, but the structure of the fast-slow axis collimation system is relatively complex, and if the fast-slow axis collimation system is also adopted for a semiconductor laser tube with a small light-emitting area, the structural complexity and the cost of the light source system are increased. Therefore, it is not suitable to uniformly adopt the fast-axis and slow-axis collimation system in the light source system including multiple types of light emitting units.

In view of this, an embodiment of the present application provides a collimation coupling system for a light source, including:

the semiconductor laser light source module comprises a plurality of types of light-emitting units with different light-emitting areas;

the collimation module is arranged on one side of the light emitting direction of the semiconductor laser light source module and comprises a first collimation unit and a second collimation unit, wherein the first collimation unit is used for collimating emergent rays of the light emitting units with the light emitting areas smaller than a preset value, and the second collimation unit is used for collimating emergent rays of the light emitting units with the light emitting areas larger than or equal to the preset value;

and the coupling module is used for coupling the collimated emergent light rays emitted by the light emitting unit and then emitting the coupled emergent light rays.

The light source module of the collimation coupling system of the semiconductor laser light source comprises multiple types of light emitting units with different light emitting areas, one side of the light emitting direction of each light emitting module is provided with a collimation module comprising a first type of collimation unit and a second type of collimation unit, the first type of collimation unit is used for collimating emergent rays of the light emitting units with the light emitting areas smaller than a preset value, and the second type of collimation unit is used for collimating emergent rays of the light emitting units with the light emitting areas larger than or equal to the preset value, so that the purpose of setting appropriate collimation units for the light emitting units with different light emitting areas is achieved, and the structure complexity and the overall cost of the collimation coupling system of the semiconductor laser light source are favorably reduced.

The technical solutions in the embodiments of the present application will be clearly and completely 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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The embodiment of the present application provides a collimation coupling system of a semiconductor laser light source, as shown in fig. 1, including:

the semiconductor laser light source module 10, the semiconductor laser light source module 10 includes multiple kinds of light emitting units with different light emitting areas;

the collimating module 20 is arranged on one side of the light emitting direction of the semiconductor laser light source module 10, and the collimating module 20 includes a first collimating unit 21 and a second collimating unit 22, where the first collimating unit 21 is used for collimating the emergent light of the light emitting unit with the light emitting area smaller than a preset value, and the second collimating unit 22 is used for collimating the emergent light of the light emitting unit with the light emitting area larger than or equal to the preset value;

and the coupling module (no reference numeral is marked in fig. 1) is used for coupling the collimated emergent light emitted by the light emitting unit and then emitting the coupled emergent light.

In this embodiment, for the semiconductor laser light source module 10, the multiple types of light emitting units included in the semiconductor laser light source module 10 may be light emitting units for emitting different color lights, and the number of each type of light emitting unit may be one or multiple. Optionally, the laser light source module is a semiconductor laser tube for emitting laser with a preset color;

the preset color laser is any one of three primary color lasers.

For the light source system, the three primary colors refer to red, green and blue, and accordingly, the three primary color laser light includes red laser light, green laser light and blue laser light.

As described above, the semiconductor laser tube having a light emitting area of several tens of square micrometers is generally referred to as a small light emitting area semiconductor laser tube, and the semiconductor laser tube having a light emitting area of several hundreds of square micrometers is generally referred to as a large light emitting area semiconductor laser tube, so in the embodiment of the present application, the preset value may be 100 micrometers. Certainly, for different types of light emitting units, the value of the preset value may be changed accordingly, which is not limited in this application.

Alternatively, referring to fig. 2, fig. 2 shows a possible arrangement of the light emitting units, where "red", "green", and "blue" in fig. 2 respectively refer to light emitting units for emitting red laser light, green laser light, and blue laser light, and a plurality of the laser light source modules are arranged on the base in an array manner. However, in other embodiments of the present application, the arrangement of the multiple types of light-emitting units may also be determined according to actual requirements.

Optionally, the collimation coupling system of the semiconductor laser light source further includes: a base for fixing the semiconductor laser light source module 10;

the light emitting unit includes: the laser light source module and the heat sink;

the heat sink is used for fixing the laser light source module on the base.

The heat sink (heat sink) is a structure whose temperature does not change with the amount of heat energy transferred to the heat sink, and optionally, the heat sink is further configured to transfer heat emitted by the laser light source module to the base so as to maintain the operating temperature of the laser light source module within a preset operating range.

Optionally, the heat sink may be a copper pillar or other structure with better thermal conductivity.

On the basis of the above embodiments, in an embodiment of the present application, the first type of collimating unit 21 is an aspheric lens collimating system or a fast-slow axis collimating system;

the second type of collimation unit 22 is a fast-slow axis collimation system.

However, for the light emitting unit with the light emitting area smaller than the preset value, the aspheric lens collimation system is used for collimating the emergent light, so that the structural complexity and the overall cost of the whole system are favorably reduced. That is, optionally, the first collimating unit 21 is an aspheric lens collimating system.

The aspheric lens collimation system can be composed of a single lens or a lens group comprising a plurality of lenses, which is not limited in the application and is determined according to the actual situation.

Referring to fig. 3, 4 and 5, fig. 3 is a schematic structural diagram of the fast and slow axis collimation system, fig. 4 is a schematic diagram of the fast and slow axis collimation system shown in fig. 3 in a first direction, fig. 5 is a schematic diagram of the fast and slow axis collimation system shown in fig. 3 in a second direction, reference numeral 11 in fig. 3-5 denotes the light emitting unit, the first direction and the second direction are two directions perpendicular to each other in the same plane, and the fast and slow axis collimation system includes: a first collimating element 221 and a second collimating element 222 disposed opposite to each other;

the first collimating element 221 is configured to collimate a fast-axis divergence angle of an outgoing light ray of the light emitting unit;

the second collimating element 222 is used to collimate the slow-axis divergence of the outgoing light rays of the light emitting unit.

The first collimating element 221 and the second collimating element 222 may be both cylindrical lenses as shown in fig. 3, and correspondingly, the fast-axis and slow-axis collimating system is a cylindrical lens array formed by the first collimating element 221 and the second collimating element 222.

A description is given below of a possible structure of a coupling module of a collimation coupling system of a semiconductor laser light source provided in an embodiment of the present application.

Still referring to fig. 1, the coupling module includes: a focusing lens 40, a fiber connector 50 and a plurality of mirrors 30; wherein the content of the first and second substances,

the plurality of reflectors 30 correspond to the plurality of light emitting units one by one, and the reflectors 30 are used for reflecting collimated emergent light of the light emitting units corresponding to the reflectors 30 to the focusing lens 40;

the focusing lens 40 is configured to focus the outgoing light reflected by the reflector 30 and transmit the focused outgoing light to the optical fiber connector 50, so that the focused outgoing light is transmitted through the optical fiber interface.

In this embodiment, the number of the focusing lens 40 and the number of the optical fiber connectors 50 are both one, and at this time, the emergent light of all the light emitting units is output through one optical fiber connector 50, where the optical fiber connector may be an FC interface, an SMA905 interface, an SC interface, or an ST interface.

Optionally, the coupling module includes: a plurality of focusing lenses 40, a plurality of fiber interfaces, and a plurality of mirrors 30; wherein the content of the first and second substances,

the plurality of reflectors 30 correspond to the plurality of light emitting units one by one, and the reflectors 30 are used for reflecting the collimated emergent light of the same type of the light emitting unit corresponding to the reflector 30 to the same focusing lens 40;

the focusing lenses 40 correspond to the optical fiber interfaces one by one, and the focusing lenses 40 are configured to focus the reflected same type of outgoing light and transmit the focused same type of outgoing light to the optical fiber connectors 50 corresponding to the focusing lenses 40, so that the focused same type of outgoing light is transmitted outwards through the optical fiber interfaces.

In this embodiment, the number of the focusing lens 40 and the number of the optical fiber connectors 50 are both multiple, and the same type of outgoing light emitted by the same type of light emitting unit can be output through one optical fiber connector 50.

For example, when the kind of the light emitting unit is 3 kinds and the light emitting units are respectively used for outputting red, green and blue laser light, the number of the focusing lens 40 and the optical fiber connector 50 may also be 3, so that the outgoing light of red, green and blue may be respectively output through the three optical fiber connectors 50.

To sum up, the embodiment of the present application provides a semiconductor laser light source's collimation coupled system, semiconductor laser light source's collimation coupled system's light source module 10 includes that the multiclass has different light-emitting area's luminescence unit, luminescence module's light-emitting direction one side is provided with collimation module 20 including first type collimation unit 21 and second type collimation unit 22, first type collimation unit 21 is used for the emergent ray of the luminescence unit that the collimation luminous area is less than the default, second type collimation unit 22 is used for the emergent ray of the luminescence unit that the collimation luminous area is greater than or equal to the default to the realization sets up the purpose of suitable collimation unit for different light-emitting area's luminescence unit.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. A collimation coupling system of a semiconductor laser light source is characterized by comprising:

the semiconductor laser light source module comprises a plurality of types of light-emitting units with different light-emitting areas;

the collimation module is arranged on one side of the light emitting direction of the semiconductor laser light source module and comprises a first collimation unit and a second collimation unit, wherein the first collimation unit is used for collimating emergent rays of the light emitting units with the light emitting areas smaller than a preset value, and the second collimation unit is used for collimating emergent rays of the light emitting units with the light emitting areas larger than or equal to the preset value;

and the coupling module is used for coupling the collimated emergent light rays emitted by the light emitting unit and then emitting the coupled emergent light rays.

2. The collimating coupling system of a semiconductor laser light source of claim 1, further comprising:

the base is used for fixing the semiconductor laser light source module;

the light emitting unit includes: the laser light source module and the heat sink;

the heat sink is used for fixing the laser light source module on the base.

3. The collimating and coupling system of claim 2, wherein the laser source module is a semiconductor laser tube for emitting laser light with a predetermined color;

the preset color laser is any one of three primary color lasers;

the heat sink is also used for transferring heat emitted by the laser light source module to the base so as to keep the working temperature of the laser light source module within a preset working range.

4. The collimating and coupling system of claim 3, wherein a plurality of laser source modules are arranged in an array on the base.

5. The collimation coupling system of the semiconductor laser light source as claimed in claim 1, wherein the first collimation unit is an aspheric lens collimation system or a fast-slow axis collimation system;

the second type of collimation unit is a fast-slow axis collimation system.

6. The collimating coupling system of the semiconductor laser light source of claim 5, wherein the fast and slow axis collimating system comprises: the first collimating element and the second collimating element are oppositely arranged;

the first collimating element is used for collimating the fast axis divergence angle of the emergent ray of the light-emitting unit;

the second collimating element is used for collimating the slow-axis divergence angle of the emergent ray of the light-emitting unit.

7. The collimating coupling system of the semiconductor laser light source of claim 1, wherein the coupling module comprises: a focusing lens, an optical fiber connector and a plurality of reflectors; wherein the content of the first and second substances,

the plurality of reflectors correspond to the plurality of light-emitting units one by one, and the reflectors are used for reflecting collimated emergent light of the light-emitting units corresponding to the reflectors to the focusing lens;

the focusing lens is used for focusing the emergent light rays reflected by the reflector and then transmitting the focused emergent light rays to the optical fiber connector so that the focused emergent light rays are transmitted outwards through the optical fiber interface.

8. The collimating coupling system of the semiconductor laser light source of claim 1, wherein the coupling module comprises: a plurality of focusing lenses, a plurality of optical fiber interfaces, and a plurality of mirrors; wherein the content of the first and second substances,

the reflectors correspond to the light-emitting units one by one, and are used for reflecting the collimated emergent light of the same type of the light-emitting units corresponding to the reflectors to the same focusing lens;

the focusing lenses are in one-to-one correspondence with the optical fiber interfaces, and are used for focusing the reflected same type of emergent light and then transmitting the same type of emergent light to the optical fiber connectors corresponding to the focusing lenses, so that the focused same type of emergent light is transmitted outwards through the optical fiber interfaces.

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