A collimation coupling system for semiconductor laser light source

Abstract

The present application discloses a collimation coupling system for a semiconductor laser light source, wherein the light source module of the collimation coupling system for the semiconductor laser light source comprises multiple types of light-emitting units with different light-emitting areas, and a collimation module comprising a first type of collimation unit and a second type of collimation unit is arranged on one side of the light-emitting direction of the light-emitting module, wherein the first type of collimation unit is used for collimating the outgoing light of the light-emitting unit with a light-emitting area smaller than a preset value, and the second type of collimation unit is used for collimating the outgoing light of the light-emitting unit with a light-emitting area greater than or equal to a preset value, so as to achieve the purpose of setting appropriate collimation units for the light-emitting units with different light-emitting areas.

Description

Technical Field

[0001] The present application relates to the technical field of optical path design, and more specifically, to a collimation coupling system of a semiconductor laser light source. Background Art

[0002] The light source collimation system is an important component of most light source systems and an important structure for forming the required light beam.

[0003] For light source systems using semiconductor laser tubes as the main light source, suitable collimation systems are different for semiconductor laser tubes with different parameters. In the same light source system, in order to meet different application requirements, it usually includes a variety of semiconductor laser tubes with different parameters. How to set up suitable collimation systems for these semiconductor laser tubes with different parameters in the same light source system has become one of the research directions of technicians in this field. Summary of the invention

[0004] In order to solve the above technical problems, the present application provides a collimation coupling system for a semiconductor laser light source, which achieves the purpose of setting suitable collimation units for light-emitting units with different light-emitting areas by setting different types of collimation units for light-emitting units with different light-emitting areas.

[0005] To achieve the above technical objectives, the present application provides the following technical solutions:

[0006] A collimation coupling system for a semiconductor laser light source, comprising:

[0007] A semiconductor laser light source module, wherein the semiconductor laser light source module includes multiple types of light-emitting units with different light-emitting areas;

[0008] A collimation module is arranged on one side of the light emitting direction of the semiconductor laser light source module, the collimation module includes a first type of collimation unit and a second type of collimation unit, wherein the first type of collimation unit is used to collimate the outgoing light of the light emitting unit whose light emitting area is smaller than a preset value, and the second type of collimation unit is used to collimate the outgoing light of the light emitting unit whose light emitting area is greater than or equal to the preset value;

[0009] The coupling module is used to couple the collimated light emitted by the light emitting unit and then emit it.

[0010] Optionally, also include:

[0011] A base for fixing the semiconductor laser light source module;

[0012] The light emitting unit comprises: a laser light source module and a heat sink;

[0013] The heat sink is used to fix the laser light source module on the base.

[0014] Optionally, the laser light source module is a semiconductor laser tube for emitting laser light of a preset color;

[0015] The preset color laser is any one of the three primary color lasers;

[0016] The heat sink is also used to transfer the heat emitted by the laser light source module to the base, so as to keep the operating temperature of the laser light source module within a preset operating range.

[0017] Optionally, a plurality of the laser light source modules are arranged in an array on the base.

[0018] Optionally, the first type of collimation unit is an aspheric lens collimation system or a fast-slow axis collimation system;

[0019] The second type of collimation unit is a fast and slow axis collimation system.

[0020] Optionally, the fast-slow axis collimation system comprises: a first collimation element and a second collimation element arranged opposite to each other;

[0021] The first collimating element is used to collimate the fast axis divergence angle of the outgoing light of the light emitting unit;

[0022] The second collimating element is used to collimate the slow axis divergence angle of the outgoing light of the light emitting unit.

[0023] Optionally, the coupling module includes: a focusing lens, an optical fiber connector and a plurality of reflectors; wherein,

[0024] The plurality of reflectors correspond to the plurality of light-emitting units one by one, and the reflectors are used to reflect the collimated outgoing light of the light-emitting unit corresponding to the reflectors toward the focusing lens;

[0025] The focusing lens is used to focus the outgoing light reflected by the reflector and transmit it to the optical fiber connector, so that the focused outgoing light is transmitted outward through the optical fiber interface.

[0026] Optionally, the coupling module includes: a plurality of focusing lenses, a plurality of optical fiber interfaces and a plurality of reflectors; wherein,

[0027] The plurality of reflectors correspond one to one with the plurality of light-emitting units, and the reflectors are used to reflect the collimated light of the same type emitted by the light-emitting units corresponding to the reflectors toward the same focusing lens;

[0028] The multiple focusing lenses correspond one-to-one to the multiple optical fiber interfaces. The focusing lenses are used to focus the same type of outgoing light after reflection and transmit it to the optical fiber connector corresponding to the focusing lens, so that the focused outgoing light of the same type is transmitted outward through the optical fiber interface.

[0029] It can be seen from the above technical scheme that the embodiment of the present application provides a collimation coupling system for a semiconductor laser light source, wherein the light source module of the collimation coupling system for the semiconductor laser light source includes multiple types of light-emitting units with different light-emitting areas, and a collimation module including a first type of collimation unit and a second type of collimation unit is arranged on one side of the light-emitting direction of the light-emitting module, wherein the first type of collimation unit is used for collimating the outgoing light of the light-emitting unit whose light-emitting area is smaller than a preset value, and the second type of collimation unit is used for collimating the outgoing light of the light-emitting unit whose light-emitting area is greater than or equal to a preset value, so as to achieve the purpose of setting suitable collimation units for light-emitting units with different light-emitting areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0031] Figure 1 A schematic structural diagram of a collimation coupling system for a semiconductor laser light source provided in one embodiment of the present application;

[0032] Figure 2 A schematic diagram of an arrangement of light-emitting units in a light-emitting module provided in an embodiment of the present application;

[0033] Figure 3-Figure 5 A schematic diagram of the structure of a fast and slow axis alignment system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0034] As described in the background art, in the prior art, when a light source system includes a plurality of semiconductor laser tubes with different parameters, it is impossible to set a suitable collimation system for these semiconductor laser tubes.

[0035] Specifically, the inventors have found that for semiconductor laser tubes with small light-emitting areas (e.g., light-emitting areas in the order of tens of square microns), the aspherical lens collimation system can generally meet the collimation requirements of semiconductor laser tubes with small light-emitting areas, while for semiconductor laser tubes with large light-emitting areas (e.g., light-emitting areas in the order of hundreds of square microns) (e.g., red light semiconductor laser tubes), the aspherical lens collimation system is difficult to collimate (or compress) the light beam to a sufficiently small range to enter a small-diameter optical fiber, which limits the beam combination of semiconductor laser tubes with different light-emitting areas in a small optical fiber, which is very unfavorable for the application of high-brightness RGB color light in a light source system. Therefore, for semiconductor laser tubes with large light-emitting areas, a fast and slow axis collimation system is usually used to collimate the light emitted by them, but the structure of the fast and slow axis collimation system is relatively complex. If the fast and slow axis collimation system is also used for collimation of semiconductor laser tubes with small light-emitting areas, the structural complexity and cost of the light source system will increase. Therefore, it is not suitable to uniformly use a fast and slow axis collimation system in a light source system including multiple types of light-emitting units.

[0036] In view of this, an embodiment of the present application provides a collimation coupling system of a light source, comprising:

[0037] A semiconductor laser light source module, wherein the semiconductor laser light source module includes multiple types of light-emitting units with different light-emitting areas;

[0038] A collimation module is arranged on one side of the light emitting direction of the semiconductor laser light source module, the collimation module includes a first type of collimation unit and a second type of collimation unit, wherein the first type of collimation unit is used to collimate the outgoing light of the light emitting unit whose light emitting area is smaller than a preset value, and the second type of collimation unit is used to collimate the outgoing light of the light emitting unit whose light emitting area is greater than or equal to the preset value;

[0039] The coupling module is used to couple the collimated light emitted by the light emitting unit and then emit it.

[0040] The light source module of the collimation coupling system of the semiconductor laser light source includes multiple types of light-emitting units with different light-emitting areas. A collimation module including a first type of collimation unit and a second type of collimation unit is arranged on one side of the light-emitting direction of the light-emitting module. The first type of collimation unit is used to collimate the outgoing light of the light-emitting unit whose light-emitting area is smaller than a preset value, and the second type of collimation unit is used to collimate the outgoing light of the light-emitting unit whose light-emitting area is greater than or equal to the preset value, so as to achieve the purpose of setting suitable collimation units for light-emitting units with different light-emitting areas, which is beneficial to reducing the structural complexity and overall cost of the collimation coupling system of the semiconductor laser light source.

[0041] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0042] The present application embodiment provides a collimation coupling system for a semiconductor laser light source, such as Figure 1 As shown, including:

[0043] A semiconductor laser light source module 10, wherein the semiconductor laser light source module 10 includes multiple types of light-emitting units with different light-emitting areas;

[0044] A collimation module 20 is arranged on one side of the light emitting direction of the semiconductor laser light source module 10, and the collimation module 20 includes a first type of collimation unit 21 and a second type of collimation unit 22, wherein the first type of collimation unit 21 is used to collimate the outgoing light of the light emitting unit whose light emitting area is smaller than a preset value, and the second type of collimation unit 22 is used to collimate the outgoing light of the light emitting unit whose light emitting area is greater than or equal to the preset value;

[0045] Coupling module (attached Figure 1 (not marked with a reference number) and is used to couple the collimated light emitted by the light-emitting unit and then emit it.

[0046] 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 light of different colors, and the number of each type of light-emitting unit may be one or more. That is, optionally, the laser light source module is a semiconductor laser tube for emitting laser of a preset color;

[0047] The preset color laser is any one of the three primary color lasers.

[0048] For the light source system, the three primary colors refer to red, green and blue, and accordingly, the three primary color lasers include red laser, green laser and blue laser.

[0049] As mentioned above, semiconductor laser tubes with a light-emitting area of ​​tens of square microns are generally called semiconductor laser tubes with a small light-emitting area, and semiconductor laser tubes with a light-emitting area of ​​hundreds of square microns are called semiconductor laser tubes with a large light-emitting area. Therefore, in the embodiment of the present application, the value of the preset value can be 100 microns. Of course, for different types of light-emitting units, the value of the preset value can vary accordingly, and the present application does not limit this.

[0050] Optional, reference Figure 2 , Figure 2 A feasible arrangement of the light-emitting units is shown. Figure 2 The "red", "green" and "blue" in the figure refer to light-emitting units for emitting red laser, green laser and blue laser respectively, and a plurality of the laser light source modules are arranged in an array on the base. However, in other embodiments of the present application, the arrangement of the plurality of light-emitting units can also be determined according to actual needs.

[0051] Optionally, the collimation coupling system of the semiconductor laser light source further includes: a base for fixing the semiconductor laser light source module 10;

[0052] The light emitting unit comprises: a laser light source module and a heat sink;

[0053] The heat sink is used to fix the laser light source module on the base.

[0054] A heat sink refers to a structure whose temperature does not change with the amount of heat energy transferred to it. Optionally, the heat sink is also used to transfer the heat emitted by the laser light source module to the base to keep the operating temperature of the laser light source module within a preset operating range.

[0055] Optionally, the heat sink may be a structure with good thermal conductivity such as a copper column.

[0056] On the basis of the above embodiments, in one embodiment of the present application, the first type of collimation unit 21 is an aspheric lens collimation system or a fast and slow axis collimation system;

[0057] The second type of collimation unit 22 is a fast-slow axis collimation system.

[0058] However, for a light emitting unit whose light emitting area is smaller than the preset value, an aspherical lens collimation system can be used to collimate its outgoing light, which is beneficial to reduce the structural complexity and overall cost of the entire system. Optionally, the first type of collimation unit 21 is an aspherical lens collimation system.

[0059] The aspheric lens collimation system may be composed of a single lens or a lens group including multiple lenses, which is not limited in the present application and depends on the actual situation.

[0060] refer to Figure 3 , Figure 4 and Figure 5 , Figure 3 is a schematic diagram of the structure of the fast and slow axis collimation system, Figure 4 for Figure 3 The schematic diagram of the fast and slow axis collimation system in the first direction is shown. Figure 5 for Figure 3The schematic diagram of the fast and slow axis collimation system in the second direction is shown. Figure 3-Figure 5 The reference numeral 11 in the figure represents 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-slow axis collimation system comprises: a first collimation element 221 and a second collimation element 222 arranged opposite to each other;

[0061] The first collimating element 221 is used to collimate the fast axis divergence angle of the outgoing light of the light emitting unit;

[0062] The second collimating element 222 is used to collimate the slow axis divergence angle of the light emitted by the light emitting unit.

[0063] The first collimating element 221 and the second collimating element 222 may both be as follows Figure 3 The cylindrical lens shown in the figure, correspondingly, the fast-slow axis collimation system is a cylindrical lens array composed of the first collimating element 221 and the second collimating element 222.

[0064] The following describes a feasible structure of a coupling module of a collimation coupling system for a semiconductor laser light source provided in an embodiment of the present application.

[0065] Still reference Figure 1 The coupling module includes: a focusing lens 40, a fiber connector 50 and a plurality of reflectors 30; wherein,

[0066] The plurality of reflectors 30 correspond to the plurality of light-emitting units one by one, and the reflectors 30 are used to reflect the collimated outgoing light of the light-emitting unit corresponding to the reflectors 30 toward the focusing lens 40;

[0067] The focusing lens 40 is used to focus the outgoing light reflected by the reflector 30 and transmit it to the optical fiber connector 50, so that the focused outgoing light is transmitted outward through the optical fiber interface.

[0068] In this embodiment, the number of the focusing lens 40 and the optical fiber connector 50 are both one, and the output light of all the light-emitting units is output through one optical fiber connector 50, and the optical fiber connector can be an FC interface, SMA905 interface, SC interface or ST interface.

[0069] Optionally, the coupling module includes: a plurality of focusing lenses 40, a plurality of optical fiber interfaces and a plurality of reflectors 30; wherein,

[0070] The plurality of reflectors 30 correspond to the plurality of light-emitting units one by one, and the reflectors 30 are used to reflect the collimated light of the same type emitted by the light-emitting units corresponding to the reflectors 30 to the same focusing lens 40;

[0071] The multiple focusing lenses 40 correspond one-to-one to the multiple optical fiber interfaces. The focusing lenses 40 are used to focus the same type of outgoing light after reflection and transmit it to the optical fiber connector 50 corresponding to the focusing lens 40, so that the focused same type of outgoing light can be transmitted outward through the optical fiber interface.

[0072] In this embodiment, there are multiple focusing lenses 40 and multiple optical fiber connectors 50 . In this case, the same type of emitted light emitted by the same type of light-emitting units can be output through one optical fiber connector 50 .

[0073] For example, when there are three types of light-emitting units, which are used to output red, green and blue lasers respectively, the number of the focusing lenses 40 and the optical fiber connectors 50 can also be three, so that the red, green and blue output light rays can be output through the three optical fiber connectors 50 respectively.

[0074] In summary, the embodiment of the present application provides a collimation coupling system for a semiconductor laser light source, wherein the light source module 10 of the collimation coupling system for the semiconductor laser light source includes multiple types of light-emitting units with different light-emitting areas, and a collimation module 20 including a first type of collimation unit 21 and a second type of collimation unit 22 is arranged on one side of the light-emitting direction of the light-emitting module, wherein the first type of collimation unit 21 is used to collimate the outgoing light of the light-emitting unit whose light-emitting area is smaller than a preset value, and the second type of collimation unit 22 is used to collimate the outgoing light of the light-emitting unit whose light-emitting area is greater than or equal to a preset value, so as to achieve the purpose of setting suitable collimation units for light-emitting units with different light-emitting areas.

[0075] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0076] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A collimation coupling system for a semiconductor laser light source, characterized in that: include: A semiconductor laser light source module, wherein the semiconductor laser light source module includes multiple types of light-emitting units with different light-emitting areas; A collimation module is arranged on one side of the light emitting direction of the semiconductor laser light source module, the collimation module includes a first type of collimation unit and a second type of collimation unit, wherein the first type of collimation unit is used to collimate the outgoing light of the light emitting unit whose light emitting area is smaller than a preset value, and the second type of collimation unit is used to collimate the outgoing light of the light emitting unit whose light emitting area is greater than or equal to the preset value; the first type of collimation unit is an aspheric lens collimation system; the aspheric lens collimation system is composed of a single lens; the second type of collimation unit is a fast and slow axis collimation system; The coupling module is used to couple the collimated light emitted by the light emitting unit and then emit it.

2. The collimation coupling system of a semiconductor laser light source according to claim 1, characterized in that: Also includes: A base for fixing the semiconductor laser light source module; The light emitting unit comprises: a laser light source module and a heat sink; The heat sink is used to fix the laser light source module on the base.

3. The collimation coupling system of a semiconductor laser light source according to claim 2, characterized in that: The laser light source module is a semiconductor laser tube for emitting laser light of a preset color; The preset color laser is any one of the three primary color lasers; The heat sink is also used to transfer the heat emitted by the laser light source module to the base, so as to keep the operating temperature of the laser light source module within a preset operating range.

4. The collimation coupling system of a semiconductor laser light source according to claim 3, characterized in that: The plurality of laser light source modules are arranged in an array on the base.

5. The collimation coupling system of a semiconductor laser light source according to claim 1, characterized in that: The fast-slow axis collimation system comprises: a first collimation element and a second collimation element arranged opposite to each other; The first collimating element is used to collimate the fast axis divergence angle of the outgoing light of the light emitting unit; The second collimating element is used to collimate the slow axis divergence angle of the outgoing light of the light emitting unit.

6. The collimation coupling system of a semiconductor laser light source according to claim 1, characterized in that: The coupling module includes: a focusing lens, an optical fiber connector and a plurality of reflectors; wherein, The plurality of reflectors correspond to the plurality of light-emitting units one by one, and the reflectors are used to reflect the collimated outgoing light of the light-emitting unit corresponding to the reflectors toward the focusing lens; The focusing lens is used to focus the outgoing light reflected by the reflector and transmit it to the optical fiber connector, so that the focused outgoing light is transmitted outward through the optical fiber interface.

7. The collimation coupling system of a semiconductor laser light source according to claim 1, characterized in that: The coupling module includes: a plurality of focusing lenses, a plurality of optical fiber interfaces and a plurality of reflectors; wherein, The plurality of reflectors correspond one to one with the plurality of light-emitting units, and the reflectors are used to reflect the collimated light of the same type emitted by the light-emitting units corresponding to the reflectors toward the same focusing lens; The multiple focusing lenses correspond one-to-one to the multiple optical fiber interfaces. The focusing lenses are used to focus the same type of outgoing light after reflection and transmit it to the optical fiber connector corresponding to the focusing lens, so that the focused outgoing light of the same type is transmitted outward through the optical fiber interface.

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