阅读说明：本技术 一种大功率短波半导体激光照明器 (High-power short-wave semiconductor laser illuminator ) 是由 梅超 刘庆 方尧 宋晓东 于 2020-04-28 设计创作，主要内容包括：本发明涉及一种照明设备,尤其涉及一种大功率短波半导体激光照明器。本发明的目的是解决现有短波成像设备存在夜间难以对数公里距离外的物体实现照明的技术问题,提供一种大功率短波半导体激光照明器。该照明器包括包括M个驱动电源、M个散热片、N个短波半导体激光器、N条激光器输出光纤、耦合器、照明输出光纤、扩束准直镜、对流风扇；N个短波半导体激光器分为M个组；每个散热片上设置一个驱动电源以及一组短波半导体激光器；N个短波半导体激光器的输出端通过N条激光器输出光纤连接耦合器,耦合器输入端的N条激光器输出光纤呈中心对称式布置；耦合器通过照明输出光纤连接扩束准直镜；照明输出光纤长度≥200mm。(The invention relates to a lighting device, in particular to a high-power short-wave semiconductor laser illuminator. The invention aims to solve the technical problem that the existing short-wave imaging equipment is difficult to realize illumination on objects at night beyond the distance of several kilometers, and provides a high-power short-wave semiconductor laser illuminator. The illuminator comprises M driving power supplies, M radiating fins, N short-wave semiconductor lasers, N laser output optical fibers, a coupler, an illumination output optical fiber, a beam expanding collimating lens and a convection fan; n short-wave semiconductor lasers are divided into M groups; each heat dissipation sheet is provided with a driving power supply and a group of short-wave semiconductor lasers; the output ends of the N short-wave semiconductor lasers are connected with the coupler through N laser output optical fibers, and the N laser output optical fibers at the input end of the coupler are arranged in a central symmetry mode; the coupler is connected with the beam expanding collimating lens through the illumination output optical fiber; the length of the illumination output optical fiber is more than or equal to 200 mm.)

1. A high-power shortwave semiconductor laser illuminator is characterized in that: the device comprises M driving power supplies (1), M radiating fins (7), N short-wave semiconductor lasers (2), N laser output optical fibers (3), a coupler (4), a lighting output optical fiber (5), a beam expanding collimating lens (6) and a convection fan (8), wherein N is more than or equal to 2, and M is more than or equal to 1;

n short-wave semiconductor lasers (2) are divided into M groups;

each radiating fin (7) is provided with a driving power supply (1) and a group of short-wave semiconductor lasers (2) powered by the driving power supply (1);

the output ends of the N short-wave semiconductor lasers (2) are connected with the input end of the coupler (4) through N laser output optical fibers (3), and the N laser output optical fibers (3) at the input end of the coupler (4) are arranged in a centrosymmetric mode;

the coupler (4) is connected with a beam expanding collimating lens (6) through an illumination output optical fiber (5);

the M radiating fins (7) are arranged in parallel and in a clearance mode;

the convection fan (8) is arranged on one side of the M radiating fins (7) and is used for the convection heat dissipation of the M radiating fins (7);

all the laser output fibers (3) on each radiating fin (7) are arranged in a coiling manner, and the coiling radius is larger than or equal to the turning radius of the laser output fibers (3);

the illumination output optical fiber (5) is arranged in a coiling manner, and the coiling radius is larger than or equal to the turning radius of the illumination output optical fiber (5);

the length of the illumination output optical fiber (5) is more than or equal to 200 mm.

2. The high-power short-wave semiconductor laser illuminator of claim 1, wherein: the wavelength of the short-wave semiconductor laser (2) is 1550 nm.

3. The high-power short-wave semiconductor laser illuminator of claim 1, wherein: the radiating fins (7) are made of copper or aluminum.

4. The high-power short-wave semiconductor laser illuminator of claim 1, wherein: the beam expanding collimating lens (6) adopts a zoom lens.

5. The high-power short-wave semiconductor laser illuminator of any one of claims 1 to 4, wherein: the N is 19, and the M is 3.

6. The high-power short-wave semiconductor laser illuminator of claim 5, wherein: and 6, 6 and 7 short-wave semiconductor lasers (2) are respectively arranged on the three radiating fins (7).

7. The high-power short-wave semiconductor laser illuminator of claim 6, wherein: the arrangement mode of 19 laser output optical fibers (3) at the input end of the coupler (4) is as follows: the center is 1 route, and two circles are arranged from inside to outside by taking the center as the center, the inner circle is 6 routes, and the outer circle is 12 routes.

Technical Field

The invention relates to a lighting device, in particular to a high-power short-wave semiconductor laser illuminator.

Background

With the continuous development of short wave imaging technology, the application of short wave imaging equipment is more and more extensive. Since the investigation and search activities are usually performed at normal temperature, the object to be detected is imaged by the energy of sunlight reflected by the object to be detected. However, no sunlight is irradiated at night, and lighting equipment is needed for assistance in order to realize imaging, but the power of the conventional short-wave light-emitting chip is limited, so that objects beyond a kilometer distance are difficult to realize illumination.

Disclosure of Invention

The invention aims to solve the technical problem that the existing short-wave imaging equipment is difficult to realize illumination on objects at night beyond the distance of several kilometers, and provides a high-power short-wave semiconductor laser illuminator.

In order to solve the technical problems, the technical solution provided by the invention is as follows:

a high-power short-wave semiconductor laser illuminator is characterized in that: the device comprises M driving power supplies, M radiating fins, N short-wave semiconductor lasers, N laser output optical fibers, a coupler, a lighting output optical fiber, a beam expanding collimating lens and a convection fan, wherein N is more than or equal to 2, and M is more than or equal to 1;

n short-wave semiconductor lasers are divided into M groups;

each heat dissipation sheet is provided with a driving power supply and a group of short-wave semiconductor lasers powered by the driving power supply;

the output ends of the N short-wave semiconductor lasers are connected with the input end of the coupler through N laser output optical fibers, and the N laser output optical fibers at the input end of the coupler are arranged in a central symmetry mode;

the coupler is connected with the beam expanding collimating lens through the illumination output optical fiber;

the M radiating fins are arranged in parallel and in a clearance mode;

the convection fan is arranged on one side of the M radiating fins and used for the convection heat dissipation of the M radiating fins;

all the laser output fibers on each radiating fin are arranged in a coiling manner, and the coiling radius is larger than or equal to the turning radius of the laser output fibers;

the illumination output optical fiber is arranged in a coiling manner, and the coiling radius is larger than or equal to the turning radius of the illumination output optical fiber;

the length of the illumination output optical fiber is more than or equal to 200 mm.

Further, the wavelength of the short-wave semiconductor laser is 1550 nm.

Furthermore, the material of the heat sink is copper or aluminum.

Further, the beam expanding and collimating lens adopts a zoom lens.

Further, N is 19 and M is 3.

Furthermore, 6 and 7 short-wave semiconductor lasers are respectively arranged on the three radiating fins.

Further, the arrangement mode of the N laser output optical fibers at the input end of the coupler is as follows: the center is 1 route, and two circles are arranged from inside to outside by taking the center as the center, the inner circle is 6 routes, and the outer circle is 12 routes.

Compared with the prior art, the invention has the following beneficial effects:

1. the high-power short-wave semiconductor laser illuminator provided by the invention has the advantages that the plurality of short-wave semiconductor lasers are driven to emit light, energy is coupled into one beam by using the optical fiber, and high-power output is finally formed, so that the output energy of the short-wave semiconductor laser illuminator is increased to dozens of times of that of a single short-wave semiconductor laser, namely, the plurality of kilowatt-level short-wave semiconductor lasers are combined into the dozens of kilowatt-level short-wave semiconductor laser illuminator, and finally, the illuminating effect that the short-wave power is not less than 30W and the illuminating can reach several kilometers is achieved, the problems that the conventional short-wave semiconductor laser has small power and is difficult to illuminate objects at distances of several.

2. The short-wave semiconductor laser is used as a light-emitting chip, and the light-emitting chip is small and exquisite in size and convenient to use relative to short-wave solid and short-wave optical fiber lasers.

3. The short-wave semiconductor laser output optical fiber and the coupled illumination output optical fiber are arranged in a coiling mode, and the size of the whole illuminator is further reduced.

4. The coiling radius of the laser output optical fiber and the illumination output optical fiber should not be smaller than the turning radius of the optical fiber so as to prevent light leakage.

5. N laser output optical fibers at the input end of the coupler are arranged in a centrosymmetric mode to ensure the uniformity of light before coupling.

6. The length of the illumination output fiber should be more than or equal to 200mm to ensure that the length of the fiber is enough to homogenize the input light.

7. And a convection fan is arranged on the side of the radiating fin and used for cooling and radiating the driving power supply and the short-wave semiconductor laser, and the radiating effect is improved in an air convection mode.

8. The high-power short-wave semiconductor laser illuminator provided by the invention is mainly used for 1550nm waveband, but not limited to the waveband.

9. The beam expanding collimating lens can be a fixed-focus lens or a zoom lens, and when the zoom lens is adopted, output light can be shaped, so that the light spot size modulation is realized, and the size of an illumination range is controlled.

10. The values of M and N can be adjusted according to the specific volume and weight requirements of the high-power short-wave semiconductor laser illuminator.

Drawings

FIG. 1 is a schematic structural diagram of a high-power shortwave semiconductor laser illuminator of the present invention;

FIG. 2 is a schematic cross-sectional view of 19 laser output fibers at the input end of a coupler arranged in a centrosymmetric manner according to an embodiment of the present invention;

description of reference numerals:

1-driving power supply, 2-short wave semiconductor laser, 3-laser output optical fiber, 4-coupler, 5-lighting output optical fiber, 6-beam expanding collimating lens, 7-radiating fin and 8-convection fan.

Detailed Description

The invention will be further described with reference to the accompanying drawings.

A high-power short-wave semiconductor laser illuminator comprises M driving power supplies 1, M radiating fins 7, N short-wave semiconductor lasers 2, N laser output optical fibers 3, a coupler 4, an illumination output optical fiber 5, a beam expanding collimating lens 6 and a convection fan 8, wherein N is more than or equal to 2, and M is more than or equal to 1; the N short-wave semiconductor lasers 2 are divided into M groups; each radiating fin 7 is provided with a driving power supply 1 and a group of short-wave semiconductor lasers 2 powered by the driving power supply 1; the output ends of the N short-wave semiconductor lasers 2 are connected with the input end of a coupler 4 through N laser output optical fibers 3, and the N laser output optical fibers 3 at the input end of the coupler 4 are arranged in a central symmetry mode (as shown in figure 2); the coupler 4 is connected with the beam expanding collimating lens 6 through the illumination output optical fiber 5, the illumination output optical fiber 5 is connected to the focal plane position of the beam expanding collimating lens 6 through the SMA connector, and the coupled light enters the thicker illumination output optical fiber 5; all the laser output fibers 3 on each radiating fin 7 are arranged in a coiling manner, and the coiling radius is larger than or equal to the turning radius of the laser output fibers 3; the illumination output optical fiber 5 is arranged in a coiling manner, and the coiling radius is larger than or equal to the turning radius of the illumination output optical fiber 5; the length of the illumination output optical fiber 5 is more than or equal to 200mm, so that the length of the optical fiber is enough to homogenize the input light; the M radiating fins 7 are arranged in parallel and in a clearance mode; the convection fan 8 is arranged on one side of the M radiating fins 7 and is used for the convection heat dissipation of the M radiating fins 7; the heat radiating fins 7 are made of metal materials (such as copper and aluminum) with good heat conduction, the heat radiating fins 7 and the convection fan 8 are configured to cool and radiate the driving power supply 1 and the short-wave semiconductor laser 2, and the heat radiating effect is improved in an air convection mode. The high-power short-wave semiconductor laser illuminator can realize the laser illumination function of short wave not less than 30W power and several kilometers. The beam expanding collimating lens 6 can be in a fixed focal length mode and an adjustable focusing mode, the size of a fixed focal length light spot is unchanged, the size of the light spot can be adjusted according to a control instruction in the focusing mode, output light rays are shaped, and the size of the light spot is adjusted according to actual requirements. The high-power short-wave semiconductor laser illuminator provided by the invention is mainly used for 1550nm waveband, but not limited to the waveband.