TWM641442U - High Power Semiconductor Laser System - Google Patents

Abstract

A high-power semiconductor laser system, including complex groups of high-brightness blue-ray laser modules, one In addition, the high-brightness blue-ray laser module has more than 7 blue-ray laser diodes to excite the blue-ray beam , and through the effects of fast axis, slow axis collimating mirrors, reflectors and focusing mirrors, the individual blue light beams are collimated, combined and coupled into the blue optical fiber to emit a blue laser beam; a fiber combiner, Its input end is embedded in the complex array of blue optical fibers, and its output end is embedded in an output optical fiber; wherein, the fiber beam combiner combines the blue laser beams emitted by the complex array of blue optical fibers into an output beam, and couples it to the output In the fiber core of the optical fiber, and the BPP (beam parameter product) of the output beam will be between 20~50 mm x mrad, and the power will reach between 200~1500W; compared with other optical fiber combining or space combining Beam laser system can achieve better beam quality and has the advantages of excellent mechanical stability.

Description

High Power Semiconductor Laser System

This work is related to a laser system, especially a high-power semiconductor laser system that uses an optical fiber combiner to combine multiple groups of high-brightness blue-ray laser modules, and thereby produces a hundred-watt-level blue-ray laser output.

Press, semiconductor lasers have always had problems such as poor beam quality and limited output power of a single resonator; therefore, in order to obtain greater laser power and maintain beam quality, it is necessary to rely on high-density beam combining technology. The previous high-brightness module technology created by the author is to use 6~8 5W lasers to combine high-density beams in space, so as to achieve a blue-ray laser module with a power of 30W and a BPP of 6 mm x mrad; However, if this technology is to be expanded to more than 100W, the optical mechanism will be too large and the mechanism is too complicated, especially the method of high-density spatial beam combining is very easy to be mechanically deformed, resulting in poor stability. Therefore, it should be a relatively simple and feasible solution to replace spatial beam combining with optical fiber beam combining to increase the blue laser to more than 100W.

Click once, the quality status of the general laser beam can be multiplied by the beam parameter beam parameter ter product (BPP), where the value of BPP is obtained by the product of the divergence angle α of the laser beam and the radius R of the narrowest point of the laser beam; therefore, the value of BPP can not only quantify the quality of the laser beam, but also It is also a measure of how well the laser beam is focused to a small spot.

Traditionally, fiber combining has been widely used in high-power infrared lasers, but its output BPP is usually very high. For example, the BPP of the output fiber of the beam combiner used in general infrared semiconductor lasers is greater than 90 mm x mrad , and the optical fiber used in the general beam combiner has a considerable attenuation in the blue light band, and the absorption rate is usually as high as 45dB/Km. This phenomenon will waste a lot of precious laser energy and reduce the energy conversion efficiency of the overall laser system.

Therefore, how to use the technology of fiber optic beam combining to develop a blue-ray laser with hundreds of watts of power and a lower BPP value has become a topic that the creators have to actively think about.

The reason is that the main purpose of this creation is to provide a high-power semiconductor that uses optical fiber combining to combine multiple groups of high-brightness blue-ray laser modules, and to generate hundreds of watts of power and lower BPP value blue-ray laser output. laser system.

In order to achieve the above purpose, the means adopted in this creation include multiple sets of high-brightness blue-ray laser modules, which emit multiple sets of blue-ray laser beams through corresponding sets of blue-ray optical fibers; an optical fiber combiner, whose The input end is embedded with the plurality of sets of blue-ray optical fibers, and the output end is embedded with an output optical fiber; wherein, the optical fiber combiner combines the plurality of sets of blue-ray laser beams emitted by the plurality of sets of blue-ray optical fibers into an output beam, and couples it to the In the core of the output optical fiber, and the BPP (beam parameter product) of the output beam is between 20-50 mm x mrad, the power can reach between 200-1500W.

According to the characteristics disclosed above, the individual high-brightness blue laser modules in this invention have at least 7 blue laser diodes to individually excite a blue light beam with a wavelength of 400nm~670nm, and at least 7 fast axes The collimating mirror, the slow axis collimating mirror and the reflecting mirror are individually and sequentially placed on the optical path of the blue light beam, so that the individual blue light beam passes through each of the fast axis collimating mirrors and each of the slow axis collimating mirrors respectively collimates Straight, and then reflected by each of the mirrors, and then merged into the blue laser beam in space; and a focusing mirror, used to couple the blue laser beam to the core of the blue optical fiber.

According to the characteristics disclosed above, the wavelength of the blue laser beam in this creation will be between 360nm ~ 530nm, the power can reach 30W, and the BPP (beam parameter product) can reach 6 mm x mrad.

According to the features disclosed above, the input end of the fiber combiner in this creation is embedded with 7 to 19 groups of blue optical fibers.

According to the characteristics disclosed above, the output fiber in this invention has a core with a diameter of 100 μm and a cladding with a diameter of 300 μm.

With the help of the previously disclosed features, this creation "high-power semiconductor laser system" has the following benefits: (1) In this creation, complex groups of high-brightness blue laser modules are used as the light beams of combined beams source, wherein, individual high-brightness blue-ray laser modules have at least seven or more blue-ray lasers Polar body, to excite a blue light beam with a wavelength of 400nm~670nm, and collide through the fast axis and slow axis The functions of straight mirror, reflecting mirror and focusing mirror make the individual blue light beams collimate, merge and couple into the blue optical fiber to emit a blue laser beam; and the wavelength of the individual blue laser beam will be between 360nm~530nm, power up to 30W, and BPP (beam parameter product) value up to 6 mm x mrad. (2) This creation uses a fiber optic combiner to embed 7 to 19 groups of blue optical fibers to make it emit The blue laser beams are combined into an output beam; and the power of the output beam can reach 200~ Between 1500W, and the BPP (beam parameter product) value will be between 20~50 mm x mrad; and Compared with other fiber-combined or space-combined laser systems, the output beam can achieve better beam quality and has the advantages of excellent mechanical stability.

The implementation of the present invention is described below through specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied by other different specific embodiments, and various modifications and changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

First of all, please refer to FIG. 1 , which is the combined structure of the high-power semiconductor laser system 100 created in this invention, including a complex set of high-brightness blue-ray laser modules 10, which emit light through corresponding sets of blue-ray optical fibers 20. The blue-ray laser light beam L10 of complex group; An optical fiber combiner 30, its input end 31 is embedded in the blue-ray optical fiber 20 of this complex group, and its output end 32 is embedded in an output optical fiber 40; Wherein, this optical fiber combiner 30 is the The multiple sets of blue laser beams L10 emitted by the multiple sets of blue optical fibers 20 are combined into an output beam L30, and coupled into the core of the output optical fiber 40; moreover, the output optical fiber 40 will have a diameter of 100 μm in this creation. The core and the cladding of 300 μm, and the input end 31 of the optical fiber combiner 30 are embedded with 7~19 groups of blue optical fibers 20, and the BPP (beam parameter product) of the output beam L30 will be between 20~50 mm x mrad, its power can reach between 200~1500W.

Shown in Fig. 2～4, it is the structure of high brightness blue light laser module 10 in this creation, it has There are at least 7 blue laser diodes 11 to individually excite a blue light beam L11 with a wavelength of 400nm~670nm, at least 7 fast-axis collimating mirrors 12, slow-axis collimating mirrors 13 and reflective mirrors 14, It is placed on the optical path of the blue light beam L11 in sequence, so that the individual blue light beam L11 is collimated through each of the fast axis collimating mirrors 12 and each of the slow axis collimating mirrors 13, and then through each of the reflecting mirrors 14, and then combined into the blue laser beam L10 in space; In the high-brightness blue-ray laser module 10 in this creation, the horizontal direction between each blue-ray laser diode 11 is close to each other without gaps, as shown in Figure 3, and individual fast-axis collimating mirrors 12. The slow-axis collimating mirror 13 and the reflector 14 can individually adjust the position and angle of the light path state of the blue light beam L11 emitted by the blue laser diode 11; at the same time, they can also be combined for individual blue light beams L11 To achieve the optical path state of the blue laser beam L10, the vertical gap G between the individual blue laser diodes 11 is adjusted to the minimum, as shown in Figure 4; therefore, the high brightness blue laser module 10 in this creation The blue laser beam L10 of the company has a wavelength of 360nm~530nm, a power of 30W, and a BPP (beam parameter product) of 6 mm x mrad.

In the embodiment of this creation, the fiber combining system of 19x1 is adopted, please refer to shown in Fig. 5～6; Show that its input end 31 is embedded in blue light optical fiber 20 of 19 groups in the figure, and output end 32 then is embedded in an output optical fiber 40 ; Wherein, the blue laser beam L10 that 19 groups of blue light optical fibers 20 send is bundled into an output beam L30 in the fiber beam combiner 30, and is coupled in the fiber core of this output optical fiber 40; The BPP (bundle of the output beam L30 Flow parameter product) will be between 20~50 mm x mrad, and the power can reach between 200~1500W. In this invention, the output optical fiber 40 with high OH is further utilized, and the energy efficiency of the output beam L30 can be increased by 5%.

In this creation, complex groups of high-brightness blue-ray laser modules 10 are used as the light beams of combined beams. source, wherein the individual high-brightness blue-ray laser module 10 has at least seven or more blue-ray lasers The polar body 11 is used to excite a blue light beam L11 with a wavelength of 400nm~670nm, and through the effects of the fast axis and slow axis collimating mirrors 12/13, reflecting mirror 14 and focusing mirror 15, the individual blue light beam L11 is collimated , combined and coupled to the blue optical fiber 20 to emit a blue laser beam L10; and the wavelength of the individual blue laser beam L10 will be between 360nm～530nm, the power reaches 30W, and the BPP (beam parameter product) value can reach 6 mm x mrad. Furthermore, the invention uses a fiber combiner 30 to embed 7 to 19 groups of blue optical fibers 20, so that the emitted blue laser beam L10 is combined into an output beam L30; and the power of the output beam L30 can reach more than 200 to 1500W Between, and BPP (beam parameter product) value will be between 20 ~ 50 mm x mrad; and the output beam L30 can achieve better beam quality than other laser systems with optical fiber combining or space combining, and Combined with the advantages of excellent mechanical stability.

To sum up, the structure disclosed in this creation is unprecedented, and it can indeed achieve the improvement of efficacy, and is available for industrial use. It fully meets the requirements of new patents. I pray that the Jun Bureau will grant a patent to encourage innovation. , no sense of morality.

However, the diagrams and descriptions disclosed above are only the preferred embodiments of this creation, and modifications or equivalent changes made by those who are familiar with this art according to the spirit of this case should still be included in the scope of this patent application.

10: High brightness blue laser module 11:Blue laser diode 12: Fast axis collimating mirror 13: Slow axis collimating mirror 14: Mirror 15: Focusing mirror 20: Blu-ray optical fiber 30: Fiber combiner 31: input terminal 32: output terminal 40: output fiber 100: High power semiconductor laser system L10: Blu-ray laser beam L11: Blue light beam L30: output beam G: vertical gap

Figure 1 is a schematic diagram of the combined structure of the high-power semiconductor laser system of this invention. Figure 2 is a schematic diagram of the combined structure of the high-brightness blue-ray laser module in this creation. Figure 3 is the top view of the combined structure of the high-brightness blue-ray laser module in this creation. Figure 4 is a side view of the diode arrangement of the high-brightness blue-ray laser module in this creation. Fig. 5 is the structural cross-sectional view of the input end of the optical fiber combiner in this creation. Fig. 6 is the structural sectional view of the output end of the optical fiber combiner in this creation.

10: High brightness blue laser module

20: Blu-ray optical fiber

30: Fiber combiner

31: input terminal

32: output terminal

40: output fiber

100: High power semiconductor laser system

L10: Blu-ray laser beam

L30: output beam

Claims (5)

A high power semiconductor laser system comprising: Multiple arrays of high-brightness blue-ray laser modules, with corresponding arrays of blue-ray optical fibers, Based on this, complex groups of blue laser beams are emitted; An optical fiber beam combiner, the input end of which is embedded in the complex array of blue optical fibers, and the output end is embedded in An output optical fiber; wherein, the optical fiber combiner is the complex number emitted by the complex group of blue optical fibers A group of blue laser beams are combined into an output beam and coupled into the core of the output fiber, and The BPP (beam parameter product) of the output beam is between 20~50 mm x mrad, and the power can reach Between 200~1500W. The high-power semiconductor laser system as described in Item 1 of the scope of the patent application, wherein each of the high-brightness blue laser modules has at least 7 or more blue laser diodes, which are individually excited with a wavelength of 400nm~ 670nm blue light beam, at least 7 fast-axis collimating mirrors, slow-axis collimating mirrors and reflectors are placed on the optical path of the blue light beam in sequence, so that the individual blue light beams are collimated through the fast axes Mirror, each of the slow-axis collimating mirrors are collimated separately, and then combined into the blue laser beam in space after being reflected by each of the mirrors; and a focusing mirror is used to couple the blue laser beam to the blue light In the core of the optical fiber. As the high-power semiconductor laser system described in item 2 of the scope of patent application, wherein, the blue laser beam has a wavelength between 360nm~530nm, a power of 30W, and a BPP (beam parameter product) of up to 6 mm x mrad. As the high-power semiconductor laser system described in item 1 of the scope of patent application, wherein, the input end of the fiber combiner is embedded with 7 to 19 groups of blue optical fibers. The high-power semiconductor laser system as described in Item 1 of the scope of the patent application, wherein the output fiber has a core with a diameter of 100 μm and a cladding of 300 μm.

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