RU2677489C1 - Semiconductor multichannel laser emitter - Google Patents

Abstract

FIELD: laser engineering.

SUBSTANCE: invention relates to the field of laser technology and relates to a semiconductor multichannel laser emitter. Semiconductor multichannel laser emitter includes a housing, active elements and batteries. As active elements laser diode modules are used, made with the possibility of changing the power of each module from 0 to 125 W in real time during laser operation.

EFFECT: technical result consists in providing the possibility of processing parts of high complexity, eliminating the loss of radiation delivered, ensuring uniform distribution of the radiation energy over the entire spot density during any manipulations with it, providing the possibility of regulating and controlling power in real time, increasing the efficiency of the laser, simplifying the repair and replacement of failed units.

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Description

The invention relates to the field of quantum electronics, in particular to laser technology with the creation of a multi-channel laser diode system. This system is a new type of laser emitter and can be used in the development of special-purpose laser systems (cutting, welding, surfacing, etc.).

A new type of laser emitter is based on the multi-channel principle of laser construction. In accordance with this principle, the laser is “assembled” in the form of a lattice of identical laser modules, in each of which laser generation occurs. Such a system forms an optical source with a composite aperture, in which the output radiation is a set of emissions of individual lasers. The small cross-section of the channels makes it possible to efficiently and simply pump energy into the active medium and remove heat from its volume. Radiation is transmitted from each laser module through a separate fiber, which ultimately forms into a multi-fiber system, the layout and number of fibers of which depends on the technical requirements for installation.

A known unit for generating radiation of a multi-channel laser [1], in which the laser housing has a cylindrical shape and is made of electrical insulation material, gas discharge tubes in a packet are arranged in a row in the diagonal plane of the housing at equal distances from each other, the separators are fastened by longitudinal mounting tubes made of of the same material as gas discharge pipes and two symmetrical closed circuits forming on both sides of the gas discharge tube package, the outer branches of which form a cylindrical the surface is concentric to the casing, and the internal branches are located in planes parallel to the plane of the package of gas discharge pipes, the windows in the separators for the flow of coolant are located inside one of the circuits formed by the fixing pipes, two longitudinal tires for supplying high alternating voltage connected to the separators are inserted inside the fixing pipes and brought out of the housing; the optical cavity tightening rods are located outside the housing, and the sealed cavity for pumping coolant is formed by the inner walls of the housing and the outer walls of the pipes. Options are possible.

Also known block radiation generation of a multi-channel laser [2]. In this invention, the multichannel laser radiation generation unit consists of active elements located around the circumference at an equal distance from each other, alternately emitting generation, and a system of rotary mirrors, at least one of which, located along the axis, rotates and alternately collects in one direction radiation from all active elements.

A device for hardening the surface of a part [3] is known, which comprises a laser emitter with radiating tubes arranged in the form of a packet of several rows one inside the other, the packet consists of four rows of tubes, four octahedrons inserted inside one another around the central axis, the octahedron of the second the rows are rotated around the central axis relative to the outer octahedron of the first row so that its vertices are approximately opposite the centers of the faces of the outer octahedron, and the octahedron is the third of the first row are rotated around the central axis relative to the octahedron of the second row so that its vertices are approximately opposite the centers of the faces of the second octahedron and, accordingly, approximately opposite the vertices of the external octahedron, and the fourth octahedron is rotated around the central axis so that its vertices are located approximately between the vertices of the second and third octahedron.

For the prototype, the MTL-500 multichannel technological laser was selected, one of a series of lasers of this type developed at the Shatura Scientific Research Center for Technological Lasers of the Russian Academy of Sciences [4], in which circular waveguide CO2 lasers were used. The active medium is pumped by a discharge in an alternating electric field, which is created by electrodes - plates on the outer surface of the quartz tubes of the channels. The cooling of the tubes in this laser model with a power of 500 W air, in lasers with a power of 1; 2.5; 4 kW - oil. Powerful laser radiation at a wavelength of λ = 10.6 μm, invisible to the human eye, causes a bright luminous spot on an ordinary brick. Several-kilowatt multi-channel CO2 technological lasers are used for thermal hardening and hardening of the working surfaces of machines and mechanisms, for example, wheel rims of railway cars.

The disadvantage of this solution when creating a laser is the high complexity of the work and the large time required for installation, repair and replacement of each laser tube when connecting an optical fiber and putting it into a common braid.

The technical result of the claimed invention is the expansion of the line of laser systems of various capacities for various technological problems by creating a new design of the laser emitter.

The objective of the invention is to create a new design of a laser emitter based on semiconductor laser diodes, for collecting and delivering laser radiation to the surface of the workpiece without loss, while ensuring uniform distribution of energy over the entire area of the light spot during any manipulation with it.

The problem is solved in that in a semiconductor multichannel laser emitter containing a housing, active elements, batteries, laser diode modules are used as active elements, configured to change the power of each module from 0 to 125 W in real time during laser operation .

The radiation is transmitted from each laser module through a multi-fiber system, the layout and quantity of which depends on the technological requirements of the invention.

Thus, due to the "type-setting" design of the emitter of the claimed invention, it is possible to create a laser for any purpose and almost any power, with the ability to control its parameters in real time.

Since the source of the claimed invention is diode, in comparison with the prototype, this means that its efficiency (about 35%) is several times higher than that of CO2 emitter (about 10%). and in the absence of a monolithic radiator, its repair and replacement of failed blocks is not a problem.

In addition, the obvious advantages of the claimed device is the modular layout of the emitter instead of monolithic, which allows, in the event of failure of any module, simply replace the failed assembly without disassembling a single design, and not waste time on repairs.

Thanks to the regulation and control of the radiation power of the laser module in real time, it is possible to process parts of the highest complexity, unique, which do not have other alternative processing methods.

An example of the main characteristics of the emitter in the composition of 40 laser diode modules:

The invention is illustrated by the illustrations:

FIG. 1 is a design diagram of a semiconductor multi-channel laser emitter (for example, a 40-module emitter);

FIG. 2 is an example of a power control interface (using 40 laser modules as an example).

A semiconductor multichannel laser emitter comprises a housing (1) in which active elements are located. As the active elements used laser modules (2), placed evenly on the lower part of the laser housing, in the upper part of the housing are the power supplies of the laser modules (3). For ease of movement in space, the laser is equipped with swivel wheels (4). Also, an exhaust ventilation system and a connector for connecting optical fibers are installed at the rear of the laser. On the front of the laser there is a touch control panel, color indicators for laser operation, an emergency shutdown button.

Thus, the implementation of the invention solves all the tasks posed by the author.

Information sources:

1. RU, 2108647, H01S 3/03;

2. RU, 2107976, H01S 3/02;

3. RU, 2580350, C21D 1/09, publ. 04/10/16.

4. http://www.nsu.ru/srd/lls/pdfs/lasern_reshetki.pdf - prototype

Claims (1)

A semiconductor multichannel laser emitter comprising a housing, active elements, power cells, characterized in that laser diode modules are used as active elements, configured to change the power of each module from 0 to 125 W in real time during laser operation.

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