Laser beam common aperture power synthesizing system based on light beam stable closed-loop control

Abstract

The invention provides a laser beam common aperture power synthesizing system based on light beam stable closed-loop control. Aiming to solve the technical problems, light beam high-precision synthesis is carried out by a light beam stable closed-loop control method aiming to two paths of laser beams with different wavelengths. Two paths of laser respectively pass through respective tilting mirrors and transmission mirrors and the light beam coupling is realized on a synthesizing mirror; meanwhile, appointed error information of each path of the light beam is detected by a synthesizing sensor through a manner of beam splitting and imaging of a dispersion element; the appointed error information of the light beam is converted into driving voltage through calculation and treatment to drive the tilting mirror to carry out angle deflection to eliminate an appointed error of the light beam; finally, high-speed and high-precision synthesis of a plurality of paths of the light beams is realized and the power density of a target point is improved; and the path quantity of the synthesizing light beams can be expanded according to actual requirements. The laser beam common aperture power synthesizing system based on the light beam stable closed-loop control, can be used for fields of material science, nuclear industry, machining, scientific researches and the like, has the advantages of good continuity, high stability and strong anti-interference capability, and is suitable for high-precision incoherent synthesis of a plurality of paths of the light beams under long-time continuous working conditions.

Description

technical field [0001] The invention relates to a high-precision and high-efficiency synthesis system for multiple laser beams with different wavelengths and a common aperture, especially for the synthesis of high-energy lasers with different wavelengths, and belongs to the technical field of optical engineering. Background technique [0002] The application of laser in various fields has high requirements on output power, beam quality and light output time, such as nuclear industry, laser welding, laser cutting, material science and national defense. As far as a single laser beam is concerned, due to technical limitations, it is very difficult to achieve a high output power, and the greater the output power, the worse the beam quality. Therefore, it is particularly important to combine multiple laser beams. [0003] Beam combination is divided into coherent combination and non-coherent combination. Coherent or non-coherent combination can be carried out for multiple laser b...

AI Technical Summary

Problems solved by technology

[0008] The technical problem solved by the present invention is: to overcome the shortcomings of the traditional non-coherent synthesis method, such as low synthesis accuracy, great environmental influence, and application only under static conditions, and provide a high-precision common-aperture method for multiple laser beams with different wavelengths. Combining system, the system has good stability, suitable for stable multi-beam synthesis under static, quasi-static and dynamic conditions, and also has high transmission efficiency

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