A two-dimensional spectrum synthesis device

Abstract

The invention belongs to the field of lasers. The invention discloses a two-dimensional spectrum synthesis device, which includes: a two-dimensional optical fiber light source array arranged in sequence along the propagation direction of the optical path, a high linear density multilayer dielectric film grating I, a high linear density multilayer Dielectric film grating II, low linear density multilayer dielectric film grating I and low linear density multilayer dielectric film grating II. The two-dimensional spectrum synthesis device provided by the present invention can reduce the demand for optical elements with large aperture and large aspect ratio during the spectrum synthesis of multi-path sub-light sources, reduce the volume of the synthesis device, reduce the cost of the synthesis device, and achieve higher power The spectral synthesis output provides the possibility for the wide application of the spectral synthesis device.

Description

technical field [0001] The invention belongs to the field of lasers, in particular to a two-dimensional spectrum synthesis device. Background technique [0002] Laser light sources with high beam quality and high average power have important application prospects in the fields of industrial production and equipment manufacturing. When the laser light source is used in the field of laser cutting, the laser light source with higher average power and better beam quality means faster cutting speed and thicker cutting ability, but it is limited by nonlinear effects and mode instability , the output power of a single-fiber single-mode laser has an upper limit. In order to achieve a higher power source output, a beam combiner is usually used to couple the outputs of multiple fiber lasers, but this coupling method leads to poor quality of the synthesized laser beam. (M 2 ≥15), limiting the use of high-power lasers. [0003] Spectral synthesis technology is another technology to a...

AI Technical Summary

Problems solved by technology

The light source of the existing spectrum synthesis device is a one-dimensional light source array, but limited by the processing capability and size of the optical element (such as the aperture of the beam expander system, the aperture of the multilayer dielectric film grating, etc.), the one-dimensional light source is used When performing spectral synthesis, there is an upper limit on the number of sub-beams to be synthesized, which means that the spectral combination device using a one-dimensional light source cannot achieve the expansion of spectral synthesis of more laser sub-beams, and it also means that using a one-dimensional light source There is also an upper limit for increasing the output laser power of the spectral beam combining device

In addition, when the one-dimensional light source is used for beam combining, due to the low utilization rate of the optical components and the irregular structure, it not only increases the processing difficulty of the optical components, but also increases the number of sub-beams of the light source, resulting in a large volume of the entire combining device. Heavy quality and high cost will severely limit the application of spectral synthesis devices

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