Common-aperture lath amplification laser incoherent synthesis device

Abstract

A common-aperture lath amplification laser incoherent synthesis device comprises a seed laser source (1), a light beam coupling alignment module (2), a lath laser gain module (3), a light beam opticalconversion module (4) and a diffraction optical element (5), which are sequentially arranged along a light path. According to the device, seed laser beams with various wavelengths emitted by the seedlaser source (1) are inputted into the lath laser gain module (3) through the light beam coupling alignment module (2) for laser amplification; and the amplified laser beams with various wavelengthsenter the diffraction optical element (5) through the light beam optical conversion module (4) for combination, so that the common-aperture and collinear output of the amplified incoherent synthetic laser is realized. The lath laser gain module (3) is adopted, and the gain narrowing effect of the lath laser gain module (3) can compress the laser line width in the laser amplification process to compress light beam quality degradation after beam combination. Moreover, the laser amplification process is basically not affected by the nonlinear effect, and the laser power is greatly improved.

Description

technical field [0001] The invention relates to the field of lasers, in particular to a common-aperture slab amplified laser incoherent combining device. Background technique [0002] At present, combining multiple laser beams into one beam is an important method to obtain high-power and high-beam-quality lasers. The idea is to combine multiple high-beam-quality sub-lasers to finally achieve high beam quality and high-power output. The main implementation methods include coherent combining and non-coherent combining. Incoherent synthesis, each sub-laser unit can be adjusted independently without controlling its phase, polarization state and other parameters, and can achieve incoherent power scaling and amplification, so it has greater research value and application prospects. [0003] Among them, spectral synthesis technology, as a typical incoherent synthesis technology, uses spectral synthesis devices (such as gratings, prisms, etc.) to achieve collinear synthesis of sub-...

AI Technical Summary

Problems solved by technology

However, in the process of beam combining, each single fiber sub-laser is affected by the nonlinear effect of the gain medium, so the power level of the single fiber cannot be further broken through, resulting in a certain limit to the overall output power after combining

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