Multi-wavelength incoherent spectrum beam-combining lath laser oscillator

Abstract

A multi-wavelength incoherent spectrum beam-combining lath laser oscillator comprises a high-reflection cavity mirror array (1), a lath laser gain module (2), an optical conversion system (3), a diffraction optical element (4) and an output coupling mirror (5), which are sequentially arranged along an optical path. The laser oscillator provided by the invention adopts the solid lath laser gain module to generate a plurality of beams of split-aperture, multi-wavelength and narrow-linewidth laser, and performs external cavity spectrum beam combination of the plurality of beams of laser, so thatgain amplification and incoherent spectrum synthesis of light beams can be realized at the same time. Compared with a spectrum beam combining and amplifying device, the laser oscillator provided by the invention has the advantages that on the one hand, a seed laser source is not needed and the structure is simple; on the other hand, the multiple beams of multi-wavelength laser respectively oscillate in a plurality of independent laser resonant cavities formed by the high-reflection cavity mirror array and the output coupling mirror, the laser beam quality after spectrum beam combination is basically consistent with the beam quality of the single beam of sub-laser, and the high beam quality can be maintained while the power is improved.

Description

technical field [0001] The invention relates to the field of laser technology, in particular to a multi-wavelength incoherent spectrum beam combining slab laser oscillator. Background technique [0002] Spectral synthesis technology, as a typical incoherent synthesis technology, uses diffractive optical devices (such as gratings, prisms, etc.) to achieve collinear synthesis of spatially distributed and arranged sub-laser beams of different wavelengths. Strict control of the phase, polarization, and amplitude of the combined beam can achieve better overlap of the combined beam in the far field and near field, and the beam quality does not deteriorate with the increase in the number of combining units. Compared with single-beam laser, this technology can achieve higher Power, while maintaining high beam quality, is widely used in fiber amplifiers and semiconductor lasers. [0003] Although the grating-external cavity spectral beam combining method solves the problem of poor b...

AI Technical Summary

Problems solved by technology

[0003] Although the grating-external cavity spectral beam combining method solves the problem of poor beam quality of conventional stacked semiconductor laser beam combining, effectively improves the output power and beam quality of semiconductor lasers, and has become the most effective combination of semiconductor lasers to achieve high-brightness laser output. One of the beam technologies, but its output power is still limited by the output power of the semiconductor laser unit itself and the number of combined channels, and further breakthroughs are needed

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