Quasi-continuous two-bar series inner cavity frequency multiflier high power green laser of 200 vatts grade

Abstract

The invention relates to a 200 kilowatt-classed quasi-continuous frequency-doubled high-power green laser with two rods series connected with intracavity. It adopts the side-pumped Nd: YAG crystals of the same type of diode laser pumped component controlled by the same driver. It forms a stable 1064-based depolarized fundamental radiation in the folded resonator designed through the optimization of computer's simulation. It eventually achieves a 203.5W output of 532nm green laser with a conversion efficiency of 72.7% through the double-frequency by HGTR - KTP crystals, and dual acousto-optic Q technology and thermally-induced birefringence compensation technology.

Description

technical field [0001] The invention belongs to the field of laser technology, and in particular relates to a high-power green laser with 200-watt-level quasi-continuous double rods connected in series to an inner cavity for frequency doubling and dual acousto-optic Q-switching. Background technique [0002] Since the first ruby ​​laser came out in the 1960s, all kinds of lasers and laser technology have developed extremely rapidly, especially the development of high-power all-solid-state solid-state lasers is particularly eye-catching, with its large output energy, high peak power, and higher than CO 2 Gas lasers are widely used in laser medicine, laser material processing, optical storage, laser full-color display, scientific research, communication, national defense, entertainment and other fields due to their short wavelength, reliable operation, and long service life. At present, multi-rod cascading technology is the main method to increase the output power of all-solid...

AI Technical Summary

Problems solved by technology

On the one hand, the pumping source in the above technology adopts the form of lamp pumping, which has disadvantages such as low pumping efficiency, obvious thermal lens effect, and unstable output power, which is very unfavorable for the practical application of lasers; on the other hand, the resonator adopts Compared with the folded cavity structure, the two-mirror straight cavity structure has poor beam quality. Without inserting the second harmonic reflector, it can only correct the second harmonic generated by the fundamental frequency light passing through the frequency doubling crystal once. Wave to achieve effective output, which limits the further improvement of its light-to-light conversion efficiency and output power, which is not conducive to industrialization

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