All-solid-condition ultraviolet lasers happen to be commonly Utilized in the fields of mechanical flaw detection, lithography, micromachining and medicine for some great benefits of modest quantity, lengthy everyday living, substantial performance, excellent beam high-quality, vast tuning and slender spectral line, etc. Making use of superior energy in close proximity to-infrared coherent mild resource as the basic frequency supply based on nonlinear tuning technological innovation, building ultraviolet coherent radiation by multistage frequency conversion is regarded as a very important approach to acquire the ultraviolet coherent light-weight source.

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We summarized The existing advancement standing with the large-electricity DUV laser both equally on the wavelength of FHG in the one-μm laser and at 193 nm. The the latest progress in the good-point out/fiber laser, as well as the nonlinear optical crystals, prompts don't just the typical electricity and also the beam excellent (coherence) with the DUV lasers to an unparalleled stage.

全固态紫外激光器以其体积小、寿命长、效率高、光束质量好、调谐范围宽、谱线窄等优点，广泛应用于机械探伤、光刻、微加工和医学等领域，等，利用大功率近红外相干光源作为基于非线性调谐技术的基频源，通过多级变频产生紫外相干辐射被认为是发展紫外相干光源的重要途径。紫外相干光源的关键问题是研制紫外波段的非线性光学变频晶体。非线性光学晶体是实现频率变换的条件之一，因此对非线性光学晶体的生长、尺寸、损伤电阻、转换效率和允许的参数范围提出了越来越高的要求。

Then again, the beam excellent of the bigger power DUV laser would grow to be worse on account of far more really serious thermal and nonlinear consequences. As a result, the frequency conversion procedures need to be diligently meant to mitigate the aforementioned consequences. Consequently, a significant-electric power DUV laser for the FHG of one μm with a great beam high-quality can be received and will be beneficial for getting the shorter wavelength DUV lasers such as 193 nm by SFG.

Both the 1040 nm and 1078 nm laser originate from 1 twin-wavelength Yb-doped fiber laser. Every single laser is amplified by stages of fiber amplifier and Yb-doped products amplifier, respectively.

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Moreover, combining the solid-point out laser with other nonlinear approach including stimulated Raman scattering, NIR lasers could be more info realized at new wavelengths with substantial electricity and significant beam good quality, which was examined via the proof-of-theory experiment. This Raman laser plan delivers a new route to the superior-electricity DUV laser, Specifically at the wavelength of 193 nm.

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The conversion performance from essential NIR to DUV is from 5% to 36% in accordance with the documented results in Desk 1. Expanding the conversion efficiency will reduce the stress on the look and setup of the basic laser amplifier along with the electric powered energy intake. A great beam excellent of the fundamental laser will even add towards the raising of the conversion efficiency along with the suitable electrical power intensity from the NIR and eco-friendly laser inside the SHG and FHG approach, respectively. The highest conversion efficiencies from NIR to green and environmentally friendly to DUV laser by utilization of CLBO crystal are 70% and all around fifty%, respectively [twelve], which corresponds on the conversion efficiency of 35% from fundamental to DUV.

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