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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。

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LBO can also be an outstanding nonlinear crystal which is usually placed on the SHG from the NIR towards the inexperienced. The DUV laser will likely be understood by two levels of SFG within the LBO crystals given that there isn't a phase-matching angle for LBO to convert the green laser at 515 nm or 532 nm into the DUV directly by SHG [16]. Recently, the NSBBF crystal has also shown its prospective to obtain a large conversion efficiency from 532 nm to 266 nm. The walk-off angle and deff from the NSBBF are Nearly much like those of CLBO [seventeen].

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Additionally, combining the stable-condition laser with other nonlinear process for instance stimulated Raman scattering, NIR lasers can be accomplished at new wavelengths with substantial ability and higher beam good quality, which was examined because of the evidence-of-basic principle experiment. This Raman laser plan delivers a completely new path to the significant-ability DUV laser, especially in the wavelength of 193 nm.

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The conversion effectiveness from essential NIR to DUV is from 5% to 36% in accordance with the documented results in Desk one. Rising the conversion performance will decrease the stress on the design and setup of the elemental laser amplifier in addition to the electric powered energy usage. A very good beam high quality of the basic laser can even add towards the escalating with the conversion performance as well as the appropriate electrical power intensity in the NIR and eco-friendly laser in the SHG and FHG approach, respectively. The very best conversion efficiencies from NIR to inexperienced and eco-friendly to DUV laser by use of CLBO crystal are 70% and about 50%, respectively [twelve], which corresponds to your conversion effectiveness of 35% from basic to DUV.

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