CLBO Crystal - An Overview
CLBO Crystal - An Overview
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Nevertheless, in order to system the crystal is rather Innovative manufacturing approaches are necessary. For the reason that dawn of this crystal, engaged on this problem, we at the moment are the sole enterprise on earth which might be processed On this crystal.
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Based on the proof-of-basic principle experiment, the conversion efficiency of 23% implied the potential of obtaining superior-power at the second Stokes wavelength in the Raman laser. In case the pump laser of 1078 nm can be acquired at the common power of fifty W, the output ability of its 2nd Stokes wavelength at 1512 nm could be more than ten W. The design of your Raman laser cavity ought to be optimized to be able to steer clear of the injury from the M1 and diamond area.
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。
However, the beam quality of this higher electric power DUV laser would become worse as a result of far more really serious thermal and nonlinear outcomes. For this reason, the frequency conversion processes must be very carefully designed to mitigate the aforementioned effects. So, a significant-electric power DUV laser with the FHG of 1 μm with a very good beam excellent may be obtained and can be advantageous for getting the shorter wavelength DUV lasers including 193 nm by SFG.
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During the scientific and industrial apps, the beam top quality in the DUV laser is additionally a vital parameter. Particularly, the beam high-quality with the DUV laser substantially impacts the laser machining results. The beam high-quality on the DUV laser is determined by that of the elemental laser and the crystal with the frequency conversion. Just lately, a higher-ability DUV laser (>10 W) at 258 nm was claimed by using a beam quality of M2 < 1.5, which was produced by FHG of the Yb:YAG laser at 1030 nm using the CLBO crystal [13]. This more info laser would bring on a greater laser machining end result in comparison to the previous DUV lasers with bigger M2.
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Cesium Lithium Borate (CsLiB6O10 or CLBO) is the most effective non-linear crystal which generates ultraviolet harmonics of the Nd:YAG fundamental laser wavelength. To be able to improve the hurt threshold, very low CLBO surface area roughness, by ultra-precision machining, is necessary. As the CLBO crystal has effortless hydroscopic reaction and micro scratches in machining, extremely-specific machining with the CLBO crystal can be a challenging technical trouble.
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The conversion effectiveness from fundamental NIR to DUV is from five% to 36% according to the described leads to Desk 1. Raising the conversion efficiency will decrease the stress on the design and set up of the elemental laser amplifier plus the electric ability usage. A good beam good quality of the elemental laser may also lead to your increasing in the conversion effectiveness together with the right power intensity from the NIR and eco-friendly laser while in the SHG and FHG course of action, respectively. The best conversion efficiencies from NIR to environmentally friendly and environmentally friendly to DUV laser by usage of CLBO crystal are 70% and all over fifty%, respectively [12], which corresponds towards the conversion efficiency of 35% from essential to DUV.
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