The Ultimate Guide To CLBO Crystal
The Ultimate Guide To CLBO Crystal
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All-good-point out ultraviolet lasers have been widely Employed in the fields of mechanical flaw detection, lithography, micromachining and drugs for the benefits of modest volume, prolonged lifetime, significant effectiveness, excellent beam top quality, broad tuning and slender spectral line, and so forth. Using high electric power in close proximity to-infrared coherent light resource as the basic frequency resource based upon nonlinear tuning know-how, producing ultraviolet coherent radiation by multistage frequency conversion is considered to be a vital approach to acquire the ultraviolet coherent gentle source.
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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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On the other aspect, the facility scaling of the NIR laser is another part to raise the normal electricity of your 193-nm DUV laser. Because of the not enough the substantial-electric power amplification Resolution in the NIR laser (for instance at 1553 nm), nonlinear frequency procedures like optical parameter oscillation (OPO) can be applied to produce a wavelength converter by shifting the wavelength from one μm to the desired wavelength together with obtaining relative better electrical power [21]. A short while ago, a diamond Raman laser confirmed its capability in accomplishing a high electricity along with a substantial conversion performance at the 1st Stokes in the 1-μm laser [22,23], which suggests the chance to get used within the 193-nm DUV laser generation due to its higher Raman acquire and enormous frequency change.
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The pulse period of the second Stokes mild was shortened to 5 ns as revealed in Determine 7a, just one-shot picture from your oscilloscope, that is a typical phenomenon in Raman laser [forty four] although the heart beat duration on the pump laser was ten ns.
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The conversion effectiveness from essential NIR to DUV is from five% to 36% according to the claimed ends in Desk 1. Raising the conversion efficiency will decrease the burden on the design and set up of the fundamental laser amplifier together with the electric electricity use. A very good beam high quality of the basic laser will likely contribute for the increasing in the conversion effectiveness and the right energy intensity from the NIR and eco-friendly laser within the SHG and FHG method, respectively. The very best conversion efficiencies from NIR to eco-friendly 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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