All-solid-state ultraviolet lasers are widely used in the fields of mechanical flaw detection, lithography, micromachining and drugs for some great benefits of compact quantity, prolonged daily life, substantial efficiency, great beam high-quality, broad tuning and slender spectral line, etc. Making use of superior electrical power close to-infrared coherent light supply as the elemental frequency supply based upon nonlinear tuning technological know-how, making ultraviolet coherent radiation by multistage frequency conversion is considered a significant solution to create the ultraviolet coherent light-weight supply.
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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 is usually a superb nonlinear crystal which is always placed on the SHG in the NIR into the eco-friendly. The DUV laser will likely be realized by two phases of SFG during the LBO crystals considering that there is no stage-matching angle for LBO to convert the eco-friendly laser at 515 nm or 532 nm on the DUV specifically by SHG [16]. Recently, the NSBBF crystal has also demonstrated its possible to acquire a large conversion efficiency from 532 nm to 266 nm. The walk-off angle and deff from the NSBBF are Nearly similar to These of CLBO [seventeen].
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The pulse duration of the second Stokes gentle was shortened to five ns as proven in Figure 7a, just one-shot photograph in the oscilloscope, which can be a common phenomenon in Raman laser [forty four] when the heart beat length of the pump laser was ten ns.
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Its UV absorption edge reaches a hundred and eighty nm. The helpful nonlinear optical coefficient of CLBO for frequency doubling at 1064nm is about two times as huge as that of KDP. CLBO crystals may be developed through the stoichiometric melt with lessen viscosity.
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