All-good-state ultraviolet lasers have already been commonly Employed in the fields of mechanical flaw detection, lithography, micromachining and medication for some great benefits of modest volume, very long everyday living, substantial performance, fantastic beam excellent, vast tuning and slim spectral line, etcetera. Employing significant electricity around-infrared coherent light supply as the fundamental frequency source according to nonlinear tuning technological innovation, generating ultraviolet coherent radiation by multistage frequency conversion is regarded as a significant technique to produce the ultraviolet coherent mild 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。
Conversely, the beam excellent of this larger power DUV laser would turn out to be even worse because of additional severe thermal and nonlinear effects. For this reason, the frequency conversion processes must be diligently made to mitigate the aforementioned effects. Thus, a substantial-energy DUV laser on the FHG of 1 μm with an excellent beam good quality may be received and can be helpful for obtaining the shorter wavelength DUV lasers like 193 nm by SFG.
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Cesium Lithium Borate (CsLiB6O10 or CLBO) is the simplest non-linear crystal which generates ultraviolet harmonics from the Nd:YAG fundamental laser wavelength. So as to increase the injury threshold, low CLBO floor roughness, by ultra-precision machining, is necessary. Because the CLBO crystal has quick hydroscopic reaction and micro scratches in machining, extremely-precise machining with the CLBO crystal is actually a tricky specialized trouble.
The beam profile revealed in Determine 7b shown an excellent beam excellent as one of the deserves of Raman laser, which might be useful to make a 193-nm DUV laser with a high quality beam.
Its UV absorption edge reaches a hundred and eighty nm. The click here powerful nonlinear optical coefficient of CLBO for frequency doubling at 1064nm is about twice as large as that of KDP. CLBO crystals is usually grown in the stoichiometric soften with reduced viscosity.
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