All-strong-state ultraviolet lasers happen to be extensively used in the fields of mechanical flaw detection, lithography, micromachining and medicine for the advantages of smaller volume, lengthy existence, high efficiency, very good beam excellent, broad tuning and narrow spectral line, etcetera. Employing substantial electricity around-infrared coherent light-weight source as the elemental frequency supply determined by nonlinear tuning know-how, producing ultraviolet coherent radiation by multistage frequency conversion is viewed as a significant technique to build the ultraviolet coherent light-weight source.
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We summarized The existing growth status of your substantial-electrical power DUV laser both of those within the wavelength of FHG in the one-μm laser and at 193 nm. The latest development with the sound-point out/fiber laser, in addition to the nonlinear optical crystals, prompts don't just the common electric power but also the beam good quality (coherence) of the DUV lasers to an unparalleled level.
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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Both the 1040 nm and 1078 nm laser originate from 1 twin-wavelength Yb-doped fiber laser. Just about every laser is amplified by levels of fiber amplifier and Yb-doped materials amplifier, respectively.
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Cesium Lithium Borate (CsLiB6O10 or CLBO) is the simplest non-linear crystal which generates ultraviolet harmonics of your Nd:YAG elementary laser wavelength. As a way to enrich the hurt threshold, lower CLBO area roughness, by extremely-precision machining, is necessary. Since the CLBO crystal has effortless hydroscopic reaction and micro scratches in machining, ultra-exact machining of your more info CLBO crystal is often a difficult technological challenge.
The beam profile proven in Figure 7b shown a great beam quality as among the list of merits of Raman laser, which would be advantageous to produce a 193-nm DUV laser with a high quality beam.
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 with the stoichiometric melt with lower viscosity.
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