All-sound-condition ultraviolet lasers are extensively Utilized in the fields of mechanical flaw detection, lithography, micromachining and drugs for the advantages of modest quantity, lengthy life, substantial performance, good beam high-quality, extensive tuning and slim spectral line, and many others. Making use of substantial electric power in the vicinity of-infrared coherent light-weight source as the elemental frequency source depending on nonlinear tuning technological innovation, making ultraviolet coherent radiation by multistage frequency conversion is considered a very important approach to build the ultraviolet coherent light-weight 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。

On the other hand, the beam quality of this bigger power DUV laser would develop into worse because of a lot more significant thermal and nonlinear consequences. Consequently, the frequency conversion procedures should be cautiously built to mitigate the aforementioned effects. Thus, a substantial-electric power DUV laser in the FHG of 1 μm with a very good beam high quality can be obtained and may be effective for acquiring the shorter wavelength DUV lasers such as 193 nm by SFG.

Due to the thermal lens outcome in the sound-point out lasers, In case the heating administration is inadequate, It's not at all easy to get the solid-point out laser by using a high electric power as well as a significant beam excellent at the same time. Just lately, with the event of the thin disk laser and solitary-crystal fiber (SCF) laser, a higher-power laser at the basic wavelength (1 μm) were realized with a superb beam excellent Despite a TEM00 mode beam [4,24], which might be fantastic candidates for the fundamental with the DUV laser generation. One more prospect for the elemental is the superior-electric power fiber laser which may be reached by coherent beam combination with M2 benefit less than one.

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The heartbeat period of the next Stokes mild was shortened to five ns as revealed in Determine 7a, only one-shot photograph with the oscilloscope, which happens to be a standard phenomenon in Raman laser [forty four] when the heart beat length on the pump laser was 10 ns.

Cesium Lithium Borate (CsLiB6O10 or CLBO) is the most effective non-linear crystal which generates ultraviolet harmonics on the Nd:YAG basic laser wavelength. In order to increase the damage threshold, minimal CLBO floor roughness, by extremely-precision machining, is necessary. As the CLBO crystal has simple hydroscopic response and micro scratches in machining, extremely-specific machining of your CLBO crystal is really a tricky technological problem.

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Its UV absorption edge reaches 180 nm. The powerful nonlinear optical coefficient of CLBO for frequency doubling at 1064nm is about 2 times as substantial as that of KDP. CLBO crystals could be developed with the stoichiometric melt with decreased viscosity.

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