5 Tips about CLBO Crystal You Can Use Today
5 Tips about CLBO Crystal You Can Use Today
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All-solid-condition ultraviolet lasers are actually extensively Utilized in the fields of mechanical flaw detection, lithography, micromachining and medicine for the benefits of compact volume, very long lifestyle, large effectiveness, very good beam high quality, broad tuning and slim spectral line, etc. Employing significant power near-infrared coherent gentle resource as the basic frequency resource dependant on nonlinear tuning know-how, generating ultraviolet coherent radiation by multistage frequency conversion is considered a significant strategy to create the ultraviolet coherent light-weight supply.
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We summarized the current improvement status with the substantial-energy DUV laser both of those with the wavelength of FHG from the one-μm laser and at 193 nm. The current improvement in the strong-point out/fiber laser, plus the nonlinear optical crystals, prompts not just the standard ability but in addition the beam high quality (coherence) in the DUV lasers to an unprecedented stage.
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。
Then again, the beam high quality of the higher electricity DUV laser would turn into even worse as a consequence of far more major thermal and nonlinear consequences. Consequently, the frequency conversion procedures ought to be meticulously designed to mitigate the aforementioned consequences. Hence, a significant-power DUV laser in the FHG of one μm with a very good beam high-quality could be attained and may be valuable for acquiring the shorter wavelength DUV lasers for example 193 nm by SFG.
LBO is likewise an excellent nonlinear crystal which is usually placed on the SHG within the NIR for the eco-friendly. The DUV laser is normally realized by two stages of SFG within the LBO crystals because there is no period-matching angle for LBO to convert the green laser at 515 nm or 532 get more info nm into the DUV right by SHG [sixteen]. Not long ago, the NSBBF crystal has also revealed its opportunity to acquire a substantial conversion performance from 532 nm to 266 nm. The walk-off angle and deff from the NSBBF are Pretty much comparable to Individuals of CLBO [17].
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The conversion performance from basic NIR to DUV is from five% to 36% according to the documented brings about Desk one. Raising the conversion efficiency will decrease the burden on the design and set up of the fundamental laser amplifier as well as the electrical power usage. A very good beam top quality of the elemental laser may also lead into the growing on the conversion performance as well as the appropriate electricity depth with the NIR and environmentally friendly laser during the SHG and FHG approach, respectively. The best conversion efficiencies from NIR to green and green to DUV laser by use of CLBO crystal are 70% and around fifty%, respectively [twelve], which corresponds on the conversion effectiveness of 35% from fundamental to DUV.
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