The Definitive Guide to CLBO Crystal
The Definitive Guide to CLBO Crystal
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All-good-point out ultraviolet lasers are greatly used in the fields of mechanical flaw detection, lithography, micromachining and medicine for the benefits of modest quantity, long existence, substantial effectiveness, great beam high quality, wide tuning and slender spectral line, and many others. Making use of substantial electricity close to-infrared coherent light-weight supply as the fundamental frequency source based on nonlinear tuning engineering, producing ultraviolet coherent radiation by multistage frequency conversion is regarded as an important strategy to create the ultraviolet coherent light-weight source.
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By way of example, The present concave OC could get replaced by a airplane mirror which could mitigate the ability density around the area of M1 plus the diamond. Additionally, applying significant hurt threshold coatings for M1 and diamond would also improve the output power with none damages. Then, the NIR laser with the 2nd Stokes wavelength might be superior plenty of, along with its good beam excellent, to produce the ultimate DUV laser at 193 nm which has a substantial typical electrical power.
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While in the scientific and industrial apps, the beam high quality with the DUV laser is usually a crucial parameter. Notably, the beam good quality with the DUV laser significantly has an effect on the laser machining results. The beam high quality from the DUV laser is set by that of the fundamental laser as well as the crystal for that frequency conversion. A short while ago, a superior-electricity DUV laser (>ten W) at 258 nm was claimed using a beam high-quality of M2 < 1.5, which was produced by FHG of the Yb:YAG laser at 1030 nm utilizing the CLBO crystal [13]. This laser would cause a better laser machining outcome when compared to the former DUV lasers with bigger M2.
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Additionally, combining the good-state laser with other nonlinear procedure for example stimulated Raman scattering, NIR lasers could be accomplished at new wavelengths with large electric power and superior beam read more quality, which was tested by the proof-of-basic principle experiment. This Raman laser plan supplies a whole new route to the large-electricity DUV laser, Specially in the wavelength of 193 nm.
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The conversion effectiveness from elementary NIR to DUV is from 5% to 36% in accordance with the documented results in Table one. Escalating the conversion performance will decrease the stress on the design and setup of the elemental laser amplifier plus the electric powered electrical power use. A good beam top quality of the elemental laser will also contribute on the expanding from the conversion effectiveness together with the right power intensity from the NIR and eco-friendly laser while in the SHG and FHG course of action, respectively. The best conversion efficiencies from NIR to environmentally friendly and inexperienced to DUV laser by utilization of CLBO crystal are 70% and close to fifty%, respectively [12], which corresponds on the conversion effectiveness of 35% from elementary to DUV.
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