Examine This Report on CLBO Crystal
Examine This Report on CLBO Crystal
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All-sound-condition ultraviolet lasers happen to be broadly Employed in the fields of mechanical flaw detection, lithography, micromachining and medicine for some great benefits of tiny volume, extended lifestyle, higher performance, very good beam good quality, broad tuning and slim spectral line, and so forth. Making use of large power in close proximity to-infrared coherent gentle source as the basic frequency source dependant on nonlinear tuning technology, creating ultraviolet coherent radiation by multistage frequency conversion is regarded as a vital way to build the ultraviolet coherent gentle supply.
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The typical electrical power in the NIR laser however has the opportunity to get improved to tens of watts like 70 W [26] If your double-move configuration might be used for your Yb:YAG SCF amplifier phase. Therefore, If your conversion efficiency of 31% from NIR to DUV might be continue to taken care of at this better energy issue, the average output electricity of the DUV laser at 258 nm may be greater than twenty W, which would be considered a outstanding electric power level for your DUV laser and produce the unanticipated DUV laser machining results. Furthermore, for high-energy DUV laser, the UV harm of the nonlinear crystal, such as the Home windows for CLBO crystal plus the mirrors, is an additional important parameter for long term and secure operation.
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LBO can also be a fantastic nonlinear crystal which is often placed on the SHG within the NIR to the green. The DUV laser is frequently realized by two levels of SFG during the LBO crystals considering the fact that there's no stage-matching angle for LBO to convert the environmentally friendly laser at 515 nm or 532 nm to your DUV immediately by SHG [16]. A short while ago, the NSBBF crystal has also demonstrated its possible to acquire a higher conversion efficiency from 532 nm to 266 nm. The walk-off angle and deff of your NSBBF are almost comparable to All those of CLBO [17].
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In addition, combining the strong-condition laser with other nonlinear course of action like stimulated Raman scattering, NIR lasers may be obtained at new wavelengths with higher electrical power and substantial beam high-quality, which was analyzed via the evidence-of-basic principle experiment. This Raman laser plan provides a fresh route to the higher-energy DUV laser, Particularly at 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 reported results in Desk one. Growing the conversion performance will lessen the burden on the look and setup of the elemental laser amplifier plus the electric powered electric power intake. A great beam high-quality of the elemental laser can even contribute to your growing from the conversion performance as well as the suitable power intensity with the NIR and green laser within the SHG and FHG approach, respectively. The best conversion efficiencies from NIR to eco-friendly and eco-friendly to DUV laser by use of CLBO crystal are 70% and about 50%, respectively [twelve], which corresponds to your conversion effectiveness of 35% from essential to DUV.
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