During this paper, the new lapping slurry and sprucing slurry are introduced. Along with the deliquescence diploma of CLBO is fallen to least expensive. A fresh Doing the job engineering is likewise adopted. After rough polishing, the concentration of ultra-precision polishing slurry is elevated effectively. So does the ultra-precision polishing speed, and also the wiping pace is faster in comparison to the deliquescence velocity. The CLBO crystal floor roughness can realize 1nm and preserve the surface area high quality nicely. Access through your institution
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As an example, the current concave OC could get replaced by a aircraft mirror which could mitigate the power density on the area of M1 along with the diamond. In addition, utilizing high problems threshold coatings for M1 and diamond would also Enhance the output electrical power without any damages. Then, the NIR laser within the 2nd Stokes wavelength may be higher plenty of, along with its superior beam good quality, to deliver the final DUV laser at 193 nm which has a higher normal power.
On the other hand, the beam excellent of the higher electric power DUV laser would grow to be even worse due to far more serious thermal and nonlinear results. For this reason, the frequency conversion procedures ought to be meticulously meant to mitigate the aforementioned effects. Therefore, a higher-electricity DUV laser within the FHG of one μm with a good beam high quality might be acquired and will be beneficial for getting the shorter wavelength DUV lasers such as 193 nm by SFG.
LBO can be an excellent nonlinear crystal which is always applied to the SHG within the NIR towards the inexperienced. The DUV laser will likely be realized by two stages of SFG inside the LBO crystals due to the fact there's no period-matching angle for LBO to transform the eco-friendly laser at 515 nm or 532 nm for the DUV right by SHG [16]. Just lately, the NSBBF crystal has also demonstrated its probable to get a substantial conversion effectiveness from 532 nm to 266 nm. The walk-off angle and deff from the NSBBF are Nearly much like Individuals of CLBO [seventeen].
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Within the scientific and industrial apps, the beam excellent of your DUV laser is usually an important parameter. Significantly, the beam high-quality with the DUV laser substantially impacts the laser machining outcomes. The beam quality with the DUV laser is set by that of the elemental laser plus the crystal to the frequency conversion. Lately, a superior-electricity DUV laser (>ten W) at 258 nm was claimed by using a beam top quality of M2 < one.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 end result in comparison with the prior DUV lasers with bigger M2.
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Tunable ultraviolet laser source according to strong-state dye laser engineering and CsLiB6O10 harmonic era
The conversion efficiency from elementary NIR to DUV is from 5% to 36% based on the noted brings about Table one. Growing the conversion performance will reduce the load on the look and setup of the basic laser amplifier as well as the electrical power use. An excellent beam high-quality of the fundamental laser may even add to the growing of the conversion efficiency in addition to the right electric power intensity in the NIR and eco-friendly laser inside the SHG and FHG approach, respectively. The very best conversion efficiencies from NIR to environmentally friendly and green to DUV more info laser by use of CLBO crystal are 70% and close to 50%, respectively [12], which corresponds to your conversion effectiveness of 35% from fundamental to DUV.
The development on the 193-nm laser was demonstrated by phases of SFG. To be able to scale the DUV laser ability properly, a new principle of your 193-nm DUV laser generation is introduced according to the diamond Raman laser.