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The normal electricity in the NIR laser nonetheless has the potential to get improved to tens of watts which include 70 W [26] In case the double-pass configuration can be utilized with the Yb:YAG SCF amplifier stage. As a result, In case the conversion performance of 31% from NIR to DUV may be nonetheless preserved at this higher electricity condition, the common output ability from the DUV laser at 258 nm may be more than 20 W, which would become a extraordinary ability amount for the DUV laser and result in the unanticipated DUV laser machining final results. Additionally, for prime-electricity DUV laser, the UV hurt on the nonlinear crystal, including the windows for CLBO crystal and also the mirrors, is yet another vital parameter for long lasting and stable Procedure.
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From the scientific and industrial apps, the beam excellent on the DUV laser can be a vital parameter. Notably, the beam good quality on the DUV laser substantially impacts the laser machining results. The beam excellent on the DUV laser is determined by that of the basic laser and also the crystal with the frequency conversion. Just lately, a high-electric power DUV laser (>ten W) at 258 nm was noted which has a beam top quality of M2 < one.five, which was generated by FHG of a Yb:YAG laser at 1030 nm utilizing the CLBO crystal [thirteen]. This laser would bring about a far better laser machining outcome when compared to the previous DUV lasers with greater M2.
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Tunable ultraviolet laser supply depending on reliable-condition dye laser technological innovation and CsLiB6O10 harmonic era
The conversion efficiency from elementary NIR to DUV is from 5% to 36% based on the reported ends in Desk 1. Raising the conversion efficiency will decrease the burden on the design and set up of the fundamental laser amplifier together with the electric electric power use. A superb beam quality of the basic laser can even add towards the escalating with the conversion performance as well as the appropriate energy intensity from the NIR and inexperienced laser from the SHG and FHG system, respectively. The best conversion efficiencies from NIR to environmentally friendly and environmentally friendly to DUV laser by utilization of CLBO crystal are 70% and all around 50%, respectively [12], which corresponds to the conversion performance of 35% from elementary to DUV.
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