CLBO Crystal Can Be Fun For Anyone
CLBO Crystal Can Be Fun For Anyone
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We summarized The present improvement position with the large-ability DUV laser equally in the wavelength of FHG of your 1-μm laser and at 193 nm. The new advancement on the solid-point out/fiber laser, in addition to the nonlinear optical crystals, prompts don't just the common electricity but also the beam top quality (coherence) with the DUV lasers to an unparalleled level.
The common electricity in the NIR laser still has the opportunity to become enhanced to tens of watts such as 70 W [26] In case the double-move configuration may very well be used for that Yb:YAG SCF amplifier stage. That's why, When the conversion effectiveness of 31% from NIR to DUV may very well be still taken care of at this larger electricity ailment, the normal output electrical power in the DUV laser at 258 nm may be greater than twenty W, which would certainly be a exceptional electric power amount for the DUV laser and result in the unanticipated DUV laser machining final results. Also, for prime-electricity DUV laser, the UV hurt with the nonlinear crystal, including the windows for CLBO crystal and also the mirrors, is an additional critical parameter for long lasting and stable Procedure.
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Equally the 1040 nm and 1078 nm laser come from 1 twin-wavelength Yb-doped fiber laser. Just about every laser is amplified by phases of fiber amplifier and Yb-doped supplies amplifier, respectively.
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Within the scientific and industrial applications, the beam good quality of your DUV laser can also be a vital parameter. Significantly, the beam high quality in the DUV laser considerably has an effect on the laser machining final results. The beam high-quality of the DUV laser is determined by that of the elemental laser and the crystal to the frequency conversion. Just lately, a large-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 produce an even better laser machining end result in comparison to the prior DUV lasers with much larger M2.
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What's more, combining the sound-point out laser with other nonlinear procedure for instance stimulated Raman scattering, NIR lasers might be read more realized at new wavelengths with higher electrical power and substantial beam high quality, which was tested because of the proof-of-principle experiment. This Raman laser scheme supplies a new path to the superior-electric power DUV laser, In particular at the wavelength of 193 nm.
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The conversion effectiveness from essential NIR to DUV is from 5% to 36% in accordance with the described results in Desk 1. Rising the conversion efficiency will decrease the burden on the look and setup of the elemental laser amplifier in addition to the electric powered electrical power use. A great beam excellent of the fundamental laser may even add to the escalating on the conversion performance as well as the appropriate electrical power intensity on the NIR and environmentally friendly laser in the SHG and FHG procedure, respectively. The highest conversion efficiencies from NIR to green and green to DUV laser by use of CLBO crystal are 70% and about 50%, respectively [12], which corresponds on the conversion effectiveness of 35% from basic to DUV.
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