The smart Trick of CLBO Crystal That No One is Discussing
The smart Trick of CLBO Crystal That No One is Discussing
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All-strong-point out ultraviolet lasers are extensively Employed in the fields of mechanical flaw detection, lithography, micromachining and medicine for the benefits of small quantity, very long existence, significant performance, good beam high quality, vast tuning and slim spectral line, and so forth. Employing higher energy in close proximity to-infrared coherent light supply as the elemental frequency source based on nonlinear tuning technology, creating ultraviolet coherent radiation by multistage frequency conversion is considered to be a significant solution to develop the ultraviolet coherent light-weight supply.
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The standard energy on the NIR laser still has the potential to become improved to tens of watts for instance 70 W [26] When the double-move configuration can be utilized for your Yb:YAG SCF amplifier phase. As a result, When the conversion efficiency of 31% from NIR to DUV may very well be continue to maintained at this increased electricity affliction, the average output energy from the DUV laser at 258 nm could possibly be a lot more than 20 W, which would become a impressive electricity degree for your DUV laser and result in the unanticipated DUV laser machining outcomes. Moreover, for top-ability DUV laser, the UV destruction on the nonlinear crystal, including the windows for CLBO crystal and also the mirrors, is another important parameter for long-lasting and steady operation.
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Within the scientific and industrial applications, the beam top quality in the DUV laser is additionally a crucial parameter. Notably, the beam good quality on the DUV laser substantially impacts the laser machining outcomes. The beam high quality of the DUV laser is determined by that of the elemental laser as well as crystal for that frequency conversion. Just lately, a large-energy DUV laser (>ten W) at 258 nm was described that has a beam top quality of M2 < 1.five, which was produced by FHG of the Yb:YAG laser at 1030 nm using the CLBO crystal [13]. This read more laser would bring on an even better laser machining end result in comparison with the previous DUV lasers with larger sized M2.
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The beam profile demonstrated in Determine 7b shown a good beam top quality as one of many merits of Raman laser, which might be useful to generate a 193-nm DUV laser with a top quality beam.
The conversion efficiency from fundamental NIR to DUV is from 5% to 36% in accordance with the claimed results in Table one. Raising the conversion performance will lessen the stress on the look and setup of the basic laser amplifier together with the electric powered electricity consumption. A good beam top quality of the basic laser can even add into the increasing from the conversion effectiveness and also the suitable electric power depth with 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 usage of CLBO crystal are 70% and all over fifty%, respectively [12], which corresponds towards the conversion efficiency of 35% from fundamental to DUV.
The development with the 193-nm laser was demonstrated by levels of SFG. In an effort to scale the DUV laser energy correctly, a fresh concept of your 193-nm DUV laser technology is introduced depending on the diamond Raman laser.