A Review Of CLBO Crystal
A Review Of CLBO Crystal
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We summarized The present improvement position in the high-electric power DUV laser the two at the wavelength of FHG on the one-μm laser and at 193 nm. The modern development on the good-state/fiber laser, and also the nonlinear optical crystals, prompts not just the normal power but in addition the beam high-quality (coherence) of the DUV lasers to an unprecedented amount.
The common power in the NIR laser however has the probable being enhanced to tens of watts for example 70 W [26] if the double-go configuration can be utilized with the Yb:YAG SCF amplifier phase. Consequently, if the conversion efficiency of 31% from NIR to DUV could possibly be however managed at this bigger power affliction, the normal output electricity on the DUV laser at 258 nm may be in excess of twenty W, which would be considered a outstanding energy amount for that DUV laser and cause the unanticipated DUV laser machining final results. Furthermore, for prime-electrical power DUV laser, the UV damage with the nonlinear crystal, including the Home windows for CLBO crystal along with the mirrors, is another vital parameter for long lasting and secure operation.
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On the other aspect, the ability scaling from the NIR laser is yet another facet to increase the regular power with the 193-nm DUV laser. Because of the deficiency of click here the higher-electric power amplification Option of the NIR laser (by way of example at 1553 nm), nonlinear frequency procedures such as optical parameter oscillation (OPO) could possibly be applied to make a wavelength converter by shifting the wavelength from one μm to the specified wavelength together with getting relative bigger power [21]. Not too long ago, a diamond Raman laser showed its capacity in accomplishing a high energy as well as a higher conversion efficiency at the 1st Stokes of the 1-μm laser [22,23], which means the likelihood for being applied during the 193-nm DUV laser era as a result of its high Raman attain and enormous frequency shift.
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In addition, combining the good-state laser with other nonlinear method like stimulated Raman scattering, NIR lasers can be accomplished at new wavelengths with substantial electricity and superior beam high quality, which was tested with the evidence-of-basic principle experiment. This Raman laser scheme gives a whole new path to the higher-ability DUV laser, especially on the wavelength of 193 nm.
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The conversion efficiency from fundamental NIR to DUV is from five% to 36% based on the noted ends in Table one. Growing the conversion effectiveness will reduce the load on the look and set up of the fundamental laser amplifier plus the electric electricity consumption. A superb beam quality of the basic laser can even contribute for the raising of the conversion efficiency and also the right power intensity from the NIR and eco-friendly laser during the SHG and FHG process, respectively. The best conversion efficiencies from NIR to inexperienced and inexperienced to DUV laser by utilization of CLBO crystal are 70% and all over fifty%, respectively [twelve], which corresponds for the conversion efficiency of 35% from essential to DUV.
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