Having said that, so that you can course of action the crystal is incredibly Superior producing tactics are needed. Since the dawn of this crystal, engaged on this challenge, we are actually the only corporation on earth which might be processed On this crystal.
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In accordance with the proof-of-principle experiment, the conversion efficiency of 23% implied the possibility of accomplishing high-electrical power at the next Stokes wavelength on the Raman laser. If your pump laser of 1078 nm can be obtained at the typical power of fifty W, the output power of its 2nd Stokes wavelength at 1512 nm might be over 10 W. The look from the Raman laser cavity must be optimized in an effort to stay away from the harm of the M1 and diamond surface area.
The typical energy in the NIR laser nonetheless has the potential being improved to tens of watts like 70 W [26] if the double-move configuration might be used for your Yb:YAG SCF amplifier stage. As a result, if the conversion performance of 31% from NIR to DUV could possibly be still taken care of at this higher electricity ailment, the typical output electric power of the DUV laser at 258 nm could possibly be a lot more than twenty W, which might be a exceptional electricity amount for the DUV laser and result in the unanticipated DUV laser machining final results. Additionally, for prime-electricity DUV laser, the UV hurt of your nonlinear crystal, such as the Home windows for CLBO crystal plus the mirrors, is an additional critical parameter for lasting and steady operation.
However, the beam excellent of this larger ability DUV laser would grow to be even worse resulting from more significant thermal and nonlinear outcomes. Hence, the frequency conversion processes really should be carefully created to mitigate the aforementioned results. As a result, a significant-ability DUV laser within the FHG of one μm with a very good beam quality might be obtained and will be helpful for obtaining the shorter wavelength DUV lasers such as 193 nm by SFG.
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Furthermore, combining the stable-point out laser with other nonlinear system which include stimulated Raman scattering, NIR lasers may be attained at new wavelengths with high electrical power and superior beam top quality, which was examined by more info the proof-of-theory experiment. This Raman laser scheme presents a brand new route to the significant-electricity DUV laser, Primarily with the wavelength of 193 nm.
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The conversion effectiveness from essential NIR to DUV is from 5% to 36% based on the reported ends in Desk 1. Rising the conversion performance will reduce the load on the look and set up of the fundamental laser amplifier plus the electric powered energy usage. A fantastic beam quality of the fundamental laser can even contribute for the escalating on the conversion performance and also the right electric power depth of the NIR and green laser within the SHG and FHG method, respectively. The very best conversion efficiencies from NIR to eco-friendly and inexperienced to DUV laser by utilization of CLBO crystal are 70% and all around 50%, respectively [twelve], which corresponds for the conversion efficiency of 35% from fundamental to DUV.
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