The Definitive Guide to CLBO Crystal
The Definitive Guide to CLBO Crystal
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Nevertheless, in order to process the crystal is quite advanced producing tactics are necessary. Since the dawn of this crystal, working on this obstacle, we are now the one business on the earth which might be processed In this particular crystal.
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The crucial element trouble of ultraviolet coherent light-weight supply primarily focuses on the event of nonlinear optical frequency conversion crystal in ultraviolet band. The nonlinear optical crystal is without doubt one of the circumstances for frequency transformation, so the growth, dimension, injury resistance, conversion effectiveness and allowable parameter variety of nonlinear optical crystal are needed A growing number of.
Alternatively, the beam quality of this bigger electrical power DUV laser would come to be even worse as a result of extra significant thermal and nonlinear consequences. Consequently, the frequency conversion procedures needs to be diligently made to mitigate the aforementioned outcomes. So, a higher-electric power DUV laser with the FHG of one μm with a very good beam high-quality could be attained and may be valuable for getting the shorter wavelength DUV lasers for instance 193 nm by SFG.
LBO is likewise an excellent nonlinear crystal which is always applied to the SHG within the NIR towards the inexperienced. The DUV laser is usually realized by two phases of SFG from the LBO crystals since there is absolutely no period-matching angle for LBO to convert the inexperienced laser at 515 nm or 532 nm to the DUV straight by SHG [16]. Just lately, the NSBBF crystal has also demonstrated its opportunity to acquire a higher conversion efficiency from 532 nm to 266 nm. The walk-off angle and deff from the NSBBF are Virtually much like Individuals of CLBO [seventeen].
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Inside the scientific and industrial apps, the beam excellent with the DUV laser is also a very important parameter. Significantly, the beam excellent of your DUV laser radically influences the laser machining outcomes. The beam quality of your DUV laser is set by that of the elemental laser plus the crystal for your frequency conversion. Just lately, a substantial-electricity DUV laser (>ten W) at 258 nm was documented with a beam good quality of M2 < one.5, which was produced by FHG of the Yb:YAG laser at 1030 nm using the CLBO crystal [thirteen]. This laser would result in an even better laser machining outcome as compared to the previous DUV lasers with much larger M2.
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In addition, combining the good-state laser with other nonlinear process which include stimulated Raman scattering, NIR lasers could possibly be obtained at new wavelengths with higher energy and higher beam excellent, which was tested from the proof-of-principle experiment. This Raman laser plan delivers a completely new path to the significant-energy DUV laser, Particularly in the wavelength of 193 nm.
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Its UV absorption edge reaches a hundred and eighty nm. The productive nonlinear optical coefficient of CLBO for frequency doubling at 1064nm is about two times as big as that of KDP. CLBO crystals may be developed through the stoichiometric melt with lower viscosity.
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