The smart Trick of CLBO Crystal That Nobody is Discussing
The smart Trick of CLBO Crystal That Nobody is Discussing
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All-good-point out ultraviolet lasers have been commonly Utilized in the fields of mechanical flaw detection, lithography, micromachining and medication for the benefits of modest volume, very long existence, higher effectiveness, good beam top quality, extensive tuning and narrow spectral line, etcetera. Making use of higher electric power around-infrared coherent light-weight supply as the fundamental frequency source depending on nonlinear tuning technology, building ultraviolet coherent radiation by multistage frequency conversion is considered a vital way to establish the ultraviolet coherent mild source.
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By way of example, the current concave OC could get replaced by a aircraft mirror which could mitigate the power density over the area of M1 as well as diamond. What's more, employing higher destruction threshold coatings for M1 and diamond would also improve the output electricity without any damages. Then, the NIR laser with the 2nd Stokes wavelength might be higher more than enough, along with its superior beam good quality, to make the ultimate DUV laser at 193 nm with a substantial regular ability.
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LBO is usually an outstanding nonlinear crystal which is always applied to the SHG with the NIR towards the eco-friendly. The DUV laser is frequently understood by two stages of SFG from the LBO crystals since there is absolutely no period-matching angle for LBO to transform the inexperienced laser at 515 nm or 532 nm into the DUV directly by SHG [sixteen]. Not long ago, the NSBBF crystal has also demonstrated its probable to get a substantial conversion efficiency from 532 nm to 266 nm. The walk-off angle and deff from the NSBBF are Nearly much like those of CLBO [seventeen].
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Its UV absorption edge reaches a hundred and eighty nm. The powerful nonlinear optical coefficient of CLBO for frequency doubling at 1064nm is about twice as significant as that of KDP. CLBO crystals is often grown with the stoichiometric melt with decrease viscosity.
The development of your 193-nm laser was demonstrated by phases of SFG. So that you can scale the DUV laser electrical power proficiently, a new idea from the 193-nm DUV laser era is offered dependant on the diamond Raman laser.