The Greatest Guide To CLBO Crystal
The Greatest Guide To CLBO Crystal
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All-reliable-point out ultraviolet lasers have been extensively Utilized in the fields of mechanical flaw detection, lithography, micromachining and medication for the advantages of little volume, extensive life, superior performance, excellent beam top quality, broad tuning and narrow spectral line, etcetera. Making use of large power in the vicinity of-infrared coherent gentle resource as the basic frequency supply depending on nonlinear tuning technological innovation, producing ultraviolet coherent radiation by multistage frequency conversion is considered to be an essential method to create the ultraviolet coherent gentle source.
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For example, the current concave OC could get replaced by a plane mirror which could mitigate the power density over the floor of M1 and also the diamond. Additionally, making use of higher destruction threshold coatings for M1 and diamond would also Enhance the output power without any damages. Then, the NIR laser with the 2nd Stokes wavelength might be significant more than enough, in addition to its good beam good quality, to make the ultimate DUV laser at 193 nm having a significant average electrical power.
Alternatively, the beam high-quality of this better energy DUV laser would come to be worse as a consequence of a lot more major thermal and nonlinear outcomes. For this reason, the frequency conversion procedures need to be very carefully built to mitigate the aforementioned consequences. So, a high-electric power DUV laser in the FHG of one μm with a great beam high quality could be obtained and can be helpful for getting the shorter wavelength DUV lasers for example 193 nm by SFG.
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On the opposite side, the ability scaling of the NIR laser is an additional element to improve the typical electric power from the 193-nm DUV laser. Due to the deficiency of the large-electricity amplification Remedy from the NIR laser (one example is at 1553 nm), nonlinear frequency procedures like optical parameter oscillation (OPO) may very well be applied to make a wavelength converter by shifting the wavelength from one μm to the desired wavelength together with obtaining relative increased power [21]. Not too long ago, a diamond Raman laser confirmed its capacity in acquiring a higher electrical power and also a superior conversion efficiency in the 1st Stokes in the 1-μm laser [22,23], which implies the likelihood to be applied in the 193-nm DUV laser era as a consequence of its significant Raman get and huge frequency shift.
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The beam profile demonstrated in Determine 7b demonstrated a very good beam good quality as among the deserves of Raman laser, which might be beneficial to create a 193-nm DUV laser with a top quality beam.
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