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For example, The existing concave OC could be replaced by a plane mirror which could mitigate the power density around the surface of M1 as well as diamond. Additionally, utilizing high hurt threshold coatings for M1 and diamond would also improve the output electric power without any damages. Then, the NIR laser for the 2nd Stokes wavelength could be superior adequate, as well as its fantastic beam top quality, to crank out the ultimate DUV laser at 193 nm having a substantial ordinary energy.
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Due to the thermal lens influence while in the strong-point out lasers, In case the heating management is inadequate, It isn't quick to obtain the reliable-point out laser which has a higher electricity and also a substantial beam quality at the same time. A short while ago, with the event of The skinny disk laser and one-crystal fiber (SCF) laser, a superior-power laser at the fundamental wavelength (one μm) were understood with a great beam good quality even with a TEM00 manner beam [4,24], which would be very good candidates for the fundamental from the DUV laser generation. A further applicant for the fundamental is definitely the higher-power fiber laser which can be realized by coherent more info beam combination with M2 benefit under 1.
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From the scientific and industrial programs, the beam high quality of the DUV laser is usually a very important parameter. Significantly, the beam high-quality on the DUV laser drastically affects the laser machining success. The beam high quality on the DUV laser is decided by that of the fundamental laser as well as crystal for your frequency conversion. Lately, a significant-power DUV laser (>ten W) at 258 nm was reported using a beam high-quality of M2 < 1.5, which was produced by FHG of a Yb:YAG laser at 1030 nm utilizing the CLBO crystal [thirteen]. This laser would cause an improved laser machining consequence in comparison to the earlier DUV lasers with much larger M2.
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The beam profile demonstrated in Determine 7b shown a good beam high quality as one of several deserves of Raman laser, which would be useful to crank out a 193-nm DUV laser with a top quality beam.
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