The smart Trick of CLBO Crystal That No One is Discussing
The smart Trick of CLBO Crystal That No One is Discussing
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We summarized the current improvement status of the significant-electrical power DUV laser each at the wavelength of FHG with the 1-μm laser and at 193 nm. The latest improvement with the solid-point out/fiber laser, as well as the nonlinear optical crystals, prompts not merely the typical ability but additionally the beam top quality (coherence) of your DUV lasers to an unprecedented level.
As an illustration, The present concave OC could be replaced by a airplane mirror which could mitigate the facility density to the surface area of M1 along with the diamond. What's more, making use of superior destruction threshold coatings for M1 and diamond would also improve the output electrical power with none damages. Then, the NIR laser for the 2nd Stokes wavelength may very well be superior adequate, and also its good beam high-quality, to deliver the ultimate DUV laser at 193 nm with a large common energy.
On the other hand, the beam high quality of this higher ability DUV laser would develop into worse as a result of much more major thermal and nonlinear outcomes. That's why, the frequency conversion processes must be carefully designed to mitigate the aforementioned consequences. Therefore, a substantial-ability DUV laser in the FHG of 1 μm with a fantastic beam quality could possibly be received and will be advantageous for obtaining the shorter wavelength DUV lasers including 193 nm by SFG.
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While in the scientific and industrial purposes, the beam quality from the DUV laser is additionally a vital parameter. Specifically, the beam top quality in the DUV laser drastically impacts the laser machining outcomes. The beam good quality on the DUV laser is set by that of the fundamental laser and also the crystal for the frequency conversion. Recently, a high-electric power DUV laser (>10 W) at 258 nm was described having a beam quality of M2 < 1.5, which was produced by FHG of a Yb:YAG laser at 1030 nm using the CLBO crystal [13]. This laser would result in a much better laser machining end result in comparison to the preceding DUV lasers with larger M2.
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