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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All-solid-state ultraviolet lasers happen to be extensively Utilized in the fields of mechanical flaw detection, lithography, micromachining and medication for the benefits of tiny volume, extended existence, large efficiency, good beam high-quality, broad tuning and narrow spectral line, etcetera. Using higher power near-infrared coherent gentle resource as the basic frequency resource dependant on nonlinear tuning technologies, building ultraviolet coherent radiation by multistage frequency conversion is considered an essential solution to create the ultraviolet coherent light supply.
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By way of example, The present concave OC could get replaced by a aircraft mirror which could mitigate the power density around the area of M1 plus the diamond. In addition, utilizing large harm threshold coatings for M1 and diamond would also Increase the output electrical power with none damages. Then, the NIR laser with the 2nd Stokes wavelength could possibly be superior ample, together with its great beam excellent, to produce the final DUV laser at 193 nm having a significant average electricity.
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Each the 1040 nm and 1078 nm laser originate from a person twin-wavelength Yb-doped fiber laser. Every laser is amplified by levels of fiber amplifier and Yb-doped supplies amplifier, respectively.
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Within the scientific and industrial applications, the beam quality of the DUV laser is also an important parameter. Particularly, the beam top quality on the DUV laser substantially affects the laser machining success. The beam excellent of your DUV laser is set by that of the fundamental laser and the crystal for that frequency conversion. A short while ago, a substantial-power DUV laser (>10 W) at 258 nm was claimed using a beam high-quality of M2 < 1.5, which was created by FHG of a Yb:YAG laser at 1030 nm utilizing the CLBO crystal [thirteen]. This laser would result in an even better laser machining result when compared to the previous DUV lasers with greater M2.
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The beam profile revealed in Determine 7b shown a great beam quality as one of several merits of Raman laser, which would be helpful to crank out a 193-nm DUV laser with a top quality beam.
The conversion efficiency from essential NIR to DUV is from 5% to 36% in accordance with the noted brings about Table one. Growing the conversion effectiveness will reduce the load on the look and setup of the basic laser amplifier as well as the electrical ability usage. A very good beam high quality of the basic laser will likely contribute for the raising of the conversion efficiency along with the suitable electric power depth of your NIR and green laser within the SHG and FHG procedure, respectively. The very best conversion efficiencies from NIR to inexperienced and eco-friendly to DUV laser by utilization of CLBO crystal are 70% and close to 50%, respectively [12], which corresponds to the conversion performance of 35% from elementary to DUV.
The event of the 193-nm laser was demonstrated by levels of SFG. As a way to scale the DUV laser ability effectively, a different idea with the 193-nm DUV laser technology is presented depending on the diamond Raman laser.