All-solid-state ultraviolet lasers happen to be commonly Employed in the fields of mechanical flaw detection, lithography, micromachining and medication for some great benefits of little volume, extended daily life, significant performance, very good beam quality, large tuning and slim spectral line, and so forth. Utilizing significant electric power in close proximity to-infrared coherent mild resource as the fundamental frequency resource based on nonlinear tuning technologies, creating ultraviolet coherent radiation by multistage frequency conversion is considered an essential way to acquire the ultraviolet coherent mild resource.
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As an example, The existing concave OC could be replaced by a aircraft mirror which could mitigate the facility density to the surface of M1 plus the diamond. Furthermore, applying significant injury threshold coatings for M1 and diamond would also Increase the output electricity with none damages. Then, the NIR laser with the 2nd Stokes wavelength could possibly be substantial enough, and its very good beam high quality, to deliver the final DUV laser at 193 nm which has a large normal energy.
Then again, the beam quality of the greater electrical power DUV laser would turn into even worse as a result of extra critical thermal and nonlinear consequences. That's why, the frequency conversion procedures ought to be thoroughly made to mitigate the aforementioned effects. Hence, a substantial-electric power DUV laser on the FHG of one μm with a fantastic beam high-quality can be attained and may be valuable for acquiring the shorter wavelength DUV lasers for example 193 nm by SFG.
Equally the 1040 nm and 1078 nm laser come from a person twin-wavelength Yb-doped fiber laser. Each individual laser is amplified by stages of fiber amplifier and Yb-doped supplies amplifier, respectively.
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From the scientific and industrial apps, the beam excellent of your DUV laser is also an important parameter. Particularly, the beam high-quality with the DUV laser considerably impacts the laser machining benefits. The beam high-quality of your DUV laser is set by that of the elemental laser plus the crystal for your frequency conversion. Just lately, a superior-electricity DUV laser (>10 W) at 258 nm was CLBO Crystal described having a beam quality of M2 < 1.five, which was generated by FHG of a Yb:YAG laser at 1030 nm utilizing the CLBO crystal [13]. This laser would bring on a much better laser machining result when compared to the prior DUV lasers with more substantial M2.
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Cesium Lithium Borate (CsLiB6O10 or CLBO) is the most effective non-linear crystal which generates ultraviolet harmonics in the Nd:YAG basic laser wavelength. In an effort to enrich the problems threshold, small CLBO floor roughness, by ultra-precision machining, is needed. As the CLBO crystal has easy hydroscopic response and micro scratches in machining, extremely-precise machining of the CLBO crystal is a difficult complex issue.
Tunable ultraviolet laser resource according to sound-state dye laser engineering and CsLiB6O10 harmonic generation
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