CLBO Crystal Fundamentals Explained
CLBO Crystal Fundamentals Explained
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All-sound-state ultraviolet lasers are already commonly Employed in the fields of mechanical flaw detection, lithography, micromachining and medication for the benefits of tiny volume, lengthy existence, substantial performance, great beam top quality, vast tuning and narrow spectral line, and so on. Utilizing high power near-infrared coherent mild supply as the fundamental frequency resource based upon nonlinear tuning technological innovation, producing ultraviolet coherent radiation by multistage frequency conversion is viewed as a crucial solution to produce the ultraviolet coherent light source.
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The average power of the NIR laser continue to has the likely for being enhanced to tens of watts for instance 70 W [26] In case the double-pass configuration can be utilized for your Yb:YAG SCF amplifier phase. For this reason, In case the conversion efficiency of 31% from NIR to DUV can be even now maintained at this increased electrical power condition, the normal output electrical power on the DUV laser at 258 nm could possibly be much more than 20 W, which would be described as a extraordinary energy degree to the DUV laser and produce the unanticipated DUV laser machining results. Furthermore, for high-electrical power DUV laser, the UV damage of the nonlinear crystal, such as the Home windows for CLBO crystal as well as mirrors, is yet another important parameter for lasting and steady operation.
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Within the scientific and industrial applications, the beam top quality in the DUV laser can be a significant parameter. Significantly, the beam top quality on the DUV laser drastically affects the laser machining success. The beam good quality from the DUV laser is decided by that of the basic laser and the crystal to the frequency conversion. Not long ago, a higher-ability DUV laser (>10 W) at 258 nm was described having a beam excellent of M2 < 1.5, which was produced by FHG of the Yb:YAG laser at 1030 nm utilizing the CLBO crystal [13]. This laser would lead to an even better laser machining result when compared to the prior DUV lasers with much larger M2.
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The beam profile revealed in Determine 7b shown a good beam top quality as among the list of deserves of Raman laser, which might be valuable to deliver a 193-nm DUV laser with a top quality beam.
Its UV absorption edge reaches more info a hundred and eighty nm. The helpful nonlinear optical coefficient of CLBO for frequency doubling at 1064nm is about two times as big as that of KDP. CLBO crystals is usually grown within the stoichiometric soften with reduced viscosity.
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