A Secret Weapon For CLBO Crystal
A Secret Weapon For CLBO Crystal
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All-solid-condition ultraviolet lasers have already been commonly Employed in the fields of mechanical flaw detection, lithography, micromachining and medication for the advantages of little quantity, prolonged existence, large performance, superior beam good quality, broad tuning and slender spectral line, and so on. Using large ability around-infrared coherent gentle resource as the elemental frequency resource determined by nonlinear tuning know-how, creating ultraviolet coherent radiation by multistage frequency conversion is thought to be an important way to acquire the ultraviolet coherent light-weight resource.
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We summarized The present advancement status of the superior-electricity DUV laser both of those with the wavelength of FHG with the 1-μm laser and at 193 nm. The new enhancement in the stable-state/fiber laser, plus the nonlinear optical crystals, prompts don't just the standard power but additionally the beam high-quality (coherence) in the DUV lasers to an unprecedented level.
The typical electrical power in the NIR laser nonetheless has the likely being improved to tens of watts such as 70 W [26] Should the double-pass configuration could possibly be used to the Yb:YAG SCF amplifier stage. That's why, When the conversion efficiency of 31% from NIR to DUV could be even now preserved at this better power affliction, the typical output energy in the DUV laser at 258 nm could possibly be in excess of twenty W, which would certainly be a extraordinary electric power stage for your DUV laser and bring on the unanticipated DUV laser machining outcomes. What's more, for high-energy DUV laser, the UV injury from the nonlinear crystal, including the windows for CLBO crystal as well as mirrors, is yet another vital parameter for lasting and secure Procedure.
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LBO is usually a fantastic nonlinear crystal which is often placed on the SHG in the NIR to your environmentally friendly. The DUV laser will likely be realized by two stages of SFG click here inside the LBO crystals due to the fact there isn't a section-matching angle for LBO to transform the inexperienced laser at 515 nm or 532 nm to your DUV instantly by SHG [sixteen]. Just lately, the NSBBF crystal has also demonstrated its likely to get a large conversion efficiency from 532 nm to 266 nm. The walk-off angle and deff of the NSBBF are Pretty much similar to Those people of CLBO [seventeen].
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In the scientific and industrial purposes, the beam good quality from the DUV laser is also an important parameter. Significantly, the beam good quality of the DUV laser considerably impacts the laser machining success. The beam top quality of your DUV laser is determined by that of the basic laser as well as crystal for your frequency conversion. Not long ago, a higher-electricity DUV laser (>ten W) at 258 nm was claimed by using a beam high-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 cause an even better laser machining final result in comparison to the earlier DUV lasers with more substantial M2.
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Its UV absorption edge reaches a hundred and eighty nm. The productive nonlinear optical coefficient of CLBO for frequency doubling at 1064nm is about two times as large as that of KDP. CLBO crystals is usually grown from the stoichiometric soften with reduced viscosity.
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