The Definitive Guide to CLBO Crystal
The Definitive Guide to CLBO Crystal
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All-reliable-condition ultraviolet lasers are already broadly Utilized in the fields of mechanical flaw detection, lithography, micromachining and medicine for the advantages of little volume, very long life, higher efficiency, great beam top quality, extensive tuning and slim spectral line, and so on. Employing large energy close to-infrared coherent light supply as the fundamental frequency supply depending on nonlinear tuning technological know-how, making ultraviolet coherent radiation by multistage frequency conversion is considered a significant strategy to build the ultraviolet coherent light supply.
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We summarized The existing progress position of the significant-electrical power DUV laser both equally for the wavelength of FHG in the 1-μm laser and at 193 nm. The recent growth with the solid-point out/fiber laser, along with the nonlinear optical crystals, prompts not just the common electric power but additionally the beam good quality (coherence) with the DUV lasers to an unparalleled stage.
The standard energy of the NIR laser still has the likely to be improved to tens of watts including 70 W [26] if the double-move configuration could be utilized for that Yb:YAG SCF amplifier phase. Therefore, Should the conversion efficiency of 31% from NIR to DUV might be nevertheless taken care of at this better energy affliction, the average output electricity of your DUV laser at 258 nm might be in excess of 20 W, which would be described as a outstanding electric power amount to the DUV laser and bring on the unanticipated DUV laser machining results. In addition, for prime-ability DUV laser, the UV damage from the nonlinear crystal, including the windows for CLBO crystal as well as the mirrors, is an additional crucial parameter for long lasting and stable Procedure.
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Both equally the 1040 nm and 1078 nm laser originate from one twin-wavelength Yb-doped fiber laser. Each individual laser is amplified by phases of fiber amplifier and Yb-doped resources amplifier, respectively.
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Cesium Lithium Borate (CsLiB6O10 or CLBO) is the most effective non-linear crystal which generates ultraviolet harmonics of the Nd:YAG elementary laser wavelength. In an effort to increase the harm threshold, low CLBO floor roughness, by ultra-precision machining, is required. Since the CLBO crystal has easy hydroscopic response and micro scratches in machining, extremely-exact machining of your CLBO crystal can be a difficult complex challenge.
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The conversion efficiency from essential NIR to DUV is from 5% to 36% in accordance with the noted brings about Table one. Increasing the conversion effectiveness will lessen the burden on the look and set up of the fundamental laser amplifier and also the electrical ability usage. A fantastic beam high quality of the basic laser will likely contribute towards the rising of your conversion efficiency in addition to the suitable electricity depth on the NIR and inexperienced laser within the SHG and FHG method, respectively. The very best conversion efficiencies from NIR to eco-friendly and eco-friendly to DUV laser by use of CLBO crystal are 70% and about 50%, respectively [twelve], which corresponds to your conversion efficiency of 35% from fundamental to DUV.
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