Having said that, in order to course of action the crystal is extremely advanced production strategies are demanded. Since the dawn of the crystal, working on this obstacle, we are now the only real corporation on this planet that may be processed in this crystal.
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The typical energy of the NIR laser continue to has the probable to get improved to tens of watts which include 70 W [26] In case the double-move configuration could possibly be utilized for the Yb:YAG SCF amplifier phase. That's why, In the event the conversion performance of 31% from NIR to DUV may very well be nevertheless maintained at this better electrical power affliction, the typical output ability from the DUV laser at 258 nm may very well be more than 20 W, which would be described as a extraordinary energy degree to the DUV laser and cause the unanticipated DUV laser machining results. Furthermore, for top-power DUV laser, the UV harm in the nonlinear crystal, including the windows for CLBO crystal plus the mirrors, is yet another vital parameter for long term and secure operation.
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Each the 1040 nm and 1078 nm laser originate from a person twin-wavelength Yb-doped fiber laser. Every single laser is amplified by phases of fiber amplifier and Yb-doped products amplifier, respectively.
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In the scientific and industrial applications, the beam quality of the DUV laser can also be an essential parameter. Specifically, the beam high quality of the DUV laser dramatically has an effect on the laser machining effects. The beam good quality from the DUV laser is decided by that of the basic laser plus the crystal for your frequency conversion. Not long ago, a substantial-electrical power DUV laser (>ten W) at 258 nm was described using a beam quality of M2 < 1.five, which was generated by FHG of the Yb:YAG laser at 1030 nm using the CLBO crystal [thirteen]. This laser would lead to an even better laser machining outcome compared to the earlier DUV lasers with much larger 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. So as to enrich the destruction threshold, small CLBO area roughness, by extremely-precision machining, is required. Since the CLBO crystal has uncomplicated hydroscopic response and micro scratches in machining, ultra-precise machining from the CLBO crystal is often a complicated specialized issue.
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The conversion efficiency from elementary NIR to DUV is from 5% to 36% in accordance with the documented results in Desk 1. Raising the conversion efficiency will lessen the load on the look and setup of the basic laser amplifier in addition to the electric powered electrical power use. An excellent beam high-quality of the fundamental laser can even add for the raising of the conversion efficiency and also the suitable electric power depth of the NIR and eco-friendly laser while in the SHG and FHG course of action, respectively. The very best conversion efficiencies from NIR to eco-friendly and inexperienced to DUV laser by utilization of CLBO crystal are 70% and all over fifty%, respectively [twelve], which corresponds into the conversion performance of 35% from essential to DUV.
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