The smart Trick of CLBO Crystal That Nobody is Discussing
The smart Trick of CLBO Crystal That Nobody is Discussing
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Nonetheless, to be able to process the crystal may be very Sophisticated producing tactics are needed. Because the dawn of the crystal, focusing on this obstacle, we are now the one business on the globe which can be processed in this crystal.
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We summarized The present improvement position in the substantial-electricity DUV laser each within the wavelength of FHG on the one-μm laser and at 193 nm. The modern development with the strong-condition/fiber laser, along with the nonlinear optical crystals, prompts not simply the typical electricity but additionally the beam top quality (coherence) with the DUV lasers to an unparalleled amount.
The typical electricity on the NIR laser nonetheless has the possible to become improved to tens of watts such as 70 W [26] In case the double-move configuration may be utilized to the Yb:YAG SCF amplifier stage. For this reason, In the event the conversion performance of 31% from NIR to DUV might be still preserved at this higher electric power situation, the standard output energy with the DUV laser at 258 nm could be over twenty W, which might become a outstanding electrical power stage for that DUV laser and produce the unanticipated DUV laser machining effects. What's more, for top-ability DUV laser, the UV damage of the nonlinear crystal, including the windows for CLBO crystal and also the mirrors, is another essential parameter for long-term and secure Procedure.
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Equally the 1040 nm and 1078 nm laser come from 1 dual-wavelength Yb-doped fiber laser. Every single laser is amplified by stages of fiber amplifier and Yb-doped supplies amplifier, respectively.
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During the scientific and industrial purposes, the beam high-quality of your DUV laser is usually a very important parameter. Significantly, the beam excellent on the DUV laser substantially affects the laser machining success. The beam excellent in the DUV laser is decided by that of the basic laser along with the crystal for your frequency conversion. A short while ago, a substantial-energy DUV laser (>10 W) at 258 nm was claimed by using a beam quality of M2 < 1.five, which was created by FHG of a Yb:YAG laser at 1030 nm using the CLBO crystal [13]. This laser would bring on a greater laser machining outcome compared to the former DUV lasers with greater M2.
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Also, combining the reliable-condition laser with other nonlinear process for instance stimulated Raman scattering, NIR lasers might be reached at new wavelengths with superior energy and substantial beam high-quality, which was examined by the proof-of-principle experiment. This Raman laser scheme get more info supplies a different path to the superior-ability DUV laser, Particularly in the wavelength of 193 nm.
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The conversion efficiency from essential NIR to DUV is from 5% to 36% in accordance with the documented brings about Table one. Escalating the conversion performance will reduce the load on the design and set up of the fundamental laser amplifier as well as the electrical power intake. A very good beam top quality of the elemental laser will also contribute on the expanding in the conversion performance in addition to the appropriate electric power depth of your NIR and green laser in the SHG and FHG procedure, respectively. The highest conversion efficiencies from NIR to eco-friendly and eco-friendly to DUV laser by use of CLBO crystal are 70% and about fifty%, respectively [twelve], which corresponds into the conversion efficiency of 35% from fundamental to DUV.
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