Nevertheless, in order to system the crystal is quite Highly developed manufacturing procedures are expected. Since the dawn of the crystal, focusing on this obstacle, we at the moment are the sole enterprise on the earth that may be processed During this crystal.
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We summarized the current advancement position with the higher-energy DUV laser equally in the wavelength of FHG of the one-μm laser and at 193 nm. The current enhancement in the sound-state/fiber laser, and also the nonlinear optical crystals, prompts not merely the average electricity but will also the beam high quality (coherence) on the DUV lasers to an unparalleled amount.
The normal energy with the NIR laser still has the prospective being enhanced to tens of watts like 70 W [26] if the double-go configuration could be used for that Yb:YAG SCF amplifier stage. That's why, In the event the conversion effectiveness of 31% from NIR to DUV can be even now preserved at this greater electrical power problem, the standard output power with the DUV laser at 258 nm might be a lot more than twenty W, which would become a amazing electrical power degree to the DUV laser and bring about the unanticipated DUV laser machining success. In addition, for top-energy DUV laser, the UV damage of your nonlinear crystal, including the Home windows for CLBO crystal and also the mirrors, is another essential parameter for long term and secure operation.
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On the other side, the facility scaling with the NIR laser is an additional facet to boost the average ability with the 193-nm DUV laser. A result of the not enough the higher-electrical power amplification Remedy of the NIR laser (such as at 1553 nm), nonlinear frequency processes including optical parameter oscillation (OPO) could possibly be placed on develop a wavelength converter by shifting the wavelength from one μm to the desired wavelength and getting relative increased power [21]. Just lately, a diamond Raman laser confirmed its ability in obtaining a superior power along with a large conversion effectiveness with the 1st Stokes with the one-μm laser [22,23], which means the likelihood being used from the 193-nm DUV laser technology due to its substantial Raman get and enormous frequency change.
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Within the scientific and industrial programs, the beam high quality with the DUV laser is likewise a very important parameter. Significantly, the beam excellent with the DUV laser substantially has an effect on the laser machining effects. The beam good quality of your DUV laser is set by that of the fundamental laser as well as crystal for that frequency conversion. Not too long ago, a superior-electricity DUV laser (>10 W) at 258 nm was reported that has a beam top quality of M2 < 1.five, which was created by FHG of a Yb:YAG laser at 1030 nm utilizing the CLBO crystal [thirteen]. This laser would bring about a better laser machining outcome when compared to the previous DUV lasers with more substantial M2.
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Cesium Lithium Borate (CsLiB6O10 or CLBO) is the most effective non-linear crystal which generates ultraviolet harmonics on the Nd:YAG essential laser wavelength. In order to improve the injury threshold, minimal CLBO surface area roughness, by ultra-precision machining, is necessary. Because the CLBO crystal has easy hydroscopic response and micro scratches in machining, extremely-precise machining from the CLBO crystal is often a challenging technical problem.
Tunable ultraviolet laser supply determined by sound-condition dye laser engineering and CsLiB6O10 harmonic generation
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