Even so, in an effort to method the crystal is extremely Highly developed production techniques are expected. Since the dawn of the crystal, working on this challenge, we are actually the only real organization on the globe which can be processed in this crystal.
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The average electric power with the NIR laser however has the probable to get improved to tens of watts including 70 W [26] In the event the double-pass configuration may very well be utilized for that Yb:YAG SCF amplifier stage. For this reason, if the conversion efficiency of 31% from NIR to DUV may be still preserved at this greater electricity affliction, the common output electrical power from the DUV laser at 258 nm may be much more than 20 W, which would be considered a impressive ability amount for the DUV laser and bring on the unanticipated DUV laser machining results. Furthermore, for prime-electricity DUV laser, the UV hurt on the nonlinear crystal, including the Home windows for CLBO crystal as well as mirrors, is yet another critical parameter for long run and stable operation.
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Both the 1040 nm and 1078 nm laser come from just one dual-wavelength Yb-doped fiber laser. Just about every laser is amplified by phases of fiber amplifier and Yb-doped products amplifier, respectively.
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Inside the scientific and industrial programs, the beam excellent on the DUV laser is additionally an essential parameter. Significantly, the beam good quality from 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 and the crystal to the frequency conversion. Lately, a significant-electrical power DUV laser (>10 W) at 258 nm was described that has a beam high-quality of M2 < 1.5, which was generated by FHG of a Yb:YAG laser at 1030 nm using the CLBO crystal [13]. This laser would result in a much better laser machining end result as compared to the previous DUV lasers with larger M2.
The pulse length of the 2nd Stokes light was shortened to 5 ns as demonstrated in Determine 7a, just one-shot photo from the oscilloscope, that's a standard phenomenon in Raman laser [forty four] whilst the heartbeat length with the pump laser was ten ns.
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Tunable ultraviolet laser resource dependant on stable-point out dye laser technological know-how and CsLiB6O10 harmonic era
The conversion efficiency from fundamental NIR to DUV is from 5% to 36% in accordance with the described brings about Desk one. Raising the conversion efficiency will lessen the stress on the design and setup of the fundamental laser amplifier along with the electrical electric power use. A good beam excellent of the fundamental laser may also contribute to your expanding with the conversion effectiveness as well as the suitable power depth from the NIR and eco-friendly laser during the SHG and FHG system, respectively. The best conversion efficiencies from NIR to eco-friendly and eco-friendly to DUV laser by utilization of CLBO crystal are 70% and about 50%, respectively [12], which corresponds to your conversion efficiency of 35% from elementary to DUV.
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