KYW Crystal Secrets
KYW Crystal Secrets
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The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, in comparison with its counterpart Yb:KGW, is actually a extraordinary substance that performs a significant position in laser technologies. Its primary purpose is always to generate ultrashort pulses of sunshine, spanning just some hundred femtoseconds.
time. Crystals from the compound melts congruently at 1007 oC, nevertheless soften crystallization of top quality crystal is unattainable because of section transition at ~920 oC. The best seeded Resolution technique from
The absorption and emission spectra of Yb:KYW Crystals Show sturdy peaks at 980 nm and 1030 nm, respectively, guaranteeing economical Electrical power conversion and high efficiency in laser techniques.
By substituting yttrium with ytterbium inside the crystal lattice of Yb:KYW as a result of very similar dimensions of those chemical things nearly a hundred% of Yb-doping could be accomplished. This special characteristic permits ytterbium to take the location of yttrium with practically no disruption towards the crystal’s lattice.
The monoclinic crystal buildings ends in a pure birefringence, helping to stay away from thermally induced polarization rotation and depolarization loss.
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5 mm apart from the middle with the beam caustic. So as to Check out the method matching simulation, we performed the experiment with Ng-Slash crystal oscillator, which was developed Formerly and in a exact same issue with simulation [11]. As proven in Determine 3(b) with red dots and line, the CW output power is get more info highly dependent on the situation of laser crystal and the experimental outcome coincides very well with simulation result. Being a Notice, multimode operation happened in experiment when the measurement on the pump beam is larger than TEM00 cavity mode and it causes increased CW output ability within the displacement area underneath three.five mm.
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By substituting yttrium with ytterbium in the crystal lattice of Yb:KYW due to the identical measurements of these chemical elements nearly one hundred% of Yb-doping might be achieved.
Though ytterbium-doped laser gain media generally exhibit a small quantum defect, ytterbium-doped tungstates permit for specifically tiny values. By way of example, a 1030-nm Yb:YAG laser would Generally be pumped all around 940 nm, While Yb:KGW or Yb:KYW could possibly be most proficiently pumped close to 981 nm.
Li2WO4-WO3 flux was correctly applied minimizing The expansion temperature down below 900 oC. In accordance with solitary crystal x-ray measurements, the crystal corresponds into the P2/n space group.
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