KYW Crystal Secrets
KYW Crystal Secrets
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The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, when compared with its counterpart Yb:KGW, is usually a remarkable materials that plays a crucial position in laser know-how. Its Most important functionality should be to make ultrashort pulses of sunshine, spanning just a couple hundred femtoseconds.
time. Crystals of your compound melts congruently at 1007 oC, even so soften crystallization of high quality crystal is extremely hard as a consequence of stage changeover at ~920 oC. The best seeded Resolution technique from
FIG. four. Autocorrelation operate of the heart beat 共a兲and spectrum 共b兲of the laser with a rectangular Energetic element for an output electricity of seven-hundred mW. The width of
By substituting yttrium with ytterbium in the crystal lattice of Yb:KYW as a result of very similar dimensions of such chemical factors as many as a hundred% of Yb-doping might be achieved. This distinctive characteristic permits ytterbium to take the place of yttrium with practically no disruption for the crystal’s lattice.
The monoclinic crystal buildings results in a organic birefringence, helping to stay away from thermally induced polarization rotation and depolarization loss.
Raman, luminescence and transmission spectra expose optical capabilities owing on the existence of thulium ions, and as a consequence the supplies could possibly be further researched during the scope of laser and luminescence apps.
Spatial framework in the beam and also the corresponding depth profiles I on the output of the laser.
For tungstates, the ytterbium doping focus can be very substantial without considerable quenching since the changed ions have an exceedingly comparable ion radius, as well as the inter-ion length is pretty huge.
By substituting yttrium with ytterbium while in the crystal lattice of Yb:KYW a result of the related measurements of these chemical aspects as many as a hundred% of Yb-doping may very well be reached.
The thermal conductivity of widespread double tungstates is of your buy to 3–four W/(K m) �?which is not terrible in comparison more info with other laser crystals (although various instances less than for YAG), and reasonably large when compared Using the thermal conductivity of regular Eyeglasses.
Li2WO4-WO3 flux was efficiently utilized reducing the growth temperature underneath 900 oC. According to one crystal x-ray measurements, the crystal corresponds on the P2/n Place team.
The polarized absorption spectra of Tm3+-doped potassium yttrium tungstate (Tm:KY(WO4)two) crystal at room temperature have been calculated. The emission spectrum and lifetime in the three File four psyched point out were established. Employing typical and modified Judd–Ofelt theories, the depth parameters as well as radiative lifetimes ended up calculated and very good arrangement While using the experimental results was attained for each theories.
Simultaneously, a shorter laser wavelength may be obtained; it is achievable to operate that has a quantum defect perfectly under 1%. Being a consequence, the heat era can be so smaller that this partly compensates the decrease thermal conductivity.