Fascination About KYW Crystal
Fascination About KYW Crystal
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The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, when compared to its counterpart Yb:KGW, is really a impressive substance that performs a very important role in laser technological know-how. Its primary function is to generate ultrashort pulses of sunshine, spanning just a couple hundred femtoseconds.
The Yb:KYW crystal’s proficiency in light-weight absorption at about 981 nm will make the crystal like minded for diode pumping. It truly is further more enhanced by its exceptional effectiveness in this process, coupled with its lower quantum defect.
FIG. four. Autocorrelation operate of the heart beat 共a兲and spectrum 共b兲of a laser with an oblong active factor for an output energy of seven hundred mW. The width of
By substituting yttrium with ytterbium in the crystal lattice of Yb:KYW a result of the identical dimensions of such chemical aspects nearly a hundred% of Yb-doping may very well be achieved. This distinctive characteristic permits ytterbium to take the location of yttrium with nearly no disruption for 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.
Raman, luminescence and transmission spectra expose optical attributes owing for the presence of thulium ions, and therefore the components may be even more analyzed during the scope of laser and luminescence applications.
A substantial brightnessQ-switched oscillator and regenerative amplifier dependant on a twin-crystal Yb:KGW laser
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Significant-electrical power repetitively pulsed ytterbium lasers with supershort pulse width and immediate diode pumping for technological and biomedical applications
Although ytterbium-doped laser acquire media typically show a small quantum defect, ytterbium-doped tungstates let for specially modest values. For example, a 1030-nm Yb:YAG laser would Typically be pumped all around 940 nm, whereas Yb:KGW or Yb:KYW could possibly be most effectively pumped about 981 nm.
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Simultaneously, a shorter laser wavelength could be obtained; it is achievable to operate which has a quantum defect very well beneath one%. Being a consequence, the heat era can be so smaller that this partly compensates the decreased thermal conductivity.