KYW Crystal No Further a Mystery
KYW Crystal No Further a Mystery
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The attain bandwidth e.g. of Yb:KGW and Yb:KYW is incredibly substantial in contrast with that of Yb:YAG. This allows for broad wavelength tunability and for Significantly shorter pulse durations from method-locked lasers. Values properly beneath a hundred fs have already been accomplished with passive method locking.
The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, as compared to its counterpart Yb:KGW, is usually a outstanding content that performs an important part in laser engineering. Its Principal perform is always to produce ultrashort pulses of sunshine, spanning just a couple hundred femtoseconds.
Femtosecond laser dependant on Yb:KYW crystals with suppression of spectral narrowing in the regenerative amplifier by spectral profiling of the pulse
FIG. 4. Autocorrelation function of the pulse 共a兲and spectrum 共b兲of a laser with a rectangular active component for an output electric power of seven-hundred mW. The width of
By substituting yttrium with ytterbium during the crystal lattice of Yb:KYW a result of the similar dimensions of these chemical elements approximately one hundred% of Yb-doping could possibly be realized. This one of a kind characteristic permits ytterbium to go ahead and take area of yttrium with practically no disruption on the crystal’s lattice.
The monoclinic crystal constructions ends in a organic birefringence, helping to steer clear of thermally induced polarization rotation and depolarization loss.
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Tungstates have a tendency to acquire substantial Raman coefficients (�?Raman scattering). Thus, they are able to make significant Raman attain at moderate optical intensities. It is achievable to use the laser crystal itself like a Raman converter.
... at half-peak have been produced within a master oscillator with selfsynchronization on the axial modes, described in our before short article. 21 The new version of the laser, unlike that explained within our before report, utilised an Yb:KYW crystal with an N pcut (optical axis N p of the index ellipsoid was parallel to your propagation path of the laser radiation), Together with the polarization in the created radiation directed along the N m axis.
... Not merely the situation of crystal while in the cavity but will also the amplification axis of crystal affects the laser operation significantly, because the absorption and emission cross sections on the crystal are rather distinctive in accordance with the orientation of your crystal.
While ytterbium-doped laser achieve media frequently show a little quantum defect, ytterbium-doped tungstates make it possible for for particularly little values. By way of example, a 1030-nm Yb:YAG laser would Typically be pumped close to 940 nm, While Yb:KGW or Yb:KYW may be most successfully pumped all around 981 nm.
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