The smart Trick of KYW Crystal That Nobody is Discussing
The smart Trick of KYW Crystal That Nobody is Discussing
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Femtosecond laser based upon Yb:KYW crystals with suppression of spectral narrowing in a very regenerative amplifier by spectral profiling of the pulse
FIG. 4. Autocorrelation function of the heartbeat 共a兲and spectrum 共b兲of the laser with a rectangular active aspect for an output energy of seven hundred mW. The width of
By substituting yttrium with ytterbium inside the crystal lattice of Yb:KYW as a result of identical dimensions of such chemical features up to a hundred% of Yb-doping could be achieved. This distinctive characteristic permits ytterbium to go ahead and take position of yttrium with nearly no disruption to your crystal’s lattice.
Right before the event of Nd:YAG, Nd3+:CaWO4 was a vital uncommon-earth-doped laser get medium. It absolutely was in reality Utilized in the main continually running crystal laser.
FIG. 1. Optical format of a laser with immediate pumping with the radiation of semiconductor injection lasers. LD is surely an IPG Photonics laser diode with fiber output
Tungstates are inclined to acquire superior Raman coefficients (�?Raman scattering). Therefore, they're able to create considerable Raman obtain at average optical intensities. It is feasible to use the laser crystal alone to be a Raman converter.
... at fifty percent-height were created inside of a grasp oscillator with selfsynchronization on the axial modes, described inside our previously post. 21 The new edition in the laser, not like that described inside our previously short article, employed an Yb:KYW crystal with an N pcut (optical axis N p with the index ellipsoid was parallel towards the propagation course from the laser radiation), Together with the polarization of the produced radiation directed alongside the N m axis.
Nonetheless, the moment Nd3+:YAG turned commercially accessible, the fascination in CaWO4 dropped sharply. In later on yrs, certain other tungstate crystals started to entice a great deal of notice.
While ytterbium-doped laser acquire media typically exhibit a little quantum defect, ytterbium-doped tungstates make it possible for for particularly little values. As an click here example, a 1030-nm Yb:YAG laser would Typically be pumped close to 940 nm, whereas Yb:KGW or Yb:KYW might be most effectively pumped close to 981 nm.
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Yb:KYW crystal (Yb-doped potassium yttrium tungstate) when compared to its counterpart Yb:KGW, is actually a impressive content that plays an essential function in laser technologies. Its Main perform will be to produce ultrashort pulses of sunshine, spanning just a few hundred femtoseconds.
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