Getting My KYW Crystal To Work
Getting My KYW Crystal To Work
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The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, when compared with its counterpart Yb:KGW, is usually a impressive product that plays a vital role in laser technological innovation. Its Most important perform is usually to deliver ultrashort pulses of light, spanning only a few hundred femtoseconds.
time. Crystals with the compound melts congruently at 1007 oC, on the other hand soften crystallization of top of the range crystal is difficult because of period changeover at ~920 oC. The very best seeded Resolution process from
The absorption and emission spectra of Yb:KYW Crystals Exhibit potent peaks at 980 nm and 1030 nm, respectively, guaranteeing effective Strength conversion and substantial effectiveness in laser techniques.
Optical format of a laser with immediate pumping With all the radiation of semiconductor injection lasers. LD is surely an IPG Photonics laser diode with fiber output of the radiation, WP is often a half-wave plate, CL is often a collimating lens, FL is actually a focusing lens, AE is really an Energetic ingredient constructed from an Yb:KYW crystal, DM is often a spherical dichroic mirror, M1-M6 will be the cavity mirrors, OC is the output mirror, and SAM is really a semiconductor saturable-absorber mirror.
In advance of the development of Nd:YAG, Nd3+:CaWO4 was an important scarce-earth-doped laser obtain medium. It had been in truth Employed in the very first repeatedly functioning crystal laser.
FIG. one. Optical format of a laser with immediate pumping While using the radiation of semiconductor injection lasers. LD is an IPG Photonics laser diode with fiber output
5 mm aside from the middle of the beam caustic. In an effort to check the mode matching simulation, we done the experiment with Ng-cut crystal oscillator, which was made Formerly As well as in a exact same affliction with simulation [11]. As demonstrated in Determine 3(b) with pink dots and line, the CW output ability is highly depending on the position of laser crystal along with the experimental final result coincides effectively with simulation consequence. As being a Notice, multimode Procedure happened in experiment once the dimensions of your pump beam is greater than TEM00 cavity method and it results in greater CW output electricity from the displacement location down below 3.5 mm.
... at 50 percent-top have been created within a learn oscillator with selfsynchronization from the axial modes, explained inside our earlier short article. 21 The new version in the laser, compared with that described within our before post, utilised an Yb:KYW crystal having an N pcut (optical axis N p in the index ellipsoid was parallel on the propagation way of the laser radiation), With all the polarization with the created radiation directed along the N m axis.
By substituting yttrium with ytterbium during the crystal lattice of Yb:KYW mainly because of the very similar measurements of these chemical components up to a hundred% of Yb-doping may very well be reached.
Though ytterbium-doped laser get media generally show a little quantum defect, ytterbium-doped tungstates allow for for particularly smaller values. As an example, a 1030-nm Yb:YAG laser would Usually be pumped all over 940 nm, While Yb:KGW or Yb:KYW could be most competently pumped close to 981 nm.
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