Rumored Buzz on KYW Crystal
Rumored Buzz on KYW Crystal
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The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, in comparison with its counterpart Yb:KGW, is actually a remarkable product that performs a significant purpose in laser technological know-how. Its Major perform would be to deliver ultrashort pulses of sunshine, spanning just a few hundred femtoseconds.
We current a dual-crystal Yb:KGW laserthat iscapable to function to be a Q-switched oscillator with output electrical power as many as 24 W and pulse duration of twenty ns,or to be a regenerative amplifier with output electricity up to 21 W and pulse period down below two hundred fs after compression of chirped pulses. Both equally lasers have fantastic beam excellent with beam parameter M2
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Optical layout of the laser with direct 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 usually a 50 percent-wave plate, CL is really a collimating lens, FL is usually a focusing lens, AE is an Energetic element constructed from an Yb:KYW crystal, DM is actually a spherical dichroic mirror, M1-M6 are classified as the cavity mirrors, OC will be the output mirror, and SAM can be a semiconductor saturable-absorber mirror.
Right before the development of Nd:YAG, Nd3+:CaWO4 was a vital uncommon-earth-doped laser acquire medium. It was in truth used in the 1st continuously operating crystal laser.
FIG. 1. Optical structure of the laser with immediate pumping While using the radiation of semiconductor injection lasers. LD is really an IPG Photonics laser diode with fiber output
5 mm in addition to the center with the beam caustic. In order to Look at the mode matching simulation, we done the experiment with Ng-Reduce crystal oscillator, which was developed previously and in a very same ailment with simulation [11]. As revealed in Determine 3(b) with crimson dots and line, the CW output electrical power is highly depending on the place of laser crystal as well as the experimental result coincides very well with simulation outcome. To be a Notice, multimode Procedure occurred in experiment in the event the dimension of your pump beam is greater than TEM00 cavity manner and it will cause greater CW output ability within website the displacement region underneath three.five mm.
... at half-peak were being created in the learn oscillator with selfsynchronization from the axial modes, described in our previously article. 21 The new version from the laser, in contrast to that explained within our before short article, utilised an Yb:KYW crystal with the N pcut (optical axis N p of your index ellipsoid was parallel into the propagation direction of your laser radiation), Along with the polarization in the created radiation directed along the N m axis.
... Don't just the position of crystal inside the cavity and also the amplification axis of crystal impacts the laser operation drastically, since the absorption and emission cross sections on the crystal are pretty distinctive in accordance with the orientation of your crystal.
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This tandem of characteristics has far-achieving implications, specially in the development of compact but powerfull lasers.
The polarized absorption spectra of Tm3+-doped potassium yttrium tungstate (Tm:KY(WO4)2) crystal at room temperature have been calculated. The emission spectrum and life span from the 3 F four psyched state had been decided. Applying standard and modified Judd–Ofelt theories, the depth parameters as well as radiative lifetimes were calculated and great agreement Together with the experimental effects was received for both equally theories.
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