5 Simple Statements About KYW Crystal Explained
5 Simple Statements About KYW Crystal Explained
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The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, in comparison to its counterpart Yb:KGW, is a exceptional product that plays an essential position in laser technological know-how. Its Main functionality is usually to produce ultrashort pulses of sunshine, spanning just a couple hundred femtoseconds.
We present a dual-crystal Yb:KGW laserthat iscapable to work as a Q-switched oscillator with output ability approximately 24 W and pulse duration of twenty ns,or for a regenerative amplifier with output electricity as many as 21 W and pulse duration under two hundred fs right after compression of chirped pulses. Equally lasers have excellent beam quality with beam parameter M2
FIG. four. Autocorrelation operate of the pulse 共a兲and spectrum 共b兲of a laser with an oblong active factor for an output electricity of 700 mW. The width of
This paper describes a femtosecond laser regenerative amplifier based on two Yb:KYW crystals with direct longitudinal pumping by effective linear arrays of semiconductor injection lasers owning fiber output. To forestall spectral narrowing during amplification as well as the corresponding lengthening of the amplified pulse when it's compressed, a combination of two Yb:KYW crystals have been applied, with the spectral maxima from the amplification shifted relative to one another and with spectral profiling in the amplified radiation.
The monoclinic crystal structures leads to a all-natural birefringence, assisting to stay away from thermally induced polarization rotation and depolarization decline.
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5 mm besides the middle from the beam caustic. As a way to check the mode matching simulation, we done the experiment with Ng-Lower crystal oscillator, which was created previously and in a exact same condition with simulation [11]. As revealed in Determine three(b) with pink dots and line, the CW output power is extremely dependent on the position of laser crystal and the experimental outcome coincides well with simulation final result. Like a note, multimode operation happened in experiment if the dimension with check here the pump beam is greater than TEM00 cavity method and it causes larger CW output ability inside the displacement location below 3.five mm.
... at 50 %-height have been created inside of a master oscillator with selfsynchronization in the axial modes, explained inside our before post. 21 The new version on the laser, compared with that explained inside our previously short article, made use of an Yb:KYW crystal with an N pcut (optical axis N p of the index ellipsoid was parallel towards the propagation route on the laser radiation), Along with the polarization with the produced radiation directed along the N m axis.
By substituting yttrium with ytterbium from the crystal lattice of Yb:KYW because of the equivalent dimensions of such chemical features as much as 100% of Yb-doping could possibly be attained.
Though ytterbium-doped laser achieve media generally show a little quantum defect, ytterbium-doped tungstates enable for particularly modest values. For instance, a 1030-nm Yb:YAG laser would Commonly be pumped about 940 nm, While Yb:KGW or Yb:KYW can be most effectively pumped all around 981 nm.
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The polarized absorption spectra of Tm3+-doped potassium yttrium tungstate (Tm:KY(WO4)two) crystal at place temperature had been calculated. The emission spectrum and lifetime with the 3 File four fired up point out had been identified. Making use of conventional and modified Judd–Ofelt theories, the depth parameters plus the radiative lifetimes had been calculated and fantastic agreement Using the experimental effects was obtained for both theories.
At the same time, a shorter laser wavelength is usually attained; it is possible to work that has a quantum defect very well under one%. Being a consequence, the warmth generation can be so small that this partly compensates the lessen thermal conductivity.