KYW Crystal - An Overview
KYW Crystal - An Overview
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The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, compared to its counterpart Yb:KGW, is actually a impressive substance that performs a significant job in laser technology. Its primary function is to create ultrashort pulses of sunshine, spanning only a few hundred femtoseconds.
Femtosecond laser based on Yb:KYW crystals with suppression of spectral narrowing within a regenerative amplifier by spectral profiling of the heartbeat
FIG. four. Autocorrelation purpose of the heartbeat 共a兲and spectrum 共b兲of the laser with a rectangular Lively element for an output electrical power of seven-hundred mW. The width of
This paper describes a femtosecond laser regenerative amplifier determined by two Yb:KYW crystals with immediate longitudinal pumping by impressive linear arrays of semiconductor injection lasers owning fiber output. To forestall spectral narrowing through amplification along with the corresponding lengthening on the amplified pulse when it really is compressed, a combination of two Yb:KYW crystals ended up employed, Using the spectral maxima of your amplification shifted relative to each other and with spectral profiling of the amplified radiation.
Immediately after air drying and subsequent cleansing using a cotton fabric soaked in alcohol, the movie surface showed no indications of peeling or scratches.
PDF Yb:KGW and Yb:KYW crystals have wide emission bandwidths and so are employed as lasing components to produce ultrashort (~ a hundred-200 fs) large energy pulses. Immediate pump of Yb:KGW/KYW crystals with laser diodes working at 981 nm supports compact laser systems.
five mm other than the center of the beam caustic. In order to check the manner matching simulation, we executed the experiment with Ng-Slash crystal oscillator, which was formulated Earlier and in a exact issue with simulation [11]. As demonstrated in Figure three(b) with red dots and line, the CW output ability is extremely depending on the situation of laser crystal as well as the experimental result coincides properly with simulation result. For a note, multimode Procedure occurred in experiment if the size in the pump beam is larger sized than TEM00 cavity mode and it brings about bigger CW output electrical power from the displacement location below 3.5 mm.
For tungstates, the ytterbium doping concentration can be extremely large without the need of considerable quenching as the changed ions have an extremely very similar ion radius, and also the inter-ion distance is fairly substantial.
By substituting yttrium with ytterbium in the crystal lattice of Yb:KYW due to the similar dimensions of those chemical components up to one hundred% of Yb-doping could possibly be achieved.
Although ytterbium-doped laser acquire media normally exhibit a little quantum defect, ytterbium-doped tungstates enable for specially little values. For example, a 1030-nm Yb:YAG laser would Usually be pumped around 940 nm, whereas Yb:KGW or Yb:KYW may very well be most efficiently pumped all over 981 nm.
This tandem of characteristics check here has considerably-reaching implications, significantly in the development of compact but powerfull lasers.
The polarized absorption spectra of Tm3+-doped potassium yttrium tungstate (Tm:KY(WO4)2) crystal at space temperature ended up measured. The emission spectrum and life time of your three F 4 fired up condition ended up identified. Using conventional and modified Judd–Ofelt theories, the intensity parameters as well as the radiative lifetimes ended up calculated and superior settlement with the experimental results was obtained for both theories.
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