KYW Crystal Options
KYW Crystal Options
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The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, in comparison to its counterpart Yb:KGW, is actually a exceptional content that plays a vital position in laser know-how. Its Most important purpose should be to produce ultrashort pulses of light, spanning just some hundred femtoseconds.
The Yb:KYW crystal’s proficiency in light-weight absorption at close to 981 nm tends to make the crystal compatible for diode pumping. It is further enhanced by its amazing efficiency in this method, coupled with its very low quantum defect.
FIG. 4. Autocorrelation perform of the pulse 共a兲and spectrum 共b兲of a laser with a rectangular active component for an output 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 acquiring fiber output. To forestall spectral narrowing through amplification along with the corresponding lengthening of your amplified pulse when it can be compressed, a combination of two Yb:KYW crystals were applied, With all the spectral maxima of the amplification shifted relative to one another and with spectral profiling from the amplified radiation.
In advance of the development of Nd:YAG, Nd3+:CaWO4 was a vital rare-earth-doped laser achieve medium. It absolutely was actually Utilized in the 1st continuously working crystal laser.
FIG. 1. Optical format of the laser with direct pumping Using the radiation of semiconductor injection lasers. LD is an IPG Photonics laser diode with fiber output
five mm other than the middle with the beam caustic. So as to Check out the mode matching simulation, we performed the experiment with Ng-Slash crystal oscillator, which was made Earlier and in a exact issue with simulation [11]. As shown in Figure three(b) with crimson dots and line, the CW output power is extremely depending on the placement of laser crystal and the experimental final result coincides effectively with simulation final result. Like a Take note, multimode operation transpired in experiment in the event the size on the pump beam is larger than TEM00 cavity mode and it brings about bigger CW output energy inside the here displacement area underneath three.five mm.
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By substituting yttrium with ytterbium in the crystal lattice of Yb:KYW a result of the equivalent sizes of those chemical aspects as many as one hundred% of Yb-doping could possibly be realized.
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The polarized absorption spectra of Tm3+-doped potassium yttrium tungstate (Tm:KY(WO4)two) crystal at home temperature were measured. The emission spectrum and lifetime on the three File four energized point out were determined. Making use of normal and modified Judd–Ofelt theories, the intensity parameters along with the radiative lifetimes ended up calculated and fantastic settlement With all the experimental outcomes was obtained for both theories.
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