Fascination About KYW Crystal
Fascination About KYW Crystal
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The Yb:KYW crystal’s proficiency in light absorption at about 981 nm tends to make the crystal well suited for diode pumping. It's even more Increased by its outstanding effectiveness in this method, coupled with its reduced quantum defect.
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This paper describes a femtosecond laser regenerative amplifier based on two Yb:KYW crystals with immediate longitudinal pumping by potent linear arrays of semiconductor injection lasers owning fiber output. To avoid spectral narrowing during amplification along with the corresponding lengthening of the amplified pulse when it truly is compressed, a combination of two Yb:KYW crystals have been made use of, Together with the spectral maxima of the amplification shifted relative to each other and with spectral profiling with the amplified radiation.
Ahead of the event of Nd:YAG, Nd3+:CaWO4 was a very important unusual-earth-doped laser achieve medium. It absolutely was actually Utilized in the main constantly working crystal laser.
FIG. one. Optical structure of the laser with direct pumping With all the radiation of semiconductor injection lasers. LD is surely an IPG Photonics laser diode click here with fiber output
five mm aside from the middle from the beam caustic. So as to check the mode matching simulation, we executed the experiment with Ng-Lower crystal oscillator, which was made Formerly As well as in a identical problem with simulation [eleven]. As revealed in Determine 3(b) with pink dots and line, the CW output electric power is extremely dependent on the placement of laser crystal along with the experimental final result coincides very well with simulation result. For a Take note, multimode operation transpired in experiment once the dimension on the pump beam is much larger than TEM00 cavity manner and it leads to larger CW output electric power while in the displacement region under three.five mm.
For tungstates, the ytterbium doping focus can be quite high devoid of considerable quenching as the changed ions have an extremely related ion radius, as well as the inter-ion distance is fairly big.
However, at the time Nd3+:YAG turned commercially obtainable, the desire in CaWO4 dropped sharply. In later on decades, sure other tungstate crystals started to bring in a lot of awareness.
While ytterbium-doped laser obtain media normally show a little quantum defect, ytterbium-doped tungstates enable for specially modest values. One example is, a 1030-nm Yb:YAG laser would Commonly be pumped all around 940 nm, While Yb:KGW or Yb:KYW might be most competently pumped all-around 981 nm.
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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 lifetime of the 3 File 4 psyched state ended up determined. Making use of regular and modified Judd–Ofelt theories, the depth parameters plus the radiative lifetimes had been calculated and superior arrangement with the experimental benefits was obtained for both theories.
Inquire RP Photonics for virtually any tips concerning tungstate lasers, together with femtosecond lasers and substantial-energy lasers.