The smart Trick of KYW Crystal That Nobody is Discussing
The smart Trick of KYW Crystal That Nobody is Discussing
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The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, in comparison with its counterpart Yb:KGW, is often a extraordinary content that plays a crucial position in laser know-how. Its Most important functionality is to generate ultrashort pulses of sunshine, spanning just a couple hundred femtoseconds.
The Yb:KYW crystal’s proficiency in mild absorption at about 981 nm makes the crystal well suited for diode pumping. It can be further more Increased by its amazing performance in this method, coupled with its low quantum defect.
FIG. 4. Autocorrelation operate of the heartbeat 共a兲and spectrum 共b兲of a laser with a rectangular Energetic aspect for an output ability of 700 mW. The width of
This paper describes a femtosecond laser regenerative amplifier according to two Yb:KYW crystals with direct longitudinal pumping by impressive linear arrays of semiconductor injection lasers owning fiber output. To forestall spectral narrowing for the duration of amplification along with the corresponding lengthening from the amplified pulse when it truly is compressed, a combination of two Yb:KYW crystals were applied, Together with the spectral maxima of the amplification shifted relative to one another and with spectral profiling of the amplified radiation.
Just after air drying and subsequent cleaning that has a cotton cloth soaked in Liquor, the movie surface confirmed no indications of peeling or scratches.
PDF Yb:KGW and Yb:KYW crystals have wide emission bandwidths and they are utilised as lasing components to create ultrashort (~ a hundred-200 fs) high electric power pulses. Direct pump of Yb:KGW/KYW crystals with laser diodes functioning at 981 nm supports compact laser programs.
five mm other than the center of the beam caustic. In order to Look more info at the method matching simulation, we performed the experiment with Ng-Slash crystal oscillator, which was formulated Formerly As well as in a similar problem with simulation [eleven]. As proven in Determine 3(b) with crimson dots and line, the CW output energy is very dependent on the situation of laser crystal as well as the experimental final result coincides effectively with simulation final result. Like a Take note, multimode operation transpired in experiment if the size in the pump beam is larger sized than TEM00 cavity mode and it leads to increased CW output ability while in the displacement region down below three.five mm.
For tungstates, the ytterbium doping focus can be quite higher with no significant quenching since the changed ions have a really comparable ion radius, as well as the inter-ion distance is pretty huge.
By substituting yttrium with ytterbium while in the crystal lattice of Yb:KYW a result of the comparable sizes of those chemical factors up to a hundred% of Yb-doping may be accomplished.
When ytterbium-doped laser attain media generally show a little quantum defect, ytterbium-doped tungstates let for specially compact values. Such as, a 1030-nm Yb:YAG laser would Ordinarily be pumped all-around 940 nm, Whilst Yb:KGW or Yb:KYW may be most proficiently pumped close to 981 nm.
This tandem of characteristics has considerably-reaching implications, notably in the development of compact however powerfull lasers.
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