Fascination About KYW Crystal
Fascination About KYW Crystal
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The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, compared to its counterpart Yb:KGW, is really a exceptional content that performs a significant purpose in laser technological know-how. Its primary function is to generate ultrashort pulses of light, spanning only a few hundred femtoseconds.
The Yb:KYW crystal’s proficiency in mild absorption at all-around 981 nm helps make the crystal compatible for diode pumping. It is actually additional Improved by its impressive effectiveness in this method, coupled with its very low quantum defect.
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This paper describes a femtosecond laser regenerative amplifier depending on two Yb:KYW crystals with direct longitudinal pumping by potent linear arrays of semiconductor injection lasers getting fiber output. To prevent spectral narrowing all through amplification as well as corresponding lengthening on the amplified pulse when it really is compressed, a mix of two Yb:KYW crystals had been used, Along with the spectral maxima in the amplification shifted relative to one another and with spectral profiling in the amplified radiation.
After air drying and subsequent cleaning which has a cotton cloth soaked in Alcoholic beverages, the film floor confirmed no signs of peeling or scratches.
PDF Yb:KGW and Yb:KYW crystals have broad emission bandwidths and are made use of as lasing products to crank out ultrashort (~ one hundred-two hundred fs) substantial electrical power pulses. Immediate pump of Yb:KGW/KYW crystals with laser diodes working at 981 nm supports compact laser systems.
5 mm apart from the middle with the beam caustic. So as to Check out the mode matching simulation, we executed the experiment with Ng-cut crystal oscillator, website which was created Beforehand As well as in a exact same condition with simulation [eleven]. As shown in Determine 3(b) with purple dots and line, the CW output electrical power is very dependent on the posture of laser crystal along with the experimental result coincides very well with simulation outcome. For a note, multimode operation transpired in experiment when the measurement of your pump beam is bigger than TEM00 cavity method and it leads to increased CW output ability within the displacement area under three.five mm.
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... Not merely the place of crystal from the cavity but additionally the amplification axis of crystal impacts the laser operation greatly, since the absorption and emission cross sections of the crystal are rather distinct according to the orientation in the crystal.
Although ytterbium-doped laser obtain media generally show a little quantum defect, ytterbium-doped tungstates let for notably little values. As an example, a 1030-nm Yb:YAG laser would Usually be pumped around 940 nm, Whilst Yb:KGW or Yb:KYW could possibly be most effectively pumped all-around 981 nm.
This tandem of characteristics has far-achieving implications, especially in the construction of compact but powerfull lasers.
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