Facts About KYW Crystal Revealed
Facts About KYW Crystal Revealed
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The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, when compared to its counterpart Yb:KGW, is really a exceptional substance that performs a significant purpose in laser technology. Its primary function is to generate ultrashort pulses of sunshine, spanning just a couple hundred femtoseconds.
The Yb:KYW crystal’s proficiency in mild absorption at all over 981 nm makes the crystal like minded for diode pumping. It truly is further enhanced by its exceptional effectiveness in this process, coupled with its lower quantum defect.
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This paper describes a femtosecond laser regenerative amplifier according to two Yb:KYW crystals with immediate longitudinal pumping by strong linear arrays of semiconductor injection lasers getting fiber output. To circumvent spectral narrowing for the duration of amplification as well as the corresponding lengthening of the amplified pulse when it truly is compressed, a mix of two Yb:KYW crystals had been utilised, with the spectral maxima in the amplification shifted relative to one another and with spectral profiling of your amplified radiation.
Right after air drying and subsequent cleansing that has a cotton fabric soaked in alcohol, the movie area showed no signs of peeling or scratches.
FIG. one. Optical format of a laser with immediate pumping With all the radiation of semiconductor injection lasers. LD is definitely an IPG Photonics laser diode with fiber output
five mm other than the middle in the beam caustic. In an effort to Check out the method matching simulation, we performed the experiment with Ng-cut crystal oscillator, which was made Beforehand As well as in a very same problem with simulation [eleven]. As proven in Determine 3(b) with pink dots and KYW Crystal line, the CW output electricity is highly depending on the place of laser crystal as well as experimental outcome coincides very well with simulation outcome. For a Be aware, multimode operation happened 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 while in the displacement location down below 3.5 mm.
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By substituting yttrium with ytterbium inside the crystal lattice of Yb:KYW because of the identical measurements of such chemical factors nearly one hundred% of Yb-doping can be attained.
Though ytterbium-doped laser attain media usually show a little quantum defect, ytterbium-doped tungstates allow for for particularly small values. One example is, 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 attributes has considerably-reaching implications, particularly in the construction of compact still powerfull lasers.
The polarized absorption spectra of Tm3+-doped potassium yttrium tungstate (Tm:KY(WO4)two) crystal at room temperature had been measured. The emission spectrum and life time of your 3 F 4 fired up condition ended up identified. Applying regular and modified Judd–Ofelt theories, the intensity parameters along with the radiative lifetimes ended up calculated and fantastic settlement While using the experimental success was attained for both of those theories.
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