KYW Crystal No Further a Mystery
KYW Crystal No Further a Mystery
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In functional phrases, the Yb:KYW crystal has observed its area of interest in higher-electric power laser purposes on account of its ability to produce higher Vitality ultrashort laser pulses whilst keeping a compact dimension. The interplay of its options �?seamless ytterbium substitution, potent absorption attributes, ultrashort pulse era and effectiveness in energy conversion �?positions the Yb:KYW crystal to be a cornerstone within the laser engineering, covering numerous fields starting from scientific research to industrial applications.
This special attribute of ultrafast pulses allows nonlinear optical conversation with tissue at very low overall publicity, and drives applications like deep-tissue multiphoton microscopy and large-precision eye surgical procedure
The Yb:KYW crystal’s proficiency in mild absorption at all over 981 nm makes the crystal compatible for diode pumping. It truly is further more Improved by its outstanding efficiency in this method, coupled with its minimal quantum defect.
FIG. four. Autocorrelation operate of the heart beat 共a兲and spectrum 共b兲of the laser with a rectangular Energetic element for an output power of 700 mW. The width of
By substituting yttrium with ytterbium during the crystal lattice of Yb:KYW mainly because of the identical dimensions of these chemical components around a hundred% of Yb-doping could possibly be attained. This exceptional attribute permits ytterbium to go ahead and take location of yttrium with pretty much no disruption into the crystal’s lattice.
The monoclinic crystal buildings ends in a all-natural birefringence, helping to stay clear of thermally induced polarization rotation and depolarization reduction.
FIG. 1. Optical format of the laser with immediate pumping Along with the radiation of semiconductor injection lasers. LD is undoubtedly an IPG Photonics laser diode with fiber output
five mm in addition to the middle on the beam caustic. So as to Look at the manner matching simulation, we executed the experiment with Ng-Slice crystal oscillator, which was formulated Earlier and in a similar issue with simulation [eleven]. As revealed in Figure three(b) with pink dots and line, the CW output power is highly dependent on the situation of laser crystal as well as the experimental consequence coincides effectively with simulation outcome. Being a Be aware, multimode operation happened in experiment in the event the dimensions of your pump beam is larger than TEM00 cavity mode and it brings about bigger CW output power during the displacement area under three.five mm.
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... Not just the placement of crystal inside the cavity but in addition the amplification axis of crystal impacts the laser operation tremendously, because the absorption and emission cross sections from the crystal are fairly distinctive in accordance with the orientation of your crystal.
While ytterbium-doped laser obtain media frequently show a small quantum defect, ytterbium-doped tungstates allow for notably small values. One example is, a 1030-nm Yb:YAG laser would Usually be pumped all around 940 nm, Whilst Yb:KGW or Yb:KYW could possibly be most competently pumped about 981 nm.
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The polarized absorption spectra of Tm3+-doped potassium yttrium tungstate (Tm:KY(WO4)2) crystal at room temperature ended up measured. The emission spectrum and life time of the three File 4 psyched state ended up established. Working with regular and modified Judd–Ofelt theories, the depth parameters and also the radiative lifetimes ended up calculated and good arrangement While using the experimental final results was attained for each theories.
At the same time, a shorter laser wavelength could be received; it can be done to work with a quantum defect effectively under one%. For a consequence, more info the warmth technology can be so little that this partly compensates the reduced thermal conductivity.