KYW Crystal No Further a Mystery
KYW Crystal No Further a Mystery
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This special attribute of ultrafast pulses enables nonlinear optical interaction with tissue at low overall publicity, and drives programs for example deep-tissue multiphoton microscopy and large-precision eye surgical procedures
Femtosecond laser based upon Yb:KYW crystals with suppression of spectral narrowing in a very regenerative amplifier by spectral profiling of the pulse
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By substituting yttrium with ytterbium during the crystal lattice of Yb:KYW mainly because of the very similar measurements of these chemical aspects approximately a hundred% of Yb-doping could be obtained. This unique characteristic permits ytterbium to take the area of yttrium with just about no disruption on the crystal’s lattice.
The monoclinic crystal structures brings about a purely natural birefringence, assisting to keep away from thermally induced polarization rotation and depolarization reduction.
FIG. one. Optical structure of a laser with immediate pumping Together with the radiation of semiconductor injection lasers. LD is really an IPG Photonics laser diode with fiber output
5 mm besides the center of the beam caustic. In order to Check out the mode matching simulation, we executed the experiment with Ng-Slash crystal oscillator, which was created Earlier As well as in a identical ailment with simulation [11]. As proven in Figure three(b) with crimson dots and line, the CW output energy is extremely dependent on the placement of laser crystal as well as the experimental end result coincides properly with simulation end result. As being a Be aware, multimode Procedure transpired in experiment if the dimensions from the pump beam is bigger than TEM00 cavity manner and it causes bigger CW output energy within the displacement location down below three.5 mm.
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... Not just the posture of crystal during the cavity but will also the amplification axis of crystal impacts the laser Procedure drastically, since the absorption and emission cross sections with the crystal are rather various based on the orientation with the crystal.
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The polarized absorption spectra of Tm3+-doped potassium yttrium tungstate (Tm:KY(WO4)2) crystal at area temperature ended up measured. The emission spectrum and lifetime in the three F four psyched point out ended up established. Applying conventional and modified Judd–Ofelt theories, the intensity parameters plus the radiative lifetimes have been calculated and good arrangement Together with the experimental results was attained for both of those theories.
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