KYW Crystal Options
KYW Crystal Options
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This exceptional characteristic of ultrafast pulses allows nonlinear optical conversation with tissue at very low Over-all exposure, and drives apps for example deep-tissue multiphoton microscopy and large-precision eye surgery
The Yb:KYW crystal’s proficiency in light-weight absorption at about 981 nm would make the crystal well suited for diode pumping. It truly is additional Improved by its extraordinary efficiency in this process, coupled with its small quantum defect.
FIG. 4. Autocorrelation purpose of the heart beat 共a兲and spectrum 共b兲of the laser with a rectangular Energetic factor for an output electrical power of seven-hundred mW. The width of
Ultrafast lasers, with pulse widths of some picoseconds (10−twelve s) or significantly less, enable enough time resolution expected in laser-fired up fluorescence life time spectroscopy and imaging tactics.Also, they supply higher pulse peak powers at high repetition premiums and moderate average output powers.
The monoclinic crystal buildings brings about a all-natural birefringence, helping to keep away from thermally induced polarization rotation and depolarization loss.
FIG. 1. Optical structure of a laser with direct pumping Along with the radiation of semiconductor injection lasers. LD is undoubtedly an IPG Photonics laser diode with fiber output
5 mm other than the middle with the beam caustic. To be able to Examine the mode matching simulation, we performed the experiment with Ng-Reduce crystal oscillator, which was created Earlier As well as in a same situation with simulation [eleven]. As shown in Figure three(b) with purple dots and line, the CW output electricity is extremely dependent on the position of laser crystal as well as experimental result coincides well with simulation final result. To be a Be aware, multimode operation transpired in experiment if the measurement of your pump beam is larger sized than TEM00 cavity method and it causes bigger CW output electrical power while in the displacement region beneath 3.five mm.
... at 50 %-top were generated in a grasp oscillator with selfsynchronization with the axial modes, described in our earlier post. 21 The new version on the laser, compared with that described within our previously short article, used an Yb:KYW crystal with the N pcut (optical axis N p with the index ellipsoid was parallel on the propagation way with the laser radiation), While using the polarization on the generated radiation directed alongside the N m axis.
By substituting yttrium with ytterbium during the crystal lattice of Yb:KYW due to the similar dimensions of such chemical elements up to 100% of Yb-doping could possibly be accomplished.
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The polarized absorption spectra of Tm3+-doped potassium yttrium tungstate (Tm:KY(WO4)2) crystal at place temperature were being measured. The emission spectrum and life time in the 3 F 4 enthusiastic condition have been established. Working with regular and modified Judd–Ofelt theories, the depth parameters plus the radiative lifetimes were calculated and superior settlement Together with the experimental outcomes was obtained for both theories.
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