KGW Crystal Things To Know Before You Buy
KGW Crystal Things To Know Before You Buy
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The thermal conductivity of common double tungstates is on the buy to 3–four W/(K m) �?which is not terrible in contrast with other laser crystals (While quite a few instances fewer than for YAG), and pretty substantial compared With all the thermal conductivity of normal Eyeglasses.
The get bandwidth e.g. of Yb:KGW and Yb:KYW is quite large in comparison with that of Yb:YAG. This permits for vast wavelength tunability and for A lot shorter pulse durations from method-locked lasers. Values well under one hundred fs happen to be attained with passive manner locking.
In conclusion, we demonstrated that undoped scintillator crystals: BGO, GGG, YSO, LSO and LYSO are economical nonlinear components for broadband SC era from the in the vicinity of-infrared and quick-wave infrared spectral ranges, when pumped by a hundred and eighty fs essential harmonic pulses from an amplified Yb:KGW laser. YSO, LSO and LYSO made two octave-spanning SC spectra, which Evaluate to SC spectra generated in YAG. These resources exhibit rather very similar performances to YAG also regarding threshold and optimum pump pulse energies for SC technology. Even so, for what worries the possibility to work at higher laser pulse repetition level, YSO, LSO and LYSO demonstrate durable operation only at 10 kHz and speedily degrade (within a few minutes) at twenty kHz. In addition to the relatively lower SC technology threshold (169 nJ), GGG demonstrated fantastic performance qualities inside the small-wave infrared Using the optimum pump pulse Strength of 464 nJ, and that is two situations lower than in YAG: the largest purple-shifted spectral broadening and the very best spectral Power density, outperforming KGW and YAG crystals in that element.
-switched method. The bandwidth during the orthogonal orientation was Evidently A great deal broader. The calculated Fourier remodel restricted pulse duration was as small as sub-160 fs. Underneath the configuration exactly where the two crystals were put in the same orientation, Using the seed input, the amplified pulse bandwidth was only three nm with a hundred and eighty μJ Electricity when it broke the dichroic mirrors.
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However, after Nd3+:YAG became commercially offered, the desire in CaWO4 dropped sharply. In later yrs, particular other tungstate crystals started to appeal to loads of interest.
Comparison of spectral Electrical power densities of supercontinua manufactured while in the ailments of ideal pumping while in the investigated components.
The actual spectra had been reconstructed by correcting the measured spectra by having an account with the filter transmission features and for that sensitivity capabilities of your spectrometers at the data submit-processing stage. The spectral dynamics in Every sample was measured by good tuning the pump pulse Power with a computer-managed attenuator which was integrated while in the laser technique. Thermal Strength meter EM (Ophir 3A-PF-12) was used to evaluate the SC Electricity which was thereafter accustomed to compute the spectral Strength density in the SC radiation. Many of the measurements ended up carried click here out with none translation on the sample with respect to your pump beam.
Figure four Beam radius variation on the two crystals although altering the focal duration with the thermal lensing result.
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-switched laser output beneath the two crystal placement configurations. The black line denotes the configuration With all the crystals put in precisely the same orientation, whilst the pink line is beneath the configuration of crystals put in orthogonal orientation.
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KGW crystals are utilised as Raman scattering resources simply because they have robust Raman scattering in a range of different wavelengths. Any time a laser beam is directed onto the crystal, the photons from the laser beam communicate with the crystal lattice, causing a lot of the photons to scatter in a unique path.