A Simple Key For KGW Crystal Unveiled
A Simple Key For KGW Crystal Unveiled
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The obtain bandwidth e.g. of Yb:KGW and Yb:KYW is very large as opposed with that of Yb:YAG. This permits for extensive wavelength tunability and for A lot shorter pulse durations from mode-locked lasers. Values nicely below a hundred fs are already reached with passive method locking.
In conclusion, we demonstrated that undoped scintillator crystals: BGO, GGG, YSO, LSO and LYSO are effective nonlinear resources for broadband SC technology from the in the vicinity of-infrared and brief-wave infrared spectral ranges, when pumped by one hundred eighty fs basic harmonic pulses from an amplified Yb:KGW laser. YSO, LSO and LYSO made two octave-spanning SC spectra, which compare to SC spectra produced in YAG. These supplies show quite very similar performances to YAG also with regard to threshold and optimum pump pulse energies for SC technology. Even so, for what concerns the likelihood to work at high laser pulse repetition price, YSO, LSO and LYSO demonstrate sturdy operation only at 10 kHz and swiftly degrade (within just a few minutes) at twenty kHz. In addition to the comparatively small SC generation threshold (169 nJ), GGG shown outstanding functionality properties inside the limited-wave infrared With all the optimum pump pulse Electricity of 464 nJ, which can be two instances lower than in YAG: the largest red-shifted spectral broadening and the best spectral Power density, outperforming KGW and YAG crystals in that facet.
], but it might increase way more cost to this ingredient. The intra-cavity spectral get curve may be modulated by inserting an etalon that cuts down the actual gain for the wavelength with the maximum gain component[
The calculated Lower-off wavelengths on the shorter-wavelength facet are in keeping with the general development of blue-shifted spectral broadening to the bandgap of nonlinear content. Every one of the nonlinear materials made acceptable pink-shifted spectral broadenings beneath conditions of best pump pulse energies, with the biggest red-shift exceeding 2000 nm calculated in GGG crystal. Our results disclosed that GGG and BGO (which also had the bottom supercontinuum generation threshold) give long lasting, optical damage-free overall performance at a laser repetition amount of 200 kHz, suggesting that these components are very good alternate options to YAG and KGW for low threshold, superior regular electric power supercontinuum era during the in close proximity to- and quick-wave infrared spectral ranges. We also shown that scintillating Qualities of bulk elements might be readily examined from the filamentation routine, by way of multiphoton excitation making use of around-infrared femtosecond laser pulses.
The other was placed with its Np -axis parallel Along with the s-polarized direction. A comparison was manufactured concerning a configuration While using the crystals placed in precisely the same orientation (
Dynamic expression of genes encoding subunits of inward rectifier potassium (Kir) channels during the yellow fever mosquito Aedes aegypti.
Thermal outcomes are substantially scaled-down in KGW. This combined with the high harm threshold make the crystal a superb applicant for electric power scaling. Evaluating Ba(NO3)two and KGW for Raman software Ba(NO3)two are more effective in case of ns pulses and KGW �?in case of ps pulses.
The edge Power for SC era (hbox E _ textrm th ) was described because the pump pulse Strength, in which the blue-shifted spectral broadening swiftly settles to a specific Slice-off wavelength That is still Just about continuous even with additional boost with the pump pulse Strength. The ideal Electricity (hbox E _textrm choose ), was described given that the pump pulse Strength, which creates the largest crimson-shifted spectral broadening ahead of the onset of periodic modulation in the SC spectrum as a result of filament refocusing.
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-switched laser output underneath the two crystal placement configurations. The black line denotes the configuration with the crystals placed in the exact same orientation, though the red line is under the configuration of crystals put in orthogonal orientation.
Figure four Beam radius variation on the two crystals while modifying the focal duration from the thermal lensing outcome.
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