Getting My KGW Crystal To Work
Getting My KGW Crystal To Work
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Sooner or later, an investigation about the spectral get curve of Yb:KGW in the main amplifier is going to be executed beneath cryogenic temperature evolution from 77 K to three hundred K. The Operating temperature might be controlled to understand broader acquire bandwidth and fewer shift on the central wavelength of the principle amplifier.
In conclusion, we shown that undoped scintillator crystals: BGO, GGG, YSO, LSO and LYSO are productive nonlinear materials for broadband SC generation while in the near-infrared and limited-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 created two octave-spanning SC spectra, which Look at to SC spectra made in YAG. These products exhibit really very similar performances to YAG also in terms of threshold and exceptional pump pulse energies for SC era. Having said that, for what issues the likelihood to work at large laser pulse repetition rate, YSO, LSO and LYSO present resilient Procedure only at 10 kHz and rapidly degrade (in a few minutes) at twenty kHz. In addition to the somewhat lower SC generation threshold (169 nJ), GGG demonstrated excellent performance traits inside the small-wave infrared Using the optimal pump pulse Electricity of 464 nJ, which happens to be two periods decreased than in YAG: the biggest crimson-shifted spectral broadening and the best spectral Electrical power density, outperforming KGW and YAG crystals in that component.
Substitution of your Personal computer for a greater one particular or simply a fantastic adjustment with the Computer orientation as well as the utilized high voltage is needed to prevent this phenomenon. A fast pulse picker can be used to Increase the nanosecond-scale contrast on the output primary pulse.
For tungstates, the ytterbium doping concentration can be extremely high without having major quenching since the replaced ions have an incredibly equivalent ion radius, along with the inter-ion distance is fairly substantial.
Another was positioned with its Np -axis parallel Along with the s-polarized course. A comparison was produced concerning a configuration Using the crystals put in exactly the same orientation (
The combined attain is intricate and may be calculated under unique pumping situations due to the quasi-three-degree program habits of your Yb-doped acquire medium. The blueshift, with a single peak from 1037 nm under the similar crystal placement orientation to 1035 nm under the orthogonal crystal placement orientation, could final result within the reabsorption losses at a lengthy wavelength inside the crystal in which the laser polarization is parallel to its Nm -axis, earning the acquire at 1035 nm larger than that at 1037 nm less than orthogonal orientation.
]. This method was depending on The point that the spectral emission cross-section curves differ from one another when laser polarization is paralleled to the different optical axis of Yb-doped double tungstates[
The red-shifted Section of the SC spectrum in BGO has the bottom spectral Electricity density, which can be one–2 orders of magnitude reduce than in the remainder of the supplies. On the other hand, incredibly reduced Electrical power threshold of SC generation, in addition to minimal ideal pump Electrical power in BGO, need to be identified. The estimated spectral Vitality densities manufactured in LSO and LYSO are rather similar to YAG throughout the main Element of the SC spectrum. One of the most appealing obtaining in that regard is GGG crystal, which, Inspite of extremely reasonable blue-shifted spectral broadening, makes the most important spectral crimson-change and the highest spectral Power density during the 1600�?000 nm selection, which is sort of an order of magnitude increased than that manufactured in YAG.
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