The Definitive Guide to KGW Crystal
The Definitive Guide to KGW Crystal
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In conclusion, we demonstrated that undoped scintillator crystals: BGO, GGG, YSO, LSO and LYSO are productive nonlinear resources for broadband SC era inside the close to-infrared and brief-wave infrared spectral ranges, when pumped by one hundred eighty fs elementary harmonic pulses from an amplified Yb:KGW laser. YSO, LSO and LYSO generated two octave-spanning SC spectra, which Assess to SC spectra made in YAG. These resources exhibit really equivalent performances to YAG also when it comes to threshold and exceptional pump pulse energies for SC era. Nevertheless, for what concerns the likelihood to operate at high laser pulse repetition price, YSO, LSO and LYSO exhibit tough Procedure only at ten kHz and rapidly degrade (inside of a few minutes) at twenty kHz. Apart from the fairly reduced SC generation threshold (169 nJ), GGG shown excellent performance attributes in the shorter-wave infrared Using the best pump pulse Power of 464 nJ, and that is two occasions decrease than in YAG: the most important pink-shifted spectral broadening and the highest spectral Vitality density, outperforming KGW and YAG crystals in that part.
In contrast, the seed laser can be amplified to around 1 mJ underneath the orthogonal orientation configuration.
The comparison with glasses is suitable For the reason that large achieve bandwidth will allow e.g. tungstate femtosecond lasers and tunable lasers to compete with glass lasers.
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Comparison of spectral Power densities of supercontinua manufactured in the ailments of ideal pumping while in the investigated products.
We plan to spice up the heartbeat Power to above forty mJ in two-phase multi-pass amplifiers, similar to a achieve element of twenty. In Every single amplifier, we will even undertake two cascaded crystals put under orthogonal orientation to reduce the thermal load on Each and every crystal and compensate to the obtain-narrowing result.
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The Martinez stretcher stretched the seed pulses to ~250 ps with 1600 grooves/mm grating. The input with the stretcher (incident angle: 52°) Which from the compressor incident within the grating have been from the very same side; for this reason, a slight angular tuning of the grating may be made to get the most beneficial compression outcome. From the compressor, the enter angle on the grating and the distance amongst the interpretation phase (S1) as well as transmission grating (TG) had been intended to compensate for that stretcher dispersion and all dispersion released from the components.
The Yb:KGW laser method has a quasi-three-amount conduct. The online acquire of your Yb:KGW crystal was not substantial: a number of tens of roundtrips were being necessary to amplify the nanojoule seed to the millijoule amount. Therefore, the get-narrowing effect was inevitable in Yb:KGW regenerative amplifiers.
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Assembling tungsten oxide hydrate nanocrystal colloids shaped by laser ablation in liquid into rapidly-response electrochromic movies.