A Simple Key For KGW Crystal Unveiled
A Simple Key For KGW Crystal Unveiled
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Past work confirmed that the dual-crystal configuration can be used to compensate for the thermal lensing outcome[
Although ytterbium-doped laser obtain media usually exhibit a small quantum defect, ytterbium-doped tungstates let for especially modest values. Such as, a 1030-nm Yb:YAG laser would Generally be pumped all-around 940 nm, Whilst Yb:KGW or Yb:KYW might be most effectively pumped close to 981 nm.
We utilised a transmission grating (TG) as being a dispersive ingredient in our stretcher and compressor. A compact configuration was adopted, wherever the stretcher plus the compressor shared one particular grating similar to that in Ref.
The red-shifted Portion of the SC is of simple importance, especially for what considerations the performance of broadly tunable optical parametric amplifiers pumped by the elemental harmonics of Yb lasers. The shortage of seed photons from the long-wavelength location from the SC spectrum boundaries the amplification performance and ends in pulse-to-pulse Strength fluctuations round the degeneracy region of your optical parametric amplifier. This aspect is quantified in Fig. 6a by plotting the SC spectra with regard to spectral Vitality density, which was approximated by measuring the Electrical power in the axial part of SC radiation (which is the one basically practical Element of SC emission). KGW crystal generates the very best spectral energy density during the 1200�?450 nm array, as famous in the current study30.
The datasets utilized and/or analysed through The existing examine available through the corresponding writer on sensible request.
The calculated cut-off wavelengths for the short-wavelength aspect are according to the final trend of blue-shifted spectral broadening within the bandgap of nonlinear materials. The many nonlinear resources produced sensible crimson-shifted spectral broadenings below circumstances of ideal pump pulse energies, with the most important pink-change exceeding 2000 nm measured in GGG crystal. Our benefits uncovered that GGG and BGO (which also experienced the bottom supercontinuum generation threshold) supply sturdy, optical destruction-cost-free effectiveness in a laser repetition fee of 200 kHz, suggesting that these materials are excellent possibilities to YAG and KGW for lower threshold, high common electric power supercontinuum technology during the in close proximity to- and quick-wave infrared spectral ranges. We also shown that scintillating Qualities of bulk products could possibly be quickly studied inside the filamentation routine, by way of multiphoton excitation employing close to-infrared femtosecond laser pulses.
Quite a few solutions have been adopted to resolve this issue. An acousto-optical programmable dispersive filter is often utilized to modulate the seed’s spectrum to suppress the obtain-narrowing impact[
KGW (potassium gadolinium tungstate) is a crystal that is commonly employed as being a Raman crystal in Raman spectroscopy. It's really a colorless, transparent crystal that features a significant Raman scattering efficiency and a solid Raman spectrum, making it well suited for A variety of Raman apps.
The spectral measurements of filament-induced luminescence propose that scintillating Homes of products might be commonly examined using femtosecond in the vicinity of-infrared light resource via multiphoton excitation while in the filamentation regime, which will allow straightforward separation of excitation and emission wavelengths and very low risk of optical injury.
Figure four Beam radius variation on The 2 crystals though modifying the here focal size from the thermal lensing outcome.
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The Yb:KGW laser process provides a quasi-3-degree habits. The net get on the Yb:KGW crystal was not significant: various tens of roundtrips have been needed to amplify the nanojoule seed to some millijoule degree. As a result, the obtain-narrowing impact was inescapable in Yb:KGW regenerative amplifiers.
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