An Unbiased View of KGW Crystal
An Unbiased View of KGW Crystal
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Previous work confirmed that the twin-crystal configuration can be used to compensate to the thermal lensing outcome[
Though ytterbium-doped laser gain media typically show a small quantum defect, ytterbium-doped tungstates let for specifically compact values. Such as, a 1030-nm Yb:YAG laser would normally be pumped all around 940 nm, Whilst Yb:KGW or Yb:KYW might be most competently pumped all-around 981 nm.
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In summary, we demonstrated that undoped scintillator crystals: BGO, GGG, YSO, LSO and LYSO are economical nonlinear products for broadband SC technology from the in close proximity to-infrared and short-wave infrared spectral ranges, when pumped by one hundred eighty fs fundamental harmonic pulses from an amplified Yb:KGW laser. YSO, LSO and LYSO produced two octave-spanning SC spectra, which Evaluate to SC spectra generated in YAG. These resources show really very similar performances to YAG also concerning threshold and ideal pump pulse energies for SC technology. Having said that, for what considerations the possibility to function at superior laser pulse repetition charge, YSO, LSO and LYSO present long lasting operation only at ten kHz and promptly degrade (inside a couple of minutes) at twenty kHz. In addition to the fairly very low SC generation threshold (169 nJ), GGG demonstrated exceptional effectiveness characteristics from the limited-wave infrared Together with the exceptional pump pulse Electrical power of 464 nJ, that is two situations decreased than in YAG: the most important purple-shifted spectral broadening and the highest spectral energy density, outperforming KGW and YAG crystals in that element.
The datasets utilized and/or analysed in the course of The existing review accessible with the corresponding writer on sensible ask for.
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KGW (potassium gadolinium tungstate) is really a crystal that is often made use of like a Raman crystal in Raman spectroscopy. This is a colorless, clear crystal that features a large Raman scattering performance and a strong Raman spectrum, rendering it well suited for a range of Raman purposes.
The spectral measurements of filament-induced luminescence counsel that scintillating Qualities of supplies may be commonly analyzed employing femtosecond around-infrared light resource via multiphoton excitation while in the filamentation regime, which enables uncomplicated separation of excitation and emission wavelengths and reduced chance of optical destruction.
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While BGO, GGG, YSO, LSO and LYSO often function laser hosts37, These are mainly identified as economical scintillators, whose scintillation Homes are examined pretty well38. On the other hand, the nonlinear optical properties of these crystals and so their prospective to serve as nonlinear components for SC generation in particular, and every other experiments about nonlinear propagation of rigorous femtosecond laser pulses, continue being very inadequately examined. So far, GGG, LT23,twenty five and YSO24 had been only sketchily analyzed for SC technology with Ti:sapphire laser pumping, nonetheless, to the most effective of our awareness, none of the investigated materials were examined with Yb-laser pumping, specifically for what issues their functionality at incredibly higher (tens to hundreds of kHz) pulse repetition rates.
-switched laser output beneath the two crystal placement configurations. The black line denotes the configuration Using the crystals placed in a similar orientation, even though the crimson line is underneath the configuration of crystals placed in orthogonal orientation.
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KGW crystals are utilised as Raman scattering components mainly because they have sturdy Raman scattering in a variety of different wavelengths. Each time a laser beam is directed on to the crystal, the photons during the laser beam connect with the crystal lattice, resulting in a number of the photons to scatter in a unique direction.