The KGW Crystal Diaries
The KGW Crystal Diaries
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]. A result of the quick storage time, Ti:sapphire is typically pumped by frequency-doubled Nd:YAG or Nd:glass good-state lasers, which results in a bulky and sophisticated procedure with higher Price. When compared with conventional CPA laser techniques, the OPCPA process can acquire a shorter pulse duration and the next peak power.
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For some applications, tungstates give a combination of different valuable Qualities. In particular for passive manner locking, ytterbium-doped double tungstates are often exceptional to other media when it comes to The mix of higher obtain bandwidth, massive cross-sections, and relatively great thermal Qualities �?even though in Each individual individual willpower far better materials may be located.
In conclusion, we demonstrated that undoped scintillator crystals: BGO, GGG, YSO, LSO and LYSO are effective nonlinear resources for broadband SC generation during the in close proximity to-infrared and quick-wave infrared spectral ranges, when pumped by one hundred eighty fs essential harmonic pulses from an amplified Yb:KGW laser. YSO, LSO and LYSO created two octave-spanning SC spectra, which Review to SC spectra made in YAG. These resources show quite very similar performances to YAG also concerning threshold and optimum pump pulse energies for SC era. Even so, for what problems the possibility to operate at substantial laser pulse repetition price, YSO, LSO and LYSO show tough Procedure only at 10 kHz and promptly degrade (within just a few minutes) at twenty kHz. Aside from the fairly very low SC technology threshold (169 nJ), GGG shown superb efficiency qualities within the limited-wave infrared Together with the exceptional pump pulse Strength of 464 nJ, which happens to be two instances decreased than in YAG: the most important pink-shifted spectral broadening and the best spectral Vitality density, outperforming KGW and YAG crystals in that aspect.
Its pump laser desires a brief pulse length, a small time jitter, and smooth temporal and spatial distributions as a result of intrinsic instantaneous approach. As a result, the OPCPA technique is much more intricate and high-priced.
Potassium was uncovered and very first isolated by Sir Humphrey Davy in 1807. Potassium will be the seventh most abundant aspect in the world. It truly is Just about the most reactive and electropositive of all metals and fast oxidizes. Just like other alkali metals, potassium decomposes in h2o Together with the evolution of hydrogen thanks to its reacts violently with drinking water, it only takes place in mother nature in ionic salts.
Numerous methods are actually adopted to solve this problem. An acousto-optical programmable dispersive filter could be utilized to modulate the seed’s spectrum to suppress the acquire-narrowing impact[
KGW (potassium gadolinium tungstate) is a crystal that is commonly utilised to be a Raman crystal in Raman spectroscopy. It's really a colorless, transparent crystal that has a large Raman scattering performance and a strong Raman spectrum, which makes it suitable for A selection of Raman programs.
Thermal outcomes are appreciably scaled-down in KGW. This combined with the significant problems threshold make the crystal a wonderful prospect for ability scaling. Evaluating Ba(NO3)two and KGW for Raman software Ba(NO3)two are more effective in case of ns pulses and KGW �?in the event of ps pulses.
The edge Strength for SC generation (hbox E _ textrm th ) was outlined because the pump pulse Vitality, exactly where the blue-shifted spectral broadening promptly settles to a particular Lower-off wavelength that remains Pretty much frequent Despite further more enhance from the pump pulse Power. The ideal energy (hbox E _textrm opt ), was outlined as the pump pulse Strength, which provides the most important red-shifted spectral broadening before the onset of periodic modulation while in the SC spectrum due to filament refocusing.
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]. The dual-crystal configuration lowers the thermal load on Just about every crystal whilst keeping a high obtain, and facilitates the payment of every one’s thermal lensing effect. As a result, the laser cavity can get the job done with a large stability range about the thermal lensing effect variation.