The best Side of KGW Crystal
The best Side of KGW Crystal
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The red-shifted Section of the SC is of functional significance, especially for what problems the overall performance of broadly tunable optical parametric amplifiers pumped by the elemental harmonics of Yb lasers. The lack of seed photons while in the extended-wavelength area with the SC spectrum limitations the amplification effectiveness and results in pulse-to-pulse Power fluctuations around the degeneracy area in the optical parametric amplifier. This facet is quantified in Fig. 6a by plotting the SC spectra with regard to spectral Electricity density, which was believed by measuring the energy of the axial Section of SC radiation (which can be the only basically practical Element of SC emission). KGW crystal provides the highest spectral Electrical power density while in the 1200�?450 nm array, as noted within a latest study30.
], but it would insert considerably more Value to this ingredient. The intra-cavity spectral attain curve can be modulated by inserting an etalon that lowers the actual achieve at the wavelength with the utmost gain factor[
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Another was placed with its Np -axis parallel Using the s-polarized route. A comparison was designed between a configuration With all the crystals put in precisely the same orientation (
Comparison of spectral Electrical power densities of supercontinua produced during the circumstances of best pumping within the investigated elements.
]. This technique was depending on The truth that the spectral emission cross-section curves vary from one another when laser polarization is paralleled to different optical axis of Yb-doped double tungstates[
The edge Vitality for SC generation (hbox E _ textrm th ) was described since the pump pulse energy, check here where by the blue-shifted spectral broadening swiftly settles to a certain Lower-off wavelength That is still almost continuous Despite more increase of your pump pulse Electrical power. The optimum Electrical power (hbox E _textrm decide ), was outlined as being the pump pulse Vitality, which generates the biggest pink-shifted spectral broadening ahead of the onset of periodic modulation during the SC spectrum because of filament refocusing.
The Martinez stretcher stretched the seed pulses to ~250 ps with 1600 grooves/mm grating. The enter of your stretcher (incident angle: 52°) and that of the compressor incident within the grating have been from your very same facet; as a result, a slight angular tuning of your grating could be manufactured to acquire the top compression consequence. Inside the compressor, the input angle to the grating and the space amongst the interpretation stage (S1) as well as the transmission grating (TG) ended up built to compensate for your stretcher dispersion and all dispersion launched through the components.
The Yb:KGW laser process features a quasi-3-degree actions. The web acquire of the Yb:KGW crystal wasn't higher: quite a few tens of roundtrips have been required to amplify the nanojoule seed into a millijoule amount. Thus, the get-narrowing outcome was inevitable in Yb:KGW regenerative amplifiers.
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