The Greatest Guide To KGW Crystal
The Greatest Guide To KGW Crystal
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Therefore There is certainly tiny independence for optimizing the dispersion compensation effect. Sub-two hundred fs pulses is usually anticipated by using a broader bandwidth seed input. Due to the dual-crystal configuration, the laser cavity delivers a close to diffraction minimal laser beam with M
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The comparison with Eyeglasses is acceptable Because the large get bandwidth enables e.g. tungstate femtosecond lasers and tunable lasers to compete with glass lasers.
A number of techniques have already been adopted to resolve this problem. An acousto-optical programmable dispersive filter is usually utilized to modulate the seed’s spectrum to suppress the achieve-narrowing outcome[
KGW (potassium gadolinium tungstate) is actually a crystal that is commonly used like a Raman crystal in Raman spectroscopy. It's a colorless, transparent crystal that features a substantial Raman scattering efficiency and a solid Raman spectrum, which makes it ideal for A selection of Raman programs.
The actual spectra were reconstructed by correcting the calculated spectra with the account for your filter transmission features and for that sensitivity functions from the spectrometers at the info submit-processing phase. The spectral dynamics in Each individual sample was measured by fine tuning the pump pulse Strength with a computer-controlled attenuator which was built-in within the laser process. Thermal Electricity meter EM (Ophir 3A-PF-12) was utilized to evaluate the SC energy which was thereafter accustomed to calculate the spectral Strength density of your SC radiation. Every one of the measurements were carried out with no translation with the sample with regard to the pump beam.
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The Martinez stretcher stretched the seed pulses to ~250 ps with 1600 grooves/mm grating. The input of the stretcher (incident angle: 52°) Which with the compressor incident within the grating ended up within the same facet; that's why, a slight angular tuning of your grating could be built to acquire the ideal compression end result. Inside the compressor, the enter angle on the grating and the gap among the translation phase (S1) along with the transmission grating (TG) had been designed to compensate for that stretcher dispersion and all dispersion introduced with the supplies.
KGW has a robust Raman spectrum that extends in the ultraviolet for the around infrared, which makes it handy for A selection of apps. The crystal may be used like a reference content for Raman spectroscopy, as well as a sample for studying Raman scattering while in the reliable condition.
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Both of those energies are marked from the dashed traces as well as their values are labeled during the plots. The identical functions ended up here also noticed in KGW and YAG crystals, whose spectral broadening dynamics are shown for the comparison in Fig. four.