An Unbiased View of KGW Crystal
An Unbiased View of KGW Crystal
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Although ytterbium-doped laser gain media usually show a small quantum defect, ytterbium-doped tungstates allow for specially compact values. For example, a 1030-nm Yb:YAG laser would Ordinarily be pumped close to 940 nm, Whilst Yb:KGW or Yb:KYW might be most proficiently pumped all over 981 nm.
We applied a transmission grating (TG) as being a dispersive element inside our stretcher and compressor. A compact configuration was adopted, the place the stretcher plus the compressor shared a single grating similar to that in Ref.
The crimson-shifted A part of the SC is of useful value, especially for what fears the effectiveness of broadly tunable optical parametric amplifiers pumped by the fundamental harmonics of Yb lasers. The lack of seed photons inside the extensive-wavelength region on the SC spectrum boundaries the amplification performance and ends in pulse-to-pulse Vitality fluctuations within the degeneracy area with the optical parametric amplifier. This facet is quantified in Fig. 6a by plotting the SC spectra concerning spectral energy density, which was believed by measuring the energy of your axial Section of SC radiation (which can be the only pretty much handy Component of SC emission). KGW crystal generates the highest spectral Electrical power density within the 1200�?450 nm range, as famous in a recent study30.
], but it will include a great deal more Value to this element. The intra-cavity spectral get curve could be modulated by inserting an etalon that minimizes the actual acquire for the wavelength with the utmost obtain element[
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Quite a few methods are actually adopted to resolve this issue. An acousto-optical programmable dispersive filter is usually utilized to modulate the seed’s spectrum to suppress the get-narrowing outcome[
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The actual spectra ended up reconstructed by correcting the measured spectra with an account for the filter transmission features and with the sensitivity functions with the spectrometers at the info write-up-processing stage. The spectral dynamics in Every single sample was measured by fantastic tuning the pump pulse Electricity with a pc-controlled attenuator which was built-in while in the laser program. Thermal Electrical power meter EM (Ophir 3A-PF-twelve) was accustomed to measure the SC Electricity which was thereafter utilized to determine the spectral energy density in the SC radiation. Every one of the measurements were done with none translation with the sample with regard to your pump beam.
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Tungstates have a tendency to get higher Raman coefficients (�?Raman scattering). Thus, they're able to crank out major Raman gain at reasonable optical intensities. It is achievable to use the laser crystal alone for a Raman converter.
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