Fascination About KGW Crystal
Fascination About KGW Crystal
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The pink-shifted A part of the SC is of useful significance, especially for what considerations the general performance of broadly tunable optical parametric amplifiers pumped by the elemental harmonics of Yb lasers. The dearth of seed photons during the long-wavelength location of your SC spectrum restrictions the amplification performance and brings about pulse-to-pulse Power fluctuations across the degeneracy region of your optical parametric amplifier. This part is quantified in Fig. 6a by plotting the SC spectra in terms of spectral Electrical power density, which was approximated by measuring the energy with the axial part of SC radiation (which is the one virtually useful Section of SC emission). KGW crystal produces the very best spectral Electrical power density while in the 1200�?450 nm vary, as observed inside a current study30.
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Amplified pulses with the Electricity above 2.five mJ is often expected by applying a greater pump electricity into the regenerative amplifier and rendering it work on the saturation degree. The laser fluence of ~1 J/cm2 within the dichroic mirrors is believed for being below the problems threshold of significant-excellent dielectric-coated mirrors.
Another was positioned with its Np -axis parallel Together with the s-polarized way. A comparison was created in between a configuration While using the crystals positioned in a similar orientation (
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We program to boost the heartbeat Electrical power to earlier mentioned forty mJ in two-stage multi-move amplifiers, corresponding to a get issue of twenty. In Every single amplifier, we will even undertake two cascaded crystals positioned beneath orthogonal orientation to lessen the thermal load on Each individual crystal and compensate for that get-narrowing influence.
The edge Strength for SC generation (hbox E _ textrm th ) was defined as the pump pulse Strength, exactly where the blue-shifted spectral broadening speedily settles to a specific Lower-off wavelength That continues to be Nearly frequent In spite of further raise on the pump pulse energy. The optimum Power (hbox E _textrm opt ), was outlined since the pump pulse Strength, which produces the biggest purple-shifted spectral broadening before the onset of periodic modulation in the SC spectrum resulting from filament refocusing.
The Martinez stretcher stretched the seed pulses to ~250 ps with 1600 grooves/mm grating. The enter on the stretcher (incident angle: fifty read more two°) Which of your compressor incident in the grating were being from your identical side; hence, a slight angular tuning of your grating could be made to obtain the top compression final result. Within the compressor, the enter angle to the grating and the distance in between the interpretation stage (S1) as well as the transmission grating (TG) were built to compensate with the stretcher dispersion and all dispersion launched because of the materials.
KGW has a strong Raman spectrum that extends within the ultraviolet to your in the vicinity of infrared, rendering it valuable for A variety of purposes. The crystal can be utilized being a reference material for Raman spectroscopy, as well as a sample for researching Raman scattering within the solid point out.
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The origin with the factor's name arises from the English word 'potash,' this means pot ashes, plus the Arabic word qali