Not known Facts About KGW Crystal
Not known Facts About KGW Crystal
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Previous work showed that the dual-crystal configuration can be utilized to compensate for the thermal lensing result[
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Down the road, an investigation over the spectral get curve of Yb:KGW in the principle amplifier will be carried out underneath cryogenic temperature evolution from seventy seven K to 300 K. The Performing temperature will be controlled to comprehend broader attain bandwidth and fewer shift in the central wavelength of the key amplifier.
The red-shifted Portion of the SC is of sensible importance, especially for what concerns the effectiveness of broadly tunable optical parametric amplifiers pumped by the elemental harmonics of Yb lasers. The dearth of seed photons during the long-wavelength location on the SC spectrum restrictions the amplification effectiveness and results in pulse-to-pulse Power fluctuations within the degeneracy region in the optical parametric amplifier. This element is quantified in Fig. 6a by plotting the SC spectra with regard to spectral Electricity density, which was believed by measuring the Strength with the axial A part of SC radiation (and that is the only real nearly handy Element of SC emission). KGW crystal generates the very best spectral Electrical power density from the 1200�?450 nm assortment, as noted in the the latest study30.
Substitution on the PC for an improved one or perhaps a good adjustment with the Computer orientation and the applied significant voltage is required to avoid this phenomenon. A quick pulse picker can be employed to Enhance the nanosecond-scale distinction with the output major pulse.
Amplified pulses with the Strength above 2.five mJ is usually envisioned by applying a greater pump ability on the regenerative amplifier and rendering it perform within the saturation level. The laser fluence of ~1 J/cm2 around the dichroic mirrors is considered to generally be underneath the damage threshold of higher-quality dielectric-coated mirrors.
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Consequently, with an additional advancement inside our regenerative amplifier, two mJ compressed pulses might be envisioned, without harmful any part within our compressor.
Figure 4 Beam radius variation on The 2 crystals although shifting the focal size of your thermal lensing effect.
The Martinez stretcher stretched the seed pulses to ~250 ps with 1600 grooves/mm grating. The enter from the stretcher (incident angle: 52°) Which with the compressor incident with the grating ended up from the very same side; for this reason, a slight angular tuning of your grating could be designed to obtain the most beneficial compression end result. Inside the compressor, the input angle about the grating and the space among the translation phase (S1) read more as well as the transmission grating (TG) were being made to compensate to the stretcher dispersion and all dispersion introduced via the components.
KGW has a powerful Raman spectrum that extends with the ultraviolet into the in the vicinity of infrared, which makes it helpful for An array of apps. The crystal can be used as a reference content for Raman spectroscopy, in addition to a sample for studying Raman scattering in the solid point out.
Determine 4 Beam radius variation on The 2 crystals when altering the focal duration from the thermal lensing effect.
]. The dual-crystal configuration lowers the thermal load on Just about every crystal while keeping a high get, and facilitates the payment of each one’s thermal lensing impact. Thus, the laser cavity can get the job done with a sizable balance vary around the thermal lensing impact variation.