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We used a transmission grating (TG) for a dispersive component within our stretcher and compressor. A compact configuration was adopted, exactly where the stretcher as well as compressor shared a single grating just like that in Ref.

In summary, we shown that undoped scintillator crystals: BGO, GGG, YSO, LSO and LYSO are productive nonlinear products for broadband SC technology during the in the vicinity of-infrared and brief-wave infrared spectral ranges, when pumped by one hundred eighty fs elementary harmonic pulses from an amplified Yb:KGW laser. YSO, LSO and LYSO generated two octave-spanning SC spectra, which compare to SC spectra manufactured in YAG. These materials show fairly identical performances to YAG also in terms of threshold and best pump pulse energies for SC technology. Nonetheless, for what issues the chance to function at large laser pulse repetition fee, YSO, LSO and LYSO present strong operation only at 10 kHz and quickly degrade (in a few minutes) at twenty kHz. In addition to the rather very low SC generation threshold (169 nJ), GGG demonstrated outstanding functionality properties within the small-wave infrared with the best pump pulse energy of 464 nJ, which happens to be two occasions reduced than in YAG: the largest crimson-shifted spectral broadening and the highest spectral Vitality density, outperforming KGW and YAG crystals in that element.

Alternative on the Laptop for an improved one or perhaps a high-quality adjustment of the Personal computer orientation plus the applied substantial voltage is necessary to keep away from this phenomenon. A fast pulse picker can be utilized to Increase the nanosecond-scale contrast from the output most important pulse.

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The blended gain is complicated and may be measured less than distinct pumping conditions due to the quasi-3-level process actions with the Yb-doped acquire medium. The blueshift, with one peak from 1037 nm beneath the similar crystal placement orientation to 1035 nm underneath the orthogonal crystal placement orientation, could result through the reabsorption losses at a lengthy wavelength within the crystal the place the laser polarization is parallel to its Nm -axis, building the get at 1035 nm bigger than that at 1037 nm less than orthogonal orientation.

As a result, with an additional improvement inside our regenerative amplifier, two mJ compressed pulses is often envisioned, with out damaging any ingredient within our compressor.

The edge Electrical power for SC era (hbox E _ textrm th ) was described given that the pump pulse Power, the place the blue-shifted spectral broadening quickly settles to a specific Slash-off wavelength That is still Pretty much constant Despite having further more raise with the pump pulse Vitality. The ideal Electrical power (hbox E _textrm decide ), was described given that the pump pulse Electricity, which makes the biggest crimson-shifted spectral broadening before the onset of periodic modulation in the SC spectrum as a consequence of filament refocusing.

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A multi-go major amplifier will additional Raise the Electricity to over forty mJ. We are going to apply cryogenically cooled Yb:KGW technologies to restrain the thermal outcome. Two stages of compression will be utilized just after amplification. The first stage requires a standard Treacy-kind compressor, and could compress the heartbeat length to underneath three hundred fs with an efficiency of somewhere around check here 70%. The second stage includes a gasoline-loaded multi-go cell[

Figure four Beam radius variation on The 2 crystals while shifting the focal size of your thermal lensing result.

]. The dual-crystal configuration lowers the thermal load on Every single crystal when retaining a significant achieve, and facilitates the compensation of each one’s thermal lensing impact. Consequently, the laser cavity can work with a significant security assortment around the thermal lensing result variation.