Fascination About KGW Crystal
Fascination About KGW Crystal
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Preceding work confirmed that the twin-crystal configuration can be used to compensate for the thermal lensing result[
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In summary, we demonstrated that undoped scintillator crystals: BGO, GGG, YSO, LSO and LYSO are economical nonlinear resources for broadband SC era while in the close to-infrared and shorter-wave infrared spectral ranges, when pumped by 180 fs essential harmonic pulses from an amplified Yb:KGW laser. YSO, LSO and LYSO developed two octave-spanning SC spectra, which compare to SC spectra generated in YAG. These supplies show rather identical performances to YAG also concerning threshold and ideal pump pulse energies for SC technology. However, for what considerations the likelihood to function at superior laser pulse repetition level, YSO, LSO and LYSO demonstrate resilient Procedure only at 10 kHz and promptly degrade (in a few minutes) at 20 kHz. Apart from the somewhat lower SC technology threshold (169 nJ), GGG shown wonderful effectiveness features within the shorter-wave infrared Along with the optimal pump pulse energy of 464 nJ, which is two periods decreased than in YAG: the biggest crimson-shifted spectral broadening and the very best spectral Power density, outperforming KGW and YAG crystals in that part.
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Comparison of spectral Vitality densities of supercontinua generated during the disorders of exceptional pumping in the investigated elements.
We system to spice up the pulse Power to over forty mJ in two-phase multi-go amplifiers, similar to a get factor of 20. In Each and every amplifier, we may also adopt two cascaded crystals put below orthogonal orientation to reduce the thermal load on Every single crystal and compensate with the acquire-narrowing impact.
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]. The dual-crystal configuration lowers the thermal load on Just about every crystal when sustaining a significant achieve, and facilitates the payment of each one’s thermal lensing influence. Hence, the laser cavity can work with a sizable steadiness assortment more than the thermal lensing effect variation.