Facts About KGW Crystal Revealed
Facts About KGW Crystal Revealed
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Previous perform confirmed that the dual-crystal configuration can be employed to compensate for that thermal lensing effect[
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In conclusion, we shown that undoped scintillator crystals: BGO, GGG, YSO, LSO and LYSO are efficient nonlinear resources for broadband SC technology during the close to-infrared and limited-wave infrared spectral ranges, when pumped by one hundred eighty fs essential harmonic pulses from an amplified Yb:KGW laser. YSO, LSO and LYSO created two octave-spanning SC spectra, which Review to SC spectra created in YAG. These supplies exhibit quite equivalent performances to YAG also concerning threshold and exceptional pump pulse energies for SC era. Nevertheless, for what fears the chance to operate at significant laser pulse repetition amount, YSO, LSO and LYSO clearly show durable operation only at ten kHz and promptly degrade (inside of a few minutes) at twenty kHz. In addition to the comparatively small SC generation threshold (169 nJ), GGG shown exceptional general performance attributes in the limited-wave infrared With all the optimal pump pulse Strength of 464 nJ, which can be two moments reduced than in YAG: the biggest red-shifted spectral broadening and the very best spectral Electricity density, outperforming KGW and YAG crystals in that part.
Its pump laser needs a short pulse length, a low time jitter, and smooth temporal and spatial distributions due to the intrinsic instantaneous system. Thus, the OPCPA program is much more complicated and pricey.
The measured cut-off wavelengths for the limited-wavelength side are in line with the final pattern of blue-shifted spectral broadening around the bandgap of nonlinear materials. All of the nonlinear products generated sensible pink-shifted spectral broadenings beneath situations of exceptional pump pulse energies, with the biggest purple-shift exceeding 2000 nm calculated in GGG crystal. Our final results revealed that GGG and BGO (which also had the lowest supercontinuum technology threshold) give sturdy, optical destruction-free of charge effectiveness in a laser repetition price of 200 kHz, suggesting that these products are great alternate options to YAG and KGW for very low threshold, higher regular power supercontinuum generation inside the in close proximity to- and shorter-wave infrared spectral ranges. We also demonstrated that scintillating Qualities of bulk resources may be conveniently analyzed while in the filamentation regime, by means of multiphoton excitation applying near-infrared femtosecond laser pulses.
The opposite was placed with its Np -axis parallel While using the s-polarized route. A comparison was manufactured concerning a configuration Together with the crystals placed in the exact same orientation (
Situation Research of picked vital systems invented or co-invented by American Features in only the 1st two decades of the century
The spectral measurements of filament-induced luminescence suggest that scintillating Attributes of elements may very well be commonly researched making use of femtosecond close to-infrared light resource through multiphoton excitation within the filamentation routine, which makes it possible for effortless separation of excitation and emission wavelengths and reduced hazard of optical injury.
Determine 4 Beam radius variation on the two crystals when switching the focal size of the thermal lensing impact.
相关工作得到了上海扬帆计划、国家重点研发计划、中国科学院战略性先导科技专项、国家自然科学基金项目、上海市优秀学术/技术带头人计划、上海市市级科技重大专项、中国科学院青年创新促进会的支持。（强场激光物理国家重点实验室供稿）
A multi-pass major amplifier will even more Enhance the Electrical power to earlier mentioned 40 mJ. We are going to use cryogenically cooled Yb:KGW technological innovation to restrain the thermal effect. Two phases of compression are going to be applied after amplification. The very first stage includes a typical Treacy-variety compressor, and could compress the heartbeat duration to under 300 fs with the efficiency of somewhere around 70%. The second phase consists of a fuel-stuffed multi-pass mobile[
Determine 4 Beam radius variation on The 2 crystals even though altering the focal duration from the thermal lensing outcome.
Both of those energies are marked by the dashed read more lines and their values are labeled while in the plots. The similar options were also observed in KGW and YAG crystals, whose spectral broadening dynamics are shown for any comparison in Fig. 4.