The best Side of KGW Crystal
The best Side of KGW Crystal
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Investigating tumor perfusion by hyperpolarized (thirteen) C MRI with comparison to traditional gadolinium contrast-Increased MRI and pathology in orthotopic human GBM xenografts.
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In conclusion, we demonstrated that undoped scintillator crystals: BGO, GGG, YSO, LSO and LYSO are effective nonlinear materials for broadband SC technology while in the close to-infrared and quick-wave infrared spectral ranges, when pumped by a hundred and eighty fs elementary harmonic pulses from an amplified Yb:KGW laser. YSO, LSO and LYSO made two octave-spanning SC spectra, which Assess to SC spectra produced in YAG. These elements exhibit rather related performances to YAG also when it comes to threshold and optimum pump pulse energies for SC generation. Nonetheless, for what fears the possibility to operate at large laser pulse repetition amount, YSO, LSO and LYSO demonstrate tough Procedure only at 10 kHz and speedily degrade (within just a few minutes) at twenty kHz. Moreover the somewhat low SC generation threshold (169 nJ), GGG shown fantastic general performance traits while in the limited-wave infrared Using the ideal pump pulse Electrical power of 464 nJ, which can be two times decrease than in YAG: the largest red-shifted spectral broadening and the best spectral Electrical power density, outperforming KGW and YAG crystals in that aspect.
The datasets utilized and/or analysed during The present examine accessible through the corresponding writer on acceptable request.
Prior to the event of Nd:YAG, Nd3+:CaWO4 was a vital exceptional-earth-doped laser attain medium. It absolutely was actually Utilized in the first continually operating crystal laser.
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In its elemental variety, gadolinium provides a silvery-white look. Gadolinium can be a exceptional earth or lanthanide element that possesses special Houses useful to specialised apps for example semiconductor fabrication and nuclear reactor shielding. It really is used for both its large magnetic minute (seven.ninety fourμ B) As well as in phosphors and scintillator crystals. When complexed with EDTA ligands, it can be utilised as an injectable contrast agent for MRIs. The ingredient is named once the Finnish chemist and geologist Johan Gadolin.
Thus, with a further improvement inside our regenerative amplifier, two mJ compressed pulses may be anticipated, devoid of harmful any ingredient inside our compressor.
Determine 4 Beam radius variation on The 2 crystals although modifying the focal size of the thermal lensing result.
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 key amplifier will additional boost the Power to previously mentioned 40 mJ. We'll utilize cryogenically cooled Yb:KGW technology to restrain the thermal effect. Two stages of compression are going to be utilised following amplification. The first stage consists of a common Treacy-style compressor, and will compress the pulse length to under 300 fs with an click here performance of close to 70%. The next phase will involve a fuel-crammed multi-pass mobile[
Determine 8 Intra-cavity pulse amplification process monitored by an oscilloscope. The pulse underwent an unsaturated amplification due to the mirror hurt limitation.
Equally energies are marked because of the dashed traces and their values are labeled within the plots. The identical characteristics have been also observed in KGW and YAG crystals, whose spectral broadening dynamics are shown for your comparison in Fig. four.