The smart Trick of KGW Crystal That Nobody is Discussing
The smart Trick of KGW Crystal That Nobody is Discussing
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Investigating tumor perfusion by hyperpolarized (thirteen) C MRI with comparison to conventional gadolinium contrast-Increased MRI and pathology in orthotopic human GBM xenografts.
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Determine 8 Intra-cavity pulse amplification process monitored by an oscilloscope. The heartbeat underwent an unsaturated amplification because of the mirror problems limitation.
In summary, we demonstrated that undoped scintillator crystals: BGO, GGG, YSO, LSO and LYSO are efficient nonlinear components for broadband SC technology while in the in the vicinity of-infrared and small-wave infrared spectral ranges, when pumped by one hundred eighty fs essential harmonic pulses from an amplified Yb:KGW laser. YSO, LSO and LYSO produced two octave-spanning SC spectra, which Assess to SC spectra developed in YAG. These components exhibit rather equivalent performances to YAG also in terms of threshold and optimal pump pulse energies for SC generation. Nonetheless, for what worries the likelihood to work at high laser pulse repetition price, YSO, LSO and LYSO present long lasting operation only at ten kHz and rapidly degrade (within a couple of minutes) at twenty kHz. Besides the somewhat very low SC era threshold (169 nJ), GGG demonstrated exceptional effectiveness qualities within the brief-wave infrared With all the optimal pump pulse Electrical power of 464 nJ, which happens to be two periods reduced than in YAG: the most important pink-shifted spectral broadening and the best spectral Power density, outperforming KGW and YAG crystals in that part.
], but it could add a lot more Price tag to this part. The intra-cavity spectral acquire curve may very well be modulated by inserting an etalon that reduces the actual attain in the wavelength with the utmost gain element[
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Down the road, We're going to undertake a laser seed having a broader spectral bandwidth and use an acousto-optical programmable dispersive filter to modulate the seed’s spectrum for making whole use of your gain bandwidth of our regenerative amplifier.
Comparison of spectral Electrical power densities of supercontinua manufactured within the conditions of ideal pumping in the investigated supplies.
The spectral measurements of filament-induced luminescence suggest that scintillating Attributes of products may be readily examined employing femtosecond close to-infrared light-weight supply by way of multiphoton excitation during the filamentation regime, which permits simple separation of excitation and click here emission wavelengths and small chance of optical damage.
Determine 4 Beam radius variation on the two crystals when changing the focal size of your thermal lensing effect.
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）
KGW has a powerful Raman spectrum that extends with the ultraviolet into the near infrared, making it beneficial for A selection of apps. The crystal can be employed to be a reference material for Raman spectroscopy, as well as a sample for studying Raman scattering within the sound condition.
Figure eight Intra-cavity pulse amplification system monitored by an oscilloscope. The heart beat underwent an unsaturated amplification due to the mirror harm limitation.
Both energies are marked through the dashed lines as well as their values are labeled during the plots. The equivalent functions ended up also noticed in KGW and YAG crystals, whose spectral broadening dynamics are revealed for a comparison in Fig. 4.