Facts About KGW Crystal Revealed
Facts About KGW Crystal Revealed
Blog Article
Investigating tumor perfusion by hyperpolarized (thirteen) C MRI with comparison to conventional gadolinium distinction-Improved MRI and pathology in orthotopic human GBM xenografts.
We use cookies to tell apart you from other users and to provide you with an even better experience on our Sites. Near this concept to just accept cookies or Learn how to control your cookie options.
The attain bandwidth e.g. of Yb:KGW and Yb:KYW may be very significant when compared with that of Yb:YAG. This allows for large wavelength tunability and for A great deal shorter pulse durations from manner-locked lasers. Values perfectly down below a hundred fs are attained with passive method locking.
In conclusion, we demonstrated that undoped scintillator crystals: BGO, GGG, YSO, LSO and LYSO are successful nonlinear materials for broadband SC generation within the in the vicinity of-infrared and limited-wave infrared spectral ranges, when pumped by a hundred and eighty fs fundamental harmonic pulses from an amplified Yb:KGW laser. YSO, LSO and LYSO developed two octave-spanning SC spectra, which Evaluate to SC spectra generated in YAG. These products show pretty similar performances to YAG also when it comes to threshold and optimum pump pulse energies for SC era. Nonetheless, for what concerns the possibility to work at superior laser pulse repetition rate, YSO, LSO and LYSO clearly show resilient operation only at ten kHz and rapidly degrade (within just a couple of minutes) at twenty kHz. Aside from the reasonably lower SC generation threshold (169 nJ), GGG demonstrated exceptional effectiveness features from the shorter-wave infrared While using the exceptional pump pulse Electricity of 464 nJ, and that is two here periods reduced than in YAG: the most important red-shifted spectral broadening and the highest spectral Power density, outperforming KGW and YAG crystals in that element.
Its pump laser requires a brief pulse period, a reduced time jitter, and sleek temporal and spatial distributions because of the intrinsic instantaneous course of action. Hence, the OPCPA process is a lot more complicated and costly.
The comparison with glasses is suitable Considering that the massive gain bandwidth permits e.g. tungstate femtosecond lasers and tunable lasers to contend with glass lasers.
One other was put with its Np -axis parallel Together with the s-polarized way. A comparison was manufactured between a configuration Using the crystals put in exactly the same orientation (
KGW (potassium gadolinium tungstate) is really a crystal that is usually applied to be a Raman crystal in Raman spectroscopy. It is just a colorless, transparent crystal that has a substantial Raman scattering performance and a strong Raman spectrum, rendering it ideal for An array of Raman purposes.
]. This technique was based on The truth that the spectral emission cross-part curves vary from one another when laser polarization is paralleled to the different optical axis of Yb-doped double tungstates[
In the meantime, to be certain continued assist, we've been displaying the website without the need of styles and JavaScript.
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）
-switched laser output underneath the two crystal placement configurations. The black line denotes the configuration with the crystals placed in exactly the same orientation, whilst the red line is under the configuration of crystals put in orthogonal orientation.
Do you have got any conflicting interests? * Conflicting passions assist Close Conflicting interests aid Remember to checklist any costs and grants from, employment by, consultancy for, shared ownership in or any near connection with, at any time above the preceding 36 months, any organisation whose interests might be impacted from the publication from the reaction.
KGW crystals are made use of as Raman scattering materials simply because they have powerful Raman scattering in a number of various wavelengths. Every time a laser beam is directed onto the crystal, the photons within the laser beam communicate with the crystal lattice, leading to some of the photons to scatter in a different way.