A Review Of KGW Crystal
A Review Of KGW Crystal
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Publish your exploration on American Component Web-site Unravelling the dissociation pathways of acetic acid upon electron transfer in potassium collisions: experimental and theoretical experiments.
Although ytterbium-doped laser obtain media typically show a small quantum defect, ytterbium-doped tungstates permit for particularly small values. By way of example, a 1030-nm Yb:YAG laser would Commonly be pumped all over 940 nm, Whilst Yb:KGW or Yb:KYW can be most successfully pumped about 981 nm.
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In conclusion, we shown that undoped scintillator crystals: BGO, GGG, YSO, LSO and LYSO are economical nonlinear components for broadband SC era from the around-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 compare to SC spectra manufactured in YAG. These supplies exhibit fairly equivalent performances to YAG also concerning threshold and ideal pump pulse energies for SC generation. However, for what worries the chance to operate at higher laser pulse repetition level, YSO, LSO and LYSO show resilient Procedure only at 10 kHz and speedily degrade (in just a few minutes) at 20 kHz. In addition to the fairly lower SC generation threshold (169 nJ), GGG shown exceptional performance attributes from the quick-wave infrared With all the exceptional pump pulse Strength of 464 nJ, that is two situations reduce than in YAG: the largest crimson-shifted spectral broadening and the best spectral energy density, outperforming KGW and YAG crystals in that element.
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The comparison with glasses is appropriate since the significant attain bandwidth allows e.g. tungstate femtosecond lasers and tunable lasers to compete with glass lasers.
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Although BGO and LT generated the narrowest SC spectra (a bit a lot less than one.5 optical octaves), they could be viewed as incredibly appealing nonlinear supplies for broadband SC generation with pumping at longer laser wavelengths. Owing to its big nonlinearity, BGO exhibited the bottom SC technology threshold (78 nJ) Amongst the investigated resources, which can be twenty five % lower than in KGW and will be regarded as outstanding nonlinear product for quite very low-threshold SC technology. The observed secure and sturdy problems-cost-free effectiveness of BGO and GGG at 200 kHz pulse repetition price suggests that these nonlinear resources have a possible for SC era at even bigger, MHz, repetition premiums. In addition, these materials give SC radiation with a great list of parameters which might be essential for apps in high pace spectroscopy and more info imaging that utilize bulk-generated SC, see e.g.seventeen,eighteen,19,20.
The pink-shifted Component of the SC spectrum in BGO has the bottom spectral Electrical power density, that's 1–2 orders of magnitude reduce than in the rest of the elements. Nevertheless, really minimal Electricity threshold of SC era, together with lower best pump energy in BGO, should be identified. The estimated spectral Electrical power densities made in LSO and LYSO are fairly similar to YAG throughout the big Section of the SC spectrum. Probably the most interesting getting in that regard is GGG crystal, which, Inspite of extremely moderate blue-shifted spectral broadening, creates the largest spectral purple-shift and the highest spectral Electrical power density within the 1600�?000 nm assortment, which is sort of an purchase of magnitude higher than that created in YAG.
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 beneath the two crystal placement configurations. The black line denotes the configuration Together with the crystals placed in the identical orientation, though the purple line is under the configuration of crystals put in orthogonal orientation.
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KGW crystals are utilised as Raman scattering materials given that they have potent Raman scattering in a variety of various wavelengths. Every time a laser beam is directed on to the crystal, the photons from the laser beam connect with the crystal lattice, creating many of the photons to scatter in a special route.