Photodarkening effect
WebJan 1, 2024 · Photodarkening (PD) effect in Cu-doped As-Se films with various structures has been investigated to see whether the copper can completely suppress the PD effect … WebAcademia.edu is a platform for academics to share research papers.
Photodarkening effect
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WebWe investigate the temporal evolution of photodarkening effect in ytterbium-doped large-mode-area photonic crystal fiber and discuss its mechanism. The results show the great influence of photodarkening on lasing properties. WebWe study the influence of laser exposure on transient absorption in a commercial Schott color glass filter doped by CdSxSe1−x microcrystals. With laser exposure the magnitude of the transient absorption at wavelengths above the band gap (negative, with the fast decay rate ≥1011 s−1), decreases, whereas that at wavelengths below the band gap (positive, …
WebWe examine the effect of photodarkening-induced pump light absorption on Yb-doped fiber thermal loading. In these experiments, the fiber is cladding pumped at 915nm, air cooled by natural convection, and monitored with a midinfrared thermal camera. The fiber temperature is found to correlate with progressive photodarkening. The maximum observed fiber … WebJun 1, 2012 · The latter, however, typically comes with increased photodarkening effects. Traditional Yb-doped fibers. At high pulse energy (>50 μJ), pulse deformation can severely limit the desired output pulse shape and create unwanted high peak powers that will lower the nonlinear effect threshold. It is well known that nonlinear effects can be reduced ...
WebDec 17, 2024 · The sensitivity of this effect to various experimental considerations is examined, including atmosphere, photon energy, photon dose, and also the role of perovskite composition and morphology; under certain conditions there can even be photodarkening effects. ... under certain conditions there can even be photodarkening effects. … WebWe found co-doping of group-2 element effectively suppresses photo-darkening effect in Yb-doped silica fiber. Laser oscillation in Mg/Yb co-doped silica fiber of 37-mm was also demonstrated at power of 140.4-mW and slope efficiency of 41.5%.
WebThe sol-gel derived samples with 80 wt % SiO 2 do not exhibit appreciable photodarkening while the melt-quenched glasses with 56 wt % SiO 2 exhibit strong photodarkening …
WebApr 9, 2024 · This study reports the radical elimination of the photodarkening (PD)-effect in Yb-doped fiber through deuterium loading. With deuterium pre-loading, no PD-induced … michael vey books read onlineWebDec 10, 2013 · At this laser lever, we did not observe the photodarkening in our silica fiber. But codoping moderate P 2 O 5 with Al 2 O 3 in Yb 3+-doped silica fiber is necessary to greatly suppress photodarkening effect when the fiber is operating continuously at high-power. Further work to reduce optical loss and improve mode quality of output laser is ... how to change your controls in robloxWebFeb 22, 2024 · However, in the late 1990s, photodarkening effect, i.e., the creation of color centers induced by light, was … Expand. 10. PDF. View 1 excerpt, references background; Save. Alert. Charge-transfer state excitation as the main mechanism of the photodarkening process in ytterbium-doped aluminosilicate fibres. how to change your country on fiverrWebThis study reports the radical elimination of the photodarkening (PD)-effect in Yb-doped fiber through deuterium loading. With deuterium pre-loading, no PD-induced excess loss of the Yb-doped fiber was observed under 915-nm pumping conditions. Moreover, the existing loss induced by the PD effect was also eliminated via deuterium loading, and the excess … michael vey prisoner of cell 25 word countWebDec 18, 2024 · Additionally, the nonlinear effects (NLEs) [2,7] and photodarkening (PD) effects [8][9] [10] should be considered in the amplifiers. To suppress NLEs, the doping … michael vey summaryWebPhotodarkening effect of an ytterbium fibre under different pump wavelength. 2.3 Time behavior of photodarkening Photodarkening is an effect that occurs strongly at the beginning and then decreases to reach a stable value. michaelvey.com gamesWebIn the second part of the thesis, the photodarkening effect of Tm³⁺-doped NaYF₄ nanocrystals is studied. We have found that photodarkening behavior is observed in Tm³⁺-doped nanocrystals that exhibit the photon avalanche effect. Power-dependent luminescence of a single 8% Tm3+-doped nanocrystal reveals that photodarkened … michael vey tara