Photodarkening effect

Author: fcnv

August undefined, 2024

WebDec 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 … WebIn 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 …

Room temperature spectral hole burning and elimination of ...

WebOct 1, 2003 · The main goal of this study is to investigate whether the photodarkening effect in glassy As 2 S 3 and As 2 O 3 is associated with changes in the asymmetry of the … WebWe presented an experimental comparison of the core-composition difference on the suppression of the photodarkening and transverse mode instability effects. Two core-composition fibers, entailing Yb/Al/Ce and Yb/Al/P co-doped fibers, were fabricated by MCVD process combined with solution doping technique. The parameters of two fibers were … greek dessert custard filo dough

Fibers Free Full-Text Characteristics and Laser Performance of …

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. … WebThe effects of GeO2 content on the valence variations of Yb3+/Yb2+ ions, spectral properties of Yb3+ ions, and radiation resistance of Yb/Al/Ge co-doped silica glasses were systematically studied. ... commonly referred to as the photodarkening (PD) and radiation darkening (RD) effects [9,10], when operating in amplifying conditions and harsh ... WebThe radical elimination of photodarkening effect by H2-loading was demonstrated, and the output power was stable during long term operation in high power fiber amplifiers, without … floway access rhe

Elimination of the Photodarkening Effect in an Yb-Doped Fiber

Eliminating photodarkening effect by H2-loading in high …

WebOct 21, 1983 · We studied the photodarkening effect in films of Ge 10 As 40 Se 25 S 25, Ge 25 Se 75 and Ge 22.5 As 10 Se 67.5. The transmissivities of the films were measured as a function of the exposure time and the contrast indices γ were obtained. These results were compared with values calculated from the rate equations, and the photodarkening … 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 … floway classic rhe 6000WebWe 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, … floway classic rhe 4000

"WebThis 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 … " - Photodarkening effect

Photodarkening effect

Photodarkening: measure, characterization, and figure of merit

WebDec 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 ... WebPhotodarkening. Photodarkening is optical effect observed in interaction of laser radiation with amorphous media (glasses) in optical fibers. Until now, such creation of color …

Did you know?

WebSisyphus effect; Skin whitening; Skyguard (airport defense system) Slapper detonator; Slope efficiency; Smith–Purcell effect; Smoke detector; Smoke screen; Sniper; Soft-tissue laser surgery; Soft laser desorption; Solar-pumped laser; Solar sail; Solid-state laser; Solid-state dye laser; Soviet laser pistol; Space-based solar power; Space debris 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 …

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 ... WebJan 13, 2024 · Light-induced effects in a-GexSe100-x chalcogenide glasses, i.e., photobleaching (PB), photodarkening (PD), and photoinduced structural transformations, have been investigated as a function of ...

WebFirst, the radiation-induced photodarkening in erbium/ytterbium co-doped optical fibre (EYDF) and the thermal effect in these irradiated EYDFs have been studied, which evidently display a reversible thermal effect. ... When the EYDF is exposed to Co 60 γ-radiation, a significant photodarkening effect can be observed due to the RIA . By ... WebMar 1, 2024 · Simultaneous photodarkening and photobleaching effects induced by 976 and 405 nm radiations, respectively, were investigated in a 1070 nm laser and compared with …

WebThis 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 …

WebMar 30, 2007 · The beam was weakened enough to avoid the photodarkening effect, which appears as a decrease of the transmitted light intensity for a strong continuous … floway fire pumpsWebNov 26, 2024 · The results showed that some of the formed ODC can be healed by irradiation and the Al/Na/Pb/P glass network act as a good environment for Yb2O3 distribution that can decrease photodarkening effect. Phosphate glass with composition of (P2O5)47–(Na2O)23–(Al2O3)6–PbO(24−x)–(Yb2O3)x where x = 0.1, 1 and 3 of Yb2O3 floway classic phe 6000WebThis paper examines the effects of gamma radiation on erbium-, ytterbium-, and Yb/Er co-doped optical fibers by exposing a suite of such fibers to radiation from a Co-60 source over long periods of time while monitoring the temporal and spectral decrease in transmittance of a reference signal. greekdiamonds infoWebThe photodarkening effect normally appears to be permanent, although it has been demonstrated that it can be reversed by heating the fiber [18] or by irradiation with ultraviolet light [19]. Further studies will hopefully reveal … greekdiamond.infoWebPhotodarkening 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. greek dialect crosswordWebThe 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 … greek desserts recipes easyWebNov 5, 2024 · In this paper, we summarize the research on photodarkening in optical fibers. The causes of photodarkening in fiber, the influence of photodarkening on fiber laser, the … greek desserts with filo dogh