Effect of Tm3+ concentration on the emission wavelength shift in Tm3+-doped silica microsphere lasers
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چکیده
منابع مشابه
Energy transfer up-conversion in Tm3+-doped silica fiber
A study of the mechanisms responsible for the infra-red to near infra-red up-conversion in thulium doped silica fibres is presented. Up-conversion luminescence was observed from the H4 level of Tm under 1586 nm pumping into the F4 level. The quadratic dependence of the up-conversion luminescence at 800 nm on the 1800 nm luminescence from the F4 level confirms that the H4 level is populated by a...
متن کاملDefect production in silica fibers doped with Tm3+.
Defects in undoped germanosilicate fibers have a profound effect on optical properties in the visible region of the spectrum. Photoexcitation of these defects can produce a refractive-index change, which in turn can be used for many useful purposes, including the formation of gratings and second-harmonic generation in fibers. The defects responsible for this behavior have been associated with t...
متن کاملThe effect of La2O3 in Tm3+-doped germanate-tellurite glasses for ~2 μm emission
A germanate-tellurite glass (GeO2-TeO₂-K₂O-Nb₂O₅-La₂O₃) with thulium doping has been investigated for application as a laser material around 2.0 μm regions. Under the 808 nm laser diode pumped, intense 1.8 μm emission is obtained. Based on the absorption spectra, radiative properties are predicted using Judd-Ofelt theory. The maximum value of emission cross-section of Tm(3+) around 1.8 μm can r...
متن کاملEffect of Tm3+-induced defects on the photoexcitation energy relaxation in Tm-doped AlxGa1−xN
Same as Report (SAR) 18. NUMBER
متن کاملCritical separation for efficient Tm3+ -Tm3+ energy transfer evidenced in nanostructured Tm3+: Al2O3 thin films.
Nanostructured amorphous Al oxide (a-Al2O3) thin films doped with Tm3+ were synthesized by alternate pulsed laser deposition. The Tm3+ ions have been deposited in layers with in-depth separation ranging from 0.75 to 6 nm. The films show two broad emission bands originated from the Tm3+ 3H4-->3F4 and 3F4-->3H6 transitions. Their intensity increases at a similar rate and the lifetimes are not mod...
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ژورنال
عنوان ژورنال: Optics Letters
سال: 2018
ISSN: 0146-9592,1539-4794
DOI: 10.1364/ol.43.004325