A global design of an erbium-doped fiber and an erbium-doped fiber amplifier

Cheng, Cheng

doi:10.1016/j.optlastec.2004.01.006

Cited by 15 publications

(8 citation statements)

References 12 publications

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“…Comparison of predicted radiative lifetimes (τ R ) for various excited levels of Er 3+ :RTFP glasses with different hosts.In all three glasses the radiative lifetimes of the excited states decreases in the order4 I 13/2 > 4 I 9/2 > 4 I 11/2 > 4 F 9/2 > 4 S 3/2 > 4 F 5/2 > 2 H 9/2 > 4 F 7/2 > 2 H 11/2 > 4 G 11/2with an exception of the 4 I 9/2 level in the KTFP glass sample. This may be due to the decrease of 4 in KTFP glass, when compared with LiTFP and NaTFP glasses.…”

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confidence: 90%

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Er³⁺-doped tellurofluorophosphate glasses for lasers and optical amplifiers

Jayasimhadri

Moorthy

Kojima

et al. 2005

J. Phys.: Condens. Matter

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Absorption, fluorescence and decay properties of erbium-doped alkali tellurofluorophosphate glasses (RTFP) with the molar compositions of 50 (NaPO3)6–10 TeO2–20 AlF3–19 RF–1 Er2O3 (R = Li,Na or K) have been investigated in order to utilize these materials for the development of fibre amplifiers and lasers. The Judd–Ofelt (JO) model was applied to the absorption intensities of Er3+ (4f11) transitions to determine the JO intensity parameters Ωλ (λ = 2,4 or 6). These evaluated intensity parameters are used to calculate the spontaneous emission probabilities and branching ratios from the excited state J manifolds to the lower lying J′ manifolds of Er3+ emission transitions. The radiative lifetimes of these excited states are determined from their respective spontaneous emission probabilities. Visible and NIR emission spectra have been studied for all three Er3+-doped tellurofluorophosphate glasses. In particular, for the emission at 1.5 µm corresponding to the transition, radiative parameters like the full width at half maximum (FWHM), emission cross-sections (σe) and figure of merit (FWHM × σe) were determined and compared with other hosts. The measured lifetimes of the 4S3/2 level are compared with predicted radiative lifetimes calculated from the JO theory. The potentiality of Er3+-doped tellurofluorophosphate glasses for devices such as lasers and optical amplifiers is discussed.

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confidence: 90%

“…In recent years, the incorporation of rare-earth ions into solids has attracted more attention due to potential applications such as planar waveguide amplifiers, short wavelength laser sources, optical amplifiers for telecommunications and solid-state frequency upconverters [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Er³⁺-doped tellurofluorophosphate glasses for lasers and optical amplifiers

Jayasimhadri

Moorthy

Kojima

et al. 2005

J. Phys.: Condens. Matter

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“…Rare earth ions doped fluorophosphate glasses have been the subject of several spectroscopic investigations, due to their potential applications as planar waveguide amplifiers, short wavelength laser sources, optical amplifiers for telecommunications and solid-state frequency upconverters [1][2][3][4][5]. Especially, Er 3+ -doped glasses are attractive for numerous applications as microchip lasers [6,7], erbium doped fiber amplifiers (EDFAs) in wavelength division multiplexing (WDM) systems [8,9] and in medical applications [10,11].…”

Section: Introductionmentioning

confidence: 99%

Optical properties of Er3+-doped alkali fluorophosphate glasses

Moorthy

Jayasimhadri

Saleem

et al. 2007

Journal of Non-Crystalline Solids

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“…The design and optimization process can be quite complex and is dealing with purely physical properties and parameters of the amplifying systems, such as fiber's composition (Erbium concentration), fiber's refractive index contrast, core radius, fiber length, pumping power and wavelength, etc. Genetic algorithms have been applied for the optimization of both the active erbium doped fiber and the EDFA [21]. In [135] a GA optimization applied to a more difficult problem of a multistage EDFA with complex structures which employed also gain flattening filters based on LPG as we show in a previous section.…”

Section: Optical Amplifiersmentioning

confidence: 99%