Excitation Of Er3 Research Articles

Er3+ -doped oxyfluoroborosilicate glass ceramics with embedded CaF2 nanoparticles for 1.53 μm broad band applications

The CaF2 based oxyfluoroborosilicate glasses and glass ceramics doped with Er3+ ions were prepared via melt quench process followed by heat treatment and characterized for 1.53 μm broadband applications. The optimized glass ceramic sample was obtained at 450oC/1h heat treatment. The Er3+ concentration was optimized as 1.0 mol% for efficient emission at 460 nm excitation through concentration dependent luminescence analysis. The spectroscopic parameters such as Ωλ=2,4,6 parameters and the radiative parameters such as spontaneous transition probability rates (AR), branching ratios (βR) and decay times (τR) were calculated applying the standard Judd-Ofelt theory. The effective bandwidth (Δλeff), stimulated emission cross-section (σe), gain bandwidth (σe×Δλeff), quantum efficiency (η) and figure of merit (σe×τR) were calculated as 25.78 nm, 13.42×10-21 cm2, 3.46×10-26 cm3, 82.83% and 5.32×10-23 cm2s, respectively for the optimized glass ceramic sample. The exchange type of energy transfer among the excited Er3+ ions results the quenching in luminescence and the non-exponentiality in decay curves. The systematic investigations carried out indicate that the glass ceramic obtained at 450oC/1h heat treatment was proficient for 1.53 μm broadband fiber lasers and optical amplifiers in S and C band communication window.

Comparing Pr3+ and Nd3+ for deactivating the Er3+: 4I13/2 level in lanthanum titanate glass

Erbium lanthanum titanate glasses were prepared by levitation melting for the spectroscopic study of ways to promote the mid-infrared fluorescence. Two series of heavily erbium doped glasses (15 wt%) were prepared with the addition of either Pr3+ or Nd3+ in amounts relative to Er3+ of 0.05, 0.1, and 0.2. Both ions quench the lower Er3+ laser level with the Pr3+ doing so more rapidly. Although high co-dopant concentrations result in higher energy transfer, as clearly evidenced in upconversion and downconversion fluorescence measurements, the mid-infrared lifetime also suffers a reduction and, therefore, a balance must be struck in the co-dopant concentration. Lifetime and spectral measurements indicate that, at a fixed relative co-dopant amount, Pr3+ is more effective than Nd3+ at removing the bottleneck of the Er3+ 4I13/2 level. Moreover, consideration of the lifetimes alongside the absorption data of the individual ions indicates that despite the large absorption cross-section of Nd3+ at 808 nm, the concentration needed to yield more absorbed power than utilizing direct 976 nm excitation of Er3+ results in unfavorable lifetimes of the mid-infrared transition. In the end, Pr3+ prevails as the superior co-dopant in terms of the effects on fluorescence lifetimes as well as potential laser system design considerations. In a unique self-doping approach, a reducing melt atmosphere of Ar instead of O2 creates a small fraction of Ti3+. In 5Er2O3-12La2O3-83TiO2 glass, the presence of Ti3+ quenches the 4I13/2 emission about 2.6 times more than the 4I11/2 when lifetimes are compared to an O2 melt environment. As an additional means of increasing the mid-infrared emission, the effect of temperature on the mid- and near- infrared lifetimes of a lightly doped lanthanum titanate composition is investigated between 77-300 K. The mid-infrared lifetime increases by ∼30% while the near-infrared lifetime increases by ∼10%, which suggests in addition to co-doping, active cooling of the gain media will further enhance performance.

The influence of Al2O3 concentration on the NaYF4 crystallization in oxyfluoride glass–ceramics

AbstractThe influence of Al2O3 addition on the precipitation of NaYF4 crystals in oxyfluoride glasses has been investigated through the thermal, structural, and optical characterization of the parent glasses and corresponding glass–ceramics (GCs). The high‐resolution transmission electron microscopy analysis of the GC with 5 mol% of Al2O3 shows the presence of phase‐separated droplets about 69 nm in size containing several NaYF4 nanocrystals with the diameter of about 10–15 nm. Raman and magic angle spinning nuclear magnetic resonance (MAS‐NMR) spectroscopy were used to examine the structural changes attributed to the addition of Al2O3. The 19F MAS‐NMR analysis indicated that fluorine atoms are present in different chemical environments (Na–F, Na–Si–F, Na–Al–F, and NaYF4). The increasing amount of Al2O3 reduces the crystallization of NaYF4 phase due to the increased fraction of fluorine bound in Na–Al–F environments. The visible luminescence investigation of the glasses and GCs demonstrated that the intensity of Er3+ ions emission transitions in the GCs was higher than that of the parent glass. This difference was attributed to the presence of Er3+ ions bound in NaYF4 crystalline phase. Further evidence that the Er3+ ions were present in NaYF4 phase was provided by the fact that the excited level Er3+:4S3/2 lifetime was increased in GCs as compared to parent glass.

Photoionisation detection of a single Er3+ ion with sub-100-ns time resolution.

Efficient detection of single optical centres in solids is essential for quantum information processing, sensing and single-photon generation applications. In this work, we use radio-frequency (RF) reflectometry to electrically detect the photoionisation induced by a single Er3+ ion in Si. The high bandwidth and sensitivity of the RF reflectometry provide sub-100-ns time resolution for the photoionisation detection. With this technique, the optically excited state lifetime of a single Er3+ ion in a Si nano-transistor is measured for the first time to be [Formula: see text]s. Our results demonstrate an efficient approach for detecting a charge state change induced by Er excitation and relaxation. This approach could be used for fast readout of other single optical centres in solids and is attractive for large-scale integrated optical quantum systems thanks to the multi-channel RF reflectometry demonstrated with frequency multiplexing techniques.

Enhancement of the Electroluminescence from Amorphous Er-Doped Al2O3 Nanolaminate Films by Y2O3 Cladding Layers Using Atomic Layer Deposition.

Amorphous Al2O3-Y2O3:Er nanolaminate films are fabricated on silicon by atomic layer deposition, and ~1530 nm electroluminescence (EL) is obtained from the metal-oxide-semiconductor light-emitting devices based on these nanofilms. The introduction of Y2O3 into Al2O3 reduces the electric field for Er excitation and the EL performance is significantly enhanced, while the electron injection of devices and the radiative recombination of doped Er3+ ions are not impacted. The 0.2 nm Y2O3 cladding layers for Er3+ ions increase the external quantum efficiency from ~3% to 8.7% and the power efficiency is increased by nearly one order of magnitude to 0.12%. The EL is ascribed to the impact excitation of Er3+ ions by hot electrons, which stem from Poole-Frenkel conduction mechanism under sufficient voltage within the Al2O3-Y2O3 matrix.

Generation of Pure Green Up-Conversion Luminescence in Er3+ Doped and Yb3+-Er3+ Co-Doped YVO4 Nanomaterials under 785 and 975 nm Excitation.

Materials that generate pure, single-color emission are desirable in the development and manufacturing of modern optoelectronic devices. This work shows the possibility of generating pure, green up-conversion luminescence upon the excitation of Er3+-doped nanomaterials with a 785 nm NIR laser. The up-converting inorganic nanoluminophores YVO4: Er3+ and YVO4: Yb3+ and Er3+ were obtained using a hydrothermal method and subsequent calcination. The synthesized vanadate nanomaterials had a tetragonal structure and crystallized in the form of nearly spherical nanoparticles. Up-conversion emission spectra of the nanomaterials were measured using laser light sources with λex = 785 and 975 nm. Importantly, under the influence of the mentioned laser irradiation, the as-prepared samples exhibited bright green up-conversion luminescence that was visible to the naked eye. Depending on the dopant ions used and the selected excitation wavelengths, two (green) or three (green and red) bands originating from erbium ions appeared in the emission spectra. In this way, by changing the UC mechanisms, pure green luminescence of the material can be obtained. The proposed strategy, in combination with various single-doped UC nanomaterials activated with Er3+, might be beneficial for modern optoelectronics, such as light-emitting diodes with a rich color gamut for back-light display applications.

The investigation of Er3+ fluorescence properties on femtosecond-laser-written LiNbO3 dual-line and depressed-cladding waveguides

The dual-line and depressed-cladding waveguides are fabricated by femtosecond laser (fs-laser) in Er3+, MgO co-doped nearly stoichiometric LiNbO3 (Er3+:MgO:NSLN) crystals. Single-mode propagation at 1064 nm can be supported inside both two waveguides, in which the 980 nm excited green up-conversion emission can be enhanced. The confocal micro-photoluminescence (µ-PL) spectroscopy has been performed to investigate the changes of Er3+ fluorescence properties in fs-laser modified regions. Under 980 nm excitation, the fluorescence intensity of green up-conversion and near-infrared (NIR) emission is reduced by ~5% in modified areas. However, there is an increase for intensity of 532 nm excited Er3+ emission line (at ~1550 nm). Our work paves a way for fabricating novel waveguide amplifiers as well as lasers, and studying physical mechanism on fs-laser-processing of Er3+:MgO:NSLN crystals.

Tunable green/yellow upconversion emission and enhancement of the NIR luminescence in BaLaAlO4:Er3+ phosphors by codoping with Yb3+ ions

This work reports the structural, morphological and luminescent properties of BaLaAlO4 doped with Er3+ and Yb3+ ions (BAL:Er,Yb). These phosphors were synthesized by the combustion method. The Yb concentration was varied from 0 to 12 mol% while the Er3+ concentration was fixed to 3 mol%. According to the analysis by X-ray diffraction, all the samples doped with different content of Yb presented an orthorhombic phase. The scanning electron microscopy revealed that the undoped BAL is formed by microcubes. For Yb concentrations of 0.5 and 1 mol%, the amount of cubes diminished by ≈ 70% and other morphologies such as 3D rectangles, nanorods and coalesced microparticles appeared. If the BAL:Er,Yb phosphors are doped with Yb concentrations of 3–7 mol%, only coalesced microparticles with irregular morphology are visualized. Moreover, nanorods mixed with coalesced microparticles are again observed in the sample doped with 12 mol% of Yb. On the other hand, the BAL:Er,Yb phosphors presented green and red upconversion emission bands after excitation with NIR light at 980 nm. Additionally, the BAL:Er,Yb phosphors showed an intense NIR emission band at 800 nm, which resulted from excitation of Er3+ ions. The BAL phosphors doped with 7 and 12 mol% of Yb were excited with a low power NIR LED of 70 mW and produced luminance values of 1365 and 1813 cd/m2 for the green and yellow emissions, respectively. Such high luminance and the emission of NIR light suggest that the BAL phosphors are good candidates for applications in lighting, displays and bioimaging.

Yellow emission from vertically integrated Ga2O3 doped with Er and Eu electroluminescent film

Yellow color from vertically integrated light emitting device (LED) was reported. The multilayer structured Er and Eu doped Ga2O3 films were deposited on sapphire and GaAs substrates by alternate-target pulsed laser deposition. The structure, surface morphology, and optical properties of the films were systematically investigated. Bright yellow electroluminescence originated from the combined simultaneous emission of excited Er3+ (529, 550 nm) and Eu3+ (615 nm) can be observed with the naked eyes at a low driven voltage of 10 V. Parameters of the yellow emission for the chromaticity diagram were calculated to be x = 0.4379, y = 0.5343. It is determined that the optically active Er and Eu ions are simultaneously activated by defect-assisted carrier recombination excitation. We believe that this work will provide a prospect for realizing low-voltage driven color LED using rare earth doped Ga2O3 films.

Sensitized electroluminescence from erbium doped silicon rich oxynitride light emitting devices

Erbium doped Si-related compound films, with the 1540 nm emission coinciding with the minimum loss window of optical telecommunication, are regarded as appealing platforms of light sources for silicon photonics. In many previous reports, however, the unipolar carrier injection in silicon oxide/nitride films leads to favorable impact excitation of Er rather than sensitization, requiring high onset voltage that is not compatible with Si microelectronics. Silicon rich oxynitride (SRON) with tunable bandgap enables equivalent bipolar injection, yet there are few reports about light emitting devices (LEDs) based on this material with Er doping. Here, sensitized electroluminescence (EL) from erbium doped SRON with an onset voltage as low as 5 V has been demonstrated. The sensitization mechanism is evaluated by correlating the evolution of charge transport in SRON films subjected to different thermal treatments with that of Er3+ EL. The EL can be attributed to bipolar Poole-Frenkel injection of carriers and subsequent capture by Si dangling bond related trap states, followed by energy transfer to Er3+ ions. These results indicate that SRON serves as a promising Er3+ host for complementary metal-oxide-semiconductor (CMOS) compatible light sources.

The Probable Projectile-Target Reactions to Synthesize SHE 304–312,314124 and the Predictions of α Decay Chains

The probable projectile-target reactions to synthesize SHE, Z = 124, are identified as 58Fe+248-254Cf, 64Ni+240–248,250Cm, 70Zn+236–242,244Pu, 76Ge+232–236,238U, and 82Se+228–230,232Th leading to 304–312,314124. The ER excitation functions in xn (x = 1 to 5 for hot fusion and x = 1 to 2 for cold fusion) evaporation channel are calculated. The sums of all xn channel ER cross-sections are listed and predicted the most suitable combinations. It is observed that the compound nucleus having neutron number up to N = 184 have finite ER cross-section values and we conclude that the CN having neutron number N > 184 could not be synthesized in the laboratory in near future. We have also studied the alpha decay properties of the isotopes mentioned above using modified generalized liquid drop model (MGLDM). In our study, 4α chains were observed for 304124, 3α chains observed for 305124, 6α chains observed for 306–307124, and 5α chains observed for 308–312, 314124.

Structural characterization and photoluminescence of (Gd1-xErx)2O3 nanophosphors synthesized by co-precipitation of layered precursors

In this paper, the layered (Gd1-xErx)2(OH)5NO3·nH2O (LGEH) with a variable content of erbium were synthesized by controlled double-jet precipitation (CDJP) at a constant pH value. The effect of pH co-precipitation on the morphology, crystallinity, porosity of the LGEH, as well as on the spectral-luminescent properties of oxide nanophosphors obtained by their heat treatment is significant. We have found that the samples with the lowest disordering and the highest of photoluminescence (PL) intensity of Er3+ ions are obtained from amorphous sponge-like precursor co-precipitated at pH 9.5. The PL of nanostructural (Gd1-xErx)2O3 depends on both structural-morphology properties and samples composition. It was also found that efficiency of radiative and non-radiative relaxation channels for excited Er3+ ions mainly depends on three factors: nanocrystals size, specific surface area and erbium concentration. For explanation of the PL behavior in the green and red spectral ranges, the energy diagram showing the intracenter energy transitions and intercenter energy migration in synthesized nanophosphors was proposed.

Excitation-dependent enhancement and quenching of the 1.54 μm emission from Er3+ ions in dichroic Cu nanocomposite glass

The 1.54 μm emission of Er3+ ions embedded in a dichroic Cu nanocomposite glass is shown to be either quenched or enhanced depending on the excitation wavelength. The synthesized material consisted of an aluminphosphate matrix co-doped with Cu and Er as prepared by thermal processing, and characterized by optical absorption and photoluminescence (PL) spectroscopy including an assessment of decay dynamics. The extinction spectrum presented a broad surface plasmon resonance (SPR) band for Cu nanoparticles (NPs) around 588 nm, while the glass appeared to scatter red light but transmit blue, i.e. exhibiting dichroism. Interestingly, the PL obtained for the 4I13/2 → 4I15/2 emission around 1.54 μm was enhanced under the excitation of the 4I15/2 → 4F9/2 transition at 650 nm, which turned out to be located toward the low energy wing of the SPR of Cu NPs. About a 12% PL boost was estimated relative to a merely Er3+-doped reference. Conversely, a PL quenching effect was manifested for resonant Er3+ excitations (e.g. 4I15/2 → 2H11/2 transition at 520 nm) overlaid with the 3d → 4sp interband transitions absorption in copper. It is suggested that favorable conditions for the PL enhancement are achieved for when the excitation of Er3+ ions can benefit from light scattering by plasmonic Cu particles, while an excitation energy transfer from Er3+ to Cu NPs via interband transitions leads to the quenching.

Polarization-resolved Er emission in Er doped GaN bulk crystals

Erbium-doped GaN (Er:GaN) quasi-bulk crystals are emerging as a promising novel gain medium for high energy lasers emitting at the retina-safe wavelength window of 1.5 μm. We report the polarization-resolved photoluminescence (PL) emission spectroscopy studies, which revealed that the pumping efficiency with the excitation polarization parallel to the c-axis of GaN (E⇀||c⇀) is significantly higher than that with the excitation polarization perpendicular to the c-axis of GaN (E⇀⊥c⇀). This phenomenon is a direct consequence of the inherent polar wurtzite GaN lattice, giving rise to a net local field, surrounding each Er ion, along the c-axis of GaN. The temperature dependent behaviors of the PL emission spectra were explained in terms of the Boltzmann population distributions among sublevels within the 4I15/2 ground state and the 4I13/2 first excited state of Er3+ in GaN, thereby providing an improved understanding regarding the origin of the dominant emission lines observed near 1.5 μm. The results suggested that the polarization field in GaN can be exploited to enhance the effective Er excitation cross section by manipulating the polarization of the excitation light source.

Характеристики апконверсионной люминесценции порошков CaF-=SUB=-2-=/SUB=- : Er при возбуждении лазерным излучением с длиной волны 1.5 μm

The characteristics of upconversion luminescence of CaF2:Er crystalline powders were investigated upon excitation of Er3+ ions to the 4I13/2 level by laser radiation at 1531.8 nm. The energy yield values of upconversion luminescence were determined for the spectral ranges 380–780 and 380–1100 nm. It was found that upconversion luminescence of CaF2:Er powders with concentrations of 0.5, 2, 4, 6, 8, 10, 11, 13, 15, and 17% of Er3+ ions is characterized by correlated color temperatures of about 5100, 2142, 1726, 1738, 1773, 1757, 1762, 1765, 1735, and 1714 K, respectively.

Innovative silicon compatible materials for light emitting devices

The paper reports the potentialities of innovative silicon compatible materials for light emitting devices. In particular thin films of Er doped yttrium oxide have been synthesized by a technique totally compatible with ULSI processes. Through the structural characterization, we will verify the high stability of the film and the good dopant dissolution. Moreover, by the investigation of the optical properties, we will demonstrate that the use of this compound is effective to introduce more than 10 21 Er/cm 3 in optically active state, value that cannot be reached in other Si compatible materials. The influence of Er content on the optical properties will be described in details. Moreover, we will propose the introduction of a proper sensitizer for Er, bismuth, in the same thin film. In particular, we will show that the (Er+Bi) co-doped yttrium oxide is a perfect host to overcome another important drawback of Er doped materials that is its low absorption cross section. The influence of Bi and Er contents on optical properties will be extensively discussed along the paper. Through the optimization of ratio between Bi and Er concentrations, high energy transfer efficiency will be reached with simultaneously a consistent increase of the effective Er cross section. A factor of more than three orders of magnitude have been obtained with respect to the direct excitation of Er.

Effects of forming gas annealing on luminescence properties of erbium silicate thin films

While hydrogen passivation has led to enhanced luminescence in many erbium doped materials, its effects on Er oxides/silicates compounds has rarely been demonstrated. Here we report effects of forming gas annealing on the luminescence properties in such Er compound materials. A broad band photoluminescence in the ultraviolet/visible range, likely arising from structural defects in the material, is significantly suppressed after forming gas annealing. Concurrently, the Er near-infrared luminescence intensity and its lifetime increase by about a factor of two and three, respectively. The samples are further characterized with Rutherford backscattering for composition information, optical absorption for optically excitable Er concentrations and extended x-ray absorption fine structures for Er local environments. We discuss the hydrogen passivation effects in the context of diffusion limited relaxation processes and suggest pathways to further improving near-infrared luminescence properties in Er compound materials.

Near ultraviolet excited down conversion Eu and Er co-doped CaAl2O4 color tunable nano-phosphors: Structural, morphological and photolumniscent characteristics

Abstract A series of CaAl2O4:Eu3+ (1 mol%) co-doped with Er3+ (0, 1, 2, and 5 mol%) was synthesized by urea assisted combustion method at 600 °C and further calcinations was done at 1000 °C to enhance the crystalline character and luminescence properties. Synthesized samples were characterized structurally and optically using the X-ray diffraction (XRD) and spectrofluorometer respectively. From XRD analysis, monoclinic phase of CaAl2O4 is reported in all the samples indicating that doping of Eu3+ and Er3+ do not change the crystalline structure of calcium aluminate. Both Eu3+ and Eu2+ states were detected in the synthesized materials whose ratio changes with calcination as well as with co-doping of the Er3+ ions. CaAl2O4:Eu3+ (1 mol%) synthesized at 600 °C show high intense peak around 440 nm due to presence of Eu2+ state, whose intensity decrease with co-doping and upon calcination where as at the same time intensity of peak in the red region due to the presence of Eu3+ increases. In the compounds calcined at 1000 °C, electric dipole 5D0 → 7F3 transition of Eu3+ at 657 nm appears as peak with highest intensity. The Er3+ ion acts as sensitizer and enhances the luminescent properties of co-doped samples.

Sensitization of upconverting nanoparticles with a NIR-emissive cyanine dye using a micellar encapsulation approach

Photon upconversion nanomaterials have a wide range of applications, including biosensing and deep-tissue imaging. Their typically very weak and narrow absorption bands together with their size dependent luminescence efficiency can limit their application potential. This has been addressed by increasingly sophisticated core–shell particle architectures including the sensitization with organic dyes that strongly absorb in the near infrared (NIR). In this work, we present a simple water-dispersible micellar system that features energy transfer from the novel NIR excitable dye, 1859 SL with a high molar absorption coefficient and a moderate fluorescence quantum yield to oleate-capped NaYF4:20%Yb(III), 2%Er(III) upconversion nanoparticles (UCNP) upon 808 nm excitation. The micelles were formed using the surfactants Pluronic F-127 and Tween 80 to produce a hydrophilic dye-UCNP system. Successful energy transfer from the dye to the UCNP could be confirmed by emission measurements that revealed the occurrence of upconversion emission upon excitation at 808 nm and an enhancement of the green Er(III) emission compared to direct Er(III) excitation at 808 nm.

Er3+/Dy3+ codoped B2O3-TeO2-PbO-ZnO-Li2O-Na2O glasses: Optical absorption and fluorescence features study for visible and near-infrared fiber laser applications

Using melt quenching method, singly Er3+, Dy3+-doped and Er3+/Dy3+-codoped multicomponent borotellurite glasses in the composition (50-x-y) B2O3-10 TeO2-10 PbO-10 ZnO-10 Li2O-10 Na2O-(x) Er2O3- (y) 0.5 Dy2O3 ((x=0.5, 1.0; y=0); (x=0; y=0.5, 1.0); and (x=0.5; y=0.5, 1.0; x=1.0; y=0.5, 1.0)) (mol%) were synthesized. For the fabricated samples, optical absorption, photoluminescence excitation (PLE), photoluminescence (PL), near-infrared (NIR) fluorescence and decay lifetime measurements have been performed. For singly Er3+ and Dy3+-doped samples, Judd-Ofelt (J-O) parameters, Ωt, were calculated following the absorption spectra and the derived Ωt parameters are utilized to predict respective radiative features for these glasses. The PL spectra of the Er3+ and Dy3+ singly doped glasses, excited at 378 nm (Er3+: 4I15/2 → 4G11/2) and 350 nm (Dy3+: 6H15/2→4M15/2,6P7/2), show important green and yellow emission bands at wavelengths 554 nm (Er3+: 4S3/2→4I15/2) and at 574 nm (Dy3+: 4F9/2→6H13/2), respectively. The PL decay curves for Er3+: 4S3/2 level and Dy3+: 4F9/2 level follow single exponential, and non-exponential nature, respectively, for the singly Er3+ and Dy3+-doped samples. For singly 1.0 mol% Er3+ and 0.5 mol% Dy3+-doped samples, the evaluated stimulated emission cross-sections (σPE) for the transitions at λem. = 0550 nm, and 574 nm are equal to 20.923×10-20 cm2 and 0. 526×10-20 cm2, while the gain bandwidths are 3.975×10-25 cm3 and 0.789×10-26 cm3, respectively. For all the Er3+-containing glasses, a broad NIR emission band centered at 1.532 μm (4I13/2→4I15/2) is noticed under both 808 and 980 nm laser diode (LD) excitations, whereas the singly 1.0 mol% Er3+-doped sample shows the highest NIR emission intensity with a full-width at half maximum (FWHM) equal to ~69 and 62 nm, respectively, at these pumping wavelengths. Moreover, the calculated highest (σPE) of 1532 nm NIR emission when pumped by 980 nm is 2.669×10-20 cm2 and gain per unit length is 1.06×10-23 cm2s, for singly 1.0 mol% Er3+-doped glass. Additionally, for Er3+/Dy3+-codoped samples, with the decrement of Er3+: NIR emissions, energy transfer (ET) from Er3+→Dy3+ ions is identified upon both 808 and 980 nm LD pumping. For all Er3+/Dy3+-codoped glasses, the Er3+: 4I13/2 level decay time decreased with increasing Dy2O3 content and the NIR fluorescence decay curves exhibit single exponential nature. Under 980 nm excitation, the computed energy transfer efficiency (ηET) from Er3+: 4I13/2 to Dy3+: 6H11/2 level is 22.9% for the 1.0 Er3+/0.5 Dy3+ (mol%)-codoped glass. Under 808 and 980 nm pumping, the mechanism of the ET processes between Er3+ and Dy3+ ions was discussed in detail. Further, for 1.0 mol% Er3+ singly doped sample, a theoretical gain coefficient value of 17.01 dB/cm is obtained with an excited Er3+ ion fractional factor of 0.6. Following the explored visible and NIR optical results, the synthesized glasses might be useful for visible and NIR fiber lasers application.