NIR Emission Band Research Articles

Broadband emitting Fe3+‐doped double perovskite‐type antimonates phosphors for NIR spectroscopy applications

AbstractNear‐infrared (NIR) broadband emitting phosphors regarded as ideal miniaturized NIR light sources, have recently received considerable attention. Nevertheless, the lack of appropriate substitutes for poisonous Cr3+ still poses a significant obstacle. Here, by selecting double perovskite‐type antimonates compound Ca2LuSbO6 (CLSO) and Ca2YSbO6 (CYSO) as the hosts, the broadband NIR‐emitting CLSO: 0.008Fe3+ and CYSO: 0.01Fe3+ phosphors are firstly reported. The above materials exhibit a rare long‐wavelength NIR emission band peaking at 927 and 938 nm, respectively. Accordingly, their full widths at half maximum are 128 and 135 nm, respectively. Moreover, the mechanism of their concentration quenching and thermal quenching effect are discussed. The IQEs of CLSO: 0.008Fe3+ is measured to be 69%, which is superior to many available Fe‐activated phosphors. Integrating the bond valence theory analysis with electron paramagnetic resonance measurement, Fe3+ only substitutes the lattice site of the Sb atom to generate a [FeO6] octahedron accompanying lattice distortion. Significantly, the as‐fabricated phosphor‐converted light emitting diodes device shows substantial applications in night vision and NIR spectroscopy detection. This work contributes to novel insights into the photoluminescence and site occupancy of Fe3+, thereby paving a new avenue for exploring next‐generation environmentally‐friendly and nontoxic NIR light‐emitting materials.

Impact of varying Li+ concentration on the upconversion emission and temperature sensing characteristics of YVO4: Tm3+/Yb3+ phosphor

A series of Li+ codoped YVO4: Tm3+/Yb3+ phosphors were prepared by Pechini sol–gel reaction technique. Structural study of the material confirms the crystal structure of the prepared samples and also gives information about the crystallite size and phase purity with the variation of Li+ ion concentrations. Emission peaks around ∼ 476, and ∼ 799 nm corresponds to the 1G4→3H6, and 3H4→3H6 transitions, which could be seen under irradiation of NIR (980 nm) laser light. Li+ (10 mol%) codoped sample shows maximum upconversion. Li+ doping significantly increases the up-conversion emission intensities by more than 5 times for emission peaks around 476 nm and 799 nm.The possible explanation for the increase in UC (Upconversion) emission intensity is attributed to both improved crystallinity and crystal field modification around Tm3+ ions. The variation of UC emission spectra with respect to pump power was observed to investigate the underlying UC luminescent mechanism in YVO4: Tm3+/Yb3+ codoped with Li+ (10 mol%). The multiphoton involvement is observed in the power-dependent study of upconverted blue and NIR emission bands. Widely used fluorescence intensity ratio (FIR) technique was used to evaluate the temperature sensing capability of the optimized Li+ codoped phosphor. The FIR study of Stark components 3F2, and 3H4 levels indicates that this material is an efficient material for temperature sensing. The optimized sample, doped with Li+, exhibits relative sensitivity of 0.78% K−1 at a temperature of 548 K. This material have utility in both light-emitting diodes and as a temperature-sensing probe.

Novel strategies to tune the color emission of Bi2Ti2-xZrxO7:Er3+,Yb+3 upconversion phosphors: Substituting Ti by Zr and annealing at high temperatures

Bi2Ti2-xZrxO7:Er3+,Yb3+ phosphors were synthesized with different content of Zr (X = 0–1.5) by combustion method at 550 °C, producing a mixture of Bi2Ti2O7/Bi4Ti3O12 phases. After increasing the synthesis temperature to 1000 °C, a pure Bi2Ti2O7 (BiTiO) phase was obtained as well as porous coalesced microparticles (2–10 µm) with pore sizes of 110–420 nm. Those samples produced green (548 nm)/red (655 nm) and NIR (1530 nm) emission bands after excitation with 980 nm and their color emission was tuned from green to yellow–red or viceversa using two strategies: i) by increasing the Zr content in the Bi2Ti2-xZrxO7:Er3+,Yb3+ host (from X = 0 to 1) or ii) by increasing the synthesis temperature from 550 to 1000 °C. Interestingly, the intensity of the NIR and red emission bands was enhanced with the content of OH groups on the surface of the BiTiO:Yb,Er phosphors.

Noncentrosymmetric Lanthanide-Based MOF Materials Exhibiting Strong SHG Activity and NIR Luminescence of Er3+: Application in Nonlinear Optical Thermometry

Optically active luminescent materials based on lanthanide ions attract significant attention due to their unique spectroscopic properties, nonlinear optical activity, and the possibility of application as contactless sensors. Lanthanide metal-organic frameworks (Ln-MOFs) that exhibit strong second-harmonic generation (SHG) and are optically active in the NIR region are unexpectedly underrepresented. Moreover, such Ln-MOFs require ligands that are chiral and/or need multistep synthetic procedures. Here, we show that the NIR pulsed laser irradiation of the noncentrosymmetric, isostructural Ln-MOF materials (MOF-Er3+ (1) and codoped MOF-Yb3+/Er3+ (2)) that are constructed from simple, achiral organic substrates in a one-step procedure results in strong and tunable SHG activity. The SHG signals could be easily collected, exciting the materials in a broad NIR spectral range, from ≈800 to 1500 nm, resulting in the intense color of emission, observed in the entire visible spectral region. Moreover, upon excitation in the range of ≈900 to 1025 nm, the materials also exhibit the NIR luminescence of Er3+ ions, centered at ≈1550 nm. The use of a 975 nm pulse excitation allows simultaneous observations of the conventional NIR emission of Er3+ and the SHG signal, altogether tuned by the composition of the Ln-MOF materials. Taking the benefits of different thermal responses of the mentioned effects, we have developed a nonlinear optical thermometer based on lanthanide-MOF materials. In this system, the SHG signal decreases with temperature, whereas the NIR emission band of Er3+ slightly broadens, allowing ratiometric (Er3+ NIR 1550 nm/SHG 488 nm) temperature monitoring. Our study provides a groundwork for the rational design of readily available and self-monitoring NLO-active Ln-MOFs with the desired optical and electronic properties.

Designing and controlling the Ni2+-activated (Zn, Mg)Al2O4 spinel solid-solution for phosphor-converted broadband near-infrared illumination

Ni2+-activated Zn1−xMgxAl2O4 phosphors exhibit broadband NIR emission band of 1000–1600 nm and are utilized in the application of broadband pc-NIR LEDs.

An Efficient Perovskite‐Like Phosphor with Peak Emission Wavelength at 850 nm for High‐Performance NIR LEDs

AbstractNear‐infrared (NIR) phosphor‐converted light‐emitting diodes (pc‐LEDs) are an emerging light source demanded for the miniaturization of NIR spectroscopy. However, the photoelectric efficiency and spectral properties of NIR pc‐LEDs are still very limited due to a lack of efficient broadband NIR phosphors with peak emission wavelength >850 nm. Here, a novel Cr3+‐activated perovskite‐like Mg4Ta2O9 phosphor is reported, which exhibits a broad NIR emission band peaking at 850 nm with a high internal (external) quantum efficiency of 72% (33.4%). The fabricated NIR pc‐LED shows a broad emission band covering the whole 700–1100 nm spectrum range with a photoelectric conversion efficiency of 22.1% at 10 mA. This work may provide a new paradigm for the discovery of Cr3+ singly doped NIR phosphors with excellent performance.

Efficient dual mode emission in Ce3+/Yb3+/Er3+ doped yttrium aluminium gallium garnet for led device and optical thermometry

By utilizing the effective energy transfer from Ce3+ to Yb3+, Er3+ and from Yb3+ to Er3+ authors have achieved dual mode emission in Y3Al4GaO12 activated with Ce3+/Yb3+/Er3+ ions. Surface morphological and elemental compositions of the prepared samples have been examined using field emission scanning electron microscope (FE-SEM) and energy dispersive spectroscopy (EDS) analysis, respectively. The chemical state of the dopant ions is confirmed by the X-ray photoelectron spectroscopy (XPS). On excitation with 438 nm the prepared material has shown broad visible emission band around 511 nm due to the electronic transition of Ce3+ ion. In addition to this sample has also shown NIR emission bands centered around 1024 nm and 1480 nm from Yb3+ and Er3+ ions, respectively. The emission band at 1024 nm could be due to the quantum cutting (QC) process. Furthermore, up-conversion (UC) emission against temperature and laser power variations is studied on 980 nm excitation wavelength. The prepared sample is used to fabricate visible and NIR LED devices by coating of sample on blue LED chip. Along with this demonstration, optical thermometry ability of the material is studied using emission intensity ratio of two emitting levels. Studies suggest that the prepared material could be useful as dual mode emitting phosphor and LED.

Hydroporphyrin-Doped Near-Infrared-Emitting Polymer Dots for Cellular Fluorescence Imaging.

Near-infrared (NIR) fluorescent semiconductor polymer dots (Pdots) have shown great potential for fluorescence imaging due to their exceptional chemical and photophysical properties. This paper describes the synthesis of NIR-emitting Pdots with great control and tunability of emission peak wavelength. The Pdots were prepared by doping poly[(9,9-dioctylfluorenyl-2,7-diyl)-alt-co-(1,4-benzo-(2,1',3)-thiadiazole)] (PFBT), a semiconducting polymer commonly used as a host polymer in luminescent Pdots, with a series of chlorins and bacteriochlorins with varying functional groups. Chlorins and bacteriochlorins are ideal dopants due to their high hydrophobicity, which precludes their use as molecular probes in aqueous biological media but on the other hand prevents their leakage when doped into Pdots. Additionally, chlorins and bacteriochlorins have narrow deep red to NIR-emission bands and the wide array of synthetic modifications available for modifying their molecular structure enables tuning their emission predictably and systematically. Transmission electron microscopy (TEM) and dynamic light scattering (DLS) measurements show the chlorin- and bacteriochlorin-doped Pdots to be nearly spherical with an average diameter of 46 ± 12 nm. Efficient energy transfer between PFBT and the doped chlorins or bacteriochlorins decreases the PFBT donor emission to near baseline level and increases the emission of the doped dyes that serve as acceptors. The chlorin- and bacteriochlorin-doped Pdots show narrow emission bands ranging from 640 to 820 nm depending on the doped dye. The paper demonstrates the utility of the systematic chlorin and bacteriochlorin synthesis approach by preparing Pdots of varying emission peak wavelength, utilizing them to visualize multiple targets using wide-field fluorescence microscopy, binding them to secondary antibodies, and determining the binding of secondary antibody-conjugated Pdots to primary antibody-labeled receptors in plant cells. Additionally, the chlorin- and bacteriochlorin-doped Pdots show a blinking behavior that could enable their use in super-resolution imaging methods like STORM.

Optical Temperature Sensor Capabilities of the Green Upconverted Luminescence of Er3+ in La3NbO7 Ceramic Powders

We present a study of the Er3+ upconverted luminescence in erbium doped Lanthanum Niobium Oxide, La3NbO7, ceramic powder, prepared by solid state reaction. This study focuses on the analysis of the feasibility of this system as a temperature sensor. Efficient UC luminescence was observed under the 975 nm excitation showing intense green, red and NIR (850 nm) emission bands. The NIR luminescence centred at about 850 nm and lying on the first biological window is mainly insensitive to the temperature. In contrast, the upconverted green bands, associated with the (2H11/2,4S3/2) →4I15/2 transitions, showed a high sensibility to temperature. Their temperature dependence was studied from RT up to 525 K, paying special attention to the physiological range of temperature (303–318 K). The high thermal sensitivities obtained, in comparison with other Er3+ and Er3+-Yb3+ based optical temperature sensors in such ranges, suggest the potential application of this phosphor in thermal sensing, suitable for both biological systems and other industrial applications requiring higher temperatures.

1.5 µm NIR emission property of erbium doped bismuth borate glasses for optical amplifier applications

B2O3 –Bi2O3 – Gd2O3 – K2O – Li2O (BBiGdKLi) and Erbium oxide (Er2O3) doped BBiGdKLiEr with Er: 0.05, 0.1, 0.5, 1.0, 2.0 and 3.0 concentration are prepared by melt-quenching technique at a temperature 1250 °C to study FTIR, photoluminescence NIR emission and fluorescence decay. B-O-B bending vibrations of boron at 721 cm−1 and B-O-M below 500 cm−1 (M: Bi,Gd,K & Li) were revealed in the FTIR spectrum of BBiGdKLi glass. NIR emission band of Er3+ was identified for BBiGdKLiEr glasses for the different concentrations at 1531 nm when they de-excited from 4I13/2 →4I15/2 level. Fluorescence quench is not observed due to Bi3+ ion NIR emission band falls in the Er3+ NIR emission band which caused to optical amplification. Highest emission intensity and fluorescence decay lifetime (0.108 ms) are found for the corresponding BBiGdKLiEr3.0 and BBiGdKLiEr2.0 glasses, respectively. The results concluding that BBiGdKLiEr3.0 glass could find its amplification feature in optical communications for 1.5 µm region.

Acidic pH-Activatable Visible to Near-Infrared Switchable Ratiometric Fluorescent Probe for Live-Cell Lysosome Targeted Imaging.

Here, we have designed and synthesized acidic pH-activatable visible to NIR switchable ratiometric pH-sensitive fluorescent dye. The design consists of a cell-permeable organic probe containing a lysosome targeting morpholine functionality and an acidic pH-activatable oxazolidine moiety. The visible closed oxazolidine form (λabs 418 nm) can be switched to the highly conjugated NIR Cy-7 form (λabs 780 nm) through ring opening of the oxazolidine moiety at acidic pH. This switching of the ratiometric fluorescent probe is highly reversible and can be controlled by pH. NMR, UV/vis, and fluorescence spectroscopies allowed monitoring of pH switching behavior of the probe. This bioresponsive in situ acidic organelle activatable fluorophore showed reversible pH-switchable ratiometric optical properties, high photostability, huge bathochromic emission shift of 320 nm from basic to acidic pH, off-to-on narrow NIR absorption and emission bands with enhanced molar extinction coefficient at lysosomal pH, good quantum yield, low cytotoxicity, and targeted imaging ability of live cell lysosomes with ideal pKa. The report demonstrated ratiometric imaging with improved specificity of the acidic lysosome while minimizing signals at the NIR region from nontargeted neutral or basic organelles in human carcinoma HeLa and A549 as well as rat healthy H9c2(2-1) live cells, which is monitored by confocal laser scanning microscopy.

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.

Broadband near-infrared BaMSi3O9:Cr3+ (M = Zr, Sn, Hf) phosphors for light-emitting diode applications

Cr3+-Doped BaMSi3O9 (M = Zr, Sn, Hf) NIR-emitting phosphors have been developed, which exhibit a broad NIR emission band over 650–1200 nm with a tunable band maximum longer than 800 nm and a FWHM of more than 155 nm upon blue light excitation.

Enhanced photoluminescence, structural, morphological and antimicrobial efficacy of Co-doped ZnO nanoparticles prepared by Co-precipitation method

ZnO nanoparticles have been successfully prepared by the co-precipitation process with Co: ZnO atomic ratio of 0–7%. The structural, morphological, optical and antibacterial properties of synthesized nanoparticles were investigated. X-ray diffraction (XRD) patterns, Field Emission Scanning Electron Microscopy (FESEM) images, Energy Dispersive X-ray Spectroscopy (EDX) analyses verify the nanopowders. Emission of ZnO enhances several times when Co2+ ion is added with crystals. The intensity much faster increases of the violet and blue emission bands than that of red and NIR emission bands. The XRD patterns showed the (100), (002) and (101) planes are indicated the formation of the single phase appear in the lattice. The crystallite size decrease from 42 ​nm to 34 ​nm for the nanoparticles as dopant concentration is increased. Morphological observations illustrate the development of nanoparticles with notable morphologies. The elemental composition of Co, Zn and O were observed from EDX analysis, which confirmed the purity of the as-prepared nanoparticles. PL spectra showed a strong ultraviolet and visible emission band which may be attributed to the cobalt doping leads to increase in oxygen vacancy and defects. Antibacterial activity of Co/ZnO nanoparticles against Staphylococcus aureus was found significantly higher than that of Escherichia coli microorganism.

Energy transfer induced enhancement in NIR luminescence characteristics of Yb3+/Er3+ co-doped sodium zinc bismuth fluorophosphate glasses

The results pertaining to the energy transfer-based photoluminescence characteristics of Er3+-doped and Yb3+/Er3+ co-doped NaF–ZnO–BiF3–NH4H2PO4 (NZBFP) glasses prepared through melt-quench technique were demonstrated here. By applying McCumber's theory, the absorption, stimulated emission cross-sections and optical gain have been estimated for Yb3+ (0.97 μm) and Er3+ (1.54 μm) ions. Yb3+-doped glass exhibited a sharp emission at 979 nm at 808 nm excitation while Er3+-doped glass displayed a broad NIR emission band at/around 1545 nm for 980 nm excitation. The presence of Yb3+ absorption band along with the Er3+ absorption bands in the co-doped glass suggests the energy transfer (ET) possibility within these ions. On pumping Er3+-doped &yYb3+/Er3+ co-doped NZBFP glasses with 980 nm Laser Diode, a broad Er3+ emission at 1545 nm attributed to 4I13/2 → 4I15/2 is observed in the NIR region. The increasing of Yb3+concentration with respect to Er3+ (fixed to 1 mol%) in co-doped glasses have resulted in enhancement of Er3+ NIR emission because of the resonant energy transfer (ET) process from Yb3+→Er3+. The energy transfer (ET) mechanism has been illustrated from the spectral overlap of Yb3+ emission and Er3+ absorption, Er3+ decay lifetime curves, and partial energy level diagram. Further, the nature of interaction responsible for the energy transfer process (ET) has been explained using Forster-Dexter theory and I–H fitting. In addition, the suitability of the present synthesized fluorophosphate glasses for optical amplifier and NIR laser applications were explored in terms of optical amplification and gain parameters, like effective band-width (Δλeff), stimulated emission cross-section (σe), optical gain (G), and gain bandwidth (ΔG).

Nanoaggregate Probe for Breast Cancer Metastasis through Multispectral Optoacoustic Tomography and Aggregation-Induced NIR-I/II Fluorescence Imaging.

An activatable nanoprobe for imaging breast cancer metastases through near infrared-I (NIR-I)/NIR-II fluorescence imaging and multispectral optoacoustic tomography (MSOT) imaging was designed. With a dihydroxanthene moiety serving as the electron donor, quinolinium as the electron acceptor and nitrobenzyloxydiphenylamino as the recognition element, the probe can specifically respond to nitroreductase and transform into an activated D-π-A structure with a NIR emission band extending beyond 900 nm. The activated nanoprobe exhibits NIR emission enhanced by aggregation-induced emission (AIE) and produces strong optoacoustic signal. The nanoprobe was used to detect and image metastases from the orthotopic breast tumors to lymph nodes and then to lung in two breast cancer mouse models. Moreover, the nanoprobe can monitor the treatment efficacy during chemotherapeutic course through fluorescence and MSOT imaging.

Nanoaggregate Probe for Breast Cancer Metastasis through Multispectral Optoacoustic Tomography and Aggregation‐Induced NIR‐I/II Fluorescence Imaging

AbstractAn activatable nanoprobe for imaging breast cancer metastases through near infrared‐I (NIR‐I)/NIR‐II fluorescence imaging and multispectral optoacoustic tomography (MSOT) imaging was designed. With a dihydroxanthene moiety serving as the electron donor, quinolinium as the electron acceptor and nitrobenzyloxydiphenylamino as the recognition element, the probe can specifically respond to nitroreductase and transform into an activated D‐π‐A structure with a NIR emission band extending beyond 900 nm. The activated nanoprobe exhibits NIR emission enhanced by aggregation‐induced emission (AIE) and produces strong optoacoustic signal. The nanoprobe was used to detect and image metastases from the orthotopic breast tumors to lymph nodes and then to lung in two breast cancer mouse models. Moreover, the nanoprobe can monitor the treatment efficacy during chemotherapeutic course through fluorescence and MSOT imaging.

Enhanced luminescence at 2.88 and 2.04 μm from Ho3+/Yb3+ codoped low phonon energy TeO2–TiO2–La2O3 glass

The high phonon energy and short infrared cut-off wavelength of conventional oxide glass (or crystal) hosts are the limitations to achieve mid-infrared (MIR, λ≥2.5μm) luminescence. In present study, the luminescence performance of low phonon and non-conventional TeO2-TiO2-La2O3-based glass (TTL) host doped with Ho3+ and Ho3+/Yb3+ has been investigated, for visible to MIR range. The MIR emission band with peak at 2.88μm (Ho3+:5I6→5I7) and NIR band at 2.04μm (Ho3+:5I7→5I8) has been realized from Ho3+ singly doped TTL glass due to low phonon energy and extended transmission window of the host. Intensity of MIR and NIR emission bands have enhanced significantly in Ho3+/Yb3+: TTL glass under Yb3+ excitation, signifying an efficient Yb3+→Ho3+ energy transfer. The Judd-Ofelt analysis, on Ho3+ absorption characteristics reveals relatively better radiative transition probability (34.4s−1) and branching ratio (10.5%), which is associated to Ho3+:5I6→5I7 transition. The effective bandwidth of 2.88μm emission band is 180nm, with stimulated emission cross-section is 4.26×10-21cm2 and its gain bandwidth has been evaluated as 7.67×10-26cm3. For 2.04μm (Ho3+:5I7→5I8) emission band, the effective bandwidth of 160.5nm and gain bandwidth of 7.26×10-26cm3 have been accomplished. The non-resonant Förster-Dexter method has been applied to Ho3+/Yb3+: TTL glass on emission (donor, Yb3+) and absorption (acceptor, Ho3+) cross sections. The evaluated donor-donor (CDD) and donor-acceptor (CDA) energy transfer micro-parameters are 1.02×10-38 and 5.88×10-41cm6/s respectively while, maximum energy transfer efficiency has been 80%. In concise, Ho3+/Yb3+ codoped TeO2–TiO2–La2O3 glass host has revealed its potential for MIR to NIR photonic applications.

High Singlet Oxygen Yield Photosensitizer Based Polypeptide Nanoparticles for Low-Power Near-Infrared Light Imaging-Guided Photodynamic Therapy.

NIR photosensitizer is attractive for photodynamic therapy (PDT). Low-power light irradiation and imaging-guided PDT makes it possible to increase tissue penetration depth. The pyrrole-substituted iodinated BODIPY (BDPI) molecule was designed and synthesized, and it possesses an intense NIR absorption and emission band, and exhibits a high singlet oxygen quantum yield (ΦΔ = 0.80) which leads remarkable cytotoxicity upon low power illumination (IC50 = 0.60 μg/mL, 6.1 mW/cm2). After being encapsulated with biocompatibility polypeptide PEG-PLys, polymeric micelles nanoparticles (PBDPI NPs) was obtained that are water-dispersed and passively tumor-targetable. Such enhanced accumulation in tumor area makes it easily traced in vivo due to its NIR fluorescence. In addition, such nanoparticles offer an unprecedented photodynamic therapeutic effect by using a low-power irradiation light, which makes it possible to kill cancer cells in deep tissue efficiently.

Erbium-doped calcium barium phosphate glasses for 1.54 µm broadband optical amplifier

The Er3+-doped calcium barium phosphate glasses with chemical composition 30CaO:20BaO:(50-x)P2O5:xEr2O3 (where x = 0.05, 0.10, 0.50, 1.00 and 2.00 mol%) were prepared by melt-quenching technique. The optical and NIR luminescence properties of the glass samples were investigated to determine the ability for using as broadband optical amplifier. The density, molar volume and refractive index were carried out. The absorption spectra showed 10 absorption bands corresponding to the transitions assigned by 4I15/2→4G11/2 (349 nm), 2G9/2 (403 nm), 4F5/2 (451 nm), 4F7/2 (488 nm), 2H11/2 (522 nm), 4S3/2 (544 nm), 4F9/2 (651 nm), 4I9/2 (803 nm), 4I11/2 (977 nm) and 4I13/2 (1537 nm). Judd-Ofelt analysis was applied in this work and found that the J-O parameters of the CaBaPEr20 glass are 7.44, 2.52 and 4.36 (x 10-20 cm2) for Ω2, Ω4 and Ω6, respectively. Oscillator strength, radiative transition possibility, stimulated emission cross section and branching ratio were also evaluated. NIR luminescence spectra of the CaBaPEr20 glass under 977 nm excitation wavelength showed broad NIR emission band with the peak centered at 1541 nm (corresponding to 4I13/2→4I15/2 transition) in the range of 1455 to 1620 nm covers the S, C and L bands of optical amplifier. The gain bandwidth of optical amplifier calculated by the product of full width at half maximum and stimulated emission cross section was found to be 511 x 10-28 cm3 that relatively high compared with other Er3+-doped systems, indicated the present CaBaPEr20 glass ability for using as broadband optical amplifier at 1.54 µm. Excitation and emission spectra of the luminescence in visible region were also investigated in this work.