Broadband Near Infrared (NIR) Luminescence Spectra of Bi/Er Co-Doped Silicate Fiber (BEDF) under 830 and 980nm Dual Pumping

AbstractFluoroindate glasses co-doped with Pr3+/Er3+ ions were synthesized and their near-infrared luminescence properties have been examined under selective excitation wavelengths. For the Pr3+/Er3+ co-doped glass samples several radiative and nonradiative relaxation channels and their mechanisms are proposed under direct excitation of Pr3+ and/or Er3+. The energy transfer processes between Pr3+ and Er3+ ions in fluoroindate glasses were identified. In particular, broadband near-infrared luminescence (FWHM = 278 nm) associated to the 1G4 → 3H5 (Pr3+), 1D2 → 1G4 (Pr3+) and 4I13/2 → 4I15/2 (Er3+) transitions of rare earth ions in fluoroindate glass is successfully observed under direct excitation at 483 nm. Near-infrared luminescence spectra and their decays for glass samples co-doped with Pr3+/Er3+ are compared to the experimental results obtained for fluoroindate glasses singly doped with rare earth ions.

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Bi3+ Effects on Down-/up-conversion Luminescence, Temperature Sensing and Optical Transition Properties in Bi3+/Er3+ Co-doped YNbO4 Phosphors

10.21203/rs.3.rs-76690/v1 ◽

2020 ◽

Author(s):

Xin Wang ◽

Xiangping Li ◽

Hongquan Yu ◽

Sai Xu ◽

Jiashi Sun ◽

...

Keyword(s):

Near Infrared ◽

Optical Transition ◽

Green Emission ◽

Radiative Transition ◽

Solid State Reaction Method ◽

Temperature Sensing ◽

Infrared Light ◽

Luminescence Spectra ◽

Experimental Values ◽

Co Doped

Abstract A series of Bi3+ single-doped and Bi3+/Er3+ co-doped YNbO4 phosphors with various concentrations of Bi3+ ions were prepared by a conventional high temperature solid-state reaction method. The results of XRD and Rietveld refinement confirmed that monoclinic phase YNbO4 samples were achieved. The down-/up-conversion luminescence of Er3+ ions were investigated under the excitation of ultraviolet light (327 nm) and near infrared light (980 nm). Under 327 nm excitation, broad visible emission band from Bi3+ ions and characteristic green emission peaks from Er3+ ions were simultaneously observed, while only strong green emissions from Er3+ ions were detected upon excitation of 980 nm. Remarkable emission enhancement was observed in down-/up-conversion luminescence processes by introducing Bi3+ ions into Er3+-doped YNbO4 phosphors. By analyzing the laser working current dependent up-conversion luminescence spectra, two-photon processes were confirmed to be responsible for both the green and the red up-conversion emissions of Er3+ ion. The temperature sensing property of Er3+ was studied by using the temperature dependent up-conversion luminescence spectra and it was found that the temperature sensitivity was sensitive to the doping concentration of Bi3+ ions. By comparing the experimental values of the radiative transition rate ratio of the two green emission levels of Er3+ ions and the theoretical values calculated by Judd-Ofelt (J-O) theory, it was concluded that energy level splitting had significant influences on the temperature sensing property of Er3+ ions.

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Quantum Cutting Downconversion in Tb3+,Yb3+ Codoped Sr3AlO4F Phosphor

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.683.172 ◽

2013 ◽

Vol 683 ◽

pp. 172-175 ◽

Cited By ~ 1

Author(s):

Jia Yue Sun ◽

Yi Ning Sun ◽

Jun Hui Zeng ◽

Ji Cheng Zhu ◽

Hai Yan Du

Keyword(s):

Energy Transfer ◽

High Temperature ◽

Solid State ◽

Quantum Efficiency ◽

Solid State Reaction ◽

Near Infrared ◽

Luminescence Spectra ◽

Promising Candidate ◽

Quantum Cutting ◽

Co Doped

A near Infrared (NIR) quantum cutting (QC) Sr3AlO4F:Tb3+,Yb3+phosphor was synthesized by the conventional high temperature solid-state reaction. The luminescence spectra both in visible (VIS) and NIR regions and decay lifetime curves of Tb3+have been measured to prove energy transfer (ET) from Tb3+to Yb3+. Quantum efficiency (QE) related to Yb3+concentration was calculated and the highest QE was found to be 135% hen Yb3+doped concentration at 20%. The present Tb3+and Yb3+co-doped Sr3AlO4F phosphor may be a promising candidate to modify the spectral of the solar light.

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Electronic and luminescence characteristics of Bi/Al co-doped silica optical fiber

Modern Physics Letters B ◽

10.1142/s0217984919503251 ◽

2019 ◽

Vol 33 (27) ◽

pp. 1950325

Author(s):

Gang Liu ◽

Yanliang Guo ◽

Pengfei Zhu ◽

Baonan Jia ◽

Shanjun Li ◽

...

Keyword(s):

Optical Fiber ◽

Optical Fibers ◽

Near Infrared ◽

Luminescence Center ◽

Al Substitution ◽

Substitution Site ◽

Silica Optical Fiber ◽

Luminescence Characteristics ◽

Nir Luminescence ◽

Co Doped

Electronic and luminescence characteristics of Bi/Al co-doped silica optical fiber model were investigated by using first-principle methods. Our results show that the preference Al substitution site is the adjacent Si site rather than O site. The doping of Al can contribute to the dispersion of Bi[Formula: see text] luminescence center and generate new luminescence center at [Formula: see text]1100 nm by affecting [Formula: see text] orbital of the O atom near Bi atom. Our results give a possible explanation of the near-infrared (NIR) luminescence in Bi/Al co-doped silica optical fibers.

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Fluoroindate Glass Co-Doped with Yb3+/Ho3+ as a 2.85 μm Luminescent Source for MID-IR Sensing

Sensors ◽

10.3390/s21062155 ◽

2021 ◽

Vol 21 (6) ◽

pp. 2155

Author(s):

Marcin Kochanowicz ◽

Jacek Zmojda ◽

Agata Baranowska ◽

Marta Kuwik ◽

Bartłomiej Starzyk ◽

...

Keyword(s):

Energy Transfer ◽

Near Infrared ◽

Luminescence Spectra ◽

Infrared Source ◽

Mid Infrared ◽

Infrared Luminescence ◽

Infrared Spectral Range ◽

Infrared Spectral ◽

Sensing Application ◽

Co Doped

This work reports on the fabrication and analysis of near-infrared and mid-infrared luminescence spectra and their decays in fluoroindate glasses co-doped with Yb3+/Ho3+. The attention has been paid to the analysis of the Yb3+→ Ho3+ energy transfer processed ions in fluoroindate glasses pumped by 976 nm laser diode. The most effective sensitization for 2 μm luminescence has been obtained in glass co-doped with 0.8YbF3/1.6HoF3. Further study in the mid-infrared spectral range (2.85 μm) showed that the maximum emission intensity has been obtained in fluoroindate glass co-doped with 0.1YbF3/1.4HoF3. The obtained efficiency of Yb3+→ Ho3+ energy transfer was calculated to be up to 61% (0.8YbF3/1.6HoF3), which confirms the possibility of obtaining an efficient glass or glass fiber infrared source for a MID-infrared (MID-IR) sensing application.

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A Combined Acquisition and Analysis Protocol to Eliminate Spikes in near Infrared Spectra Measured with Germanium Detectors

Journal of Near Infrared Spectroscopy ◽

10.1255/jnirs.57 ◽

1995 ◽

Vol 3 (2) ◽

pp. 63-71 ◽

Cited By ~ 2

Author(s):

Ueli Oetliker ◽

Christian Reber

Keyword(s):

Near Infrared ◽

Low Cost ◽

Inorganic Materials ◽

Luminescence Spectra ◽

Spectroscopic Techniques ◽

Near Infrared Spectra ◽

Order Of Magnitude ◽

Nir Luminescence ◽

Data Acquisition Process ◽

Analysis Protocol

A new software-based method for eliminating voltage spikes in near infrared (NIR) spectra measured with germanium (Ge) detectors is described. The digitised signal from the detector is analysed statistically in order to reject spikes before the average signal at a given wavelength is calculated and stored. This analysis is an integral part of the data acquisition process and its properties and implementation are described in detail. The protocol is used to measure NIR luminescence spectra of inorganic materials and we show that acquisition times for spectra with equivalent signal-to-noise ratios are shorter by an order of magnitude than for conventional experiments. This low-cost methodology is easily adapted to other spectroscopic techniques involving Ge detectors.

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BAC Photobleaching in Bismuth-Doped and Bismuth/Erbium Co-Doped Optical Fibers

Bismuth - Fundamentals and Optoelectronic Applications ◽

10.5772/intechopen.93414 ◽

2020 ◽

Author(s):

Bowen Zhang ◽

Mingjie Ding ◽

Shuen Wei ◽

Binbin Yan ◽

Gang-Ding Peng ◽

...

Keyword(s):

Optical Fiber ◽

Optical Fibers ◽

High Performance ◽

Near Infrared ◽

Laser Exposure ◽

Active Centers ◽

Irradiation Intensity ◽

Nir Luminescence ◽

Co Doped ◽

Irradiation Wavelength

Bismuth-doped optical fiber (BDF) and bismuth/erbium co-doped optical fiber (BEDF) have attracted much attention due to their ultra-broadband luminescence in the near-infrared (NIR) region. The photobleaching effect on bismuth active centers (BACs) related to the NIR luminescence has been systematically investigated and summarized, in terms of irradiation intensity, irradiation wavelength, and temperature. All these findings not only give the deep insights into the fundamental structure of BACs but also provide an effective way to control the BACs. They play an important role for the development of BDF- and BEDF-based devices with high performance and stability under laser exposure in future.

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NIR Luminescence and Spectroscopic Studies of Nd3+ Doped Lutetium Calcium Silico Borate Glasses

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.728.137 ◽

2017 ◽

Vol 728 ◽

pp. 137-142

Author(s):

Keerati Kirdsiri ◽

Jakrapong Kaewkhao

Keyword(s):

Refractive Index ◽

Optical Absorption ◽

Near Infrared ◽

Spectroscopic Studies ◽

Luminescence Spectra ◽

Borate Glasses ◽

Optical Absorption Spectra ◽

Melt Quenching ◽

Refractive Index Increase ◽

Nir Luminescence

Lutetuim calcium silico borates (LuCaSiB) glasses doped with Nd3+ ions with molar composition of Lu2O3-CaO-SiO2-B2O3-Nd2O3 have been prepared by conventional melt quenching technique. Their properties have been evaluated throughout the density, refractive index, absorption and emission measurements. The density, molar volume and refractive index increase with increasing Nd2O3 concentration. The optical absorption spectra show twelve bands in visible and near infrared regions. The luminescence spectra exhibit three emission bands were observed at 900, 1072 and 1341 nm corresponding to 4F3/2 → 4I9/2, 4I11/2 and 4I13/2 transition respectively.

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Silica coated, aminosilane functionalization, upconversion emission and cytotoxicity in cancer cell lines of the nanoparticles Y2O3 and Gd2O3 co-doped with Yb3+ and Er3+

MRS Proceedings ◽

10.1557/opl.2016.44 ◽

2016 ◽

Vol 1817 ◽

Cited By ~ 1

Author(s):

D. Chávez ◽

K. Juárez-Moreno ◽

G.A. Hirata

Keyword(s):

Cell Lines ◽

Near Infrared ◽

Colorectal Adenocarcinoma ◽

Colorimetric Assay ◽

Sol Gel ◽

Luminescence Spectra ◽

Core Shell ◽

Cervix Carcinoma ◽

Shell Nanoparticles ◽

Co Doped

ABSTRACTY2O3 and Gd2O3 upconversion nanoparticles (UCN) co-doped with Yb3+ and Er3+ can absorb and upconvert near infrared (NIR) radiation into visible light. These UCN find application in bioimaging, as an important tool to diagnose and visualize cancer cells. The UCN can be used as biolabels to identify the cells; the nanoparticles can be coated and functionalized with ligands that bind to receptors on the surface of the cell. In this project, the UCN were synthesized by sol-gel method and subsequently coated with a thin silica shell by using the Stöber method. The core-shell UCN were functionalized with amine group to enable folic acid conjugation. The functionalized core-shell nanoparticles were analyzed by transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), and luminescence measurements. Concentrations of bare and coated/functionalized UCN between 0.001 µg/mL and 1 µg/mL were tested on two different cell lines from human cervix carcinoma (HeLa) and human colorectal adenocarcinoma (DLD-)1 with colorimetric assay based on the MTT reagent (methy-134 thiazolyltetrazolium). The results show good luminescence spectra on all core-shell UCN. The MTT assays show that some concentrations of bare UCN of Y2O3: Er, Yb (1%, 1% mol) and Gd2O3 were cytotoxic for cervical adenocarcinoma cells (HeLa). For human colorectal adenocarcinoma all UCN are non-cytotoxic. The UCN with silica-aminosilane functionalization (APTS/TEOS) were non-cytotoxic on both cell lines.

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