scholarly journals Spectral and Transmittance Properties of Er3+ Doped Zinc Lithium Lead Calcium Borophosphate Glasses

2021 ◽  
Vol 9 (12) ◽  
pp. 636-643
Author(s):  
S. L. Meena
Keyword(s):  
Optical Absorption ◽  
Emission Cross Section ◽  
Branching Ratio ◽  
Life Time ◽  
Stimulated Emission ◽  
Radiative Properties ◽  
Absorption Bands ◽  
Borophosphate Glasses ◽  
Intensity Parameters ◽  
Quenching Method

Abstract: Zinc lithium lead calcium borophosphate glasses containing Er3+ in (40- x):P2O5:10ZnO:10Li2O:10PbO:10CaO:20B2O3:xEr2O3 (where x=1, 1.5,2 mol %) have been prepared by melt-quenching method. The amorphous nature of the glasses was confirmed by x-ray diffraction studies. Optical absorption, Excitation, fluorescence and Transmittance spectra were recorded at room temperature for all glass samples. Judd-Ofelt intensity parameters Ωλ (λ=2, 4, 6) are evaluated from the intensities of various absorption bands of optical absorption spectra. Using these intensity parameters various radiative properties like spontaneous emission probability, branching ratio, radiative life time and stimulated emission cross–section of various emission lines have been evaluated. Keywords: ZLLCBP Glasses, Optical Properties, Judd-OfeltTheory, Transmittance Properties.

Luminescence studies of Eu3+ ions in tellurite glass ceramics

2019 ◽  
Vol 33 (17) ◽  
pp. 1950179
Author(s):  
Tran Thi Hong ◽  
Phan Tien Dung ◽  
Vu Xuan Quang
Keyword(s):  
Thermal Annealing ◽  
Tellurite Glass ◽  
Transition Probabilities ◽  
Emission Cross Section ◽  
Glass Ceramics ◽  
Branching Ratio ◽  
Stimulated Emission ◽  
Radiative Properties ◽  
Thermal Annealing Process ◽  
Quenching Method

The optical properties of Eu[Formula: see text] ions in tellurite glass ceramics with the chemical composition 50TeO2–29B2O3–10ZnO–10Na2O–1Eu2O3-based precursor glasses were presented. These precursor glasses have been prepared by melt quenching method in air, followed by thermal annealing at 550[Formula: see text]C for 12 h, 24 h and 36 h. After thermal annealing process, the micro–crystals appeared in host tellurite glasses. Judd–Ofelt (JO) parameters were calculated from the photoluminescence (PL) spectral measurements. The [Formula: see text], [Formula: see text] and [Formula: see text] parameters have been used to estimate the radiative properties of Eu[Formula: see text] ions in tellurite glass ceramics such as transition probabilities, branching ratio, radiative lifetimes and stimulated emission cross-section. The results of tellurite glass ceramic have been discussed and compared with the similar studies.

scholarly journals OPTICAL ABSORPTION AND STRUCTURAL STUDIES OF Pr3+ DOPED CADMIUM BISMUTH BORATE GLASSES IN VISIBLE AND NEAR INFRARED REGIONS

2013 ◽  
Vol 22 ◽  
pp. 408-415
Author(s):  
INDER PAL ◽  
ASHISH AGARWAL ◽  
SUJATA SANGHI ◽  
SANJAY ◽  
SUNIL BHARDWAJ
Keyword(s):  
Optical Absorption ◽  
Transition Probability ◽  
Emission Cross Section ◽  
Radiative Lifetime ◽  
Branching Ratio ◽  
Glass Network ◽  
Stimulated Emission ◽  
Radiative Properties ◽  
Luminescence Spectra ◽  
Ligand Field

Glasses having composition 20CdOxBi2O3(79.5-x)B2O30.5Pr6O11 with x varying from 15 to 35 mol% have been synthesized. Optical absorption and fluorescence spectra were measured at ambient temperature. A close correlation is observed between the Bi2O3 content and the spectroscopic properties such as Judd-Ofelt intensity parameters Ωλ = (λ = 2, 4, 6) , radiative and structural properties of prepared glasses doped with Pr3+ ion. The variation of Ω2 with Bi2O3 content has been attributed to changes in the asymmetry of the ligand field at the rare earth (RE) ion site (due to structural change) and to changes in RE-O covalency, whereas the variation of Ω6 has been related to the variation in RE-O covalency. Following the luminescence spectra, various radiative properties like transition probability (Arad), radiative lifetime (τr), branching ratio (βr) and stimulated emission cross section (σ) have been calculated. The branching ratio for 3P0 → 3F2 transition of Pr3+ glass system arrive at 41 to 40%, respectively, and the predicted spontaneous radiative transition probability rates are high and varies from 14032 to 14864 s−1. In addition, the glass stability is improved in which the substitution of B2O3 for Bi2O3 strengthens the glass network structure. The bismuth based glass as a host for Pr3+ ion doped suggesting their suitability for laser applications.

PHYSICAL, ABSORPTION AND FLUORESCENCE SPECTRAL STUDIES OF Pr3+ IONS DOPED LITHIUM BISMUTH BORATE GLASSES

2013 ◽  
Vol 22 ◽  
pp. 298-304
Author(s):  
BEENA BHATIA ◽  
VISHAL PARIHAR
Keyword(s):  
Transition Probability ◽  
Emission Cross Section ◽  
Radiative Lifetime ◽  
Branching Ratio ◽  
Emission Spectra ◽  
Radiative Transition ◽  
Stimulated Emission ◽  
Radiative Properties ◽  
Spectral Studies ◽  
Intensity Parameters

Glasses of the system: xB2O3-10Bi2O3-30Li2O-xPr6O11 where x =1, 1.5 and 2 were prepared by melt quenching technique. Optical absorption and emission spectra have been recorded. The intensities of f-f transition are calculated in term of Judd-Ofelt (JO) intensity parameters Ωλ (λ = 2, 4 and 6). Using the fluorescence data and these Ωλ parameters, various radiative properties like transition probability (Arad), branching ratio (βR), radiative lifetime (τR), and stimulated emission cross section (σp), of various emission lines have been evaluated. The branching ratio for 3P0→3H4 transition is 56% and the predicted spontaneous radiative transition probability rates are fairly high 16411 s−1. This is beneficial for lasing emission.

Absorbance and Fluorescence Spectral Analysis of Sm3+ Ions Doped Bismuth Boro-Silicate Glasses

2012 ◽  
Vol 585 ◽  
pp. 279-283 ◽  
Author(s):  
Sunil Bhardwaj ◽  
Rajni Shukla ◽  
Sujata Sanghi ◽  
Ashish Agarwal ◽  
Inder Pal
Keyword(s):  
Transition Probabilities ◽  
Transition Probability ◽  
Branching Ratio ◽  
Life Time ◽  
Radiative Transition ◽  
Stimulated Emission ◽  
Radiative Properties ◽  
Potential Candidate ◽  
Borosilicate Glasses ◽  
Intensity Parameters

Glasses having compositions 20B2O3.(79.5-x)Bi2O3.xSiO2(10 ≤ x ≤ 40) doped with 0.5 mol% of Sm3+ions were prepared by melt quench technique. The amorphous nature of the glasses was confirmed by X-ray diffraction studies. The spectroscopic properties of Sm3+ions in bismuth borosilicate glasses as a function of bismuth oxide were investigated using optical absorption and fluorescence spectra. The Judd-Ofelt theory has been employed to calculate transitions probability from the data of absorption cross-section of several f-f transitions. The intensity parameters Ω2is related to the symmetry of glass hosts, where as the parameter Ω6is inversely proportional to the rare earth oxygen (RE-O) covalency. The variation of Ω4with Bi2O3content has been attributed to rigidity of the samples. Using the Judd Ofelt intensity parameters the other radiative properties like radiative transition probability, radiative life time, branching ratio and the stimulated emission cross-sections of prepared BBSS glasses have been calculated. A bright fluorescent orange emission at 600 nm (4G5/2→6H7/2) of Sm3+ion has been investigated as a function of Bi2O3in host glass. The radiative transition probabilities of Sm3+ions are large in bismuth borosilicate glasses, suggesting the suitability of these glasses as potential candidate for laser application.

scholarly journals SPECTROSCOPIC PROPERTIES OF ERBIUM IONS DOPED IN BISMUTH BORO-SILICATE GLASSES

2013 ◽  
Vol 22 ◽  
pp. 424-430
Author(s):  
SUNIL BHARDWAJ ◽  
RAJNI SHUKLA ◽  
SUJATA SANGHI ◽  
ASHISH AGARWAL ◽  
INDER PAL
Keyword(s):  
Rare Earth ◽  
Emission Cross Section ◽  
Branching Ratio ◽  
Spectroscopic Properties ◽  
Stimulated Emission ◽  
Least Square ◽  
Radiative Properties ◽  
Ligand Field ◽  
Intensity Parameters ◽  
The Rare Earth

Glasses with composition 20B2O3.(79.5-x)Bi2O3.xSiO2 (10 ≤ x ≤ 40) containing 0.5mol% of Er3+ ions were prepared by melt-quench technique. Optical absorption and fluorescence spectra were recorded at room temperature for all glass samples. Based on the Judd-Offelt theory, spectroscopic properties of Er3+ ions are discussed by changing the host glass compositions. The intensity parameters Ω2 , Ω4 , and Ω6 are determined by applying least square analysis method. The variation of Ω2 and Ω6 with Bi2O3 content has been attributed to changes in the asymmetry of the ligand field at the rare earth ion site and to the changes in the rare earth oxygen (RE-O) covalency. The variation of Ω4 with Bi2O3 content has been attributed to rigidity of the samples. Using these intensity parameters various radiative properties like spontaneous emission probability, branching ratio, radiative life time and stimulated emission cross-section of various emission lines have been evaluated. An intense green luminescence bands with maximum around 516 nm and 536 nm are assigned to the 2H11/2→ 4I15/2 and 4S3/2→ 4I15/2 transitions respectively has been obtained.

Fluorescence Properties of Pr3+ Doped Calcium Fluoroborate Glasses

2010 ◽  
Vol 123-125 ◽  
pp. 1235-1238 ◽  
Author(s):  
J. Suresh Kumar ◽  
K. Pavani ◽  
T. Sasikala ◽  
B.C. Jamalaiah ◽  
M. Jayasimhadri ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Emission Cross Section ◽  
Visible Region ◽  
Stimulated Emission ◽  
Oscillator Strengths ◽  
Absorption Bands ◽  
Hypersensitive Transition ◽  
Emission Transition ◽  
Intensity Parameters ◽  
Wave Guides

Calcium fluoroborate glasses doped with trivalent praseodymium ions have been prepared using melt quenching technique with the molar composition (42-x) B2O3 + 20 CaF2 + 15 CaO + 15 BaO + 8 Al2O3 + x PrF3 (x = 0.05, 0.1, 0.5, 1.0, 2.0 and 4.0). Absorption, fluorescence and lifetime spectra were recorded for the title glasses. Judd-Ofelt intensity parameters Ωt (t = 2, 4 and 6) have been determined for the measured oscillator strengths of the absorption bands by including and excluding the 3H4 → 3P2 hypersensitive transition. From the intensity parameters spontaneous emission probabilities (AR), excited state radiative lifetimes (τR) and branching ratios (βR) were calculated. Fluorescence quenching is observed in all the peaks and is explained by energy transfer mechanisms. Using the fluorescence spectra stimulated emission cross section (σe) for all emission transitions have been estimated. Energy transfer processes were also explained to emphasize the quenching of fluorescence intensity of certain emission transition. Based on the results, the utility of Pr3+ doped calcium fluoroborate glasses as laser active materials as well as wave guides in the visible region is discussed.

scholarly journals Judd Ofelt Analysis and Optical Properties of Eu\(^{3 + }\) Doped Tellurite Glasses

2014 ◽  
Vol 24 (3S1) ◽  
pp. 136-142 ◽  
Author(s):  
Tran Thi Hong ◽  
Phan Tien Dung ◽  
Vu Xuan Quang
Keyword(s):  
Vibration Mode ◽  
Transition Probabilities ◽  
Emission Cross Section ◽  
Stimulated Emission ◽  
Radiative Properties ◽  
Photoluminescence Spectra ◽  
Photoluminescence Properties ◽  
Local Vibration ◽  
Side Band ◽  
Omega 6

In this work, the structural characteristic and photoluminescence properties of Eu\(^{3 + }\) doped B\(_{2}\)O\(_{3}\)-TeO\(_{2}\) -ZnO-Na\(_{2}\)O glasses were investigated. These glasses were prepared by a melting method in air, combined with thermal annealing at 350\(^{\circ}\)C, 450\(^{\circ}\)C and 550\(^{\circ}\)C for different duration times. The structural analysis results of these glasses revealed the formation of micro-crystals in the annealed host glass. The photoluminescence spectra of Eu\(^{3 + }\) doped in these samples were observed. The local vibration mode around Eu\(^{3 + }\) ions was investigated by the phonon side-band (PSB) associated with \(^{7}\!F_{0}-^{5}D_{2}\) transition of Eu\(^{3+}\). Judd-Ofelt parameters were then evaluated based on photoluminescence spectra and the luminescence intensity ratios of \(^{5}D_{0} \to ^{7}\!F_{J}\) (\(J=2, 4\) and 6) to \(^{5}D_{0} \to ^{7}\!F_{1}\) transition were predicted. The obtained results were then used to calculate \(\Omega _{2},\;\Omega _{4},\; \Omega _{6} \) parameters based on Judd-Ofelt theory. These \(\Omega _{2}\), \(\Omega _{4}\), \(\Omega _{6}\) parameters allow to derive radiative properties of Eu\(^{3 + }\) ions in glass material such as transition probabilities, radiative lifetimes and peak stimulated emission cross-section for the \(^{5}D_{0} \to ^{7}\!F_{J}\) transitions.

Broadband ~1.5μm Emission of Er3+ in Heavy Metal Germanium Tellurite Glasses for Optical Fiber Amplifier

2011 ◽  
Vol 299-300 ◽  
pp. 538-541
Author(s):  
Xiao Liu ◽  
Quan Shen ◽  
Hai Lin ◽  
Dian Lai Yang
Keyword(s):  
Figure Of Merit ◽  
Emission Cross Section ◽  
Fiber Amplifier ◽  
Optical Amplifier ◽  
Stimulated Emission ◽  
Tellurite Glasses ◽  
Gain Bandwidth ◽  
Optical Fiber Amplifier ◽  
Intensity Parameters ◽  
Ir Emission

In Er3+/Yb3+codoped Na2O-ZnO-PbO-GeO2-TeO2(NZPGT) glasses, effective ~1.5mm infrared (IR) emission was investigated under 980nm excitation. Judd-Ofelt intensity parameters Wt (t = 2, 4, 6) had been calculated to be 6.78´10-20, 1.54´10-20, and 1.17´10-20cm2,respectively. The IR emission full width at half maximum (FWHM) is 73nm, and the maximum stimulated emission cross-section (se) is derived to be 7.53×10-21cm2. A figure of merit (FOM) as the product FWHM´se is adopted to evaluate the gain bandwidth. The comparison of FOM in different glasses indicated that Er3+/Yb3+codoped NZPGT glasses were potential materials in developing broadband optical amplifier.

Optical Analysis of RE3+: Boro-Fluoro-Phosphate Glasses

2010 ◽  
Vol 161 ◽  
pp. 13-41
Author(s):  
B. Sudhakar Reddy ◽  
S. Buddhudu
Keyword(s):  
Absorption Spectra ◽  
Emission Spectra ◽  
Green Emission ◽  
Phosphate Glasses ◽  
Radiative Properties ◽  
Composition Series ◽  
Absorption Bands ◽  
Intensity Parameters ◽  
Doped Glasses ◽  
Nir Emission

We report here on the preparation and optical characterization of certain rare earth (Nd3+,Tb3+,Pr3+ &Tm3+ each in 0.2 mol %) ions doped in two new series glasses in the following composition: Series A: 69.8 B2O3 – 10 P2O5 – 10(ZnO/CdO/TeO2) – 10 AlF3 Series B: 69.8 B2O3 – 10 P2O5 – 10(ZnO/CdO/TeO2) – 10 LiF By applying the Judd-Ofelt intensity parameters of Nd3+: BFP glasses, radiative properties of the emission transitions ( 4F3/2 ®4IJ=9/2, 11/2 &13/2 ) at 906, 1079 and 1349nm have been evaluated. By applying the Judd-Ofelt intensity parameters, radiative properties for Er3+ ions doped glasses, the NIR emission (4I13/2 4I15/2 ) at 1547nm , and also visible green emission (4S3/2 4I15/2 ) at 547nm have been evaluated. Measured absorption spectra of Pr3+: BFP glasses have shown eight absorption bands at 443, 469, 481, 589 , 1008, 1419, 1523 and 1930 nm which correspond to the transitions 3H4 ®3P2, 3P1, 3P0, 1D2, 1G4,3F4, 3F3 and 3F2 respectively. Absorption spectra of Tm3+: glasses have revealed five absorption bands at 466, 685, 790, 1206 and 1644 nm which corresponding to the transitions 3H6®1G4, 3F3, 3H4, 3H5 and 3F4 respectively. Pr3+: glasses, with an excitation at 442nm (3H4 ®3P2), a orange-red emission at 600 nm (1D2® 3H4) has been observed. In the case of Tm3+: glasses, upon excitation with 355nm (3H6®1D2), blue emissions at 452 nm (1D2®3F4) and at 476 nm (1G4®3H6) are observed. From the measured NIR emission spectra of Pr3+: BFP glasses, an NIR emission at 1354nm (1G4®3H5) and form Tm3+: glasses, an NIR emission (3F4®3H6) at 1809 nm are observed with an Ar+ laser (514.5 nm) as the excitation source.

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