scholarly journals Effect of BaF2 Variation on Spectroscopic Properties of Tm3+ Doped Gallium Tellurite Glasses for Efficient 2.0 μm Laser

2021 ◽  
Vol 8 ◽  
Author(s):  
Jian Yuan ◽  
Weichao Wang ◽  
Yichen Ye ◽  
Tingting Deng ◽  
Deqian Ou ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Tellurite Glass ◽  
Emission Cross Section ◽  
Spectroscopic Properties ◽  
Gain Coefficient ◽  
Relative Energy ◽  
Energy Transfer Mechanism ◽  
Tellurite Glasses ◽  
Laser Development ◽  
The One

The effects of substitution of BaF2 for BaO on physical properties and 1. 8 μm emission have been systematically investigated to improve spectroscopic properties in Tm3+ doped gallium tellurite glasses for efficient 2.0 μm fiber laser. It is found that refractive index and density gradually decrease with increasing BaF2 content from 0 to 9 mol.%, due to the generation of more non-bridging oxygens. Furthermore, OH− absorption coefficient (αOH) reduces monotonically from 3.4 to 2.2 cm−1 and thus emission intensity near 1.8 μm in gallium tellurite glass with 9 mol.% BaF2 is 1.6 times as large as that without BaF2 while the lifetime becomes 1.7 times as long as the one without BaF2. Relative energy transfer mechanism is proposed. The maximum emission cross section and gain coefficient at around 1.8 μm of gallium tellurite glass containing 9 mol.% BaF2 are 8.8 × 10−21 cm2 and 3.3 cm−1, respectively. These results indicate that Tm3+ doped gallium tellurite glasses containing BaF2 appear to be an excellent host material for efficient 2.0 μm fiber laser development.

Luminescence Features of Silver Nanoparticles Sensitized Samarium Doped Boro-Zinc Tellurite Glasses

2016 ◽  
Vol 846 ◽  
pp. 96-101
Author(s):  
Sib Krishna Ghoshal ◽  
Masni Shafie@Haron ◽  
M.R. Sahar
Keyword(s):  
Metallic Nanoparticles ◽  
Tellurite Glass ◽  
Emission Cross Section ◽  
Localized Surface Plasmon ◽  
Spectral Features ◽  
Tellurite Glasses ◽  
Ag Nps ◽  
Co Doping ◽  
Quenching Method ◽  
Average Size

Spectral features modification of rare earth (RE) doped tellurite glasses via controlled manipulation of metallic nanoparticles (NPs) is the current challenge in achieving enhanced lasing action. Triggering the localized surface plasmon resonance (SPR) of NPs in the glass generates tremendous applied interests especially in solid state lasers and nanophotonics. Despite several promising features of RE doped zinc-boro-tellurite glass, the low absorption and emission cross-section of RE ions prohibit them from fabricating efficient lasers. This drawback needed to overcome and significant enhancement of spectral features is required. Co-doping by rare earths and/or embedding metallic NPs (acts as sensitizer) are demonstrated to be the alternative route to surmount such shortcomings. Series of glass samples with composition 74TeO2–15B2O3–10ZnO– 1Sm2O3 – (x)Ag, where 0 ≤ x ≤ 0.1 mol% (in excess) are prepared using melt quenching method and the impacts of silver (Ag) NPs concentrations in altering their photoluminescence properties are inspected. The XRD spectra confirmed the amorphous nature of prepared glasses and the presence of Ag NPs are evidenced in EDX spectra. TEM micrographs revealed the distribution of Ag NPs with average size 7.2 nm. Absorption spectra revealed eight bands which most intense between 6F11/2 and 6F1/2. Photoluminescence spectra exhibited three prominent peaks corresponding to the transition from the excited state 4G5/2 to 6H5/2, 6H7/2, and 6H9/2 states, respectively. Our observation may be useful for the development of tellurite glass based nanophotonic devices.

scholarly journals 2.0 μm Ultra Broadband Emission from Tm3+/Ho3+ Co-Doped Gallium Tellurite Glasses for Broadband Light Sources and Tunable Fiber Lasers

Crystals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 190
Author(s):  
Jian Yuan ◽  
Weichao Wang ◽  
Yichen Ye ◽  
Tingting Deng ◽  
Yizhao Huang ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Fiber Lasers ◽  
Emission Cross Section ◽  
Emission Spectra ◽  
Gain Coefficient ◽  
Light Sources ◽  
Tellurite Glasses ◽  
Broadband Emission ◽  
Forward Energy ◽  
Co Doped

A flat 2.0 μm ultra broadband emission with a full width at half maximum (FWHM) of 329 nm is achieved in 1 mol.% Tm2O3 and 0.05 mol.% Ho2O3 co-doped gallium tellurite glasses upon the excitation of an 808 nm laser diode. The influence of Tm3+ and Ho3+ contents on 2.0 μm spectroscopic properties of gallium tellurite glasses is minutely investigated by absorption spectra, emission spectra, and lifetime measurement. In addition, emission cross section and gain coefficient of Ho3+ ions at 2.0 μm are calculated, and the maximum values reach 8.2 × 10−21 cm2 and 1.54 cm−1, respectively. Moreover, forward and backward energy transfer probability between Tm3+ and Ho3+ ions are qualitatively evaluated by the extended spectral overlap method. Large ratio of the forward energy transfer from Tm3+ to Ho3+ to the backward one (19.7) and high forward energy transfer coefficient (6.22 × 1039 cm6/s) are responsible for effective 2.0 μm emission from Ho3+ ions. These results manifest that Tm3+/Ho3+ co-doped gallium tellurite glass is suitable for potential applications of broadband light sources and tunable fiber lasers operating in eye-safe 2.0 µm spectral region.

scholarly journals Physical and Spectroscopic Properties of Yb3+-Doped Fluorophosphate Laser Glasses

2008 ◽  
Vol 2008 ◽  
pp. 1-6 ◽  
Author(s):  
Shujiang Liu ◽  
Anxian Lu
Keyword(s):  
Power Generation ◽  
Refractive Index ◽  
Cross Section ◽  
Emission Cross Section ◽  
Spectroscopic Properties ◽  
Pump Intensity ◽  
Gain Coefficient ◽  
Mechanical And Thermal Properties ◽  
Fluorophosphate Glass ◽  
Excellent Candidate

The physical properties including refractive index, Abbe number, nonlinear refractive index, microhardness and thermal expansion coefficient, and spectroscopic properties of Yb3+-doped fluorophosphate laser glasses were investigated. The results show that due to the addition of fluoride, mechanical and thermal properties are promoted, emission cross-section σemi is also greatly enhanced. The largest gain coefficient σemi·τm (0.824 pm2·ms) can be obtained with the minimum pump intensity Imin (1.112 kw/cm2). This kind of Yb3+-doped fluorophosphate glass is an excellent candidate material for Yb3+-doped host for high-power generation.

Spectroscopic properties of new Yb3+-doped TeO2–ZnO–Nb2O5 based tellurite glasses with high emission cross-section

2012 ◽  
Vol 34 (9) ◽  
pp. 1549-1552 ◽  
Author(s):  
Cuicui Wang ◽  
Pengfei Wang ◽  
Ruilin Zheng ◽  
Shennuo Xu ◽  
Wei Wei ◽  
...  
Keyword(s):  
Cross Section ◽  
Emission Cross Section ◽  
Spectroscopic Properties ◽  
Tellurite Glasses ◽  
High Emission

scholarly journals Spectroscopic Properties of Yb3+/Nd3+ Co-doped Ions in SiO2-Al2O3-Na2CO3-SrF2-CaF2 Oxyfluoride Glasses for Photonic Applications

2018 ◽  
Vol 10 (1) ◽  
pp. 29 ◽  
Author(s):  
Umamaheswar G ◽  
Devarajulu Gelija ◽  
Ramaswamy V ◽  
Deva Prasad Raju Borelli
Keyword(s):  
Energy Transfer ◽  
Tellurite Glass ◽  
Emission Cross Section ◽  
Spectroscopic Properties ◽  
Ceramic Composites ◽  
Infrared Emission ◽  
Phosphate Glasses ◽  
Stimulated Emission ◽  
Oxyfluoride Glasses ◽  
Co Doped

The Yb3+ and Yb3+/Nd3+ co-doped SiO2-Al2O3-Na2CO3-SrF2-CaF2 oxyfluorosilicate glasses have been prepared by high temperature melt-quenching method. The prepared glasses are excited with 808 nm, and the near infrared emission bands are observed. The intensified emission band was centered at 1030 nm (2F5/2 -> 2F7/2) of Yb3+ ions. Stimulated emission cross-section was evaluated for the prominent 2F5/2 -> 2F7/2 transition of Yb3+ ion by using the Mc-Cumber theory. The energy transfer from Nd3+ to Yb3+ ions in co-doped silicate based oxyfluoride glasses are described under the 514 nm excitation wavelength. Full Text: PDF ReferencesN. Chiodini, A. Paleari, G. Brambilla, E. R. Taylor, "Erbium doped nanostructured tin?silicate glass?ceramic composites", Appl. Phys. Lett. 80, 4449 (2002). CrossRef D. Jaque, J. Capmany, F. Molero, Z. D. Luo, J. G. Sole, "Up-conversion luminescence in the Nd3+:YAB self frequency doubling laser crystal", Opt. mater. 10, 211 (1998). CrossRef H. Lin, G. Meredith, S. Jiang, X. Peng, T. Luo, N. Peyghambarian, E. Yue-Bun Pun, "Optical transitions and visible upconversion in Er3+ doped niobic tellurite glass", J. Appl. Phys. 93, 186 (2003) CrossRef Atul D. Sontakke, K. Annapurna, "Phonon assisted effective non-resonant energy transfer based 1 ?m luminescence from Nd3+?Yb3+ codoped zinc?boro?bismuthate glasses", J. Lumin. 138, 229 (2013). CrossRef F. Liegard, J.L. Doualan, R. Moncorge, M. Bettinelli, "Nd3+ ? Yb3+ energy transfer in a codoped metaphosphate glass as a model for Yb3+ laser operation around 980 nm", Appl. Phys. B 80, 985 (2005) CrossRef A. Miguel, B. Fan, R. Balda, X. Zhang, J. Fernandez, J.L. Adam, "Spectroscopy and energy transfer in Nd3 +/Yb3 + codoped chalcohalide glasses", J. Non-Cryst. Solids 377, 110 (2013). CrossRef G. Devarajulu, B. Deva Prasad Raju, "Effect of concentration variation on 2.0 ?m emission of Ho3+-doped SiO2?Al2O3?Na2CO3?SrF2?CaF2 oxyfluorosilicate glasses", App. Phy. A, 124 (2018). CrossRef Radoslaw Lisiecki, Elzbiecta Augustyn, Witold Ryba-Romanowski, Michal Zelechower, "Er-doped and Er, Yb co-doped oxyfluoride glasses and glass?ceramics, structural and optical properties", Opt. Mater. 33, 1630 (2011). CrossRef G. Chen, Q. Zhang, G. Yang, and Z. Jiang, "Mid-Infrared Emission Characteristic and Energy Transfer of Ho3+-Doped Tellurite Glass Sensitized by Tm3+", J. Fluoresc. 17, 301 (2007). CrossRef D. E. McCumber, "Theory of Phonon-Terminated Optical Masers", Phys. Rev. 134, 299 (1964). CrossRef D.L. Deloach, S.A. Payne, L.K. Smith, W.L. Kway, W. F. Krupke, "Laser and spectroscopic properties of Sr5(PO4)3F:Yb", J. Opt. Soc. Am. B 11, 269 (1994). CrossRef K. Venkata Krishnaiah, R. Rajeswari, K. UpendraKumar, S. Surendra Babu, I.R. Martin, C.K. Jayasankar, "Spectroscopy and radiation trapping of Yb3+ ions in lead phosphate glasses", J.Quant. Spect. Rad. Trans. 140, 37 (2014). CrossRef

Spectroscopic and thermal properties of novel Yb3+-doped TeO2–PbO–NbO2.5 based tellurite glasses with high emission cross-section

2014 ◽  
Vol 28 (25) ◽  
pp. 1450198 ◽  
Author(s):  
She-Bao Lin ◽  
Peng-Fei Wang ◽  
Jiang-Bo She ◽  
Shen-Nuo Xu ◽  
Peng-Fei Zhao ◽  
...  
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Tellurite Glass ◽  
Emission Cross Section ◽  
Gain Coefficient ◽  
Gain Medium ◽  
Fluorescence Decay ◽  
Melt Quenching ◽  
High Emission ◽  
Quenching Method

Series of 70% TeO 2 - x% PbO – (30 - x%) NbO 2.5 (x = 0, 5, and 10 mol.%) glasses doped with Yb 2 O 3 were prepared by the melt-quenching method. Their emission cross-sections, fluorescence lifetimes and gain coefficient were investigated by the absorption spectra and the fluorescence decay curves, respectively. The results show that the glass with 10% PbO possesses the largest emission cross-section of 1.51 pm2, the fluorescence lifetime of 0.68 ms and the gain coefficient of 1.03 ms ⋅ pm 2. These indicate that this tellurite glass may have potential application as Yb 2 O 3 doped gain medium for solid laser.

scholarly journals Temperature-Dependent Stimulated Emission Cross-Section in Nd3+:YLF Crystal

Materials ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 431
Author(s):  
Giorgio Turri ◽  
Scott Webster ◽  
Michael Bass ◽  
Alessandra Toncelli
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Room Temperature ◽  
Radiative Decay ◽  
Emission Cross Section ◽  
Spectroscopic Properties ◽  
Stimulated Emission ◽  
Different Temperatures ◽  
Stimulated Emission Cross Section ◽  
Semi Empirical

Spectroscopic properties of neodymium-doped yttrium lithium fluoride were measured at different temperatures from 35 K to 350 K in specimens with 1 at% Nd3+ concentration. The absorption spectrum was measured at room temperature from 400 to 900 nm. The decay dynamics of the 4F3/2 multiplet was investigated by measuring the fluorescence lifetime as a function of the sample temperature, and the radiative decay time was derived by extrapolation to 0 K. The stimulated-emission cross-sections of the transitions from the 4F3/2 to the 4I9/2, 4I11/2, and 4I13/2 levels were obtained from the fluorescence spectrum measured at different temperatures, using the Aull–Jenssen technique. The results show consistency with most results previously published at room temperature, extending them over a broader range of temperatures. A semi-empirical formula for the magnitude of the stimulated-emission cross-section as a function of temperature in the 250 K to 350 K temperature range, is presented for the most intense transitions to the 4I11/2 and 4I13/2 levels.

Spectroscopic properties of Er3+, Yb3+, Tm3+-codoped tellurite glass

2003 ◽  
Author(s):  
Shixun Dai ◽  
Jianhu Yang ◽  
Shiqing Xu ◽  
Nengli Dai ◽  
Lili Hu ◽  
...  
Keyword(s):  
Tellurite Glass ◽  
Spectroscopic Properties
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