This page has only limited features, please log in for full access.

Prof. Laeticia Petit
Photonics Laboratory, Tampere University, Korkeakoulunkatu 3, 33720 Tampere, Finland

Basic Info


Research Keywords & Expertise

0 Film
0 Luminescence
0 fibers
0 Glass-based materials for photonics
0 Glass ceramics

Fingerprints

Luminescence
fibers
Film
Glass ceramics

Honors and Awards

The user has no records in this section


Career Timeline

The user has no records in this section.


Short Biography

The user biography is not available.
Following
Followers
Co Authors
The list of users this user is following is empty.
Following: 0 users

Feed

Journal article
Published: 20 July 2021 in Materials
Reads 0
Downloads 0

The influence of the addition of Y2O3 on the structural, spectroscopic, and laser properties of newly prepared Er, Yb-doped strontium-sodium phosphate glass was investigated. While the addition of Y2O3 has a small influence on the absorption spectra and fluorescence lifetime, it has a strong impact on the emission cross-section and on OH content. The glasses were used as the active medium for diode-pumped laser emitting at 1556 nm. The increase in Y2O3 content leads to a significant 35% increase in laser slope efficiency up to 10.4%, but at the expense of the substantial reduction of the wavelength tunability from 82 to 54 nm.

ACS Style

Karel Veselský; Vilma Lahti; Laeticia Petit; Václav Prajzler; Jan Šulc; Helena Jelínková. Influence of Y2O3 Content on Structural, Optical, Spectroscopic, and Laser Properties of Er3+, Yb3+ Co-Doped Phosphate Glasses. Materials 2021, 14, 4041 .

AMA Style

Karel Veselský, Vilma Lahti, Laeticia Petit, Václav Prajzler, Jan Šulc, Helena Jelínková. Influence of Y2O3 Content on Structural, Optical, Spectroscopic, and Laser Properties of Er3+, Yb3+ Co-Doped Phosphate Glasses. Materials. 2021; 14 (14):4041.

Chicago/Turabian Style

Karel Veselský; Vilma Lahti; Laeticia Petit; Václav Prajzler; Jan Šulc; Helena Jelínková. 2021. "Influence of Y2O3 Content on Structural, Optical, Spectroscopic, and Laser Properties of Er3+, Yb3+ Co-Doped Phosphate Glasses." Materials 14, no. 14: 4041.

Journal article
Published: 16 April 2021 in Ceramics
Reads 0
Downloads 0

Even though the (75 NaPO3-25 CaF2) (in mol%) glass can be heat-treated into transparent glass-ceramic with Er3+ doped CaF2 crystals precipitating in the volume of the glass during heat-treatment, this glass was found to be a poor glass former, limiting its use as upconverter under 975 nm pumping. In this study, the impact of the glass composition on the thermal, optical and structural properties of the glass was investigated in order to understand how the glass composition can be tailored for the development of thermally stable upconverter glass-based material. The addition of MgO, Fe2O3 and Al2O3 in the NaPO3-CaF2 glass system increases the thermal stability of glass due to the depolymerization of the glass network. However, the changes in the glass composition also impacted on the nucleation and growth process. Indeed, CaF2 and other crystals were found in the newly developed glasses after heat-treatment leading to glass-ceramics with lower intensity of upconversion than the (75 NaPO3-25 CaF2) glass-ceramic used as a reference. Glasses were also prepared with different concentrations of Er2O3 and ErF3. These glasses were found to be promising as not only are they thermally stable, but they also exhibit green and red emission with high intensity under 975 nm pumping due to Er3+ clustering.

ACS Style

Nirajan Ojha; Iuliia Dmitrieva; Wilfried Blanc; Laeticia Petit. Tailoring the Glass Composition to Increase the Thermal Stability without Impacting the Crystallization Behavior of Oxyfluorophosphate Glass. Ceramics 2021, 4, 148 -159.

AMA Style

Nirajan Ojha, Iuliia Dmitrieva, Wilfried Blanc, Laeticia Petit. Tailoring the Glass Composition to Increase the Thermal Stability without Impacting the Crystallization Behavior of Oxyfluorophosphate Glass. Ceramics. 2021; 4 (2):148-159.

Chicago/Turabian Style

Nirajan Ojha; Iuliia Dmitrieva; Wilfried Blanc; Laeticia Petit. 2021. "Tailoring the Glass Composition to Increase the Thermal Stability without Impacting the Crystallization Behavior of Oxyfluorophosphate Glass." Ceramics 4, no. 2: 148-159.

Journal article
Published: 18 March 2021 in Scripta Materialia
Reads 0
Downloads 0

The preparation of tellurite glasses with persistent luminescence by adding persistent luminescent particles in the glass melt is reported. Compared to phosphate glasses, the afterglow from the tellurite glasses is low, indicating that the tellurite melt is more corrosive on the particles than the phosphate melt. However, as opposed to phosphate glasses, no emission from Eu3+ was detected in the photoluminescence spectra of the glasses when crushed into powder. We show that a confocal Raman microscope can be used to evidence the presence of Eu3+ in the glass-particles interface confirming that some oxidation of Eu2+ actually takes place during the preparation of the tellurite glasses.

ACS Style

M. Hasnat; V. Lahti; H. Byron; M. Lastusaari; L. Petit. Micro-luminescence measurement to evidence decomposition of persistent luminescent particles during the preparation of novel persistent luminescent tellurite glasses. Scripta Materialia 2021, 199, 113864 .

AMA Style

M. Hasnat, V. Lahti, H. Byron, M. Lastusaari, L. Petit. Micro-luminescence measurement to evidence decomposition of persistent luminescent particles during the preparation of novel persistent luminescent tellurite glasses. Scripta Materialia. 2021; 199 ():113864.

Chicago/Turabian Style

M. Hasnat; V. Lahti; H. Byron; M. Lastusaari; L. Petit. 2021. "Micro-luminescence measurement to evidence decomposition of persistent luminescent particles during the preparation of novel persistent luminescent tellurite glasses." Scripta Materialia 199, no. : 113864.

Research article
Published: 24 December 2020 in The Journal of Physical Chemistry C
Reads 0
Downloads 0

Nanosized hydrated YbPO4·nH2O powders were prepared by precipitation from aqueous solutions. It is shown that the structure, optical properties, and size of the raw particles can be further tailored by the subsequent calcination. The raw hydrous crystals transform into the anhydrous YbPO4 xenotime form after calcination at temperatures above 800 °C. In comparison with the hydrous form, the latter is characterized by a well-defined defect-free xenotime structure and multiple sharp peaks in the absorption and emission bands due to the splitting of Yb3+2F7/2 and 2F5/2 manifolds into multiple Stark sublevels as well as by a significant increase in the near-infrared photoluminescence intensity. It is demonstrated that the synthesized YbPO4 phosphors can withstand the corrosive behavior of phosphate glass melts; their reaction with silica glass at temperatures up to 2000 °C is negligible, and thus, YbPO4 particles can be used to prepare translucent glass–crystal composites.

ACS Style

Alexander Veber; Turkka Salminen; Anne Matthes; Robert Mueller; Katrin Wondraczek; Laeticia Petit. Synthesis, Characterization, and Optical Properties of Ytterbium(III) Phosphates and Their Incorporation in Different Glass Matrices. The Journal of Physical Chemistry C 2020, 125, 702 -715.

AMA Style

Alexander Veber, Turkka Salminen, Anne Matthes, Robert Mueller, Katrin Wondraczek, Laeticia Petit. Synthesis, Characterization, and Optical Properties of Ytterbium(III) Phosphates and Their Incorporation in Different Glass Matrices. The Journal of Physical Chemistry C. 2020; 125 (1):702-715.

Chicago/Turabian Style

Alexander Veber; Turkka Salminen; Anne Matthes; Robert Mueller; Katrin Wondraczek; Laeticia Petit. 2020. "Synthesis, Characterization, and Optical Properties of Ytterbium(III) Phosphates and Their Incorporation in Different Glass Matrices." The Journal of Physical Chemistry C 125, no. 1: 702-715.

Review
Published: 31 August 2020 in Materials
Reads 0
Downloads 0

This review focuses on the radiation-induced changes in germanate and tellurite glasses. These glasses have been of great interest due to their remarkable potential for photonics, in terms of extended transmission window in the mid-infrared, ability of rare-earth loading suitable with a laser, and amplification in the near- and mid-infrared or high nonlinear optical properties. Here, we summarize information about possible radiation-induced defects, mechanisms of their formation, and the influence of the glass composition on this process. Special attention is paid to laser-induced structural modification of these glasses, including possible mechanisms of the laser-glass interaction, laser-induced crystallization, and waveguide writing. It is shown that these methods can be used for photostructuring of the glass and have great potential for practical applications.

ACS Style

Mikko Hongisto; Alexander Veber; Yannick Petit; Thierry Cardinal; Sylvain Danto; Veronique Jubera; Laeticia Petit. Radiation-Induced Defects and Effects in Germanate and Tellurite Glasses. Materials 2020, 13, 3846 .

AMA Style

Mikko Hongisto, Alexander Veber, Yannick Petit, Thierry Cardinal, Sylvain Danto, Veronique Jubera, Laeticia Petit. Radiation-Induced Defects and Effects in Germanate and Tellurite Glasses. Materials. 2020; 13 (17):3846.

Chicago/Turabian Style

Mikko Hongisto; Alexander Veber; Yannick Petit; Thierry Cardinal; Sylvain Danto; Veronique Jubera; Laeticia Petit. 2020. "Radiation-Induced Defects and Effects in Germanate and Tellurite Glasses." Materials 13, no. 17: 3846.

Journal article
Published: 16 June 2020 in Journal of Non-Crystalline Solids
Reads 0
Downloads 0

Novel NaYF4:Yb3+, Er3+ nanocrystals containing phosphate glass with composition 83.25NaPO3–9.25NaF-5ZnO-2.5Ag2O (in mol%) was prepared by adding the NaYF4:Yb3+, Er3+ nanocrystals in the glass using the direct doping method. The optical and luminescence properties of this new glass are presented and discussed. The newly developed glass exhibits visible emission under 980 nm pumping with high intensity confirming the presence of the NaYF4:Yb3+, Er3+ nanocrystals in the glass. From the absorption spectrum of the as-prepared glass, it is showed that the as-prepared glasses contains already Ag nanoparticles which are thought to precipitate due to the decomposition of some of the NaYF4:Yb3+, Er3+ nanocrystals occurring during the glass preparation. A heat treatment of the glass was found to lead to the migration of Ag species at the surface of the glass as evidenced using SEM and to a decrease of the intensity of the upconversion mostly due to an increase of the inter defects in the NaYF4:Yb3+, Er3+ nanocrystals due to the heat treatment.

ACS Style

N. Ojha; M. Bogdan; R. Galatus; L. Petit. Effect of heat-treatment on the upconversion of NaYF4:Yb3+, Er3+ nanocrystals containing silver phosphate glass. Journal of Non-Crystalline Solids 2020, 544, 120243 .

AMA Style

N. Ojha, M. Bogdan, R. Galatus, L. Petit. Effect of heat-treatment on the upconversion of NaYF4:Yb3+, Er3+ nanocrystals containing silver phosphate glass. Journal of Non-Crystalline Solids. 2020; 544 ():120243.

Chicago/Turabian Style

N. Ojha; M. Bogdan; R. Galatus; L. Petit. 2020. "Effect of heat-treatment on the upconversion of NaYF4:Yb3+, Er3+ nanocrystals containing silver phosphate glass." Journal of Non-Crystalline Solids 544, no. : 120243.

Special issue article
Published: 24 April 2020 in International Journal of Applied Glass Science
Reads 0
Downloads 0

Bioactive fibers have become increasingly prevalent for applications in optical sensing and as reinforcement in fully biodegradable devices. However, the typical bioactive glass fibers drawn from silicate glasses have poor mechanical properties. Here, we present our latest study on the development of new bioactive single core borophosphate fiber with the composition (in mol%) 47.5P2O5‐20CaO‐20SrO‐10Na2O‐2.5B2O3 and of core‐clad borophosphate fiber, the composition (in mol%) of the clad and the core being 47.5P2O5‐20CaO‐20SrO‐10Na2O‐2.5B2O3 and 0.025CeO2‐0.975(47.5P2O5‐20CaO‐20SrO‐10Na2O‐2.5B2O3), respectively. We show that the immersion in aqueous solutions such as Tris(hydroxymethyl)aminomethane (TRIS) increases first the mechanical properties of the fibers due to the early congruent glass dissolution and so due to the reduction in the density of surface flaws. However, for long immersion in TRIS or immersion in Simulated Body Fluid, the mechanical properties decrease due to the precipitation of a reactive calcium‐phosphate layer at the surface of the fibers. Especially when immersed for a long time in SBF, the fibers become too fragile to allow one to measure their mechanical properties. Nonetheless, we clearly show in this paper that the single core and core‐clad fibers are promising materials for reinforcing composite and/or as biosensors as these fibers still possess sufficiently high mechanical properties after immersion for significant time in SBF and/or TRIS.

ACS Style

Ayush Mishra; Panu Noppari; Catherine Boussard‐Plédel; Laeticia Petit; Jonathan Massera. Changes in the mechanical properties of bioactive borophosphate fiber when immersed in aqueous solutions. International Journal of Applied Glass Science 2020, 11, 622 -631.

AMA Style

Ayush Mishra, Panu Noppari, Catherine Boussard‐Plédel, Laeticia Petit, Jonathan Massera. Changes in the mechanical properties of bioactive borophosphate fiber when immersed in aqueous solutions. International Journal of Applied Glass Science. 2020; 11 (4):622-631.

Chicago/Turabian Style

Ayush Mishra; Panu Noppari; Catherine Boussard‐Plédel; Laeticia Petit; Jonathan Massera. 2020. "Changes in the mechanical properties of bioactive borophosphate fiber when immersed in aqueous solutions." International Journal of Applied Glass Science 11, no. 4: 622-631.

Journal article
Published: 22 January 2020 in Materials
Reads 0
Downloads 0

The impact of the progressive addition of ZnO up to 5 mol% on the thermal, structural, and optical properties of Er3+-doped phosphate glasses within the system NaPO3-NaF-ZnO-Ag2O is discussed. The glass network was found to depolymerize upon the addition of ZnO. This promotes a slight increase in the intensity of the emission at 1.5 µm as well as enhances the silver ions clustering ability under the heat treating. The Ag-nanoparticles formed after moderate heat-treatment can further enhance the emission at 1.5 µm, whereas an excessive amount of the clusters leads to the opposite effect. The addition of ZnO helps to slightly increase the glass ability of the system. The crystallization behavior study revealed that surface crystallization is observed for all the glasses. It is found that even a small ZnO addition changes the crystalline phases formed after devitrification. Moreover, the addition of ZnO decreases the crystallization tendency of the glass.

ACS Style

Luukas Kuusela; Alexander Veber; Nadia G. Boetti; Laeticia Petit. Impact of ZnO Addition on Er3+ Near-Infrared Emission, the Formation of Ag Nanoparticles, and the Crystallization of Sodium Fluorophosphate Glass. Materials 2020, 13, 527 .

AMA Style

Luukas Kuusela, Alexander Veber, Nadia G. Boetti, Laeticia Petit. Impact of ZnO Addition on Er3+ Near-Infrared Emission, the Formation of Ag Nanoparticles, and the Crystallization of Sodium Fluorophosphate Glass. Materials. 2020; 13 (3):527.

Chicago/Turabian Style

Luukas Kuusela; Alexander Veber; Nadia G. Boetti; Laeticia Petit. 2020. "Impact of ZnO Addition on Er3+ Near-Infrared Emission, the Formation of Ag Nanoparticles, and the Crystallization of Sodium Fluorophosphate Glass." Materials 13, no. 3: 527.

Journal article
Published: 15 January 2020 in Ceramics International
Reads 0
Downloads 0

Yb3+ doped oxyfluorophosphate glasses with the composition (98.75) [90NaPO3-(10-x) Na2O-xNaF] - 1.25Yb2O3 (in mol%) with x = 0, 2.5, 5, 7.5 and 10 were prepared using a standard melting process. The progressive replacement of Na2O by NaF leads to an increase in the number of Q2 units at the expense of the Q1 units. This increase in the polymerization of the glass network leads to a shift of the optical band gap to lower wavelength, to a slight increase in the intensity of the emission at 1000 nm and more importantly to a change in the glass crystallization process. Indeed, both surface and bulk crystallization were observed in the glass with x = 0 while surface crystallization only occurs when NaF is added in the phosphate network. The heat treatment leads to the precipitation of at least three crystalline phases: as x increases, the NaPO3 phase grows at the expense of Na5P3O10. All glasses precipitate the Yb containing crystal, NaYbP2O7 which leads to an increase in the intensity of the emission at 1000 nm compared to the emission at 975 nm. We show for the first time to the best of our knowledge that transparent Yb3+ doped phosphate glass-ceramics can be obtained within this glass system when free of NaF.

ACS Style

M. Hongisto; Alexander Veber; N.G. Boetti; S. Danto; V. Jubera; L. Petit. Transparent Yb3+ doped phosphate glass-ceramics. Ceramics International 2020, 46, 1 .

AMA Style

M. Hongisto, Alexander Veber, N.G. Boetti, S. Danto, V. Jubera, L. Petit. Transparent Yb3+ doped phosphate glass-ceramics. Ceramics International. 2020; 46 (16):1.

Chicago/Turabian Style

M. Hongisto; Alexander Veber; N.G. Boetti; S. Danto; V. Jubera; L. Petit. 2020. "Transparent Yb3+ doped phosphate glass-ceramics." Ceramics International 46, no. 16: 1.

Review
Published: 30 November 2019 in Fibers
Reads 0
Downloads 0

For years, scientists have been looking for different techniques to make glasses perfect: fully amorphous and ideally homogeneous. Meanwhile, recent advances in the development of particle-containing glasses (PCG), defined in this paper as glass-ceramics, glasses doped with metallic nanoparticles, and phase-separated glasses show that these “imperfect” glasses can result in better optical materials if particles of desired chemistry, size, and shape are present in the glass. It has been shown that PCGs can be used for the fabrication of nanostructured fibers—a novel class of media for fiber optics. These unique optical fibers are able to outperform their traditional glass counterparts in terms of available emission spectral range, quantum efficiency, non-linear properties, fabricated sensors sensitivity, and other parameters. Being rather special, nanostructured fibers require new, unconventional solutions on the materials used, fabrication, and characterization techniques, limiting the use of these novel materials. This work overviews practical aspects and progress in the fabrication and characterization methods of the particle-containing glasses with particular attention to nanostructured fibers made of these materials. A review of the recent achievements shows that current technologies allow producing high-optical quality PCG-fibers of different types, and the unique optical properties of these nanostructured fibers make them prospective for applications in lasers, optical communications, medicine, lighting, and other areas of science and industry.

ACS Style

Alexander Veber; Zhuorui Lu; Manuel Vermillac; Franck Pigeonneau; Wilfried Blanc; Laeticia Petit. Nano-Structured Optical Fibers Made of Glass-Ceramics, and Phase Separated and Metallic Particle-Containing Glasses. Fibers 2019, 7, 105 .

AMA Style

Alexander Veber, Zhuorui Lu, Manuel Vermillac, Franck Pigeonneau, Wilfried Blanc, Laeticia Petit. Nano-Structured Optical Fibers Made of Glass-Ceramics, and Phase Separated and Metallic Particle-Containing Glasses. Fibers. 2019; 7 (12):105.

Chicago/Turabian Style

Alexander Veber; Zhuorui Lu; Manuel Vermillac; Franck Pigeonneau; Wilfried Blanc; Laeticia Petit. 2019. "Nano-Structured Optical Fibers Made of Glass-Ceramics, and Phase Separated and Metallic Particle-Containing Glasses." Fibers 7, no. 12: 105.

Journal article
Published: 26 October 2019 in Materials
Reads 0
Downloads 0

Glasses with the system (84.60-x) NaPO3-5 ZnO-(9.40-x) NaF-x Ag2O-1 Er2O3, (x = 0, 2, 4, and 6) (mol%) were synthesized by the conventional melt-quenching method. The impact of the addition of Ag2O on the physical, thermal, structural, and optical properties of the glasses is discussed. The Judd-Oflet analysis was used to evaluate the radiative properties of the emission transitions of the glasses. The enhancement of luminescence properties due to Ag2O is discussed in terms of consequent changes in the local electromagnetic field, symmetry, and the ligand field around the Er3+ ion. The heat treatment of the glass was performed in order to precipitate Ag nanoparticles (NPs), which form as a layer at the surface of the heat-treated glasses as confirmed using scanning electron microscopy (SEM). The Ag NPs were found to increase the intensity of the emission at 1.5 µm.

ACS Style

Marwa Ennouri; Luukas Kuusela; Ifa Jlassi; Bernard Gelloz; Laeticia Petit; Habib Elhouichet. Impact of Ag2O Content on the Optical and Spectroscopic Properties of Fluoro-Phosphate Glasses. Materials 2019, 12, 3516 .

AMA Style

Marwa Ennouri, Luukas Kuusela, Ifa Jlassi, Bernard Gelloz, Laeticia Petit, Habib Elhouichet. Impact of Ag2O Content on the Optical and Spectroscopic Properties of Fluoro-Phosphate Glasses. Materials. 2019; 12 (21):3516.

Chicago/Turabian Style

Marwa Ennouri; Luukas Kuusela; Ifa Jlassi; Bernard Gelloz; Laeticia Petit; Habib Elhouichet. 2019. "Impact of Ag2O Content on the Optical and Spectroscopic Properties of Fluoro-Phosphate Glasses." Materials 12, no. 21: 3516.

Special issue articles
Published: 17 October 2019 in International Journal of Applied Glass Science
Reads 0
Downloads 0

Glass and its properties are subject to a variety of changes under the influence of high energy radiation. Therefore, radiation induced defects in glasses requires high attention due to the wide application of glasses in optics on board space craft, in image guides for reactor inspection in optical fiber wave guide and in mobilization of high level radioactive waste. In this paper, we present a mini‐review on radiation effectson phosphate glasses. We review the influence of various irradiation sources on the response of phosphate glasses, focusing on the advances over the past decades.

ACS Style

Laeticia Petit. Radiation effects on phosphate glasses: Review. International Journal of Applied Glass Science 2019, 11, 511 -521.

AMA Style

Laeticia Petit. Radiation effects on phosphate glasses: Review. International Journal of Applied Glass Science. 2019; 11 (3):511-521.

Chicago/Turabian Style

Laeticia Petit. 2019. "Radiation effects on phosphate glasses: Review." International Journal of Applied Glass Science 11, no. 3: 511-521.

Article
Published: 17 May 2019 in Journal of the American Ceramic Society
Reads 0
Downloads 0

The aim of this study was to fabricate a bioactive optical fiber able to monitor “in situ” its reaction with the body through changes in its optical properties. Core and clad preforms were prepared with the composition (97.25*(0.50P2O5‐0.40SrO‐0.10Na2O)‐2.5ZnO‐0.25Er2O3) and (98.25*(0.50P2O5‐0.40SrO‐0.10Na2O)‐1.75ZnO) (in mol%), respectively, and successfully drawn into a multi‐mode core/clad optical fiber. Optical and near‐Infrared images assessed the proper light guiding properties of the fiber. The fibers favor the precipitation of a Ca‐P reactive layer at its surface concomitant with a reduction in the fiber diameter, when immersed in SBF, often assigned as a sign of bioactivity. It is clearly shown here that the bio‐response of the fiber upon immersion in SBF can be tracked from the decrease in the intensity of the Er3+ ions emission at 1.5 µm. This confirms that the newly developed optical fiber, which combines good optical properties with a suitable bioactive behavior, is a promising platform for the development of novel biomedical devices for biophotonic and photomedical applications. Finally, the successful splicing of the newly developed fiber with commercial optical fibers was an evidence of the possibility to integrate the phosphate fiber within existing components used in the field of biomedicine. This article is protected by copyright. All rights reserved.

ACS Style

Pablo Lopez‐Iscoa; Nirajan Ojha; Diego Pugliese; Ayush Mishra; Regina Gumenyuk; Nadia Giovanna Boetti; Davide Janner; Johann Troles; Bruno Bureau; Catherine Boussard‐Plédel; Jonathan Massera; Daniel Milanese; Laeticia Petit. Design, processing, and characterization of an optical core‐bioactive clad phosphate fiber for biomedical applications. Journal of the American Ceramic Society 2019, 102, 6882 -6892.

AMA Style

Pablo Lopez‐Iscoa, Nirajan Ojha, Diego Pugliese, Ayush Mishra, Regina Gumenyuk, Nadia Giovanna Boetti, Davide Janner, Johann Troles, Bruno Bureau, Catherine Boussard‐Plédel, Jonathan Massera, Daniel Milanese, Laeticia Petit. Design, processing, and characterization of an optical core‐bioactive clad phosphate fiber for biomedical applications. Journal of the American Ceramic Society. 2019; 102 (11):6882-6892.

Chicago/Turabian Style

Pablo Lopez‐Iscoa; Nirajan Ojha; Diego Pugliese; Ayush Mishra; Regina Gumenyuk; Nadia Giovanna Boetti; Davide Janner; Johann Troles; Bruno Bureau; Catherine Boussard‐Plédel; Jonathan Massera; Daniel Milanese; Laeticia Petit. 2019. "Design, processing, and characterization of an optical core‐bioactive clad phosphate fiber for biomedical applications." Journal of the American Ceramic Society 102, no. 11: 6882-6892.

Journal article
Published: 15 May 2019 in Journal of Alloys and Compounds
Reads 0
Downloads 0

Er3+ doped phosphate glasses with the composition 75NaPO3-25CaF2 (mol%) were prepared at different melting temperatures to demonstrate the importance to quantify the fluorine content when preparing oxyfluoride glasses. Indeed, increasing the melting temperature from 900 to 1000 °C leads to a small reduction in the fluorine content from 9.4 at % to 8.8 at % as quantified using EPMA. Whereas this loss of fluorine can be suspected from small changes in the thermal properties of the glass, it increases significantly the glass crystallization tendency in this glass system. This means that a heat treatment of the as-prepared glass should be performed when evaporation of fluorine during the glass melting is suspected. Sample preparation for the characterization of the spectroscopic properties of the glasses is discussed here as well; the bulk glasses should be used when measuring the spectroscopic properties of oxyfluoride glasses, which are known to be hygroscopic. It is shown, in this work, that a heat treatment of the glass within the investigated glass system leads to transparent glass-ceramics with volume precipitation of Er3+ doped CaF2 crystals with strong upconversion.

ACS Style

Agata Szczodra; A. Mardoukhi; Mikko Hokka; N.G. Boetti; L. Petit. Fluorine losses in Er3+ oxyfluoride phosphate glasses and glass-ceramics. Journal of Alloys and Compounds 2019, 797, 797 -803.

AMA Style

Agata Szczodra, A. Mardoukhi, Mikko Hokka, N.G. Boetti, L. Petit. Fluorine losses in Er3+ oxyfluoride phosphate glasses and glass-ceramics. Journal of Alloys and Compounds. 2019; 797 ():797-803.

Chicago/Turabian Style

Agata Szczodra; A. Mardoukhi; Mikko Hokka; N.G. Boetti; L. Petit. 2019. "Fluorine losses in Er3+ oxyfluoride phosphate glasses and glass-ceramics." Journal of Alloys and Compounds 797, no. : 797-803.

Journal article
Published: 03 March 2019 in Scripta Materialia
Reads 0
Downloads 0

Strong persistent luminescence (PeL) from silica bodies was obtained, for the first time, by sintering silica powder mixed with PeL SrAl2O4:Eu2+,Dy3+ microparticles (MPs). We show that it is not possible to prepare transparent PeL silica glass due to the decomposition of the MPs, which occurs already at 1450 °C. The MPs decomposition was associated with the precipitation of Sr3Al10SiO20 phase when sintering up to 1650 °C and of SrAl2Si2O8 when sintering between 1650 and 1750 °C. Cristobalite was found to also precipitate when sintering for 10 min but has no impact on the PeL of the bodies.

ACS Style

Nirajan Ojha; Tom Trautvetter; I. Norrbo; A. Kalide; Mika Lastusaari; R. Mueller; L. Petit. Sintered silica bodies with persistent luminescence. Scripta Materialia 2019, 166, 15 -18.

AMA Style

Nirajan Ojha, Tom Trautvetter, I. Norrbo, A. Kalide, Mika Lastusaari, R. Mueller, L. Petit. Sintered silica bodies with persistent luminescence. Scripta Materialia. 2019; 166 ():15-18.

Chicago/Turabian Style

Nirajan Ojha; Tom Trautvetter; I. Norrbo; A. Kalide; Mika Lastusaari; R. Mueller; L. Petit. 2019. "Sintered silica bodies with persistent luminescence." Scripta Materialia 166, no. : 15-18.

Journal article
Published: 13 February 2019 in Journal of Alloys and Compounds
Reads 0
Downloads 0

Persistent luminescence (PeL) was obtained from glasses with the composition (75NaPO3-25CaF2) (in mol%) by adding PeL microparticles SrAl2O4:Eu2+,Dy3+ in the melts using the direct doping method. The glasses exhibit a strong PeL although they crystallize upon quenching. The crystallization was related to the poor thermal stability of the glass, and also to the extensive loss of fluorine during the glass preparation. The use of quartz crucibles and the long process time used to prepare glasses using the direct doping method are responsible for the fluorine losses.

ACS Style

A. Szczodra; L. Kuusela; I. Norrbo; A. Mardoukhi; M. Hokka; M. Lastusaari; L. Petit. Successful preparation of fluorine containing glasses with persistent luminescence using the direct doping method. Journal of Alloys and Compounds 2019, 787, 1260 -1264.

AMA Style

A. Szczodra, L. Kuusela, I. Norrbo, A. Mardoukhi, M. Hokka, M. Lastusaari, L. Petit. Successful preparation of fluorine containing glasses with persistent luminescence using the direct doping method. Journal of Alloys and Compounds. 2019; 787 ():1260-1264.

Chicago/Turabian Style

A. Szczodra; L. Kuusela; I. Norrbo; A. Mardoukhi; M. Hokka; M. Lastusaari; L. Petit. 2019. "Successful preparation of fluorine containing glasses with persistent luminescence using the direct doping method." Journal of Alloys and Compounds 787, no. : 1260-1264.

Journal article
Published: 11 January 2019 in Journal of Non-Crystalline Solids: X
Reads 0
Downloads 0

The impact of Al2O3 and Y2O3 addition on the structure, Yb3+ luminescence and crystallization is investigated for glasses in the P2O5-SrO-Na2O system. Although the addition of Al2O3 and Y2O3 leads to a more connected phosphate network as evidenced using IR and Raman spectroscopies and increases the glass transition temperature, it does not affect strongly the site of the Yb3+. The addition of Al2O3 and Y2O slightly decreases the rate of the glass crystallization. Surface crystallization occurs upon heat treatment. Crystallization was confirmed by the presence of sharp peaks in the XRD patterns of the glasses. Independently of the glass composition, multiple different crystalline phases precipitate in the glasses upon heat treatment. The precipitation of the Na1O7P2Yb1 crystal phase leads to an increase of the excited state 2F5/2 lifetime of Yb3+ and also of the bandwidth of the Yb3+ emission band centered at 1 μm.

ACS Style

R. Sen; N.N.G. Boetti; Mikko Hokka; L. Petit. Optical, structural and luminescence properties of oxyfluoride phosphate glasses and glass-ceramics doped with Yb3+. Journal of Non-Crystalline Solids: X 2019, 1, 100003 .

AMA Style

R. Sen, N.N.G. Boetti, Mikko Hokka, L. Petit. Optical, structural and luminescence properties of oxyfluoride phosphate glasses and glass-ceramics doped with Yb3+. Journal of Non-Crystalline Solids: X. 2019; 1 ():100003.

Chicago/Turabian Style

R. Sen; N.N.G. Boetti; Mikko Hokka; L. Petit. 2019. "Optical, structural and luminescence properties of oxyfluoride phosphate glasses and glass-ceramics doped with Yb3+." Journal of Non-Crystalline Solids: X 1, no. : 100003.

Journal article
Published: 03 January 2019 in Materials
Reads 0
Downloads 0

The effect of the incorporation of Er2O3-doped particles on the structural and luminescence properties of phosphate glasses was investigated. A series of different Er2O3-doped TiO2, ZnO, and ZrO2 microparticles was synthesized using soft chemistry and then added into various phosphate glasses after the melting at a lower temperature than the melting temperature. The compositional, morphological, and structural analyses of the particles-containing glasses were performed using elemental mapping by field emission-scanning electron microscopy (FE-SEM) with energy dispersive x-ray spectrometry (EDS) and x-ray diffraction (XRD). Additionally, the luminescence spectra and the lifetime values were measured to study the influence of the particles incorporation on the spectroscopic properties of the glasses. From the spectroscopic properties of the glasses with the composition 50P2O5-40SrO-10Na2O, a large amount of the Er2O3-doped particles is thought to dissolve during the glass melting. Conversely, the particles were found to survive in glasses with a composition 90NaPO3-(10 − x)Na2O-xNaF (with x = 0 and 10 mol %) due to their lower processing temperature, thus clearly showing that the direct doping method is a promising technique for the development of new active glasses.

ACS Style

Pablo Lopez-Iscoa; Nirajan Ojha; Ujjwal Aryal; Diego Pugliese; Nadia G. Boetti; Daniel Milanese; Laeticia Petit. Spectroscopic Properties of Er3+-Doped Particles-Containing Phosphate Glasses Fabricated Using the Direct Doping Method. Materials 2019, 12, 129 .

AMA Style

Pablo Lopez-Iscoa, Nirajan Ojha, Ujjwal Aryal, Diego Pugliese, Nadia G. Boetti, Daniel Milanese, Laeticia Petit. Spectroscopic Properties of Er3+-Doped Particles-Containing Phosphate Glasses Fabricated Using the Direct Doping Method. Materials. 2019; 12 (1):129.

Chicago/Turabian Style

Pablo Lopez-Iscoa; Nirajan Ojha; Ujjwal Aryal; Diego Pugliese; Nadia G. Boetti; Daniel Milanese; Laeticia Petit. 2019. "Spectroscopic Properties of Er3+-Doped Particles-Containing Phosphate Glasses Fabricated Using the Direct Doping Method." Materials 12, no. 1: 129.

Original article
Published: 19 September 2018 in International Journal of Applied Glass Science
Reads 0
Downloads 0

Our study advances the development of new ternary silicate glasses for use as a designed cladding for semiconductor core optical fibers using molten core draw process. In order to fabricate high‐quality hybrid fibers (homogeneous core shape, low amount of bubbles, low internal stress, no cracking), oxide glasses are the best choice as cladding materials. These glasses should be engineered with tailored thermal properties (coefficient of thermal expansion (CTE) and drawing temperature) so they match those of the semiconductor. Glasses in the system (50SiO2‐(20 − x)Na2O‐(25 + x)B2O3‐5MO) with x = 0 and 10 and MO = ZnO, TiO2, GeO2, Ga2O3, and Al2O3 and in the system 50SiO2‐10Na2O‐(40 − y)B2O3‐yTiO2 with y = 0, 1.25, 2.5, and 5 were investigated. Their thermal properties were measured and discussed with regard to the glass structure analyzed using FTIR spectroscopy. Due to their rigid network, which leads to beneficial thermal properties including low CTE (~5 ppm K−1), the Ge‐containing glass with x = 10 is a promising cladding candidate when preparing a Ge core fiber and the Ga or Zn‐ containing glasses when preparing an InAs core.

ACS Style

Iuliia Dmitrieva; Pablo Lopez-Iscoa; Daniel Milanese; Laeticia Petit. Ternary borosilicates as potential cladding glasses for semiconductor core optical fibers. International Journal of Applied Glass Science 2018, 10, 151 -156.

AMA Style

Iuliia Dmitrieva, Pablo Lopez-Iscoa, Daniel Milanese, Laeticia Petit. Ternary borosilicates as potential cladding glasses for semiconductor core optical fibers. International Journal of Applied Glass Science. 2018; 10 (2):151-156.

Chicago/Turabian Style

Iuliia Dmitrieva; Pablo Lopez-Iscoa; Daniel Milanese; Laeticia Petit. 2018. "Ternary borosilicates as potential cladding glasses for semiconductor core optical fibers." International Journal of Applied Glass Science 10, no. 2: 151-156.

Journal article
Published: 29 June 2018 in Optical Materials Express
Reads 0
Downloads 0

The mid-infrared (mid-IR, 2 to 10 μm) is a technologically important spectral regime for sensing, imaging, and communications. In the past few years, there has been a surge of interest in novel mid-IR optical materials as well as their device implementations to address the increasing demands from these applications. The 22 papers in this feature issue represent a diverse cross-section of the latest technological advances in this field, spanning mid-IR light generation, propagation, manipulation, and detection functions in free-space, fiber, and planar platforms. In terms of material systems, semiconductors, glasses, plasmonic metals, as well as nanostructures specifically engineered for the mid-IR band, are all extensively covered. We hope that the readers will enjoy the kaleidoscopic view of the burgeoning field of mid-IR optics and photonics through this feature issue.

ACS Style

Juejun Hu; Luke Mawst; Steven Moss; Laeticia Petit; David Ting. Feature issue introduction: mid-infrared optical materials and their device applications. Optical Materials Express 2018, 8, 2026 -2034.

AMA Style

Juejun Hu, Luke Mawst, Steven Moss, Laeticia Petit, David Ting. Feature issue introduction: mid-infrared optical materials and their device applications. Optical Materials Express. 2018; 8 (7):2026-2034.

Chicago/Turabian Style

Juejun Hu; Luke Mawst; Steven Moss; Laeticia Petit; David Ting. 2018. "Feature issue introduction: mid-infrared optical materials and their device applications." Optical Materials Express 8, no. 7: 2026-2034.