Fundamental studies of magneto-optical borogermanate glasses and derived optical fibers containing Tb3+
New magnetic glass compositions, based on system (100-x) (60GeO2 -25B2O3 –4Al2O3 -10Na2O–1PbO) – xTb4O7 were prepared by the melt-quenching technique. The materials were systematically characterized with respect to their structural (XRD, EXAFS, XANES and Raman), thermal (DSC), morphological, optical...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-03-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785421000107 |
| _version_ | 1818609979617181696 |
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| author | Douglas F. Franco Roger G. Fernandes Jorlandio F. Felix Valmor R. Mastelaro Hellmut Eckert Conrado R.M. Afonso Younès Messaddeq Sandra H. Messaddeq Steeve Morency Marcelo Nalin |
| author_facet | Douglas F. Franco Roger G. Fernandes Jorlandio F. Felix Valmor R. Mastelaro Hellmut Eckert Conrado R.M. Afonso Younès Messaddeq Sandra H. Messaddeq Steeve Morency Marcelo Nalin |
| author_sort | Douglas F. Franco |
| collection | DOAJ |
| description | New magnetic glass compositions, based on system (100-x) (60GeO2 -25B2O3 –4Al2O3 -10Na2O–1PbO) – xTb4O7 were prepared by the melt-quenching technique. The materials were systematically characterized with respect to their structural (XRD, EXAFS, XANES and Raman), thermal (DSC), morphological, optical, magnetic and magneto-optical (MO) properties. Morphological and magnetic measurements show the homogeneous distribution of the Tb3+ ions as the magnetic susceptibility increases proportionally to the rare earth content. The optical window covers the range from 0.5 up to 1.6 μm, limited by absorption due to 4f8 -> 4f7 5 d 1and 4f8 -> 4f8 transitions of Tb3+. XANES and EXAFS measurements at the Ge–K edge show that the germanium atoms are always tetrahedrally coordinated, while results at the Tb-LIII edge shows terbium atoms to be eight-coordinated and exclusively present in the oxidation state 3+ independently of the glass composition. MO measurements show that the Verdet constant (VB) increases linearly with the Tb3+ concentration reaching the value of −83.9 rad T−1m−1 at 650 nm for glass containing 8 mol% of Tb4O7. Good thermal stability (ΔT = 200 °C) allowed obtaining an optical fiber of a glass containing 4 mol% of Tb4O7 featuring VB values of −37.9, −23.6 and −5.89 rad T−1 m−1, at 500, 650 and 1550 nm, respectively. |
| first_indexed | 2024-12-16T15:07:09Z |
| format | Article |
| id | doaj.art-bf670be503e644d293e95d9000c610ae |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-12-16T15:07:09Z |
| publishDate | 2021-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-bf670be503e644d293e95d9000c610ae2022-12-21T22:27:06ZengElsevierJournal of Materials Research and Technology2238-78542021-03-0111312327Fundamental studies of magneto-optical borogermanate glasses and derived optical fibers containing Tb3+Douglas F. Franco0Roger G. Fernandes1Jorlandio F. Felix2Valmor R. Mastelaro3Hellmut Eckert4Conrado R.M. Afonso5Younès Messaddeq6Sandra H. Messaddeq7Steeve Morency8Marcelo Nalin9Institute of Chemistry, São Paulo State University — UNESP, 14801-970, Araraquara, SP, Brazil; Corresponding author.Institute of Chemistry, São Paulo State University — UNESP, 14801-970, Araraquara, SP, BrazilInstitute of Physics, Applied Physics Center, University of Brasília, Brasília, DF, 70919-970, BrazilSão Carlos Institute of Physics, São Paulo University USP, 13566-590, São Carlos, SP, BrazilSão Carlos Institute of Physics, São Paulo University USP, 13566-590, São Carlos, SP, BrazilDepartment of Materials Engineering (DEMa), Federal University of São Carlos - UFSCar, 13565-905, São Carlos, SP, BrazilInstitute of Chemistry, São Paulo State University — UNESP, 14801-970, Araraquara, SP, Brazil; Centre d’Optique, Photonique et Laser, Université Laval, Quebec, Quebec, G1V 0A6, CanadaCentre d’Optique, Photonique et Laser, Université Laval, Quebec, Quebec, G1V 0A6, CanadaCentre d’Optique, Photonique et Laser, Université Laval, Quebec, Quebec, G1V 0A6, CanadaInstitute of Chemistry, São Paulo State University — UNESP, 14801-970, Araraquara, SP, Brazil; Corresponding author.New magnetic glass compositions, based on system (100-x) (60GeO2 -25B2O3 –4Al2O3 -10Na2O–1PbO) – xTb4O7 were prepared by the melt-quenching technique. The materials were systematically characterized with respect to their structural (XRD, EXAFS, XANES and Raman), thermal (DSC), morphological, optical, magnetic and magneto-optical (MO) properties. Morphological and magnetic measurements show the homogeneous distribution of the Tb3+ ions as the magnetic susceptibility increases proportionally to the rare earth content. The optical window covers the range from 0.5 up to 1.6 μm, limited by absorption due to 4f8 -> 4f7 5 d 1and 4f8 -> 4f8 transitions of Tb3+. XANES and EXAFS measurements at the Ge–K edge show that the germanium atoms are always tetrahedrally coordinated, while results at the Tb-LIII edge shows terbium atoms to be eight-coordinated and exclusively present in the oxidation state 3+ independently of the glass composition. MO measurements show that the Verdet constant (VB) increases linearly with the Tb3+ concentration reaching the value of −83.9 rad T−1m−1 at 650 nm for glass containing 8 mol% of Tb4O7. Good thermal stability (ΔT = 200 °C) allowed obtaining an optical fiber of a glass containing 4 mol% of Tb4O7 featuring VB values of −37.9, −23.6 and −5.89 rad T−1 m−1, at 500, 650 and 1550 nm, respectively.http://www.sciencedirect.com/science/article/pii/S2238785421000107Magneto-optical glassesVerdet constantFaraday rotationOptical fibers |
| spellingShingle | Douglas F. Franco Roger G. Fernandes Jorlandio F. Felix Valmor R. Mastelaro Hellmut Eckert Conrado R.M. Afonso Younès Messaddeq Sandra H. Messaddeq Steeve Morency Marcelo Nalin Fundamental studies of magneto-optical borogermanate glasses and derived optical fibers containing Tb3+ Journal of Materials Research and Technology Magneto-optical glasses Verdet constant Faraday rotation Optical fibers |
| title | Fundamental studies of magneto-optical borogermanate glasses and derived optical fibers containing Tb3+ |
| title_full | Fundamental studies of magneto-optical borogermanate glasses and derived optical fibers containing Tb3+ |
| title_fullStr | Fundamental studies of magneto-optical borogermanate glasses and derived optical fibers containing Tb3+ |
| title_full_unstemmed | Fundamental studies of magneto-optical borogermanate glasses and derived optical fibers containing Tb3+ |
| title_short | Fundamental studies of magneto-optical borogermanate glasses and derived optical fibers containing Tb3+ |
| title_sort | fundamental studies of magneto optical borogermanate glasses and derived optical fibers containing tb3 |
| topic | Magneto-optical glasses Verdet constant Faraday rotation Optical fibers |
| url | http://www.sciencedirect.com/science/article/pii/S2238785421000107 |
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