Raman scattering characteristics of WO3 and P2O5 doped TBSN glasses: a new gain medium for broadband fiber Raman amplifiers

Yasutake Ohishi; Rajan Jose

doi:10.1117/12.685778

2 October 2006 Raman scattering characteristics of WO₃ and P₂O₅ doped TBSN glasses: a new gain medium for broadband fiber Raman amplifiers

Yasutake Ohishi, Rajan Jose

Author Affiliations +

Proceedings Volume 6389, Active and Passive Optical Components for Communications VI; 638906 (2006) https://doi.org/10.1117/12.685778
Event: Optics East 2006, 2006, Boston, Massachusetts, United States

Abstract

We systematically doped WO₃ (up to 10 mol%) and P₂O₅ (up to 16 mol%) in TeO₂-BaO-SrO-Nb₂O₅ (TBSN) glass system and studied thermal and optical properties of the doped glasses. The dependence of the dopant concentration on glass transition (Tg) and crystallization (Tx) temperatures are presented. The TBSN glass doped with greater-than or equal to 4 mol% WO₃ and P₂O₅ showed high stability against crystallization. The dependence of optical band gap energy due to WO3 and P2O5 doping, studied using UV-Vis-NIR absorption spectrometry, is presented. The WO₃ doping shifted the optical band gap to longer wavelength side, whereas P₂O₅ doping shifted that to shorter wavelength side. Structural details of the doped glasses are studied using Raman spectrometry. New Raman bands due to WO₄ and PO₄ tetrahedra are observed in the Raman spectrum of the doped glasses that broadened the Raman spectrum. The Raman gain coefficient and bandwidth of tellurite glasses has been tailored by systematically adding WO₃ and P₂O₅ in a TeO₂-BaO-SrO-Nb₂O₅ glass system. The Raman gain coefficients of the resultant glasses were obtained from spontaneous Raman scattering experiments using a 633 nm laser. The glasses here developed showed the widest gain bandwidth so far achieved in tellurite glasses while maintaining higher gain coefficients. The gain bandwidths of these glasses are more than twice that of a conventional tellurite-based glass and 70% larger than that of the silica glass. Present glasses developed are promising candidates for fiber amplifiers in photonic systems.

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Yasutake Ohishi and Rajan Jose "Raman scattering characteristics of WO₃ and P₂O₅ doped TBSN glasses: a new gain medium for broadband fiber Raman amplifiers", Proc. SPIE 6389, Active and Passive Optical Components for Communications VI, 638906 (2 October 2006); https://doi.org/10.1117/12.685778

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