Abstract

Heavily Er-doped fibers (EDFs) based on P₂O₅-Al₂O₃-SiO₂ (PAS) ternary glass have been studied. A unique feature of this glass is the formation of a AlPO₄ join having a structure similar to that of SiO₂ glass and a refractive index below it. It is found that the Er³⁺ absorption and emission spectra in the PAS EDFs are defined by the dopant (Al₂O₃ or P₂O₅) present in excess and are close to those of the corresponding binary glass (Al₂O₃-SiO₂ or P₂O₅-SiO₂). The presence of the AlPO₄ join results in the enhancement of the pump-to-signal conversion efficiency in the PAS EDFs as compared with the EDFs based on the P₂O₅-SiO₂ and Al₂O₃-SiO₂ (with 1.5 mol. %Al₂O₃ and less) binary glasses. The PAS host glass is advantageous in the case of large-mode-area active fibers.

© 2009 Optical Society of America

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History
Original Manuscript: July 27, 2009
Manuscript Accepted: September 26, 2009
Revised Manuscript: September 16, 2009
Published: October 27, 2009

References

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Author Affiliations

Mikhail E. Likhachev, Mikhail M. Bubnov, Kirill V. Zotov

Fiber Optics Research Center of RAS

Denis S. Lipatov, Mikhail V. Yashkov, Aleksei N. Guryanov

Institute of Chemistry of High Purity Substances of RAS

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