Fabrication and Characterization of Er/Yb Co-Doped Fluorophosphosilicate Glass Core Optical Fibers
Denis S. Lipatov,
Alexey S. Lobanov,
Alexey N. Guryanov,
Andrey A. Umnikov,
Alexey N. Abramov,
Maxim M. Khudyakov,
Mikhail E. Likhachev,
Oleg G. Morozov
Affiliations
Denis S. Lipatov
G.G. Devyatykh Institute of Chemistry of High-Purity Substances, Russian Academy of Sciences, 49 Tropinin St., 603951 Nizhny Novgorod, Russia
Alexey S. Lobanov
G.G. Devyatykh Institute of Chemistry of High-Purity Substances, Russian Academy of Sciences, 49 Tropinin St., 603951 Nizhny Novgorod, Russia
Alexey N. Guryanov
G.G. Devyatykh Institute of Chemistry of High-Purity Substances, Russian Academy of Sciences, 49 Tropinin St., 603951 Nizhny Novgorod, Russia
Andrey A. Umnikov
G.G. Devyatykh Institute of Chemistry of High-Purity Substances, Russian Academy of Sciences, 49 Tropinin St., 603951 Nizhny Novgorod, Russia
Alexey N. Abramov
G.G. Devyatykh Institute of Chemistry of High-Purity Substances, Russian Academy of Sciences, 49 Tropinin St., 603951 Nizhny Novgorod, Russia
Maxim M. Khudyakov
E.M. Dianov Fiber Optics Research Center, Prokhorov General Physics Institute, Russian Academy of Sciences, 38 Vavilov St., 119333 Moscow, Russia
Mikhail E. Likhachev
E.M. Dianov Fiber Optics Research Center, Prokhorov General Physics Institute, Russian Academy of Sciences, 38 Vavilov St., 119333 Moscow, Russia
Oleg G. Morozov
Department of Radiophotonics and Microwave Theory, Kazan National Research State University named after A.N. Tupolev-KAI, 31/7 Karl Marx St., 420111 Kazan, Russia
The technical process of the synthesis of a fluorophosphosilicate (FPS) glass core was thoroughly investigated for the first time utilizing a modified chemical vapor deposition (MCVD) all-gas-phase fabrication method. It was discovered that the limiting doping level of the silica glass simultaneously co-doped with phosphorus (P) and fluorine (F) was found to be confined by the formation of POF3 gas. The dopants content was achieved as high as 4.7 at% of P and 1.1 at% of F in a glass core, respectively. A developed “in-house” manufacturing method makes it possible to fabricate a large mode area (LMA) purely single-mode Er–Yb co-doped optical fibers with a core diameter of 20 μm and with a lasing efficiency comparable to commercially available LMA Er–Yb optical fibers.
