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Title: Tm3+/Ho3+ co-doped germanate glass and double-clad optical fiber for broadband emission and lasing above 2 μm
Authors: Kochanowicz, Marcin
Zmojda, Jacek
Miluski, Piotr
Baranowska, A.
Leich, M.
Schwuchow, A.
Jäger, M.
Kuwik, M.
Pisarska, Joanna
Pisarski, Wojciech A.
Dorosz, Dominik
Keywords: Broadband emission; Low phonon energy; Glass system
Issue Date: 2019
Citation: "Optical Materials Express" 2019, iss. 3, s. 1450-1458
Abstract: In this paper, a 2 μm broadband emission under 796 nm laser diode excitation in low phonon energy GeO2-Ga2O3-BaO glass system is co-doped with 0.7Tm2O3/(0.07-0.7)Ho2O3 (mol%). The widest emission band (where the Tm3+ → Ho3+ energy transfer efficiency is 63%) was obtained for 0.7Tm2O3/0.15Ho2O3 co-doped glass from which a double-clad optical fiber was realized and investigated. Optimization of Tm3+/Ho3+ concentration enabled the acquisition of broadband amplified spontaneous emission (ASE) in double-clad optical fiber with a full width at half maximum (FWHM): 377 nm and 662 nm for 3 dB and 10 dB bandwidth, respectively. ASE spectrum is a result of the superposition of (Tm3+: 3H4 →Η3F4) 1.45 μm, (Tm3+: 3F4 → 3H6) 1.8 μm and (Ho3+:5I7 → 5I8) 2 μm emission bands. Hence, highly rare-earth co-doped germanate glass is characterized by a remarkably broader ASE spectrum than silica and tellurite fibers showed promising lasing properties for their further application in tunable and dual wavelength lasers.
DOI: 10.1364/OME.9.001450
ISSN: 2159-3930
Appears in Collections:Artykuły (WNŚiT)

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