Soda-Lime silicate glass has been locally doped with 0.2-at. % erbium by 3.0- and 5.0-MeV ion implantation. Single-mode fiber-compatible optical waveguides were then fabricated by use of Na+ <-> K+ ion exchange. Characteristic photoluminescence (PL) of Er3+ centered at 1.54 mu m is observed on excitation at 1.48 mu m. For low pump intensity the PL decay is nearly single exponential with a lifetime of 7.2 ms. At high intensity it becomes nonexponential as a result of cooperative upconversion, an interaction between excited Er ions. Self-consistent modeling of the PL intensity and decay data yields an upconversion coefficient of 3.2 +/- 0.8 x 10(-24) m(3)/s. The effect of upconversion on optical gain is shown and discussed. An extrapolation of measured optical gain shows that 1 dB/cm of net gain is possible in the present Er-implanted soda-lime glass.
COOPERATIVE UP-CONVERSION IN ERBIUM-IMPLANTED SODA-LIME SILICATE GLASS OPTICAL WAVE-GUIDES
PRIOLO, Francesco
1995-01-01
Abstract
Soda-Lime silicate glass has been locally doped with 0.2-at. % erbium by 3.0- and 5.0-MeV ion implantation. Single-mode fiber-compatible optical waveguides were then fabricated by use of Na+ <-> K+ ion exchange. Characteristic photoluminescence (PL) of Er3+ centered at 1.54 mu m is observed on excitation at 1.48 mu m. For low pump intensity the PL decay is nearly single exponential with a lifetime of 7.2 ms. At high intensity it becomes nonexponential as a result of cooperative upconversion, an interaction between excited Er ions. Self-consistent modeling of the PL intensity and decay data yields an upconversion coefficient of 3.2 +/- 0.8 x 10(-24) m(3)/s. The effect of upconversion on optical gain is shown and discussed. An extrapolation of measured optical gain shows that 1 dB/cm of net gain is possible in the present Er-implanted soda-lime glass.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
