Title :
Improved gain performance in Yb3+-sensitized Er3+ -doped alumina (Al2O3) channel optical waveguide amplifiers
Author :
Chryssou, C.E. ; Di Pasquale, F. ; Pitt, C.W.
Author_Institution :
Alcatel Submarine Networks, London, UK
fDate :
3/1/2001 12:00:00 AM
Abstract :
Small-signal amplification in short, Yb3+-sensitized, Er3+-doped alumina (Al2O3) channel optical waveguides with high Er3+ concentrations is analyzed. Taking into account uniform up conversion, excited state absorption (ESA) from the Er3+ metastable level (4I13/2 ), and Yb3+→Er3+ energy transfer by cross relaxation, the obtainable gain improvements compared to Yb3+ -free Er3+-doped Al2O3 optical waveguides are investigated. The amplifier model is based on propagation and population rate equations and is solved numerically by combining finite elements and the Runge-Kutta algorithm. The analysis predicts that 5-cm long Yb3+/Er3+ co-doped Al2O 3 waveguides show 13-dB net signal gain for 100 mW pump power at λp=980 nm
Keywords :
Runge-Kutta methods; alumina; erbium; excited states; finite element analysis; metastable states; optical communication equipment; optical pumping; solid lasers; waveguide lasers; 100 mW; 13 dB; 5 cm; 980 nm; Al2O3:Er,Yb; Er3+ metastable level (4I13/2); Runge-Kutta algorithm; Yb3+→Er3+ energy transfer; Yb3+-sensitized Er3+-doped Al2O 3 channel optical waveguide amplifiers; amplifier model; cross relaxation; excited state absorption; finite elements; gain improvements; gain performance; mW pump power; net signal gain; population rate equations; uniform up conversion; Absorption; Energy exchange; Erbium; Metastasis; Optical amplifiers; Optical propagation; Optical pumping; Optical waveguides; Performance gain; Stimulated emission;
Journal_Title :
Lightwave Technology, Journal of
