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Improved gain performance in Yb3+-sensitized Er3+ -doped alumina (Al2O3) channel optical waveguide amplifiers

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3 Author(s)
Chryssou, C.E. ; Alcatel Submarine Networks, London, UK ; Di Pasquale, F. ; Pitt, C.W.

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

Published in:

Lightwave Technology, Journal of  (Volume:19 ,  Issue: 3 )

Date of Publication:

Mar 2001

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