M. Federighi et F. Dipasquale, THE EFFECT OF PAIR-INDUCED ENERGY-TRANSFER ON THE PERFORMANCE OF SILICA WAVE-GUIDE AMPLIFIERS WITH HIGH ER3+ YB3+ CONCENTRATIONS/, IEEE photonics technology letters, 7(3), 1995, pp. 303-305
High-concentration Er3+/Yb3+ co-doped silica waveguide amplifiers are
numerically analyzed, With optimized rare-earth concentrations the eff
ect of Er3+/Er3+ ion-pairs can be neglected and each Er3+ ion be assum
ed to be paired only to the surrounding Yb3+ ions, The rate-equations
model includes uniform upconversion mechanisms from I-4(13/2) and I-4(
11/2) erbium levels and an Yb3+ to Er3+ pair-induced energy transfer p
rocess. Numerical results demonstrate the possibility of fabricating s
hort- and high-gain integrated optical amplifiers; it is shown that ne
t gain as high as 3 dB/cm can be obtained.