Abstract
The design, fabrication, spectroscopic characterization, and performance of an
Er:Ta<sub>2</sub>O<sub>5</sub> rib waveguide amplifier is described. Rib waveguides with low loss
(< 0.65 dB/cm at 1600 nm) were obtained. Their absorption spectrum was measured and
McCumber theory was employed to obtain the emission spectrum, leading to the absorption
and emission cross sections. Numerical modeling for gain optimization in
Er:Ta<sub>2</sub>O<sub>5</sub> waveguide amplifiers is presented, employing the experimentally
determined parameters. Finally, net optical gain of 2.1 dB/cm at 1531.5 nm is
demonstrated in a 2.3 cm long Er:Ta<sub>2</sub>O<sub>5</sub> rib waveguide when pumped with 977 nm
laser diode, and compared with simulations to deduce the extent of
upconversion.
© 2012 IEEE
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