Guided-wave absorption and fluorescence in epitaxial Er:BaTiO_3 thin film channel waveguides on MgO are reported. Guided- wave absorption is sstrongly dependent on post- growth annealing. Stimulated emission over a 40 nm bandwidth ( lambda _center approx 1.54 um m) has been achieved in oxygen-annealed waveguides. At 1.54 um m the absorption is reduced from approx -2 dB/cm to approx - 1.3 dB/cm in a 2.2 mm long 5 um m wide channel waveguide due the presence of the pump light.
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机译：报道了在MgO上外延的Er：BaTiO_3薄膜通道波导中的导波吸收和荧光。导波吸收主要取决于生长后的退火。在氧退火波导中已经实现了40 nm带宽（λ中心约1.54 um）的受激发射。在1.54 um m处，由于存在泵浦光，在2.2 mm长，5 um m宽的通道波导中，吸收率从大约-2 dB / cm降低到大约-1.3 dB / cm。
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