We report the realization and performance of a distributed feedback channel waveguide laser in erbium-doped aluminum oxide on a standard thermally oxidized silicon substrate. The diode-pumped continuous-wave laser demonstrated a threshold of $2.2\mathrm{mW}$ absorbed pump power and a maximum output power of more than $3\mathrm{mW}$ with a slope efficiency of 41.3% versus absorbed pump power. Single-longitudinal-mode and single-polarization operation was achieved with an emission linewidth of $1.70\pm 0.58\mathrm{kHz}$ (corresponding to a Q factor of $1.14\times {10}^{11}$ ), which was centered at a wavelength of $1545.2\mathrm{nm}$ .

© 2010 Optical Society of America

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