Gain properties and optical-feedback suppression of asymmetrical curved active waveguides

Abstract

Elaborately-designed asymmetrical curved active waveguides are introduced to improve the gain properties of semiconductor optical amplifiers (SOAs) by internal distributed optical-feedback suppression. An analytical model of the double-energy-level system is utilized in the simulation and designed by the finite difference time domain (FDTD) method. Under a 280 mA driving current, the optimized curved SOA with the simple device structure without isolators performs a more than 18 dB fiber-to-fiber gain, 980 mW spontaneous emission power, and 13 dBm saturation power.

Keywords

curved active waveguide / feedback restrain / semiconductor optical amplifier (SOA)

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant No. 60377012).

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2014 Higher Education Press and Springer-Verlag Berlin Heidelberg