Abstract

The monolithic integration of four $1.5\mathrm{\mu m}$ range AlGaInAs/InP distributed feedback lasers with a $4\times 1$ multimode-interference optical combiner, a curved semiconductor optical amplifier, and an electro-absorption modulator using relatively simple technologies—sidewall grating and quantum well intermixing—has been demonstrated. The four channels span the wavelength range of 1530 to $1566\mathrm{nm}$ with a channel spacing of $12\mathrm{nm}$. The epitaxial structure was designed to produce a far-field pattern as small as $21.2°\times 25.1°$, producing a coupling efficiency with an angled-end single-mode fiber at twice that of a conventional device design.

© 2011 Optical Society of America

Narrow linewidth laterally coupled 1.55 μm AlGaInAs/InP distributed feedback lasers integrated with a curved tapered semiconductor optical amplifier

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