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A WDM Receiver with an Integrated Optical Preamplifier, Aspheric Lens and Grating Filter

J.-M. Verdiell, T. L. Koch, M.G. Young, B. I. Miller, U. Koren, and B. Tell

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Abstract

A photonic integrated circuit implementing a receiver with an optical preamplifier and a wavelength filter for dense WDM systems has been fabricated. The integrated filter is based on planar optics and formed by a waveguide lens and Bragg grating combination. This arrangement provides a narrow filtering response of 0.4 nm and a high sidemode rejection ratio of 20 dB. A monolithically integrated preamplifier and photodetector are also incorporated to allow for high-sensitivity and high-speed operation.

© 1993 Optical Society of America

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