Stopinski, S.T.; Malinowski, M.; Piramidowicz, R.; Kazmierski, C.; Smit, M.K.; Leijtens, X.J.M. Abstract-This study presents the recently developed monolithic photonic-integrated circuits that provide efficient amplitude modulation for wavelength division multiplexed optical channels. The circuits were designed for application as a read-out unit in a highenergy physics experiment, and are sufficiently general to be applied in various types of high-speed photonic transmitters. They were

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... ed using basic building blocks provided in an indium phosphide-based generic integration technology process and fabricated in a multi-project wafer run. Two variants of the circuits, utilizing modulators in Mach-Zehnder and Michelson interferometer configuration, are discussed. A modulation bandwidth of 18.6 GHz was measured and error-free transmission of a 10-Gb/s signal through 85 km of optical fiber was achieved. Index Terms-Electro-optical amplitude modulator (AM), indium phosphide (InP), generic integration technology, Mach-Zehnder interferometer, Michelson interferometer, multi-project wafer (MPW), photonic integrated circuit, wavelength division multiplexing (WDM).