Silicon photonics have generated an increasing interest in the recent year, mainly for optical
telecommunications or for optical interconnects in microelectronic circuits. The rationale of silicon photonics
is the reduction of the cost of photonic systems through the integration of photonic components and an IC on a common chip, or in the longer term, the enhancement of IC performance with the introduction of optics inside
a high performance chip.
In order to build a Opto-Electronic Integrated circuit (OEIC), a large European project HELIOS has been
launched two years ago. The objective is to combine a photonic layer with a CMOS circuit by different
innovative means, using microelectronics fabrication processes. High performance generic building blocks
that can be used for a broad range of applications are developed such as WDM sources by III-V/Si
heterogeneous integration, fast Si modulators and Ge or InGaAs detectors, Si passive circuits and specific
packaging. Different scenari for integrating photonic with an electronic chip and the recent advances on the
building blocks of the Helios project are presented.
This paper describes the implementation and investigation of an all-optical amplified ring network with Phased Array based optical add/drop multiplexers (OADMs). From crosstalk analysis follows that an OADM with a foldback-structure and 1 X 2-switches has an outstanding crosstalk performance. From the investigation of the dynamic behavior of Erbium doped fiber amplifiers (EDFAs) in a ring configuration we found that EDFAs in a ring-configuration require a faster gain-control when compared to a cascade-configuration.
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