This paper summarizes the goals and first results of the EU-funded project DYNAMOS, which develops fast (1 ns) and widely tunable (>110 nm) lasers, energy-efficient (~ fJ/bit), broadband (100 GHz) electro-optic modulators, and high-speed (1 ns) broadcast-and-select packet switches as photonic integrated circuits. These components are used to demonstrate novel data centre networks with highly deterministic sub-microsecond latency to enable maximum congestion reduction, full bisection bandwidth and guaranteed quality of service while reducing cost per Gbps. The methods to achieve the goals are first described. Then the first results from optical amplifiers, modulators, and lasers are reported with the main focus on lasers that can be tuned fast over a wide wavelength range.
Emerging passive optical networks (PONs) standards target 25Gb/s and 50Gb/s systems, requiring high optical powers without amplification. Externally modulated lasers (EMLs) yield low chirp. However, achieving output modulated power exceeding 10 dBm is challenging due to modulator insertion losses and saturation.
In this invited presentation we will show our recent results in the development of EMLs based on semi-insulating buried heterostructure (SIBH) waveguide. We will present the main EML design rules and compromises, then apply them to different EMLs aiming at major telecom and datacom applications, with special focus on novel devices addressing the needs of emerging PON applications.
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