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We present a 75km-reach 100Gb/s DWDM transmitter based on a fully passive, hybrid assembly of a 10x10Gb/s laser array with a low-loss SiO2 AWG, and its optimization for thermal management, low cost and high yield.

A network-embedded self-tuning cavity based on a self-seeded RSOA is analysed with particular regards to the impact of some parameters that characterize the transmitter. The cavity is defined by the SOA reflective mirror and a Faraday rotator mirror at the remote node, which allows polarization independent operation with low PDG RSOAs. The majority of the cavity is formed by the distribution fibre, while the arrayed waveguide grating (AWG) at the RN operates as the frequency selective element. The experimental analysis is carried out by varying fundamental cavity parameters such as the distribution fibre length, the cavity losses, the bandwidth of the AWG filter and its spectral location with respect to the RSOA gain peak. Performance is experimentally evaluated at 1.25 Gb/s. Transmitter output power is determined by cavity losses independently of the AWG bandwidth. On the other hand AWG bandwidth strongly influence BER performance: for lower FWHMs error floors appear associated to intensity noise.

Photonic switching is a potential solution for consumption and footprint of electronic processing in ultra high speed telecom equipment. Various technologies of optical integration of active and passive elements will be illustrated

Silicon is increasingly considered as the next future platform for photonic integrated circuits. Low loss Si waveguides and in particular the microring resonator approach seems to be very promising toward the realization of ultra compact, low cost, multi-functionality integrated devices. A novel solution to achieve hit-less tunable add and drop filter on SOI platform is reported on. The device architecture, designed for metro core/access networks, provides full C-band tunability, hit-less tuning operation, polarization independence and very low power consumption.