Four-wave-mixing based on ultrafast nonlinear gain dynamics in a semiconductor laser amplifier was applied for wavelength conversion of a 10-channel OFDM signal with a channel spacing of 9 GHz and a modulation rate of 140 Mb/s per channel. Conversion over 275 GHz was realised. BER measurements revealed no severe system degradation due to polarisation fluctuations or cross-talk

Our proposal adds an arrayed waveguide grating (AWG) operated at 1.5 mu m to the star coupler of a passive optical network (PON) in the remote node (RN) and separates the original PON and the overlay via 1.3/1.5 mu m splitters, which guarantees the maintenance function

An all-optical passive WDM high capacity overlay on a passive optical network (PON) is proposed and experimentally verified, using AWGs and direct detection receivers. The unmodified outside fibre plant and the AWG can be supervised from the central office (CO)

No abstract

System performance of an integrated polarization diversity heterodyne receiver optoelectronic IC (OEIC) is reported. The OEIC is monolithically integrated on InP. It includes a tunable 4 section DBR laser (quasi continuous tuning range 3.5 nm) and balanced photodiodes. The packaged OEIC is supplied with a fiber pigtail. Stable and polarization independent operation is achieved without any tendency for a bit error floor. The sensitivity at 1550.2 nm is -33.5 dBm at a bitrate of 140 Mbit/s. The performance of the OEIC based receiver is verified by operating in an experimental OFDM-TV distribution system with 4 channels

New transmissive as well as reflective star couplers are proposed with the property that networks based on these stars can be interconnected without problems. The new star couplers are generated by minor modifications of conventional star couplers. Besides optical amplifiers only one additional special star coupler is necessary. The interconnection scheme allows simple addition of redundancy

No abstract

The all-optical transparent interconnection of two experimental OFDM-LANs is demonstrated. Fiber amplifiers are used to compensate network losses. Each LAN is equipped with four fully engineered, microprocessor- controlled, absolute frequency stabilized subscriber stations. The interconnection is realized utilizing a full duplex star coupler as central node. A proposal to extend the realized network for frequency re-use is given