Optoelectronic neural networks must not only be highly parallel but also fast to compete with electrical systems. Receiver noise becomes an important consideration at high data rates; so the limits set by noise to network size and speed are analyzed. A network incorporating an array of high-speed multi-quantum-well modulators was constructed. It employed a… (More)
In this paper we will discuss a range of applications, pertinent to phase-modulated OFDM superchannels, for which optical signal processing can be used. We demonstrate a novel technique for clock recovery of a 53.5 Gbit/s BPSK superchannel, which uses the well-known four-wave mixing process in a SOA.
We argue that the use of nonlinear semiconductor optical amplifiers for all-optical processing of phase encoded signals offers potential benefits. To illustrate the point, we demonstrate QPSK to 8PSK conversion and decomposition of QPSK to two BPSK outputs at new wavelengths by four-wave mixing.