WAVELENGTH DIVISION MULTIPLEX OPTICAL WAVELENGTH CONVERTER

摘要

A WDM optical wavelength converter (70) for converting modulated radiation at a first WDM wavelength channel ( lambda 1) to corresponding modulated radiation at another WDM wavelength channel ( lambda 2) comprises: a semiconductor laser (e.g. a sampled grating distributed Bragg reflector SGDBR device) integrated with a semiconductor optical amplifier (SOA) (72) the converter and is characterised in that the laser (74) is wavelength tuneable over at least a plurality of wavelength channels and preferably all wavelength channels.