Error-free 640 Gbit/s demultiplexing using a chalcogenide planar waveguide chip

Abstract

. These structures combine several desirable features for ultrafast signal processing. In particular, the fast response time associated with the near-instantaneous third order nonlinearity allows flexible ultrafast signal processing in and beyond the telecom C-band. Additionally the high nonlinearity enables compact components with the potential for monolithic integration. Recently, such an As 2 S 3 waveguide chip was used to demultiplex a 160 Gbit/s data signal down to 10 Gbit/s [5]. In this paper we report the first demonstration of errorfree demultiplexing of a 640 Gbit/s data signal in a 5 cm long As 2 S 3 planar waveguide. These results are achieved using a simple four wave mixing (FWM) based scheme. Demultiplexing is performed with only 2 dB penalty, clearly demonstrating the potential of As 2 S 3 waveguide devices for ultra-high-speed signal processing.