The chip enables optical time division multiplexing (OTDM) and could increase the efficiency and capacity of current optical systems by processing communications optically, rather than electrically. By avoiding the usual electrical-optical-electrical conversion in fibre networks, the researchers expect to achieve a hundredfold increase in network speeds. Lead Researcher Vo set up a Tbps network with optical chips installed at the transmitter and receiver. One chip generated a high bit-rate signal at the transmitter, and another successfully received and demultiplexed the data at 1.28 Tbps. The chip is at least five years from being commercially ready.
* Vo expected it to cost no more than $100 per chip to manufacture.
* They believe that efficiency and speed can be increased ten times more
Abstract: We propose chip-based Tbaud processing for all-optical performance monitoring, switching and demultiplexing. We demonstrate the first transmitter optimization and receiver-end demultiplexing of 1.28 Tbit/s OOK signals. Both exploited Kerr nonlinearity in dispersion-engineered As2S3 planar waveguide.
In this paper, we propose a scheme that uses photonic chips to perform all-optical signal processing at the nodes of a Tbit/s network. We implement this scheme by demonstrating all-optical signal monitoring and optimization at the transmitter and ultra-fast switching at the receiver, performed at speeds > 1 Tbit/s using a highly nonlinear dispersion engineered planar chalcogenide (ChG) waveguide. At the Tbaud transmitter, we performed optical performance monitoring (OPM) to measure and (via feedback) mitigate impairments as well as optimize the alignment of the OTDM multiplexing (MUX) stages. The photonic chip OPM offers many advantages, including high sensitivity, multi- impairment monitoring, and > 2 THz operating bandwidth. At the Tbaud receiver, we demonstrated error-free demultiplexing of a 1.28 Tbit/s single wavelength, return-to-zero signal to 10 Gbit/s via the nonlinear process of four-wave mixing (FWM). Excellent performance, including high FWM conversion efficiency and no indication of an error-floor, was achieved. This shows the great potential for Tbaud signal processing in these compact nonlinear ChG waveguides.