After setting the standing 100Tb/s world record for the transmission capacity of a single-mode optical fiber deployed in current networks, we are now leading a forward-looking investigation of the transmission-capacity potential of multidimensional optical processing and coded modulation in space division multiplexed (SDM) optical transmission systems, wherein different spatial modes in a single fiber can be used as parallel data channels to increase aggregate transmission capacity. By employing all available degrees of freedom in an SDM system using few mode fiber (FMF), our novel multidimensional processing and coded modulation designs span a multidimensional signal space, featuring in-phase, quadrature, spatial mode and dual polarization coordinates, notably outperforming conventional approaches. We are also investigating advanced SDM optical components, including amplifiers, switches and filters, for efficient parallelized multidimensional signal transmission.
Our world-class achievements in this area include record-breaking 1.05 Petabit/s (1,015 bits per second) SDM transmission over novel multicore fiber with 12 single-mode and two few-mode cores.
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NEC Laboratories America, Inc. (NEC Labs) is the US-based center for NEC Corporation’s global network of corporate research laboratories. Our diverse research groups collaborate with industry, academia and governments to provide disruptive solutions to complex problems. A leader in the integration of IT and network technologies with more than 100 years of expertise, NEC provides a combination of products and solutions that cross-utilize the company’s experience and global resources to meet the complex and ever-changing needs of its customers.