Digital electronic analysis, synthesis, and manipulation of the full optical field

23.02.2018, 10:00

Dr Peter Winzer, Director, Optical Transmission Subsystems Research, NOKIA Bell Labs, Crawford Hill, USA

Time, place:

Friday, 23 February 2018, 10:00 Seminarroom, A.1.500

Abstract:

Optical communication systems have seen fundamental technological changes over the past 10 years that have completely redefined our ability to analyse, synthesize, and manipulate optical fields across all their physical dimensions: time/frequency, quadrature, polarization, and spatial mode content. State-of-the-art optical capabilities include stable low-linewidth lasers, programmable GHz-resolution optical filters, and spatial light modulators. Electronics capabilities include digital coherent subsystems based on high-speed (up to 100-GHz) analog-to-digital and digital-to-analog converters, and digital electronic signal processors based on Field Programmable Gate Arrays that can handle a Tbit/s of real-time data. These capabilities are about to fundamentally blur the boundaries between optical and electronic signal processing, asking for a combined view on optics and high-speed digital electronics in the analysis, synthesis, and manipulation of the full optical field, and enabling radically new opportunities across a wide range of photonics disciplines. After reviewing modern digital coherent detection and space-division multiplexing using multiple-input-multiple-output (MIMO) processing to scale fiber-optic network capacities, with new levels of physical-layer security as a by-product, we will take a glimpse at the vast possibilities enabled by fully digital light manipulation outside of telecom, from optical coherence tomography to endoscopic imaging to arbitrarily nonlinear and time-variant interferometry to ultra-fast optical tweezers.