title: Multilevel pulse-position modulation for optical power-efficient communication.
abstract: A family of modulation formats is derived by combining pulse-position modulation (PPM) with multilevel dual-polarization signal constellations. With 16-PPM, gains of up to 5.4 dB are obtained over dual-polarization QPSK, at the cost of reduced spectral efficiency.
authors.affiliation: Department of Microtechnology and Nanoscience, Chalmers University of Technology, SE-412 96 Göteborg, Sweden. magnus.karlsson@chalmers.se
authors.forename: Magnus
authors.initials: M
authors.lastname: Karlsson
authors.forename: Erik
authors.initials: E
authors.lastname: Agrell