title: Mode coupling at connectors in mode-division multiplexed transmission over few-mode fiber.
abstract: In mode-division multiplexed (MDM) transmission systems, mode coupling is responsible for inter-modal crosstalk. We consider the transmission of modulated signals over a few-mode fiber (FMF) having low mode coupling and large differential mode group delay in the presence of a non-ideal fiber connection responsible for extra mode coupling. In this context, we first analytically derive the coupling matrix of the multimode connector and we numerically study the dependence of the matrix coefficients as a function of the butt-joint connection characteristics. The numerical results are then validated through an experiment with a five-mode setup. Finally, through numerical simulations, we assess the impact of the connector on the signal quality investigating different receiver digital signal processing (DSP) schemes.
authors.forename: Jordi
authors.initials: J
authors.lastname: Vuong
authors.forename: Petros
authors.initials: P
authors.lastname: Ramantanis
authors.forename: Yann
authors.initials: Y
authors.lastname: Frignac
authors.forename: Massimiliano
authors.initials: M
authors.lastname: Salsi
authors.forename: Philippe
authors.initials: P
authors.lastname: Genevaux
authors.forename: Djalal F
authors.initials: DF
authors.lastname: Bendimerad
authors.forename: Gabriel
authors.initials: G
authors.lastname: Charlet