Polarisation-Insensitive Fibre Optic Parametric Amplifiers for Applications in Modern Communication Networks

We evaluate and compare performance of three polarisation-insensitive fibre optic parametric amplifier (PI-FOP A) variants. We employ each variant to amplify a set of $21\mathrm{x}50\ \mathrm{GHz}$ -spaced channels by $12.8\pm 1.5\mathrm{dB}$ and analyse bit-error rate of an amplified 100G PDM-QPSK channel as power per channel is varied. We demonstrate two variants to provide a competitive noise figure of 6 dB. We envisage each of three PI-FOPA variants to be employed for broadband communications, phase-sensitive amplification and extended-reach PON respectively.