Parametric amplification and phase preserving amplitude regeneration of a 640 Gbit/s RZ-DPSK signal

Zohreh Lali-Dastjerdi, Michael Galili, Hans Christian Hansen Mulvad, Hao Hu, Leif Katsuo Oxenløwe, Karsten Rottwitt, Christophe Peucheret

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We report the first experimental demonstration of parametric amplification and all-optical phase-preserving amplitude regeneration for a 640 Gbit/s return-to-zero (RZ) differential phase-shift keying (DPSK) optical time division multiplexed (OTDM) signal. In the designed gain-flattened single-pump fiber optical parametric amplifier (FOPA), 620 fs short optical pulses are successfully amplified with 15 dB gain with error-free performance and less than 1 dB power penalty. Phase-preserving amplitude regeneration based on gain saturation in the FOPA is carried out for optical signals with degraded optical signal-to-noise ratio. An improvement of 2.2 dB in receiver sensitivity at a bit-error-ratio of 10−9 has been successfully achieved after regeneration, together with 13.3 dB net gain.
Original languageEnglish
JournalOptics Express
Issue number22
Pages (from-to)25944-25953
Publication statusPublished - 2013

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This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.

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