Parametric amplification and phase preserving amplitude regeneration of a 640 Gbit/s RZ-DPSK signal.
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.
Zohreh
Z
Lali-Dastjerdi
Michael
M
Galili
Hans Christian Hansen
HC
Mulvad
Hao
H
Hu
Leif Katsuo
LK
Oxenløwe
Karsten
K
Rottwitt
Christophe
C
Peucheret