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All-Optical Simultaneous Multilevel Amplitude and Phase Regeneration

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Roethlingshoefer,  Tobias
Quantum Information Processing, Leuchs Division, Max Planck Institute for the Science of Light, Max Planck Society;

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Onishchukov,  Georgy
Russell Division, Max Planck Institute for the Science of Light, Max Planck Society;

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Schmauss,  Bernhard
Schmauß Group, Associated Groups, Max Planck Institute for the Science of Light, Max Planck Society;

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Leuchs,  Gerd
Leuchs Division, Max Planck Institute for the Science of Light, Max Planck Society;

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Citation

Roethlingshoefer, T., Onishchukov, G., Schmauss, B., & Leuchs, G. (2014). All-Optical Simultaneous Multilevel Amplitude and Phase Regeneration. IEEE PHOTONICS TECHNOLOGY LETTERS, 26(6), 556-559. doi:10.1109/LPT.2013.2297171.


Cite as: http://hdl.handle.net/11858/00-001M-0000-002D-662D-2
Abstract
Simultaneous amplitude and phase noise reduction of multiple signal states using a nonlinear amplifying loop mirror with integrated directional phase-sensitive amplifier are presented for the star-eight quadrature amplitude modulation transmission format as an example. The performance of this combined regenerator scheme is compared with that of a cascade of separate phase and amplitude regenerators. It could be shown that an improvement in the error vector magnitude of 4 dB for the high-power states with simultaneous improvement of 5 dB for the low-power states is possible in both cases. Transmission improvement by regeneration is considered for two noise types: 1) amplified spontaneous emission and 2) nonlinear phase noise. Both schemes can either improve the bit error rate by an order of magnitude or enable an increase of the fiber launch power by 3 dB.