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Journal Article

Multilevel Phase-Preserving Amplitude Regeneration Using a Single Nonlinear Amplifying Loop Mirror

MPS-Authors
/persons/resource/persons201167

Roethlingshoefer,  Tobias
Optical Communication, Leuchs Division, Max Planck Institute for the Science of Light, Max Planck Society;

/persons/resource/persons201144

Onishchukov,  Georgy
Optical Communication, Leuchs Division, Max Planck Institute for the Science of Light, Max Planck Society;

/persons/resource/persons201180

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

/persons/resource/persons201115

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

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Citation

Hierold, M., Roethlingshoefer, T., Sponsel, K., Onishchukov, G., Schmauss, B., & Leuchs, G. (2011). Multilevel Phase-Preserving Amplitude Regeneration Using a Single Nonlinear Amplifying Loop Mirror. IEEE PHOTONICS TECHNOLOGY LETTERS, 23(14), 1007-1009. doi:10.1109/LPT.2011.2149510.


Cite as: https://hdl.handle.net/11858/00-001M-0000-002D-69BF-2
Abstract
A possibility of multilevel phase-preserving amplitude regeneration using a nonlinear amplifying loop mirror (NALM) is presented for the optical star-8 quadrature amplitude modulation (QAM) transmission format as an example. Two significantly different state power ratios for the QAM signal, 1:3 and 1:7, were investigated. After the optimization of the coupler splitting ratio and the directional phase bias in the NALM, amplitude noise can be efficiently suppressed at both signal power levels simultaneously. Bit-error-ratio (BER) simulations have shown that in a system limited by nonlinear phase noise, the deployment of the NALM allows an increase of the fiber launch power by 1.9 and 2.2 dB at a BER of 10(-3) for a state power ratio of 1:3 and 1:7, respectively. The regeneration limits due to imperfections of the power transfer characteristic are also discussed.