All-optical phase-preserving multilevel amplitude regeneration

Röthlingshöfer T, Richter T, Schubert C, Onishchukov G, Schmauß B, Leuchs G (2014)


Publication Language: English

Publication Type: Journal article

Publication year: 2014

Journal

Publisher: Optical Society of America

Book Volume: 22

Pages Range: 27077

Volume: 22

Issue: 22

Journal Issue: 22

DOI: 10.1364/oe.22.027077

Abstract

The possibility of all-optical phase-preserving amplitude regeneration for star-8QAM is demonstrated using a modified nonlinear optical loop mirror. Experiments show a reduction in amplitude noise on both amplitude levels simultaneously, considering two different types of signal distortions: deterministic low-frequency amplitude modulation and broadband amplitude noise. Furthermore, using this amplitude regeneration, the robustness against nonlinear phase noise from fiber nonlinearity in a transmission line is increased. The scheme suppresses the conversion of amplitude noise to nonlinear phase noise. This is shown for simultaneous amplitude regeneration of the two amplitude states as well as for amplitude regeneration of the high-power states only. If the transmission is limited by nonlinear phase noise, single-level operation at the more critical higher-power state will benefit because of the wider plateau region. Numerical simulations confirm the experimental results.

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How to cite

APA:

Röthlingshöfer, T., Richter, T., Schubert, C., Onishchukov, G., Schmauß, B., & Leuchs, G. (2014). All-optical phase-preserving multilevel amplitude regeneration. Optics Express, 22(22), 27077. https://doi.org/10.1364/oe.22.027077

MLA:

Röthlingshöfer, Tobias, et al. "All-optical phase-preserving multilevel amplitude regeneration." Optics Express 22.22 (2014): 27077.

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