Brillouin-based storage of QPSK signals with fully tunable phase retrieval

authored by: Olivia Saffer, Jesús Humberto Marines Cabello, Steven Becker, Andreas Geilen, Birgit Stiller
Abstract: Photonic memory is an important building block to delay, route, and buffer optical information, for instance, in optical interconnects or for recurrent optical signal processing. Photonic-phononic memory based on stimulated Brillouin-Mandelstam scattering (SBS) has been demonstrated as a coherent optical storage approach with broad bandwidth, frequency selectivity, and intrinsic nonreciprocity. Here, we experimentally demonstrate the storage of quadrature-phase encoded data at room temperature and at cryogenic temperatures. We store and retrieve the 2-bit states {00, 01, 10, 11} encoded as optical pulses with the phases { 0 , π/2 , π , 3π/2 } —a quadrature phase shift keying signal. The 2-bit signals are retrieved from the acoustic domain with a global phase rotation of π, which is inherent in the process due to SBS. We also demonstrate full phase control over the retrieved data based on two different handles: by detuning slightly from the SBS resonance or by changing the storage time in the memory scheme, we can cover the full range [0, 2π). At a cryogenic temperature of 3.9 K, we have increased readout efficiency as well as gained access to longer storage times, which results in a detectable signal at 140 ns. All in all, the work sets the cornerstone for optoacoustic memory schemes with phase-encoded data.
Organisation(s): Institute of Photonics
External Organisation(s): Max Planck Institute for the Science of Light
Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU Erlangen-Nürnberg)
Type: Article
Journal: APL Photonics
Volume: 10
ISSN: 2378-0967
Publication date: 06.2025
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Atomic and Molecular Physics, and Optics, Computer Networks and Communications
Electronic version(s): https://doi.org/10.1063/5.0241508 (Access: Open)
https://doi.org/10.48550/arXiv.2410.05156 (Access: Open)
: Details in the research portal "Research@Leibniz University"

BibTeX

@article{72c90263c77645e39428642a8604e01a,
title = "Brillouin-based storage of QPSK signals with fully tunable phase retrieval",
abstract = "Photonic memory is an important building block to delay, route, and buffer optical information, for instance, in optical interconnects or for recurrent optical signal processing. Photonic-phononic memory based on stimulated Brillouin-Mandelstam scattering (SBS) has been demonstrated as a coherent optical storage approach with broad bandwidth, frequency selectivity, and intrinsic nonreciprocity. Here, we experimentally demonstrate the storage of quadrature-phase encoded data at room temperature and at cryogenic temperatures. We store and retrieve the 2-bit states {00, 01, 10, 11} encoded as optical pulses with the phases { 0 , π/2 , π , 3π/2 } —a quadrature phase shift keying signal. The 2-bit signals are retrieved from the acoustic domain with a global phase rotation of π, which is inherent in the process due to SBS. We also demonstrate full phase control over the retrieved data based on two different handles: by detuning slightly from the SBS resonance or by changing the storage time in the memory scheme, we can cover the full range [0, 2π). At a cryogenic temperature of 3.9 K, we have increased readout efficiency as well as gained access to longer storage times, which results in a detectable signal at 140 ns. All in all, the work sets the cornerstone for optoacoustic memory schemes with phase-encoded data.",
author = "Olivia Saffer and {Marines Cabello}, {Jes{\'u}s Humberto} and Steven Becker and Andreas Geilen and Birgit Stiller",
note = "Publisher Copyright: {\textcopyright} 2025 Author(s).",
year = "2025",
month = jun,
doi = "10.1063/5.0241508",
language = "English",
volume = "10",
journal = "APL Photonics",
issn = "2378-0967",
publisher = "AIP Publishing LLC",
number = "6",
}

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