49 citations · 128 across the 12 of their papers we have counts for
13 papers
LMMSE-Based Phase Estimator for Fiber-Optic Coherent Spread-Spectrum FBG-Based Sensing Systems
Yiyang Bai, Élie Awwad, Michèle Wigger
Fiber Bragg grating (FBG)-based sensing enables localized strain and temperature monitoring by tracking the phase changes of the light reflected from FBGs inserted along a fiber. A…
Analog-to-digital conversion in the quantum regime
Thomas Pousset, Matteo Schiavon, Guillaume Ricard +3
Digital signal processing has become essential in quantum optics, particularly for continuous-variable (CV) information encoding, enabling coherent detection schemes and mitigation…
Distributed Acoustic Sensing Over Deployed Telecommunication Fiber Networks: Opportunities and Challenges
Élie Awwad, Maria Freire Hermelo, Diane Prato +5
In this paper, we highlight opportunities and challenges of deploying Rayleigh-based distributed optical fiber sensing, also known as distributed acoustic sensing (DAS), over exist…
Comparative Analysis of Spread-Spectrum Codes for Fibre-Optic Distributed Acoustic Sensing
Maria Freire-Hermelo, Elie Awwad
This paper presents a comprehensive performance comparison of several coded sequences for distributed acoustic sensing systems through numerical simulations. Correlation analysis r…
Numerical Model of a Multiple-Input-Multiple-Output Distributed Acoustic Sensing System with Joint Phase and Birefringence Estimation
Diane Prato, Mehran Mokhtari Sheramin, Renaud Gabet +1
In this work, we introduce and experimentally validate a numerical model for a Multiple-Input-Multiple-Output Distributed Acoustic Sensing (MIMO-DAS) system that accounts for dynam…
Sequence Selection with Dispersion-Aware Metric for Long-Haul Transmission Systems
Jingtian Liu, Élie Awwad, Hartmut Hafermann +1
We introduce a novel sign-dependent metric: the energy dispersion index (EDI) of sequences that endured chromatic dispersion, denoted as D-EDI, which exhibits a more accurate oppos…
Multi-dimensional Energy Limitation in Sphere Shaping for Nonlinear Interference Noise Mitigation
Jingtian Liu, Élie Awwad, Yves Jaouën
We propose Four-Dimensional (4D) energy limit enumerative sphere shaping (ESS) of -QAM signaling to minimize rate loss and improve the transmission performance over non-linear W…
Fault-Tolerant Four-Dimensional Constellation for Coherent Optical Transmission Systems
Jingtian Liu, Élie Awwad, Yves Jaouën
We propose a 4-dimensional 2-ary amplitude ring-switched modulation format with 64 symbols, which is denoted as 4D-2A-RS64 encoded over two polarization tributaries to improve the…
Optimal Probing Sequences for Polarization-Multiplexed Coherent Phase OTDR
Christian Dorize, Elie Awwad, Sterenn Guerrier +1
We introduce dual-polarization probing codes based on two circularly shifted frequency sweep signals enabling perfect channel estimation. This is achieved with a probing length equ…
Towards Polarization-Insensitive Coherent Coded Phase OTDR
Sterenn Guerrier, Christian Dorize, Elie Awwad +1
We explore the alternatives for interrogating a fiber sensor from the polarization point of view, and demonstrate a better accuracy with dual polarization probing for coherent phi-…
Introducing Coherent MIMO Sensing, a fading-resilient, polarization-independent approach to phase-OTDR
Sterenn Guerrier, Christian Dorize, Elie Awwad +1
Nowadays, long distance optical fibre transmission systems use polarization diversity multiplexed signals to enhance transmission performance. Distributed acoustic sensors (DAS) us…
High Sensitivity ϕ-OTDR over Long Distance with Polarization Multiplexed Codes
Christian Dorize, Elie Awwad, Jérémie Renaudier
Newly introduced polarization diversity probing codes are suggested to enhance the sensitivity and bandwidth performance of differential phase-sensitive distributed OTDR systems. T…
Enhancing performance of coherent OTDR systems with polarization diversity complementary codes
Christian Dorize, Elie Awwad
Monitoring the optical phase change in a fiber enables a wide range of applications where fast phase variations are induced by acoustic signals or vibrations in general. However, t…