Roland Ryf
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View article: Reaching the pinnacle of high-capacity optical transmission using a standard cladding diameter coupled-core multi-core fiber
Reaching the pinnacle of high-capacity optical transmission using a standard cladding diameter coupled-core multi-core fiber Open
View article: Mode Selective Distributed Characterization of Few-Mode Fibers
Mode Selective Distributed Characterization of Few-Mode Fibers Open
View article: Experimental Characterization of SDM Optical Fibers
Experimental Characterization of SDM Optical Fibers Open
Modal dispersion characterization of optical fibers for space division multiplexing is reviewed. Experimental results collected on a field deployed multicore fiber cable are presented and compared with the theoretical model. Moreover, a no…
View article: Global Seismic Monitoring using Operational Subsea Cable
Global Seismic Monitoring using Operational Subsea Cable Open
We report tele-seismic waves detection from multiple earthquakes on an operational subsea cable from Iceland to Ireland. Using per-span laser interferometry with 100km spacing, we report clear detection of S-, P- and surface waves from mul…
View article: Large Language Model-Driven Cross-Domain Orchestration Using Multi-Agent Workflow
Large Language Model-Driven Cross-Domain Orchestration Using Multi-Agent Workflow Open
We showcase an application that leverages multiple agents, powered by large language models and integrated tools, to collaboratively solve complex network operation tasks across various domains. The tasks include real-time topology retriev…
View article: Enhancing Long-Haul 15-Mode Fiber Performance: Mode Permutation for Reduced Modal Dispersion
Enhancing Long-Haul 15-Mode Fiber Performance: Mode Permutation for Reduced Modal Dispersion Open
We explore the efficacy of mode permutation to mitigate the impact of modal dispersion in a 15-mode fiber link for long-haul space-division multiplexed transmission. By introducing strong coupling between all the fiber modes, mode permutat…
View article: IEEE Journal of Quantum Electronics publication information
IEEE Journal of Quantum Electronics publication information Open
View article: Net 835-Gb/s/λ Carrier- and LO-Free 100-km Transmission Using Channel-Aware Phase Retrieval Reception
Net 835-Gb/s/λ Carrier- and LO-Free 100-km Transmission Using Channel-Aware Phase Retrieval Reception Open
We experimentally demonstrate the first carrier- and LO-free 800G/λ receiver enabling direct compatibility with standard coherent transmitters via phase retrieval, achieving net 835-Gb/s transmission over 100-km SMF and record 8.27-b/s/Hz …
View article: IEEE Photonics Technology Letters publication information
IEEE Photonics Technology Letters publication information Open
View article: IEEE Photonics Technology Letters publication information
IEEE Photonics Technology Letters publication information Open
View article: IEEE Photonics Technology Letters publication information
IEEE Photonics Technology Letters publication information Open
View article: IEEE Photonics Technology Letters publication information
IEEE Photonics Technology Letters publication information Open
View article: IEEE Photonics Technology Letters publication information
IEEE Photonics Technology Letters publication information Open
View article: IEEE Photonics Technology Letters publication information
IEEE Photonics Technology Letters publication information Open
View article: Statistical Analysis of Modal Dispersion in Field-Installed Coupled-Core Fiber Link
Statistical Analysis of Modal Dispersion in Field-Installed Coupled-Core Fiber Link Open
This article presents a statistical analysis of modal dispersion of a 69-km-long field-deployed coupled-core four-core fiber link. The link is characterized over a band of approximately 5 THz at 1550 nm, in terms of complex modal dispersio…
View article: IEEE Journal of Quantum Electronics publication information
IEEE Journal of Quantum Electronics publication information Open
View article: IEEE Photonics Technology Letters publication information
IEEE Photonics Technology Letters publication information Open
View article: IEEE Photonics Technology Letters publication information
IEEE Photonics Technology Letters publication information Open
View article: IEEE Photonics Technology Letters publication information
IEEE Photonics Technology Letters publication information Open
View article: IEEE Photonics Technology Letters publication information
IEEE Photonics Technology Letters publication information Open
View article: IEEE Journal of Quantum Electronics publication information
IEEE Journal of Quantum Electronics publication information Open
View article: Digital Signal Processing for MDG Estimation in Long-Haul SDM Transmission
Digital Signal Processing for MDG Estimation in Long-Haul SDM Transmission Open
In SDM transmission, mode-dependent gain (MDG) can be estimated by digital signal processing (DSP) from the transfer matrix of the multiple-input multiple-output (MIMO) equalizer. However, previous works have shown that the estimation perf…
View article: IEEE Photonics Technology Letters publication information
IEEE Photonics Technology Letters publication information Open
View article: Distortion-Aware Phase Retrieval Receiver for High-Order QAM Transmission with Carrierless Intensity-Only Measurements
Distortion-Aware Phase Retrieval Receiver for High-Order QAM Transmission with Carrierless Intensity-Only Measurements Open
We experimentally investigate transmitting high-order quadrature amplitude modulation (QAM) signals with carrierless and intensity-only measurements with phase retrieval (PR) receiving techniques. The intensity errors during measurement, i…
View article: Real-time Optical Network Sensing Control Plane Enabled by a Novel Sub us Response Time Fibre Sensing Control Device
Real-time Optical Network Sensing Control Plane Enabled by a Novel Sub us Response Time Fibre Sensing Control Device Open
We propose and implement a novel fibre sensing control device and associated sensing control plane that effectively controls backscatter and polarization-based fibre sensing. We experimentally demonstrate in a fibre network that this devic…
View article: Record Photon Information Efficiency with Optical Clock Transmission and Recovery of 12.5 bits/photon over an Optical Channel with 77 dB Loss
Record Photon Information Efficiency with Optical Clock Transmission and Recovery of 12.5 bits/photon over an Optical Channel with 77 dB Loss Open
We experimentally demonstrate optical detection at 12.5~bits per incident photon, 9.4~dB higher than the theoretical limit of conventional coherent detection. A single laser transmits both data and optical clock, undergoes 77~dB of attenua…
View article: Transmission of 273.6 Tb/s Over 1001 km of 15-Mode Multi-Mode Fiber Using C-Band Only 16-QAM Signals
Transmission of 273.6 Tb/s Over 1001 km of 15-Mode Multi-Mode Fiber Using C-Band Only 16-QAM Signals Open
In recent years, space-division multiplexing (SDM) has been proposed and investigated as a technique to increase the per-fiber capacity in order to cope with the ever-increasing demand for capacity in optical transmission networks. Conside…
View article: IEEE Photonics Technology Letters publication information
IEEE Photonics Technology Letters publication information Open
View article: On-chip metamaterial-enabled high-order mode-division multiplexing
On-chip metamaterial-enabled high-order mode-division multiplexing Open
Mode-division multiplexing (MDM) technology enables high-bandwidth data transmission using orthogonal waveguide modes to construct parallel data streams. However, few demonstrations have been realized for generating and supporting high-ord…
View article: IEEE Photonics Technology Letters publication information
IEEE Photonics Technology Letters publication information Open