We demonstrate multi-detection and recognition of mechanical events over 50km of SSMF with coherent homodyne phase-OTDR using novel Pol-Mux orthogonal interrogation codes. Pattern identification of an engine noise is highlighted, paving the way for numerous smart-city/industrial monitoring applications over already deployed telecom fibers.

Beyond 100 GBaud Transmission Supported by a 120 GSa/s CMOS Digital to Analog Converter

We demonstrate for the first time a 105 GBaud transmission using a CMOS digital to analog converter. By variable spectral efficiency by probabilistically shaped constellations we assess the maximal achievable information rate of 4 bit per symbol and demonstrate successful transmission of a 750 Gb/s channel over xx km.


We experimentally demonstrate a 19% capacity gain per Watt of electrical supply power in a 12-span link by eliminating gain flattening filters and optimizing the launch power profile using machine learning by deep neural networks in a massively parallel fiber context.

Efficient Multi-Event localization from Rayleigh backscatter in phase sensitive OTDR

We introduce a phase-OTDR multi-resolution approach to detect and localize mechanical events in standard telecom fibers. Perturbations are first roughly localized from a subset of high intensity backscatters, followed by a low complexity localization refinement

1.11 Tb/s/lambda and 18.9 Tb/s WDM transmission over DCI distances supported by CMOS DACs

We report on the optimization of a CMOS DAC transmitter based coherent system supporting bitrates beyond 1 Tb/s. We demonstrate WDM transmission over DCI distances up to 118 km at spectral efficiencies of 9.9 bit/s/Hz

Quantized Machine Learning Process Empowering An IM-DD Link Running in Real-time on a Field Programmable Gate Array

We demonstrate a field programmable gate array running real-time Machine Learning Digital Signal applied to a fibre-optic communication system

Technologies for Terabit Transponders

The paper reviews high speed systems at symbol rates around 100 Gbaud and discusses the supporting ADC and DAC technologies including the bandwidth extending analog multiplex and demultiplex technologies.

Probabilistic shaping: a technique for reach extension of QAM systems with superior flexibility

Probabilistic shaping of QAM constellations has been investigated intensively for its application in optical transmission system. Beside an improvement of maximum transmission distances by operating those systems closer to the Shannon limit it exhibits an extreme flexibility without any given granularity. In this paper we review the application of probabilistic ...

Terrestrial Transmission Reach Doubling at record spectral efficiency flexibility for 400 Gb/s and 600 Gb/s Supported by variable (non)-pragmatic square QAM Formats

We implement a variable pragmatic and nonpragmatic square QAM system up to 256QAM and high bitrates of 400 Gb/s and 600 Gb/s. We demonstrate 100% increase in transmission reach by a large are terrestrial fiber.

Novel Polarization-Multiplexed Probing Technique for Distributed Acoustic Sensing Systems

We propose new polarization-coded binary sequences based on complementary Golay codes to enhance the performance of FBG-based sensor arrays. Speech signals are sensed from the optical phase with a linear response and a bandwidth coverage up to 18 kHz.

Improvement of Bandwidth Limitation Tolerance for High-speed PAM-4 Transmission Using Turbo Equalizer

We beat the bandwidth limitation of low-cost IMDD system achieving high-speed PAM-4 transmission. With information iteratively delivered between equalizer and decoder, a low-complexity turbo equalizer is applied to cancel the inter-symbol interference caused by the hardware bandwidth limitation.

Nonlinear Tolerant Probabilistically Shaped Real-Valued Modulation

We apply probabilistic shaping to polarization-multiplexed real-valued signal and show that nonlinear tolerant modulation with higher spectral efficiency compared to phase-conjugated twin-wave with QPSK, is possible.

A Coverage-aware Resource Provisioning Method for Network Slicing

Network slicing appears as a key enabler for the future 5G networks. Mobile Network Operators create various slices for Service Providers (SP) to accommodate customized services. As network slices are operated on a common network infrastructure owned by some Infrastructure Provider (InP), sharing the resources across a set of network ...

0.7-um InP DHBT technology with 400-GHz fT and fMAX and 4.5-V BVCE0 for high speed and high frequency integrated circuits

We report the performances of a 0.7-µm InP/GaInAs DHBT developed in III-V Lab demonstrating both fT and fMAX of 400 GHz as well as a high fabrication yield and homogeneity on a 3-inch wafer. This technology is used for the fabrication of a very high speed 2:1 multiplexing selector operating ...

A Novel Interrupt Method for OTN Defect Transport

There are lots of alarms in an OTN network equipment which need to be processed by a reliable and fast way. After comparing several fault defect circuits, and analyzing the disadvantage of software polling method, a novel interrupt method for OTN defect transport is proposed. The interrupt method is based ...

RSRP Fingerprinting and Deep Learning Assisted UE Positioning in 5G

In this work, we investigate user equipment (UE) positioning assisted by deep learning (DL) in 5G and beyond networks. As compared to state of the art positioning algorithms used in today's networks, radio signal fingerprinting and machine learning (ML) assisted positioning requires smaller additional feedback overhead; and the positioning estimates ...

Learning-Based Link Scheduling in Millimeter-wave Multi-connectivity Scenarios

Multi-connectivity is emerging as a promising solution to provide reliable communications and seamless connectivity for the millimeter-wave frequency range. Due to the blockage sensitivity at such high frequency range, coordination among the network elements and connectivity with multiple cells can drastically increase the network performance in terms of throughput and ...

Caching to the Sky: Proactive Deployment of Cache-enabled SBSs for Cellular-Connected UAVs

Enhancing LTE support for aerial users has become the study focus of recent 3rd Generation Partnership Project (3GPP) standardizations due to their high maneuverability and flexibility for on-demand deployment. A question arises: how to serve aerial users using LTE network deployments with base station (BS) antennas targeting terrestrial coverage. In ...

A Systematic Study of Unsupervised Domain Adaptation for Robust Human-Activity Recognition

Wearable sensors are increasingly becoming the primary interface for monitoring human activities. However, in order to scale human activity recognition (HAR) using wearable sensors to million of users and devices, it is imperative that HAR computational models are robust against real-world heterogeneity in inertial sensor data. In this paper, we ...