Field trial of a low-margins yet ageing-proof optical network

Operating a network close to its limits while assuring long-term health seems incongruous. Still, by leveraging a SDN-based observe-decide-act architecture, we demonstrate over a field-deployed fiber a network that can operate with low margins while automatically adjusting to ageing or failures of network equipment, including optical nodes.

Evolution towards Telco-Cloud: Reflections on Dimensioning, Availability and Operability

There are multiple drivers of moving away from physical implementation of telecommunication network elements towards software (SW) only deployments in all IP networks. One of the major motivations is the possibility to use commercial IT hardware as platform, due to cost efficiency and the common required experience for HW operation ...

Massive MIMO is a Reality - What is Next? Five Promising Research Directions for Antenna Arrays

Massive MIMO (multiple-input multiple-output) is no longer a "wild" or "promising" concept for future cellular networks--in 2018 it became a reality. Base stations (BSs) with 64 fully digital transceiver chains were commercially deployed in several countries, the key ingredients of Massive MIMO have made it into the 5G standard, the ...

E2E Analytics Framework for 5G Architecture

Data Analytics can be seen as a powerful tool which can be used by 5G system, to enable the transformation of the envisioned challenging 5G features into a reality. In current 5G architecture, some first steps have been performed in this direction, by introducing new functions in core and management ...

DIGITAL TURBULENCE COMPENSATION OF FREE SPACE OPTICAL LINK WITH AMPLIFIER MULTIMODE OPTICAL

We demonstrate digital turbulence compensation using a 12-spatial mode digital coherent receiver with a multimode pre-amplifier that provides a 6-dB sensitivity improvement. This combination acts similarly to ideal lossless adaptive optics. Coherent superposition of 12 spatial-modes reduced median BER from 0.1 to 1 x 10 -5 compared to traditional single-mode ...

Fast H.264 intra prediction for network video processing

This letter proposes a fast parallel and deeply pipelined architecture for realtime H.264 intra4x4 prediction capable of handling up to 32 High Definition video streams (1920 × 1080 @ 30fps) simultaneously, while offering high flexibility and consuming only a fraction of resources available on modern FPGA's. The design has been ...

Beyond 400 Gb/s Direct Detection over 80km for DCI Applications

Due to the growing demand for cloud services with high availability, high connection speed and low latency, distributed data-center has emerged as a key architecture for future optical network. This architecture relies on power and cost-efficient solutions for 400 Gb/s and beyond client interfaces over distances up to 80 km ...

DO AGEING OF MARGINS BECOME MORE ATTRACTIVE IN WDM NETWORKS WITH 64 GBAUD TRANSPONDERS AND REGENERATORS?

Optical transport networks are evolving towards a full exploitation of physical layer resources thanks to the combination of elastic optical transponders and optical performance monitoring. If the quality of transmission achieved on a lightpath is provided by coherent receivers, elastic transponders can adjust their data rate to take advantage of ...

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 ...

103nm Ultra-Wideband Hybrid Raman/SOA Transmission over 3×100 km SSMF

We report on the ultra-wideband (UWB) transmission of a 103 nm signal over 3×100 km of standard single mode fiber (SSMF). We characterize the nonlinear stimulated Raman scattering (SRS) effects occurring in high power regime for this UWB spectrum. We study the evolution of SRS over the bandwidth when tilting ...

Net 800 Gb/s Transmission over 605 km using 99.5 GBd PM-64QAM with High-speed CMOS Digital-to-Analog Converter

We demonstrate the transmission over 605 km of a 800 Gb/s 99.5 GBd polarization multiplexed (PM) 64QAM channel inserted in a wavelength division multiplexed (WDM) full C-band spectrum, using cutting-edge high-speed CMOS digital-to-analog converter (DAC), with digital and optical spectrum optimization technique.

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.

Responsivity enhancement of double heterojunction bipolar transistors for wireless terahertz communication

We report a detailed experimental study of the responsivity and output impedance matching of InP DHBTs used as detectors for high data-rate terahertz wireless communication.

Numerical Simulations of Pulsating Heat Pipes, Part 1: Modelling

The pulsating nature of a closed loop pulsating heat pipe (CLPHP) makes the prediction of its thermal-hydraulic performance extremely challenging. Unfortunately, the design of CLPHPs is still quite an empirical process, requiring testing of many prototypes by cold plate fabricators and thus inhibiting their possibilities for application. This means that ...

A 112-GS/s 1-to-4 ADC front-end with more than 36-dBc SFDR and 28-dB SNDR up to 43-GHz in 130-nm SiGe BiCMOS

Voltage-mode sampling circuits operating at mm-wave frequen-cies require clocks with root-mean-squared (RMS) jitter in the two-digit femtosecond range for high SNR performance. The generation of such clean clocks, however, presents a serious de-sign challenge. To mitigate this problem, an alternative sampling approach based on charge sampling is proposed. For the ...

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

Transmission of 90 Gbd 32 QAM over 480 km of SSMF with Kramers-Kronig Detection

We demonstrate transmission at a record symbol rate 90 GBaud with Kramers-Kronig detection. With 32 QAM the line rate is 450 Gb/s (360 Gb/s net rate). We show successful transmission over 480 km of SSMF

Artificial Intelligence / Machine Learning for Anomaly Detection in Cloud

Hybrid Anomaly Detection Model (HADM) is a platform that filters network traffic and identifies malicious activities on the network. The platform applies data mining algorithms to effectively detect cyber attacks in high load networks. The platform uses combination of linear and learning algorithms together with protocol analyzer. The supervised algorithms ...

Pre- and post-transmission digital signal processing using neural networks applied to fiber-optic communication systems relying on power modulation and power detection : Advantages and drawbacks

For ML Photonica 2019: https://ml-photonica2019.astonphotonics.uk/ In this presentation we explain the nonlinearities and complexity of transceivers relying on power modulation and detection. We detail the challenges for reliable communication through this type of channel when trying to deliver high bitrates over a few tens of kilometers.

SUPPLY-POWER-CONSTRAINED CABLE CAPACITY MAXIMIZATION USING DEEP NEURAL NETWORKS

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.