100nm ultra-wideband optical fiber transmission systems using semiconductor optical amplifiers

We report on the use of semiconductor optical amplifiers to enlarge optical bandwidth of next generation optical systems. We review the recent demonstration of the first > 100Tb/s transmission based on novel 100nm-wide SOA over 100km distance.

Automated fiber type identification

We correlate accumulated chromatic dispersion measured in a live coherent receivers to autonomously identify fiber types in a 11-link network without traffic interruption

Nonlinear Interactions in Fibers Supporting Multiples Spatial Modes

We present recent developments on intermodal nonlinear interactions present in fibers supporting multiple spatial modes that are linearly coupled or uncoupled.

Improved Reliability of C-V2X Communication Based on LTE SC-PTM

Vehicle to Everything (V2X) communication over cellular networks is gaining momentum as it enables both short-range and long-distance information sharing with low latency over an existing infrastructure. V2X traffic is dominated by each vehicle's periodic state dissemination targeted to its momentary neighbors within a geographical proximity. As such demand meets ...

Spectral Broadening of Gaussian Process in Optical Fibre and Implication on the Spectral Efficiency

This work characterizes the spectral evolution of the Gaussian process in an optical fibre using Kolmogorov-Zakharov (KZ) model. At high power regime, the spectrum at receiver is calculated by iteratively solving KZ model at a shorter distance. It aims to demonstrate that a monotonically increasing spectral efficiency is impossible.

How efficient can routing of individual 37.5 GHz-spaced 100 Gb/s 33 GBaud carriers be in WDM mesh core networks?

With a real-time transponder, we assess the penalty on a 100 Gb/s 33 GBaud carrier through a series of sixteen 37.5 GHz-wide filters, and discuss how far this suits WDM mesh terrestrial networks.

Ultra Wide Hybrid III-V On Silicon Tunable Laser

We demonstrated a wide wavelength-tuning range of 92 nm with a hybrid InP/SOI laser, based on two integrated intracavity silicon ring resonators which produce a Vernier effect, and a low losses silicon cavity delimited by broadband Sagnac mirrors.

Low-Loss Silicon-Photonic Devices for Mid-Infrared Applications

We demonstrate low-loss silicon-on-insulator devices for 2-μm or longer wavelengths. We achieve waveguide loss as low as ~0.18 dB/cm and further demonstrate high quality factor micro-ring resonator with intrinsic Q of ~0.56 million and free spectral range of 100 GHz.

A Survey of Super-Resolution in Iris Biometrics with Evaluation of Dictionary-Learning

The lack of resolution has a negative impact on the performance of image-based biometrics. While many generic super-resolution methods have been proposed to restore low-resolution images, they usually aim to enhance their visual appearance. However, an overall visual enhancement of biometric images does not necessarily correlate with a better recognition ...

Modulation over Nonlinear Fourier Spectrum: Continuous and Discrete Spectrum

Nonlinear Frequency Division Multiplexed (NFDM) systems are considered when data is modulated in both parts of the nonlinear Fourier spectrum: continuous spectrum and discrete spectrum. An efficient algorithm is introduced to generate a time-domain signal from a given nonlinear spectrum. The transmission of such NFDM symbols is experimentally demonstrated over ...

Modulation on Discrete Nonlinear Spectrum: Perturbation Sensitivity and Achievable Rates

Multi-soliton pulses are studied under small perturbations. By means of mutual information (MI), we show that the nonlinear spectrum becomes correlated when a 64-PSK modulated 2-eigenvalues soliton is perturbed by a small additive white Gaussian noise (AWGN). Transmission over two channels are considered: an AWGN channel (back-to-back scenario) and an ...

A Low-Cost Scalable 32-Element 28-GHz Phased Array Transceiver for 5G Communication Links Based on a 2x2 Beamformer Flip-Chip Unit Cell

This paper presents a scalable 28-GHz phased-array architecture suitable for fifth-generation (5G) communication links based on four-channel (2x2) transmit/receive (TRX) quad-core chips in SiGe BiCMOS with flip-chip packaging. Each channel of the quad-core beamformer chip has 4.6-dB noise figure (NF) in the receive (RX) mode and 10.5-dBm output 1-dB compression ...

25.4 Tb/s Transmission over Trans-Pacific Distances Using Truncated Probabilistically Shaped PDM-64QAM

Probabilistic constellation shaping (PCS), digital nonlinear compensation, and multi-rate spatially coupled low-density parity check codes are used to achieve 25.4 Tb/s transmission over 10,285km EDFA-only straight-line testbed at 6.1 bits/symbol/Hz. The gain provided by PCS over standard 64QAM is investigated over trans-Atlantic and trans-Pacific distances. Moreover, the potential benefits of ...

A Multiscale Sparse Array of Spatially-Spread Electromagnetic-Vector-Sensors for Direction Finding and Polarization Estimation

A multiscale sparse array, which is composed of spatially-spread electromagnetic-vectorsensors (SS-EMVSs), is proposed to estimate the direction-of-arrivals (DOA) and polarizations of multiple sources. The SS-EMVS is composed of three orthogonally oriented but spatially noncollocated dipoles to measure the electric field and three orthogonally oriented but spatially noncollocated loops to measure ...

Compact High Isolation Base-Station Duplexer Using Triple-Mode Ceramic Cavities

  • Abbosh A.
  • Hendry D.

A microwave duplexer with high isolation is presented. The device is based on triple mode filters that are built using silver plated ceramic cuboids. To create a six-pole, six-transmission zero filter in the DCS-1800 band, which is utilized in mobile communications, two cuboids are cascaded. To shift spurious harmonics, low ...

A Unified Array Geometry Composed of Multiple Identical Subarrays With Hole-Free Difference Coarrays for Underdetermined DOA Estimation

In this paper, we propose a unified array geometry, dubbed generalized nested subarray (GNSA), for the underdetermined direction-of-arrival estimation. The GNSA is composed of multiple, identical subarrays, which can be a minimum redundancy array (MRA), a (super) nested array, a uniform linear array (ULA), or any other linear arrays with ...

MIMO Time-domain Equalization for High-Speed Continuous Transmission Under Channel Variability

High-speed communication over mutually coupled channels can be severely affected by intersymbol interference (ISI) and crosstalk (XT). Multiple-input multiple-output (MIMO) equalization is known to mitigate both ISI and XT, but requires accurate channel information at the receiver (RX) and/or transmitter (TX) when the channel is stochastic. However, since adjusting the ...

Network Slicing & Softwarization: A Survey on Principles, Enabling Technologies & Solutions

Network slicing has been identified as the backbone of the rapidly evolving 5G technology. However, as its consolidation and standardization progress, there are no literatures that comprehensively discuss its key principles, enablers and research challenges. This paper elaborates network slicing from an end-to-end perspective detailing its historical heritage, principal concepts, ...

A Fast and Low-Loss Electromagnetically Tunable Optical Filter

Fast and simple optical filtering is a prerequisite for low-cost passive optical networking using multiple wavelengths to scale to higher capacity. We demonstrate a simple electromagnetically tuned optical filter capable of tuning across more than 700 GHz of optical spectrum in under 1 ms with low optical loss. We show ...

A Latency and Reliability Guaranteed Resource Allocation Scheme for LTE V2V Communication Systems

By leveraging the direct device-to-device (D2D) interaction, LTE Vehicle-to-Vehicle (V2V) communication becomes a promising solution to meet the stringent requirements of vehicular communication. In this paper, we propose to jointly optimize radio resource, power allocation, and modulation/coding schemes of the V2V communications, in order to guarantee the latency and reliability ...