Discrete Cosine Transform based Pilot-Aided Phase Noise Estimation for High-Order QAM Coherent Optical Systems

  • Kaneda N.
  • Zhu C.

We present a low-complexity, feed-forward pilot-aided phase noise estimation based on discrete cosine transform low pass filter model for high-order QAM signals. The proposed scheme is experimentally demonstrated in 11-Gbaud dual-polarization 128/256 QAM systems.

Tapless Locking of Silicon Ring Modulators for WDM Applications

  • Chen Y.
  • Dong P.
  • Kim K.
  • Melikyan A.

Novel technique for tapless locking of multiple silicon ring modulators for WDM applications is discussed. Wavelength locking of the dual channel WDM 20 Gbit/s transmitter with an athermal operation over temperature variations of +-10C is demonstrated.

Do elastic transponders with granularity finer than 50 Gb/s make gradual fit of modulation to ageing more profitable?

  • Bigo S.
  • Pesic J.
  • Rossi N.
  • Zami T.

We evaluate the potential benefits of relatively fine granular rate adaptive transponders to better progressively fit the ageing of the margin in WDM networks over a decade. The underlying technology and cost savings are presented for two network core topologies.

On Performance and Complexity of OSD for Short Error Correcting Codes in 5G-NR

  • Alloum A.
  • Boutros J.
  • Moeneclaey M.
  • Van Wonterghem J.

We compare the performance of a selection of short and very short length linear binary codes on the binary-input Gaussian channel. We use the probabilistic Ordered Statistics Decoder, that is universal to any code construction. As such we compare codes and not decoders. The word error rate versus the channel ...

Four-Core Coupled-Core Optical Amplifier

  • Amezcua-Correa R.
  • Burrows E.
  • Chen H.
  • Essiambre R.
  • Eznaveh Z.
  • Fontaine N.
  • Hasegawa T.
  • Hayashi T.
  • Lopez J.
  • Ryf R.
  • Schulzgen A.
  • Tamura Y.
  • Taru T.
  • Zaharias J.

We demonstrate a fiber amplifier that has strongly coupled cores at both the pump and signal wavelengths. Strong mode-coupling minimizes the mode dependent loss and simplifies pump distribution.

Integrated ultra-wide band wavelength-tunable hybrid external cavity silicon-based laser

  • Brenot R.
  • Chen Y.
  • De Valicourt G.
  • Dong P.
  • Verdier A.

We demonstrate a novel hybrid III-V/Si laser, which includes a broadband RSOA and an silicon-based photonic integrated circuit. The device shows high output power (up to +15 dBm) and wide tuning range (> 95nm) covering the C and L band with side mode suppression ratio greater than 35 dB.

218-Gb/s Single-Wavelength, Single-Polarization, Single-Photodiode Transmission Over 125-km of Standard Singlemode Fiber Using Kramers-Kronig Detection

  • Antonio Mecozzi
  • Chen X.
  • Cristian Antonelli
  • Mark Shtaif
  • Raybon G.
  • Sethumadhavan C.
  • Sinsky J.
  • Winzer P.

We demonstrate a 218-Gb/s direct detection receiver using Kramers-Kronig optical phase reconstruction and chromatic dispersion compensation based on a single photodiode and achieve single-span transmission over 125 km of standard singlemode fiber at 1550 nm.

Fast DAC Solutions for Future High Symbol Rate Systems

  • Chen X.
  • Pupalaikis P.
  • Sethumadhavan C.
  • Winzer P.

We review electronic digital-to-analog converter (DAC) technologies with sampling rates beyond 200 GSa/s and analog electrical bandwidths of 100 GHz using digital bandwidth interleaving. These allow the all-electronic generation of up to 195-GBaud electrical and 180-Gbaud optical modulation formats.

Hybrid III-V/Silicon Integration: Enabling the Next Generation of Advanced Photonic Transmitters

  • Brenot R.
  • Chang C.
  • Chen Y.
  • De Valicourt G.
  • Dong P.
  • Eggleston M.
  • Kim K.
  • Lee S.
  • Maho A.
  • Melikyan A.
  • Sethumadhavan C.
  • Simsarian J.
  • Sinsky J.
  • Zhu C.

We review recent advances in hybrid integration of III-V and Silicon devices using edge coupling. Advanced design of external silicon cavity allows the realization of a broad range of on-chip functionalities. Finally, advanced hybrid transmitters and their applications for the next generation of datacenter, access, metropolitan and long haul optical ...

Evaluating the Impact of Data Center Locations and Distance-Adaptive Transmission on the Network Capacity for Serving Cloud Traffic

  • Guan K.

In this work, we evaluate the impact of distance-adaptive transmission and the locations of data centers (DCs) on the required bandwidth resources for serving DC-to-user and DC-to-DC cloud traffic.

Characterization of Electro-Optic Bandwidth for ultra-High Speed Modulators

  • Adamiecki A.
  • Borui L.
  • Chen X.
  • Dong P.
  • Raybon G.
  • Sethumadhavan C.
  • Winzer P.

We propose a novel method for measuring bandwidth of electro-optic modulators up to 100-GHz, using a 50-GHz synthesizer, an intensity modulator, a photodiode, and an optical spectrum analyzer. We measured various modulators and report our results.

Achievable Rates of Multidimensional Multisphere Distributions

  • Argell E.
  • Essiambre R.
  • Karout J.
  • Tulino A.

The maximum achievable rate or mutual information of multidimensional multisphere distributions in arbitrary dimensions in the presence of additive white Gaussian noise is derived. At high signal-to-noise ratios, 4-dimensional multisphere constellations offer higher achievable rates than 2-dimensional ones transmitted on each of the two polarizations of the optical carrier.

Shake Before Break: Per-Span Fiber Sensing with In-Line Polarization Monitoring

  • Simsarian J.
  • Winzer P.

Fast state-of-polarization transients induced by disturbances of the transmission fiber can cause errors and may indicate an imminent fiber break. We present simple in-line polarization monitoring schemes that detects fiber disturbances and enable proactive protection.

Low-latency 2D torus Burst Optical Slot Switching Data Center

  • Benzaoui N.
  • Pointurier Y.

We evaluate the performance of a BOSS data center network based on the 2D torus topology and the impact of transport mechanisms on the end-to-end latency. We show that the 2D torus BOSS data center is a low latency and scalable network.

Demonstration of 64 x 0.5Gbaud Nonlinear Frequency Division Multiplexed Transmissions with 16QAM and 32QAM Formats

  • Aref V.
  • Buelow H.
  • Thai Le S.

Record data rates of 25.6Gb/s and 32Gb/s for NFDM transmissions are experimentally demonstrated using 64 overlapping orthogonal 0.5Gbaud channels, showing for the first time, improvements of 0.7dB and 1.3dB over conventional systems at 1464km, for 16QAM and 32QAM formats, respectively

Complex Dielectric Permittivity Extraction Based on Multilayer Thin Film Microstrip Lines

  • Bulja S.
  • Kopf R.
  • Majid Norooziarab
  • Robert Cahill

This paper presents an analytical method for the extraction of the complex relative permittivity of multi-layered dielectric substrates that are used to construct thin film microstrip lines (TFMLs). The proposed approach is based on the analysis of an equivalent parallel plate waveguide filled with a dielectric substrate whose relative dielectric ...

Incentivizing social media users for mobile crowdsourcing

  • Aiello L.
  • Karaliopoulos M.
  • Koutsopoulos I.
  • Micholia P.
  • Morales G.
  • Quercia D.

We focus on the problem of contributor-task matching in mobile crowd-sourcing. The idea is to identify existing social media users who possess domain expertise (e.g., photography) and incentivize them to perform some tasks (e.g., take quality pictures). To this end, we propose a framework that extracts the potential contributors' expertise ...

Mutual service processes in Euclidean spaces: existence and ergodicity

  • Baccelli F.
  • Mathieu F.
  • Norros I.

Consider a set of objects, abstracted to points of a spatially stationary point process in R-d, that deliver to each other a service at a rate depending on their distance. Assume that the points arrive as a Poisson process and leave when their service requirements have been fulfilled. We show ...

3GPP ACLR measurements for Millimeter-Wave Wireless Backhaul Link with Self-Heterodyning Mixing

  • Ferling D.
  • Luz G.
  • Maier S.
  • Schlesinger H.
  • Woerner S.
  • Yu X.

This paper analyzes the signal quality achievable with a novel system architecture for low-power small cell remote units with integrated millimeter-wave wireless backhaul. The data signal on the backhaul link uses the same 3GPP compliant signal as with the access link serving the users. In contrast to existing systems, the ...

10G PON Technology Evolution

  • Cheng G.

This article first goes through the different ITU-T standards of 10G PON with relevant definition of wavelengths. Particularly this article shares the view of the latest XGS-PON standard, including its Transmission Convergence sub-layer and Physical Medium Dependent sub-layer, compatibility design with current PON approach and migration solution. This article also ...