25G Based PON Technology

Commercial PONs have traditionally leveraged mature components from transport systems. Starting with 25G PON, the data center ecosystem will be leveraged. A strategy to accommodate higher loss budgets at lower cost is presented.

Cross-layer Aware Packet-Optical Link Management in Software-Defined Network Operating System

Software-defined network management systems presently lack joint link-status awareness on both packet and optical layers. Using a NOS with cross-layer link awareness, we demonstrate faster service restoration of packet links over failed optical links.

180-GBaud All-ETDM Single-Carrier Polarization Multiplexed QPSK Transmission over 4480 km

We demonstrate PDM-QPSK transmission over 4480 km at a record all-electronically multiplexed symbol rate of 180 GBaud, providing a line rate of 720 Gb/s on a single optical carrier enabled by high-speed InP-DHBT selectors.

Coupled-Core EDFA Compatible with FMF Transmission

We report a 6-core coupled-core fiber amplifier compatible with 6-mode FMF. The coupled-core amplifier not only reduces mode dependent gain but also introduces strong random mode mixing, thus easing mode dependent impairments in FMF transmission systems.

Pump Mode Characterization of Annular Cladding Erbium-Doped Fibers Using Low-Coherence Interferometry

We characterize core and cladding pump modes of annular cladding 6-core 3-mode erbium-doped fibers using low-coherence interferometry (LCI). Efficient mode conversion at pump wavelength for modal gain equalization is also demonstrated and characterized by LCI.

204-GBaud On-Off Keying Transmitter for Inter-Data Center Communications

We demonstrate an on-off keyed transmitter with direct detection, at record symbol rates of 204Gbaud and 140Gbaud, over 10km and 80km, respectively, powered by a high-speed InP-based 2:1 selector and travelling-wave electro-absorption laser-modulator.

Ultra-fast Hitless 100Gbit/s Real-Time Bandwidth Variable Transmitter with SDN optical control

We designed an ultra-fast real-time bandwidth-variable transmitter achieving zeropacket loss with ∼10μs switching time, ∼40× faster than previous record. We use a new coding scheme to generate baud rates and measure reconfiguration through SDN control.

Experimental Demonstration of Fully Disaggregated White Box Including Different Types of Transponders and Monitors, Controlled by NETCONF and YANG

We experimentally demonstrated a fully disaggregated white box composed of two different types of transponders, monitors (including filtering effect parameters), add-drop multiplexers, and switches. NETCONF and YANG control the hardware.

Scaling Optical Networking Technologies for Next Generation SDM

1. Network traffic growth remains strong Sold WDM transponder capacity scales at ∼45% Scaling is widely supported by compute, storage, access scaling Optical transport is significantly falling behind → Worrisome scaling disparities (“Capacity Crunch”) 2. Parallelism is mandatory log(SNR) scaling vs. linear (pre-log) multiplexing gains 3. By 2025 we will ...

SOA for future PONs

SOA applicability to provide up to 35 dB power budget for high-rate T(W)DM-PON is analyzed. Booster and pre-amplifier in PON-applications will have utmost importance in 50 Gbit/s/wavelength IM-DD and could also be applied in coherent access solutions.

Balancing Probabilistic Shaping and Forward Error Correction for Optimal System Performance

We review probabilistic shaping (PS) and forward error correction (FEC) and study the interplay between the two to jointly maximize the overall information rate.

Record-High 17.3-bit/s/Hz Spectral Efficiency Transmission over 50 km Using Probabilistically Shaped PDM 4096-QAM

We demonstrate transmission of a 10-subcarrier superchannel with a record-high intra-channel spectral efficiency of 17.3 bit/s/Hz over 50-km backward Raman amplified Corning Vascade EX2000 fiber using 3-GBd probabilistically shaped PDM 4096-QAM.

Scalable Mode sorter supporting 210 Hermite-Gaussian modes

We demonstrate a multi-plane light conversion device based on 7 planes which maps Hermite-Gaussian spatial modes with indices (m,n) onto a Cartesian grid (x,y) of diffraction limited spots for 210 spatial modes.

Ultra-High Bandwidth Integrated Lithium Niobate Modulators with Record-Low Vpi

We demonstrate integrated lithium niobate electro-optic modulators with up to 100-GHz electro-optic bandwidth and Vpi as low as 1.4 V. We show 70 GBaud and 100 GBuad m-ASK modulation with the fabricated modulator.

First Demonstration of an Ultra-Low-Latency Fronthaul Transport Over a Commercial TDM-PON Platform

We demonstrate for the first time, feasibility of latency-critical mobile fronthaul (CPRI) transport over a 6 km PON infrastructure with co-existing residential broadband traffic using a standards-compliant commercial TDM-PON platform with a sub-200 µs round trip delay.

Fiber type dependent benefits when deploying up-to-300Gb/s elastic transponders adapting to ageing of margins

We compare cost savings when planning a WDM French backbone network based on SSMF or LEAF, with 32 GBaud elastic optical transponders adapting their capacity from 100 Gb/s to 300 Gb/s to the actual ageing margins.

Nonlinear propagation equations for arbitrary levels of random linear coupling between modes

We derive expressions that enable the study of the impact of arbitrary levels of linear coupling between spatial modes on nonlinear propagation in space-division multiplexed transmission systems, valid for both multimode and coupled-core fibers.

1.6Tbps WDM Direct Detection Transmission with Virtual-Carrier over 1200km

We demonstrate 1.6Tbps 8-channel WDM direct detection transmission with virtual carriers over a record distance of 1200km with Corning TXF fiber by using either Kramers-Kronig receiver or a low complexity interference cancellation scheme.

Components for High Speed 5G Access

Emerging access networks raise the need for specific components. We present a counter-heating method for wavelength stabilisation in NGPON2 TWDM-PON systems. Then we present a +6dBm high-power externally modulated laser at 10Gb/s and 28Gb/s for XGS-PON or 25G-EPON systems.

Probabilistic Constellation Shaping: Challenges and Opportunities for Forward Error Correction

We discuss the impact of probabilistic amplitude shaping on the forward error correction stage in future optical transceivers and highlight some potential pitfills, as well as challenges and opportunities for future research that may arise.