113 research outputs found
Sub-Nyquist Field Trial Using Time Frequency Packed DP-QPSK Super-Channel Within Fixed ITU-T Grid
Sub-Nyquist time frequency packing technique was demonstrated for the first
time in a super channel field trial transmission over long-haul distances. The
technique allows a limited spectral occupancy even with low order modulation
formats. The transmission was successfully performed on a deployed Australian
link between Sydney and Melbourne which included 995 km of uncompensated SMF
with coexistent traffic. 40 and 100 Gb/s co-propagating channels were
transmitted together with the super-channel in a 50 GHz ITU-T grid without
additional penalty. The super-channel consisted of eight sub-channels with
low-level modulation format, i.e. DP-QPSK, guaranteeing better OSNR robustness
and reduced complexity with respect to higher order formats. At the receiver
side, coherent detection was used together with iterative maximum-a-posteriori
(MAP) detection and decoding. A 975 Gb/s DP-QPSK super-channel was successfully
transmitted between Sydney and Melbourne within four 50GHz WSS channels (200
GHz). A maximum potential SE of 5.58 bit/s/Hz was achieved with an OSNR=15.8
dB, comparable to the OSNR of the installed 100 Gb/s channels. The system
reliability was proven through long term measurements. In addition, by closing
the link in a loop back configuration, a potential SE*d product of 9254
bit/s/Hz*km was achieved
Programmable transponder, code and differentiated filter configuration in elastic optical networks
La GAS (Gene Assisted Selection) per il miglioramento delle caratteristiche quali-quantitative del latte di capra
First demonstration of multi-vendor and multi-domain EON with S-BVT and control interoperability over Pan-European testbed
The operation of multi-domain and multi-vendor EONs can be achieved by interoperable Sliceable Bandwidth Variable Transponders, a GMPLS / BGP-LS-based control plane and a planning tool. This paper reports the first full demonstration and validation this end-to-end architecture
Benthic macrofauna structure in the northeast area of Todos os Santos Bay, Bahia State, Brazil: patterns of spatial and seasonal distribution
12.5GHz-100GHz tunable spacing optical carrier source for flexgrid bandwidth variable transponders
First Field Trial Demonstration of Hitless Defragmentation with Signals Overlap in Elastic Optical Networks
We experimentally demonstrate for the first time hitless spectrum defragmentation exploiting signals overlap in a field trial. Spectrum resources are shared without signals loss. The defragmentation procedure was successfully verified through 32Gbaud PM-QPSK-TFP signals over 1320km installed fiber
- …