Eric Dutisseuil

Transmission of 96×100Gb/s with 23% super-FEC overhead over 11,680km, using optical spectral engineering

We transmit 96 PDM-QPSK channels at 100Gb/s over 11,680km, matching the best capacity × distance product reported, but with C-band-only EDFAs. 2.7b/s/Hz spectral density is obtained, despite 23% super-FEC overhead, with optical spectral engineering.

Real-time implementation of packet-by-packet polarization demultiplexing in a 28 Gb/s burst mode coherent receiver

We experimentally show a real-time coherent receiver operated in burst mode. Enabled by special headers, 28-Gb/s PDM-QPSK packets with random states of polarizations are successfully demodulated, and the sensitivity to optical noise is reported.

Real-time demonstration of software-defined Elastic interface for flexgrid networks

We demonstrate a real-time Elastic Interface for future flex-grid networks with a software-defined symbol rate transmission. Using PDM-QPSK modulation, live experiments show a line rate adaptation from 10.7 to 107Gbit/s with a sub-millisecond reconfiguration time.

34 Gb/s PDM-QPSK coherent receiver using SiGe ADCs and a single FPGA for digital signal processing

A fully reprogrammable coherent receiver using an integrated coherent front end, four high speed ADCs and powerful FPGAs is reported and tested against optical noise level, chromatic dispersion and PMD for various equalizer filter length.

Elastic optical interface with variable baudrate: Architecture and proof-of-concept

Varying the symbol rate is an alternative or complementary approach to varying the modulation format or the channel spacing to turn optical networks into elastic networks. We propose to allocate just-enough bandwidth for each optical connection by adjusting the symbol rate such that the penalty originating from long cascades of optical filters is contained. This helps reduce overprovisioning for lightpaths where full capacity is not needed, by (i) eliminating unnecessary regenerators and (ii) reducing the power consumption of terminals, when the clock rate of electronics is reduced along with the baudrate. We propose a novel architecture for an elastic optical interface by combining a variable bitrate transceiver, paired with an elastic aggregation stage, with software-defined control. We then report a real-time field-programmable-gate-array-based prototype that delivers flexible transport frames to be sent with a polarization-division multiplexed quadrature phase-shift keying modulation format. We interconnect this prototype with a commercial optical transport network switch and a centralized controller. We demonstrate fast and hitless reconfiguration of the interface and measure the reconfiguration time of hardware logic (<450 μs), as well as end-to-end control and the data plane (<0.9 s).

Record 505 km unrepeatered 4x43Gb/s APol-RZ-DPSK transmission

The alternate polarisation-RZ-DPSK modulation format extends the 43 Gb/s unrepeatered transmission distance to 505 km, with E-PSCF fibre, third-order Raman pumping and a remotely-pumped amplifier.

Cost efficient network slicing for optical packet switched torus data centers

In this paper, for the first time, a cost efficient network slicing method is proposed for torus data centers based on optical packet switching transport. The torus optical packet switched rings are separately synchronized so that electronic regrooming is employed at the nodes connecting different rings, for the inter-ring transit of optical packet traffic. In the proposed network slicing method called “HYB-BOSS network slicing”, we introduce optical circuit switching over “network slicing paths” in order to leverage low-cost network operation. The resulting network has a hybrid optical packet/circuit switching architecture. Next, an optimal network planning tool is developed to evaluate the cost efficiency of HYB-BOSS network slicing in terms of required optical interfaces and optical fibers when compared with network slicing in purely optical packet switched torus. The numerical results show that HYB-BOSS network slicing can reduce the number of optical interfaces in a network by up to 33%.

21 Gb/s polarization switched-QPSK real-time coherent FPGA-based receiver

A real-time FPGA-based receiver of 21Gb/s PS-QPSK signal is reported and tested against optical noise, chromatic dispersion (CD), polarization mode dispersion (PMD) and state of polarization (SOP) scrambling. A comparison with PDM-QPSK realized with equivalent parameterized setup and signal processing confirm the greater tolerance of PS-QPSK over PDM-QPSK.