Hardware and software disaggregation is a recognized strategy for achieving efficiency cost reduction within datacentre warehouse. More recently this approach has been applied to high-bandwidth inter-datacenter connectivity at the transport layer. Telecom Operators look with great interest which promises savings that could make difference in years of ever decreasing margins on revenues. This paper presents analyzes how models wavelength division multiplexing (WDM) layer replace established...

The authors report the first demonstration of all-optical header recognition and self-routing ultrafast packets with multibit addresses. A single optical AND gate recognises 6 bit 'keyword' codes, allowing 100 Gbit/s packets. [This Letter appeared in print 1995, issue 17, p.1475–1476, has been reprinted because significance corrections.]

We propose a new simple method to achieve precise symbol synchronization using one start-of-frame (SOF) in optical fast orthogonal frequency-division multiplexing (FOFDM) with subchannel spacing equal half of the rate per subcarrier. The proposed first identifies SOF symbol, then exploits evenly symmetric property discrete cosine transform FOFDM, which is also valid presence chromatic dispersion, synchronization. demonstrate its use 16.88-Gb/s phase-shifted-keying-based FOFDM system over...

The authors report the first demonstration of all-optical header recognition and self-routing ultrafast packets with multibit addresses. A single optical AND gate recognises 6 bit 'keyword' codes, allowing 100 Gbit/s packets. [This article has been reprinted due to significance corrections. appears in 1995, issue 25, p.2201–2202.]

A first demonstration of P4-based virtual network function (VNF) for latency-critical services is presented. The VNF exploits P4 In-band telemetry to dynamically enforce per-packet QoS priority according cumulated latency performance.

4 ps pulses with low temporal jitter (0.6 ps) and reduced pedestal (> 25 dB extinction) have been generated from a 1548 nm gain switched distributed feedback laser diode (DFB) pulse source at 2.5 GHz using continuous wave (CW) light injection for suppression an electroabsorption modulator (EAM) suppression.

Network operators will require autonomous operation with the help of artificial intelligence to reduce operational expenditures and create networks that are easier manage maintain. However, not all operate in same way. Therefore, we may have different operator-specific use cases for such operations. Differences arise from range variety services social and/or cultural difference/background. believe there should be a common framework achieve an world network operation. We discuss requirements...

For the first time, we demonstrate orchestration of elastic datacenter and inter-datacenter transport network resources using a combination OpenStack OpenFlow. Programmatic control allows operator to dynamically request optical lightpaths from accommodate rapid changes workflows.

In this paper we report field transmission of a 2 Tbit/s multi-banded Coherent WDM signal over BT Ireland's installed SMF, using EDFA amplification only, with mixed Ethernet (with FEC) and PRBS payloads. To the best our knowledge, results obtained represent highest total capacity transmitted SMF orthogonal subcarriers. BERs below 10(-5) no frame-loss were recorded for all 49 Extended BER measurements several hours showed fluctuations that can be attributed to PMD dynamic effects associated...

SDN traffic engineering is used to assign bandwidth flows. Classic algorithms are well understood however implementations of these typically take seconds or even minutes execute. These long execution times force be as an off-line tool. We demonstrate a algorithm equivalent classic that executes in millisecond times, allowing on-line tool -- much shortest path computations today's routers.

The authors demonstrate an optical TDMA LAN with a 40 Gbit/s capacity, which is being used to interconnect high-end computer workstations. entire requires only one pulse source, and uses very few components at each node read write data.

Software Defined Networking (SDN) and Network Function Virtualization (NFV) provide an alluring vision of how to transform broadcast, contribution content distribution networks. In our laboratory we assembled a multi-vendor, multi-layer media network environment that used SDN controllers NFV-based applications schedule, coordinate, control flows across broadcast infrastructure. — This paper will share experiences investigating, designing experimenting in order build the next generation...

We experimentally demonstrate the use of full-field electronic dispersion compensation (EDC) to achieve a bit error rate 5times10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">- 5</sup> at 22.3 dB optical signal-to-noise ratio for single-channel 10 Gbit/s on-off keyed signal after transmission over 496 km field-installed single-mode fibre with an amplifier spacing 124 km. This performance is achieved by designing EDC so as avoid amplification...

We propose a novel method to achieve precise symbol synchronization using one training in DSB optical fast OFDM (FOFDM). World-first FOFDM transmission experiment field-installed fiber verifies its robustness the noise and CD.

The impact of hybrid erbium-doped fiber amplifier (EDFA)/Raman amplification on a spectrally efficient coherent-wavelength-division-multiplexed (CoWDM) optical communication system is experimentally studied and modeled. Simulations suggested that 23-dB Raman gain over an unrepeatered span 124 km single-mode would allow decrease the mean input power ~6 dB for fixed bit-error rate (BER). Experimentally we demonstrated 1.2-dB Q-factor improvement 2-Tb/s seven-band CoWDM with backward...

4.4 ps pulses generated from a 1546 nm gain-switched DFB-SLD using 6 mm long linearly step-chirped fibre grating represent temporal compression factor of 4.3. The pulse source is stable, compact and dispenses with the dispersion compensating conventionally used for compression.

We propose a novel field-detection based maximum likelihood sequence estimation (FD-MLSE), and experimentally demonstrate transmission over 372 km of field-installed SMF without optical dispersion compensation using 4-state MLSE.

In this paper we discuss high symbol rate all-optical orthogonal frequency division multiplexing (OFDM), focusing on phase optimisation, optimum for dispersion managed systems, and Ethernet performance.

We experimentally investigate an improved fast orthogonal frequency division multiplexing (OFDM) scheme using intensity modulation and full-field detection. This new OFDM algorithm exhibits better back-to-back transmission performance than the conventional one, is shown to support a 40-Gb/s signal over 480-km re-circulating loop-based single-mode fiber (SMF) with 1-dB penalty. compare this direct-detection (DD) system same algorithm, show that DD cannot 60-km SMF at 40 Gb/s. Finally, we...

We describe the first experimental demonstration of an asynchronous digital optical regenerator. Error-free regeneration 10-Gb/s packets up to 40000 bits long has been demonstrated without clock recovery. It is that nodes in this network may operate with independent clocks, within certain practical limits, offering possibility arbitrary mesh time-division multiplexing networks.

Recent developments in system control by the CEGB, including use of digital computers, are described paper. The CEGB 2-tier is being reinforced ‘district’ rooms and new ‘area’ at existing area centres, a national centre London with selective electronic display. changeover to 3-tier operation district, controls will be completed 1968–69.

We propose a new metric to significantly simplify 4-state full-field maximum likelihood sequence estimation, demonstrate its use in 372km field-installed fiber transmission experiment without performance degradation, and investigate the influence of critical system parameters.

We propose symmetric extension based guard interval (GI) to enable CD compensation with one-tap equalizers after discrete-cosine transform in optical fast-OFDM, and experimentally demonstrate 20Gbit/s 4-ASK transmission over 124km field-installed SMF varied GI length.

We experimentally verify the feasibility of receiver-side electronic dispersion compensation using optical-field reconstruction, and theoretically increase fundamental limit this technique to 2000 km by successfully suppressing instability from low-frequency amplification in phase reconstruction.