Alcatel-Lucent is a French global telecommunications equipment company, headquartered in Boulogne-Billancourt, France. The company focuses on fixed, mobile, and converged networking hardware, IP technologies, software, and services. Alcatel-Lucent has operations in more than 130 countries. Alcatel-Lucent has been named Industry Group Leader for Technology Hardware & Equipment sector in the 2014 Dow Jones Sustainability Indices review and listed in the 2014 Thomson Reuters Top 100 Global Innovators for the 4th year in a row.Alcatel-Lucent's chief executive officer is Michel Combes and the non-executive chairman of the board is Philippe Camus. Camus joined the company in the third quarter of 2008, alongside Ben Verwaayen as CEO, after Alcatel-Lucent's first CEO Patricia Russo and first chairman Serge Tchuruk resigned. For 2010, the company posted revenues of €15.996 billion and a reported net loss of €334 million. For 2011, the company posted revenues of €15.068 billion and a reported profit of €1.095 billion. For 2012, the company posted revenues of €14.446 billion and a reported loss of €1.374 billion. After seven consecutive years of negative cash flows, in October 2013 the company announced plans to slash 10,000 employees, or 14% of the total current 72,000 workforce, as a part of a €1 billion cost reduction effort.In June 2013, Michel Combes announced « The Shift Plan », a three-year plan including portfolio refocusing on IP networking, ultra-broadband access and cloud; Euro 1 billion in cost savings; selective asset sales intended to generate at least Euro 1 billion over the period of the plan and the reprofiling the Group’s debt. On October 1, 2014, Alcatel-Lucent announced that it had closed the sale of its subsidiary Alcatel-Lucent Enterprise to China Huaxin Post & Telecommunication Economy Development Center.Alcatel-Lucent holds Bell Laboratories, one of the largest research and development facilities in the communications industry. Bell Labs employees have been awarded eight Nobel Prizes and the company holds over 29,000 patents. Wikipedia.
Willett R.L.,Alcatel - Lucent
Reports on Progress in Physics | Year: 2013
Experimental discovery of a quantized Hall state at 5/2 filling factor presented an enigmatic finding in an established field of study that has remained an open issue for more than twenty years. In this review we first examine the experimental requirements for observing this state and outline the initial theoretical implications and predictions. We will then follow the chronology of experimental studies over the years and present the theoretical developments as they pertain to experiments, directed at sets of issues. These topics will include theoretical and experimental examination of the spin properties at 5/2; is the state spin polarized? What properties of the higher Landau levels promote development of the 5/2 state, what other correlation effects are observed there, and what are their interactions with the 5/2 state? The 5/2 state is not a robust example of the fractional quantum Hall effect: what experimental and material developments have allowed enhancement of the effect? Theoretical developments from initial pictures have promoted the possibility that 5/2 excitations are exceptional; do they obey non-abelian statistics? The proposed experiments to determine this and their executions in various forms will be presented: this is the heart of this review. Experimental examination of the 5/2 excitations through interference measurements will be reviewed in some detail, focusing on recent results that demonstrate consistency with the picture of non-abelian charges. The implications of this in the more general physics picture is that the 5/2 excitations, shown to be non-abelian, should exhibit the properties of Majorana operators. This will be the topic of the last review section. © 2013 IOP Publishing Ltd.
Baker M.,Alcatel - Lucent
IEEE Communications Magazine | Year: 2012
LTE and LTE-Advanced have undeniably provided a major step forward in mobile communication capability, enabling mobile service provisioning to approach for the first time that available from fixed-line connections. However, market demands typically do not evolve simply in discrete steps; therefore, the future evolution of LTE-Advanced will be a story of continuous enhancement, on one hand taking advantage of the advancing capabilities of technology, while on the other aiming to keep pace with the expectations and needs of the end users. In this article, the likely directions of this continuing enhancement are discussed, and some areas where further technical advancement will be required are identified. In particular, potential measures to enhance the efficiency of spectrum utilization by joint multicell optimization, dynamic adaptation of the network to traffic characteristics and load levels, and support for new applications are highlighted. © 2012 IEEE.
Zami T.,Alcatel - Lucent
Journal of Lightwave Technology | Year: 2014
Within the frame of the WDM networks, this paper articulates and validates the benefits of elastic spectral efficiency relying upon Nyquist superchannel, assuming static or incremental traffic and optimization of the superchannel filling ratio by means of electronic intermediate traffic grooming. This assessment is reported in terms of total accepted network capacity, average number of transponders per Gb/s transmitted, and mean number of regenerators traversed per Gb/s transported. This analysis points out why these two latter parameters differ when using adaptive bit rate interfaces. It also investigates how these outcomes depend on: (i) restriction about the regeneration, (ii) forward error correction coding, (iii) practical constraints on the spectral alignment of the subcarriers within the superchannels, and (iv) uncertain knowledge of the physical network parameters. This study highlights under which conditions the elasticity of the subcarrier modulation scheme effectively complements flexible subcarrier spacing. It proposes a particular placement of regenerators keeping substantial gain of network capacity even in the case of incremental traffic that may challenge profitable allocation of elastic superchannel. © 1983-2012 IEEE.
Winzer P.J.,Alcatel - Lucent
Journal of Lightwave Technology | Year: 2013
Conventional interferometers split and recombine an optical signal after some limited optical processing in one or more of their interference paths. We study an interferometer structure that converts the signal to a different wavelength range for processing and converts it back to the original wavelength for interference. In particular, we consider intradyne conversion of the optical signal in one interferometer arm to digital electronic baseband, followed by digital electronic signal processing and subsequent electro-optic conversion, using the same laser for local oscillator and retransmitted signal. This allows for arbitrary time/frequency manipulations of an optical signal within the system's bandwidth capabilities while letting the other frequency portions of the signal pass through the system unchanged. We quantify the performance of such an opto-electronic interferometer as a subcarrier add/drop node in a digital optical communication system and study its tolerance to important practical hardware limitations. © 1983-2012 IEEE.
Winzer P.J.,Alcatel - Lucent
Journal of Lightwave Technology | Year: 2012
As 100-Gb/s coherent systems based on polarization-division multiplexed quadrature phase shift keying (PDM-QPSK), with aggregate wavelength-division multiplexed (WDM) capacities close to 10 Tb/s, are getting widely deployed, the use of high-spectral-efficiency quadrature amplitude modulation (QAM) to increase both per-channel interface rates and aggregate WDM capacities is the next evolutionary step. In this paper we review high-spectral-efficiency optical modulation formats for use in digital coherent systems. We look at fundamental as well as at technological scaling trends and highlight important trade-offs pertaining to the design and performance of coherent higher-order QAM transponders. © 1983-2012 IEEE.