There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality.

Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

I and i

다중혈관 관상동맥 환자에서 y-문합을 이용하여 양쪽 내흉동맥만을 사용한 우회술의 조기 성적

[신간의 별자리x] 우리/미술, 그리고 ‘슬픔의 박물관’

We present the science and technology roadmap for graphene, related two-dimensional crystals, and hybrid systems, targeting an evolution in technology, that might lead to impacts and benefits reaching into most areas of society. This roadmap was developed within the framework of the European Graphene Flagship and outlines the main targets and research areas as best understood at the start of this ambitious project. We provide an overview of the key aspects of graphene and related materials (GRMs), ranging from fundamental research challenges to a variety of applications in a large number of sectors, highlighting the steps necessary to take GRMs from a state of raw potential to a point where they might revolutionize multiple industries. We also define an extensive list of acronyms in an effort to standardize the nomenclature in this emerging field.

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Science and technology roadmap for graphene, related two-dimensional crystals, and hybrid systems

Information Theory and Reliable Communication

Optical time-division multiplexing (OTDM) is an attractive technique for increasing the capacity of optical transmission systems. 320 Gbit/s single-channel and single-polarization error-free transmission over continuous spans of either 80 km SMF or 77 km NZDSF are realized.

/pdf/320-gb-s-single-polarization-otdm-transmission-over-80-km-246u7hhzmb.pdf

320 Gb/s single-polarization OTDM transmission over 80 km standard transmission fiber

We propose a new OLT transmitter for WDM-PON based on optical Fourier transformation of a single-source TDM-PON signal to WDM-PON signals. We demonstrate flexible bit rates (10×1-to-64×2Gb/s) and 40×1Gb/s WDM-PON record unamplified downstream transmission reach of 150 km.

Highly Flexible WDM PON System with a Single TDM Time Lens Source Enabling Record 150 km Downstream Reach

Silicon micro-ring resonators (MRRs) are compact and versatile devices whose periodic frequency response can be exploited for a wide range of applications. In this paper, we review our recent work on linear all-optical signal processing applications using silicon MRRs as passive filters. We focus on applications such as modulation format conversion, differential phase-shift keying (DPSK) demodulation, modulation speed enhancement of directly modulated lasers (DMLs), and monocycle pulse generation. The possibility to implement polarization diversity circuits, which reduce the polarization dependence of standard silicon MRRs, is illustrated on the particular example of DPSK demodulation.

Leif Katsuo Oxenløwe

Papers

320 Gb/s single-polarization OTDM transmission over 80 km standard transmission fiber

Highly Flexible WDM PON System with a Single TDM Time Lens Source Enabling Record 150 km Downstream Reach

Linear all-optical signal processing using silicon micro-ring resonators

DWDM Transmission at Ultra-High Channel Bitrates: European TOPRATE Project View

A photonic crystal fibre used as a 106 to 10Gb/s demultiplexer