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.

/pdf/science-and-technology-roadmap-for-graphene-related-two-4q9m7czlkc.pdf

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

Information Theory and Reliable Communication

This paper will discuss the recently developed integrated platform: AlGaAs-on- insulator and its broad range of nonlinear applications. Recent demonstrations of broadband optical signal processing and efficient frequency comb generations in this platform will be reviewed.

An Ultra-Efficient Nonlinear Planar Integrated Platform for Optical Signal Processing and Generation

We demonstrate simultaneous OTDM demultiplexing of all 16-channels for 160-Gbit/s DPSK and 320-Gbit/s DQPSK signals based on complete OFT. Furthermore, numerical simulations show promising results for extending the proposed technique to spectrally efficient Nyquist-OTDM.

/pdf/simultaneous-all-channel-otdm-demultiplexing-based-on-1vmeu4o6ad.pdf

Simultaneous all-channel OTDM demultiplexing based on complete optical Fourier transformation

Error-free 20-Gb/s directly-modulated transmission is achieved by enhancing the dispersion tolerance of a III-V/SOI DFB laser with a silicon micro-ring resonator. Low (∼0.4 dB) penalty compared to back-to-back without ring is demonstrated after 5-km SSMF.

Error-free dispersion-uncompensated transmission at 20 Gb/s over SSMF using a hybrid III-V/SOI DML with MRR filtering

We experimentally demonstrate lens-free photonic-wireless transmission in the W-band using a monolithically integrated dual-DFB laser, which is injection-locked by a frequency comb to generate two 90-GHz-spacing phase-stabilized carriers and modulated with a 40-Gbit/s PAM-4 signal.

Integrated Dual-DFB Laser Chip-based PAM-4 Photonic-Wireless Transmission in W-band

https://onlinelibrary.wiley.com/doi/pdf/10.1002/lpor.201870054

Integrated Nonlinear Optics: Ultra‐Efficient and Broadband Nonlinear AlGaAs‐on‐Insulator Chip for Low‐Power Optical Signal Processing (Laser Photonics Rev. 12(12)/2018)

Leif Katsuo Oxenløwe

Papers

An Ultra-Efficient Nonlinear Planar Integrated Platform for Optical Signal Processing and Generation

Simultaneous all-channel OTDM demultiplexing based on complete optical Fourier transformation

Error-free dispersion-uncompensated transmission at 20 Gb/s over SSMF using a hybrid III-V/SOI DML with MRR filtering

Integrated Dual-DFB Laser Chip-based PAM-4 Photonic-Wireless Transmission in W-band

Integrated Nonlinear Optics: Ultra‐Efficient and Broadband Nonlinear AlGaAs‐on‐Insulator Chip for Low‐Power Optical Signal Processing (Laser Photonics Rev. 12(12)/2018)