Results 101 to 110 of about 80,084 (309)

Linewidth Measurement of a Narrow-Linewidth Laser: Principles, Methods, and Systems

Sensors
Narrow-linewidth lasers mainly depend on the development of advanced laser linewidth measurement methods for related technological progress as key devices in satellite laser communications, precision measurements, ultra-high-speed optical communications,
Jia-Qi Chen, Chao Chen, Jing-Jing Sun, Jian-Wei Zhang, Zhao-Hui Liu, Li Qin, Yong-Qiang Ning, Li-Jun Wang   +7 more
doaj   +1 more source

Phase Noise Cancellation in Coherent Communication Systems Using a Radio Frequency Pilot Tone

Applied Sciences, 2019
Long-haul optical fiber communication employing digital signal processing (DSP)-based dispersion compensation can be distorted by the phenomenon of equalization-enhanced phase noise (EEPN), due to the reciprocities between the dispersion compensation ...
Tianhua Xu, Cenqin Jin, Shuqing Zhang, Gunnar Jacobsen, Sergei Popov, Mark Leeson, Tiegen Liu   +6 more
doaj   +1 more source

Thermally Pre‐Formed Reconfigurable Resistive Random‐Access Memory Crossbar Arrays: A Dual‐Mode Platform for Robust Physically Unclonable Functions and In‐Memory Computing

Advanced Functional Materials, EarlyView.
A reconfigurable RRAM platform utilizing thermally pre‐formed filaments (TPFs) is developed to realize robust hardware security. By exploiting the thermodynamic stochasticity of TPFs, exceptionally reliable physically unclonable functions (PUFs) are achieved.
Seongbin Kwon, Taewon Lee, Dohyeong Kim, Sungmin Hwang, Sungjoon Kim   +4 more
wiley   +1 more source

Frequency-modulated continuous-wave laser ranging beyond the limits of bandwidth and phase noise

APL Photonics
Frequency-modulated continuous-wave (FMCW) laser ranging typically applies an interferometer and linear frequency-modulated (LFM) signals to measure the distance, in which precision and resolution are limited by the phase noise of laser and the bandwidth
Xiuyuan Sun, Zhongyang Xu, Hangtian Lu, Qiyue Yu, Kai Wang, Shilong Pan   +5 more
doaj   +1 more source

Quantum-enhanced laser phase noise filter

Optica
The direct realization of a quantum-enhanced phase noise filter has remained a major challenge. Conventional techniques are not only plagued by substantial technical noise but also fundamentally constrained by inherent quantum penalty, precluding their direct application in quantum-enhanced noise filtering.
Ruixin Li, Nanjing Jiao, Bingnan An, Yajun Wang, Shaoping Shi, Long Tian, Wei Li, Yaohui Zheng   +7 more
openaire   +2 more sources

Merging of optoelectronic techniques for microwave signal generation [PDF]

, 2007
This paper describes some recent evolutions about optical generation of microwave signals. Among these, multiloop ring oscillator and harmonic generation allow both rise in frequency and wide tunability. Besides, using microresonators and optical sources
Le Kernec, Arnaud, A. Le Kernec, M. Varon, Mollier, Jean-Claude, Varón-Durán, Margarita, J.-C. Mollier   +5 more
core   +1 more source

Giant Magnetic Coercivity Driven by Spin‐Bag Ferromagnetism in Epitaxial Sr3YCo4O10+δ Films with Engineered 2D Oxygen Vacancy Ordering

Advanced Functional Materials, EarlyView.
A giant magnetic coercivity and a vertical shift of hysteresis loops are demonstrated in Sr3YCo4O10+δ epitaxial films. The hard magnetic behavior originates from ferromagnetic spin bags stabilized within a long‐range ordered oxygen‐vacancy structure.
Yanbin Chen, Roger Guzman, Xiaomin Jia, Jialu Wu, Xing Xu, Li Sun, Jinbo Pan, Shixuan Du, Myung‐Hwan Whangbo, Wu Zhou, Jing Ma, Ce‐wen Nan, Chonglin Chen   +12 more
wiley   +1 more source

Coherent Polariton Laser

Physical Review X, 2016
The semiconductor polariton laser promises a new source of coherent light, which, compared to conventional semiconductor photon lasers, has input-energy threshold orders of magnitude lower.
Seonghoon Kim, Bo Zhang, Zhaorong Wang, Julian Fischer, Sebastian Brodbeck, Martin Kamp, Christian Schneider, Sven Höfling, Hui Deng   +8 more
doaj   +1 more source

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

, 2019
Video ArticleThe aim of this article is to visually demonstrate the utilization of an interferometric method for encoding complex fields associated with coherent laser radiation.
Carbonell Leal, Miguel, Mendoza-Yero, Omel   +1 more
core   +1 more source

2.49 GHz low phase-noise optoelectronic oscillator using 1.55μm VCSEL for avionics and aerospace applications [PDF]

, 2008
We present here a 1.55 μm single mode Vertical-Cavity Surface-Emitting Laser (VCSEL) based low phase-noise ring optoelectronic (OEO) oscillator operating at 2.49 GHz for aerospace, avionics and embedded systems applications.
Jean-Claude Mollier, Margarita Varon, Alexandre Bacou, Ahmad Hayat, Bacou, Alexandre, Rissons, Angélique, Mollier, Jean-Claude, Varón-Durán, Margarita, Hayat, Ahmad, Angelique Rissons   +9 more
core   +1 more source