Results 101 to 110 of about 49,753 (282)
The Anatomical Record, EarlyView.Abstract Hadrosaurid dinosaurs are generally regarded as “crested” or “non‐crested” depending on the presence or absence of a bony cranial crest. At least one supposedly “non‐crested” hadrosaur is known to have possessed a soft tissue cranial crest (or comb), based on an exceptionally preserved “mummified” specimen. Here we redescribe this specimen and
Henry S. Sharpe +4 more
wiley +1 more source
Gaussian-shaped Optical Frequency Comb Generation for Microwave Photonic Filtering [PDF]
, 2011 Using only electro-optic modulators, we generate a 41-line 10-GHz Gaussian-shaped optical frequency comb. We use this comb to demonstrate apodized microwave photonic filters with greater than 43-dB sidelobe suppression without the need for a pulse shaper.
Hamidi, Ehsan +6 more
core +1 more source
Absolute frequency measurement of the magnesium intercombination transition $^1S_0 \to ^3P_1$
, 2007 We report on a frequency measurement of the $(3s^2)^1S_0\to(3s3p)^3P_1$ clock transition of $^{24}$Mg on a thermal atomic beam. The intercombination transition has been referenced to a portable primary Cs frequency standard with the help of a femtosecond
André Pape +17 more
core +1 more source
Computational Electro-optic Frequency Comb Spectroscopy
Journal of Lightwave TechnologyComputational techniques have gained significant traction in photonics, enabling the co-design of hardware and data processing algorithms to drastically simplify optical system architectures and improve their performance. However, their application in optical frequency comb spectroscopy remains considerably underexplored.
J.J. Navarro-Alventosa +2 more
openaire +2 more sources
Loss, persistence and reversal of phenotypic traits
Biological Reviews, EarlyView.ABSTRACT The irreversibility of complex trait loss has long been a tenet of evolutionary biology. However, this idea is increasingly at odds with the numerous documented exceptions across the Tree of Life. We synthesise this growing body of evidence across a diverse array of taxa and traits, exploring the evolutionary conditions that enable ...
Giobbe Forni +4 more
wiley +1 more source
Dual-frequency comb in fiber Fabry–Perot resonator
APL PhotonicsThis paper presents a novel approach to dual-frequency comb generation utilizing a single fiber Fabry–Perot resonator, advancing the implementation of these sources in fiber-based systems. Dual-comb applications such as spectroscopy, ranging, and imaging,
Thomas Bunel +5 more
doaj +1 more source
Silicon-based monolithic optical frequency comb source
Optics Express, 2011 Recently developed techniques for generating precisely equidistant optical frequencies over broad wavelength ranges are revolutionizing precision physical measurement [1-3]. These frequency "combs" are produced primarily using relatively large, ultrafast laser systems.
Foster, Mark A. +5 more
openaire +3 more sources
Institutional Ownership and Corporate Sustainability Performance—A Meta‐Analysis
Business Strategy and the Environment, EarlyView.ABSTRACT This study investigates the relationship between institutional ownership (IO) and corporate sustainability performance (SP), addressing inconsistent findings in prior research and clarifying the boundary conditions of this relationship by testing a defined set of potential moderators.
Hans Henrik Scherer +2 more
wiley +1 more source
Photonic chip-based soliton frequency combs covering the biological imaging window
Nature Communications, 2018 Dissipative Kerr solitons in optical microresonators provide excellent optical frequency comb sources for precision metrology and imaging techniques. Here, Karpov et al.
Maxim Karpov +4 more
doaj +1 more source
IEEE Photonics Journal, 2019 We propose and experimentally demonstrate a photonic millimeter-wave frequency divider based on a super-harmonic injection-locked optoelectronic oscillator (OEO) and an optical frequency comb.
Yongchi Xu +7 more
doaj +1 more source