Results 31 to 40 of about 828,607 (304)
Crystals, 2021 We present a design methodology for hybrid lasers to realise mode-hop free operation by controlling the cavity mode spacing. In this study, a compact hybrid photonic crystal laser (H-PhCL) was employed which allowed a reduction of the Fabry–Perot length ...
Praveen K. J. Singaravelu +5 more
doaj +1 more source
Journal of Advanced Mechanical Design, Systems, and ManufacturingAn investigation is carried out through experiments and numerical calculations for the improvement of the resolution of measuring the pitch deviation of a diffraction scale grating with the diffracted beams.
Tomoki KITAZUME, Yuki SHIMIZU
doaj +1 more source
Upconversion of optical signals with multi-longitudinal-mode pump lasers
, 2012 Multi-longitudinal-mode lasers have been believed to be good candidates as pump sources for optical frequency conversion. However, we present a semi-classical model for frequency conversion of optical signals with a multimode pump laser, which shows that
G.-L. Shentu +6 more
core +1 more source
Residual strain measurement based on longitudinal to shear wave velocity ratio with a dual-mode EMAT
Frontiers in Materials, 2023 In this paper, a new and noncontact method with measuring longitudinal to shear wave velocity ratio by a dual-mode electromagnetic acoustic transducer is proposed for residual strain measurement in a metal structure without knowing its thickness. Firstly,
Geng Dang +4 more
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Single longitudinal mode fiber ring laser [PDF]
Optics & Laser Technology, 2018 In this work, a dual-wavelength fiber ring laser working on the SLM regime is proposed and experimentally verified. A proof-of-concept device has been tested employing high precision small-sized SLM fiber lasers to complement the feedback produced by a passive FBG.
Rodríguez Cobo, Luis +4 more
openaire +2 more sources
Fourth-order perturbative equations in Lagrangian perturbation theory for a cosmological dust fluid
, 2012 We have derived fourth-order perturbative equations in Lagrangian perturbation theory for a cosmological dust fluid. These equations are derived under the supposition of Newtonian cosmology in the Friedmann-Lema\^{i}tre-Robertson-Walker Universe model ...
Tatekawa, Takayuki
core +1 more source
Modeling the Converse Magnetoelectric Effect in the Low-Frequency Range
Sensors, 2023 This article is devoted to the theory of the converse magnetoelectric (CME) effect for the longitudinal, bending, longitudinal-shear, and torsional resonance modes and its quasi-static regime.
Mirza Bichurin +6 more
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Combining Data Collection Modes in Longitudinal Studies
, 2023 AbstractTechnological advances over the past two decades have substantially changed the range of data collection methods available to survey researchers. Web-based surveys have gained in popularity as increasing Internet penetration rates improve their coverage potential for general population research.
Roberts, Caroline, Voorpostel, Marieke
openaire +2 more sources
Dynamics and Heating of the Magnetic Network on the Sun: Efficiency of mode transformation
, 2004 We aim to identify the physical processes which occur in the magnetic network of the chromosphere and which contribute to its dynamics and heating. Specifically, we study the propagation of transverse (kink) MHD waves which are impulsively excited in ...
Alicki +34 more
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Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system
FEBS Letters, EarlyView.Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley +1 more source