Results 41 to 50 of about 134,196 (290)

Lowering backward Raman and Brillouin scattering in waveguide Raman wavelength converters

Journal of the European Optical Society-Rapid Publications, 2017
Background Liquid filled hollow core fiber Raman wavelength converters are devices enabling to red-shift the wavelength of laser beams delivered by either fixed wavelength or tunable lasers. Most of the reported converters operate in a pulsed regime with
Min Châu Phan Huy, Philippe Delaye, Gilles Pauliat, Nicolas Dubreuil, Frédéric Gérôme, Benoît Debord, Fetah Benabid, Sylvie Lebrun   +7 more
doaj   +1 more source

A new wavelength calibration for echelle spectrographs using Fabry-Perot etalons

, 2019
The study of Earth-mass extrasolar planets via the radial-velocity technique and the measurement of the potential cosmological variability of fundamental constants call for very-high-precision spectroscopy at the level of $\updelta\lambda ...
Cersullo, F., Chazelas, B., Coffinet, A., Lovis, C., Pepe, F.   +4 more
core   +1 more source

Fabry's Disease.

Internal Medicine, 1992
A 20-year-old man presented with generalized acquired anhidrosis and heat intolerance which was confirmed by a sweat test. Other clinical features included severe pain of the extremities and cutaneous angiokeratomas. On electronmicroscopy, granules specific for Fabry's disease were observed in the endothelial cells.
H, Kato, K, Sato, S, Hattori, S, Ikemoto, M, Shimizu, Y, Isogai   +5 more
openaire   +3 more sources

Type-I intermittency route to chaos in passively Q-switched Tm:YLF laser emitting at 2.3 μm [PDF]

EPJ Web of Conferences
We report on an original chaotic dynamic behaviour of a passively Q-switched 2.3-μm Thulium laser operating on the 3H4 → 3H5 transition. The experiment employs a Tm:LiYF4 laser crystal within various laser cavity configurations, involving optional ...
Dupont Hippolyte, Glasset Matthieu, Loiko Pavel, Georges Patrick, Druon Frédéric   +4 more
doaj   +1 more source

Estimation precision of degree of polarization in the presence of signal-dependent and additive Poisson noises [PDF]

Journal of the European Optical Society-Rapid Publications, 2008
We address precision of estimation of the degree of polarization (DOP) from the orthogonal state contrast image (OSCI) in the presence of both signal-dependent Poisson noise due to useful signal, and additive Poisson noise due to dark current and / or ...
Bénière Arnaud, Goudail François, Alouini Mehdi, Dolfi Daniel   +3 more
doaj   +1 more source

Role of Static Modes in Quasinormal Modes Expansions: When and How to Take Them into Account?

Mathematics, 2022
The scattering of electromagnetic waves by a resonator is determined by the excitation of the eigenmodes of the system. In the case of open resonators made of absorbing materials, the system is non-Hermitian, and the eigenmodes are quasinormal modes ...
Mondher Besbes, Christophe Sauvan
doaj   +1 more source

Polarization conversion with a photonic crystal slab [PDF]

Journal of the European Optical Society-Rapid Publications, 2008
We show that a photonic crystal slab can enable efficient polarization conversion. Two mechanisms are identified. The first mechanism relies on the anisotropy of the bulk properties of the metamaterial and is mediated by interferences.
Laroche Marine, Marquier François, Vandenbem Cédric, Greffet Jean-Jacques   +3 more
doaj   +1 more source

Optical vernier technique for in-situ measurement of the length of long Fabry-Perot cavities [PDF]

, 1998
We propose a method for in-situ measurement of the length of kilometer size Fabry-Perot cavities in laser gravitational wave detectors. The method is based on the vernier, which occurs naturally when the laser incident on the cavity has a sideband.
Abramovici A, Bosch T, Drever R, H Yamamoto, Hariharan P, Kent W, M Evans, M Rakhmanov, Moffitt F H, Siegman A E, Tsubono K, Vaziri M, Zhu Y   +12 more
core   +2 more sources

Double Helical Plasmonic Antennas

Advanced Functional Materials, EarlyView.
Plasmonic double helical antennas funnel circularly polarized light to the nanoscale, offering strong chiroptical interaction and directional light emission. Extending a single helix design tool, this study combines numerical modeling with experimental validation, revealing large, broadband dissymmetry factors in the visible range.
Aleksei Tsarapkin, Luka Zurak, Krzysztof Maćkosz, Lorenz Löffler, Victor Deinhart, Ivo Utke, Thorsten Feichtner, Katja Höflich   +7 more
wiley   +1 more source

Design of nanofibres for efficient stimulated Raman scattering in the evanescent field [PDF]

Journal of the European Optical Society-Rapid Publications, 2013
Nanofibres can be produced with diameters smaller than the wavelength of the light they guide. In this regime, the guided mode presents a strong evanescent field well adapted to the excitation of “evanescent nonlinearities”.
Shan L., Pauliat G., Vienne G., Tong L., Lebrun S.   +4 more
doaj   +1 more source