Results 111 to 120 of about 303,375 (325)

Development of High‐Performance Multilayer Monochromators

open access: yesAdvanced Optical Materials, EarlyView.
Detailed insights into the optical and multilayer design of Double Multilayer Monochromators (DMM) are presented and fully characterized, including key optimization strategies and solutions to fabrication challenges. By integrating in‐house Ion Beam Figuring and a high uniformity multilayer coating process, the developed DMMs achieve high reflectivity,
Wadwan Singhapong   +11 more
wiley   +1 more source

Label‐Free Characterization of Lipid Interfaces Using Plasmonic Gold Nanorods as Optically Active Nanosensors

open access: yesAdvanced Optical Materials, EarlyView.
A label‐free plasmonic nanosensor platform is presented based on single gold nanorods for the nanometric characterization of lipid interfaces. By correlating optical scattering signals with membrane packing and refractive index, this approach enables the detection of gel‐to‐fluid transitions in lipid interfaces, offering a robust, high‐resolution ...
Alfredo Casasnovas‐Melián   +12 more
wiley   +1 more source

Application of Microwave Remote Sensing to Dynamic Testing of Stay-Cables

open access: yesRemote Sensing, 2009
Recent advances in radar techniques and systems have favoured the development of microwave interferometers, suitable for the non-contact vibration monitoring of large structures.
Carmelo Gentile
doaj   +1 more source

2D Spatially-Resolved Depth-Section Microfluidic Flow Velocimetry Using Dual Beam OCT

open access: yesMicromachines, 2020
A dual beam optical coherence tomography (OCT) instrument has been developed for flow measurement that offers advantages over microscope derived imaging techniques.
Jonathan M. Hallam   +3 more
doaj   +1 more source

Processing Ultrasonic Data by Coda Wave Interferometry to Monitor Load Tests of Concrete Beams

open access: yesItalian National Conference on Sensors, 2018
Ultrasonic transmission measurements have been used for decades to monitor concrete elements, mostly on a laboratory scale. Recently, coda wave interferometry (CWI), a technique adapted from seismology, was introduced to civil engineering experiments. It
E. Niederleithinger   +3 more
semanticscholar   +1 more source

Generalized Heterodyne Interferometry in Kerr Materials

open access: yesAdvanced Photonics Research, EarlyView.
Interferometry, combined with heterodyne detection, enables simultaneous measurement of light amplitude and phase. This work applies these methods to study nonlinear phase shifts from the optical Kerr effect during laser pulse propagation. Results show the nonlinear index is straightforward to retrieve at low phases, but at higher powers, pulse shape ...
Arnaud Rogemont   +3 more
wiley   +1 more source

Speckle interferometry [PDF]

open access: yes, 1999
We have presented the basic mathematical treatment of interferometry in the optical domain. Its applications in astronomical observations using both the single aperture, as well as the diluted apertures are described in detail.
Saha, S. K.
core   +2 more sources

A self-calibration approach for optical long baseline interferometry imaging

open access: yes, 2008
Current optical interferometers are affected by unknown turbulent phases on each telescope. In the field of radio-interferometry, the self-calibration technique is a powerful tool to process interferometric data with missing phase information. This paper
Benson   +20 more
core   +1 more source

Numerical and Experimental Methods for Estimating the Propagation Loss in Microphotonic Waveguides

open access: yesAdvanced Photonics Research, EarlyView.
Finite‐element finite‐difference time domain, eigenmode‐expansion, and volume‐current simulations are benchmarked against cut‐back, ring‐resonator, and OFDR measurements to quantify waveguide propagation loss in integrated photonic circuits. Scattering, absorption, leakage, and back‐reflection contributions are dissected; error sources are ranked; and ...
Francesco Dell’Olio   +4 more
wiley   +1 more source

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