Results 31 to 40 of about 491,257 (266)

EVALUATION METHOD FOR PARASITIC EFFECTS OF THE ELECTRO-OPTICAL MODULATOR IN A FIBER OPTIC GYROSCOPE [PDF]

open access: yesНаучно-технический вестник информационных технологий, механики и оптики, 2016
Subject of Research.The paper proposes an original method for studying the parasitic effects in the electro-optic modulator of the fiber optic gyroscope. Proposed method is based on the usage of a special waveform phase modulation signal. Method.
S. A. Volkovskiy   +4 more
doaj   +1 more source

Measuring the Reflection Matrix of a Rough Surface

open access: yesApplied Sciences, 2017
Phase modulation methods for imaging around corners with reflectively scattered light required illumination of the occluded scene with a light source either in the scene or with direct line of sight to the scene. The RM (reflection matrix) allows control
Kenneth Burgi   +3 more
doaj   +1 more source

Reflective Inverse Diffusion

open access: yesApplied Sciences, 2016
Phase front modulation was previously used to refocus light after transmission through scattering media. This process has been adapted here to work in reflection.
Kenneth Burgi   +3 more
doaj   +1 more source

Performance Optimization of SNR and SFDR in RoF Link for the Next Generation Networks

open access: yesThe Journal of Engineering
A radio frequency over fibre (RFoF) or radio over fibre is a versatile technology, in which light is modulated with radio frequency signal and an optical fibre link is used as a medium to transmit it.
Balram Tamrakar   +10 more
doaj   +1 more source

Rotating vortex imaging implemented by a quantized spiral phase modulation [PDF]

open access: yesJournal of the European Optical Society-Rapid Publications, 2013
We demonstrate both theoretically and experimentally that a spiral mask with a finite number of discrete phase levels allows a defocusing induced rotation of the point spread function in the vortex imaging.
Baránek M., Bouchal Z.
doaj   +1 more source

Advances in nonlinear spectroscopy using phase modulated light fields: prospective applications in perturbative and non-perturbative regimes

open access: yesAdvances in Physics: X, 2022
Since its first implementation in 2006, in fluorescence detected Fourier transform excitation spectroscopy of rubidium atoms, phase modulation is being increasingly used in nonlinear spectroscopy.
Khadga J. Karki, Marcelo F. Ciappina
doaj   +1 more source

Upacicalcet: A Novel Intravenous Calcimimetic Agent for Patients Undergoing Hemodialysis With Secondary Hyperparathyroidism

open access: yesTherapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Secondary hyperparathyroidism (SHPT) is a common complication in patients receiving maintenance dialysis, driven by calcium and phosphate metabolism disturbances. Calcimimetics are central to the management of SHPT by enhancing calcium‐sensing receptor sensitivity and reducing parathyroid hormone secretion.
Fumihiko Koiwa   +3 more
wiley   +1 more source

Power and signal dual modulation‐based bidirectional communication between intrinsically safe converters

open access: yesIET Power Electronics
In harsh operating environments such as mines and gas stations, intrinsically safe power converters are required for electronics devices. Reliable communication is the key ensuring good performance of monitoring and coordinated control for intrinsically ...
Tan Wang   +4 more
doaj   +1 more source

Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM

open access: yesFEBS Letters, EarlyView.
Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley   +1 more source

Numerical Analysis of Integrated Fabry–Perot Interferometers Based on Four Core Fiber With a Helical Phase Microdisk

open access: yesIEEE Photonics Journal
The integrated Fabry-Perot (FP) interferometers structure based on four core fiber (FCF) and a helical phase-modulation microdisk (HPMD) structure is proposed.
Yuhan Geng, Shengnan Wu, Sailing He
doaj   +1 more source

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