Results 41 to 50 of about 1,237,711 (248)
Measuring the Reflection Matrix of a Rough Surface
Applied 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
Rotating vortex imaging implemented by a quantized spiral phase modulation [PDF]
Journal 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
On the Incommensurate Phase in Modulated Heisenberg Chains
, 1998 Using the density matrix renormalization group method (DMRG) we calculate the magnetization of frustrated S=1/2 Heisenberg chains for various modulation patterns of the nearest neighbour coupling: commensurate, incommensurate with sinusoidal modulation ...
Bouzerar, G. +3 more
core +1 more source
Applied 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
Laser Self-Mixing Interferometer Based on Multiple Reflections and Phase-Modulation Technique
Photonics, 2022 An improved method combining multiple reflections with the phase-modulation technique (MR-PM) is proposed to construct a self-mixing interferometer with high accuracy.
Xiulin Wang +4 more
doaj +1 more source
Study of an electro-optic modulator capable of generating simultaneous amplitude and phase modulations [PDF]
, 2003 We report on the analysis and prototype-characterization of a dual-electrode electro-optic modulator that can generate both amplitude and phase modulations with a selectable relative phase, termed a universally tunable modulator (UTM).
Bowen +12 more
core +2 more sources
IET Power ElectronicsIn 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
IEEE Photonics Journal, 2021 We investigate the origin of line-shape induced enhancement of stimulated Brillouin scattering (SBS) in narrow linewidth, noise broadened, high-power fiber lasers.
B. S. Vikram +3 more
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Induced soliton ejection from a continuous-wave source waveguided by an optical pulse-soliton train
, 2010 It has been established for some time that high-power pump can trap a probe beam of lower intensity that is simultaneously propagating in a Kerr-type optical medium, inducing a focusing of the probe with the emergence of modes displaying solitonic ...
Dikande, Alain M.
core +1 more source
Cross-phase modulation imaging [PDF]
Optics Letters, 2012 We demonstrate a cross-phase modulation measurement technique based on the sensitive detection of modulation transfer in a pump-probe setup. By modulating the amplitude of the pump beam and spectrally analyzing the probe beam, we achieve a rapid, background-free measurement of nonlinear phase modulation using power levels acceptable in biological ...
Prathyush Samineni +4 more
openaire +3 more sources