Results 31 to 40 of about 140,378 (296)

Interference effects in second-harmonic generation within an optical cavity [PDF]

open access: yes, 1984
An experiment is described that investigates certain interference effects for second-harmonic generation within a resonant cavity. By employing a noncollinear geometry, the phases of two fundamental beams from a frequency-stabilized dye laser can be ...
Kimble, H. J., Wu, Ling-An
core   +1 more source

DETECTION OF A HARMONIC SIGNAL AGAINST THE BACKGROUND OF A NONSTATIONARY GAUSSIANINTERFERENCE WITH COMPLEX SPECTRUM

open access: yesInformation and Telecommunication Sciences, 2021
Background. Modern radar stations for various purposes operate in the conditions of interference created by the imprints of the radar signal from the background surface, from metrological formations (precipitation, clouds, etc.) and artificial radiation ...
Ігор Прокопенко   +3 more
doaj   +1 more source

Removing non-stationary, non-harmonic external interference from gravitational wave interferometer data [PDF]

open access: yes, 1999
We describe a procedure to identify and remove a class of non-stationary and non-harmonic interference lines from gravitational wave interferometer data.
A. Abramovic   +19 more
core   +3 more sources

Influence of Initial Phase Modulation on the Sensitivity of the Optical Fiber Sagnac Acoustic Emission Sensor

open access: yesApplied Sciences, 2019
Improving the phase sensitivity of the optical fiber Sagnac sensor is very important for accurately detecting weak signals of acoustic emission. Theoretical analysis shows that the initial phase of the sensor is π under ideal conditions, and the ...
Zhuming Cheng   +4 more
doaj   +1 more source

The interference effect of below-threshold harmonics in O2

open access: yes上海师范大学学报. 自然科学版, 2019
In this paper,the non-perturbative quantum electrodynamics(QED) theory was developed to study the high-order harmonic generation from the molecules irradiated by the strong laser field.The relationship between the harmonics with energy below the ...
HONG Yongpei, ZHANG Jingtao
doaj   +1 more source

Suppression of common-mode voltage in a PWM rectifier/inverter system [PDF]

open access: yes, 2001
This paper proposes a PWM rectifier/inverter system capable of suppressing not only supply harmonic currents but also electromagnetic interference (EMI).
Akagi, Hirofumi, Ogasawara, Satoshi
core   +1 more source

Aging monitoring and fault positioning for zinc oxide surge arresters based on the fifth harmonic of the leakage current

open access: yesFrontiers in Physics
Current techniques for aging monitoring and fault positioning for zinc oxide surge arresters usually use the third harmonic of the leakage resistive current.
Yongling Lu   +6 more
doaj   +1 more source

Controlling the Interference of Multiple Molecular Orbitals in High-Harmonic Generation [PDF]

open access: yesPhysical Review Letters, 2010
We demonstrate a new method to investigate the origin of spectral structures in high-harmonic generation. We report detailed measurements of high-harmonic spectra in aligned nitrogen and carbon dioxide molecules. Varying the wavelength and intensity of the generating laser field, we show that the minimum in aligned N2 molecules is nearly unaffected ...
Worner, H. J.   +4 more
openaire   +3 more sources

European Standard Clinical Practice Guideline and EXPeRT Recommendations for the Diagnosis and Management of Gastroenteropancreatic Neuroendocrine Neoplasms in Children and Adolescents

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Pediatric gastroenteropancreatic neuroendocrine neoplasms (GEP‐NENs) are extremely rare and clinically heterogeneous. Management has largely been extrapolated from adult practice. This European Standard Clinical Practice Guideline (ESCP), developed by the EXPeRT network in collaboration with adult NEN experts, provides (adult) evidence ...
Michaela Kuhlen   +23 more
wiley   +1 more source

Interference-Induced Phenomena in High-Order Harmonic Generation from Bulk Solids

open access: yesApplied Sciences, 2019
We consider a quantum mechanical model for the high-order harmonic generation in bulk solids. The bandgap is assumed to be considerably larger than the exciting photon energy.
Viktor Szaszkó-Bogár   +3 more
doaj   +1 more source

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