Use of Dynamical Undulator Mechanism to Produce Short Wavelength Radiation in Volume FEL (VFEL) [PDF]
, 2002 VFEL lasing in system with dynamical undulator is described. In this system radiation of long wavelength creates the undulator for lasing on shorter wavelength. Two diffraction gratings with different spatial periods form VFEL resonator. The grating with longer period pumps the resonator with long wavelength radiation to provide necessary amplitude of ...
Baryshevsky +5 more
arxiv +3 more sources
Optical Behaviour of Caffeine Mixed Perovskite Photoanode for Photovoltaic Application [PDF]
Physics Access, 2022 Halide perovskites such as methylammonium lead triiodide (CH3NH3PbI3) are attracting attention as energy-efficient light absorber materials for photovoltaic applications owing to their solution processing-power, tunable bandgap, strong absorption ...
Nicodemus Kure +4 more
doaj +1 more source
Performance analysis of Strain sensor based on Fiber Bragg Grating [PDF]
ITM Web of Conferences, 2020 A fiber Bragg grating can be worked as reflector, it is constructed in a short section of optical fiber that reflects light of specific wavelength and allow to pass remaining wavelengths. This is possible by creating a periodic change in refractive index
More Aniket Shivram +3 more
doaj +1 more source
SEM microscopic analysis of the labial tooth surfaces after the bleaching procedure done by Epic Biolase diode laser 940 nm [PDF]
Romanian Journal of Stomatology, 2023 Dental bleaching is a common procedure, requested and accepted by patients with aesthetic requirements. The SEM images were taken at different degrees of magnification, always looking for cracks, porosities, or other changes at this level, which could be
Andreea Dana Tudose +5 more
doaj +1 more source
Er:YAG and Diode Lasers in Treatment of Peri-Implantitis–A Case Report [PDF]
Journal of Clinical and Diagnostic Research, 2019 One of the leading causes of dental implant loss in the present time is peri-implantitis. This paper describes a clinical case of peri-implantitis treatment using Er:YAG and a 980-nm diode laser.
Alexandros Nikita
doaj +1 more source
Palladium Diselenide Long-Wavelength Infrared Photodetector with High Sensitivity and Stability. [PDF]
ACS Nano, 2019 A long-wavelength infrared photodetector based on two-dimensional materials working at room temperature would have wide applications in many aspects in remote sensing, thermal imaging, biomedical optics, and medical imaging.
M. Long +13 more
semanticscholar +1 more source
Design of Zero Dispersion Optical Fiber at Wavelength 1.3 m [PDF]
مجلة التربية والعلم, 2018 In this article, an optical fiber was designed with zero- dispersion at wavelength of (1.3 m). The design took into consideration many factors of the fiber, such as; fiber cross- section, fiber material, refractive index.
R. S. Habeb
doaj +1 more source
Ultrahigh-efficiency wavelength conversion in nanophotonic periodically poled lithium niobate waveguides [PDF]
Optica, 2018 Periodically poled lithium niobate (PPLN) waveguide is a powerful platform for efficient wavelength conversion. Conventional PPLN converters however typically require long device lengths and high pump powers due to the limited nonlinear interaction ...
Cheng Wang +7 more
semanticscholar +1 more source
Development of Force Sensor System Based on Tri-Axial Fiber Bragg Grating with Flexure Structure
Sensors, 2021 Fiber Bragg grating (FBG) sensors have an advantage over optical sensors in that they are lightweight, easy to terminate, and have a high flexibility and a low cost.
Dongjoo Shin +4 more
doaj +1 more source
INCREASING THE LEVEL OF PHOTO BIOLOGICAL SAFETY OF THE EMISSION SPECTRUM OF AN LED LIGHT SOURCE
Сучасний стан наукових досліджень та технологій в промисловості, 2020 The subject of research is the emission spectra of light sources based on LED structures. The purpose of the work is to formulate proposals to improve the photo biological safety of LED lighting systems.
Igor Bondarenko +3 more
doaj +1 more source