Results 21 to 30 of about 3,293,063 (304)

Dielectric resonator bandstop filters [PDF]

open access: yes, 2011
Dielectric resonators have been widely employed in wireless and satellite communication systems due to their inherently large Q allowing them to fashion low loss and narrow bandwidth filters.
Chan, Richard Kayip
core   +6 more sources

Fiber-Coupled Ultra-High-Q Microresonators for Nonlinear and Quantum Optics [PDF]

open access: yes, 2004
The ability to confine optical energy in small volumes for long periods of time is desirable for a number of applications, ranging from photonics and nonlinear optics, to fundamental studies in quantum electrodynamics.
Spillane, Sean Michael
core   +1 more source

High Efficiency Coupling Technology of Silicon Photonic Modulator and Single-Mode Optical Fiber

open access: yesGuangtongxin yanjiu, 2021
Due to the small mode field of silicon photonic chips, the large coupling loss is a road-blocker for their applications. In this work, the coupling efficiency between a silicon photonic modulator chip and a single-mode optical fiber is investigated.
Zhong-xiang TAN   +5 more
doaj   +1 more source

Dynamics of the pedestal in the recovery phase in EAST type-I ELM plasmas

open access: yesNuclear Fusion, 2023
In the Experimental Advanced Superconducting Tokamak high-confinement mode plasmas, a low-frequency n = 1 magnetic coherent mode with frequency f = 20–50 kHz and a high-frequency mode with electromagnetic characteristics (HFEM, f ∼ 280 kHz) have been ...
H. Zhou   +10 more
doaj   +1 more source

Polarization-maintaining terahertz anti-resonant fibers based on mode couplings between core and cladding

open access: yesResults in Physics, 2021
This study numerically investigated the index-induced mode coupling between the fundamental mode in core and the fundamental mode in cladding tubes in THz anti-resonant fibers (ARFs), and then, this index-induced mode coupling was applied for designing ...
Shuai Sun   +8 more
doaj   +1 more source

Negative index and mode coupling in all-dielectric metamaterials at terahertz frequencies

open access: yesEPJ Applied Metamaterials, 2018
We elucidate the role of the mode coupling of the Mie resonances in all-dielectric metamaterials to ensure a negative effective index at terahertz frequencies. We perform a study as a function of the lattice period and of the frequency overlapping of the
Akmansoy Eric, Marcellin Simon
doaj   +1 more source

A Refractive Index Sensor Based on the Resonant Coupling to Cladding Modes in a Fiber Loop

open access: yesSensors, 2013
We report an easy-to-build, compact, and low-cost optical fiber refractive index sensor. It consists of a single fiber loop whose transmission spectra exhibit a series of notches produced by the resonant coupling between the fundamental mode and the ...
José Luis Cruz   +6 more
doaj   +1 more source

A thermodynamically consistent derivation of a frictional-damage cohesive-zone model with different mode i and mode II fracture energies [PDF]

open access: yes, 2015
The present paper deals with the derivation of an interface model characterized by macroscopic fracture energies which are different in modes I and II, the macroscopic fracture energy being the total energy dissipated per unit of fracture area.
Serpieri, R   +9 more
core   +1 more source

Mode-coupling effects in an optically-injected dual-wavelength laser

open access: yes, 2022
Lasers designed to emit at multiple and controllable modes, or multi-wavelength lasers, have the potential to become key building blocks for future microwave photonic technologies.
Pablo Marin-Palomo (14365968)   +2 more
core   +1 more source

Thermometry based on Whispering Gallery Mode resonators [PDF]

open access: yes, 2012
Whispering gallery (WG) mode resonators were studied since 1980s for precision clock oscillators and for cavity quantum electrodynamics studies. They are a kind of stable, high Q, microwave resonators where a symmetric dielectric medium, such as a ...
Yu, Lili
core   +1 more source

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