Results 51 to 60 of about 8,929 (287)
Waveguide Characteristics Near the Second Bragg Condition
IEEE Access, 2022 We show that in an optical waveguide with no material losses at wavelengths near the second-order Bragg condition, there exists two pairs of modes. One pair has identical propagation constants but have different attenuation coefficients, while a second ...
Jerome K. Butler +2 more
doaj +1 more source
Assessment of lithographic process variation effects in InGaAsP annular Bragg resonator lasers [PDF]
, 2004 Optical microresonators based on an annular geometry of radial Bragg reflectors have been designed and fabricated by electron-beam lithography, reactive ion etching, and an epitaxial transfer process. Unlike conventional ring resonators that are based on
DeRose, Guy A. +4 more
core +1 more source
Applied Sciences, 2019 High-efficiency and high-power operation have been demonstrated for blue GaN-based vertical-cavity surface-emitting lasers (VCSELs) with AlInN/GaN distributed Bragg reflectors.
Masaru Kuramoto +6 more
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Design of 1D photonic crystals for colorimetric and ratiometric refractive index sensing
Optical Materials: X, 2020 Photonic crystals can be employed effectively as simple and low-cost colorimetric sensors for monitoring variation in the environmental refractive index.
Simone Normani +4 more
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ARO-The Scientific Journal of Koya University, 2023 Refractive index (RI) can be used to identify a particular substance and determine its purity and concentration. The RI of glucose solution with various concentrations can be determined using a distributed Bragg reflective (DBR) device containing a ...
Khalid N. Sediq +3 more
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Multiwavelength distributed Bragg reflector fibre laser
Electronics Letters, 2006 A short-cavity continuous-wave multiwavelength distributed Bragg reflector fibre laser is described which stably generated eight longitudinal modes of the cavity spaced approximately 0.4 nm (50 GHz). The relative intensity noise of the laser was dominated by anti-phase relaxation oscillations associated with gain cross-saturation.
S. Pradhan, G.E. Town, K.J. Grant
openaire +1 more source
Advanced Engineering Materials, EarlyView.Freeze‐drying of layered silicate is the key to get coatings with superior gas barrier. Freeze‐drying of layered silicates modified with dodecylamine (DDA) is a highly effective technique for the preparation of barrier pigments that significantly mitigate the permeation of oxygen, water vapor, and hydrogen through polymer films containing these ...
Joshua Lommes +4 more
wiley +1 more source
Couplonics Of Cyclic Ternary Systems: From Coupled Periodic Waveguides To Discrete Photonic Crystals
Advanced Electromagnetics, 2013 In the context of coupled periodic waveguides, "couplonics" refers to the rigorous equivalence between continuous wave coupling and localized interactions.
Y. G. Boucher
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Long-wavelength GaInNAs/GaAs Vertical-cavity Surface-emitting Laser for Communication Applications
ARO-The Scientific Journal of Koya University, 2020 This paper presents a comprehensive study of optical and electrical properties of vertical-cavity surface-emitting lasers(VCSELS) for long wavelength communication applications.
Faten A. Chaqmaqchee
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Advanced Functional Materials, EarlyView.The separation of Helium gas from natural gas is challenging but highly important. MIL‐116(Ga), a “non‐porous” metal–organic framework is used as a molecular sieve to separate He from CH4. Druse‐like MIL‐116(Ga) particles are integrated into polysulfone mixed matrix membranes.
Ayisha Komal +10 more
wiley +1 more source