scholarly journals Design for polymer optical waveguides realizing efficient light coupling via 45-degree mirrors

2019 ◽  
Vol 27 (8) ◽  
pp. 10839 ◽  
Author(s):  
Yoshie Morimoto ◽  
Takaaki Ishigure
Keyword(s):  
Optical Waveguides ◽  
Light Coupling

scholarly journals Dynamic diffraction-limited light-coupling of 3D-maneuvered wave-guided optical waveguides

2014 ◽  
Vol 22 (15) ◽  
pp. 17880 ◽  
Author(s):  
Mark Villangca ◽  
Andrew Bañas ◽  
Darwin Palima ◽  
Jesper Glückstad
Keyword(s):  
Optical Waveguides ◽  
Light Coupling ◽  
Dynamic Diffraction

scholarly journals 3D Multi-Branched SnO2 Semiconductor Nanostructures as Optical Waveguides

Materials ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3148
Author(s):  
Francesco Rossella ◽  
Vittorio Bellani ◽  
Matteo Tommasini ◽  
Ugo Gianazza ◽  
Elisabetta Comini ◽  
...  
Keyword(s):  
Communication Networks ◽  
Optical Waveguides ◽  
Light Propagation ◽  
Rayleigh Scattering ◽  
Complex Geometry ◽  
Building Blocks ◽  
One Dimensional ◽  
Light Coupling ◽  
Experimental Findings ◽  
The Ideal

Nanostructures with complex geometry have gathered interest recently due to some unusual and exotic properties associated with both their shape and material. 3D multi-branched SnO2 one-dimensional nanostructrures, characterized by a “node”—i.e., the location where two or more branches originate, are the ideal platform to distribute signals of different natures. In this work, we study how this particular geometrical configuration affects light propagation when a light source (i.e., laser) is focused onto it. Combining scanning electron microscopy (SEM) and optical analysis along with Raman and Rayleigh scattering upon illumination, we were able to understand, in more detail, the mechanism behind the light-coupling occurring at the node. Our experimental findings show that multi-branched semiconductor 1D structures have great potential as optically active nanostructures with waveguiding properties, thus paving the way for their application as novel building blocks for optical communication networks.

A proposal for wide range wavelength switching process using optical force

2021 ◽  
Author(s):  
Ali Taghizad Fanid ◽  
Ali Rostami
Keyword(s):  
Optical Waveguides ◽  
Optical Force ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Silica Substrate ◽  
Light Coupling ◽  
Scattering Effects ◽  
Wide Range ◽  
Control Light ◽  
Core Shell Nanoparticles

Abstract Optomechanical wavelength up-conversion based on optical force and core-shell scattering effects are used to control light coupling between two waveguides. This system consists of two parallel optical waveguides with 20 µm lengths suspended on a silica substrate embedded with Ag/Si/SiO2 core-shell nanoparticles. By mid-IR plane wave illumination with different intensities and different wavelengths on nanoparticles, scattering would increase and result in an improvement in attractive gradient optical force exerted on waveguides. Via bending waveguides toward each other, visible light propagating in the first waveguide would couple to another. PDMS as a polymer is used to reduce the required power for bending waveguides. Results reveal that when waveguides’ gap equilibrium is 400 nm and wavelengths of control and probe lights are 4.5 µm and 0.45 µm respectively, about 10.75 mW/µm2 power is needed to bend waveguides for total coupling of light between waveguides. The efficiency of the coupled waveguides system is %43.

TEM characterization of proton-exchanged LiNbO3 optical waveguides

1986 ◽  
Vol 44 ◽  
pp. 480-481
Author(s):  
W. E. Lee
Keyword(s):  
Refractive Index ◽  
Benzoic Acid ◽  
Optical Waveguides ◽  
Total Internal Reflection ◽  
Index Of Refraction ◽  
Optical Measurements ◽  
Lithium Ions ◽  
Wide Channel ◽  
Tem Characterization

An optical waveguide consists of a several-micron wide channel with a slightly different index of refraction than the host substrate; light can be trapped in the channel by total internal reflection.Optical waveguides can be formed from single-crystal LiNbO3 using the proton exhange technique. In this technique, polished specimens are masked with polycrystal1ine chromium in such a way as to leave 3-13 μm wide channels. These are held in benzoic acid at 249°C for 5 minutes allowing protons to exchange for lithium ions within the channels causing an increase in the refractive index of the channel and creating the waveguide. Unfortunately, optical measurements often reveal a loss in waveguiding ability up to several weeks after exchange.

Intrinsic mode theory of tapered optical waveguides

1985 ◽  
Vol 132 (6) ◽  
pp. 314 ◽  
Author(s):  
J.M. Arnold ◽  
A. Belghoraf ◽  
A. Dendane
Keyword(s):  
Optical Waveguides ◽  
Mode Theory
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