Measurement of the roughness of smooth glass surfaces using method of planar gradients optical waveguides

2018 ◽  
Author(s):  
Nikolai Espinosa ◽  
Anatoly N. Osovitsky ◽  
Jorge Alvarez ◽  
Christian Vega
Keyword(s):  
Optical Waveguides ◽  
Glass Surfaces

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

Acquired Factor XI Inhibitors in Two Patients with Hereditary Factor XI Deficiency

1984 ◽  
Vol 51 (03) ◽  
pp. 371-375 ◽  
Author(s):  
Kangathevy Morgan ◽  
Sandra Schiffman ◽  
Donald Feinstein
Keyword(s):  
Protein A ◽  
Lambda Light Chain ◽  
Factor Xi ◽  
Spontaneous Bleeding ◽  
Factor Xi Deficiency ◽  
Hereditary Factor ◽  
Coagulation Mechanism ◽  
Factor Xia ◽  
Polyclonal Igg ◽  
Glass Surfaces

SummaryTwo patients with hereditary factor XI deficiency developed inhibitors following plasma transfusions. Neither had severe spontaneous bleeding. The patients’ plasmas neutralized both factor XI in plasma, purified factor XI, and purified factor XIa. The inhibitor in both patients’ plasmas adsorbed to Protein A- Sepharose. The inhibitors eluted from Protein A-Sepharose were partially neutralized by kappa and lambda light chain antisera indicating that they were polyclonal IgG antibodies. Both inhibitors markedly decreased adsorption of factor XI to glass surfaces. The cleavage of factor XI by trypsin was unaffected by the inhibitors. The lack of severe spontaneous bleeding in both of these patients strongly suggests that an alternate coagulation mechanism bypassing factor XI must compensate for this severe defect.

Incorporation of Multi Wall Carbon Nanotubes into Glass-Surfaces via Laser-Treatment

2003 ◽  
Vol 772 ◽  
Author(s):  
T. Seeger ◽  
G. de la Fuente ◽  
W.K. Maser ◽  
A.M. Benito ◽  
A. Righi ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Continuous Wave ◽  
Silica Surface ◽  
Multi Wall Carbon Nanotubes ◽  
Composite Formation ◽  
Multi Walled Carbon Nanotubes ◽  
Glass Surfaces ◽  
Walled Carbon Nanotubes ◽  
First Time ◽  
Scanning Electron

AbstractCarbon nanotubes (CNT) are interesting candidates for the reinforcement in robust composites and for conducting fillers in polymers due to their fascinating electronic and mechanical properties. For the first time, we report the incorporation of multi walled carbon nanotubes (MWNTs) into silica-glass surfaces by means of partial surface-melting caused by a continuous wave Nd:YAG laser. MWNTs were detected being well incorporated in the silica-surface. The composites are characterized using scanning electron microscopy (SEM) and Raman-spectroscopy. A model for the composite-formation is proposed based on heatabsorption by MWNTs and a partial melting of the silica-surface.

Ray analysis of W-type slab optical waveguides with core distortions

1975 ◽  
Vol 11 (22) ◽  
pp. 534
Author(s):  
Shojiro Kawakami ◽  
Shigeo Nishida
Keyword(s):  
Optical Waveguides

Waisted-rib optical waveguides in GaAs

1980 ◽  
Vol 16 (11) ◽  
pp. 440 ◽  
Author(s):  
D.N. MacFadyen ◽  
C.R. Stanley ◽  
C.D.W. Wilkinson
Keyword(s):  
Optical Waveguides
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