Results 261 to 270 of about 6,439,042 (312)

Polarization maintaining Single-mode fibers

Conference on Lasers and Electro-Optics, 1981
Polarization-maintaining single-mode fibers will find application in acoustooptic sensors and fiber gyroscopes. In this study both stress-induced birefringence and elliptical core polarization-maintaining single-mode fibers were developed and evaluated.
F I, Akers, R E, Thompson
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Attaching single-mode polarization-preserving fiber to single-mode semiconductor lasers

Applied Optics, 1984
The coupling of a semiconductor laser as a coherent well-polarized source to birefringent polarization-maintaining fiber is an important step in exploiting the unique characteristics of this waveguiding medium. The total light output of most semiconductor lasers is relatively poorly polarized yielding extinction ratios of the order of 10–12 dB. We wish
R O, Miles, A, Ceruzzi, M J, Marrone
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Chemically Etched Conical Microlenses for Coupling Single Mode Lasers into Single Mode Fibers

Topical Meeting on Integrated and Guided-Wave Optics, 1982
Coupling efficiency between single mode laser diodes and single mode fibers can be greatly increased by using lensing schemes to match their respective modes. Various such schemes have been reported [1-8]. Among these, microlenses formed out of the fiber itself are solid and have stable optical properties.
G, Eisenstein, D, Vitello
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Distributed single-mode fiber to single-mode planar waveguide coupler

Journal of Lightwave Technology, 1993
Light transfer between a curved single-mode fiber and a single-mode planar waveguide is investigated experimentally in dependence on the refractive index and thickness of the planar waveguide and for different polishing depths. Marcuse's model is applied to treat theoretically the coupler, leading to a very good agreement with the experimental results.
A.T. Andreev, K.P. Panajotov
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Single-mode fiber measurements

IEEE Transactions on Instrumentation and Measurement, 1986
In this invited tutorial review paper on single-mode fiber measurements, I discuss the various methods used to characterize the following important transmission parameters of single-mode fibers: attenuation, cut-off wavelength, mode-field diameter and chromatic dispersion.
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Single-mode quantum wires

Physical Review B, 1996
We calculate the self-consistent electronic structure of GaAs-${\mathrm{Al}}_{\mathit{x}}$${\mathrm{Ga}}_{1\mathrm{\ensuremath{-}}\mathit{x}}$As split-gate quantum wires taking into account the ordering in the donor layer which occurs when the ionization fraction F is less than unity. Ordered ion distributions are generated via a Monte Carlo simulation
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Couplings between Single-Mode Lasers and Single-Mode Fibers

1983
This Symposium brief reports some preliminary results obtained in our laboratory in single-mode laser and single-mode fiber couplings, with a view to ascertaining a satisfactory coupling technique which possesses simultaneously a higher coupling efficiency and a weaker optical feedback.
Zhu Yan-nian, G. Wenke
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Microlenses for coupling single-mode fibers to single-mode thin-film waveguides

Applied Optics, 1980
A new method has been devised for producing microlenses on the ends of single-mode optical fibers. A lens is formed by dipping the fiber end into a negative photoresist while the fiber core carries greater, similar0.1 mW of He-Ne laser light. The photoresist lenses require no developing or rinsing.
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A single mode of canalization

Trends in Ecology & Evolution, 2002
The evolution of mechanisms underlying the buffering of the phenotype against genetic and environmental influences has received much theoretical and experimental attention, yet many issues remain unresolved. Here, we consider the kinds of biological process that are likely to promote this buffering, or canalization, and the circumstances under which ...
Colin D. Meiklejohn, Daniel L. Hartl
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Single-Mode VCSELs

2012
The only active transverse mode in a truly single-mode VCSEL is the fundamental mode with a near Gaussian field distribution. A single-mode VCSEL produces a light beam of higher spectral purity, higher degree of coherence and lower divergence than a multimode VCSEL and the beam can be more precisely shaped and focused to a smaller spot.
Anders Larsson, Johan S. Gustavsson
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