Results 241 to 250 of about 1,290,697 (278)

Single-mode optical waveguides

Applied Optics, 1979
An efficient and powerful technique has been developed to treat the problem of wave propagation along arbitrarily shaped single-mode dielectric waveguides with inhomogeneous index variations in the cross-sectional plane. This technique is based on a modified finite-element method.
C, Yeh, K, Ha, S B, Dong, W P, Brown
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Expanded single mode fiber

OFC 2001. Optical Fiber Communication Conference and Exhibit. Technical Digest Postconference Edition (IEEE Cat. 01CH37171), 2001
We present a solution to maintain an expanded mode in the extremity of a single mode fiber by using a piece-of multimode step index fiber. With a 25 /spl mu/m spot size, the average connection loss is 0.36 dB (without Fresnel reflection) for a multimode section length inferior to 5 cm.
Chanclou, Philippe, Gravey, Philippe, Thual, Monique   +2 more
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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
openaire   +2 more sources

Investigation on Single-Mode-Multimode-Single-Mode Fiber Structure

2011 Symposium on Photonics and Optoelectronics (SOPO), 2011
The multimode interference (MMI) theory and corresponding re-imaging phenomena occurring in a single - mode-multimode-single-mode (SMS) fiber structure is investigated. And the commercially available beam propagation method (BPM) have been adapted and analyzed to model the light propagation in this structure.
Yu Zhao, Yongxing Jin, Houhui Liang
openaire   +1 more source

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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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
openaire   +1 more source

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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Single Mode Fiber Optic Components

IEEE Journal of Quantum Electronics, 1981
In the process of studying single-mode fiber optic systems it became rapidly apparent a few years ago that it would be desirable to perform a number of functions with in-line components, which would allow for signal processing without the removal of the optical signal from the fiber.
R. Bergh, M. Digonnet, H. Lefevre, S. Newton, H. Shaw   +4 more
openaire   +1 more source