Results 261 to 270 of about 16,697 (297)
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Czechoslovak Journal of Physics, 2004
In the paper an optogalvanic experiment is described. A tunable dye laser irradiates discharge plasma in neon and the change of the plasma density is measured by microwave technique. The paper describes also the theoretical method which gives the change of the plasma impedance in relation to the measured signal.
Rudolf Nistor, Emil Petrescu
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In the paper an optogalvanic experiment is described. A tunable dye laser irradiates discharge plasma in neon and the change of the plasma density is measured by microwave technique. The paper describes also the theoretical method which gives the change of the plasma impedance in relation to the measured signal.
Rudolf Nistor, Emil Petrescu
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Dielectric Waveguides and Waveguide Devices for Microwave Applications
4th European Microwave Conference, 1974, 1974A survey on the state of the art in Dielectric Waveguide (DW), stressing in particular the practical microwave applications, is given. The principles for designing DWs, fixing and joining devices, launchers, various multiport networks etc. are founded. A simple theory to calculate parameters of multiport networks with distributed coupling is developped.
V. F. VZYATYSHEV +3 more
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Quantum-dot semiconductor waveguide devices
SPIE Proceedings, 2007We have designed, fabricated and characterized self-assembled InAs/InGaAsP QD-waveguide devices around 1.55 μm. In order to obtain optimal performance, we have investigated several QD-based semiconductor optical amplifiers (SOAs) / lasers with different core geometry and doped profiles.
Hall, Thomas +11 more
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Magneto-inductive waveguide devices
IEE Proceedings - Microwaves, Antennas and Propagation, 2006Devices formed from magneto-inductive waveguides based on coupled loop resonators are considered using simple analytic theory, initially assuming lossless propagation and nearest-neighbour coupling. Two-port devices that were considered include mirrors, Fabry-Perot resonators, Bragg gratings and tapers, while more general N-port devices include power ...
R.R.A. Syms, E. Shamonina, L. Solymar
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SPIE Proceedings, 2007
This paper presents our recent progress in the development of a Si wire waveguiding system for microphotonics devices. We have developed function devices that integrate several fundamental components and confirmed that they exhibited excellent characteristics due to the accuracy of the Si microfabrication.
T. Watanabe +5 more
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This paper presents our recent progress in the development of a Si wire waveguiding system for microphotonics devices. We have developed function devices that integrate several fundamental components and confirmed that they exhibited excellent characteristics due to the accuracy of the Si microfabrication.
T. Watanabe +5 more
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Polymer waveguides and devices
Technical Digest. CLEO/Pacific Rim '99. Pacific Rim Conference on Lasers and Electro-Optics (Cat. No.99TH8464), 2003We have investigated two kinds of polymeric thermo-optical (TO) components, i.e. a 1×8 digital TO switch relying on adiabatic mode evolution and a TO tunable filter using a thermally-controlled arrayed-waveguide grating (AWG). Cross-linked waveguides are developed to have low insertion loss, polarization independence, moisture insensitivity, and thermo-
T. Kurihara, Y. Hida, N. Ooba, S. Toyoda
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Glass waveguide devices on silicon
Optical Society of America Annual Meeting, 1990We have developed two waveguides made with conventional silicon technology: one matching an optical fiber and one matching a semiconductor laser. We will discuss the following devices: a hybrid laser chip with 7 KHz linewidth; a 19 × 19 star coupler; an adiabatic polarization splitter; and a 4 channel multiplexer with elliptical Bragg reflectors.
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Nonlinear channel waveguide devices
Annual Meeting Optical Society of America, 1985Devices that perform all-optical signal processing are of interest in optical computing and optical communications. Two devices that have demonstrated such capabilities are the nonlinear directional coupler (NLDC) and the nonlinear Mach-Zehnder interferometer (NLMZ). In these devices the output intensity depends on the input intensity via the intensity-
Wayne M. Gibbons +2 more
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Embossed polymer waveguide devices
Conference on Lasers and Electro-Optics Europe, 1994Recently there has been renewed interest in moulding and embossing of polymers as potentially cheap methods of mass producing passive waveguide devices.1,2 Manufacturing components with good optical performance by these methods requires careful control of the fabrication process and the use of materials with optimised properties.
T. G. Harvey +15 more
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SPIE Proceedings, 2009
SOI based waveguide devices are becoming more and more active. The main results of the devices investigated in our team are presented in the paper. Photonic crystal with sharp bends was made and its excess loss is 1.1±0.4dB per mirror. Two kinds of couplers, slot coupler and grating coupler, were successfully fabricated.
Jinzhong Yu +9 more
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SOI based waveguide devices are becoming more and more active. The main results of the devices investigated in our team are presented in the paper. Photonic crystal with sharp bends was made and its excess loss is 1.1±0.4dB per mirror. Two kinds of couplers, slot coupler and grating coupler, were successfully fabricated.
Jinzhong Yu +9 more
openaire +1 more source