Results 261 to 270 of about 26,548 (312)
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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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Summaries of Papers Presented at the Lasers and Electro-Optics. CLEO '02. Technical Diges, 2003
Summary from only given. Polymer optical waveguide devices have attracted a lot of attention with regard to applications in the all-optical network, basically, because they have the potential of added optical functionality and because they may be producible at low cost. The combination of a large thermo-optic (TO) coefficient with low heat conductivity
H.H. Yao +5 more
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Summary from only given. Polymer optical waveguide devices have attracted a lot of attention with regard to applications in the all-optical network, basically, because they have the potential of added optical functionality and because they may be producible at low cost. The combination of a large thermo-optic (TO) coefficient with low heat conductivity
H.H. Yao +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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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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Double-Corrugated Rectangular Waveguide Slow-Wave Structure for Terahertz Vacuum Devices
IEEE Transactions on Electron Devices, 2010 A novel rectangular-corrugated waveguide is proposed for submillimeter and terahertz vacuum devices. Two parallel corrugations that are enclosed in a rectangular waveguide create a beam channel that supports an interaction with a cylindrical electron ...
Mauro Mineo, Claudio Paoloni
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High-index-contrast waveguides and devices
Applied Optics, 2005We present a theoretical and experimental study of high-index-contrast waveguides and basic (passive) devices built from them. Several new results are reported, but to be more comprehensive we also review some of our previous results. We focus on a ridge waveguide, whose strong lateral confinement gives it unique properties fundamentally different from
Mee-Koy, Chin +3 more
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Resonant waveguide device with vertical gratings
Optics Letters, 2007Transmission resonant filters in a waveguide with vertical gratings have been realized in silicon on insulator wafers. Experimental studies of fabricated devices show a broad stopband of approximately 19 nm in the center of which exists a narrow transmission band of approximately 0.5 nm with a quality factor of approximately 3000.
Hyo-Chang, Kim +2 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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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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Saturation Of Nonlinearities And Waveguide Device Implications
SPIE Proceedings, 1990Most analyses and simulations of all-optical guided-wave devices are based on Kerr nonlinearities. In practice, most media exhibit index saturation and reduced absorption with increasing intensity in wavelength regions where their nonlinearity is usefully large. Such non-Kerr-like behavior can deteriorate the all-optical response of guided-wave devices
G. Assanto +5 more
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