Results 251 to 260 of about 6,799,314 (287)

Quasi-optical mode converter for high power gyrotron

2011 IEEE International Vacuum Electronics Conference (IVEC), 2011
Gyrotrons are microwave / millimeter wave devices capable to deliver megawatt level continuous power at a frequency range up to 170GHz. The critical design issues for a high power gyrotrons are: (1) Magnetron injection Gun (2) Cavity with proper mode (3) quasi-optical launcher (4) depressed collector system and (5) RF-window.
B. K. Shukla, Dhiraj Bora
openaire   +1 more source

On the fundamental efficiency limits of photovoltaic converters for optical power transfer applications

2013 IEEE 39th Photovoltaic Specialists Conference (PVSC), 2013
Dedicated photovoltaic converters for the conversion of monochromatic laser radiation (laser power converters (LPCs)) have been developed for high efficiency conversion of laser radiation at 1550 nm into electrical power. The LPC design is based on the InGaAsP/InP material system and achieves a maximum conversion efficiency of 45 % (±1%) under 1.55 μm ...
Jarvis, Scott, Mukherjee, Jayanta, Perren, Matthew, Sweeney, Stephen J., IEEE   +4 more
openaire   +3 more sources

Improvement of InGaN power converters for optical wireless power transmission

Japanese Journal of Applied Physics
Abstract InGaN power converters, which can absorb near-ultraviolet light with a low attenuation coefficient in water, are expected to be used for underwater optical wireless power transmission. To improve photovoltaic conversion efficiency (PCE) under high-power near-ultraviolet laser illumination, we fabricated ...
Junichi Suzuki, Ryusei Takahashi, Masahiro Koga, Shunsuke Shibui, Shunki Hayashi, Yuto Kaneko, Reo Aoyama, Takahiro Noguchi, Takahiro Fujisawa, Toshihiko Fukamachi, Koichi Naniwae, Shiori Ii, Ruka Watanabe, Makoto Miyoshi, Tetsuya Takeuchi, Satoshi Kamiyama, Shiro Uchida   +16 more
openaire   +1 more source

Sharing Simple Wavelength Converters in Optical Packet Switching: Performance and Power Consumption Evaluation

2010 IEEE Global Telecommunications Conference GLOBECOM 2010, 2010
This paper considers simple fixed-output wavelength converters to implement shared-per-node optical packet switching with wavelength domain contention resolution capability. Scheduling algorithm and logical performance analysis are presented in synchronous context.
RAFFAELLI, CARLA, SAVI, MICHELE
openaire   +3 more sources

Powerful nuclear-optical converters for applications in scientific investigations and national industry

SPIE Proceedings, 1998
The problem questions connected with projecting and development of reactor-lasers are considered. Reactor-laser parameters with laser output power from about 100 kW to 1 MW which may be used for applications in the various field of human interest are examined. Some problems which demand auxiliary investigations are considered.
Anatolii A. Sinyanskii, V. N. Krivonosov
openaire   +1 more source

Long-wavelength laser power converters for optical fibers

Conference Record of the Twenty Sixth IEEE Photovoltaic Specialists Conference - 1997, 2002
Measured responsivity and illuminated I-V data are presented for III-V In/sub x/Ga/sub 1-x/As-based photovoltaic cells with bandgaps of 1.42 eV (GaAs), 0.74 (lattice-matched In/sub 0.53/Ga/sub 0.47/As), and 0.55 eV ("extended" lattice-mismatched In/sub 0.7/Ga/sub 0.3/As) relevant to their application as laser power converters (LPCs) sensitive to ...
openaire   +1 more source

Fiber-Optic Angle Converter with Adaptive Error Correction of Non-Uniform Division of Optical Power

Measurement Techniques, 2015
We analyze instrument error caused by non-uniform input radiation into measuring channels of fiber-optic communication lines. We study the design of a converter, which implements an adaptive method of correction. The results of the experimental evaluation of the effectiveness of the developed hardware and software are presented.
V. M. Grechishnikov, V. G. Domrachev, O. V. Teryaeva, A. A. Yudin   +3 more
openaire   +1 more source

DC-AC photonic power converters with liquid crystal optical modulators

Optics Letters
In this Letter, we propose a power-switch-free (PSF) DC–AC photonic power converter (PPC) that utilizes liquid-crystal optical modulators (LCOMs) to commutate optical flux, thereby eliminating the need for power switches and avoiding switching-induced electromagnetic interference (EMI).
Guidong Zhang, Shiye Li, Zaoming Huang, Samson S. Yu, Lihao Wu, Chi K. Tse   +5 more
openaire   +2 more sources

Analysis of Probe Signal Power Dependence of All-Optical Wavelength Converter Using Semiconductor Optical Amplifiers

Japanese Journal of Applied Physics, 2001
We analyzed the influence of the probe signal power on the wavelength conversion in an interferometric all optical wavelength converter using semiconductor optical amplifiers (SOAs). The carrier density variation inside an SOA due to longitudinal signal amplification and nonradiative recombination is investigated and the following variation of ...
Si-mon Shin, Min-ho Lee, Sang-Kook Han
openaire   +1 more source

Optimal Synthesis of Quasi-Optical Converters for High Power Gyrotrons

2006 IEEE International Vacuum Electronics Conference held Jointly with 2006 IEEE International Vacuum Electron Sources, 2006
Quasi-optical launcher converter designs for high power gyrotrons use perturbations of the waveguide surface to convert the high order cavity mode to a Gaussian like beam. These designs of these converters is based on an analytic theory that specifies the mode amplitudes to obtain a Gaussian like distribution of the field in the azimuthal and axial ...
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