Low-power consumption seamless wireless and wired links using transparent waveform transfer
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Tetsuya Kawanishi
Tetsuya Kawanishi received his BE, ME, and PhD degrees in Electronics from Kyoto University, Kyoto, Japan, in 1992, 1994, and 1997, respectively. From 1994 to 1995, he was with the Production Engineering Laboratory of Panasonic. During 1997, he was with the Venture Business Laboratory, Kyoto University, where he was engaged in research on electromagnetic scattering and on near-field optics. In 1998, he joined the Communications Research Laboratory, Ministry of Posts and Telecommunications (now the National Institute of Information and Communications Technology, NICT), Tokyo, Japan, where he is currently the Director of Lightwave Devices Laboratory of NICT. During 2004, he was a Visiting Scholar at the Department of Electrical and Computer Engineering, University of California at San Diego. His current research interests include high-speed optical modulators and RF photonics.
Abstract
This paper describes wired and wireless seamless networks consisting of radiowave and optical fiber links. Digital coherent technology developed for high-speed optical fiber transmission can mitigate signal deformation in radiowave links in the air as well as in optical fibers. Radio-over-fiber (RoF) technique, which transmits radio waveforms on intensity envelops of optical signals, can provide direct waveform transfer between optical and radio signals by using optical-to-electric or electric-to-optical conversion devices. Combination of RoF in millimeter-wave bands and digital coherent with high-performance digital signal processing (DSP) can provide wired and wireless seamless links where bit rate of wireless links would be close to 100 Gb/s. Millimeter-wave transmission distance would be shorter than a few kilometers due to large atmospheric attenuation, so that many moderate distance wireless links, which are seamlessly connected to optical fiber networks should be required to provide high-speed mobile-capable networks. In such systems, reduction of power consumption at media converters connecting wired and wireless links would be very important to pursue both low-power consumption and large capacity.
About the author
Tetsuya Kawanishi received his BE, ME, and PhD degrees in Electronics from Kyoto University, Kyoto, Japan, in 1992, 1994, and 1997, respectively. From 1994 to 1995, he was with the Production Engineering Laboratory of Panasonic. During 1997, he was with the Venture Business Laboratory, Kyoto University, where he was engaged in research on electromagnetic scattering and on near-field optics. In 1998, he joined the Communications Research Laboratory, Ministry of Posts and Telecommunications (now the National Institute of Information and Communications Technology, NICT), Tokyo, Japan, where he is currently the Director of Lightwave Devices Laboratory of NICT. During 2004, he was a Visiting Scholar at the Department of Electrical and Computer Engineering, University of California at San Diego. His current research interests include high-speed optical modulators and RF photonics.
Acknowledgments
A part of this article is based on research outcomes of the research project ‘R&D of high-precision imaging technology using 90 GHz band linear cells’, supported by the Japanese Government funding for ‘R&D to Expand Radio Frequency Resources’ from the Ministry of Internal Affairs and Communications.
References
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©2014 THOSS Media & De Gruyter
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Artikel in diesem Heft
- Cover and Frontmatter
- Views
- III-V Multi-junction solar cells and concentrating photovoltaic (CPV) systems
- Lasers in Green Production: The best is yet to come
- From LED to laser fusion: Green Photonics in a US perspective
- Community
- News from the European Optical Society
- Conference Notes
- Conference Calendar
- Topical Issue: Green Photonics
- Editorial
- Green photonics: sustainable solutions for a future with light
- Review Articles
- Interferometric femtosecond laser processing for nanostructuring inside thin film
- Multilayer-based lab-on-a-chip systems for perfused cell-based assays
- System efficiency of laser-based white light
- Low-power consumption seamless wireless and wired links using transparent waveform transfer
- Research Articles
- Femtosecond laser full and partial texturing of steel surfaces to reduce friction in lubricated contact
- Multi-pass absorption spectroscopy for H2O2 detection using a CW DFB-QCL
