Low-power consumption seamless wireless and wired links using transparent waveform transfer

Tetsuya Kawanishi

doi:10.1515/aot-2014-0050

Article

Low-power consumption seamless wireless and wired links using transparent waveform transfer

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.

Published/Copyright: December 18, 2014

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From the journal Advanced Optical Technologies Volume 3 Issue 5-6

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.

Keywords: millimeter wave; optical fiber; seamless

Corresponding author: Tetsuya Kawanishi, Lightwave Devices Laboratory, Photonic Network Research Institute, National Institute of Information and Communications Technology, Koganei, Tokyo, Japan, e-mail: kawanish@nict.go.jp

About the author

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.

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.

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Received: 2014-9-20

Accepted: 2014-10-31

Published Online: 2014-12-18

Published in Print: 2014-12-1

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https://doi.org/10.1515/aot-2014-0050

Keywords for this article

millimeter wave; optical fiber; seamless