SOA-EAM frequency up/down-converters for 60-GHz bi-directional radio-on-fiber systems

We investigate a frequency up/down-converter based on a single cascaded semiconductor optical amplifier (SOA)-electroabsorption modulator (EAM) configuration for bi-directional 60-GHz-band radio-on-fiber (RoF) system applications. SOA cross-gain modulation and photodetection in EAM are used for frequency up-conversion, and EAM nonlinearity is used for frequency down-conversion. In our scheme, both 60-GHz local-oscillator (LO) signals and IF signals are optically transmitted from a central station to base stations. We characterize the dependence of frequency up/down-conversion efficiencies on EAM bias and optical LO power. For frequency up-conversion, maximum conversion gain of approximately 8 dB was obtained and, for frequency down-conversion, more than approximately 18-dB conversion loss was measured. Utilizing this frequency up/down converter, we demonstrate a 60-GHz bi-directional RoF link. Optically transmitted downlink 10-Mb/s quadrature phase-shift keying (QPSK) data at 100-MHz IF are frequency up-converted to the 60-GHz band at the base station, and uplink 10-Mb/s QPSK data in the 60-GHz band are frequency down-converted to 150-MHz IF and transmitted to the central station. In addition, the dependence of error vector magnitudes on IF signal power and wavelength is investigated.

[1]  H. Ogawa,et al.  Millimeter-wave fiber optics systems for personal radio communication , 1992 .

[2]  J. O'Reilly,et al.  Remote delivery of video services using mm-waves and optics , 1994 .

[3]  U. Gliese,et al.  Chromatic dispersion in fiber-optic microwave and millimeter-wave links , 1996 .

[4]  E. Suematsu,et al.  A fiber optic/millimeter-wave radio transmission link using HBT as direct photodetector and an optoelectronic upconverter , 1996 .

[5]  David Graham Moodie,et al.  Novel techniques for high-capacity 60-GHz fiber-radio transmission systems , 1997 .

[6]  Dalma Novak,et al.  Overcoming chromatic-dispersion effects in fiber-wireless systems incorporating external modulators , 1997 .

[7]  J. Mikkonen,et al.  Emerging wireless broadband networks , 1998 .

[8]  T. Hoshida,et al.  Nonlinear photodetection scheme and its system applications to fiber-optic millimeter-wave wireless down-links , 1999 .

[9]  T. Kuri,et al.  Fiber-optic millimeter-wave uplink system incorporating remotely fed 60-GHz-band optical pilot tone , 1999 .

[10]  V. Polo,et al.  Compensation of chromatic dispersion effects in microwave/millimeter-wave optical systems using four-wave-mixing induced in dispersion-shifted fibers , 1999, IEEE Photonics Technology Letters.

[11]  H. Sotobayashi,et al.  Cancellation of the signal fading for 60 GHz subcarrier multiplexed optical DSB signal transmission in nondispersion shifted fiber using midway optical phase conjugation , 1999 .

[12]  Toshiaki Kuri,et al.  An approach to single optical component antenna base stations for broad-band millimeter-wave fiber-radio access systems , 2000 .

[13]  David M. Pozar,et al.  Microwave and Rf Design of Wireless Systems , 2000 .

[14]  P.F.M. Smulders,et al.  Exploiting the 60 GHz band for local wireless multimedia access: prospects and future directions , 2002, IEEE Commun. Mag..

[15]  R. Iga,et al.  Lossless electroabsorption modulator monolithically integrated with a semiconductor optical amplifier and a passive waveguide , 2003, IEEE Photonics Technology Letters.

[16]  W. Choi,et al.  Photonic frequency-upconversion efficiencies in semiconductor optical amplifiers , 2003, IEEE Photonics Technology Letters.

[17]  Woo-Young Choi,et al.  Spurious-free dynamic range characteristics of the photonic up-converter based on a semiconductor optical amplifier , 2003 .

[18]  Dalma Novak,et al.  Capacity analysis for WDM fiber-radio backbones with star-tree and ring architecture incorporating wavelength interleaving , 2003 .

[19]  Sung-Bock Kim,et al.  Analysis and characterization of traveling-wave electrode in electroabsorption modulator for radio-on-fiber application , 2003 .

[20]  Takashi Ohira,et al.  Carrier generation and data transmission on millimeter-wave bands using two-mode locked Fabry-Perot slave lasers , 2003 .

[21]  Woo-Young Choi,et al.  Remote optoelectronic frequency down-conversion using 60-GHz optical heterodyne signals and an electroabsorption Modulator , 2005 .