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Journal of Lightwave Technology

Journal of Lightwave Technology


  • Vol. 27, Iss. 22 — Nov. 15, 2009
  • pp: 5056–5064

Variable Delay With Directly-Modulated R-SOA and Optical Filters for Adaptive Antenna Radio-Fiber Access

Kamau Prince, Marco Presi, Andrea Chiuchiarelli, Isabella Cerutti, Giampiero Contestabile, Idelfonso Tafur Monroy, and Ernesto Ciaramella

Journal of Lightwave Technology, Vol. 27, Issue 22, pp. 5056-5064 (2009)

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We present an all-optical adaptive-antenna radio over fiber transport system that uses proven, commercially-available components to effectively deliver standard-compliant optical signaling to adaptive multiantenna arrays for current and emerging radio technology implementations. The system is based on a directly-modulated reflective semiconductor amplifier (R-SOA) and exploits the interplay between transmission-line dispersion and tunable optical filtering to achieve flexible true time delay, with $2\pi$ beam steering at the different antennas. The system was characterized, then successfully tested with two types of signals defined in IEEE 802.16 (WiMAX) standard for wireless networks: a 90 Mbps single-carrier signal (64-QAM at 2.4 GHz) and a 78 Mbps multitone orthogonal frequency-division multiple access (OFDMA) signal. The power budget of this configuration supports a 4-element antenna array.

© 2009 IEEE

Kamau Prince, Marco Presi, Andrea Chiuchiarelli, Isabella Cerutti, Giampiero Contestabile, Idelfonso Tafur Monroy, and Ernesto Ciaramella, "Variable Delay With Directly-Modulated R-SOA and Optical Filters for Adaptive Antenna Radio-Fiber Access," J. Lightwave Technol. 27, 5056-5064 (2009)

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