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, Ernesto Ciaramella Ciaramella

Research output: Contribution to journalArticleAcademicpeer-review

7 Citations (Scopus)

Abstract

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 emiconductor amplifier (R-SOA) and exploits the interplay between transmission-line dispersion and tunable optical filtering to achieve flexible true time delay, with $2pi$ 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.
Original languageEnglish
Pages (from-to)5056-5064
Number of pages9
JournalJournal of Lightwave Technology
Volume27
Issue number22
DOIs
Publication statusPublished - 2009
Externally publishedYes

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