Optimization of Optical Modulator for LTE RoF in Nonlinear Fibre Propagation

Thavamaran Kanesan, Wai Pang Ng, Zabih Ghassemlooy, Joaquin Perez Soler

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)


This letter proposes an optimized launch power for the direct detection optical orthogonal frequency division multiplexing (DD-OOFDM) for radio-over-fiber (RoF). The aim is to optimize the physical layer connectivity for the 3rd generation partnership program (3GPP)-long term evolution (LTE) employing RoF technologies. We also analytically derive an expression for the distributed feedback laser (DFB) laser induced positive frequency chirping (PFC), incorporating the phenomena that induces phase distortion at the receiver and explicitly explain the transient chirp of DD-OOFDM. Results show that transmission at the optimized launch power of -4 dBm improves the system power efficiency of 16-quadrature amplitude modulation (QAM) DD-OOFDM by ~20% and ~37%; 64-QAM DD-OOFDM by ~21% and ~35% compared to launch powers in the linear and non-linear regions, respectively.
Original languageEnglish
Pages (from-to)617-619
JournalIEEE Photonics Technology Letters
Issue number7
Publication statusPublished - Jan 2012


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