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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)

    Abstract

    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
    Volume24
    Issue number7
    DOIs
    Publication statusPublished - Jan 2012

    Keywords

    • fiber nonlinear optics
    • optical fibers
    • optical modulation
    • optical receivers

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