Optimization of Optical Modulator for LTE RoF in Nonlinear Fibre Propagation

Kanesan, Thavamaran, Ng, Wai Pang, Ghassemlooy, Zabih and Perez Soler, Joaquin (2012) Optimization of Optical Modulator for LTE RoF in Nonlinear Fibre Propagation. IEEE Photonics Technology Letters, 24 (7). pp. 617-619. ISSN 1041-1135

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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.

Item Type:	Article
Uncontrolled Keywords:	fiber nonlinear optics, optical fibers, optical modulation, optical receivers
Subjects:	H600 Electronic and Electrical Engineering
Department:	Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User:	Ay Okpokam
Date Deposited:	23 Feb 2012 14:00
Last Modified:	13 Oct 2019 00:32
URI:	http://nrl.northumbria.ac.uk/id/eprint/5529

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