Optimization of Optical Modulator for LTE RoF in Nonlinear Fiber Propagation

This letter proposes an optimized launch power for the direct detection of optical orthogonal frequency-division multiplexing (DD-OOFDM) for radio-over-flber (RoF). The aim is to optimize the physical layer connectivity for the third generation partnership program-long-term evolution employing RoF t...

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Bibliographic Details
Published in:IEEE photonics technology letters 2012-04, Vol.24 (7), p.617-619
Main Authors: Kanesan, T., Ng, W.P., Ghassemlooy, Z., Perez, J.
Format: Article
Language:English
Subjects:
External modulation
Fiber nonlinear optics
internal modulation
long term evolution (LTE)
Optical fibers
Optical modulation
Optical receivers
radio-over-fiber (RoF)
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Summary:This letter proposes an optimized launch power for the direct detection of optical orthogonal frequency-division multiplexing (DD-OOFDM) for radio-over-flber (RoF). The aim is to optimize the physical layer connectivity for the third generation partnership program-long-term evolution employing RoF technologies. We also analytically derive an expression for the distributed-feedback laser, laser-induced positive frequency chirping, incorporating the phenomena that induce 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 nonlinear regions, respectively.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2012.2185927