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Proceedings Paper

Effect of modulator chirp on carrier suppressed double sideband radio over fiber link
Author(s): Xiaogang Chen; Shenqin Feng; Deyi Chen
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Paper Abstract

The impact of Mach-Zehnder modulator (MZM) chirp on carrier suppressed double sideband (CS-DSB) radio over fiber (RoF) link is analyzed and simulated. Finite extinction ratio and drive signal unbalanced ratio of nonideal MZM are considered, power variation of targeted microwave signal and harmonic suppression are calculated and evaluated. The results show that drive signal unbalanced ratio could be optimized to minimize the power variation owing to the finite extinction ratio in the CS-DSB RoF link. However, harmonic suppress ratio declined rapidly with the decrease of extinction ratio, although the unbalanced ratio could also be adjusted to improve the harmonic suppression. For a nonideal modulator with low extinction ratio, unbalanced ratio could be optimized to overcome power penalty caused by finite extinction ration, while an additional filter is required to suppress the unwanted harmonic components in the CS-DSB RoF link.

Paper Details

Date Published: 19 February 2009
PDF: 6 pages
Proc. SPIE 7279, Photonics and Optoelectronics Meetings (POEM) 2008: Optoelectronic Devices and Integration, 72790C (19 February 2009); doi: 10.1117/12.820796
Show Author Affiliations
Xiaogang Chen, China Three Gorges Univ. (China)
Shenqin Feng, China Three Gorges Univ. (China)
Deyi Chen, China Three Gorges Univ. (China)


Published in SPIE Proceedings Vol. 7279:
Photonics and Optoelectronics Meetings (POEM) 2008: Optoelectronic Devices and Integration
Liming Zhang; Michael J. O'Mahony, Editor(s)

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