Title :
Overcoming Chromatic-Dispersion-Induced Power Fading in ROF Links Employing Parallel Modulators
Author :
Cui, Yan ; Xu, Kun ; Dai, Jian ; Sun, Xiaoqiang ; Dai, Yitang ; Ji, Yuefeng ; Lin, Jintong
Author_Institution :
State Key Lab. of Inf. Photonics & Opt. Commun., Beijing Univ. of Posts & Telecommun., Beijing, China
fDate :
7/15/2012 12:00:00 AM
Abstract :
This letter presents a chromatic dispersion (CD) compensation scheme using parallel electro-optic phase and intensity modulators suitable for long-reach radio-over-fiber links. By properly adjusting the optical power and the time delay between the two modulated signals, the power fading aroused by the CD is adequately compensated over a wide operating bandwidth of 0-18 GHz over a 34-km single-mode fiber (SMF). Compared with a double sideband (DSB) modulated link, an enhancement of up to 31 dB·Hz2/3 in the spur-free dynamic range for a 9.5-GHz signal is obtained. Furthermore, a bit-error rate of 10-10 is obtained when a 9.5-GHz carrier loading 2-Gb/s pseudorandom bit sequence is transmitted over the dispersive link, which is not achievable for the DSB modulated link.
Keywords :
compensation; electro-optical modulation; error statistics; intensity modulation; optical fibre dispersion; radio-over-fibre; random sequences; ROF links; bit error rate; bit rate 2 Gbit/s; chromatic-dispersion-induced power fading; compensation scheme; distance 34 km; frequency 9.5 GHz; intensity modulators; long-reach radio-over-fiber links; parallel electro-optic phase modulators; parallel modulators; pseudorandom bit sequence; single-mode fiber; Optical fiber communication; Optical fibers; Optical modulation; Optical polarization; Radio frequency; Chromatic dispersion; power fading; radio-over-fiber;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2012.2192422
