Title :
Reversely Modulated Optical Single Sideband Scheme and Its Application in a 60-GHz Full Duplex ROF System
Author :
Cao, Zizheng ; Yu, Jianjun ; Chen, Lin ; Shu, Qinglong
Author_Institution :
Sch. of Inf. Sci. & Eng., Hunan Univ., Changsha, China
fDate :
5/15/2012 12:00:00 AM
Abstract :
The reversely modulated optical single sideband scheme (IM-OSSB) based on a parallel Mach-Zehnder modulator (P-MZM) is proposed. In this P-MZM, one sub-MZM is employed for data modulation and the other is used for optical millimeter wave (mm-wave) generation. Due to the individual modulation, this scheme is data-format-transparent and can be used to generate a high performance optical mm-wave signal at the optimized direct current (dc) bias. There is electrical mixer free at the transmitter and thus the bandwidth limitation, nonlinearity and conversion loss from the electrical mixer are released in this scheme. Moreover, the modulation power efficiency of IM-OSSB can be improved by adjusting the dc bias in the modulator. Based on IM-OSSB, we demonstrate a 60-GHz full duplex radio-over-fiber system. The experimental results show that the power penalty of 2.9-Gb/s on-off keying data carried by 58-GHz mm-wave after transmission over 50-km SMF-28 is negligible.
Keywords :
amplitude shift keying; millimetre wave mixers; optical modulation; radio-over-fibre; bit rate 2.9 Gbit/s; data modulation; data-format-transparent; electrical mixer free; frequency 60 GHz; full duplex ROF system; high performance optical mm-wave signal; on-off keying data; optical millimeter wave generation; optimized direct current bias; parallel Mach-Zehnder modulator; reversely modulated optical single sideband scheme; Optical amplifiers; Optical fibers; Optical filters; Optical harmonic generation; Optical modulation; Optical receivers; Optical power efficiency improvement; optical single sideband modulation; radio-over-fiber;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2012.2188853
