Title :
Simultaneous all-optical frequency downconversion technique utilizing an SOA-MZI for WDM radio over fiber (RoF) applications
Author :
Song, Ho-Jin ; Song, Jong-In
Author_Institution :
Dept. of Inf. & Commun., Gwangju Inst. of Sci. & Technol.
Abstract :
Simultaneous all-optical frequency-downconversion technique utilizing a semiconductor optical amplifier Mach-Zehnder interferometer (SOA-MZI) is experimentally demonstrated, and its application to a wavelength-division-multiplexing (WDM) radio over fiber (RoF) uplink is proposed. The conversion efficiencies from 22.5 (fRF) to 2.5 GHz (fIF=fRF-2fLO) are in the range from 1.5 to 3 dB for the optical RF wavelength between 1548 and 1558 nm. Error-free simultaneous all-optical frequency downconversion of the two WDM RoF upstream channels that carry 155-Mb/s differential phase-shift keying data at 22.5 GHz to an optical intermediate frequency signal having the frequency of 2.5 GHz with the power penalty less than 0.1 dB at the bit error rate of 10-8 is achieved
Keywords :
Mach-Zehnder interferometers; differential phase shift keying; error statistics; microwave photonics; optical communication equipment; optical frequency conversion; radio-over-fibre; semiconductor optical amplifiers; telecommunication channels; wavelength division multiplexing; 1548 to 1558 nm; 155 Mbit/s; 2.5 GHz; 22.5 GHz; Mach-Zehnder interferometer; WDM; all-optical frequency downconversion; bit error rate; differential phase-shift keying; error-free frequency downconversion; optical intermediate frequency signal; power penalty; radio over fiber; semiconductor optical amplifier; upstream channels; Bandwidth; Frequency conversion; Microwave photonics; Optical fiber communication; Optical fibers; Optical interferometry; Optical modulation; Radio frequency; Semiconductor optical amplifiers; Wavelength division multiplexing; All-optical frequency downconversion; microwave photonics; photonic mixer; radio over fiber (RoF) system; semiconductor optical amplifier Mach–Zehnder interferometer (SOA-MZI); wavelength division multiplexing;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2006.878015
