Title :
Error-free simultaneous all-optical upconversion of WDM radio-over-fiber signals
Author :
Song, Ho-Jin ; Lee, Jeong Seon ; Song, Jong-In
Author_Institution :
Dept. of Inf. & Commun., Gwangju Inst. of Sci. & Technol., South Korea
Abstract :
A simultaneous all-optical upconversion technique for cost-effective wavelength-division-multiplexing (WDM) radio-over-fiber (RoF) applications utilizing a semiconductor optical amplifier (SOA) Mach-Zehnder interferometer is investigated. The proposed upconversion scheme uses only one frequency upconverter for multi-RoF channels, thereby reducing the complexity and cost of the system. Error-free simultaneous all-optical upconversion of two WDM intermediate frequency (IF) channels (155-Mb/s differential phase-shift keying signal at 2.5 GHz) to an optical radio frequency signal (22.5 GHz) is achieved. In addition, the effect of gain saturation of the SOA due to the increased number of WDM IF channels on bit-error-rates performance is also experimentally investigated.
Keywords :
Mach-Zehnder interferometers; differential phase shift keying; error statistics; microwave photonics; optical fibre communication; optical frequency conversion; optical modulation; semiconductor optical amplifiers; telecommunication channels; wavelength division multiplexing; 155 Mbit/s; 22.5 GHz; Mach-Zehnder interferometer; WDM radio-over-fiber signals; all-optical upconversion; bit-error-rate; differential phase-shift keying signal; frequency upconverter; gain saturation; intermediate frequency; multiRoF channels; semiconductor optical amplifier; wavelength-division-multiplexing; Costs; Differential phase shift keying; Optical interferometry; Optical saturation; Performance gain; RF signals; Radio frequency; Semiconductor optical amplifiers; Stimulated emission; Wavelength division multiplexing; All-optical frequency upconversion; photonic mixer; radio frequency (RF) photonics; radio-over-fiber (RoF) system; semiconductor optical amplifier Mach–Zehnder interferometer (SOA-MZI);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2005.850894
