Title :
Optical Frequency Conversion for Millimeter-Wave Ultra-Wideband-Over-Fiber Systems
Author :
Le Guennec, Yannis ; Gary, René
Author_Institution :
MINATEC, Grenoble
fDate :
7/1/2007 12:00:00 AM
Abstract :
This letter investigates all-optical frequency conversion of ultra-wideband (UWB) signals for UWB-over-fiber up-link and down-link systems. An electrooptical Mach-Zehnder modulator is used in nonlinear regime to realize frequency up and down conversion of UWB rectangular pulse and monocycle. All-optical frequency up-conversion of rectangular pulse at 18 GHz generates undesired local oscillator centered in the up-converted UWB spectrum, whereas up-conversion of monocycle waveform exhibits a power spectrum density optimally fitting the UWB emission mask. Up and down conversions of UWB monocycle, using the same UWB-over-fiber system, have shown low distortion induced by the optical mixing process on the UWB monocycle.
Keywords :
electro-optical modulation; multiwave mixing; optical communication equipment; optical frequency conversion; radio-over-fibre; ultra wideband communication; UWB-over-fiber down-link system; UWB-over-fiber up-link system; all-optical frequency conversion; electrooptical Mach-Zehnder modulator; frequency down conversion; frequency up conversion; local oscillator; millimeter-wave ultra-wideband-over-fiber systems; monocycle waveform; optical mixing process; power spectrum density; rectangular pulse; Frequency conversion; Local oscillators; Nonlinear distortion; Optical distortion; Optical frequency conversion; Optical pulse generation; Optical pulses; Power generation; Pulse modulation; Ultra wideband technology; All-optical microwave mixing; impulse radio; monocycle; radio-over-fiber; ultra-wideband (UWB); ultra-wideband (UWB)-over-fiber;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2007.898745
