Title :
480-Mbps, Bi-Directional, Ultra-Wideband Radio-Over-Fiber Transmission Using a 1308/1564-nm Reflective Electro-Absorption Transducer and Commercially Available VCSELs
Author :
Thakur, Manoj Prasad ; Quinlan, Terence James ; Bock, Carlos ; Walker, Stuart D. ; Toycan, Mehmet ; Dudley, Sandra E M ; Smith, David W. ; Borghesani, Anna ; Moodie, David ; Ran, Moshe ; Ben-Ezra, Yossef
Author_Institution :
Univ. of Essex, Colchester
Abstract :
We describe 480 Mbps, bi-directional ultra-wideband (UWB) radio signal transmission over 1 km of single-mode optical fiber. Key components are a highly linear, reflective electro absorption transducer (EAT) and commercially available 1308-nm and 1564-nm VCSELs with 4.8-GHz bandwidth. Detailed EAT and 1308-nm VCSEL distortion analyses and measurements are presented highlighting the low intermodulation and harmonic distortion necessary for typical -18-dB wireless channel error vector magnitudes (EVMs). Direct VCSEL modulation with Wimedia supported band group 1 (3.1-4.8 GHz) MB-OFDM UWB signals was modelled with VPItransmissionMaker, suggesting a minimum EVM of -18.733 dB at 0.4502 OMI. This was confirmed by 480 Mbps upstream and downstream EVM measurements over fiber of -21.4 dB or better. Fully functional, half-duplex, bi-directional data transfer was achieved with interlocked RF switches.
Keywords :
electro-optical devices; electroabsorption; harmonic distortion; intermodulation; microwave switches; optical distortion; optical modulation; optical transmitters; radio-over-fibre; surface emitting lasers; ultra wideband communication; EAT; EVM measurement; MB-OFDM UWB signal; VCSEL modulation; VPItransmissionMaker; Wimedia supported band group; bandwidth 3.1 GHz to 4.8 GHz; bi-directional UWB radio signal transmission; bi-directional data transfer; bit rate 480 Mbit/s; half-duplex data transfer; harmonic distortion; interlocked RF switch; intermodulation; reflective electro absorption transducer; single-mode optical fiber; ultra-wideband radio-over-fiber transmission; wavelength 1308 nm; wavelength 1564 nm; wireless channel error vector magnitude; Bandwidth; Bidirectional control; Distortion measurement; Electromagnetic wave absorption; Harmonic distortion; Intermodulation distortion; Optical fibers; Transducers; Ultra wideband technology; Vertical cavity surface emitting lasers; Reflective electro absorption modulator (REAT); VCSEL; ultra-wideband (UWB) radio;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2008.2005644
