Title :
W-Band OFDM-RoF system employing optical up-conversion
Author :
Lopes, V. ; Laurencio, P. ; Medeiros, M.C.R.
Author_Institution :
Univ. of Algarve, Faro, Portugal
Abstract :
In this paper, we discuss a specific implementation of W-Band RoF system employing optical up-conversion strategies and direct detection. The approach involves two cascaded commercially available MZMs combined with a distributed feedback (DFB) laser source with a MHz range linewidth. The proposed implementation generates an optical OFDM-modulated subcarrier modulated with 40 QPSK Gbit/s data and an unmodulated optical beating tone spaced by 105 GHz. We focus on analysing the system performance degradation caused by the laser phase noise (PN) and fiber chromatic dispersion (CD) within the OFDM signal bandwidth. It is shown that in such systems PN can be relevant even for relatively short fiber transmission distances.
Keywords :
OFDM modulation; distributed feedback lasers; laser noise; optical fibre dispersion; optical fibre networks; optical modulation; phase noise; quadrature phase shift keying; radio-over-fibre; DFB laser source; MHz range linewidth; MZM; OFDM signal bandwidth; QPSK; W-band OFDM-RoF system; bit rate 40 Gbit/s; direct detection; distributed feedback laser source; fiber CD; fiber chromatic dispersion; fiber transmission distance; frequency 105 GHz; laser PN; laser phase noise; optical OFDM-modulated subcarrier; optical up-conversion strategy; system performance degradation; unmodulated optical beating tone; Fiber lasers; OFDM; Optical fiber dispersion; Optical fibers; Optical modulation; Optical transmitters; W-band; direct detection optical orthogonal frequency-division multiplexing (OFDM) systems; fiber chromatic dispersion; laser phase noise; radio over fiber (RoF);
Conference_Titel :
Transparent Optical Networks (ICTON), 2014 16th International Conference on
Conference_Location :
Graz
DOI :
10.1109/ICTON.2014.6876580
