Title :
Impact of the extinction ratio on the BER performance in directly detected OFDM systems
Author :
Marti, J. ; Gosalvez, J.V. ; Capmany, J.
Author_Institution :
ETSI Telecommun., Univ. Politecnica de Valencia, Spain
Abstract :
The crosstalk induced by considering a non-ideal extinction ratio and its influence on the BER performance in directly detected OFDM are studied in this letter. Also, the finite laser linewidth impairment is considered in the results, and a comparison of both degrading mechanisms is carried out. The results show that a significant reduction of the network capacity may be obtained due to the extra crosstalk level produced by lower extinction ratios in on-off keying (OOK) modulated optical transmissions, even when highly coherent lasers are used.
Keywords :
frequency division multiplexing; laser beams; light coherence; optical crosstalk; optical fibre communication; optical modulation; spectral line breadth; BER performance; OOK modulated optical transmission; crosstalk; degrading mechanisms; directly detected OFDM; directly detected OFDM systems; extinction ratio; extra crosstalk level; finite laser linewidth impairment; highly coherent lasers; lower extinction ratios; network capacity; nonideal extinction ratio; on-off keying; Bit error rate; Chirp modulation; Degradation; Erbium; Extinction ratio; OFDM modulation; Optical crosstalk; Optical modulation; Passive optical networks; Power lasers;
Journal_Title :
Photonics Technology Letters, IEEE
