Title :
Impact of Modulator Bias on the OSNR Requirement of Direct-Detection Optical OFDM
Author :
Leibrich, Jochen ; Ali, Abdulamir ; Paul, Henning ; Rosenkranz, Werner ; Kammeyer, Karl-Dirk
Author_Institution :
Dept. of Commun., Univ. of Kiel, Kiel, Germany
Abstract :
In optical orthogonal frequency-division multiplexing (OFDM) with direct detection, modulator bias voltage has a significant impact on receiver sensitivity. It is a compromise between control of carrier power and nonlinear distortion of the OFDM signal. In this letter, sensitivity improvement due to reduction of carrier power is treated analytically. Its range of validity is examined by simulation. The impact of nonlinearity is identified as the difference in sensitivity between a linear and a nonlinear model.
Keywords :
OFDM modulation; nonlinear distortion; optical distortion; optical modulation; optical receivers; Mach-Zehnder modulator; OSNR requirement; direct-detection optical OFDM; modulator bias voltage; nonlinear distortion; nonlinear model; optical orthogonal frequency-division multiplexing; receiver sensitivity; Direct detection; Mach–Zehnder modulator (MZM); optical modulation formats; optical orthogonal frequency-division multiplexing (OOFDM);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2009.2022174
