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

Volume

21

Issue

15

fYear

2009

Firstpage

1033

Lastpage

1035

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);

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2009.2022174

Filename

4912326