Title :
Signal improvement effect in O/E-E/O conversion using an electro-absorption (EA) modulator
Author :
Inoue, Kyo ; Jinno, Masahiko
Author_Institution :
NTT Opt. Network Syst. Labs., Kanagawa, Japan
Abstract :
O/E-E/O conversion using an electro-absorption (EA) modulator is described from the viewpoint of noise transfer characteristics, where input optical signals are converted to electrical signals and the EA modulator is driven by the inversely amplified electrical signals. A threshold property in the EA modulation characteristic suppresses signal fluctuation in the input "on"-state, provided that the "on"-level voltage supplied to the modulator exceeds a threshold. Experiments in which amplifier ASE light was intentionally imposed on the signal light showed improvement in allowable ASE level, and confirmed the noise suppression effect.
Keywords :
electro-optical modulation; electroabsorption; error statistics; interference suppression; noise; optical communication equipment; BER; WDM based networks; bit error rate; electrical-to-optical conversion; electro-absorption modulator; inversely amplified electrical signals; modulation characteristic; noise suppression effect; noise transfer characteristics; optical-to-electrical conversion; signal fluctuation suppression; signal improvement effect; threshold property; Amplitude modulation; Bit error rate; Optical amplifiers; Optical attenuators; Optical modulation; Optical noise; Optical receivers; Optical sensors; Optical transmitters; Voltage;
Journal_Title :
Photonics Technology Letters, IEEE
