Title :
Directly Modulated Laser Driven by Low-Bandwidth Duobinary Signals
Author :
Al-Qazwini, Zaineb ; Kim, Hoon
Author_Institution :
Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore, Singapore
Abstract :
We report on the generation of 10-Gb/s nonreturn-to-zero signals using a directly modulated laser driven by 9B/10B line-coded, 3.5-GHz-bandwidth duobinary signals. The ternary frequency-modulated signals from the laser are converted into binary intensity-modulated signals by a delay interferometer (DI). Two schemes, one using the constructive port of the DI and the other using the destructive port, are demonstrated through experiment.
Keywords :
delays; frequency modulation; light interferometers; optical communication; optical modulation; optical transmitters; bandwidth 3.5 GHz; binary intensity modulated signal; bit rate 10 Gbit/s; constructive port; delay interferometer; destructive port; directly modulated laser; low bandwidth duobinary signals; nonreturn-to-zero signal; ternary frequency modulated signal; Amplitude shift keying; Bandwidth; Delay; Frequency conversion; Frequency modulation; Frequency shift keying; Intensity modulation; Optical signal processing; Optical transmitters; Signal generators; Delay interferometer (DI); direct modulation; directly modulated laser (DML); frequency modulation; line coding;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2010.2054074
