Title :
Optical 4-ary FSK modulation and demodulation experiment
Author :
Nakanishi, Kensuke ; Iwashita, Katsushi ; Nakao, Masahiro
Author_Institution :
NTT Labs., Kanagawa
fDate :
10/13/1988 12:00:00 AM
Abstract :
Experimental results of the new 4-ary FSK modulation and demodulation systems are reported. Two binary signals are directly injected into different electrodes of a 3-electrode DFB-LD, producing an optical 4-ary FSK signal with 1 GHz frequency spacing. For demodulation, two differential detectors convert the 4-ary FSK signal into two binary signals
Keywords :
distributed feedback lasers; frequency shift keying; optical modulation; semiconductor junction lasers; DFB-LD; FSK; binary signals; demodulation; differential detectors; electrodes; frequency spacing; modulation; optical 4-ary FSK signal;
Journal_Title :
Electronics Letters
