Title :
Consideration on influence of directly modulated DFB LD spectral spread and fiber dispersion in multigigabit-per-second long-span optical-fiber transmission systems
Author :
Henmi, Naoya ; Fujita, Sadao ; Yamaguchi, Masayuki ; Shikada, Minoru ; Mito, Ikuo
Author_Institution :
NEC Corp., Kawasaki, Japan
fDate :
6/1/1990 12:00:00 AM
Abstract :
The relation between optical-fiber dispersion and directly modulated distributed-feedback laser diode (DFB LD) spectral spread in multigigabit-per-second long-span transmission systems is discussed. It is observed that two peak spectra at the leading edge of the pulse induce spectral spread in directly modulated DFB LDs. Specifications for the difference between the DFB LD oscillation wavelength and the optical-fiber zero-dispersion wavelength in a multigigabit-per-second long-span transmission system, considering these two peak spectra, are predicted. Experimental confirmation was provided by 2-Gb/s-140-km and 5-Gb/s-100-km transmission experiments, using 1.5-μm zero-dispersion shifted optical fiber
Keywords :
distributed feedback lasers; optical communication equipment; optical dispersion; optical fibres; optical modulation; semiconductor junction lasers; 1.5 micron; 100 km; 140 km; 2 Gbit/s; 5 Gbit/s; directly modulated DFB LD spectral spread; distributed-feedback laser diode; fiber dispersion; leading edge; long-span optical-fiber transmission systems; multigigabit-per-second; optical-fiber zero-dispersion wavelength; oscillation wavelength; peak spectra; zero-dispersion shifted optical fiber; Chirp modulation; Diode lasers; High speed optical techniques; Optical distortion; Optical fiber dispersion; Optical fibers; Optical modulation; Optical pulses; Optical sensors; Pulse modulation;
Journal_Title :
Lightwave Technology, Journal of
