Title :
Performance of directly modulated DFB lasers in 10-Gb/s ASK, FSK, and DPSK lightwave systems
Author :
Vodhanel, Richard S. ; Elrefaie, Aly F. ; Iqbal, M.Z. ; Wagner, Richard E. ; Gimlett, James L. ; Tsuji, Shinji
Author_Institution :
Bellcore, Red Bank, NJ, USA
fDate :
9/1/1990 12:00:00 AM
Abstract :
A comparison is presented of the performance of amplitude-shift-keying (ASK), frequency-shift keying (FSK), and differential-phase-shift-keying (DPSK) lightwave systems which operate at 10 Gb/s with directly modulated 1550-nm distributed feedback (DFB) laser transmitters and conventional 1310-nm dispersion-optimized fiber. Computer modeling techniques were used to accurately simulate the amplitude modulation response and the frequency modulation response of DBF lasers. The system performance is evaluated from simulated eye patterns for both direct and heterodyne detection. With the narrow-optical spectral widths of these signal formats, fiber chromatic dispersion limits up to 70 km were obtained for transmission at 1550-nm using conventional 1310-nm optimized fiber
Keywords :
amplitude modulation; digital communication systems; distributed feedback lasers; frequency shift keying; optical communication equipment; optical links; phase shift keying; 10 Gbit/s; 1310 nm; 1550 nm; amplitude modulation response; amplitude-shift-keying; computer modelling techniques; differential phase shift keying lightwave systems; directly modulated DFB lasers; dispersion-optimized fiber; distributed feedback laser transmitters; fiber chromatic dispersion; frequency modulation response; frequency-shift keying; heterodyne detection; narrow-optical spectral widths; signal formats; simulated eye patterns; system performance; Amplitude modulation; Amplitude shift keying; Computational modeling; Differential quadrature phase shift keying; Distributed feedback devices; Fiber lasers; Frequency shift keying; Laser feedback; Laser modes; Transmitters;
Journal_Title :
Lightwave Technology, Journal of
