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

Volume

8

Issue

9

fYear

1990

fDate

9/1/1990 12:00:00 AM

Firstpage

1379

Lastpage

1386

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;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.59168

Filename

59168