Title :
Coherent FSK transmitter using a negative feedback stabilised semiconductor laser
Author :
Saito, S. ; Nilsson, O. ; Yamamoto, Y.
Author_Institution :
NTT, Musashino Electrical Communication Laboratory, Musashino, Japan
Abstract :
An electrical negative frequency feedback scheme is applied to a semiconductor laser to improve its direct frequency modulation performance in an FSK transmitter. An error signal caused by imperfect FM response is extracted through heterodyne discrimination detection with a stable master laser and fed back to the FM semiconductor laser.
Keywords :
III-V semiconductors; aluminium compounds; feedback; frequency shift keying; gallium arsenide; optical communication equipment; semiconductor junction lasers; FM semiconductor laser; III-V semiconductors; coherent FSK transmitter; direct frequency modulation performance; electrical negative frequency feedback scheme; error signal; heterodyne discrimination detection; imperfect FM response; negative feedback stabilised semiconductor laser; stable master laser;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19840482
