Title :
Impact of laser linewidth on performance of heterodyne single filter FSK system with optical preamplifier
Author :
Gangopadhyay, Ranjan ; Majumder, Satya P.
Author_Institution :
Dept. of E & ECE, Indian Inst. of Technol., Kharagpur, India
Abstract :
A quantitative analysis is provided which shows a significant reduction in the sensitivity of the coherent FSK receiver with a semiconductor optical preamplifier in the presence of laser phase noise. The reduction in sensitivity is about 7.0 dB when the linewidth of the laser is only 4% of the bit rate and is higher for larger values of linewidth.
Keywords :
frequency shift keying; optical communication equipment; receivers; semiconductor junction lasers; sensitivity; bit rate; coherent FSK receiver; coherent FSK receiver sensitivity; heterodyne single filter FSK system; laser linewidth; laser phase noise; semiconductor optical preamplifier;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19911197
