Title :
Linewidth-insensitive coherent AM analog optical links using semiconductor lasers
Author :
Fong, Thomas K. ; Sabido, Delfin Jay M, IX ; Kazovsky, Leonid G.
Author_Institution :
Star Lab., Stanford Univ., CA, USA
fDate :
4/1/1993 12:00:00 AM
Abstract :
Coherent AM analog optical links are analyzed taking into account laser phase noise. With the optimum selection of the IF bandwidth, coherent AM links can be made essentially independent of the laser linewidth. Under shot-noise-limited conditions, the fundamental limit of the dynamic range (FLDR) for coherent links is 148 dB-Hz per 1 mW of the received optical power versus 151 dB-Hz/mW for conventional direct detection links. However, when the received optical power is less than 1 mW, coherent links can improve the dynamic range by some 7 dB as compared to direct detection links.<>
Keywords :
amplitude modulation; optical links; random noise; semiconductor device noise; semiconductor lasers; spectral line breadth; 1 mW; FLDR; IF bandwidth optimum selection; coherent AM analog optical links; dynamic range fundamental limit; laser linewidth; laser phase noise; linewidth insensitivity; received optical power; semiconductor lasers; shot-noise-limited conditions; Additive noise; Bandwidth; Dynamic range; Laser noise; Optical fiber communication; Optical filters; Optical noise; Optical receivers; Phase noise; Semiconductor lasers;
Journal_Title :
Photonics Technology Letters, IEEE
