Title :
Design techniques for subcarrier multiplexed broadcast optical networks
Author :
Walker, Stuart D. ; Li, Mingxing ; Boucouvalas, Anthony C. ; Cunningham, David G. ; Coles, Alistair N.
Author_Institution :
Dept. of Electron. Syst. Eng., Essex Univ., Colchester, UK
fDate :
9/1/1990 12:00:00 AM
Abstract :
Design techniques which enable the performance of subcarrier multiplexed FM broadcast optical networks to be optimized at the planning stage are described. At the transmitter node, criteria for maximizing the subscriber carrier-to-noise ratio (CNR) are presented. At the subscriber node, it is shown that under the majority of circumstances, the optimum direct detection receiver consists of a low-noise III-V avalanche photodiode and high-impedance front-end preamplifier. Sensitivities approaching -40 dB (1 mW) for 16.5 dB CNR in 36 MHz subscriber bandwidth are predicted for a 60-channel system. Preliminary experimental tests on an optical-feedback subcarrier receiver showed -34 dB (1 mW) sensitivity at 1.55 μm from 16.5 dB CNR in a 36 MHz bandwidth centered on 1.2 GHz with a 12% modulation index single-channel FM test signal
Keywords :
broadcasting; carrier communication; frequency modulation; multiplexing; optical communication equipment; optical links; receivers; 1.2 GHz; 1.55 micron; 16.5 dB; 36 MHz; CNR; FM broadcast optical networks; III-V semiconductor; direct detection receiver; high-impedance front-end preamplifier; low-noise III-V avalanche photodiode; modulation index; optical-feedback subcarrier receiver; planning; sensitivities; single-channel FM test signal; subcarrier multiplexing; subscriber carrier-to-noise ratio; subscriber node; transmitter node; Bandwidth; Broadcasting; Design optimization; Optical design; Optical design techniques; Optical fiber networks; Optical receivers; Optical sensors; Optical transmitters; Testing;
Journal_Title :
Selected Areas in Communications, IEEE Journal on
