Title :
Multigigabit subcarrier multiplexed coherent lightwave system
Author :
Hill, Paul M. ; Olshansky, Robert
Author_Institution :
GTE Lab. Inc., Waltham, MA, USA
fDate :
11/1/1992 12:00:00 AM
Abstract :
A wideband coherent detection optical communications system using two microwave subcarriers to transmit 8 Gb/s with a RF bandwidth efficiency of 1 b/s/Hz is described. It is demonstrated that two subcarriers each carrying 4 Gb/s QPSK, compactly spaced at just twice the data rate, can achieve a receiver sensitivity (ηP) of -26.5 dBm with as little as 0.5-dB crosstalk between subcarriers. How the various components affect the overall performance of QPSK-SCM systems, including a CNR model for multichannel systems is discussed
Keywords :
crosstalk; optical links; optical modulation; optical receivers; phase shift keying; sensitivity; subcarrier multiplexing; 4 Gbit/s; 8 Gbit/s; CNR model; QPSK-SCM systems; RF bandwidth efficiency; compactly spaced; crosstalk; data rate; microwave subcarriers; multichannel systems; multigigabit optical links; optical modulation; receiver sensitivity; subcarrier multiplexed coherent lightwave system; wideband coherent detection optical communications system; Bandwidth; Crosstalk; Optical detectors; Optical receivers; Optical transmitters; Quadrature phase shift keying; Radio frequency; Throughput; Time division multiplexing; Wavelength division multiplexing;
Journal_Title :
Lightwave Technology, Journal of
