Title :
Wide-band lightwave distribution system using subcarrier multiplexing
Author :
Darcie, T.E. ; Iannone, P.P. ; Kasper, B.L. ; Talman, J.R. ; Burrus, C.A. ; Baker, T.A.
Author_Institution :
AT&T Bell Lab., Holmdel, NJ, USA
fDate :
6/1/1989 12:00:00 AM
Abstract :
A description is given of a bidirectional lightwave distribution system based on subcarrier multiplexing. Eight independent wideband channels (180 Mb/s/channel) are transmitted from the head-end on one 1.3-μm wavelength laser as frequency-shift-keyed (FSK) subcarriers, between 2.6 and 4.7 GHz. Each receiving node uses a parallel-resonant p-i-n FET receiver, a microwave bandpass filter and a limiter-discriminator demodulator to select and demodulate the appropriate channel. A 45-Mb/s return channel is provided from each node to the head-end on a separate subcarrier frequency. Error-free bidirectional transmission is obtained without penalties from laser nonlinearities, optical reflections or interference, or interchannel interference from closely spaced subcarrier channels
Keywords :
frequency shift keying; optical communication equipment; receivers; 1.3 micron; 2.6 to 4.7 GHz; 45 Mbit/s; FSK; bidirectional lightwave distribution system; closely spaced subcarrier channels; demodulate; error-free bidirectional transmission; frequency-shift-keyed subcarriers; head-end; independent wideband channels; interchannel interference; interference; laser; laser nonlinearities; limiter-discriminator demodulator; microwave bandpass filter; optical reflections; parallel-resonant p-i-n FET receiver; receiving node; select; subcarrier frequency; subcarrier multiplexing; wide-band lightwave distribution system; Band pass filters; Demodulation; Frequency shift keying; Interchannel interference; Masers; Microwave FETs; Optical receivers; Optical reflection; PIN photodiodes; Wideband;
Journal_Title :
Lightwave Technology, Journal of
