Title :
Optical FM and heterodyne detection of two-channel 560 Mbit/s subcarrier multiplexed ASK signal using three-electrode DFB-LDs
Author :
Watanabe, Shigetaka ; Yokota, I. ; Naito, Tomoyuki ; Chikama, T. ; Kuwahara, Hideo
Author_Institution :
Fujitsu Labs. Ltd., Kawasaki, Japan
Abstract :
An optical carrier was frequency-modulated by directly modulating a three-electrode DFB laser diode using two-channel 560 Mbit/s subcarrier multiplexed ASK signals, and was transmitted through 122.3 km of single-mode fibre. Both channels were heterodyne-detected and selected simultaneously by a bandpass filter. A receiver sensitivity of -32.4 dBm was obtained and a crosstalk penalty was less than 0.8 dB with channel spacing of 1.8 GHz.
Keywords :
carrier communication; demodulation; digital communication systems; distributed feedback lasers; error statistics; frequency division multiplexing; frequency modulation; laser beam applications; optical fibres; optical links; optical modulation; 122.3 km; 560 Mbit/s; BER; FM; bandpass filter; bit error rates; crosstalk penalty; direction laser modulation; frequency-modulated; heterodyne detection; optical carrier; receiver sensitivity; single-mode fibre; subcarrier multiplexed ASK signal; three-electrode DFB laser diode; two-channel;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19910029
