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Optical FM and heterodyne detection of two-channel 560 Mbit/s subcarrier multiplexed ASK signal using three-electrode DFB-LDs

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5 Author(s)
Watanabe, S. ; Fujitsu Labs. Ltd., Kawasaki, Japan ; Yokota, I. ; Naito, T. ; Chikama, T.
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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.

Published in:

Electronics Letters  (Volume:27 ,  Issue: 1 )