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Tunable multiple-quantum-well distributed-Bragg-reflector lasers as tunable narrowband receivers

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4 Author(s)
Koch, T.L. ; AT&T Bell Labs., Holmdel, NJ, USA ; Choa, F.S. ; Heismann, F. ; Koren, U.

Reports a tunable receiver based on a MQW-DBR laser biased just below threshold. The device simultaneously integrates the functions of a tunable filter, optical amplifier, photodetector and, if desired, an FSK discrimination. Using identical devices for both a transmitter and a receiver, we demonstrate FSK transmission up to 250 Mbit/s with sensitivities in the approximately -30 dBm range for 10-9 BER. Speed is limited by the transmitter FM response, and independent speed measurements indicate a detection bandwidth of at least 1.7 GHz.

Published in:

Electronics Letters  (Volume:25 ,  Issue: 14 )