Abstract
Frequency-division-multiplexed (FDM) optical networks with fast-tuning optical components allow multiple logical connections to be maintained by using a single transmitter and receiver. Heterodyne detection using a fast frequency-hopping local oscillator offers a fast-tuning receiver for such applications. A heterodyne receiver can be more selective and orders o í magnitude faster than conventional optomechanical devices such as piezo-driven Fabry-Perot filters. In this work a heterodyne receiver with a wavelength-tunable local-oscillator (LO) laser is used with a fast-tuning laser transmitter to select arid demodulate either one of two 1.244-Gbit/s signals multiplexed in both time and optical frequency. Channel switching times of <13 ns and channel dwell times of 1.953 µs are demonstrated.
© 1994 Optical Society of America
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