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The digital coherent receiver, which is a combination of a phase-diversity optical homodyne receiver and digital signal processing (DSP), can demodulate any multilevel coded optical signals without relying upon an optical phase-locked loop. However, the maximum symbol rate processed by such a receiver is limited by the speed of electric analog-to-digital converters and digital signal processors. Although...
We demonstrate stable generation of a 10-GHz 2-ps optical pulse train from 1530 to 1555 nm based on an optical comb generator. Such pulse train is multiplexable to 160 Gbit/s.
We demonstrate an all fiber-based OTDM receiver incorporating clock recovery and demultiplexing functions using short lengths of bismuth oxide-based nonlinear fiber and erbium-doped bismuth oxide fiber. Error-free, overall operation is achieved at 80 Gbit/s and the clock recovery is also shown to be operable at 160 Gbit/s.
We propose a simple optoelectronic time-division demultiplexer based on selective spectral shift and spectral filtering, with which good demultiplexing characteristics are confirmed at 40 Gbit/s.
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