| 摘要 |
A demodulator includes a 1xm optical coupler and one or more optical device sets. The 1xm optical coupler splits an input signal comprising symbols to yield m signals comprising m/2 pairs of signals. An optical device set is associated with a pair of signals and includes one or more first optical operators, one or more second optical operators, and a set coupler. The first optical operators direct a first signal of a pair of signals along a first path, and the second optical operators direct a second signal of the pair along a second path. The second path introduces a symbol delay between the first signal and the second signal. The set coupler receives the first and the second signal to generate interference. The interference indicates a phase shift between a phase corresponding to a symbol and a successive phase corresponding to a successive symbol.
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