| 摘要 |
Method and apparatus for demodulating one or more channels of an optical differential phase shift keyed (DPSK) signal with a symbol rate of SR using an athermal optical delay interferometer with a free spectral range (FSR) of 50 GHz/2<SUP>N</SUP>, and (0.8xSR)<FSR<(1.3xSR), where N=0, 1, 2 . . . .
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