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Optical differential phase shift keying (DPSK) may be considered as a duobinary signal. Considering duobinary coding properties, we show theoretically and experimentally that the complicated Mach-Zehnder modulator used at the receiver side can be replaced by a standard narrow optical filter.
Optical Communication, 2001. ECOC '01. 27th European Conference on (Volume:3 )
Date of Conference: 2001