Optical Frequency Domain Differential Phase Shift Keying in Femtosecond-Pulse Spectral Modulation Sy - Lightwave Technology, Journal of
نویسندگان
چکیده
We propose a novel scheme of differential phase shift keying (DPSK) in the optical frequency domain. We take advantage of the intrinsic coherence among spectral elements derived by spectrum slicing a femtosecond optical pulse, introducing differential phase modulation between adjacent spectral elements with a femtosecond-pulse shaper. Detection of the differential phase is achieved by a Mach–Zehnder (MZ) or Sagnac interferometric receiver without requirement of any external phase reference.
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