Optical frequency domain differential phase shift keying infemtosecond-pulse spectral modulation systems |
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Authors: | Rhee J.-K. Kobayashi H. Warren W.S. |
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Affiliation: | NEC Res. Inst., Princeton, NJ; |
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Abstract: | 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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