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Optical /spl pi//2-DPSK and its tolerance to filtering and polarization-mode dispersion

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8 Author(s)
Wei, X. ; Bell Labs., Murray Hill, NJ, USA ; Gnauck, A.H. ; Gill, D.M. ; Liu, X.
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Optical /spl pi//2 differential phase-shift keying (/spl pi//2-DPSK) is a modulation technique which encodes the binary information in relative phase shifts of /spl pi//2 and -/spl pi//2 between adjacent optical pulses. Here, we experimentally demonstrate /spl pi//2-DPSK at the bit rate of 42.7 Gb/s. It is found that /spl pi//2-DPSK outperforms conventional DPSK in the presence of strong optical filtering and polarization-mode dispersion (PMD).

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Photonics Technology Letters, IEEE  (Volume:15 ,  Issue: 11 )