• Title : "Transparent performance monitoring of RZ-DQPSK systems employing delay-tap sampling,"
• Author : B.Kozicki, A.Maruta, and K.Kitayama,
• Journal : OSA J.Optical Networking., vol.6, no.11, pp.1257-1269, 2007.
• Abstract: The emerging transparent optical networks, employing spectrally-efficient modulation formats, require new methods for supervision of signal quality in order to maintain control over the transmission in all-optical domains. In this paper optical performance monitoring (OPM) of optical signal-to-noise ratio (OSNR), chromatic dispersion (CD), and polarization-mode dispersion (PMD) in return-to-zero differential quadrature phase-shift keying (RZ-DQPSK) signals is demonstrated using asynchronous delay-tap sampling and pattern recognition algorithms. Precise estimation of parameters over a broad range of impairment levels and good degradation isolation is shown by means of numerical simulation.
• Keywords :

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