"Experimental demonstration of optical performance monitoring for RZ-DPSK signals using delay-tap sampling method,"
- Title :
"Experimental demonstration of optical performance monitoring for RZ-DPSK signals using delay-tap sampling method,"
- Author :
B.Kozicki, A.Maruta, and K.Kitayama,
- Journal :
to appear in Optics Express.
- Abstract: The emerging transparent optical networks, employing spectrally-efficient modulation formats require new methods for supervision of signal quality in the optical domain. In this paper we demonstrate the optical performance monitoring (OPM) of optical signal-to-noise ratio (OSNR) and chromatic dispersion (CD) in return-to-zero differential phase-shift keying (RZ-DPSK) signals using asynchronous delay-tap sampling and pattern recognition algorithms. We experimentally show noise measurement of OSNR from 8.7 dB to 32 dB with low optical input power requirement. Moreover, the residual CD can be evaluated in range from -600 ps/nm to +600 ps/nm. The results indicate that careful adjustment of delay is necessary in order to ensure accurate measurement.
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