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A novel chromatic dispersion (CD) monitoring method by using the cross-correlation function for wavelength division multiplexed (WDM) system has been demonstrated. The monitoring method is easy to implement and monitoring sensitivity is high.
A chromatic dispersion (CD) monitoring method for differential phase-shift keying (DPSK) signals using an optical delay interferometer with phase error has been demonstrated. This method can be used for CD monitoring and discriminate dispersion polarity.
We proposed and demonstrated the optical frequency-hopping system for long distance secure communications. 10.6-Gb/s error-free transmission through 20-km DSF and 40-km SMF was implemented in a 2-frequency-hopping system.
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