A novel technique for pulse-carver and data alignment monitoring in RZ-DPSK systems using off-center optical filtering
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AbstractA novel technique for monitoring the timing alignment between the pulse carver and the data modulator in return-to-zero differential phase-shift keying systems is proposed and experimentally demonstrated. A simple off-center optical filter is employed to extract optical power for alignment monitoring. Compared with the previous degree of polarization-based monitoring scheme, in which the monitoring power dynamic range (MPDR) is similar to0.2 dB, a larger MPDR of 3.35 dB is achieved within the same timing alignment range of half-bit period, thus achieving a higher monitoring sensitivity. In addition, this simple alignment monitoring scheme features high-speed operation, polarization independence, and easy integration with transmitter for synchronization feedback control.
All Author(s) ListLu GW, Ku YC, Chen LK, Chan CK
Journal nameIEEE Photonics Technology Letters
Volume Number17
Issue Number3
Pages711 - 713
LanguagesEnglish-United Kingdom
Keywordsdifferential phase-shift keying (DPSK); monitoring; synchronization
Web of Science Subject CategoriesEngineering; Engineering, Electrical & Electronic; ENGINEERING, ELECTRICAL & ELECTRONIC; Optics; OPTICS; Physics; Physics, Applied; PHYSICS, APPLIED

Last updated on 2020-09-08 at 04:30