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Accurate BER evaluation for lumped DPSK and OOK systems with PMD and PDL.

Authors
  • Zhang, Zhongxi
  • Chen, Liang
  • Bao, Xiaoyi
Type
Published Article
Journal
Optics Express
Publisher
The Optical Society
Publication Date
Jul 23, 2007
Volume
15
Issue
15
Pages
9418–9433
Identifiers
PMID: 19547288
Source
Medline
License
Unknown

Abstract

New forms using Dirac bra-ket notations and their transformations to express electrically filtered currents are presented for optical systems using either binary differential phase-shift keying (2-DPSK) or ON-OFF keying (OOK) with lumped first-order PMD and PDL, arbitrary optical and electrical filtering and pulse shaping. Based on these forms, the moment generating functions (MGFs) and bit-error-ratios (BERs) for different systems are obtained. Our results show that, for a given BER, 2-DPSK requires ~ 5dB lower input signal-to-noise ratio than OOK. By comparing BERs for different polarization systems, we also show that the PDL-induced partially polarized noise can significantly improve system performance and reduce BER variation caused by the random couplings between signal polarization, PDL and PMD vectors.

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