On the long-memory filtering gain in optical high-order QAM transmission systems

Wei Ren Peng, Hidenori Takahashi, Takehiro Tsuritani, Itsuro Morita

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


In this paper, we verify the effectiveness of the last-stage long memory filter (LMF) in mitigating the long-memory response (LMR) of hardware, i.e. the transmitter and receiver. Based on the experimental results, we draw the following conclusions: 1) LMF can effectively mitigate the LMR impact, such as transmitter reflections, and its efficiency is more significant for high-order QAM signals. 2) Using LMF, a partially-correlated pattern exhibits similar performance to that of an uncorrelated pattern both in back-to-back and after 320-km standard single mode fiber (SSMF) transmission. Moreover, a simple solution to the computational complexity of LMF, effective-tap (ET) LMF, is proposed and demonstrated.

Original languageEnglish
Pages (from-to)11021-11030
Number of pages10
JournalOptics Express
Issue number9
Publication statusPublished - 2013 May 6
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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