Cycle-slip-less low-complexity phase recovery algorithm for coherent optical receivers

Valery Nobl Rozental, Deming Kong, Benjamin Foo, Bill Corcoran, Arthur James Lowery

Research output: Contribution to journalArticleResearchpeer-review

3 Citations (Scopus)


We propose and experimentally validate a blind phase recovery algorithm based on tracking low-frequency components of the phase noise, which we call “filtered carrier-phase estimation (F-CPE).” Tracking only the low-frequency components allows F-CPE to reduce the computational complexity by using a frequency-domain equalizer and to simplify the partitioning of a 16 quadrature amplitude modulation (16QAM) constellation. Further, this approach eliminates cycle slips by suppressing the impact of amplified spontaneous emission on phase noise estimation. The experimental results demonstrate cycle-slip-free operation for 15 and 32 GBd 16QAM signals. Additionally, the proposed method showed similar or better sensitivity compared with the blind-phase-search algorithm, near standard forward error correction thresholds of modern wavelength division multiplexing systems.

Original languageEnglish
Pages (from-to)3554-3557
Number of pages4
JournalOptics Letters
Issue number18
Publication statusPublished - 15 Sep 2017

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