Impact of receiver on in-band crosstalk-induced penalties in differentially phase-modulated signals

Qikai Hu, Hoon Kim, Chul Han Kim

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

The impact of optical receiver configuration on in-band crosstalk-induced penalty has been investigated in both theoretical and experimental analyses, for differential phase-shift keying (DPSK) and differential quadrature phase-shift keying (DQPSK) signals. Previously it has been shown that DPSK signals are ~6 dB more tolerant to in-band crosstalk than on-off keying (OOK) signals. However, we find that the tolerance difference between the two signals is reduced to ~3 dB when the decision threshold of the receiver is optimized to minimize the bit-error rate for each signal. Then we derive simple equations for the in-band crosstalk-induced penalty in DPSK and DQPSK signals with two different optical receiver configurations: balanced and single-ended direct-detection receivers. We confirm that the penalties obtained from our simple equations agree well with the measured results.

Original languageEnglish
Pages (from-to)223-227
Number of pages5
JournalJournal of the Optical Society of Korea
Volume20
Issue number2
DOIs
StatePublished - Apr 2016

Keywords

  • Balanced detection
  • In-band crosstalk
  • Phase-shift keying (PSK)
  • Single-ended detection

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