Impact of Receiver on In-Band Crosstalk-Induced Penalties in Differentially Phase-Modulated Signals

  • Hu, Qikai ;
  • Kim, Hoon ;
  • Kim, Chul Han
  • Received : 2016.01.25
  • Accepted : 2016.02.23
  • Published : 2016.04.25


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.


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


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Grant : BK21플러스

Supported by : 한국과학기술원