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 language | English |
---|---|
Pages (from-to) | 223-227 |
Number of pages | 5 |
Journal | Journal of the Optical Society of Korea |
Volume | 20 |
Issue number | 2 |
DOIs | |
State | Published - Apr 2016 |
Keywords
- Balanced detection
- In-band crosstalk
- Phase-shift keying (PSK)
- Single-ended detection