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Impact of Receiver on In-Band Crosstalk-Induced Penalties in Differentially Phase-Modulated Signals
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 Title & Authors
Impact of Receiver on In-Band Crosstalk-Induced Penalties in Differentially Phase-Modulated Signals
Hu, Qikai; Kim, Hoon; Kim, Chul Han;
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 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.
 Keywords
In-band crosstalk;Phase-shift keying (PSK);Balanced detection;Single-ended detection;
 Language
English
 Cited by
 References
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