Timing misalignment monitoring between the data modulator and the pulse carver in return-to-zero on-off keying systems using half-symbol delay tap sampling.

Autor:	Jun-sen Lai, Ai-ying Yang, Long-quan Chen, Yao-jun Qiao, Lin Zuo, Yu-nan Sun
Předmět:	LIGHT modulators OPTICAL transmitters LIGHT transmission FIBER optics OPTICAL communications
Zdroj:	Optical Engineering; Jun2012, Vol. 51 Issue 6, p1-4, 4p
Abstrakt:	A novel method using half-symbol delay tap sampling technique for monitoring timing misalignment between data modulator and pulse carver in 33% duty-cycle return-to-zero on-off keying (RZ-OOK), 50% duty-cycle RZ-OOK, and carrier-suppressed RZ-OOK optical transmitters is proposed and experimentally demonstrated. The presented scheme is able to not only identify three RZ-OOK signals but also determine both the timing misalignment magnitude and direction. The effectiveness of the proposed scheme is validated by simulation and experiment in 10-Gbps optical systems, and its robustness against imperfections of the transmitter is also analyzed. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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