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

Jun-sen Lai; Ai-ying Yang; Lin Zuo; Yu-nan Sun; Long-quan Chen; Yao-jun Qiao

doi:10.1117/1.OE.51.6.065001

4 June 2012 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

Jun-sen Lai, Ai-ying Yang, Lin Zuo, Yu-nan Sun, Long-quan Chen, Yao-jun Qiao

Author Affiliations +

Optical Engineering, Vol. 51, Issue 6, 065001 (June 2012). https://doi.org/10.1117/1.OE.51.6.065001

Abstract

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.

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Jun-sen Lai, Ai-ying Yang, Lin Zuo, Yu-nan Sun, Long-quan Chen, and Yao-jun Qiao "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," Optical Engineering 51(6), 065001 (4 June 2012). https://doi.org/10.1117/1.OE.51.6.065001

Published: 4 June 2012

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KEYWORDS

Modulators

Eye

Transmitters

Modulation

Picosecond phenomena

Signal detection

Distortion

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