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Optical Engineering

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
Author(s): Jun-sen Lai; Ai-ying Yang; Lin Zuo; Yu-nan Sun; Long-quan Chen; Yao-jun Qiao
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Paper 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.

Paper Details

Date Published: 4 June 2012
PDF: 5 pages
Opt. Eng. 51(6) 065001 doi: 10.1117/1.OE.51.6.065001
Published in: Optical Engineering Volume 51, Issue 6
Show Author Affiliations
Jun-sen Lai, Beijing Institute of Technology (China)
Ai-ying Yang, Beijing Institute of Technology (China)
Lin Zuo, Beijing Institute of Technology (China)
Yu-nan Sun, Beijing Institute of Technology (China)
Long-quan Chen, Beijing Univ. of Posts and Telecommunications (China)
Yao-jun Qiao, Beijing Univ. of Posts and Telecommunications (China)

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