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Proceedings Paper

Mitigation of sampling clock drift in asynchronously under-sampled optical bit pattern monitoring
Author(s): Huixing Zhang; Carsten Schmidt-Langhorst; Wei Zhao; Colja Schubert
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Paper Abstract

Asynchronous optical under-sampling in combination with subsequent digital signal processing is an economical approach for characterization of ultrahigh speed optical data signals. In this paper, we propose a digital signal processing technique for bit pattern monitoring of ASK signals, which effectively mitigates the random walk clock drift between the data signal and the sampling source in such asynchronously under-sampling systems. The method is verified by measurements on 40 Gb/s NRZ and 160 Gb/s RZ data signals. A quantitative analysis of the displayed timing jitter is performed.

Paper Details

Date Published: 19 November 2009
PDF: 9 pages
Proc. SPIE 7632, Optical Transmission Systems, Switching, and Subsystems VII, 763205 (19 November 2009); doi: 10.1117/12.852108
Show Author Affiliations
Huixing Zhang, Fraunhofer Heinrich Hertz Institute (Germany)
Xi'an Institute of Optics and Precision Mechanics (China)
Graduate School of Chinese Academy of Sciences (China)
Carsten Schmidt-Langhorst, Fraunhofer Heinrich Hertz Institute (Germany)
Wei Zhao, Xi'an Institute of Optics and Precision Mechanics (China)
Colja Schubert, Fraunhofer Heinrich Hertz Institute (Germany)


Published in SPIE Proceedings Vol. 7632:
Optical Transmission Systems, Switching, and Subsystems VII
Dominique Chiaroni, Editor(s)

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