Chromatic dispersion monitoring using semiconductor optical amplifier

Abstract

An all-optical real-time chromatic dispersion (CD) monitoring technique is proposed and demonstrated for 40 Gbit/s differential phase-shifts keying (DPSK) signal, utilizing the cross modulation effects of semiconductor optical amplifier (SOA). The optical power of the output spectral components, which is from the probe’s frequency up to the signal bandwidth, is used for CD monitoring. This technique provides a wide monitoring range with large variation scale. The impacts of the polarization mode dispersion (PMD) and the optical signal-to-noise ratio (OSNR) on the CD monitoring results are theoretically analyzed and then experimentally investigated, showing that they have slight influence on the monitoring results within a certain range. Furthermore, simulated results for quadrature phase shift keying (QPSK) signal at 80 Gbit/s are also demonstrated, indicating that this technique is suitable for advanced modulated format as well.

Keywords

optical performance monitoring / chromatic dispersion (CD) / semiconductor optical amplifier (SOA) / cross modulation

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Acknowledgements

This work was supported by the National Basic Research Program of China (No. 2011CB301704), the National Science Fund for Distinguished Young Scholars (No. 61125501) and the National Natural Science Foundation of China (NSFC) (Grant No. 61007042).

RIGHTS & PERMISSIONS

2014 Higher Education Press and Springer-Verlag Berlin Heidelberg