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M. R. Chitgarha, S. Khaleghi, W. Daab, A. Almaiman, M. Ziyadi, A. Mohajerin-Ariaei, D. Rogawski, M. Tur, J. D. Touch, V. Vusirikala, W. Zhao, and A. E. Willner, "Demonstration of in-service wavelength division multiplexing optical-signal-to-noise ratio performance monitoring and operating guidelines for coherent data channels with different modulation formats and various baud rates," Opt. Lett. 39, 1605-1608 (2014)
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