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Clock and carrier recovery in high-speed coherent optical communication systems

Amado, S. B. ; Guiomar, F. P. ; Ziaie , S. ; Teixeira, A. ; Muga, N. J. ; Pinto, A. N.

Clock and carrier recovery in high-speed coherent optical communication systems, Proc II International Conf. on Applications of Optics and Photonics - AOP, Aveiro, Portugal, Vol. 1, pp. 1 - 7, May, 2014.

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Abstract
n this paper, the implementations of clock and carrier recovery in digital domain are analyzed. Hardware implementation details, resources estimation and real-time results are presented. Analog-to-Digital Converters (ADC), operating at 1.25Gsa/s, and a Virtex-6 Field-Programmable Gate Array (FPGA), have been used, allowing the implementation of a real-time Quadrature Phase Shift Keying (QPSK) system operating at 1.25Gb/s. The real-time mode operation is successfully demonstrated over 80 km of Standard Single Mode Fiber (SSMF).