Abstract

Experiments to assess the commercial viability of long-span FSK coherent systems with fiber amplifiers were performed. Transmission spans of 253, 365, and 419 km with integrated shelf-mounted modules have been demonstrated in repeaterless systems and in single-fiber and two-fiber amplifier repeatered systems, respectively.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>

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