Abstract
In this letter, we apply high-bandwidth silicon-based integrated coherent Transmit & Receive Optical Sub-Assembly (IC-TROSA) in long-haul fiber transmission systems. G.654E fiber and Raman amplifiers are employed in the fiber link to reduce the transmission loss and the nonlinear interference. In the experimental demonstration, the silicon-based IC-TROSA can provide similar performance as commercial coherent transceivers. In addition, G.654E fiber can achieve longer transmission distance than G.652D fiber. Moreover, 16 Tb/s ( <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$80\times 200$ </tex-math></inline-formula> Gb/s) Nyquist DP-QPSK and 20 Tb/s ( <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$50\times 400$ </tex-math></inline-formula> Gb/s) Nyquist DP-16QAM transmission over 10000 km and 4000 km fiber distance have been successfully achieved under the threshold of soft-decision forward error correction (SD-FEC) codes with 20% overhead, respectively.
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