3760km, 100G SSMF Transmission over Commercial Terrestrial DWDM ROADM Systems using SD-FEC

Abstract

We report error-free, 47x80km transmission of a real-time, 120Gbps, coherent PM-QPSK MSA transceiver with soft-decision forward-error-correction. Two cascaded commercial systems included 40G neighbors and ten ROADMs. The transceiver compensated 60,000ps/nm and had 2.5dB remaining margin.

A Robust Real-Time 100G Transceiver With Soft-Decision Forward Error Correction [Invited]

“…The 100G transceiver performance has been measured in two separate long-haul DWDM transmission systems, the first with 100 Gb/s neighboring channels [9] and the second with 40 Gb/s neighbors [10]. These experiments were designed to test the tolerance of the transceiver and its FEC threshold to single-channel and multiple-channel nonlinearities occurring in G.652 SSMF systems.…”

“…A recent paper reported the first real-time 120 Gb/s PM-QPSK industry-compliant transceiver module with integrated SD-FEC based on TPC and characterized its dense wavelength division multiplexing (DWDM) transmission performance [9]. The transceiver was then utilized in a commercial ultra-long-haul transmission system with reconfigurable optical add-drop multiplexers and neighboring 40 Gb/s channels [10]. In this follow-up paper we provide further details on the performance of the 120 Gb/s transceiver including its tolerance to various linear and nonlinear transmission impairments.…”

Multi-Dimensional Coded Modulation in Long-Haul Fiber Optic Transmission

“…Over the past 5 years, this growing demand, together with a minimum transmission cost imperative, rely heavily on digital coherent transceiver technology. Commercial long-haul optical transmission systems now operating at 2 bits/s/Hz spectral efficiency (SE) are based on polarization division multiplexing (PDM) and quadrature phase shift keying (QPSK) modulation [1][2][3]. Deployment of even higher SE is projected to be the next step to further increase the capacity of optical systems.…”

Real-time digital signal processing for coherent optical systems

“…Advanced modulation formats associated with coherent detection are the main new key ingredients that have come into the optical communications industry [2]. This has enabled to overcome the 40 Gb/s barrier in terms of optical channel bit-rates, leading to the development and current commercialization of 100G optical transceivers, capable of covering transoceanic communication distances [3]. Boosted by coherent detection, the full potential of digital signal processing (DSP) in optical communication systems has been released, initiating a new era of digital optical communication systems.…”