In this paper, we review different designs of distributed Raman amplifiers which have been
proposed to minimize the signal power profile asymmetry in mid-link optical phase …

We demonstrate that a distributed Raman amplification scheme based on random
distributed feedback (DFB) fiber laser enables bidirectional second-order Raman pum** …

We present, for the first time, a detailed investigation of the impact of second order co-
propagating Raman pum** on long-haul 100G WDM DP-QPSK coherent transmission of …

We demonstrate that using a broadband, first order, and coherent pump laser enables
effective and efficient forward-pumped distributed Raman amplification for long-haul …

By basing the figure of merit on the joint evaluation of signal bit error rate and optical signal-
to-noise ratio, the design of single-carrier 400 G unrepeatered optical systems using remote …

The intensity fluctuation of a Raman pump laser source will not only transfer to the signal's
intensity through stimulated Raman scattering effect, which has been investigated …

We present a detailed investigation of the singe-channel 100G polarization-multiplexed
quadrature-phase-shift-keying-based unrepeatered coherent transmissions using various …

Performance of distributed Raman amplification (DRA) system with dual order forward (FW)
pum** is analyzed with the consideration of both pump relative intensity noise (RIN) to …

Ultra-long span unrepeatered systems using distributed Raman amplification are cost-
effective solutions for bridging moderate transmission distances. However, there are two …

We demonstrate a novel broadband first-order pump which enables forward-propagated
distributed Raman amplification by mitigating RIN-related penalty and reducing ASE noise …