74.38 Tb/s Transmission Over 6300 km Single Mode Fiber with Hybrid EDFA/Raman Amplifiers

Abstract

Transmission of 306×35 GBd, dual polarization, 64-ary geometrically shaped channels over 90×70 km of SMF was demonstrated, achieving a net throughput of 74.38 Tb/s. A combination of hybrid fiber spans and EDFA/Raman amplifiers enabled a continuous gain bandwidth of 10.8 THz.

Candidate Technologies for Ultra-wideband Nonlinear Optical Fibre Transmission System

“…capacacity transmission systems Several milestones of record data throughput using single mode fibre (SMF) [1][2][3][4][5][6][7][8][9][10][11][12] have been reported over the last few years. Fig.…”

“…1, illustrates records data through over distance achieved using different amplification technologies. Aside of [1], where a capacity of 74 Tbit/s over 6300km was achieved using hybrid distributed Raman/EDFA (HRE) amplification scheme, all trans-Atlantic and trans-Pacific record data throughput to date was achieved by using C+L band EDFAs. Despite HREs having a lower noise figure compared with EDFAs, this amplification technology is not as power efficient as EDFA systems, which makes it less attractive for long-haul submarine systems that are electrical power feed constrained.…”

Increasing achievable information rates with pilot-based DSP in standard intradyne detection

“…The GS constellation was designed using a gradient descent algorithm to maximise generalised mutual information (GMI) at an SNR of 28 dB (see Fig. 4) [17]. GMI was chosen as the target metric as it provides an upper bound to information rate under the assumption of a binary soft-decision decoder [18].…”

Hard-Decision Coded Modulation for High-Throughput Short-Reach Optical Interconnect

“…The challenge is to jointly design the geometry of the constellation and the mapping strategy. This problem has attracted attention in both academia [ 17 , 27 , 28 , 29 , 30 , 31 ] and industry [ 32 , 33 , 34 ].…”