Study on the Impact of Nonlinearity and Noise on the Performance of High-Capacity Broadband Hybrid Raman-EDFA Amplified System

被引：26

作者：

Galdino, Lidia ^{[1
]}

Semrau, Daniel ^{[1
]}

Ionescu, Maria ^{[1
,2
]}

Edwards, Adrian ^{[1
,2
]}

Pelouch, Wayne ^{[1
,2
]}

Desbruslais, Steve ^{[2
,3
]}

James, Jeanne ^{[2
]}

Sillekens, Eric ^{[1
]}

Lavery, Omanic ^{[1
]}

Barnes, Stuart ^{[1
,2
]}

Killey, Robert, I ^{[1
]}

Bayvel, Polina ^{[1
]}

机构：

[1] UCL, Dept Elect & Elect Engn, Opt Networks Grp, London WC1E 7JE, England

[2] Xtera, Romford RM3 0SD, Essex, England

[3] Steve Desbreslais Tech Serv, London, England

来源：

JOURNAL OF LIGHTWAVE TECHNOLOGY | 2019年 / 37卷 / 21期

基金：

英国工程与自然科学研究理事会;

关键词：

Bandwidth; Signal to noise ratio; Throughput; Optical noise; Gain; Transceivers; Modulation; Adaptive rate LDPC decoder; broadband transmission system; high order modulation format; hybrid raman-EDFA amplifier; TRANSMISSION; MODEL;

D O I：

10.1109/JLT.2019.2933246

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We experimentally demonstrated the transmission of 312 35GBd DP-256QAM over 9 70km spans using hybrid distributed Raman-EDFA (HRE) amplifiers with a continuous 91nm gain bandwidth. A total throughput of 120Tbit/s over 630km is demonstrated, with a net achievable information rate after SD-FEC of 10.99bit/symbol. An extensive, theoretical investigation of the noise contributions originating from amplifier, transceiver sub-system and fiber nonlinearity were carried out using the Gaussian noise model in the presence of inter-channel stimulated Raman scattering (ISRS GN model). The ISRS GN model accounts for arbitrary, wavelength dependent signal power profiles along fiber spans, which is vital for the modeling of ultra-wideband transmission, particularly for hybrid Raman-amplified links. The analysis serves to quantify the relative noise contributions and explain the performance achieved. It was found that, due to the low noise HRE amplifier and a transmission distance of 630km, the noise originating from the transceiver sub-system imposed a penalty of 6dB in SNR. For this system, the transceiver noise is, therefore, the main limitation to the system throughput.

引用

页码：5507 / 5515

页数：9

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