Transmission performance improvement using random DFB laser based Raman amplification and bidirectional second-order pumping

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We demonstrate that a distributed Raman amplification scheme based on random distributed feedback (DFB) fiber laser enables bidirectional second-order Raman pumping without increasing relative intensity noise (RIN) of the signal. This extends the reach of 10 × 116 Gb/s DP-QPSK WDM transmission up to 7915 km, compared with conventional Raman amplification schemes. Moreover, this scheme gives the longest maximum transmission distance among all the Raman amplification schemes presented in this paper, whilst maintaining relatively uniform and symmetric signal power distribution, and is also adjustable in order to be highly compatible with different nonlinearity compensation techniques, including mid-link optical phase conjugation (OPC) and nonlinear Fourier transform (NFT).

Original languageEnglish
Pages (from-to)2215-2221
Number of pages7
JournalOptics Express
Issue number3
Early online date27 Jan 2016
Publication statusPublished - 8 Feb 2016


Bibliographical note

© 2016 Optical Society of America. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modifications of the content of this paper are prohibited.

Funding: EPSRC programme grant UNLOC (EP/J017582/1; MSC IF
grant CHAOS (No. 658982); and FP7 ITN programme ICONE (No. 608099)

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