Distributed Raman amplification speeds communication

Juan Diego Ania-Castañón*, Sergei K. Turitsyn, Stanislav Chernikov

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Distributed Raman amplification, a key technology for future long-distance high-capacity terrestrial optical communication links, can increase system performance and expand the range of operating wavelengths. In the process of stimulated Raman scattering (SRS), a pump photon gives up its energy to create a new photon at the signal wavelength, plus some residual energy that is absorbed by the fiber in the form of phonons. Distributed amplification introduces less amplified spontaneous emission noise in the communication channel, allowing for longer amplification spans and overall transmission distances. An ideal link without no apparent loss would effectively offer the best trade-off between accumulated nonlinearities and optical signal-to-noise ratio. The improved OSNR in such links could be used to increase the reach or the capacity per channel.

Original languageEnglish
Pages (from-to)79-82
Number of pages4
JournalLaser Focus World
Issue number6
Publication statusPublished - 1 Jun 2006


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