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Rayleigh crosstalk in long cascades of distributed unsaturated Raman amplifiers

Rayleigh crosstalk in long cascades of distributed unsaturated Raman amplifiers

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Published

Rayleigh crosstalk caused by the double Rayleigh reflection of a signal is investigated in long systems consisting of distributed Raman amplifiers. A simple equation for the crosstalk-to-signal ratio is presented and it is shown that bidirectional pumping reduces crosstalk. Power penalties arising from the crosstalk are evaluated using a Gaussian crosstalk model.

Inspec keywords: Raman lasers; optical pumping; Rayleigh scattering; optical fibre amplifiers; optical crosstalk; optical fibre communication

Other keywords: long systems; Rayleigh crosstalk; crosstalk-to-signal ratio; distributed Raman amplifier; bidirectional pumping; double Rayleigh reflection; long cascades; power penalties; distributed unsaturated Raman amplifiers; Gaussian crosstalk model

Subjects: Stimulated Raman scattering and spectra; CARS; stimulated Brillouin and stimulated Rayleigh scattering and spectra; Optical communication; Optical communication devices, equipment and systems; Nonlinear optics and devices; Fibre lasers and amplifiers; Brillouin and Rayleigh scattering; other light scattering (condensed matter); Fibre lasers and amplifiers

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