Abstract

We present the first experimental demonstration of a resolvable mode structure with spacing $c∕2nL$ in the RF spectra of ultralong Raman fiber lasers. The longest ever demonstrated laser cavity $(L=84\mathrm{km})$, RF peaks of $\sim 100\mathrm{Hz}$ width and spacing $\sim 1\mathrm{kHz}$ have been observed at low intracavity powers. The width of the peaks increases linearly with growing intracavity power and is almost independent of fiber length.

© 2007 Optical Society of America

Dual-wavelength, ultralong Raman laser with Rayleigh-scattering feedback

A. E. El-Taher, M. Alcon-Camas, S. A. Babin, P. Harper, J. D. Ania-Castañón, and S. K. Turitsyn
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Four-wave-mixing-induced turbulent spectral broadening in a long Raman fiber laser

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Spontaneous pump depolarization in ultralong cavity Raman fiber laser amplifiers

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Spectral broadening in Raman fiber lasers

S. A. Babin, D. V. Churkin, A. E. Ismagulov, S. I. Kablukov, and E. V. Podivilov
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