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Opt Express. 2012 Jan 16;20(2):1790-7. doi: 10.1364/OE.20.001790.

Importance of residual stresses in the Brillouin gain spectrum of single mode optical fibers.

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EDF R&D, 6 Quai Watier 78401 Chatou, France.


Residual stresses inside optical fibers can impact significantly on Brillouin spectrum properties. We have analyzed the importance of internal stresses on the Brillouin Gain Spectrum (BGS) for a conventional G.652 fiber and compared modeling results to measurements. Then the residual internal stresses have been investigated for a set of trench-assisted fibers: fibers are coming from a single preform with different draw tensions. Numerical modeling based on measured internal stresses profiles are compared with corresponding BGS experimental results. Clearly, Brillouin spectrum is shifted linearly versus draw tension with a coefficient of -20MHz/100g and its linewidth increases.

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