Distributed measurement of intermodal beat length in an elliptic-core two-mode fiber by Brillouin dynamic grating

Yong Hyun Kim; Kwang Yong Song

doi:10.1117/12.2059454

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2 June 2014 Distributed measurement of intermodal beat length in an elliptic-core two-mode fiber by Brillouin dynamic grating

Yong Hyun Kim, Kwang Yong Song

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Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 91573S (2014) https://doi.org/10.1117/12.2059454
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain

Abstract

Optical time-domain measurement and characterization of intermodal beat length in an elliptic-core two-mode fiber (ecore TMF) is demonstrated using Brillouin dynamic grating. A mode-selective coupler is used for selective launch and retrieval of different modes, and the operations of BDG for four different pairs of pump-probe (LP₀₁^x-LP11 ^x, LP₀₁ ^x-LP₁₁ ^y, LP₀₁ ^y-LP₁₁ ^x, LP₀₁ ^y-LP₁₁^y) are observed, representing a fine structure of modal birefringence in the e-core TMF. Distributed measurement of the BDG spectrum is performed for each pair of pump-probe with 1.5 m spatial resolution mapping the difference of the effective refractive indexes of spatial and polarization modes along a 75 m TMF.

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Yong Hyun Kim and Kwang Yong Song "Distributed measurement of intermodal beat length in an elliptic-core two-mode fiber by Brillouin dynamic grating", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91573S (2 June 2014); https://doi.org/10.1117/12.2059454

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