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Photo-elastic correction factor for fiber strain measurements in a cable under tensile load

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4 Author(s)
Abe, K. ; i/FO Technol., Ont., Canada ; Yoshida, K. ; Daneshvar, O. ; Carr, J.

There has been a large variation among reported values for photo-elastic correction factor (K). The nonlinearity of group index versus strain plot was demonstrated to be the cause of the inconsistency. Based on this finding, it is concluded that the K value should be in the range of 1.26-1.30 when the fiber strain is less than 0.6% and 1.22-1.24 when the strain is in the range of 2-3% regardless of fiber types and measurement wavelengths. As a practical example of strain measurements, a test result for an OPGW was described

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Lightwave Technology, Journal of  (Volume:13 ,  Issue: 1 )