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Deformation of single-mode optical fibers under static longitudinal stress

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2 Author(s)
Bertholds, A. ; Institut de Microtechnique de 1́universite, Neuchâtel, Switzerland ; Dandliker, R.

The deformation of single-mode fibers resulting from a longitudinally applied static force has been measured experimentally by means of high resolution heterodyne interferometry and analyzed theoretically using the second-order theory of elasticity and the photoelastic effect. Both the elongation of the fiber and the phase change of light propagating through the fiber have been measured as a function of tensile force. The values of the elastic constants measured for fibers with pure silica core and B2O3doped cladding areE = 6.41 times 10^{10}N/m2for the Young's modulus,delta = -4.0for the nonlinearity constant of the longitudinal strain, andbeta = -2.3for the nonlinearity constant of the transverse strain. For unit elongations up to 0.3 percent, no creep, hysterisis, or relaxation effects have been observed within a resolution of one part in 104.

Published in:

Lightwave Technology, Journal of  (Volume:5 ,  Issue: 7 )

Date of Publication:

Jul 1987

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