In this paper, the principle of distributed optical fiber measurement and measurement of axial stress is\nintroduced by analyzing the principle of Brillouin scattering in an optical fiber with a certain power. Making the\nexperimental device, measuring the individual strain model, analyzing the wave shape of the scattered wave, and\npreliminary understanding of the image characteristics of the stress in the optical fiber Brillouin scattering spectrum.\nThe effect of stress on the different position of the fiber, and the difference between them and the scattering waveform\nobtained from the stress free action poetry are compared, and the effect of the light pulse on the optical fiber\ntransmission is studied. The results show that the effect of the stress is different in the position of the action, and the\neffect of the propagation of the pulse light is mainly affected by the Stokes and anti Stokes light scattering. The\nresearch can provide reference for distributed optical fiber measurement, and it can promote the application of\ndistributed optical fiber in measuring micro deformation. The innovative point of this study is to use the pulley\nmethod to solve the effect of the different position of the same stress in the distribution of optical fiber.
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