METHOD FOR DETERMINING THE OPTICAL POWER LOSS AT CABLE INSERT AT REPAIR OF OPTICAL CABLE IN ASSEMBLED SIMPLE CABLE SECTION Russian patent published in 2001 - IPC

FIELD: measuring equipment. SUBSTANCE: according to the method for determining the optical power loss at a cable insert at repair of fiber-optics communication line in assembled simple cable section, an optical reflectometer is connected to the cable optical fiber on the near end, and the characteristic of backward scattering of optical fiber is measured on the side of the near end. According to the invention, scatterings of optical fiber are connected successively before the damage of the communication line to the cable optical fiber on the two sides of the simple cable section, then the correction to the result of measurement of the optical power loss at the cable insert is found by formulas: at assembling of the cable insert inside the cable face-to-face length Δ = 0, at assembling of the cable insert at the joint of the cable face-to-face length Δ = a_nc-d_cl, where a_nc - the value of optical power loss in the connection of optical fibers at the joint of the cable face-to-face lengths determined by the characteristic of backward scattering of optical fiber measured on the side of the near end before the damage of the communication line, a_cl - the value of optical power loss in the connection of optical fibers at the joint of the cable face-to-face lengths determined by the characteristic of backward scattering of optical fiber measured on the opposite side before the damage of the communication line, and the optical power loss at the cable insert at repair of optics-optics communication line in the assembled simple cable section is determined by formula a = a_n-Δ, where a_n - the value of total optical power loss at the cable insert at repair of optics-optics communication line in the assembled simple cable section determined by the characteristic of backward scattering of optical fiber measured on the side of the near end after assembling of the cable insert. EFFECT: reduced time spent on measurement of optical power loss at the cable insert at repair of optics-optics communication line on assembled simple cable section and reduced measurement error. 1 dwg