DETERMINATION OF PARAMETERS FOR ASSESSING THE TECHNICAL CONDITION OF FIBER-OPTICAL COMMUNICATION LINES’ ELEMENTS

Abstract

In the article for the assessment of the technical condition (TC) of fiber-optical communication lines’ (FOCL) elements, it is proposed to determine the parameter-criterion of their parametric failure (PCF). Therefore in the article it is proposed to define the parameters for assessing the technical condition of fiber optic communication lines’ elements by distributing the total energy reserve in the regeneration section of fiber optic transmission systems (FOTS) between the elements of the communication line. In known works on the reliability of FOCL and its elements, the determination and assessment of their technical condition are only partially covered. The currently accepted levels of the parameter-criterion for failure of the optical signal attenuation of elements are equal to the permissible (nominal) values ​​of these elements from the technical specifications, and do not take into account energy reserves for compensation of attenuation due to aging of elements. It is allowed establishing a functional relation between the permissible (nominal) values ​​of signal attenuation in each FOCL element and the maximum permissible values ​​of signal attenuation A in these elements due to their aging. It is proposed to adopt these maximum permissible values ​​A in each of the FOCL elements as parametric failure criteria parameters. According to the results of calculating the PCF on the regeneration sections of the FOTS of the hierarchy levels STM-1, STM-4, STM-16 and STM-64 in order to determine and assess the technical condition of the FOCL elements, it was established that the average values ​​of аpcf=1.105аni (at the temperature of 20 °C) should be chosen as the levels of the parameter-criterion for failure of the elements for optical signal attenuation. The determined levels of the parameter-criteria of failure of the elements of the communication line for optical signal attenuation can be used to assess the technical condition of various FOCL elements.