Reliability of Optical Cable under Gradual Failures Taking into Account the Degree of Fiber Degradation

The article discusses a method for calculating the availability factors of optical fiber under conditions of reliable control of the technical state of the system. In the simulation, in addition to latent gradual failures, the aging degradation of the optical fiber is taken into account. The matrix method is used to calculate the system reliability indicators. The presented Markov model of the system is implemented by means of computer modeling. Based on the calculation results, the types of systems with a certain set of reliability characteristics, which require taking into account the intensity of damage accumulation in optical fiber as a result of degradation in their modeling, are determined. The article also considers the dependence of the maximum allowable load on the optical fiber on such variables as the value of the critical value of the probability of fiber destruction, accepted by the owner of the infrastructure, and the desired time of the optical fiber operation until reaching the critical value of the probability of fiber destruction. Restricting the load on the optical fiber within the maximum allowable value will ensure the required lifetime of the optical fiber.