International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

For many years, passive optical networks (PONs) have received a considerable amount of attraction regarding their potential for providing broadband connectivity for every user: from the customer’s point of view. However, Internet services providers (ISPs) must rely on producers of technologies to secure data. This article proposes additional opportunities to ensure data protection. PONs use their encapsulation method in optical domain transmissions. That is why it is necessary to solve security questions before optical line termination (OLT). When data are forwarded from the optical to the electrical domain, it is possible to evaluate time with dedicated hardware for optical networks. Own developed system can provide the following features: location of Internet protocol (IP) address, anomaly detection in traffic, ransomware detection based on similar behavior during data transmission, testing of defined address, usage of maps with defin ed IP ranges, providing all information on independent hardware via web page.

The paper focuses on the security of fiber optic infrastructures. The main purpose of the paper is present the vibration detection system for unauthorized access to the fiber optic infrastructure detection. For this purpose, measurement of vibrations using the interferometric method and the measurement based on state of polarization changes evaluation is presented. For the measurement own designed systems were used. Both systems are theoretically described and the principles of use are explained. The measurement was performed at an experimental workplace in a laboratory at the university Based on evaluation measurement both systems are compared in term of sensitivity.

Fiber optic sensors are increasingly widespread and used sensors in many areas of industry and defence. Sensors using fiber Bragg gratings are very accurate sensors of strain and temperature. In this paper we deal with the selection of suitable materials and structures for the implementation of optical fibers with fiber Bragg gratings. The whole process has several key stages – evaluating of adhesives on textile samples, selection of a suitable textile thickness, and design of a multilayer structure of a textile block. The resulting textile block was developed and its basic functional parameters were verified.