Aydar I. Salikhov

Degradation points detection in optical fiber

In this paper, we propose a new algorithm for monitoring the state of the fiber-optic link using polarization effects. The necessity of this work is because currently in operation is a very large number of fiber-optic cables with expired or expiring operation. This means that they are actively developing microcracks and other local defects. In this paper we propose a method for continuous monitoring of optical fiber communication cables.

Fiber optic to radio-photonic equipment constructive principle for pipeline multiple defect monitor

This paper describes objectives on inner pipeline fault detection device modeling designated to monitor pipeline in real time. Due to high demands to high-speed and miniature measurements of such devices it is suggested to use implementations on the basis of fiber optic and radio-photonic mode of operation. A functional equipment design containing fiber optic generation and complex optic impulses transformation transmitted into radio trunk circuits are developed. Physical implementation of the suggested model is estimated as well as an analytical model for propagation of pilot signal on the basis of the Maxwell system of equations for partially conductive and simultaneously scattering medium.

Fiber optic communication line with controlled redundancy based on transfaser from GaInAs crystal

The article is devoted to the development of an automatic system for switching fiber-optic communication lines to a reserve in the event of emergency situations using switches controlled by a decision device. In the development section, a description of the optical communication line with automatic redundancy is provided by the operation of the decision device using a transfector based on logic elements made on a GaInAs crystal. In the practical part, a simulation of the optical communication line and the decision device with the matched parameters in the OptiSystem program was made. Waveforms and signal patterns of the signal on the main and backup lines are presented.

Detection of splices of optical fibers with low loss

Optical Reflectometer (OTDR-Optical Time Domain Reflectometr) of various types are widely used in almost all stages of the fiber-optic communication systems, from production of fiber optic cable to the construction of fiber-optic communication lines and their operation. OTDR provides a quick and easy diagnosis of the state of fibers, cables and fiber-optic communication lines in general. A new method of analysis allowing visually detect traces of welding with low loss.

Modeling of consecutive local events in fiber-optic lines

The aim of this work is to study the impact of a series of local defects on the transmitted signal. In this paper we propose a new method for correlation analysis of measurement results allowing to increase the accuracy of the search of the local events. This will allow to predict the destruction of the optical fiber to the stage of a complete loss of communication. Also, this method will identify the most difficult sections of the cable laying and to take measures to create the best conditions for their operation. These results are essential for the analysis of the link and provide the best conditions for the transfer of signals with mode division multiplexing (MDM).

Detecting of the series of local effects in fiber-optic communication line using polarization effects and correlation analysis

In this paper we propose a novel method for continuous monitoring of the optical fiber using polarization effects. Nowadays there are many optical cables with expired operational time in use on communication networks. These cables have many actively developing microcracks and other local defects.

Novel transmission-parameters instrumental analysis technique for birefringent optical fibers

The article is devoted to development of a quantitation parameters of the pulse distortion method occurring under the influence of birefringent optical fibers effect. It is analyzed the existing methods of an assessment of those distortions used in communication networks. Developed scheme of measurements allow determining the effective shift and pulse widening for each of the meanings of wave length incoming radiation. This method can be used for the analysis of polarization mode dispersion in wavelength-division networks.

Fiber optic link integrity monitoring system

The manuscript describes the system for monitoring the integrity of fiber-optical link, detection faults on the line with the coordinates of an accident or degradation of the cable. The developed system allows quick identification of problem areas on the line and takes corrective action in a shorter period than at the moment.

Optical fibers identification device for communication lines

In this paper optical fibers identification device for communication lines is developed. The device allows to distinguish optical fibers for rapid determination of the need pair for merging.

Creation of the new optical switch model

In the given article the results of work on creation of the nonlinear optical switch (NOS) model are presented. In the article the switch working environment creation technology with use of polymers is described. Offered polymeric materials possess the expressed dependence of optical properties on external influence.