Pulse reflectometers OTDR (Optical Time Domain Reflectometer) operate on a similar principle, which is used in reflectometers for testing electrical cables. Reflectometer submits a powerful light pulse into the optical fiber ), as well as an electrical reflectometer submits powerful …

There are two methods of measuring the loss in the optical fibers which, in accordance with G. 651 and G. 652, is considered the reference - fiber breakup method and the method of insertion loss. The loss measurements are made …

Passive Components Fiber-optic communication lines are divided into the following types:

• optic connectors and splitters;
• optical converters;
• optical isolators;
• optical switches.

Splitters

The most important passive components are FOL optic connectors and splitters, which are used for consolidation or separation …

Installation of couplings

Mounting of couplings shall be in accordance with installation instructions for the particular type of coupling of the manufacturer (supplier) couplings. Connection of optical fiber mounting couplings should be carried out under the control of the welding …

Introduction

Currently, the Russian market is widely featured products, both domestic and foreign manufacturers of optical couplings for installation of cables. Widely known and used clutch of such manufacturers as: Raychem (Belgium), Reichle & DeMassari (Switzerland), RXS / Simens (Germany), …

Basic concepts and definitions

The most responsible operation in the process of construction of fiber-optic, predetermining the quality and range is the installation of optical fibers. Such a combination of fibers and installation cables are produced in the manufacturing process …

Classification of fiber optic cables

Fiber-optic cables (FOC) - a cable products, containing a number of optical fibers and the reinforcing member enclosed in a common envelope, on top of which, depending on the operating conditions of the protective cover …

Distinguish mode dispersion, which is caused by a large number of modes in the optical fiber and the chromatic dispersion associated with the incoherence of light sources actually operating in a certain range of wavelengths.

Consider the propagation of the …

The most important parameters are the optical fiber loss and attenuation of the transmitted energy. These parameters define the range of the FOC and on its effectiveness. Attenuation in optical fibers due to manifestation of the following losses:

α _{c …}

Depending on the number of the operating frequency propagating waves (modes) of the fibers and is separated into one multimode. The number of modes is dependent on the ratio of the diameter of the fiber core and the wavelength for …