Vláknová optika

This part of IEC 60794 is a family specification covering optical fibre indoor cables that deployed in short length (≤ 10 m) outdoor environments. These cables generally possess the characteristics associated with indoor cable designs having the appropriate fire performance and flexibility that makes them suitable for use in premises. Because of its predicted use outdoors stability against environmental attack e.g. UV radiation and humidity (see Table 1, IEC 60794-6) is required. Typical application spaces include the extension of a short length of indoor cable outside the building such as to a NAP mounted outside the building at the house wall.

This part of IEC 60794 is a family specification covering optical fibre outdoor cables which are flame retardant and thus also applicable to indoor environments. These cables generally possess the characteristics associated with outdoor cable designs having similar thermal and mechanical robustness that makes them suitable for use in the outside plant, while simultaneously exhibiting the fire performance required in indoor premises. Typical application spaces are: e.g. extension of a “shorter length” of an outdoor cable into the building.

This part of IEC 60794 is a family specification covering features of optical fibre cables applicable to outdoor as well as indoor environments: so called “Universal Indoor-Outdoor cables”. These cables generally possess the characteristics associated with outdoor cable designs (according to IEC 60794-3 however typically less stringent, typically “non armoured”) having the thermal and mechanical robustness that makes them suitable for use in the outside plant, while simultaneously being flexible enough, compact and lightweight and exhibiting the fire performance required in indoor premises.  A typical application is e.g. the centralized cabling in central office, the Premises or Local Area Network where the same cable design is used for the entire length of the cabling link including both the indoor as well as the outdoor portions.

This part of IEC 60794 is a sectional specification covering general features of optical fibre cables applicable to outdoor as well as indoor environments: so called “indoor-outdoor cables”. Indoor-Outdoor cables are deployed in outside plant environment as well as in premises and thus fulfilling outdoor as well as indoor requirements. Typical application spaces are: e.g. extension of a duct cable into a building or using this design for centralized cabling in the central office, the Premises or Local Area Network where the same cable is used for the entire length of the cabling link including both the indoor as well as the outdoor portions.

Cables of which generally possess the characteristics associated with outdoor cable designs having the thermal and mechanical robustness that makes them suitable for use in the outside plant, while simultaneously being relatively flexible, compact and lightweight while exhibiting the fire performance required in indoor premises are specified in IEC 60794-6-10.

Flame Retardant Outdoor cables (see IEC 60794-6-20) are used when most of the cable length is deployed as an outdoor cable with a part of its length is deployed indoors. The cable design can be derived from a typical outdoor cable design according to the product specifications described in IEC 60794-3. The specific demand related to bend radii according to the installation situation and fire performance according to the regional legislation mainly requires the appropriate selection of the jacket material in combination with other material and / or design considerations.

Because of the use in buildings with tighter space restrictions, higher flexibility of the cable is often required for the installation. Often lower diameter cables are to be preferred.

Indoor cables which are weatherised (see IEC 60794-6-30) are used when an indoor cable is to be used outdoors over a short distance (few meters) e.g. when the network access point, NAP, is very close to the building. The indoor-outdoor fibre optical cable design can be derived from an indoor design (see IEC 60794-2 and IEC TR 62901 for typical applications) with specific outdoor performance features added. Critical parameters are UV stability, and resistance against exposure to humidity.

This document applies to the family of fibre optic filters. These components have all of the following general features:

they are passive for the reason that they contain no optoelectronic or other transducing elements which can process the optical signal launched into the input port;

they modify the spectral intensity distribution in order to select some wavelengths and inhibit others;

they are fixed, i.e. the modification of the spectral intensity distribution is fixed and cannot be tuned;

they have input and output ports or a common port (having both functions of input and output) for the transmission of optical power; the ports are optical fibre or optical fibre connectors;

they differ according to their characteristics. They can be divided into the following categories:

short-wave pass (only wavelengths lower than or equal to a specified value are passed);

long-wave pass (only wavelengths greater than or equal to a specified value are passed);

band-pass (only an optical window is allowed);

notch (only an optical window is inhibited);

gain flattening (compensating the spectral profile of the device).

It is also possible to have a combination of the above categories.

This document provides the generic information including terminology of IEC 61753-04x series documents. Published IEC 61753-04x series documents are listed in the Bibliography.

This document establishes uniform requirements for the following:

optical, mechanical and environmental properties.