Vláknová optika

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.

This part of IEC 61280 specifies two main methods for the determination of low BER values by making accelerated measurements. These include the variable decision threshold method (Clause 5) and the variable optical threshold method (Clause 6). In addition, a third method, the sinusoidal interference method, is described in Annex B.

This part of IEC 61300 evaluates the effect of loads which is possible to occur when fibre optic devices are exposed to critical situations such as being stepped on, being run over by vehicle tyres, when an evenly-distributed static load is applied to the top surface of a street cabinet or when a load is applied to a street cabinet’s open door.

This part of IEC 61753-111 contains the minimum tests, test severities and measurement requirements which a sealed fibre optic closure need to meet in order to be categorised as meeting the IEC standard  for Category G – Ground, as defined in Table A.14 of IEC 61753‑1:2018. Free breathing closures are not covered in this standard.

This part of IEC 60794-1 applies to optical fibre cables for use with telecommunications equipment and devices employing similar techniques, and to cables having a combination of both optical fibres and electrical conductors.

An objective of this specification is to define general requirements and methodology guidance applicable to all of the cable test methods of the 60794-1-2 set.

A second objective of this document is to provide the end user with an overview of the different test methods contained in the IEC 60794-1 series numbered -Xnn. Table 1 shows the different parts. 

Table 1 – Document overview

Test methods

IEC reference

Previous compendium reference

Test method category reference letter

General guidance

IEC 60794-1-2

IEC 60794-1-2

-

Mechanical

IEC 60794-1-1nn

IEC 60794-1-21 (2015)

Methods ‘E’

Environmental

IEC 60794-1-2nn

IEC 60794-1-22 (2017)

Methods ‘F’

Cable elements

IEC 60794-1-3nn

IEC 60794-1-23 (2019)

Methods ‘G’

Electrical

IEC 60794-1-4nn

IEC 60794-1-24 (2014)

Methods ‘H’

NOTE 1:  The compendium reference specifications detailed in column 3 continue in force until all of the test methods therein are revised into the single-subject documents using the new numbering scheme.

NOTE 2:  For existing test methods, “nn” is test method number.  For new test methods, “nn” is an incremental number following the last test method number for that test category.

NOTE 3: Several numbers in the test method numbering sequence are missing. The reasons for these omissions are historical. To avoid confusion, the existing numbering sequence has been retained.

These documents define test procedures to be used in establishing uniform requirements for the geometrical, transmission, material, mechanical, ageing (environmental exposure) and climatic properties of optical fibre cables, and electrical requirements where appropriate.

Throughout the documents, the wording "optical cable" can also include optical fibre units, microduct fibre units, etc. 

The secondary objective of this document is to provide the end user with useful guidance when testing optical fibre cables. 

Amendment

Amendment

Amendment

This part of IEC 61290-1 applies to all commercially available optical amplifiers (OA) and optically amplified subsystems. It applies to OA using optically pumped fibres (OFA based on either rare-earth doped fibres or on the Raman effect), semiconductors (SOA), and waveguides (POWA).

NOTE The applicability of the test methods described in the present standard to distributed Raman amplifiers is for further study.

The object of this part of IEC 61290-1 is to establish uniform requirements for accurate and reliable measurements, by means of the optical power meter test method, of the following OA parameters, as defined in IEC 61291-1:

nominal output signal power;

gain;

polarization-dependent gain;

maximum output signal power;

maximum total output power.

NOTE All numerical values followed by (‡) are suggested values for which the measurement is assured. Other values can be acceptable upon verification.

This part of IEC 61290-1 applies to single-channel amplifiers. For multichannel amplifiers, the IEC 61290-10 series applies.

This part of IEC 61300 describes a procedure for determining the suitability of a fibre optic interconnecting device or a passive component to withstand exposure to the optical power which occurs during its operation.