Fibre optic interconnecting devices and passive components - Fibre optic fixed filters - Generic specification

IEC 61977:2020 RLV contains both the official IEC International Standard and its Redline version. The Redline version is not an official document, it is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition.

IEC 61977:2020 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