BS EN 61977:2010 Fibre optic interconnecting devices and passive components. Fibre optic filters. Generic specification
BS EN 61977 is an International Standard which 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 can not 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).
It is also possible to have a combination of the above categories.
BS EN 61977 establishes uniform requirements for optical, mechanical and environmental properties.
Contents of BS EN 61977:
1 Scope
2 Normative references
3 Terms and definitions
3.1 Basic terms
3.2 Component terms
3.3 Performance terms
4 Requirements
4.1 Classification
4.1.1 General
4.1.2 Type
4.1.3 Style
4.1.4 Variant
4.1.5 Assessment level
4.1.6 Normative reference extensions
4.2 Documentation
4.2.1 Symbols
4.2.2 Specification system
4.2.3 Drawings
4.2.4 Test and measurements
4.2.5 Test report
4.2.6 Instructions for use
4.3 Standardisation system
4.3.1 Interface standards
4.3.2 Performance standard
4.3.3 Reliability standard
4.3.4 Interlinking
4.4 Design and construction
4.4.1 Materials
4.4.2 Workmanship
4.5 Performance requirements
4.6 Identification and marking
4.6.1 General
4.6.2 Variant identification number
4.6.3 Component marking
4.6.4 Package marking
4.7 Packaging
4.8 Storage conditions
4.9 Safety
Annex A (informative) Example of filtering technologies
Bibliography