IEC 61977:2020 pdf free download

IEC 61977:2020 pdf free download Fibre optic interconnecting devices and passive components – Fibre optic fixed filters – Generic specification
This document applies to the family of fibre optic filters. These components have all of thefollowing general features:
they are passive for the reason that they contain no optoelectronic or other transducingelements which can process the optical signal launched into the input port;
they modify the spectral intensity distribution in order to select some wavelengths and inhibitothers;
they are fixed, i.e. the modification of the spectral intensity distribution is fixed and cannotbe 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 followingcategories:
.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).lt is also possible to have a combination of the above categories.
This document provides the generic information including terminology of lEC 61753-04x seriesdocuments.Published lEC 61753-04x series documents are listed in the Bibliography.
This document establishes uniform requirements for optical，mechanical and environmentalproperties.
2Normative references
The following documents are referred to in the text in such a way that some or all of their contentconstitutes requirements of this document. For dated references, only the edition cited applies.
For undated’references,the latestedition of the referenced document (including anyamendments) applies.
IEC 60027 (all parts), Letter symbols to be used in electrical technology
IEC 60050-731,International Electrotechnical Vocabulary(IEV) – Part 731: Optical fibrecommunication (available at http://www.electropedia.org)
IEC 60617,Graphical symbols for diagrams (available at http:l/std.iec.chliec60617)IEC 60825 (all parts)，Safety of laser products
IEC 61300(all parts),Fibre optic interconnecting devices and passive components – Basic testand measurement procedures
IEC TR 61930，Fibre optic graphical symbology
IEC TS 62627-09，Fibre optic interconnecting devices and passive components – Vocabularyfor passive optical devices
ISO 129-1，Technical product documentation(TPD) – Presentation of dimensions andtolerances- Part 1: General principles
ISO 286-1，Geometrical product specifications (GPS) – lSO code system for tolerances onlinear sizes – Part 1: Basis of tolerances, deviations and fits
ISO 1101,Geometrical product specifications(GPS)- Geometrical tolerancing – Tolerances ofform, orientation,location and run-out
ISO 8601-1，Date and time – Representations for information interchange – Part 1: Basic rules
3Terms and definitions
Forthe purpose of this document, terms and definitions given in IEC 60050-731,IECTS 62627-09 and the following apply.
IsO and IEC maintain terminological databases for use in standardization at the followingaddresses:
lEC Electropedia: available at http://www.electropedia.orgl
IsO Online browsing platform: available at http://www.iso.org/obp3.1 Component terms
3.1.1
bandpass filterBPF
fibre optic filter designed to allow signals between two specific wavelengths to pass