IEC 60876-1-2014 pdf download.Fibre optic interconnecting devices and passive components – Fibre optic spatial switches – Part 1: Generic specification.
This part of IEC 60876 applies to fibre optic switches possessing all of the following general features:
– they are passive in that they contain no optoelectronic or other transducing elements;
– they have one or more ports for the transmission of optical power and two or more states in which power may be routed or blocked between these ports;
– the ports are optical fibres or fibre optic connectors.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
IEC 60027 (all parts), Letter symbols to be used in electrical technology
IEC 60050-731 , International Electrotechnical Vocabulary – Chapter 731: Optical fibre communication
IEC 6061 7 (all parts), Graphical symbols for diagrams (available at <http://std.iec.ch/iec6061 7>)
IEC 60695-1 1 -5, Fire hazard testing – Part 11-5: Test flames – Needle-flame test method – Apparatus, confirmatory test arrangement and guidance
IEC 60825-1 , Safety of laser products – Part 1: Equipment classification and requirements
IEC 61 300 (all parts), Fibre optic interconnecting devices and passive components – Basic test and measurement procedures
IEC TR 61 930, Fibre optic graphical symbology
IEC 62047-1 , Semiconductor devices – Micro-electromechanical devices – Part 1: Terms and definitions
ISO 1 29-1 , Technical drawings – Indication of dimensions and tolerances – Part 1: General principles
ISO 286-1 , Geometrical product specifications (GPS) – ISO code system for tolerances on linear sizes – Part 1: Basis of tolerances, deviations and fits
ISO 1 1 01 , Geometrical product specifications (GPS) – Geometrical tolerancing – Tolerances
of form, orientation, location and run-out
ISO 8601 , Data elements and interchange formats – Information interchange –
Representation of dates and times
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60050-731 , together
with the following, apply.
3.1 Basic terms and definitions
3.1.1 port
optical fibre or fibre optic connector attached to a passive component for the entry and/or exit of optical power
3.1.2 transfer matrix
optical properties of a fibre optic switch can be defined in a n × n matrix of coefficients (n is the number of ports)
Note 1 to entry: The T matrix represents the on-state paths (worst-case transmission) and the T° matrix represents the off-state paths (worst-case isolation).
3.1.3 transfer coefficient
element t ij or t° ij of the transfer matrix
Note 1 to entry: Each transfer coefficient t ij is the worst-case (minimum) fraction of power transferred from port i to port j for any state with path ij switched on. Each coefficient t° ij is the worst-case (maximum) fraction of power transferred from port i to port j for any state with path ij switched off.IEC 60876-1 pdf download.