IEC 62074-1 pdf download

IEC 62074-1 pdf download Fibre optic interconnecting devices and passive components – Fibre optic WDM devices – Part 1: Generic specification
scope
This part of lEC 62074 applies to fibre optic wavelength division multiplexing (WDM) devices.These have all of the following general features:
They are passive, in that they contain no optoelectronic or other transducing elements; but they may use temperature control only the purpose to stabilize the characteristics ofdevices; they exclude any optical switching function.
They have three or more ports for the entry and/or exit of optical power, and share opticalpower among these ports in a predetermined fashion depending on the wavelength.
The ports are optical fibres or optical fibre connectors.
This standard establishes uniform requirements for the optical, mechanical and environmentalproperties.
2Normative references
The following referenced documents are indispensable for the application of this document.Fordated references,only the edition cited applies. For undated references, the latest edition ofthe referenced document (including any amendments) applies.
IEC 60027(all parts),Letter symbols to be used in electrical technology
IEC 60050(731), International Electrotechnical Vocabulary (IEV) – Chapter 731: Optical fibrecommunication
IEC 60617, International Standard Database Snapshot – Graphical symbols for diagrams
IEC 60695-11-5，Fire hazard testing – Part 11-5: Test flames – Needle-flame test method -Apparatus, confirmatory test arrangement and guidance
IEC 60825(all parts), Safety of laser products
Iso 129-1,Technical drawings – lndication of dimensions amd tolerances – General principlesISO 286-1,
ISO system of limits and fits – Part 1: Bases of tolerances, deviations and fits
Iso 370,Toleranced dimensions – Conversion from inches into millimeters and vice versa
ISO 1101,Geometrical Product Specifications (GPS) – Geometrical tolerancing – Tolerances ofform, orientation,location and run-out
Iso 8601,Data elements and interchange formats – Information interchange – Representationof dates and times
ITU-T Recommendation G.692:1998,Optical interfaces for multichannel systems with opticalamplifiers
3Terms and definitions
For the purposes of this document, the terms and definitions given in lEC 60050(731) and thefollowing apply.
3.1 Basic term definitions
3.1.1
port
optical fibre or optical fibre connector attached to a passive component for the entry and/or exitof the optical power (input andlor output port)
3.1.2
transfer matrix
optical properties of a fibre optic wavelength-selective branching device can be defined interms of an n x n matrix of coefficients,where n is the number of ports,and the coefficientsrepresent the fractional optical power transferred between designated ports
NOTE The detaill explanation of transfer matrix is shown in Annex A.
3.1.3
transfer matrix coefficientelement t of the transfer matrix
NOTE The detail explanation is shown in Annex A.
3.1.4
logarithmic transfer matrix
transfer matrix whose matrix element ajj is a logarithmic value of transfer matrix element ty
NOTE The detail explanation is shown in Annex A.
3.1.5
conducting ports
two ports i and j between which t is nominally greater than zero at a specified wavelength
3.1.6
input/output port pair
conducting ports iand j (t nominally greater than zero) that are isolated from any other ports j(aj nominally infinite).The ports are numbered sequentially，so that the transfer matrix isdeveloped to show all ports and all possible combinations.The port numbering is arbitrary.
NOTE Figure 1 below shows an example of a six-port device,with two input ports and four output ports.