SIST EN 62077:2016

Fibre optic interconnecting devices and passive components - Fibre optic circulators - Generic specification (IEC 62077:2015)

This International Standard applies to circulators used in the field of fibre optics bearing all of
the following features:
– they are non-reciprocal optical devices, in which each port is either an optical fibre or fibre
optic connector;
– they are passive devices in accordance with the categorization and definition provided in
IEC TS 62538;
– they have three or more ports for directionally transmitting optical power.
An example of optical circulator technology is described in Annex A.

Lichtwellenleiter - Verbindungselemente und passive Bauteile - Lichtwellenleiterzirkulatoren - Fachgrundspezifikation

Dispositifs d’interconnexion et composants passifs à fibres optiques - Circulateurs fibroniques - Spécification générique

IEC 62077:2015 s’applique aux circulateurs utilisés dans le domaine de la fibronique, présentant toutes les caractéristiques suivantes:
· ce sont des dispositifs optiques non réciproques, dont chaque port est soit une fibre optique, soit un connecteur fibronique;
· ce sont des dispositifs passifs, conformément à la classification et à la définition données dans l'IEC TS 62538;
· ils disposent d'au moins trois ports pour la transmission de la puissance optique de façon directionnelle.
Un exemple de technologie pour les circulateurs optiques est décrit en Annexe A. Cette troisième édition annule et remplace la deuxième édition parue en 2010. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: harmonisation de certains termes et définitions avec d'autres spécifications génériques, suppression du niveau d'assurance de la qualité.
Mots clés: circulateurs optiques

Optični spojni elementi in pasivne komponente - Optični cirkulatorji - Rodovna specifikacija (IEC 62077:2015)

Ta mednarodni standard se uporablja za cirkulatorje, ki so v uporabi za optična vlakna in imajo naslednje lastnosti:
– so nerecipročne optične naprave, v katerih so vsaka vrata optično vlakno ali optični konektor;
– so pasivne naprave v skladu z razvrstitvijo in definicijo iz standarda IEC TS 62538;
– imajo tri ali več vrat za usmerjen prenos optične moči.
V dodatku A je opisan primer tehnologije optičnega cirkulatorja.

General Information

• Status: Published
• Publication Date: 03-Mar-2016
• ICS: 33.180.20 - Fibre optic interconnecting devices
• Technical Committee: MOC - Mobile Communications
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 26-Feb-2016
• Due Date: 02-May-2016
• Completion Date: 04-Mar-2016
• Ref Project: EN 62077:2016 - Fibre optic interconnecting devices and passive components - Fibre optic circulators - Generic specification

Relations

• Replaced By: SIST EN IEC 62077:2022 - Fibre optic interconnecting devices and passive components - Fibre optic circulators - Generic specification (IEC 62077:2022)
• Effective Date: 20-Sep-2022
• Revised: SIST EN 62077:2010 - Fibre optic interconnecting devices and passive components - Fibre optic circulators - Generic specification (IEC 62077:2010)
• Effective Date: 03-Feb-2015
• Replaces: SIST EN 62077:2010 - Fibre optic interconnecting devices and passive components - Fibre optic circulators - Generic specification (IEC 62077:2010)
• Effective Date: 16-Feb-2016
• Revised: SIST EN IEC 62077:2022 - Fibre optic interconnecting devices and passive components - Fibre optic circulators - Generic specification (IEC 62077:2022)
• Effective Date: 15-Dec-2020

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 62077:2016
01-maj-2016
1DGRPHãþD
SIST EN 62077:2010
2SWLþQLVSRMQLHOHPHQWLLQSDVLYQHNRPSRQHQWH2SWLþQLFLUNXODWRUML5RGRYQD
VSHFLILNDFLMD,(&

Fibre optic interconnecting devices and passive components - Fibre optic circulators -

Generic specification (IEC 62077:2015)
Ta slovenski standard je istoveten z: EN 62077:2016
ICS:
33.180.20 3RYH]RYDOQHQDSUDYH]D Fibre optic interconnecting
RSWLþQDYODNQD devices
SIST EN 62077:2016 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 62077:2016
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SIST EN 62077:2016
EUROPEAN STANDARD EN 62077
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2016
ICS 33.180.20 Supersedes EN 62077:2010
English Version
Fibre optic interconnecting devices and passive components -
Fibre optic circulators - Generic specification
(IEC 62077:2015)

Dispositifs d'interconnexion et composants passifs à fibres Lichtwellenleiter - Verbindungselemente und passive

optiques - Circulateurs fibroniques - Spécification générique Bauteile - Lichtwellenleiterzirkulatoren -

(IEC 62077:2015) Fachgrundspezifikation
(IEC 62077:2015)

This European Standard was approved by CENELEC on 2015-12-09. CENELEC members are bound to comply with the CEN/CENELEC

Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC

Management Centre or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation

under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the

same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,

Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,

Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN 62077:2016 E
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SIST EN 62077:2016
EN 62077:2016
European foreword

The text of document 86B/3862/CDV, future edition 3 of IEC 62077, prepared by SC 86B "Fibre optic

interconnecting devices and passive components" of IEC/TC 86 "Fibre optics" was submitted to the

IEC-CENELEC parallel vote and approved by CENELEC as EN 62077:2016.
The following dates are fixed:
(dop) 2016-09-09
• latest date by which the document has to be implemented at
national level by publication of an identical national
standard or by endorsement
(dow) 2016-12-09
• latest date by which the national standards conflicting with
the document have to be withdrawn
This document supersedes EN 62077:2010.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such

patent rights.
Endorsement notice

The text of the International Standard IEC 62077:2015 was approved by CENELEC as a European

Standard without any modification.

In the official version, for Bibliography, the following notes have to be added for the standards indicated:

IEC 60068 NOTE Harmonized in EN 60068 series.
IEC 61300-2 NOTE Harmonized in EN 61300-2 series.
IEC 61300-3 NOTE Harmonized in EN 61300-3 series.
IEC 61753 NOTE Harmonized in EN 61753 series.
IEC 61754 NOTE Harmonized in EN 61754 series.
IEC 61978-1 NOTE Harmonized as EN 61978-1.
IEC 62005 NOTE Harmonized in EN 62005 series.
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SIST EN 62077:2016
EN 62077:2016
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

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.

NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod),

the relevant EN/HD applies.

NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is

available here: www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60027 series Letter symbols to be used in electrical EN 60027 series
technology
IEC 60050-731 - International Electrotechnical - -
Vocabulary -
Chapter 731: Optical fibre
communication
IEC 60617 - Graphical symbols for diagrams - -
IEC 60695-11-5 - Fire hazard testing - EN 60695-11-5 -
Part 11-5: Test flames - Needle-flame
test method - Apparatus, confirmatory
test arrangement and guidance
IEC 60825 series Safety of laser products EN 60825 series
IEC 61300 series Fibre optic interconnecting devices and EN 61300 series
passive components - Basic test and
measurement procedures
IEC/TR 61930 - Fibre optic graphical symbology - -
ISO 129-1 - Technical drawings - Indication of - -
dimensions and tolerances -
Part 1: General principles
ISO 286-1 - Geometrical product specifications EN ISO 286-1 -
(GPS) - ISO code system for tolerances
on linear sizes -
Part 1: Basis of tolerances, deviations
and fits
ISO 1101 - Geometrical product specifications EN ISO 1101 -
(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
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SIST EN 62077:2016
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SIST EN 62077:2016
IEC 62077
Edition 3.0 2015-11
INTERNATIONAL
STANDARD
Fibre optic interconnecting devices and passive components – Fibre optic
circulators – Generic specification
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.180.20 ISBN 978-2-8322-2988-0

Warning! Make sure that you obtained this publication from an authorized distributor.

® Registered trademark of the International Electrotechnical Commission
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SIST EN 62077:2016
– 2 – IEC 62077:2015  IEC 2015
CONTENTS

FOREWORD ........................................................................................................................... 4

1 Scope .............................................................................................................................. 6

2 Normative references ...................................................................................................... 6

3 Terms and definitions ...................................................................................................... 7

3.1 Basic terms ............................................................................................................. 7

3.2 Component terms.................................................................................................... 8

3.3 Performance parameters ......................................................................................... 8

4 Requirements ................................................................................................................ 10

4.1 Classification ........................................................................................................ 10

4.1.1 General ......................................................................................................... 10

4.1.2 Type .............................................................................................................. 11

4.1.3 Style .............................................................................................................. 11

4.1.4 Variant ........................................................................................................... 12

4.1.5 Normative reference extensions..................................................................... 12

4.2 Documentation ...................................................................................................... 13

4.2.1 Symbols ........................................................................................................ 13

4.2.2 Specification system ...................................................................................... 13

4.2.3 Drawings ....................................................................................................... 15

4.2.4 Tests and measurements ............................................................................... 15

4.2.5 Test reports ................................................................................................... 16

4.2.6 Instructions for use ........................................................................................ 16

4.3 Standardization system ......................................................................................... 16

4.3.1 Interface standards ........................................................................................ 16

4.3.2 Performance standards .................................................................................. 17

4.3.3 Reliability standards ...................................................................................... 17

4.3.4 Interlinking ..................................................................................................... 18

4.4 Design and construction ........................................................................................ 19

4.4.1 Materials ....................................................................................................... 19

4.4.2 Workmanship ................................................................................................. 19

4.5 Performance ......................................................................................................... 19

4.6 Identification and marking ..................................................................................... 19

4.6.1 General ......................................................................................................... 19

4.6.2 Variant identification number ......................................................................... 19

4.6.3 Component marking ....................................................................................... 20

4.6.4 Package marking ........................................................................................... 20

4.7 Packaging ............................................................................................................. 20

4.8 Storage conditions ................................................................................................ 20

4.9 Safety ................................................................................................................... 21

Annex A (informative) Example of technology of bulk circulator based on magneto-

optic effect ............................................................................................................................ 22

Annex B (informative) Example of application of a circulator ................................................ 23

Bibliography .......................................................................................................................... 24

Figure 1 – Completely circulated type configuration ................................................................ 8

Figure 2 – Incompletely circulated type configuration .............................................................. 8

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SIST EN 62077:2016
IEC 62077:2015  IEC 2015 – 3 –

Figure 3 – Insertion loss ......................................................................................................... 9

Figure 4 – Isolation ................................................................................................................. 9

Figure 5 – Optical circulator style configurations ................................................................... 12

Figure 6 – Standards currently under preparation ................................................................. 18

Figure 7 – Example of a variant identification number ........................................................... 20

Figure A.1 – Example of a circulator ..................................................................................... 22

Figure B.1 – Example of application of a circulator ................................................................ 23

Table 1 – Example of a typical circulator set classification .................................................... 11

Table 2 – The IEC specification structure .............................................................................. 14

Table 3 – Standards interlink matrix ...................................................................................... 19

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SIST EN 62077:2016
– 4 – IEC 62077:2015  IEC 2015
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIBRE OPTIC INTERCONNECTING
DEVICES AND PASSIVE COMPONENTS –
FIBRE OPTIC CIRCULATORS – GENERIC SPECIFICATION
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of IEC is to promote

international co-operation on all questions concerning standardization in the electrical and electronic fields. To

this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,

Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC

Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested

in the subject dealt with may participate in this preparatory work. International, governmental and non-

governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely

with the International Organization for Standardization (ISO) in accordance with conditions determined by

agreement between the two organizations.

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

consensus of opinion on the relevant subjects since each technical committee has representation from all

interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

misinterpretation by any end user.

4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

transparently to the maximum extent possible in their national and regional publications. Any divergence

between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in

the latter.

5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity

assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

services carried out by independent certification bodies.

6) All users should ensure that they have the latest edition of this publication.

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

members of its technical committees and IEC National Committees for any personal injury, property damage or

other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

Publications.

8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

International Standard IEC 62077 has been prepared by subcommittee 86B: Fibre optic

interconnecting devices and passive components, of IEC technical committee 86: Fibre optics.

This third edition cancels and replaces the second edition published in 2010. This edition

constitutes a technical revision.

This edition includes the following significant technical changes with respect to the previous

edition:

a) harmonization of some terms and definitions with other generic specifications,

b) deletion of assessment level.
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SIST EN 62077:2016
IEC 62077:2015  IEC 2015 – 5 –
The text of this standard is based on the following documents:
CDV Report on voting
86B/3862/CDV 86B/3918/RVC

Full information on the voting for the approval of this standard can be found in the report on

voting indicated in the above table.

This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

The committee has decided that the contents of this publication will remain unchanged until

the stability date indicated on the IEC website under "http://webstore.iec.ch" in the data

related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.
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SIST EN 62077:2016
– 6 – IEC 62077:2015  IEC 2015
FIBRE OPTIC INTERCONNECTING
DEVICES AND PASSIVE COMPONENTS –
FIBRE OPTIC CIRCULATORS – GENERIC SPECIFICATION
1 Scope

This International Standard applies to circulators used in the field of fibre optics bearing all of

the following features:

– they are non-reciprocal optical devices, in which each port is either an optical fibre or fibre

optic connector;

– they are passive devices in accordance with the categorization and definition provided in

IEC TS 62538;
– they have three or more ports for directionally transmitting optical power.
An example of optical circulator technology is described in Annex A.
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 (available at http://www.electropedia.org)

IEC 60617, Graphical symbols for diagrams (available at http://std.iec.ch/iec60617)

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

IEC 61300 (all parts), Fibre optic interconnecting devices and passive components

IEC TR 61930, Fibre optic graphical symbology

ISO 129-1, 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 1101, 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
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SIST EN 62077:2016
IEC 62077:2015  IEC 2015 – 7 –
3 Terms and definitions

For the purposes of this document, the terms and definitions given in IEC 60050-731and the

following apply.
3.1 Basic terms
3.1.1
port

optical fibre or optical fibre connector attached to a passive component for the entry and/or

exit of the optical power
3.1.2
transfer matrix

n × n matrix of coefficients where n is the number of ports, and the coefficients represent the

fractional optical power transferred between designated ports
Note 1 to entry: In general, the transfer matrix T is:
t t .... t
 
11 12 1n
 
T = (1)
 
 
t t t
 
 n1 n2 nn 
where

t is the ratio of the optical power P transferred out of port j with respect to input power P into port i, that is:

ij ij i
t = (2)
3.1.3
transfer coefficient
of the transfer matrix
element t
3.1.4
logarithmic transfer matrix

n × n matrix of logarithmic transfer coefficients of a where n is the number of ports

Note 1 to entry: In general, the logarithmic transfer matrix A is:
a a ... a 
11 12 1n
 
 
A = (3)
 
 
a a a
 n1 n2 nn 

where a is the optical power reduction, in decibels, out of port j with unit power into port i, that is:

a = −10log t (4)
ij 10 ij
where t is the transfer matrix coefficient.
3.1.5
conducting port pair
two ports i and j between which t is nominally greater than zero
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SIST EN 62077:2016
– 8 – IEC 62077:2015  IEC 2015
3.1.6
isolated port pair
two ports i and j between which t is nominally zero, and a is nominally infinite
ij ij
3.2 Component terms
3.2.1
fibre optic circulator

passive component possessing three or more ports which input and output are cyclic

Note 1 to entry: In the case of 3 ports circulator with port 1, port 2 and port 3, supposing optical power is

transmitted from port 1 to port 2, optical power from port 2 is transmitted to port 3.

3.2.2
completely circulated type
type of circulator where all ports can function as both input and output.

Note 1 to entry: In the case of a 3 port circulator with port 1, port 2 and port 3, where optical power is transmitted

from port 1 to port 2, optical power from port 2 is also transmitted to port 3 and optical power from port 3 is also

transmitted to port 1 (see Figure 1).
Circulator
port 1 port 3
port 2
IEC
Figure 1 – Completely circulated type configuration
3.2.3
incompletely circulated type
type of circulator where a port is either an input or an output

Note 1 to entry: In the case of 3 ports circulator with port 1, port 2 and port 3, supposing optical power is

transmitted from port 1 to port 2, optical power from port 2 is transmitted to port 3 and optical power from port 3 is

not transmitted to port 1 (see Figure 2).
Circulator
port 1 port 3
port 2
IEC
Figure 2 – Incompletely circulated type configuration
3.3 Performance parameters
3.3.1
insertion loss

element a of the logarithmic transfer matrix of an input port i and output port j to which optical

power is transmitted

Note 1 to entry: The insertion loss is the reduction in optical power between an input and output port of a passive

component (see Figure 3), expressed in decibels and defined as follows:
 
 
(5)
a = −10log
ij 10
 
 
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SIST EN 62077:2016
IEC 62077:2015  IEC 2015 – 9 –
where
P is the optical power launched into the input port;
P is the optical power received from the output port
Supposing optical power is
Circulator
transmitted from port i to port j
input port i
output port j
IEC
Figure 3 – Insertion loss
3.3.2
isolation

element a of the logarithmic transfer matrix of an output port j and input port i to which optical

power is transmitted in the direction opposite to the insertion loss

Note 1 to entry: The isolation is the reduction in optical power between an input and output port of a passive

component, expressed in decibels and defined as follows:
 
 
a = −10log (6)
ji 10
 
 
where
P is the optical power received from the input port;
P is the optical power launched into the output port
Supposing optical power is
Circulator
transmitted from port i to port j
input port i
output port j
IEC
Figure 4 – Isolation
3.3.3
directivity

element a of the logarithmic transfer matrix port i and port k, which are not port pair for

insertion loss (IL), return loss (RL) or isolation (Iso)

Note 1 to entry: For example, the transmission matrix for a 4-port incompletely circulated type optical circulator,

the symbol Dir indicates directivity as in Equation (7).
a a a a
   RL IL Dir Dir
11 12 13 14
 
 
a a a a
Iso RL IL Dir
21 22 23 24
   
(7)
   
a a a a
Dir Iso RL IL
31 32 33 34
   
a a a a Dir Dir Iso RL
 41 42 43 44   
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SIST EN 62077:2016
– 10 – IEC 62077:2015  IEC 2015
where
Dir is the directivity;
IL is the insertion loss;
Iso is the isolation;
RL is the return loss.
3.3.4
operating wavelength

nominal wavelength, λ, at which a passive component is designed to operate with the

specified performance
3.3.5
operating wavelength range

specified range of wavelengths from λ to λ close to a nominal operating wavelength

i min i max

λ , within which a passive component is designed to operate with the specified performance

3.3.6
return loss
element a in Equation (8) of the logarithmic transfer matrix

Note 1 to entry: It is the fraction of the input power that is returned from the input port of a passive component

and defined as:
 P 
refl
  (8)
a = −10log
ii 10
 
 i 
where
P is the optical power launched into the i port;
P is the optical power received back from i port
refl
4 Requirements
4.1 Classification
4.1.1 General
Fibre optic circulators shall be classified as follows:
– type;
– style;
– variant;
– normative reference extensions.
An example of a typical circulator classification is given in Table 1:
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SIST EN 62077:2016
IEC 62077:2015  IEC 2015 – 11 –
Table 1 – Example of a typical circulator set classification
Type: – Three port circulator
– Completely circulated type
– Operating wavelength range: O-band
Style: – Configuration: B
– Connector type: SC
– Fibre type: IEC Category B 1.2
Variants: – Means of mounting
4.1.2 Type
Circulators are mainly divided into types according to their configuration.
• Port numbers;
• Circulated type:
– completely circulated type;
– incompletely circulated type;
• Operational principles:
– magneto-optic Faraday effect;
– magneto-optic Cotton-Mouton effect and Kerr effect;
• Operating wavelength range:
– O-band;
– C-band;
– L-band;
– other wavelength circulators.
4.1.3 Style

Optical circulators may be classified into styles based upon fibre type(s), connector type(s),

cable type(s), housing shape and dimensions, and configuration.

The configuration of the circulator ports is classified as follows (See Figure 5):

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SIST EN 62077:2016
– 12 – IEC 62077:2015  IEC 2015
Circulator
Pigtail Pigtail
Pigtail
IEC

a) Configuration A – Device containing integral fibre optic pigtails without a connector

Circulator
Connector Connector
Connector
IEC

b) Configuration B – Device containing integral fibre optic pigtails, with a connector on each pigtail

Circulator
Connector Connector
Connector
IEC

c) Configuration C – Device containing connectors as an integral part of the device housing

Circulator
Connector
Pigtail
Connector
IEC
d) Configuration D Example – Device containing some combination
of the interfacing features of the preceding configurations
Figure 5 – Optical circulator style configurations
4.1.4 Variant

The circulator variant identifies those common features which encompass structurally similar

components. Examples of features which define a variant include, but are not limited to, the

following:
– position and orientation of ports on housing;
– means of mounting.
4.1.5 Normative reference extensions

Normative reference extensions are used to identify integrated independent standards

specifications or other reference documents as relevant specifications.

Unless otherwise specified, additional requirements of extensions are mandatory. Usage is

primarily intended to merge associated components to form hybrid devices, or integrated

functional application requirements that are dependent on tec
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