Fibre optic interconnecting devices and passive components - Performance standard - Part 061-2: Single-mode fibre optic pigtailed style polarization independent isolators for category C - Controlled environments

IEC 61753-061-2:2020 is available as IEC 61753-061-2:2020 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 61753-061-2:2020 contains the minimum test and measurement requirements and severities which a fibre optic isolator as specified by IEC 61202-1 satisfies in order to be categorized as meeting the requirements of isolators used in controlled environments as specified in IEC 61753-1. The requirements cover single-mode pigtailed style polarization independent isolators for category C used in controlled environments. This second edition cancels and replaces the first edition published in 2012 and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- addition of the detail high optical power test procedures and the condition in Annex B;
- change of test conditions harmonizing with IEC 61753-1:2018;
- addition of category CHD;
- addition of the detailed measurements conditions in Annex C;
- change of clause structure accordance with the latest ISO/IEC Directives, Part 2.

Dispositifs d'interconnexion et composants passifs fibroniques - Norme de performance - Partie 061-2 : Isolateurs fibroniques à fibres unimodales munis de fibres amorces non connectorisées pour la catégorie C - Environnements contrôlés

IEC 61753-061-2:2020 est disponible sous forme de IEC 61753-061-2:2020 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.
IEC 61753-061-2:2020 contient les sévérités et les exigences minimales de mesure et d'essai auxquelles un isolateur fibronique tel que spécifié dans l'IEC 61202-1 est tenu de satisfaire afin d'être considéré comme conforme aux exigences des isolateurs utilisés dans des environnements contrôlés tel que spécifié dans l'IEC 61753-1. Les exigences couvrent les isolateurs à fibres unimodales munis de fibres amorces non connectorisées pour la catégorie C utilisés dans des environnements contrôlés. Cette deuxième édition annule et remplace la première édition parue en 2012 et constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- ajout des détails et des conditions des procédures d'essai à puissance optique élevée dans l'Annexe B;
- modification des conditions d'essai en harmonisation avec l'IEC 61753-1:2018;
- ajout de la catégorie CHD;
- ajout des conditions de mesure détaillées dans l'Annexe C;
- modification de la structure des articles conformément aux dernières Directives ISO/IEC, Partie 2.

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Publication Date
08-Apr-2020
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IEC 61753-061-2:2020 - Fibre optic interconnecting devices and passive components - Performance standard - Part 061-2: Single-mode fibre optic pigtailed style polarization independent isolators for category C - Controlled environments
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IEC 61753-061-2
Edition 2.0 2020-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fibre optic interconnecting devices and passive components – Performance
standard –
Part 061-2: Single-mode fibre optic pigtailed style polarization independent
isolators for category C – Controlled environments
Dispositifs d'interconnexion et composants passifs fibroniques – Norme de
performance –
Partie 061-2: Isolateurs fibroniques à fibres unimodales munis de fibres amorces
non connectorisées pour la catégorie C – Environnements contrôlés
IEC 61753-061-2:2020-04(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 61753-061-2
Edition 2.0 2020-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fibre optic interconnecting devices and passive components – Performance
standard –
Part 061-2: Single-mode fibre optic pigtailed style polarization independent
isolators for category C – Controlled environments
Dispositifs d'interconnexion et composants passifs fibroniques – Norme de
performance –
Partie 061-2: Isolateurs fibroniques à fibres unimodales munis de fibres amorces
non connectorisées pour la catégorie C – Environnements contrôlés
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.10 ISBN 978-2-8322-8108-6

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

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – IEC 61753-061-2:2020 © IEC 2020
CONTENTS

FOREWORD ........................................................................................................................... 3

1 Scope .............................................................................................................................. 5

2 Normative references ...................................................................................................... 5

3 Terms and definitions ...................................................................................................... 6

4 Test ................................................................................................................................. 6

5 Test report ....................................................................................................................... 7

6 Performance requirements............................................................................................... 7

6.1 Sample size ............................................................................................................ 7

6.2 Test details and requirements ................................................................................. 7

Annex A (normative) Sample size ........................................................................................ 15

Annex B (normative) High power test procedure of fibre optic isolators ................................ 16

B.1 General ................................................................................................................. 16

B.2 Forward input test ................................................................................................. 16

B.2.1 Forward input test set-up ............................................................................... 16

B.2.2 Forward input test procedure ......................................................................... 16

B.3 Backward input test .............................................................................................. 17

B.3.1 Backward input test set-up............................................................................. 17

B.3.2 Backward input test procedure ....................................................................... 17

B.4 Both direction input test ........................................................................................ 17

B.4.1 Both direction input test set-up ...................................................................... 17

B.4.2 Both direction input test procedure ................................................................ 18

Annex C (informative) Example of detailed measurement conditions including test

details and requirements ....................................................................................................... 19

Bibliography .......................................................................................................................... 21

Figure B.1 – Test set-up of forward input test........................................................................ 16

Figure B.2 – Test set-up of the backward input test............................................................... 17

Figure B.3 – Test set-up of both direction input test .............................................................. 18

Table 1 – Single-mode spectral bands .................................................................................... 7

Table 2 – Test details and requirements for category C .......................................................... 8

Table 3 – Test details and requirements for category C .................................................... 11

Table A.1 – Sample size ....................................................................................................... 15

Table C.1 – Example of detailed measurement conditions..................................................... 19

Table C.2 – Example of detailed measurement conditions for before, during (if required)

and after the environmental tests .......................................................................................... 20

---------------------- Page: 4 ----------------------
IEC 61753-061-2:2020 © IEC 2020 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIBRE OPTIC INTERCONNECTING DEVICES AND
PASSIVE COMPONENTS – PERFORMANCE STANDARD –
Part 061-2: Single-mode fibre optic pigtailed style
polarization independent isolators for category C –
Controlled environments
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

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

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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 61753-061-2 has been prepared by subcommittee 86B: Fibre optic

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

This second edition cancels and replaces the first edition published in 2012 and constitutes a

technical revision.

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

edition:

a) addition of the detail high optical power test procedures and the condition in Annex B;

b) change of test conditions harmonizing with IEC 61753-1:2018;
c) addition of category C ;
d) addition of the detailed measurements conditions in Annex C;

e) change of clause structure accordance with the latest ISO/IEC Directives, Part 2.

---------------------- Page: 5 ----------------------
– 4 – IEC 61753-061-2:2020 © IEC 2020
The text of this International Standard is based on the following documents:
FDIS Report on voting
86B/4270/FDIS 86B/4284/RVD

Full information on the voting for the approval of this International Standard can be found in the

report on voting indicated in the above table.

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

A list of all parts of the IEC 61753 series, published under the general title Fibre optic

interconnecting devices and passive components – Performance standard, can be found on the

IEC website.

Future standards will carry the new general title as cited above. Titles of existing standards in

this series will be updated at the time of the next edition.

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

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

the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
---------------------- Page: 6 ----------------------
IEC 61753-061-2:2020 © IEC 2020 – 5 –
FIBRE OPTIC INTERCONNECTING DEVICES AND
PASSIVE COMPONENTS – PERFORMANCE STANDARD –
Part 061-2: Single-mode fibre optic pigtailed style
polarization independent isolators for category C –
Controlled environments
1 Scope

This part of IEC 61753 contains the minimum test and measurement requirements and

severities which a fibre optic isolator as specified by IEC 61202-1 satisfies in order to be

categorized as meeting the requirements of isolators used in controlled environments as

specified in IEC 61753-1. The requirements cover single-mode pigtailed style polarization

independent isolators for category C used in controlled environments.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies.

For undated references, the latest edition of the referenced document (including any

amendments) applies.

IEC 60793-2-50, Optical fibres – Part 2-50: Product specifications – Sectional specification for

class B single-mode fibres

IEC 60794-2-50, Optical fibre cables – Part 2-50: Indoor cables – Family specification for

simplex and duplex cables for use in terminated cable assemblies

IEC 61202-1, Fibre optic interconnecting devices and passive components – Fibre optic

isolators – Part 1: Generic specification

IEC 61300-2-1, Fibre optic interconnecting devices and passive components – Basic test and

measurement procedures – Part 2-1: Tests – Vibration (sinusoidal)

IEC 61300-2-4, Fibre optic interconnecting devices and passive components – Basic test and

measurement procedures – Part 2-4: Tests – Fibre or cable retention

IEC 61300-2-5, Fibre optic interconnecting devices and passive components – Basic test and

measurement procedures – Part 2-5: Tests – Torsion

IEC 61300-2-9, Fibre optic interconnecting devices and passive components – Basic test and

measurement procedures – Part 2-9: Tests – Shock

IEC 61300-2-14, Fibre optic interconnecting devices and passive components – Basic test and

measurement procedures – Part 2-14: Tests – High optical power

IEC 61300-2-17, Fibre optic interconnecting devices and passive components – Basic test and

measurement procedures – Part 2-17: Tests – Cold

IEC 61300-2-18, Fibre optic interconnecting devices and passive components – Basic test and

measurement procedures – Part 2-18: Tests – Dry heat – High temperature endurance

---------------------- Page: 7 ----------------------
– 6 – IEC 61753-061-2:2020 © IEC 2020

IEC 61300-2-19, Fibre optic interconnecting devices and passive components – Basic test and

measurement procedures – Part 2-19: Tests – Damp heat (steady state)

IEC 61300-2-22, Fibre optic interconnecting devices and passive components – Basic test and

measurement procedures – Part 2-22: Tests – Change of temperature

IEC 61300-2-42, Fibre optic interconnecting devices and passive components – Basic test and

measurement procedures – Part 2-42: Tests – Static side load for strain relief

IEC 61300-2-44, Fibre optic interconnecting devices and passive components – Basic test and

measurement procedures – Part 2-44: Tests – Flexing of the strain relief of fibre optic devices

IEC 61300-3-2, Fibre optic interconnecting devices and passive components – Basic test and

measurement procedures – Part 3-2: Examinations and measurements – Polarization
dependence loss in a single-mode fibre optic device

IEC 61300-3-3, Fibre optic interconnecting devices and passive components – Basic test and

measurement procedures – Part 3-3: Examinations and measurements – Active monitoring of

changes in attenuation and return loss

IEC 61300-3-7, Fibre optic interconnecting devices and passive components – Basic test and

measurement procedures – Part 3-7: Examinations and measurements – Wavelength
dependence of attenuation and return loss of single mode components

IEC 61300-3-28, Fibre optic interconnecting devices and passive components – Basic test and

measurement procedures – Part 3-28: Examinations and measurements – Transient loss

IEC 61300-3-32, Fibre optic interconnecting devices and passive components – Basic test and

measurement procedures – Part 3-32: Examinations and measurements – Polarization mode

dispersion measurement for passive optical components

IEC TS 62627-09, Fibre optic interconnecting devices and passive components – Vocabulary

for passive optical devices
3 Terms and definitions

For the purposes of this document, the terms and definitions given in IEC 61202-1 and

IEC TS 62627-09 apply.

ISO and IEC maintain terminological databases for use in standardization at the following

addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
4 Test

All test methods are in accordance with a specific standard of the IEC 61300 series, of which

parts applicable to this document are mentioned in 6.2 (see Table 2 and Table 3).

The samples shall be terminated onto single-mode fibres as per IEC 60793-2-50 category

B-652.B, B-652.D or B-657 in either coated fibres (primary and secondary) or reinforced cable

format as per IEC 60794-2-50.
---------------------- Page: 8 ----------------------
IEC 61753-061-2:2020 © IEC 2020 – 7 –

Table 1 is intended to provide guidance on the wavelength ranges of the various spectral bands.

It is not intended for specification. Values of operating wavelength used in performance

verification shall be specified between the customer and supplier or shall be as defined in the

manufacturer’s specification.
Table 1 – Single-mode spectral bands
Band Descriptor Range
nm
O-band Original 1 260 to 1 360
E-band Extended 1 360 to 1 460
S-band Short wavelength 1 460 to 1 530
C-band Conventional 1 530 to 1 565
L-band Long wavelength 1 565 to 1 625
U-band Ultralong wavelength 1 625 to 1 675
Source: ITU-T G.Supplement 39.
5 Test report

Fully documented test reports and supporting evidence shall be prepared and be available for

inspections as evidence that the tests have been carried out and complied with.
6 Performance requirements
6.1 Sample size
Sample sizes for the tests are defined in Annex A.
6.2 Test details and requirements

A minimum length of fibre or cable of 2,0 m per port shall be prepared for all tests.

Test details and requirements for category C and C are shown in Table 2 and Table 3,

respectively. An example of test details and requirements including detailed measurements

conditions is shown in Annex C (informative).
---------------------- Page: 9 ----------------------
– 8 – IEC 61753-061-2:2020 © IEC 2020
Table 2 – Test details and requirements for category C
No Tests Requirements Details
1 Insertion loss ≤ 0,7 dB (single stage) Launch fibre length: ≥ 2,0 m
(attenuation)
≤ 0,8 dB (double stage) Insertion loss (attenuation) shall be
Condition:
IEC 61300-3-7
met over operating wavelength
range and all state of polarization
IEC 61300-3-2
(SOP).
Refer Table C.1,
Measurement ≤ 0,1 dB
No.1.
uncertainty:
2 Isolation ≥ 20 dB (single stage) Launch fibre length: ≥ 2,0 m
IEC 61300-3-7 ≥ 40 dB (double stage) Condition: Isolation shall be met over
operating wavelength range and all
IEC 61300-3-2
SOP.
Refer Table C.1,
Measurement ≤ 0,3 dB (single stage)
No.2.
uncertainty:
≤ 0,5 dB (double stage)
NOTE IEC 61300-3-7 is the test
method to measure the wavelength
dependence of attenuation.
However, it can apply to the
measurement of isolation, because
in the case of an isolator, isolation
is the wavelength dependent
attenuation measured in the
opposite direction to test no. 1.
3 Return loss ≥ 55 dB Launch fibre length: ≥ 2,0 m
IEC 61300-3-7 Return loss shall be met over
Condition:
operating wavelength range.
Refer Table C.1,
No.3.
Measurement ≤ 1 dB
uncertainty:
The port not under test shall be
optically terminated to avoid
unwanted reflections contributing to
the measurement.
4 Polarization ≤ 0,10 dB (single stage) Launch fibre length: ≥ 2,0 m
dependent
≤ 0,15 dB (double stage) Condition: PDL shall be met over operating
loss
wavelength range.
PDL
Measurement ≤ 0,02 dB
IEC 61300-3-2
uncertainty:
5 Polarization ≤ 0,20 ps (single stage) Launch fibre length: ≥ 2,0 m
mode dispersion
≤ 0,10 ps (double stage)
Measurement ≤ 0,05 ps
PMD uncertainty:
IEC 61300-3-32
---------------------- Page: 10 ----------------------
IEC 61753-061-2:2020 © IEC 2020 – 9 –
No Tests Requirements Details
6 High optical Before and after the test, the Test set-up and Annex B
power limits of insertion loss procedure:
(attenuation), isolation, return
IEC 61300-2-14 Optical power: 300 mW
loss and PDL of test no. 1, 2, 3
and 4 shall be met.
IEC 61300-3-3
SOP of the light Average SOP (depolarized)
source:
During the forward input test,
Refer Annex B.
the insertion loss (attenuation)
Wavelength: 1 550 nm for C-band
change is monitored. During
and after the test, the insertion
1 580 nm for L-band
loss change shall be within
NOTE A different wavelength is
±0,3 dB of the initial value.
acceptable when there is a
During the backward input test,
negotiation between customer and
the isolation change is
supplier.
monitored. The sum of the
Duration of the
30 min
initial value and the change of
optical power
the isolation shall be within the
exposure:
value defined at test no. 2.
Temperature: 60 °C ± 2 °C
During the forward input test,
the return loss change is
Relative humidity: +2
93 % RH
monitored. The sum of the
initial value and the change of
the return loss shall be within
NOTE This test condition focuses
the value defined at test no. 3.
to standard optical isolators.
The insertion loss
(attenuation), isolation and
return loss shall be measured
after launching an optical
power of 300 mW
simultaneously in both forward
and backward directions. After
the test, the insertion loss
change shall be within ±0,3 dB
of the initial value. After the
test, the sum of the initial value
and the change of the isolation
shall be within the value
defined at test no. 2. After the
test, the sum of the initial value
and the change of the return
loss shall be within the value
defined at test no. 3.
7 Cold Before and after the test, the Temperature: −10 °C ± 2 °C
limits of insertion loss
IEC 61300-2-17
Duration of 96 h
(attenuation), isolation, return
exposure:
loss and PDL of test no. 1, 2, 3
and 4 shall be met.
The insertion loss change after
the test shall be within ±0,3 dB
of the initial value.
8 Dry heat – High Before and after the test, the Temperature: +60 °C ± 2 °C
temperature limits of insertion loss
Duration of 96 h
endurance (attenuation), isolation, return
exposure:
loss and PDL of test no. 1, 2, 3
IEC 61300-2-18
and 4 shall be met.
The insertion loss (attenuation)
change after the test shall be
within ±0,3 dB of the initial
value.
9 Damp heat Before and after the test, the Temperature: +40°C ± 2 °C
(steady state) limits of insertion loss
Relative humidity: +2
93 % RH
(attenuation), isolation, return
IEC 61300-2-19
loss and PDL of test no. 1, 2, 3
and 4 shall be met.
Duration of
IEC 61300-3-3 96 h
exposure:
During and after the test, the
Refer Annex C
insertion loss (attenuation)
change shall be within ±0,3 dB
of the initial value.
---------------------- Page: 11 ----------------------
– 10 – IEC 61753-061-2:2020 © IEC 2020
No Tests Requirements Details
10 Change of Before and after the test, the High temperature: +60°C ± 2 °C
temperature limits of insertion loss
Low temperature: −10°C ± 2 °C
(attenuation), isolation, return
IEC 61300-2-22
loss and PDL of test no. 1, 2, 3
Number of cycles: Cycles 5
and 4 shall be met.
IEC 61300-3-3
Duration at extreme 60 min
During and after the test, the
Refer Annex C
temperature:
insertion loss (attenuation)
change shall be within ±0,3 dB
Rate of change: 1 °C /min
of the initial value.
The sum of the initial value and
the change of the isolation shall
be within the value defined at
test no. 2.
Before and after the test, the
11 Vibration Frequency range: 10 Hz to 55 Hz
limits of insertion loss
IEC 61300-2-1 Number of axes: 3 orthogonal axes
(attenuation), isolation, return
loss and PDL of test no. 1, 2, 3
IEC 61300-3-28
Number of sweeps: 15 /axis
and 4 shall be met.
Refer Annex C
Sweep rate: 1 octave/min
During and after the test, the
insertion loss (attenuation)
Amplitude: 0,75 mm
change shall be within ±0,3 dB
of the initial value.
12 Shock Before and after the test, the Acceleration: 5 000 m/s
limits of insertion loss
IEC 61300-2-9 Duration: 1 ms, half sine pulse
(attenuation) , isolation, return
loss and PDL of test no. 1, 2, 3
Number of axis: 3 axes in 2 directions
and 4 shall be met.
Number of shocks: 2 shocks per axis, 12 shocks
The insertion loss change after
in total
the test shall be within ±0,3 dB
of the initial value.

Flexing of the Before and after the test, the Tensile force: 2 N for reinforced cable

strain relief of limits of insertion loss
Number of cycles: 50 cycles
fibre optic (attenuation), isolation, return
devices loss and PDL of test no. 1, 2, 3 Angle: ±90°
IEC 61300-2-44 and 4 shall be met.
The insertion loss (attenuation)
change after the test shall be
within ±0,3 dB of the initial
value
Fibre/cable Before and after the test,
...

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