Bsi bs en 61300 3 42 2008

BRITISH STANDARD

Fibre optic
interconnecting
devices and passive
components — Basic
test and measurement
procedures —
Part 3-42: Examinations and
measurements — Attenuation of single
mode alignment sleeves and or adaptors
with resilient alignment sleeves

ICS 33.180.20

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BS EN
61300-3-42:2008


BS EN 61300-3-42:2008

National foreword
This British Standard is the UK implementation of EN 61300-3-42:2008. It is
identical to IEC 61300-3-42:2007.
The UK participation in its preparation was entrusted by Technical Committee
GEL/86, Fibre optics, to Subcommittee GEL/86/2, Fibre optic interconnecting
devices and passive components.
A list of organizations represented on this committee can be obtained on
request to its secretary.

This publication does not purport to include all the necessary provisions of a
contract. Users are responsible for its correct application.
Compliance with a British Standard cannot confer immunity from
legal obligations.

This British Standard was
published under the authority
of the Standards Policy and
Strategy Committee
on 29 August 2008

© BSI 2008

ISBN 978 0 580 54578 8

Amendments/corrigenda issued since publication
Date

Comments


EUROPEAN STANDARD

EN 61300-3-42

NORME EUROPÉENNE
May 2008

EUROPÄISCHE NORM
ICS 33.180.20

English version

Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 3-42: Examinations and measurements Attenuation of single mode alignment sleeves and or adaptors
with resilient alignment sleeves
(IEC 61300-3-42:2007)
Dispositifs d'interconnexion
et composants passifs à fibres optiques Procédures fondamentales d'essais
et de mesures Partie 3-42: Examens et mesures Affaiblissement apporté par les manchons
d'alignement et/ou les raccords équipés
de manchons d'alignement élastiques
unimodaux
(CEI 61300-3-42:2007)

Lichtwellenleiter Verbindungselemente
und passive Bauteile Grundlegende Prüf- und Messverfahren Teil 3-42: Untersuchungen
und Messungen Dämpfung von Einmoden-Zentrierhülsen
und/oder Adaptern mit gefederten
Zentrierhülsen
(IEC 61300-3-42:2007)

This European Standard was approved by CENELEC on 2008-03-01. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the

Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2008 CENELEC -

All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61300-3-42:2008 E


BS EN 61300-3-42:2008

–2–

Foreword
The text of document 86B/2600/FDIS, future edition 1 of IEC 61300-2-42, 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 was approved by CENELEC as EN 61300-2-42 on 2008-03-01.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement

(dop)

2008-12-01

– latest date by which the national standards conflicting
with the EN have to be withdrawn

(dow)

2011-03-01

Annex ZA has been added by CENELEC.
__________

Endorsement notice
The text of the International Standard IEC 61300-2-42:2007 was approved by CENELEC as a European
Standard without any modification.
__________


–3–

BS EN 61300-3-42:2008

CONTENTS
1

Scope ...............................................................................................................................4

2

Normative references .......................................................................................................4

3

General description ..........................................................................................................4

4

3.1 Attenuation ..............................................................................................................4
3.2 Precautions in measuring attenuation ......................................................................5
Apparatus .........................................................................................................................5

5

4.1 Launch conditions and source (S) ...........................................................................5
4.2 Power meter (D) ......................................................................................................5
4.3 Reference plugs (RP) ..............................................................................................6
4.4 Reference adaptors (Ar) ..........................................................................................6
4.5 Mode filter (mf) ........................................................................................................6
Procedure ........................................................................................................................6

6

5.1 Pre-conditioning ......................................................................................................6
5.2 Visual inspection .....................................................................................................7
5.3 Attenuation measurement........................................................................................7
5.4 Procedure for measuring 8-position adaptor attenuation: ......................................... 7
Details to be specified ......................................................................................................8

Annex A (informative) Example results sheet ......................................................................... 9

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Annex ZA (normative) Normative references to international publications with their
corresponding European publications....................................................................................................11

Bibliography.......................................................................................................................... 10
Figure 1 – Measurement of P 0 ................................................................................................7
Figure 2 – Measurement of P 1 ................................................................................................7
Figure A.1 – Example of results sheet..................................................................................... 9
Table 1 – Preferred source and launch conditions...................................................................5
Table 2 – Preferred power-meter parameters ..........................................................................6


BS EN 61300-3-42:2008

–4–

FIBRE OPTIC INTERCONNECTING DEVICES
AND PASSIVE COMPONENTS –
BASIC TEST AND MEASUREMENT PROCEDURES –
Part 3-42: Examinations and measurements –
Attenuation of single mode alignment sleeves
and or adaptors with resilient alignment sleeves

1

Scope

This part of IEC 61300 describes the method to measure the attenuation of single mode
adaptors with resilient sleeves and the attenuation of resilient sleeves.

2

Normative references

The following referenced documents are indispensable for the application 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 61300-1:2003 Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 1: General and guidance

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IEC 61300-3-1, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 3-1: Examinations and measurements – Visual examination
IEC 61300-3-35 PAS, Fibre optic interconnecting devices and passive components – Basic
test and measurement procedures – Part 3-35: Examinations and measurements – Fibre optic
cylindrical connector endface visual inspection
IEC 61754 (all parts), Fibre optic connector interfaces
IEC 61755-3 (all parts) Fiber optic connector optical interfaces – Part 3: Optical interface

3
3.1

General description
Attenuation

Attenuation is intended to give a value for the decrease of useful power, expressed in
decibels, resulting from the insertion of a device under test (DUT), within a length of optical
fibre cable.

The DUT may have more than two optical ports (multiple adaptors). However, since an
attenuation measurement is made across only two ports, the DUT's in this standard shall be
described as having two ports.
The reference method for measuring attenuation is with an optical power meter. The
measured attenuation is a result of the lateral offset between the fibre cores of the used
connectors and the interaction between sleeve geometry and ferrule outer diameter.


BS EN 61300-3-42:2008

–5–

3.2

Precautions in measuring attenuation

The following test precautions shall be taken.
The power in the fibre shall not be at a level high enough to generate non-linear scattering
effects. A recommended level is less than 0 dBm.
The position of the fibres in the test should be fixed between the measurement of P 0 and P 1
to avoid changes in attenuation due to bending loss.
The relative rotation of the 2 plugs during the test shall be less than 5°

4
4.1

Apparatus
Launch conditions and source (S)

Unless otherwise specified, the launch condition shall be in accordance with Annex B of

IEC 61300-1.
The source unit consists of an optical emitter, the associated drive electronics and fibre pigtail
(if any). The preferred source and launch conditions are given in Table 1 below.
Table 1 – Preferred source and launch conditions
Number

S4

Type

Single-mode

Centre
wavelength

Spectral
width

Stability
at 23 o C

nm

nm

1 310 ± 30

≤120

Source

type

dB/h

Launch
conditions
(Annex B,
IEC 61300-1)

±0,05

B.2.2

LED

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NOTE For this measurement method an LED is chosen to avoid influences of polarisation sensitivity of the
measurement set up.

4.2

Power meter (D)

The power-meter unit consists of an optical detector, the mechanism for connecting to it and
associated detection electronics. The connection to the detector will be with an adaptor that
accepts a connector plug of the appropriate design.
The measurement system shall be stable within specified limits over the period of time
required to measure P 0 and P 1 .
For measurements where the connection to the detector must be broken between the

measurement of P 0 and P 1 , the measurement repeatability shall be within 0,02 dB. A detector
with a large sensitive area may be used to achieve this.The precise characteristics of the
detector shall be compatible with the measurement requirements. The dynamic range of the
power meter shall be capable of measuring the power level exiting from the DUT at the
wavelength being measured.
The preferred power-meter parameters are given below in Table 2.


BS EN 61300-3-42:2008

–6–

Table 2 – Preferred power-meter parameters
Number

Type

Linearity
dB

Accuracy

D2

Single-mode

≤±0,02

≤±5 %

(from –30 dBm
to –40 dBm)

NOTE 1 In order to ensure that all light exiting the fibre is detected by the power meter, the sensitive area of the
detector and the relative position between it and the fibre should be compatible with the numerical aperture of the
fibre.
NOTE 2

4.3

The power-meter stability should be ≤0,02 dB over the measurement time

Reference plugs (RP)

Reference plugs are required to form complete connector assemblies in all of the test
methods, the reference plugs become in effect a part of the DUT during the measurement of
attenuation. Reference plugs shall be as specified in this clause.
The maximum attenuation between two reference plugs shall be ≤ 0,03 dB when measured in
8 positions, in a reference adaptor. The reference plugs shall be of the same interface family
from the IEC 61754 series. Endface geometry as specified in the IEC 61755-3 series for
cylindrical ferrules (Part 3 – optical interface) shall be met. Care should be taken to ensure
that influence on the measured attenuation is only a result of the lateral offset between the
fibre cores. Additional attenuation caused by mode field diameter mismatch and angular
misalignment shall be avoided by ensuring that the reference plugs are terminated on the
cable sourced from the same cable sample, using plugs with angular misalignment < 0,2°.
The OD (outer diameter) of the ferrule of the reference plugs shall be in agreement with the
IEC 61755-3 series for cylindrical ferrules. For 2,5 mm ferrules the OD shall be minimum
2,498 5mm and maximum 2,499 5 mm. For 1,25 mm ferrules the OD shall be minimum 1,248
5mm and maximum 1,249 5 mm.

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4.4

Reference adaptors (Ar)

Reference adaptors are required to test the reference connectors. Reference adaptors are
adaptors of superior performance selected from the population of normal adaptors by the
process in 5.4. Reference adapters will give lower loss than average when used with
reference connectors.
Reference adaptors shall meet all dimensional requirements as stated in the relevant
connector interface standard of the IEC 61754 series.
4.5

Mode filter (mf)

For single-mode measurements the mode filter shall include at least two metres of fibre with
two loops of 50 mm diameter placed in the cord attached to the source.

5
5.1

Procedure
Pre-conditioning

The optical interfaces of the DUT shall be clean and free from any debris likely to affect the
performance of the test and any resultant measurements. Clean dry air shall be used to
remove free particles from mating surfaces on the inside of the adaptor and outside of the
connector housing. The inside of the sleeve shall be cleaned according to the manufacturer’s
instructions.

BS EN 61300-3-42:2008

–7–

The DUT shall be allowed to stabilize at room temperature for at least 1 h prior to testing.
NOTE Care should be exercised throughout the test to ensure that mating surfaces are not contaminated with oil
or grease. It is recognized that bare fingers can deposit a film of grease.

5.2

Visual inspection

The optical interfaces shall be free from defects or damage which may affect the performance
of the test and any resultant measurements. It is recommended that a visual inspection of the
optical interfaces of the DUT is made in accordance with IEC 61300-3-1 prior to the start of
the test. The end faces of the reference plugs shall be examined according to IEC 61300-3-35
PAS. Clean dry air shall be used to remove free particles from mating surfaces on the inside
of the adaptor and outside of the connector housing. The inside of the sleeve shall be cleaned
according the manufacturers instructions.
5.3

Attenuation measurement

Two measurements of power are required for each measurement of attenuation, A, with a
power meter where P 1 is the measurement of power with the DUT in the circuit and P 0 is the
measurement of power without the DUT in the circuit.
P 0 is measured with the test patch cord connected between the detector and the lead from the
temporary joint with the reference plug (RP) (see Figure 1).

TJ
S

RP
D

P0

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mf

Figure 1 – Measurement of P 0
The DUT and another reference plug are added, to measure P 1 (see Figure 2).

RP

TJ
S

RP
D

mf

P1

DUT

Figure 2 – Measurement of P 1

The attenuation is then calculated:

5.4

A = −10 log

P1
dB
P0

Procedure for measuring 8-position adaptor attenuation:

The measurement over 8 positions is according to the 3, 6, 9 and 12 o’clock position of the
alignment sleeve. The tolerance on these positions is +/- 10 degrees. A cleaning stick might
be used to place the slit of the alignment sleeve in the required position. After the first four
measurements the adaptor is reversed and the sleeve is placed again in the positions 3,6,9
and 12 o’clock. In each position both reference plugs are inserted and the measured
attenuation is recorded. For each adaptor a total of 8 measurements are taken.
All results should be recorded. Annex A provides an example.


BS EN 61300-3-42:2008

–8–

After the first four measurements, both ferrule end faces are inspected for damage that
degrade the performance of these reference plugs. When the end faces meet
requirements of the relevant document (default document is IEC 61300-3-35 PAS) the
adaptor might be measured. If they do not meet the end face requirements replace them

new reference plugs.

6

Details to be specified

−

Type of adaptor interface

−

Reference plug endface angle 0° or angled with 8° or 9°

−

Number of samples to be tested

−

Deviations from this procedure

may
the
next
with

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BS EN 61300-3-42:2008

–9–

Annex A
(informative)
Example results sheet
The results are to be recorded related to sample number and position of the slit in the
alignment sleeve.
In this way certain manufacturing deviations in the manufacturing of sleeve and or adaptor
might be found.

Side A

12
3
6
9
12
3
6
9
Minimum
Maximum
Average
Range
Side B

Result of measurements

Example results sheet:

0,02
0,03
0,02
0,02
0,01
0,02
0,04
0,04
0,01
0,04
0,03
0,03

0,03
0,02
0,01
0,02
0,03
0,03
0,02
0,03
0,01
0,03
0,02
0,02

0,01
0,02

0,02
0,03
0,02
0,03
0,00
0,01
0,00
0,03
0,02
0,03

0,01
0,02
0,02
0,03
0,02
0,03
0,02
0,03
0,01
0,03
0,02
0,02

0,04
0,03
0,02
0,02
0,03
0,12

0,08
0,03
0,02
0,12
0,05
0,10

0,11
0,07
0,03
0,06
0,05
0,02
0,02
0,07
0,02
0,11
0,05
0,09

0,04
0,02
0,01
0,05
0,03
0,02
0,03
0,03
0,01
0,05

0,03
0,04

0,02
0,03
0,02
0,05
0,02
0,01
0,02
0,05
0,01
0,05
0,03
0,04

0,01
0,03
0,03
0,05
0,02
0,03
0,02
0,03
0,01
0,05
0,03
0,04

0,03

0,02
0,02
0,03
0,02
0,02
0,03
0,05
0,02
0,05
0,03
0,03

0,02
0,02
0,03
0,03
0,04
0,04
0,03
0,02
0,02
0,04
0,03
0,02

ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ

Figure A.1 – Example of results sheet

BS EN 61300-3-42:2008

– 10 –

Bibliography
IEC 61300-3-4: Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 3-4: Examinations and measurements – Attenuation
NOTE Harmonized as EN 61300-3-4:2001 (not modified).

IEC 61755-2-1: Fibre optic connector optical interfaces – Optical interface standard single
mode non-angled physically contacting fibres
NOTE Harmonized as EN 61755-2-1:2006 (not modified).

IEC 61755-2-2: Fibre optic connector optical interfaces – Part 2-2: Optical interface standard
single mode angled physically contacting fibres
NOTE Harmonized as EN 61755-2-2:2006 (not modified).

___________

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– 11 –

BS EN 61300-3-42:2008

Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following referenced documents are indispensable for the application 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.
NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.

Publication

Year

Title

EN/HD

Year

IEC 61300-1

2003

Fibre optic interconnecting devices and
passive components - Basic test and
measurement procedures Part 1: General and guidance

EN 61300-1

2003

IEC 61300-3-1

-

1)

Fibre optic interconnecting devices and
passive components - Basic test and
measurement procedures Part 3-1: Examinations and measurements Visual examination

EN 61300-3-1

2005

IEC/PAS 61300-3-35

-

1)

Fibre optic interconnecting devices and
passive components - Basic test and
measurement procedures Part 3-35: Examinations and measurements Fibre optic cylindrical connector endface
visual inspection

IEC 61754 (mod)

Series Fibre optic connector interfaces

2)

Undated reference.

Valid edition at date of issue.

-

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IEC 61755-3 (mod) Series Fibre optic connector optical interfaces Part 3: Optical interface

1)

2)

EN 61754

Series

EN 61755-3

Series


BS EN
61300-3-42:2008

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