EN 61315:2006

SLOVENSKI SIST EN 61315:2006
STANDARD
julij 2006
Umerjanje optovlakenskih števcev električne energije (IEC 61315:2005)
Calibration of fibre-optic power meters (IEC 61315:2005)
ICS 33.140; 33.180.01 Referenčna številka
©  Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

EUROPEAN STANDARD
EN 61315
NORME EUROPÉENNE
January 2006
EUROPÄISCHE NORM
ICS 33.140;33.180.10 Supersedes EN 61315:1997

English version
Calibration of fibre-optic power meters
(IEC 61315:2005)
Etalonnage de wattmètres pour dispositifs Kalibrierung von Lichtwellenleiter-
à fibres optiques Leistungsmessern
(CEI 61315:2005) (IEC 61315:2005)

This European Standard was approved by CENELEC on 2005-11-01. 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, Cyprus, Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland
and 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

© 2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61315:2006 E
Foreword
The text of document 86/239/FDIS, future edition 2 of IEC 61315, prepared by IEC TC 86, Fibre
optics, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as
EN 61315 on 2005-11-01.
This European Standard supersedes EN 61315:1997.
Changes from EN 61315:1997 consist of adapting the uncertainty calculations to the approach taken
by the GUM, and adapting the terminology and graphical symbology to international standards VIM,
IEC 61931 and IEC 61930.
The importance of the nonlinearity calibration is emphasized by giving more detail and is now in a
separate clause.
Requirements concerning organization and traceability have been taken out of this standard since
they are general requirements concerning calibration laboratories and are given in EN ISO/IEC 17025.
The goal to standardize the type of power meter specifications has been removed since it does not
belong in a standard on calibration. Specifications should, however, still be based on calibrations
made following this standard and EN 60359.
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) 2006-08-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2008-11-01
__________
Endorsement notice
The text of the International Standard IEC 61315:2005 was approved by CENELEC as a European
Standard without any modification.
__________
NORME CEI
INTERNATIONALE
IEC
INTERNATIONAL
Deuxième édition
STANDARD
Second edition
2005-10
Etalonnage de wattmètres
pour dispositifs à fibres optiques

Calibration of fibre-optic
power meters
 IEC 2005 Droits de reproduction réservés  Copyright - all rights reserved
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61315  IEC:2005 – 3 –
CONTENTS
FOREWORD.5
INTRODUCTION.9

1 Scope.11
2 Normative references.11
3 Terms and definitions .13
4 Preparation for calibration.27
4.1 Organization .27
4.2 Traceability.27
4.3 Advice for measurements and calibrations .29
4.4 Recommendations to customers .31
5 Absolute power calibration .31
5.1 Establishing the calibration conditions.33
5.2 Calibration procedure .35
5.3 Calibration uncertainty .37
5.4 Reporting the results .51
6 Measurement uncertainty of a calibrated power meter .51
6.1 Uncertainty at reference conditions .51
6.2 Uncertainty at operating conditions .53
7 Nonlinearity calibration.67
7.1 Nonlinearity calibration based on superposition .69
7.2 Nonlinearity calibration based on comparison with a calibrated power meter.73
7.3 Nonlinearity calibration based on comparison with an attenuator .75
7.4 Calibration of power meter for high power measurement .75

Annex A (normative) Mathematical basis .79

Bibliography .85

Figure 1 – Typical spectral responsivity of photoelectric detectors.23
Figure 2 – Example of a traceability chain.27
Figure 3 – Measurement setup for sequential, fibre-based calibration .33
Figure 4 – Change of conditions and uncertainty.43
Figure 5 – Determining and recording an extension uncertainty.55
Figure 6 – Possible subdivision of the optical reference plane into 10 x 10 squares, for
the measurement of the spatial response .57
Figure 7 − Wavelength dependence of response due to Fabry-Perot type interference .65
Figure 8 – Measurement setup of polarization dependent response .65
Figure 9 – Nonlinearity calibration based on superposition .69
Figure 10 – Measurement setup for nonlinearity calibration by comparison.73

Table 1 – Typical calibration methods and correspondent power .31
Table 2 – Nonlinearity .71

61315  IEC:2005 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
CALIBRATION OF FIBRE-OPTIC
POWER METERS
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
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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
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between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
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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 61315 has been prepared by IEC technical committee 86: Fibre
optics.
This second edition cancels and replaces the first edition published in 1995. It constitutes a
technical revision.
Changes from the previous edition of this International Standard consist of adapting the
uncertainty calculations to the approach taken by the GUM, and adapting the terminology and
graphical symbology to international standards VIM, IEC 61931 and IEC 61930.
The importance of the nonlinearity calibration is emphasized by giving more detail and is now in
a separate clause.
61315  IEC:2005 – 7 –
Requirements concerning organization and traceability have been taken out of this standard
since they are general requirements concerning calibration laboratories and are given in
IEC/ISO 17025.
The goal to standardize the type of power meter specifications has been removed since it does
not belong in a standard on calibration. Specifications should, however, still be based on
calibrations made following this standard and IEC 60359.
The text of this standard is based on the following documents:
FDIS Report on voting
86/239/FDIS 86/248/RVD
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
maintenance result date indicated on the IEC web site 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.
61315  IEC:2005 – 9 –
INTRODUCTION
Fibre-optic power meters are designed to measure optical power from fibre-optic sources as
accurately as possible. Thi
...