SIST EN 61300-3-2:2002
(Main)Fibre optic interconnecting devices and passive components - Basic tests and measurement procedures -- Part 3-2: Examinations and measurements - Polarization dependence of attenuation in a single-mode fibre optic device
Fibre optic interconnecting devices and passive components - Basic tests and measurement procedures -- Part 3-2: Examinations and measurements - Polarization dependence of attenuation in a single-mode fibre optic device
Determines the dependence of attenuation in single-mode fibre optic devices to changes in polarization. This procedure can be applied to any branching devices, attenuators, isolators and switches.Determines the dependence of attenuation in single-mode fibre optic devices to changes in polarization. This procedure can be applied to any single-mode interconnecting device and passive component, including connectors, splices, branching devices, attenuators, isolators and switches.
Lichtwellenleiter - Verbindungselemente und passive Bauteile - Grundlegende Prüf- und Meßverfahren -- Teil 3-2: Untersuchungen und Messungen - Polarisationsabhängigkeit von Einmoden-Lichtwellenleiter-Bauteilen
Dispositifs d'interconnexion et composants passifs à fibres optiques - Méthodes fondamentales d'essais et de mesures -- Partie 3-2: Examens et mesures - Dépendance à la polarisation de l'affaiblissement dans un dispositif pour fibres optiques monomodes
Détermine la dépendance de l'affaiblissement des dispositifs pour fibres optiques monomodes aux variations de polarisation. Cette procédure peut être appliquée à n'importe quel dispositif d'interconnexion et composant passif monomode, y compris les connecteurs, les épissures, les dispositifs de couplage, les atténuateurs, les isolateurs et les commutateurs.
Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 3-2: Examinations and measurements - Polarization dependence of attenuation in single-mode fibre optic device (IEC 61300-3-2:1999)
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Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 61300-3-2:2002
01-september-2002
1DGRPHãþD
SIST EN 61300-3-2:1999
Fibre optic interconnecting devices and passive components - Basic test and
measurement procedures - Part 3-2: Examinations and measurements -
Polarization dependence of attenuation in single-mode fibre optic device (IEC
61300-3-2:1999)
Fibre optic interconnecting devices and passive components - Basic tests and
measurement procedures -- Part 3-2: Examinations and measurements - Polarization
dependence of attenuation in a single-mode fibre optic device
Lichtwellenleiter - Verbindungselemente und passive Bauteile - Grundlegende Prüf- und
Meßverfahren -- Teil 3-2: Untersuchungen und Messungen - Polarisationsabhängigkeit
von Einmoden-Lichtwellenleiter-Bauteilen
Dispositifs d'interconnexion et composants passifs à fibres optiques - Méthodes
fondamentales d'essais et de mesures -- Partie 3-2: Examens et mesures - Dépendance
à la polarisation de l'affaiblissement dans un dispositif pour fibres optiques monomodes
Ta slovenski standard je istoveten z: EN 61300-3-2:1999
ICS:
33.180.20 3RYH]RYDOQHQDSUDYH]D Fibre optic interconnecting
RSWLþQDYODNQD devices
SIST EN 61300-3-2:2002 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 61300-3-2:2002
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SIST EN 61300-3-2:2002
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SIST EN 61300-3-2:2002
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SIST EN 61300-3-2:2002
NORME CEI
INTERNATIONALE IEC
61300-3-2
INTERNATIONAL
Deuxième édition
STANDARD
Second edition
1999-06
Dispositifs d'interconnexion et composants
passifs à fibres optiques –
Méthodes fondamentales d'essais et
de mesures –
Partie 3-2:
Examens et mesures –
Dépendance à la polarisation
de l'affaiblissement dans un dispositif
pour fibres optiques monomodes
Fibre optic interconnecting devices
and passive components –
Basic test and measurement procedures –
Part 3-2:
Examinations and measurements –
Polarization dependence of attenuation
in a single-mode fibre optic device
IEC 1999 Droits de reproduction réservés Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in
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électronique ou mécanique, y compris la photo-copie et les including photocopying and microfilm, without permission in
microfilms, sans l'accord écrit de l'éditeur. writing from the publisher.
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Telefax: +41 22 919 0300 e-mail: inmail@iec.ch IEC web site http://www.iec.ch
CODE PRIX
Commission Electrotechnique Internationale
Q
PRICE CODE
International Electrotechnical Commission
Pour prix, voir catalogue en vigueur
For price, see current catalogue
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SIST EN 61300-3-2:2002
61300-3-2 © IEC:1999 – 3 –
CONTENTS
Page
FOREWORD . 5
Clause
1 General. 9
1.1 Scope and object . 9
1.2 General description . 9
2 Apparatus .11
3 Procedure .19
3.1 Precautions. 19
3.2 Reference options . 19
3.3 Method A – All states of polarization. 25
3.4 Method B – Linear polarization only . 25
5 Details to be specified . 27
Annex A (informative) In-line, all-fibre polarization adjuster . 29
Figure 1 – Examples of method A launch apparatus . 13
Figure 2 – Examples of method B launch apparatus . 17
Figure 3 – Measurement steps for cutback fibre. 21
Figure 4 – Measurement steps for substitute fibre . 23
Figure 5 – Ratio measurement. 23
Figure A.1 – Equivalent scheme of a fibre optic polarization adjuster realized by a cascade
of three retardation discrete elements . 31
Figure A.2 – Example of polarization effect obtained by a fibre polarization adjuster . 31
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SIST EN 61300-3-2:2002
61300-3-2 © IEC:1999 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
–––––––––––––
FIBRE OPTIC INTERCONNECTING DEVICES
AND PASSIVE COMPONENTS –
BASIC TEST AND MEASUREMENT PROCEDURES –
Part 3-2: Examinations and measurements –
Polarization dependence of attenuation in a single-mode fibre optic device
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes International Standards. 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. The 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 the 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 National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical reports or guides and they are accepted by the National Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61300-3-2 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 1995, and constitutes a
technical revision.
The text of this standard is based on the following documents:
FDIS Report on voting
86B/1197/FDIS 86B/1231/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 3.
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SIST EN 61300-3-2:2002
61300-3-2 © IEC:1999 – 7 –
IEC 61300 consists of the following parts, under the general title: Fibre optic interconnecting
devices and passive components – Basic test and measurement procedures:
– Part 1: General and guidance
– Part 2: Tests
– Part 3: Examinations and measurements
Annex A is for information only.
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SIST EN 61300-3-2:2002
61300-3-2 © IEC:1999 – 9 –
FIBRE OPTIC INTERCONNECTING DEVICES
AND PASSIVE COMPONENTS –
BASIC TEST AND MEASUREMENT PROCEDURES –
Part 3-2: Examinations and measurements –
Polarization dependence of attenuation in a single-mode fibre optic device
1 General
1.1 Scope and object
The object of this part of IEC 61300 is to determine the dependence of attenuation in single-
mode fibre optic devices to changes in polarization. This procedure can be applied to any
single-mode interconnecting device and passive component, including connectors, splices,
branching devices, attenuators, isolators and switches. It is used to measure the total range of
attenuation, Δa, due to changes in polarization of the launch state. For branching devices, it
can also be used to measure the total range of coupling ratio, ΔCR(i). It cannot be used to
measure the polarization dependence of return loss.
1.2 General description
Two methods for measuring polarization dependence of attenuation are described. Method A
determines the maximum polarization sensitivity over all possible polarization states including
linear, circular and elliptical. Method B determines the maximum polarization sensitivity over all
linearly polarized launch states. Method A is preferred, particularly for any device in which the
generic polarization state of light passing through the device is changed. Method B generally
understates the polarization sensitivity of devices which are not dependent on linearly polarized
light. Therefore, it is not recommended for tests where the device under test (DUT) has not
been characterized as being sensitive to purely linear polarized light.
Two options are allowed for making the measurement:
a) cutback or substitution fibre;
b) ratio measurement.
Option a) shall be used to arbitrate disagreements in the options. Option b) is the most
convenient one for typical apparatus using method A.
1.2.1 Method A
Light is launched into the input port of the DUT such that linear, circular, and elliptical states of
polarization with different axes of orientation can be adjusted while the power from the output
port is monitored. The input power is also monitored by tapping some of the power through a
polarization-independent branching device.
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SIST EN 61300-3-2:2002
61300-3-2 © IEC:1999 – 11 –
By adjusting for maximum and minimum power through the component, the polarization
sensitivity of the attenuation can be obtained. For branching devices, this method can also be
used to measure the total range of coupling ratio.
1.2.2 Method B
Linearly polarized light is injected into the launch end of the DUT. The launch lead of the
device shall be deployed in a straight line without any external stresses, for example bends,
twists, kinks or tension. This is necessary because the state of polarization carried in the fibre
is altered by external stresses.
The return leads may be deployed with bends as long as they are large enough not to induce
bend loss (e.g. bend diameters greater than 90 mm). If the state of polarization is altered by a
bend in the output optical path, the polarization-dependent loss should not be altered since
there are no polarization-sensitive components in the output optical path.
The linear state of polarization of the launch is typically rotated through a minimum of 180°
while the power from the output of the device under test is measured. If the launch power
varies as a function of the launched state of linear polarization, this variation may be
referenced out.
The power from the source may be measured through an equivalent 180° cycle using a cutback
length from the input of the device under test or using an equivalent length of fibre similar to
the device under test in substitution as long as equivalence to the cutback measurement can
be demonstrated.
2 Apparatus
The following apparatus and equipment are required to perform this test.
a) Optical source S
An optical source capable of producing the spectral characteristics defined in the relevant
specifications (both wavelength and spectral width) shall be used. Unless specified in the
relevant specifications, the spectral width shall be less than 10 nm.
The source power shall be capable of meeting the dynamic range requirements of the
measurement when combined with the detector sensitivity.
The power, polarization state and wavelength stability of the source shall be sufficient to
achieve the specified measurement accuracy over the course of the measurement. An example
of such a source is a tungsten bulb combined with a spectrally filtering monochromator. For
some applications, a narrow linewidth source, such as a single longitudinal mode laser, may be
used.
NOTE – Multimode lasers may not provide sufficient polarization stability required for this measurement.
b) Excitation unit E
This unit consists of a passive optical system which transmits the optical power to the
component. Means shall be provided to ensure that the DUT is single-moded at the wavelength
of the measurement. A bend in the output pigtail of the DUT may be used to filter any second-
order mode power.
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SIST EN 61300-3-2:2002
61300-3-2 © IEC:1999 – 13 –
c) Temporary joint TJ
This is a method, device, or mechanical fixture for temporarily aligning two fibre ends into a
reproducible l
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