IEC 62150-3:2012

IEC 62150-3
®

Edition 1.0 2012-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside


Fibre optic active components and devices – Test and measurement
procedures –
Part 3: Optical power variation induced by mechanical disturbance in optical
receptacles and transceiver interfaces

Composants et dispositifs actifs à fibres optiques – Procédures d'essais et de
mesures –
Partie 3: Variation de puissance optique induite par des perturbations
mécaniques dans les interfaces d'embases optiques et d'émetteurs-récepteurs

IEC 62150-3:2012

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IEC 62150-3

®


Edition 1.0 2012-07




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE
colour

inside










Fibre optic active components and devices – Test and measurement

procedures –

Part 3: Optical power variation induced by mechanical disturbance in optical


receptacles and transceiver interfaces



Composants et dispositifs actifs à fibres optiques – Procédures d'essais et de


mesures –

Partie 3: Variation de puissance optique induite par des perturbations

mécaniques dans les interfaces d'embases optiques et d'émetteurs-récepteurs










INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE

PRICE CODE
INTERNATIONALE

CODE PRIX S


ICS 33.180.20 ISBN 978-2-83220-157-2



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

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– 2 – 62150-3 © IEC:2012
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references. 6
3 Terms, definitions and abbreviations . 6
3.1 Terms and definitions . 6
3.2 Abbreviations . 7
4 Measurement consideration . 7
4.1 Multiple test methods . 7
4.2 Two wiggle loss mechanisms . 7
4.2.1 Rationale for two different wiggle loss test methods. 7
4.2.2 Case A: Point of action for the ferrule . 8
4.2.3 Case B: Point of action for the plug housing . 8
5 Test method A . 8
5.1 Apparatus . 8
5.1.1 Apparatus . 8
5.1.2 Test cord . 8
5.1.3 Power meter . 8
5.1.4 Test load . 8
5.2 Test procedures for Tx interfaces . 9
5.2.1 Test procedures . 9
5.2.2 Set up . 9
5.2.3 Initial measurement . 9
5.2.4 Apply load and rotate . 9
5.2.5 Wiggle loss . 10
5.3 Test procedures for Rx interfaces and optical receptors . 10
5.3.1 Test procedures . 10
5.3.2 LOS indicator method . 10
5.3.3 Receiver optical power monitor method . 10
6 Test method B . 11
6.1 Apparatus . 11
6.1.1 Apparatus . 11
6.1.2 Test fixture and rotation mechanism . 11
6.1.3 Test cord . 11
6.1.4 Power meter . 11
6.1.5 Test load . 11
6.2 Test procedures for Tx interfaces . 11
6.2.1 Test procedures . 11
6.2.2 Set up . 12
6.2.3 Initial measurement . 12
6.2.4 Apply load . 12
6.2.5 Measurement . 12
6.2.6 Wiggle loss . 12
6.3 Test procedures for Rx interfaces and optical receptors . 13
6.3.1 Test procedures . 13
6.3.2 LOS indicator method . 13
6.3.3 Receiver optical power monitor method . 13

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62150-3 © IEC:2012 – 3 –
7 Test results . 14
Annex A (normative) Load requirements . 15
Annex B (normative) Summary of test conditions . 16
Annex C (normative) Characteristics of test cord . 17
Annex D (normative) Floating tolerance . 19
Bibliography . 20

Figure 1 – Equipment setup of Method A for Tx interfaces . 9
Figure 2 – Equipment setup of Method A for Rx interfaces and optical receptors . 10
Figure 3 – Equipment setup of Method B for Tx interfaces . 12
Figure 4 – Equipment setup of Method B for Rx interface and optical receptors. 13
Figure C.1 – Wiggle test cord interface . 17
Figure D.1 – Floating tolerance . 19

Table 1 – Multiple test methods . 7
Table A.1 – Method A: Loads applied for devices using small-form-factor connector
cords (1,25 mm ferrule) . 15
Table A.2 – Method B: Loads applied for devices using small-form-factor connector
cords (1,25 mm ferrule) . 15
Table B.1 – Summary of test conditions for Method A (normative) . 16
Table B.2 – Summary of test conditions for Method B (normative) . 16
Table C.1 – Wiggle test cord specification . 17
Table C.2 – Dimensions of the wiggle test cord interface . 18

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INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

FIBRE OPTIC ACTIVE COMPONENTS AND DEVICES –
TEST AND MEASUREMENT PROCEDURES –

Part 3: Optical power variation induced by mechanical disturbance
in optical receptacles and transceiver interfaces


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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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
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6) All users should ensure that they have the latest edition of this publication.
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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 62150-3 has been prepared by subcommittee 86C: Fibre optic
systems and active devices 86: Fibre optics.
The text of this standard is based on the following documents:
FDIS Report on voting
86C/1061/FDIS 86C/1072/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.

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62150-3 © IEC:2012 – 5 –
The committee has decided that the contents of this publication will remain unchanged until the
stability 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.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this document using a colour printer.

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– 6 – 62150-3 © IEC:2012
FIBRE OPTIC ACTIVE COMPONENTS AND DEVICES –
TEST AND MEASUREMENT PROCEDURES –

Part 3: Optical power variation induced by mechanical disturbance
in optical receptacles and transceiver interfaces



1 Scope
The purpose of this part of IEC 62150 is to specify the test requirements and procedures for
qualifying optical devices for sensitivity to coupled power variations induced by mechanical
disturbance at the optical ports of the device. It applies to active devices with optical receptacle
interfaces. In this edition, transceivers using small-form-factor connector cables (1,25 mm
ferrule) for single mode fibre are specified.
It has been found that some optical transceivers and receptacles are susceptible to fibre optic
cable induced stress when side forces are applied to the mated cable-connector assembly,
resulting in variations in the transmitted optical power. This part of IEC 62150 defines physical
stress tests to ensure that such optical connections (cable and receptacle) can continue to
function within specifications.
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 61753 (all parts), Fibre optic interconnecting devices and passive components
performance standard
IEC 61753-021-6, Fibre optic interconnecting devices and passive components performance
standard – Part 021-6: Grade B/2 single-mode fibre optic connectors for category O –
Uncontrolled environment
IEC 61754 (all parts), Fibre optic connector interfaces
3 Terms, definitions and abbreviations
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1.1
wiggle
mechanical disturbances that induce coupled optical power variation to the optical receptacle
and transceiver interface
3.1.2
wiggle loss
variation in coupled output power (with respect to a no-load, non-rotated measurement)
induced in an optical module or receptacle when the mated connector is laterally stressed.

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62150-3 © IEC:2012 – 7 –
3.2 Abbreviations
3.2.1
DUT
device under test
3.2.2
LOS
loss of signal
3.2.3
Rx
receiver
3.2.4
Tx
transmitter
4 Measurement consideration
4.1 Multiple test methods
Since the wiggle loss mechanisms are categorized into two different cases, Cases A and B,
this standard defines two measurement methods, Methods A and B, as shown in Table 1.
Methods A and B are applicable to the tests for the mechanical endurance of transceivers
under wiggle Cases A and B, respectively.
Table 1 – Multiple test methods
Test methods Applicable to Example of parameters to be included
Method A Wiggle Case A: test for optical transceivers used Test procedure, test fixture, test jumper,
with patchcord terminated to connectors which meet test load
interface standards (IEC 61754 series)
Method B Wiggle Case B: test for optical transceivers used Test procedure, test fixture, test jumper,
with patchcord terminated to connectors which meet test load
both interface standards (IEC 61754 series) and
performance standards (IEC 61753 series)

4.2 Two wiggle loss mechanisms
4.2.1 Rationale for two different wiggle loss test methods
Some optical transceivers and receptacles are susceptible to fibre optic cable induced stress
when forces are applied to the mated cable-connector assembly. Depending on the structure of
fibre-optic connectors, two different points of action for the receptacle cause two different types
of wiggle loss.
The intention of Method A is to help ensure that the transceiver port design is robust enough to
work with a variety of cables that meet interface standards available in the field. The intention
of Method B is to ensure port designs are robust enough to endure potential side loads during
operation and installation with cables of known performance.
To guarantee the mechanical robustness of optical transceivers under wiggle Case A and/or B,
transceiver suppliers and users can adopt both Methods A and B if necessary, or can choose
either Method A or B by the mutual agreement.

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4.2.2 Case A: Point of action for the ferrule
When the ferrule floating tolerance is insufficient (see Annex D), external side forces applied to
the patchcord can cause deformation of the sleeve of the receptacle by ferrule bending
moment. This causes variations in the transmitted optical power of transceivers. In this case,
the mechanical robustness of transceivers depends on the sleeve, receptacle port, and optical
sub-assembly design. There are also some patchcords which have insufficient ferrule floating
tolerance as this is not specified in interface standards.
4.2.3 Case B: Point of action for the plug housing
When the ferrule floating tolerance is sufficient, external forces applied to the patchcord
causes deformation of the receptacle housing by plug bending moment. This causes variations
in the transmitted optical power of transceivers. In this case, the mechanical endurance of
transceivers depends on the design of receptacle housings. Sufficient ferrule floating tolerance
can be guaranteed by performance standards of patchcords as specified in Annex C, Method B.
5 Test method A
5.1 Apparatus
5.1.1 Apparatus
An example of the test apparatus is shown in Figure 1. Details of the elements are given in the
following sections. Measurement wavelength is in accordance with the wavelength of
transceiver specifications, and the test data is obtained at room temperature.
The exact details of the test fixture will depend on the type of device under test. For example, if
an optical transceiver is being evaluated, a test board capable of securing and powering up the
transceiver may be used. In this case, it is centre mounted to the spindle of a rotation
mechanism so that it can be rotated symmetrically over 360°.
5.1.2 Test cord
In order to simulate the wiggle loss mechanism of Case A, specially designed test patchcords
called “simulated wiggle test cords” are used in Method A. Detail specifications of the
simulated wiggle test cord are defined in Annex C.
In Figure 1, the test cord is connected to the transceiver under test. The test jumper has a
weight applied to the end of test cord to stress the connection to the device-under-test (DUT).
The test cord is connected to a power meter at the other end to record the transmitted power
variations.
5.1.3 Power meter
The power meter is used to measure variations in the coupled power from the device under
test. It is set up to record the maximum peak-to-peak excursions in power level normalized
around the initial no load measurement. In the case of Test Method A, the following
measurement set-up is recommended. Both the rotation mechanism (e.g., stepper motor) and
power meter are interfaced to a computer for control and data logging purposes. Ideally, the
controller’s software can manipulate direction of rotation, speed and step increments of the
stepper motor. During the 360° continuous rotation, the instrumentation should be capable of
collecting data at least one data point for every 2,5 degrees of rotation, which equates to a
response time of better than 100 milliseconds for the measuring instrumentation.
5.1.4 Test load
The test load or weight should be applied in the end of the test cord. The test load is defined in
Annex A.

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62150-3 © IEC:2012 – 9 –
5.2 Test procedures for Tx interfaces
5.2.1 Test procedures
The test is conducted with a suitable fixture, as illustrated in Figure 1. This example utilizes an
optical transceiver (Tx) port or other “connectorized” optical source. The simulated wiggle test
cord (fibre cord and connector) is flexed at the point of entry to the connector on the DUT by
applying a load in the form of a weight to the fibre while rotating the test fixture. The test is
conducted as follows.

Stepper motor
Test fixture
Motor control
Load
DUTDUTDUT
DUT
–5,67 dBm
----------  5. 5.5.5. 5. 5. 5. 5. 5.5.67 dB67 dB67 dB67 d67 dB67 dB67 dB67 dB67 dB67 dBBmmmmmmmmmm
Load
Power meter
Test jumper IEC  1164/12

NOTE The details of the loading point are described in Annex C.
Figure 1 – Equipment setup of Method A for Tx interfaces
5.2.2 Set up
Mount the connector/optical assembly as shown in Figure 1 and connect the simulated wiggle
test cord from the device’s output port/Tx port to the power meter. If the DUT contains more
than one port (for example a Tx port and an Rx port in the case of a transceiver), only one port
should be analyzed at a time. Hence only a single simulated wiggle test cord should be
connected to the device at any given time.
5.2.3 Initial measurement
Without applying any load and without rotating the fixture, measure and record the output
power of the DUT when mounted in the fixture. The power meter should be reset at this point
so that all measurements are normalized around this output level.
5.2.4 Apply load and rotate
Next apply the appropriate load to the simulated wiggle test cord as shown in Figure 1.
The fixture / DUT to which the load is attached is to rotate both clockwise and anti-clockwise.
Allow for a settling time of 10 0073 after the load is attached or disturbed and before and after
each rotation.
With a 360° rotation at a speed of 4 rpm (or less), record the power meter readings after the
clockwise and anti-clockwise rotations have completed.

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5.2.5 Wiggle loss
The wiggle loss is defined as the maximum peak-to-peak delta of the measured power during
the loading process of 5.2.4 including initial measurement value of 5.2.3.
5.3 Test procedures for Rx interfaces and optical receptors
5.3.1 Test procedures
In the case of Rx interfaces or optical receptors (for example a transceiver Rx connector test or
where the DUT does not contain a light source), the DUT is mounted in a test fixture as shown
in Figure 2, with one of the following test methods applied.

Stepper motor
Test fixture
Motor control
Load
DUTDUTDUTDUT
–5,67 dBm
----------  5. 5.5.5. 5. 5. 5. 5. 5.5.67 dB67 dB67 dB67 dB67 dB67 dB67 dB67 dB67 dB67 dBmmmmmmmmmm
Load
Attenuator
Test jumper
Light source
IEC  1165/12

NOTE The details of the loading point are described in Annex C
Figure 2 – Equipment setup of Method A for Rx interfaces and optical receptors
5.3.2 LOS indicator method
a) Adjust the input power to the receptacle to find the LOS (Los
...