oSIST prEN IEC 61300-3-3:2024

SLOVENSKI STANDARD
oSIST prEN IEC 61300-3-3:2023
01-september-2023
Povezovalne naprave in pasivne komponente optičnih vlaken - Postopki
osnovnega preskušanja in merjenja - 3-3. del: Preiskovanje in meritve - Aktivno
nadzorovanje sprememb pri zmanjševanju in povračilu izgube
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
Lichtwellenleiter - Verbindungselemente und passive Bauteile - Grundlegende Prüf- und
Messverfahren - Teil 3-3: Untersuchungen und Messungen - Aufzeichnung der
Änderung von Dämpfung und Rückflussdämpfung
Dispositifs d'interconnexion et composants passifs à fibres optiques - Méthodes
fondamentales d'essais et de mesures - Partie 3-3: Examens et mesures - Contrôle actif
des variations de l'affaiblissement et de l'affaiblissement de réflexion
Ta slovenski standard je istoveten z: prEN IEC 61300-3-3:2023
ICS:
33.180.20 Povezovalne naprave za Fibre optic interconnecting
optična vlakna devices
oSIST prEN IEC 61300-3-3:2023 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN IEC 61300-3-3:2023
oSIST prEN IEC 61300-3-3:2023
86B/4759/CDV
COMMITTEE DRAFT FOR VOTE (CDV)

PROJECT NUMBER:
IEC 61300-3-3 ED4
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2023-06-23 2023-09-15
SUPERSEDES DOCUMENTS:
86B/4619/CD, 86B/4655A/CC
IEC SC 86B : FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE COMPONENTS
SECRETARIAT: SECRETARY:
Japan Mr Shigeru Tomita
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:

Other TC/SCs are requested to indicate their interest, if
any, in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of
which they are aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some
Countries” clauses to be included should this proposal proceed. Recipients are reminded that the CDV stage is
the final stage for submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).

TITLE:
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
PROPOSED STABILITY DATE: 2029
NOTE FROM TC/SC OFFICERS:
download this electronic file, to make a copy and to print out the content for the sole purpose of preparing National
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oSIST prEN IEC 61300-3-3:2023
IEC CDV 61300-3-3/Ed4  IEC:2023 – 2 – 86B/4759/CDV
1 CONTENTS
3 FOREWORD . 4
4 1 Scope . 6
5 2 Normative references . 6
6 3 Terms, definitions and abbreviations . 6
7 3.1 Terms and definitions. 6
8 3.2 Abbreviations . 7
9 4 General description . 7
10 4.1 Measurement method . 7
11 4.2 Precautions. 7
12 5 Apparatus . 8
13 5.1 Methods 1, 2 and 3 . 8
14 5.1.1 General . 8
15 5.1.2 Launch conditions (E) and source (S) . 8
16 5.1.3 Monitoring equipment . 9
17 5.1.4 Detector (D) . 9
18 5.1.5 Stress fixture . 10
19 5.1.6 Branching device (BD) . 10
20 5.1.7 Temporary joints (TJ) . 10
21 5.1.8 Mode filters (single mode) and mode conditioners (multimode) (E) . 10
22 5.1.9 Data acquisition . 11
23 5.1.10 Monitor sample . 11
24 5.1.11 Reference fibre . 11
25 5.2 Methods 4 and 5 . 12
26 5.2.1 General . 12
27 5.2.2 OTDR . 13
28 5.2.3 Fibre launch sections . 13
29 5.2.4 Mode filters . 13
30 5.2.5 Optical switches . 13
31 6 Procedure . 15
32 6.1 Monitoring attenuation and return loss of a single sample – method 1 . 15
33 6.1.1 General . 15
34 6.1.2 Attenuation monitoring – method 1 . 15
35 6.1.3 Return loss monitoring – method 1 . 15
36 6.2 Monitoring attenuation and return loss of multiple samples using a 1 × N
37 branching device – method 2 . 15
38 6.2.1 General . 15
39 6.2.2 Attenuation monitoring – method 2 . 15
40 6.2.3 Return loss monitoring – method 2 . 16
41 6.3 Monitoring attenuation and return loss of multiple samples using two 1 × N
42 optical switches – method 3 . 16
43 6.3.1 General . 16
44 6.3.2 Attenuation – method 3 . 16
45 6.3.3 Return loss – method 3 . 17
46 6.4 Bidirectional OTDR monitoring of attenuation and return loss of multiple
47 samples – method 4 . 18

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48 6.4.1 General . 18
49 6.4.2 Attenuation – method 4 . 18
50 6.4.3 Return loss – method 4 . 20
51 6.5 Unidirectional OTDR monitoring of attenuation and return loss of multiple
52 samples – method 5 . 21
53 7 Details to be specified and reported . 21
54 7.1 Method 1 . 21
55 7.2 Methods 2 and 3 . 22
56 7.3 Methods 4 and 5 . 22
57 Bibligraphy. 23
59 Figure 1 – Method 1 – Monitoring attenuation and return loss of a single sample
60 undergoing stress testing . 11
61 Figure 2 – Method 2 – Monitoring attenuation and return loss of multiple samples
62 using a 1 × N branching device . 12
63 Figure 3 – Method 3 – Monitoring attenuation and return loss of multiple samples
64 using two 1 × N optical switches . 12
65 Figure 4 – Method 4 – Bidirectional OTDR monitoring of attenuation
66 and return loss of multiple samples . 14
67 Figure 5 – Method 5 – Unidirectional OTDR monitoring of attenuation and return loss
68 of multiple samples . 15
69 Figure 6 – Cut-back measurement location (transmission) . 17
70 Figure 7 – Typical OTDR trace caused by the reflection from a DUT . 19
71 Figure 8 – Cut-back measurement location (OTDR) . 20
73 Table 1 – Preferred source conditions . 8
74 Table 2 – Preferred power meter parameters . 10
75 Table 3 – Example values for Rayleigh backscatter coefficient. 21
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78 INTERNATIONAL ELECTROTECHNICAL COMMISSION
79 ____________
81 FIBRE OPTIC INTERCONNECTING DEVICES
82 AND PASSIVE COMPONENTS –
83 BASIC TEST AND MEASUREMENT PROCEDURES –
85 Part 3-3: Examinations and measurements –
86 Active monitoring of changes in attenuation and return loss
FOREWORD
89 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
90 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
91 co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
92 in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
93 Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
94 preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
95 may participate in this preparatory work. International, governmental and non-governmental organizations liaising
96 with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
97 Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
98 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
99 consensus of opinion on the relevant subjects since each technical committee has representation from all
100 interested IEC National Committees.
101 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
102 Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
103 Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
104 misinterpretation by any end user.
105 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
106 transparently to the maximum extent possible in their national and regional publications. Any divergence between
107 any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
108 5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment
109 declared to be in conformity with an IEC Publication.
110 6) All users should ensure that they have the latest edition of this publication.
111 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
112 members of its technical committees and IEC National Committees for any personal injury, property damage or
113 other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
114 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
115 Publications.
116 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
117 indispensable for the correct application of this publication.
118 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
119 rights. IEC shall not be held responsible for identifying any or all such patent rights.
120 International Standard IEC 61300-3-3 has been prepared by subcommittee 86B: Fibre optic
121 interconnecting devices and passive components, of IEC technical committee 86: Fibre optics.
122 This fourth edition cancels and replaces the third edition published in 2009. This edition
123 constitutes a minor revision.
124 The changes with respect to the previous edition include harmonization with IEC 61300-3-4 and
125 61300-3-6 by revision of the requirements for the:
126 a) light source
127 b) launching condition
128 c) detector
129 d) temporary joint
130 e) as well as revision of normative references.
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132 The text of this standard is based on the following documents:
FDIS Report on voting
86B/xxxxFDIS 86B/xxxxRVD
134 Full information on the voting for the approval of this standard can be found in the report on
135 voting indicated in the above table.
136 The French version of this standard has not been voted upon.
137 This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
138 A list of all parts of IEC 61300 series, published under the general title Fibre optic
139 interconnecting devices and passive components – Basic test and measurement procedures,,
140 can be found on the IEC website.
141 The committee has decided that the contents of this publication will remain unchanged until the
142 maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in the data
143 related to the specific publication. At this date, the publication will be
144 • reconfirmed,
145 • withdrawn,
146 • replaced by a revised edition, or
147 • amended.
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150 FIBRE OPTIC INTERCONNECTING DEVICES
151 AND PASSIVE COMPONENTS –
152 BASIC TEST AND MEASUREMENT PROCEDURES –
154 Part 3-3: Examinations and measurements –
155 Active monitoring of changes in attenuation and return loss
159 1 Scope
160 This part of IEC 61300 describes the procedure to monitor changes in attenuation and/or return
161 loss of a component, an interconnecting device, a fibre management system, or a protective
162 housing, when subjected to an environmental or mechanical test. Such a procedure is
163 commonly referred to as active monitoring. The procedure to monitor temporary changes
164 (generally faster) during disruptive events is given in IEC 61300-3-28.
165 The procedure can be applied to measurements on single samples or to simultaneous
166 measurements on multiple samples, both at single wavelengths and multiple wavelengths, by
167 using branching devices and/or switches as appropriate.
168 2 Normative references
169 The following referenced documents are indispensable for the application of this document. For
170 dated references, only the edition cited applies. For undated references, the latest edition of
171 the referenced document (including any amendments) applies.
172 IEC 61300-1, Fibre optic interconnecting devices and passive components – Basic test and
173 measurement procedures – Part 1: General and guidance
174 IEC 61300-3-1, Fibre optic interconnecting devices and passive components – Basic test and
175 measurement procedures – Part 3-1: Examinations and measurements – Visual examination
176 IEC 61300-3-2, Fibre optic interconnecting devices and passive components – Basic test and
177 measurement procedures – Part 3-2: Examinations and measurements – Polarization
178 dependent loss in a single-mode fibre optic device
179 IEC 61300-3-28, Fibre optic interconnecting devices and passive components – Basic test and
180 measurement procedures – Part 3-6: Examinations and measurements – Transient loss
181 IEC 61300-3-35, Fibre optic interconnecting devices and passive components – Basic test and
182 measurement procedures – Part 3-35: Examinations and measurements – Visual inspection of
183 fibre optic connectorsl and fibre-stub transceivers
184 3 Terms, definitions and abbreviations
185 3.1 Terms and definitions
186 For the purposes of this document, the terms and definitions are given in IEC 60050-731 and
187 IEC 61300-1.
188 ISO and IEC maintain terminological databases for use in standardization at the following
189 addresses:
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190 • IEC Electropedia: available at http://www.electropedia.org/
191 • ISO Online browsing platform: available at http://www.iso.org/obp.
192 3.2 Abbreviations
193 BD branching device
194 DUT device under test
195 LED light emitting diode
196 OTDR optical time domain reflectometer
197 PDL polarization dependent loss
198 TJ temporary joint
199 WDM wavelength-division multiplexing
200 4 General description
201 4.1 Measurement method
202 The procedure describes a number of active monitoring measurement methods. Method 1
203 describes the situation where a single sample is subject to mechanical or environmental stress
204 testing. Methods 2 and 3 describe methods for monitoring changes in the optical performance
205 of multiple samples. Methods 4 and 5 measure changes in the optical performance of samples
206 using an OTDR. Methods 4 and 5 may be used only when the OTDR averaging time is much
207 less than the variation time of the test conditions. Where there is any form of uncertainty over
208 the measurement method used, method 1 shall be the reference method.
209 All methods are capable of being configured to monitor changes in attenuation and return loss
210 at the same time. The required optical test parameters shall be defined in the relevant
211 specification.
212 Where a group of samples is being monitored over a period of time, say several days or weeks,
213 it is usual to employ some form of automated data acquisition. Also, since the changes in optical
214 performance can be very small, it is important to ensure high measurement stability over time.
215 4.2 Precautions
216 The following requirements shall be met.
217 a) Precautions shall be taken to ensure that cladding modes do not affect the measurement as
218 advised in IEC 61300-1.
219 b) Precautions shall be taken to prevent movement in the position of the fibres between the
220 sample(s) and the test apparatus, to avoid changes in optical performance caused by
221 bending losses.
222 c) The stability performance of the test equipment shall be ≤ 0,05 dB or 10 % of the attenuation
223 to be measured, whichever is the lower value. The stability shall be maintained over the
224 measurement time. The required measurement resolution for attenuation shall be 0,01 dB
225 for both multimode and single-mode.
226 d) To achieve consistent results, clean and inspect all samples prior to measurement
227 in accordance with the manufacturer’s instructions. Visual examination shall be undertaken
228 in accordance with IEC 61300-3-1 and IEC 61300-3-35.

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229 e) The power in the fibre shall be at a level that does not generate non-linear scattering effects
230 (typically < 3 mW).
231 f) It is common to be monitoring changes in optical performance that are small in comparison
232 with the polarization dependence of the components under test (DUT) and of parts of the
233 test apparatus such as branching devices, switches and detectors. Since polarization along
234 the fibres often changes over time, either an unpolarized or polarization scrambled source
235 can be used to measure the polarization averaged attenuation, or the methods of
236 IEC 61300-3-2 should be used to measure polarization dependent loss (PDL) and
237 attenuation together.
238 g) Particularly, when measuring wavelength dependent components such as WDM devices, it
239 is necessary to use a light source that does not emit light at extraneous wavelengths at
240 levels that can affect the measurement uncertainty.
241 h) Reflected powers from the test apparatus shall be at a level that does not affect the
242 measurement uncertainty.
243 i) Care shall be taken when using switches or branching devices for multimode measurements.
244 In many cases, these devices will modify the launched mode power distribution or result in
245 modal detection non-uniformity, which will give rise to additional measurement uncertainty.
246 5 Apparatus
247 5.1 Methods 1, 2 and 3
248 5.1.1 General
249 The apparatus used for methods 1, 2 and 3 of this procedure is shown in Figures 1, 2 and 3.
250 The apparatus consists of elements listed in clauses 5.1.2 to 5.1.11.
251 5.1.2 Launch conditions (E) and source (S)
252 The launch conditions for light sources shall be in accordance with IEC 61300-1 and shall be
253 measured at the output of the launch reference connector. For multimode fibre sources, a mode-
254 conditioning device may be required to satisfy these conditions, as illustrated with device E in
255 Figure 1 and the launch reference connector where the launch conditions are verified is at the
256 temporary joint into the DUT.
257 The source unit consists of an optical emitter, the associated drive electronics and fibre pigtail
258 (if any). Preferred source conditions are given in Table 1. The stability of the single-mode fibre
259 source at 23 °C shall be ± 0,01 dB over the duration of the measurement. The stability of the
260 multimode fibre source at 23°C shall be ± 0,05 dB over the duration of the measurement. The
261 source output power shall be ≥ 20 dB above the minimum measurable power level.
262 There are a number of methods of performing measurements at multiple wavelengths. One
263 method, illustrated in Figure 3, shows independent light sources joined by optical Switch 3.
264 Table 1 – Preferred source conditions
No. Type Central wavelength Spectral width Source type
nm nm
S1 Multimode 660 ± 30 ≥10 Monochromator or LED
S2 Multimode Monochromator or LED
780 ± 30 ≥10
S3 Multimode Monochromator or LED
850 ± 30 ≥10
S4 Multimode 1 300 ± 30 ≥10 Monochromator or LED
S5 Single-mode 1 310 ± 30 To be reported Laser diode, monochromator or LED
S6 Single-mode To be reported Laser diode, monochromator or LED
1 550 ± 30
S7 Single-mode 1 625 ± 30 To be reported Laser diode, monochromator or LED

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NOTE 1 It is recognized that some components, e.g. for CWDM, can require the use of other source types such
as tunable lasers. In these cases, the preferred source characteristics are specified on the basis of the component
to be measured.
NOTE 2 Central wavelength and spectral width are defined in IEC 61280-1-3.
NOTE 3 The interference of modes from a coherent source will create speckle patterns in multimode fibre. These
speckle patterns give rise to speckle or modal noise and are observed as power fluctuations, since their
characteristic times are longer than the resolution time of the detector. As a result, it can be impossible to achieve
stable launch conditions using coherent sources for multimode measurements. Consequently, lasers are avoided
in favour of LEDs or other incoherent sources for measuring multimode components.
266 5.1.3 Monitoring equipment
267 Where multiple sample measurements are made, suitable apparatus is required to permit
268 monitoring of the light through the multiple paths.
269 In Figure 2, individual monitoring channels are established by dividing the light into N paths
270 using a 1 × N branching device (BD). This method is practical for a small number of DUTs, since
271 it requires a multiplicity of branching devices and detectors.
272 In Figure 3, active switching of the light paths through the DUTs is used. The apparatus consists
273 of a directional branching device and two 1 × N computer-controlled optical switches. The
274 channel number of these switches is sufficiently large to accommodate the DUTs under test,
275 one or more reference lines, and a reference reflectance channel.
276 The design of systems to test multiple samples requires the trade-off of a number of factors
277 s
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