IEC 63032:2018

Fibre optic interconnecting devices and passive components - Fibre optic tuneable bandpass filters - Generic specification

IEC 63032:2018 applies to the family of tuneable bandpass filters. These components can modify the spectral intensity distribution in order to select some wavelengths and inhibit others.
They can be categorized into the following:
- wavelength tuneable;
- bandwidth tuneable;
- wavelength and bandwidth tuneable filter.
This document establishes uniform requirements for optical, mechanical and environmental properties.
Key words: tuneable bandpass filters

Dispositifs d'interconnexion et composants passifs fibroniques - Filtres fibroniques passe-bande accordables - Spécification générique

IEC 63032:2018 s'applique à la famille des filtres passe-bande accordables. Ces composants peuvent modifier la distribution de l'intensité spectrale afin de sélectionner certaines longueurs d'onde et d'en bloquer d'autres.
Ils peuvent être classés dans les catégories suivantes:
- filtre accordable en longueur d'onde;
- filtre accordable en largeur de bande;
- filtre accordable en longueur d'onde et en largeur de bande.
Le présent document établit des exigences uniformes relatives aux propriétés optiques, mécaniques et environnementales.
Mots clés : filtres passe-bande accordables

General Information

• Status: Published
• Publication Date: 23-May-2018
• ICS: 33.180.20 - Fibre optic interconnecting devices
• Technical Committee: SC 86B - Fibre optic interconnecting devices and passive components
• Drafting Committee: WG 7 - TC 86/SC 86B/WG 7
• Current Stage: PPUB - Publication issued
• Start Date: 24-May-2018
• Completion Date: 15-Jun-2018

Overview

IEC 63032:2018 is an international standard developed by the International Electrotechnical Commission (IEC) focusing on fibre optic tuneable bandpass filters. These passive optical components are designed to selectively modify the spectral intensity distribution in fibre optic systems by allowing certain wavelengths to pass through while inhibiting others. The standard defines generic specifications applicable to the family of tuneable bandpass filters, including wavelength tuneable, bandwidth tuneable, and combined wavelength and bandwidth tuneable filters.

This standard establishes uniform requirements covering optical, mechanical, and environmental properties to ensure consistent quality and performance across applications. IEC 63032:2018 serves as a critical reference for manufacturers, engineers, and designers in optical communication and photonics industries, promoting interoperability and reliability.

Key Topics

• Tuneable Bandpass Filters Classification

  • Wavelength tuneable filters: Adjust the specific wavelengths allowed to pass.
  • Bandwidth tuneable filters: Modify the width of the passband.
  • Combined wavelength and bandwidth tuneable filters: Provide dynamic control over both wavelength and bandwidth.

• Optical Performance Requirements

  • Specifications for insertion loss, wavelength accuracy, and bandwidth stability.
  • Tuning capabilities and spectral response characterization.

• Mechanical and Environmental Criteria

  • Material selection guidelines.
  • Mechanical design and workmanship standards.
  • Environmental robustness including temperature ranges, humidity, and mechanical shocks.

• Documentation and Marking

  • Clear guidelines on drawings, symbols, test reports, and usage instructions.
  • Proper identification and packaging methods to ensure traceability and quality control.

• Safety and Reliability Standards

  • Compliance with laser safety regulations and fire hazard testing.
  • Quality assurance procedures to enhance product lifecycles.

Applications

IEC 63032:2018 tuneable bandpass filters are fundamental components in modern fibre optic communication and sensing systems. Their ability to select and filter wavelengths dynamically enables a variety of practical uses:

• Optical Networking

  • Dynamic channel selection in Dense Wavelength Division Multiplexing (DWDM) systems.
  • Channel equalization and noise reduction for enhanced signal integrity.

• Sensing and Measurement

  • Precise wavelength control for fibre optic sensors.
  • Spectral filtering in instrumentation and test systems.

• Telecommunications Infrastructure

  • Adaptive filtering in optical add-drop multiplexers for flexible network architectures.
  • Bandwidth management in high-speed data transmission systems.

• Research and Development

  • Prototyping new optical devices requiring tunable spectral filtering.
  • Experimental setups requiring variable wavelength selection.

Related Standards

IEC 63032:2018 complements and interlinks with several IEC standards to cover broader aspects of fibre optic technology and safety:

• IEC 61300 Series: Fibre optic interconnecting devices - Basic test and measurement procedures.
• IEC 61977: Fibre optic filters - Generic specification.
• IEC 60825-1: Safety of laser products – Equipment classification and requirements.
• IEC 60617: Graphical symbols for electrical and optical diagrams.
• IEC TR 61930: Fibre optic graphical symbology for consistent documentation.
• IEC 60695-11-5: Fire hazard testing including needle-flame test method.

By aligning with these standards, IEC 63032:2018 ensures comprehensive coverage for design, safety, and interoperability in fibre optic bandpass filtering components.

---

Keywords: fibre optic tuneable bandpass filters, wavelength tuneable filters, bandwidth tuneable filters, fibre optic components, optical networking standards, IEC 63032:2018, passive optical components, optical performance, fibre optic interconnecting devices, optical filtering technology.

Standards Content (Sample)

IEC 63032 ®
Edition 1.0 2018-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Fibre optic interconnecting devices and passive components – Fibre optic
tuneable bandpass filters – Generic specification

Dispositifs d'interconnexion et composants passifs fibroniques – Filtres
fibroniques passe-bande accordables – Spécification générique

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IEC 63032 ®
Edition 1.0 2018-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Fibre optic interconnecting devices and passive components – Fibre optic

tuneable bandpass filters – Generic specification

Dispositifs d'interconnexion et composants passifs fibroniques – Filtres

fibroniques passe-bande accordables – Spécification générique

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.20 ISBN 978-2-8322-5748-7

– 2 – IEC 63032:2018 © IEC 2018
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Requirements . 11
4.1 Classification . 11
4.1.1 General . 11
4.1.2 Type . 11
4.1.3 Style . 11
4.2 Documentation . 12
4.2.1 Symbols . 12
4.2.2 Drawings . 12
4.2.3 Test and measurements . 13
4.2.4 Test report . 13
4.2.5 Instructions for use . 13
4.3 Standardisation system . 13
4.3.1 Performance standard . 13
4.3.2 Reliability standard . 14
4.3.3 Interlinking . 14
4.4 Design and construction . 15
4.4.1 Materials . 15
4.4.2 Workmanship . 15
4.5 Performance requirements . 16
4.6 Identification and marking . 16
4.6.1 General . 16
4.6.2 Component marking . 16
4.6.3 Package marking . 16
4.7 Packaging . 16
4.8 Storage conditions . 16
4.9 Safety . 17
Annex A (informative) General information of tuneable bandpass filters . 18
Annex B (informative) Examples of tuneable bandpass filter technologies . 19
B.1 Tuneable filter using thermo-optic effects . 19
B.2 Tuneable filter using acousto-optic effects . 20
B.3 Tuneable filter using mechanical effects . 20
B.4 Tuneable filter using piezoelectric effects . 21
Bibliography . 23

Figure 1 – Illustration of wavelength tuneable bandpass filter . 7
Figure 2 – Illustration of bandwidth tuneable bandpass filter . 8
Figure 3 – Illustration of wavelength and bandwidth tuneable bandpass filter . 8
Figure 4 – Illustration of insertion loss deviation of tuning . 9
Figure 5 – Illustration of X dB bandwidth deviation of wavelength tuning . 10
Figure 6 – Tuneable bandpass filter style configurations . 12
Figure B.1 – Thermally tuneable thin film filter . 19

Figure B.2 – Thermally tuneable waveguide Bragg grating . 19
Figure B.3 – Thermally tuneable fibre Bragg grating . 19
Figure B.4 – Acousto-optic tuneable bandpass filter . 20
Figure B.5 – Tuneable filter by changing the incident angle . 20
Figure B.6 – Tuneable filter by sliding the incident position . 21
Figure B.7 – MEMS tuneable filter . 21
Figure B.8 – Tuneable bandpass filter by gap control using piezoelectric effect . 22

Table 1 – IEC specification structure . 11
Table 2 – Standards interlink matrix . 15
Table 3 – Quality assurance options . 15

– 4 – IEC 63032:2018 © IEC 2018
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE
COMPONENTS – FIBRE OPTIC TUNEABLE BANDPASS
FILTERS – GENERIC SPECIFICATION

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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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 63032 has been prepared by subcommittee SC 86B: Fibre optic
interconnecting devices and passive components, of IEC technical committee TC 86: Fibre
optics.
The text of this International Standard is based on the following documents:
FDIS Report on voting
86B/4125/FDIS 86B/4129/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document 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.
– 6 – IEC 63032:2018 © IEC 2018
FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE
COMPONENTS – FIBRE OPTIC TUNEABLE BANDPASS
FILTERS – GENERIC SPECIFICATION

1 Scope
This document applies to the family of tuneable bandpass filters. These components can
modify the spectral intensity distribution in order to select some wavelengths and inhibit
others.
They can be categorized into the following:
– wavelength tuneable;
– bandwidth tuneable;
– wavelength and bandwidth tuneable filter.
This document establishes uniform requirements for optical, mechanical and environmental
properties.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their
content constitutes requirements 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 60027 (all parts), Letter symbols to be used in electrical technology
IEC 60617, Graphical symbols for diagrams (available at http://std.iec.ch/iec60617)
IEC 60695-11-5, Fire hazard testing – Part 11-5: Test flames – Needle-flame test method –
Apparatus, confirmatory test arrangement and quidance
IEC 60825-1, Safety of laser products – Part 1: Equipment classification and requirements
IEC 61300 (all parts), Fibre optic interconnecting devices and passive components – Basic
test and measurement procedures
IEC TR 61930, Fibre optic graphical symbology
IEC 61977, Fibre optic interconnecting devices and passive components – Fibre optic filters –
Generic specification
IEC TS 62627-09, Fibre optic interconnecting devices and passive components – Vocabulary
for passive optical devices
ISO 129, Technical drawings – Dimensioning – General principles, definitions, methods of
execution and special indications
ISO 286-1, Geometrical product specifications (GPS) – ISO code system for tolerances on
linear sizes – Part 1: Bases of tolerances, deviations and fits

ISO 1101, Geometrical product specifications (GPS) – Geometrical tolerancing – Tolerancing
of form, orientation, location and run-out
ISO 8601, Data elements and interchange formats – Information interchange –
Representation of dates and times
3 Terms and definitions
For the purposes of this document, the terms and definitions in IEC 61977, IEC TS 62627-09
and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
wavelength tuneable bandpass filter
fibre optic filter in which the passband can be shifted without changing the spectral shape
Note 1 to entry: See Figure 1.
Wavelength tuning
Insertion
loss (dB)
Wavelength
IEC
NOTE Insertion loss is equivalent to attenuation.
Figure 1 – Illustration of wavelength tuneable bandpass filter
3.2
bandwidth tuneable bandpass filter
fibre optic filter in which the passband width can be changed without shifting the centre of the
passband
Note 1 to entry: See Figure 2.

– 8 – IEC 63032:2018 © IEC 2018
Bandwidth tuning
Insertion
loss (dB)
Wavelength
IEC
NOTE Insertion loss is equivalent to attenuation.
Figure 2 – Illustration of bandwidth tuneable bandpass filter
3.3
wavelength and bandwidth tuneable bandpass filter
fibre optic filter in which both the centre of the passband and the passband width can be
changed
Note 1 to entry: See Figure 3.
Wavelength and bandwidth tuning
Insertion
loss (dB)
Wavelength
IEC
NOTE Insertion loss is equivalent to attenuation.
Figure 3 – Illustration of wavelength and bandwidth tuneable bandpass filter
3.4
bandwidth tuneable range
spectral interval either in frequency or wavelength over which the passband bandwidth of a
tuneable optic filter can be adjusted by means of tuning control
Note 1 to entry: This term is applied for (a) bandwidth tuneable bandpass filters and (b) wavelength and
bandwidth tuneable bandpass filters.
3.5
wavelength tuneable range
spectral interval either in frequency or wavelength over which the operating wavelength or
frequency of a tuneable optic filter can be adjusted by means of tuning control
Note 1 to entry: This term is applied for (a) wavelength tuneable bandpass filters and (b) wavelength and
bandwidth tuneable bandpass filters.

3.6
bandwidth tuning resolution
minimum adjustable step size of the passband bandwidth
Note 1 to entry: This term is applied for (a) bandwidth tuneable bandpass filters and (b) wavelength and
bandwidth tuneable bandpass filters.
3.7
wavelength tuning resolution
minimum adjustable step size of the centre wavelength
Note 1 to entry: This term is applied for (a) wavelength tuneable bandpass filters and (b) wavelength and
bandwidth tuneable bandpass filters.
3.8
repeatability of bandwidth tuning
maximum deviation of the passband bandwidth after multiple times of repeated tuning
Note 1 to entry: This term is applied for (a) bandwidth tuneable bandpass filters and (b) wavelength and
bandwidth tuneable bandpass filters.
Note 2 to entry: The number of repeated times of tuning will be defined in the performance standard.
3.9
repeatability of wavelength tuning
maximum deviation of the wavelength after multiple times of repeated tuning
Note 1 to entry: This term is applied for (a) wavelength tuneable bandpass filters and (b) wavelength and
bandwidth tuneable bandpass filters.
Note 2 to entry: The number of repeated times of tuning will be defined in the performance standard.
3.10
insertion loss deviation of wavelength tuning
maximum attenuation (insertion loss) variation of a tuneable optic filter between wavelength
channels after multiple times of repeated tuning
Note 1 to entry: This term is applied for (a) wavelength tuneable bandpass filters and (b) wavelength and
bandwidth tuneable bandpass filters.
Note 2 to entry: The number of repeated times of tuning will be defined in the performance standard.
Note 3 to entry: See Figure 4.
Insertion loss deviation
0 of tuning
Insertion
loss (dB)
Passband Passband
Wavelength
IEC
NOTE Insertion loss is equivalent to attenuation.
Figure 4 – Illustration of insertion loss deviation of tuning

– 10 – IEC 63032:2018 © IEC 2018
3.11
X dB bandwidth deviation of wavelength tuning
maximum variation of a bandwidth of the tuneable optic filter after multiple times of repeated
tuning
Note 1 to entry: This term is applied for (a) wavelength tuneable bandpass filters and (b) wavelength and
bandwidth tuneable bandpass filters.
Note 2 to entry: The number of repeated times of tuning will be defined in the performance standard.
Note 3 to entry: See Figure 5.
X dB bandwidth deviation of tuning
X dB bandwidth (2)
X dB bandwidth (1)
X dB
X dB
Insertion
loss (dB)
X dB bandwidth (1) X dB bandwidth (2)
Wavelength
IEC
NOTE Insertion loss is equivalent to attenuation.
Figure 5 – Illustration of X dB bandwidth deviation of wavelength tuning
3.12
polarization dependent loss deviation of wavelength tuning
PDL deviation of wavelength tuning
maximum variation of polarization dependent loss for several wavelength channels after
multiple times of repeated tuning
Note 1 to entry: This term is applied for (a) wavelength tuneable bandpass filters and (b) wavelength and
bandwidth tuneable bandpass filters.
Note 2 to entry: The number of repeated times of tuning will be defined in the performance standard.
Note 3 to entry: This note applies to the French language only.
3.13
channel isolation deviation of wavelength tuning
maximum variation in channel isolation for several wavelength channels after multiple times of
repeated tuning
Note 1 to entry: This term is applied for (a) wavelength tuneable bandpass filters and (b) wavelength and
bandwidth tuneable bandpass filters.
Note 2 to entry: The number of repeated times of tuning will be defined in the performance standard.
3.14
wavelength channel tuning time
time taken for the tuneable optic filter to move from the initial wavelength channel to the
target wavelength channel
Note 1 to entry: This term is applied for (a) wavelength tuneable bandpass filters and (b) wavelength and
bandwidth tuneable bandpass filters.

3.15
bandwidth tuning time
time taken to adjust the bandwidth of the tuneable optic filter
Note 1 to entry: This term is applied for (a) bandwidth tuneable bandpass filters and (b) wavelength and
bandwidth tuneable bandpass filters.
4 Requirements
4.1 Classification
4.1.1 General
Fibre optic tuneable bandpass filters are classified either totally or in part by the following
categories:
– type;
– style.
An example of a typical tuneable bandpass filter classification is shown in Table 1.
Table 1 – IEC specification structure
Type Style
Wavelength tuneable – Configuration C
– LC connector
4.1.2 Type
The tuneable bandpass filter type shall be defined by its intended function and optical
performance. There are several types of filters, for instance:
– wavelength tuneable;
– bandwidth tuneable.
4.1.3 Style
The tuneable bandpass filter style shall be defined on the basis of the following elements:
– the input and output port configuration;
– the connector set type(s), if any.

– 12 – IEC 63032:2018 © IEC 2018
The five different input and output configurations can be scheduled as shown in Figures 6 a)
to 6 e).
Filter
Pigtail
IEC
a) Configuration A – Device containing fibre optic pigtails without connector plug
Filter
Connector plug
IEC
b) Configuration B – Device containing integral fibres, with a connector plug on each fibre
Filter
IEC
c) Configuration C – Device containing fibre optic connectors as a part of the device housing
Filter
IEC
d) Configuration D – Device containing one fibre optic connector as a part of the device housing
Filter
IEC
e) Configuration E – Device with the interfacing features of the ray of light
Figure 6 – Tuneable bandpass filter style configurations
4.2 Documentation
4.2.1 Symbols
Graphical and letter symbols shall, whenever possible, be taken from IEC 60027 (all parts),
IEC 60617 (all parts) and IEC TR 61930 unless superseded by this document.
4.2.2 Drawings
4.2.2.1 General
The drawings and dimensions given in the relevant specifications shall not restrict detail
construction nor be used as manufacturing drawings.

4.2.2.2 Dimensional system
All dimensions shall be given in accordance with ISO 129, ISO 286-1 and ISO 1101. The
metric system shall be used in all specifications. Dimensions shall not contain more than five
significant digits. When units are converted, a note shall be added in each relevant
specification.
4.2.3 Test and measurements
4.2.3.1 Test and measurement procedures
The test and measurement procedures for optical, mechanical, climatic and environmental
characteristics of filters to be used shall be defined and selected preferentially from
IEC 61300 (all parts). The size measurement method to be used shall be specified in the
relevant specification for dimensions which are specified within a total tolerance zone of
0,01 mm or less.
4.2.3.2 Reference components
Reference components for measurement purposes, if required, shall be specified in the
relevant specification.
4.2.4 Test report
The test report shall be prepared for each test conducted as required by a relevant
specification. The data sheets shall be included in the qualification report and in the periodic
inspection report.
Data sheets shall contain the following information as a minimum:
– title and date of test;
– specimen description including the variant identification number (see 4.6.2);
– test equipment used;
– all applicable test details;
– all measurement values and observations.
4.2.5 Instructions for use
Instructions for use, when required, shall be given by the manufacturer and shall include the
following:
– assembly and connection instructions;
– cleaning method;
– safety aspects;
– additional information, as necessary.
4.3 Standardisation system
4.3.1 Performance standard
Performance standards contain a series of tests and measurements (which may or may not be
grouped into a specified schedule depending on the requirements of those standards) with
clearly defined conditions, severities and pass/fail criteria. The tests are intended to be run on
a "one-off" basis to prove the ability of any products to satisfy the performance standards
requirement. Each performance standard has a different set of tests, and/or severities (and/or
groupings) representing the requirements of a market sector, user group or system location.

– 14 – IEC 63032:2018 © IEC 2018
A product that has been shown to meet all the requirements of a performance standard can
be declared as complying with a performance standard but should then be controlled by a
quality assurance/quality conformance programme.
4.3.2 Reliability standard
Reliability standards are intended to ensure that a component can meet performance
specifications under stated conditions for a stated time period. Reliability testing, on the other
hand, is applied to ensure that the component meets performance specifications for at least a
specified minimum useful lifetime or specified maximum failure rate. These tests are usually
done by utilising the performance testing, but increasing its duration and severity, in order to
accelerate the failure mechanisms.
For each type of component, the following shall be identified:
– failure modes (observable general mechanical or optical effects of failure);
– failure mechanisms (general causes of failure, common to several components), and
failure effects (detailed causes of failure, specific to component).
These are all related to environmental and material aspects.
There is an initial "infant mortality phase" just after component manufacturing, during which
many components would fail if they were deployed in the field. To avoid early field failure, all
components may be subjected to a screening process in the factory, involving environmental
stresses that may be mechanical, thermal and humidity related. This is to induce known
failure mechanisms in a controlled environmental situation to occur earlier than would
normally be seen in the unscreened population. For those components that survive (and are
then sold), there is a reduced failure rate since these mechanisms have been eliminated.
Screening is an optional part of the manufacturing process, rather than a test method. It will
not affect the "useful life" of a component defined as the period during which it performs
according to specifications. Eventually, other failure mechanisms appear, and the failure rate
increases beyond some defined threshold. At this point, the useful life ends and the "wear-out
region" begins, and the component shall be replaced.
At the beginning of useful life, performance testing on a sampled population of components
may be applied by the supplier, by the manufacturer, or by a third party. This is to ensure that
the component meets performance specifications over the range of intended environments at
this initial time.
A reliability theory relates component reliability testing to component parameters and to
lifetime or failure rate under testing. The theory then extrapolates these to lifetime or failure
rate under less stressful service conditions. The reliability specifications include values of the
component parameters needed to ensure the specified minimum lifetime or maximum failure
rate in service.
4.3.3 Interlinking
A large number of the test and measurement standards are already in place; the quality
assurance qualification approval standards which come under the banner of IECQ are already
in place and have been for many years. Alternative methods of quality assurance/quality
conformance are being developed other than those of capability approval and technology
approval, which are covered by IECQ CA 01 and IECQ 02.
With regard to interface, performance and reliability standards, once all these three standards
are in place, the matrix given in Table 2 demonstrates some of the other options available for
product standardisation.
Product A is fully IEC standardised, having a standard interface and meeting defined
performance and reliability standards.
Product B is a product with a proprietary interface but which meets a defined IEC performance
standard and a reliability standard.
Product C is a product which complies with an IEC standard interface but does not meet the
requirements of either an IEC performance standard or a reliability standard.
Product D is a product which complies with both an IEC standard interface and performance
standard but does not meet any reliability requirements.
Obviously, the matrix is more complex than shown since there will be a number of interface,
performance and reliability standards which will be able to be cross-related. In addition, the
products may all be subjected to a quality assurance programme that could be under IEC
Qualification Approval, Capability Approval, Technology Approval (as Table 3 attempts to
demonstrate), or even under a national or company quality assurance system.
Table 2 – Standards interlink matrix
Interface standard Performance Reliability
standard standard
Product A YES YES YES
Product B NO YES YES
Product C YES NO NO
Product D YES YES NO
Table 3 – Quality assurance options
Company A Company A Company A
QA CA TA QA CA TA QA CA TA
Product A X  X   X
Product B X  X  X
Product C X  X  X
Product D X   X  X
4.4 Design and construction
4.4.1 Materials
The devices shall be manufactured with materials which meet the requirements of the relevant
specification.
When non-flammable materials are required, the requirement shall be specified in the relevant
specification, and IEC 60695-11-5 shall be referenced.
4.4.2 Workmanship
Components and associated hardware shall be manufactured to a uniform quality and shall be
free of sharp edges, burrs or other defects that would affect life, serviceability or appearance.
Particular attention shall be given to neatness and thoroughness of marking, plating, soldering,
bonding, etc.
– 16 – IEC 63032:2018 © IEC 2018
4.5 Performance requirements
Fibre optic tuneable bandpass filters shall meet the performance requirements specified in the
relevant specification.
4.6 Identification and marking
4.6.1 General
Components, associated hardware and shipping packages shall be permanently and legibly
identified and marked when required by the relevant specification.
4.6.2 Component marking
Component marking, if required, shall be specified in the relevant specification. The preferred
order of marking is the following:
a) port identification;
b) manufacturer's part number (including serial number, if applicable);
c) manufacturer's identification mark or logo;
d) manufacturing date;
e) variant identification number;
f) any additional marking required by the relevant specification.
If space does not allow for all the required marking on the component, each unit shall be
individually packaged with a data sheet containing all of the required information which is not
marked.
4.6.3 Package marking
Several devices may be packaged together for shipment.
Package marking, if required, shall be specified in the relevant specification. The preferred
order of marking is the following:
a) manufacturer's identification mark or logo;
b) manufacturer's part number;
c) manufacturing date code (year/week according to ISO 8601);
When applicable, individual unit packages (within the sealed package) shall be marked with
the reference number of the certified record of released lots, the manufacturer's factory
identity code and the component identification.
4.7 Packaging
Packages shall include instructions for use when required by the specification.
4.8 Storage conditions
Where short-term degradable materials, such as adhesives, are supplied with the package,
the manufacturer shall mark these with the expiry date (year and week numbers according to
ISO 8601) together with any requirements or precautions concerning safety hazards or
environmental conditions for storage.

4.9 Safety
Fibre optic tuneable bandpass filters, when used on an optical fibre transmission system
and/or equipment, may emit potentially hazardous radiation from an uncapped or
unterminated output port or fibre end.
The fibre optic tuneable bandpass filter manufacturers shall provide sufficient information to
alert system designers and users about the potential hazard and shall indicate the required
precautions and working practices.
In addition, each relevant specification shall include the following:
WARNING NOTE
Care should be taken when handling small diameter fibre to prevent puncturing the skin,
especially in the eye area. Direct viewing of the end of an optical fibre or an optical
fibre connector when it is propagating energy is not recommended unless prior
assurance has been obtained as to the safety energy output level.
Reference shall be made to IEC 60825-1, the relevant document on safety.

– 18 – IEC 63032:2018 © IEC 2018
Annex A
(informative)
General information of tuneable bandpass filters
Fibre optic tuneable bandpass filters are devices which have all of the following general
features:
– they modify the spectral intensity distribution in order to select some wavelengths and
inhibit others;
– they have input and output ports or a common port (having both functions: input and
output) for the transmission of optical power.
The configuration of tuneable bandpass filters can be classified based on two functional
principles into two categories:
– interferometers based on Fabry-Perot configuration;
– diffraction gratings.
They can tune or modify the spectral intensity distribution using the following effects:
– electro-optic;
– thermo-optic;
– acousto-optic;
– magneto-optic;
– mechanical.
Annex B
(informative)
Examples of tuneable bandpass filter technologies
B.1 Tuneable filter using thermo-optic effects
Figure B.1 and Figure B.2 show examples of tuneable bandpass filter using thermo-optic
effects. Figure B.1 shows the multiple-cavity thin film filter. The dielectric material used in thin
film filter has large thermo-optic coefficient. By changing the temperature of the heater, the
effective index of the dielectric material could be changed.
Optical beam
Heater film
Thin film filter
IEC
Figure B.1 – Thermally tuneable thin film filter
Figure B.2 shows the waveguide Bragg grating filter. The material used in waveguide Bragg
grating has large thermo-optic coefficient. By changing the temperature of the heater, the
period of Bragg grating could be changed.
Heater film
Waveguide Bragg grating
IEC
Figure B.2 – Thermally tuneable waveguide Bragg grating
Figure B.3 shows the fibre Bragg grating filter. By applying heat (or tension), the period of the
Bragg grating could be changed.
Heater tube
Core
Clad
Primary coating
IEC
Figure B.3 – Thermally tuneable fibre Bragg grating

– 20 – IEC 63032:2018 © IEC 2018
B.2 Tuneable filter using acousto-optic effects
Figure B.4 shows the example of tuneable bandpass filter with interferometric structure. By
changing the frequency of the radio frequency (RF) signal to the crystal, the diffraction angle
or the diffraction wavelength could be changed.
AO crystal
Diffracted optial beam
Optical beam
RF signal
Transducer
IEC
Key
AO acousto-optic
Figure B.4 – Acousto-optic tuneable bandpass filter
B.3 Tuneable filter using mechanical effects
Figure B.5, Figure B.6, Figure B.7 show the examples of tuneable bandpass filter using
mechanical effects. Figure B.5 shows the example of tuneable filter in which the transmitted
wavelength could be changed by rotating the thin film filter (thereby changing the incident
angle to the filter).
Thin film filter
Optical beam
Motor
IEC
Figure B.5 – Tuneable filter by changing the incident angle
Figure B.6 shows the example of tuneable filter in which the transmitted wavelength could be
changed by sliding the thin film filter along the rail to change the incident position of the filter.

Thin film filter
Optical beam
IEC
Figure B.6 – Tuneable filter by sliding the incident position
Figure B.7 shows the example of micro-electro mechanical systems (MEMS) tuneable filter.
By applying the voltage, the gap of two mirrors could be changed by the electro-static force,
therefore the interferometric wavelength could be changed.
Dual optical fibre
Lens
Half mirror
High reflection mirror
Gap control
MEMS chip
MEMS diaphragm
IEC
Figure B.7 – MEMS tuneable filter
B.4 Tuneable filter using piezoelectric effects
Figure B.8 is the example of the tuneable bandpass filter by gap control of the end-face of the
half coated mirror using piezoelectric effect.

– 22 – IEC 63032:2018 © IEC 2018
Piezoelectric for gap control
Optical beam
Half coated mirror
IEC
Figure B.8 – Tuneable bandpass filter by gap control using piezoelectric effect
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