WG 4 - TC 86/SC 86B/WG 4

IEC 61300-2-38:2023 is available as IEC 61300-2-38:2023 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 61300-3-38:2023 presents two methods for testing the sealing performance of a fibre optic sealed closure and hardened connector using air pressure. This third edition cancels and replaces the second edition published in 2006. It constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) addition of sealed hardened connectors;
b) recommended test severities from IEC 61753-1;
c) test configurations for hardened connectors and adaptors.

IEC 61300-2-26: 2023 provides a test to determine the corrosion resistance of the metals used in the construction of fibre optic interconnecting devices and passive components. This document determines if dissimilar metals have been well finished to prevent corrosion. The requirements of the tests for these devices are defined in IEC 61753-1. This third edition cancels and replaces the second edition published in 2006. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) addition of Clause 3, Terms and definitions;
b) harmonisation with IEC 61753-1:2018 and addition of Table 2;
c) harmonisation with IEC 60068-2-11:2021

IEC 61300-3-45:2023 is available as IEC 61300-3-45:2023 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 61000-3-45:2023 describes the procedure required to measure the statistical distribution and mean attenuation for random mated optical connectors with physical contact (PC) and angled physical contact (APC) polished multi-fibre rectangular ferrules as defined in the IEC 61754 series. This measurement method is applicable to cable assemblies. This second edition cancels and replaces the first edition published in 2011. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) addition of sample size for > 12-fibre connector measurement;
b) inclusion of guidance for multimode measurement.

IEC 61300-3-4:2023 is available as IEC 61300-3-4:2023 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 61300-3-4: 2022 describes the various methods available to measure the attenuation of optical components. It is not, however, applicable to random mate attenuation measurements as described in IEC 61300-3-34 and IEC 61300-3-45 nor for attenuation measurements of dense wavelength division multiplexing (DWDM) devices as described in IEC 61300-3-29. This fourth edition cancels and replaces the third edition published in 2012. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) addition of Clause 3 containing terms, definitions and abbreviated terms;
b) addition of a new LSPM measurement method, insertion method (D);
c) addition of Annex A describing attenuation measurement of multicore fibre;
d) changed reference test method to insertion C and alternative test method to substitution or insertion D for power meter and type 4 DUT.
The contents of the corrigendum of June 2023 have been included in this copy.

IEC 61300-2-1:2023 is available as IEC 61300-2-1:2023 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 61300-2-1:2023 evaluates the effects of vibration on fibre optic devices at the predominant frequency ranges and magnitudes that are encountered during field service on attenuation. NOTE Most vibrations encountered in service are not of a simple harmonic nature. However, it has been shown that tests based on vibrations of this type are satisfactory to simulating actual service. This fourth edition cancels and replaces the third edition published in 2009. This edition constitutes a technical revision. This edition includes the following significant technical change with respect to the previous edition: harmonizing with the test conditions in IEC 61753-1:2018 and revising severities.

IEC 61300-2-18:2023 is available as IEC 61300-2-18:2023 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 61300-2-18:2023 details a procedure to determine the suitability of a fibre optic interconnecting device, passive component, splices or closure to withstand the environmental condition of extended high temperature that occur during operation, storage and/or transport. The test is intended to indicate the performance of such devices when exposed to heat of constant temperature over a given period. In general terms, this test provides a high temperature to induce potential failures due to softening and expansions. This procedure does not assess the ability of a device to operate during temperature variations; in this case, IEC 61300-2-22 is used. This third edition cancels and replaces the second edition published in 2005. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- terms and definitions updated according to IEC 61753-1:2018;
- test severities updated according to IEC 61753-1:2018;
- simplification of the combination of temperature and exposure time.

IEC 61300-3-35:2022 is concerned with the observation and classification of debris, scratches and defects. The inspection requirements are based on IEC TR 62627-05. Advice for cleaning of contamination from fibres/ferrule is found in IEC TR 62627-01 and a recommendation is given in Annex D. IEC TR 62572-4 provides the cleaning method for a stub for optical transceivers. Visual inspection is in addition to, and does not replace measurement of performance parameters such as attenuation and return loss, or end face parameters. The dimensions specified are chosen such that they can be easily estimated. Not only the zones A and B on the fibre are inspected for defects and scratches but the whole contact area (where the two fibres/ferrules meet when mated) needs to be inspected for contamination (this is up to 250 µm diameter for cylindrical ferrules and the whole ferrule surface for rectangular ferrules).The objectives of this document are the following:
- specify the minimum criteria for a microscope to be compliant to this document;
- specify the procedure and criteria for inspecting fibre-optic end faces for cleanliness to determine if the end faces are fit for use. All connector optical interfaces (IEC 61755 series and IEC 63267 series) are based on physical contact between fibre cores;
- provide quantitative criteria for the analysis of end face images.
This third edition cancels and replaces the second edition published in 2015. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- adding of a statement that visual inspection is not a substitute for optical qualification such as attenuation and return loss measurement;
- adding of some terms and definitions;
- adding requirements for SM 35 dB connectors;
- adding of a sentence in Clause 5 concerning the susceptibility of the methods to system variability and variability within systems from same supplier;
- removal of inspection requirements for zones C and D;
- insertion of a generic cleanliness specification for whole rectangular ferrule and 250 µm area around every fibre;
- adding a cleaning recommendation for rectangular and cylindrical ferrules;
- outer edge of inspection zone B has changed from 115 µm to 110 µm to meet manufacturing tolerances of fixture for microscopes;
- change that defects that are partly in core are only to be judged for the part they are in the core. The remainder of the defect is considered to be located in the cladding.
- adding a statement that a connector cannot be rejected by just failing visual inspection. Meeting the specified optical performance determines the use of this connector.

IEC 61300-2-5:2022 determines the ability of the cable attachment element of the device under test (DUT) to withstand torsional loads that can be experienced during installation and normal service. This fourth edition cancels and replaces the third edition published in 2009. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- the terms and definitions clause was added;
- the procedure description was modified;
- new subsections are included in Clause 6 for a better sequence description;
- Figure 1 was improved and Figure 2 was updated in text descriptions;
- the severity of the test was updated according to the component and operation conditions.

IEC 61300-2-43:2022 is available as IEC 61300-2-43:2022 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 61300-2-43: 2022 aims at screening single-mode physical contact (PC) optical fibre connector plugs of an optical fibre patch cord or an optical fibre pigtail in terms of return loss, thus ensuring minimum return loss when the connector plugs are randomly mated with each other in the field. This document is intended to apply to cylindrical ferrule connector plugs. This third edition cancels and replaces the second edition published in 2014. This edition constitutes a technical revision. This edition includes the following significant technical change with respect to the previous edition: addition of Clause 3 containing terms, definitions, and abbreviated terms.

IEC 61300-1:2022 is available as IEC 61300-1:2022 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 61300-1:2022 provides general information and guidance for the basic test and measurement procedures defined in IEC 61300-2 (all parts) and IEC 61300-3 (all parts) for interconnecting devices, passive components, mechanical splices, fusion splice protectors, fibre management systems and protective housings. This document is used in combination with the relevant specification which defines the tests to be used, the required degree of severity for each of them, their sequence, if relevant, and the permissible performance limits. In the event of conflict between this document and the relevant specification, the latter takes precedence. This fifth edition cancels and replaces the fourth edition published in 2016. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- addition of the information of measurement uncertainties in 4.2.1;
- change of the requirements for attenuation variation in 4.2.2;
- addition of the multimode launch conditions of other fibres than A1-OM2, A1-OM3, A1-OM4, A1-OM5 and A3e in 10.4;
- addition of the multimode launch conditions of the planer waveguide in 10.6;
- splitting Annex A for EF and Annex B for EAF;
- correction of errors in the definitions of encircled flux and encircled angular flux.

IEC TS 63334:2021 which is a technical specification, defines the conditions for testing the protection against dust and water ingress of passive optical protective housings and hardened fibre optic connectors (IP5X, IPX4, IPX5, IPX6) performed according to IEC 60529. The conditions in this document supplement the test requirements specified in IEC 60529. Protective housings and hardened connectors containing electrical conductors, electrical connections, passive electrical components, active electrical equipment or electronics that transmit signals or provide power are not within the scope of this document.

IEC 61300-3-7:2021 describes methods available to measure the wavelength dependence of attenuation and return loss of two-port, single mode passive optical components. It is not, however, applicable to dense wavelength division multiplexing (DWDM) devices. Measurement methods of wavelength dependence of attenuation of DWDM devices are described in IEC 61300-3-29. There are two measurement cases described in this document:
a) measurement of attenuation only;
b) measurement of attenuation and return loss at the same time.
This third edition cancels and replaces the second edition published in 2009. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) reduction of the number of alternative methods proposed to bring in-line with industry practice;
b) re-statement of the equations for insertion loss and return loss using logarithmic forms more common in the industry;
c) additional recommendations with respect to the creation of fibre terminations;
d) additional discussion on the characterization of the optical sources used in this document;
e) simplification of bi-directional testing;
f) removal of separate return loss only measurement procedures.

IEC 61300-2-10:2021 is available as IEC 61300-2-10:2021 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 61300-2-10:2021 evaluates the effect of loads which is possible to occur when fibre optic devices are exposed to critical situations such as being stepped on, being run over by vehicle tyres, when an evenly-distributed static load is applied to the top surface of a street cabinet or when a load is applied to a street cabinet's open door. This third edition cancels and replaces the second edition published in 2012. This edition includes the following significant technical changes with respect to the previous edition:
- addition of testing an evenly distributed static load applied on the top surface of a street cabinet;
- addition of testing a static load applied to a street cabinet door;
- addition of descriptions to perform the test at a specified temperature other as specified in the standard atmospheric conditions and addition of test temperature(s) in Table 1;
- update of the severities according to IEC 61753-1:2018.

IEC 61300-2-14:2021 is available as IEC 61300-2-14:2021 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 61300-2-14:2021 describes a procedure for determining the suitability of a fibre optic interconnecting device or a passive component to withstand exposure to the optical power which occurs during its operation. This fourth edition cancels and replaces the third edition published in 2012. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- harmonizing IEC 61300-1:2016 and IEC 61300-3-4:2012;
- addition of abbreviated terms;
- addition of Clause A.2 regarding input optical power from both ends.

IEC 61300-3-53:2020 is available as IEC 61300-3-53:2020 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 61300-3-53:2020 defines the encircled angular flux measurement of multimode waveguide light sources, in which most of the transverse modes are excited. The term "waveguide" is understood to include both channel waveguides and optical fibres but not slab waveguides. The applicable fibre types are the followings:
- A1 specified in IEC 60793-2-10;
- A3 specified in IEC 60793-2-30;
- A4 specified in IEC 60793-2-40.
This second edition cancels and replaces the first edition in 2015. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- the scope of the applicable wave guides, and graded index multimode optical wave guide and fibre have been included;
- the structure of 5.3 has been rearranged;
- Annex C and Annex D have been added.
The contents of the corrigendum of June 2023 have been included in this copy.

IEC 61300-3-30:2020 is available as IEC 61300-3-30:2020 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 61300-3-30:2020 describes a method of measuring the end face geometry of rectangular multifibre ferrules having an IEC defined optical interface. The primary attributes are fibre position relative to the end face, either withdrawal or protrusion, end face angle relative to the guide pin bores, fibre tip radii and core dip for multimode fibres. This second edition cancels and replaces the first edition published in 2003. This edition constitutes a technical revision.This edition includes the following significant technical changes with respect to the previous edition:
- measurement of the individual fibre tip radii;
- introduction of the geometry limit (GL) metric;
- introduction of the minus coplanarity metric;
- new method for measuring the core dips;
- all measurement regions are now identical for MM and SM fibres;
- the ferrule surface angle sign convention has been changed.

IEC 61300-2-56:2020 describes the test procedure to test the wind resistance of a protective housing and its mounting hardware using the fastening parts recommended by the manufacturer. The protective housing is considered to have a cuboid shape. The applied force in this test procedure simulates a steady wind load from each direction to a protective housing and its mounting hardware fixed to a support.

IEC 61300-3-55: 2020 provides methods for measuring the polarisation extinction ratio (PER) of single-mode, polarisation maintaining (PM) optical components based upon PM fibres. This document also provides methods for detecting the input and output orientation of the PM components' principal axes as well as methods for estimating the keying accuracy, i.e. the angular misalignment between the principal axes and the mechanical reference guide key of the connectors, if these are present.

IEC 61300-2-54:2019 is to assess the corrosive effects of atmospheres polluted with mixed gas on fibre optic devices. It can be considered as a general corrosion test, but it does not predict the performance of a device in use.

IEC 61300-3-21:2019 is available as IEC 61300-3-21:2019 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 61300-3-21:2019 describes a method to measure the switching time and related performance parameters of a fibre optic spatial switch when the actuation energy is applied or removed to change the state of the switch. This third edition cancels and replaces the second edition published in 2014. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- changes to remove redundant overlap with IEC 60876-1;
- clarifications to definitions and diagrams;
- generalization of the detection apparatus beyond an oscilloscope.
Keywords: switching time, performance parameters of a fibre optic spatial switch, actuation energy

IEC 61300-3-54:2019 describes the procedure to measure the angular misalignment between the ferrule bore axis and the outside diameter datum axis of a cylindrical ferrule.
Keywords: ferrule bore, angular misalignment

IEC 61300-2-46:2019 is available as IEC 61300-2-46:2019 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 61300-2-46:2019 describes a test to determine the suitability of a fibre optic device to withstand the environmental condition of high humidity and change of temperature which can occur in actual use, storage and/or transport. The test is primarily intended to determine the suitability of fibre optic components under conditions of high humidity – combined with cyclic temperature changes and, in general, producing condensation on the surface of the device under test (DUT). Absorption of moisture can result in swelling that would destroy functional utility, cause loss of physical strength, and cause changes in other important mechanical properties. Degradation of optical properties can also occur. Although not necessarily intended as a simulated tropical test, this test can, nevertheless, be useful in determining moisture absorption of insulating or covering materials. This second edition cancels and replaces the first edition published in 2006. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) complete revision to harmonize with IEC 60068-2-30;
b) addition of detail description Clause 4, General description;
c) addition of detail description Clause 5, Apparatus;
d) addition of detail description Clause 6, Procedure.
Keywords: suitability of fibre optic devices to withstand the environmental condition
The contents of the corrigendum 1 of February 2022 have been included in the English part of this of copy.

IEC 61300-2-4:2019 is available as IEC 61300-2-4:2019 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 61300-2-4:2019 is to ensure that the retention or attachment of the fibre, cord or cable in a fibre optic device or an enclosure This second edition cancels and replaces the first edition published in 1995. This edition includes the following significant technical changes with respect to the previous edition:
a) addition of Clause 2, Normative references;
b) clarification of the test procedures;
c) clarification of the severities;
d) modification of the whole document structure according to the latest ISO/IEC Directives.
Keywords: tensile load applied to the fibre, cord or cable

IEC 61300-2-55:2017 describes the test procedure to measure the mounting strength of an optical adaptor or receptacle to a fixture.

IEC 61300-2-9: 2017 defines a test method to reveal mechanical weakness and/or degradation of fibre optic devices when subjected to repetitive or non-repetitive mechanical shocks. It simulates infrequent repetitive or non-repetitive shocks likely to be encountered in normal service or during transportation. This third edition cancels and replaces the second edition published in 2010. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- inserted clause "Terms and definitions";
- added precise descriptions to clause "Apparatus";
- added sub clause "Testing" into clause "Procedure";
- added "Bibliography".

IEC 61300-3-25:2016 describes the procedure to determine the concentricity of the axis of the bore in a non-angled ferrule with the axis of the ferrule, and in the case of non-angled ferrules with fibre installed, to determine the concentricity of the axis of the fibre core with the axis of the ferrule. This third edition cancels and replaces the second edition published in 2013 and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- deletion of method C due to potential damage of ferrule end face by the spindle. Method C is the ferrule bore reference method for bare ferrules according to IEC 61300-3-25:2013;
- separation of original method A into method A-1 and method A-2 relating to the two different types of ferrule (with/without fibre fitted);
- integration of the content of Annexes A and B into the test procedure. Keywords: concentricity, ferrule

IEC 61300-1:2016 provides general information and guidance for the basic test and measurement procedures defined in the IEC 61300-2 and IEC 61300-3 series for interconnecting devices and passive components. This standard should be used in combination with the relevant specification which will define the tests to be used, the required degree of severity for each of them, their sequence, if relevant, and the permissible performance limits. In the event of conflict between this basic standard and the relevant specification, the latter will take precedence. This fourth edition cancels and replaces the third edition published in 2011. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: reconsideration of the terms and definitions; addition of Clause 4. Keywords: test and measurement procedures for interconnecting devices and passive components

IEC 61300-2-47:2016 details a procedure for determining the suitability of a fibre optic device to withstand the effects of thermal shock. In practice, this means a very short change over time between extreme temperatures. This fourth edition cancels and replaces the third edition published in 2010. This edition constitutes a technical revision. This edition includes the following significant technical change with respect to the previous edition: review of temperature limit in the test severity. Keywords: thermal shock, extreme temperatures

IEC 61300-2-37:2016 describes a test for the effectiveness of the sealing and clamping hardware of a fibre optic closure when the cable entering or exiting the fibre optic closure is subjected to bending. This third edition cancels and replaces the second edition published in 2006. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- substantial updating of Subclauses 4.1, 6.5, 6.7 and Figure 1;
- addition of severities which are determined by the number and direction of cable bends, test temperature and overpressure for each environmental category according to IEC 61753-1. Keywords: sealing and clamping hardware of a fibre optic closure, cable bending

IEC TR 62627-08:2016 which is a Technical Report, describes two methods used to measure the blocking characteristics of adaptors with an optical power blocking shutter. This document focuses on singlemode fibre (SMF) and two wavelengths, 1 310 nm and 1 550 nm. Keywords: blocking characteristics, optical power blocking shutter

IEC 61300-3-35:2015 is available as IEC 61300-3-35:2015 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 61300-3-35:2015 describes methods for quantitatively assessing the end face quality of a polished fibre optic connector or of a fibre optic transceiver using a fibre-stub type interface. Sub-surface cracks and fractures are not considered in this standard. In general, the methods described in this standard apply to 125 μ cladding fibres contained within a ferrule and intended for use with sources of ≤ 2 W of input power. However, portions are applicable to non-ferruled connectors and other fibre types. Those portions are identified where appropriate. It is not the intention of this standard that the size of scratches should be measured, the dimensions and requirements are selected such that they can be estimated. There is no need to measure for example if a scratch is 2,3 μm wide. This second edition cancels and replaces the first edition published in 2009 and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- modification to the title;
- addition of some terms and definitions;
- reconsideration of the specific values of Tables 1 to 4 to reflect the current market situation;
- addition of visual requirements for single-mode transceivers using a fibre-stub interface in Table 3;
- addition of a sentence in 4.1 concerning the susceptibility of the methods to system variability. Keywords: end face quality of a polished fibre optic connector, fibre optic transceiver using a fibre-stub type interface

IEC 61300-3-53:2015 is intended to characterize the encircled angular flux of measurement step index multimode waveguide light sources, in which most of the transverse modes are excited. The term waveguide is understood to include both channel waveguides and optical fibres but not slab waveguides in this standard. Encircled angular flux (EAF) is the fraction of the total optical power radiating from a step index multimode waveguide's core within a certain solid angle. The EAF is measured as a function of the numerical aperture full angle. The basic approach is to collect, for every measurement, two dimensional far field data using a calibrated camera and to convert them mathematically into encircled angular flux.
Keywords: encircled angular flux (EAF), measurement step index multimode waveguide light sources

IEC 61300-3-51:2014 is intended to describe the procedure required to measure the pin gauge withdrawal force for rectangular ferrule multi-fibre connectors. This measurement can be used as an alternative to the measurement of the pin gauge insertion force, both of which evaluate the fit of the pin gauge(s) into the guide pin hole(s) of the female-type connector. The experimental verification of interchangeability between them is shown in Annex A. For the male-type connector, IEC 61300-3-49 is applied to evaluate how securely the guide pins are retained in the guide holes. Keywords: pin gauge withdrawal force, pin gauge insertion force

IEC 61300-3-14:2014 provides a method to measure the error and repeatability of the attenuation value settings of a variable optical attenuator (VOA). There are two control technologies for VOAs, manually controlled and electrically controlled. This standard covers both control technologies of VOAs and also covers both single-mode and multimode fibre VOAs. This third edition cancels and replaces the second edition published in 2006 and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- title modification replacing the word "accuracy" by "error";
- inclusion of the distinction of manually and electrically controlled variable optical attenuators in the Scope;
- revision of clauses for apparatus and details to be specified to harmonize with other standards in the IEC 61300 series;
- addition of "the maximum deviation of attenuation from setting" to the clause for calculation;
- addition of "measurement method of hysteresis characteristics" in Annex B. Keywords: attenuation value settings, variable optical attenuator (VOA)

IEC 61300-3-47:2014 describes a procedure to measure the end face geometry of a spherically polished ferrule or connector. Within this standard the words "ferrule" and "connector" can be used interchangeably.
Keywords: end face geometry, spherically polished ferrule or connector

IEC 61300-2-43:2014 aims at screening single-mode physical contact (PC) optical fibre connectors of an optical fibre cord or an optical fibre pigtail in terms of return loss, thus ensuring minimum return loss when the connectors, which have been screen tested by this method, are randomly mated with each other in the field. This second edition of IEC 61300-3-43 cancels and replaces the first edition published in 1999 and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- revision of the scope;
- revision of the procedure;
- addition of measurement uncertainty into the 'Details to be specified';
- addition of a bibliography.
Keywords: single-mode physical contact (PC) optical fibre connectors, return loss

IEC 61300-3-29:2014 identifies two basic measurement methods for characterizing the spectral transfer functions of DWDM devices. The transfer functions are the functions of transmittance dependent of wavelengths. In this standard, optical attenuations are also used. The transfer functions can be used to produce measurements of insertion loss (IL), polarization dependent loss (PDL), isolation, centre wavelength, bandwidth (BW) and other optical performances. This second edition cancels and replaces the first edition published in 2005. It constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- terms and definitions have been added and reconsidered in order to be harmonized with IEC 62074-1;
- characterizations of the device under test have been reviewed;
- details to be specified have been reconsidered. Keywords: spectral transfer functions of DWDM devices, measurements of insertion loss (IL), polarization dependent loss (PDL), isolation, centre wavelength, bandwidth (BW)

IEC 61300-2-35:2014 details procedures for determining the suitability of a fibre optic device to withstand nutation that may occur during operation, service, storage and/or transport. The test is intended to indicate the performance of such devices when exposed to torsion and bending as a combined load. This second edition cancels and replaces the first edition, published in 1995, and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- addition of new normative references;
- addition of new terms and definitions;
- addition of two figures for test apparatus: one with horizontal rotation DUT, one with rotating deflection unit;
- severity reconsidered. Keywords: nutation, fibre optic device

IEC 61300-2-42:2014 specifies a test to determine the influence of a side load applied to a cord assembled with a strain relief. The intention is to simulate a static load, due to a length of fibre cable, which would typically be experienced during service. Components should withstand side loads during optical transmission without degradation of the optical performance. Besides a boot, any feature that controls the bending radius of the fibre can be considered as strain relief. This third edition cancels and replaces the second edition published in 2005 and constitutes a technical revision. This edition includes the following significant technical change with respect to the previous edition: modification of the severity according to cable configurations. Keywords: side load, static load, optical performance, strain relief

IEC 61300-3-52:2014 describes a procedure to measure guide hole and alignment pin deformation constant, CD for 8 degree angled PC rectangular ferrule multi-fibre connectors. Keywords: measure guide hole, alignment pin deformation constant, CD, 8 degree angled PC rectangular ferrule multi-fibre connectors

IEC 61300-3-25:2013 describes the procedure to determine the concentricity of the axis of the bore in a non-angled ferrule with the axis of the ferrule, or in the case of non-angled ferrules with fibre installed, to determine the concentricity of the axis of the fibre core with the axis of the ferrule. This second edition cancels and replaces the first edition published in 1997 and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- reconsideration of method A with the idea of applying a signal processor;
- introduction of two new annexes (A and B). Keywords: concentricity of the axis of the bore, non-angled ferrule

IEC 61300-2-28:2013 assesses the corrosive effects of atmospheres polluted with sulphur dioxide on fibre optic devices. The procedure is only suitable for comparative purposes. It can be considered a general corrosion test, but which does not predict the behaviour of the devices in use. This second edition cancels and replaces the first edition published in 1995. It constitutes a technical revision. The main change with respect to the previous edition is the reconsideration of Clauses 5 and 6, Procedure and Severity, respectively. Keywords: corrosive effects of atmospheres polluted with sulphur dioxide on fibre optic devices, corrosion test

IEC 61300-3-48:2013 describes the procedure required to measure the spring compression force of the coupling sleeve for rectangular ferrule multi-fibre connectors. Key words: spring compression force, coupling sleeve for rectangular ferrule multi-fibre connectors

IEC 61300-2-44:2013 specifies a test to determine the influence of flexing under tensile load of the strain relief of fibre optic devices. The intention is to simulate the number of flexing cycles which would typically be experienced during service life. This test is applied to both single fibre cable and multiple fibre cable. This third edition cancels and replaces the second edition published in 2008 and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- revision of Figure 1;
- change of fibre length from the flex point to the weight. Key Words: flexing under tensile load of the strain relief of fibre optic devices

IEC 61300-3-50:2013 describes the procedure to measure the crosstalk of optical signals between the ports of a multiport M x N (M input ports and N output ports) fibre optic spatial switch. The crosstalk is defined as the ratio of the optical power at an output port which comes from the unconnected input port, to the optical power at the output port which comes from the connected input port. Keywords: measure the crosstalk of optical signals The contents of the corrigenda of January 2015 and of July 2015 have been included in this copy.

IEC 61300-2-7:2013 details a procedure for determining the suitability of a fibre optic device to withstand the environmental condition of a bending moment which may occur in actual use, storage and/or transport. The test is primarily intended to permit the observation of effects of a bending moment. The bending moment may result in effects that would destroy functional utility, cause loss of physical strength, and cause changes in other important mechanical properties. Degradation of optical properties may also occur. The specimen may be a component, a connector set, a splice or other device combination intended for fibre optic usage. This second edition cancels and replaces the first edition published in 1995. It constitutes a technical revision.This edition includes the following significant technical changes with respect to the previous edition:
- a complete reconsideration of the entire document, including additional normative references;
- clarification of the device under test (DUT);
- clarification of the relationship between severities, performance categories and the DUT. Keywords: suitability of a fibre optic device to withstand the environmental condition of a bending moment

IEC 61300-3-49:2013 describes the procedure required to measure the guide pin retention force for rectangular ferrule multi-fibre connectors in order to ensure that the pins remain in place during mating/unmating. Keywords: guide pin retention force for rectangular ferrule multi-fibre connectors

IEC 61300-3-4:2012 describes the various methods available to measure the attenuation of optical components. It is not, however, applicable to dense wavelength division multiplexing (DWDM) components, for which IEC 61300-3-29 should be used. This third edition cancels and replaces the second edition published in 2001. It constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- revision of source conditions, launch conditions and power meter parameters;
- addition of safety recommendations;
- removal of launch condition details for multimode fibres, now referenced in 61300-1. Key words: measure the attenuation of optical components