IEC 61300-3-47:2014

IEC 61300-3-47 ®
Edition 1.0 2014-07
INTERNATIONAL
STANDARD
colour
inside
Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures –
Part 3-47: Examinations and measurements – End face geometry of PC/APC
spherically polished ferrules using interferometry

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IEC 61300-3-47 ®
Edition 1.0 2014-07
INTERNATIONAL
STANDARD
colour
inside
Fibre optic interconnecting devices and passive components – Basic test and

measurement procedures –
Part 3-47: Examinations and measurements – End face geometry of PC/APC

spherically polished ferrules using interferometry

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
Q
ICS 33.180.20 ISBN 978-2-8322-1708-5

– 2 – IEC 61300-3-47:2014 © IEC 2014
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Terms and definitions . 5
3 Measurement by interferometer . 7
3.1 General . 7
3.2 Ferrule/connector holder . 7
3.3 Optical interferometric system . 8
3.4 Microscope with camera. 8
4 Requirements for the interferometer . 8
4.1 XY calibration (radius of curvature) . 8
4.2 Z calibration (fibre height) . 8
4.3 Alignment of ferrule axis with the interferometer’s optical axis (apex offset
calibration) . 8
4.4 Tilt and key angle . 8
5 Measurement method . 8
5.1 General . 8
5.2 Measurement regions . 9
5.3 Measurement procedure for the radius of curvature . 9
5.4 Measurement procedure for the dome eccentricity (apex offset) . 10
5.5 Measurement procedure for fibre height . 10
6 Details to be specified . 13
Annex A (normative) Calibration for the interferometer . 14
A.1 XY calibration . 14
A.2 Z calibration . 14
A.3 Alignment of the ferule axis with the optical axis of the interferometer (“apex
offset calibration”) . 14
A.4 Tilt and key angle . 14
Annex B (informative) Measurement procedure for end face “angle error” of angled
convex polished ferrules . 15
Annex C (informative) Formula for calculating ferrule end face geometry . 17

Figure 1 – Radius of curvature of a spherically polished ferrule end face . 5
Figure 2 – Apex offset of a spherically polished ferrule end face . 6
Figure 3 – Fibre height of a spherically polished ferrule end face . 6
Figure 4 – Ferrule end face angle for spherically polished ferrules . 7
Figure 5 – Interferometer . 7
Figure 6 – Ferrule end face and measurement regions . 9
Figure 7 – Ferrule end face surface . 11
Figure 8 – Fitting region and averaging region of the ferrule end face surface . 11
Figure 9 – Converted end face surface of the ferrule . 12
Figure 10 – Converted ferrule end face surface without the extracting region . 12
Figure B.1 – Example of key error calculated from interference pattern for a convex
polished ferrule . 15

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIBRE OPTIC INTERCONNECTING
DEVICES AND PASSIVE COMPONENTS –
BASIC TEST AND MEASUREMENT PROCEDURES –

Part 3-47: Examinations and measurements –
End face geometry of PC/APC spherically
polished ferrules using interferometry

FOREWORD
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International Standard IEC 61300-3-47 has been prepared by subcommittee 86B: Fibre optic
interconnecting devices and passive components, of IEC technical committee 86: Fibre optics.
This standard merges IEC 61300-3-15, IEC 61300-3-16, IEC 61300-3-17 and IEC 61300-3-23.
After publication of this standard IEC 61300-3-15, IEC 61300-3-16, IEC 61300-3-17 and
IEC 61300-3-23 will be withdrawn.

– 4 – IEC 61300-3-47:2014 © IEC 2014
The text of this standard is based on the following documents:
FDIS Report on voting
86B/3773/FDIS 86B/3805/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 61300 series, published under the general title, Fibre optic
interconnecting and passive components – Basic test and measurement procedures, can be
found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
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understanding of its contents. Users should therefore print this document using a
colour printer.
FIBRE OPTIC INTERCONNECTING
DEVICES AND PASSIVE COMPONENTS –
BASIC TEST AND MEASUREMENT PROCEDURES –

Part 3-47: Examinations and measurements –
End face geometry of PC/APC spherically
polished ferrules using interferometry

1 Scope
This part of IEC 61300 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.
2 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
2.1
radius of curvature
B
radius
...