IEC 62496-4-214:2020

Optical circuit boards - Part 4-214: Interface standards - Terminated waveguide OCB assembly using a single-row thirty-two-channel symmetric PMT connector

IEC 62496-4-214:2020 defines the standard interface dimensions for a terminated waveguide optical circuit board (OCB) assembly (referred to simply as "assembly") using single-row thirty-two-channel connectors for polymer waveguides connected with a symmetric PMT connector.

Cartes à circuits optiques - Partie 4-214: Normes d'interface - Terminaison d'un ensemble de cartes à circuits optiques à guides d'ondes utilisant un connecteur PMT symétrique de trente-deux canaux sur une seule rangée

IEC 62496-2-214:2020 définit les dimensions d’interface normalisées pour la terminaison d'un ensemble de cartes à circuits optiques (OCB: optical circuit board) à guides d'ondes (désigné plus simplement sous le terme "ensemble") qui utilise des connecteurs de trente-deux canaux sur une seule rangée pour des guides d’ondes en polymère connectés par un connecteur PMT symétrique.

General Information

• Status: Published
• Publication Date: 12-May-2020
• ICS: 33.180.01 - Fibre optic systems in general
• Technical Committee: TC 86 - Fibre optics
• Drafting Committee: JWG 9 - TC 86/JWG 9
• Current Stage: PPUB - Publication issued
• Start Date: 11-Jun-2020
• Completion Date: 13-May-2020

Overview

IEC 62496-4-214:2020 specifies the interface dimensions and mechanical requirements for a terminated waveguide optical circuit board (OCB) assembly using a single-row thirty-two-channel symmetric PMT connector. The standard covers the geometry and mating features required to align polymer waveguide cores on an OCB with the optical fibers of an MT-type connector, including guide-pin positions, clamp spring characteristics and example component dimensions in annexes.

Keywords: IEC 62496-4-214, optical circuit boards, terminated waveguide, PMT connector, single-row thirty‑two‑channel, waveguide OCB, interface dimensions, MT connector.

Key topics and requirements

• Scope and purpose: Defines standard interface dimensions for a terminated waveguide OCB assembly using a symmetric PMT connector matched to a single-row 32-channel ferrule.
• Connector form factor: The symmetric PMT connector shares the same outer dimensions as the MT connector type specified in IEC 61754‑5 and mates with MT-style ferrules; it is not intermateable with standard 16‑channel MT ferrules.
• Alignment and origin: The X-axis is defined by the line connecting two guide-pin hole centres; the origin is the midpoint between those guide holes - used as the reference for core positions and interface tolerances.
• Core positions and dimensions: Precise X/Y coordinates and tolerances for the 32 channel core locations are provided (see tables and figures in the standard).
• Guide pins and clamp spring: Interface dimensions for guide pins (e.g., pin diameter and length ranges) and clamp spring are specified. Example values:
  • Guide pin diameter A: 0.547–0.549 mm, length D: 10.8–11.2 mm
  • Clamp spring free length and required compression force: clamping compression force shall be 6.8 N to 12.8 N when M2 is between 15.8 mm and 16.2 mm
• Annex examples: Informative annexes provide example component dimensions for a symmetric PMT body, waveguide OCB port positions, and a single‑row 32‑channel MT ferrule.

Applications

• Standardizes mechanical mating for high‑density planar waveguide interconnects in:
  • Optical backplanes and board-to-board links
  • Data-center and telecom optical modules
  • High-density polymer waveguide assemblies and flexible OCBs
• Useful where precise optical alignment, repeatable mating and mechanical compatibility with MT-style ferrules are required.

Who should use this standard

• Connector and OCB designers, optical interconnect manufacturers, test laboratories, system integrators and procurement/specification engineers developing or verifying high‑density polymer waveguide assemblies.

Related standards

• IEC 62496‑1 (Optical circuit boards - General)
• IEC 62496‑4 (Part 4 - Interface standards: General and guidance)
• IEC 61754‑5 (MT connector family)

Standards Content (Sample)

IEC 62496-4-214 ®
Edition 1.0 2020-05
INTERNATIONAL
STANDARD
Optical circuit boards –
Part 4-214: Interface standards – Terminated waveguide OCB assembly using
a single-row thirty-two-channel symmetric PMT connector
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
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IEC Central Office Tel.: [phone]
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About the IEC
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International Standards for all electrical, electronic and related technologies.

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IEC 62496-4-214 ®
Edition 1.0 2020-05
INTERNATIONAL
STANDARD
Optical circuit boards –
Part 4-214: Interface standards – Terminated waveguide OCB assembly using

a single-row thirty-two-channel symmetric PMT connector

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.180.01 ISBN 978-2-8322-8307-3

– 2 – IEC 62496-4-214:2020 © IEC 2020
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Description . 5
5 Interface dimensions of thirty-two-channel for the assembly, guide pins and clamp
spring . 6
(informative) Dimensions of an example of components for the assembly . 10
A.1 Symmetric PMT connector . 10
A.2 Waveguide OCB . 11
(informative) Dimensions of an example of a single-row thirty-two-channel
MT ferrule . 13
Bibliography . 16

Figure 1 – Interconnection between the assembly and the MT connector . 6
Figure 2 – Interface dimensions of thirty-two-channel for the assembly . 6
Figure 3 – Interface views of thirty-two-channel for the assembly . 7
Figure 4 – Interface views of the guide pin . 8
Figure 5 – Interface views of the clamp spring . 8
Figure A.1 – An example of components of the symmetric PMT connector . 10
Figure A.2 – Expanded view of end-face for an example of the single-row thirty-two-
channel PMT body . 11
Figure A.3 – Positions of the example of thirty-two channel ports of OCB . 12
Figure B.1 – Interface dimensions of an example of single‑row thirty‑two‑channel
MT ferrule . 13
Figure B.2 – Interface views of an example of single-row thirty-two-channel MT ferrule . 14

Table 1 – Interface dimensions of thirty-two-channel for the assembly . 7
Table 2 – Positions of cores of thirty-two-channel for the assembly. 7
Table 3 – Interface dimensions of the guide pin . 8
Table 4 – Interface dimensions of the clamp spring . 9
Table A.1 – Interface dimensions of an example of the single-row thirty-two-channel for
PMT body . 11
Table A.2 – Positions of cores for an example of the thirty-two-channel ports of OCB . 12
Table B.1 – Interface dimensions of an example of single‑row thirty‑two‑channel
MT ferrule . 14
Table B.2 – Fibre hole positions of an example of single‑row thirty‑two‑channel
MT ferrule . 15

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL CIRCUIT BOARDS –
Part 4-214: Interface standards – Terminated waveguide OCB assembly
using a single-row thirty-two-channel symmetric PMT connector

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 this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications.
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 identifyi
...

IEC 62496-4-214 ®
Edition 1.0 2020-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Optical circuit boards –
Part 4-214: Interface standards – Terminated waveguide OCB assembly using
a single-row thirty-two-channel symmetric PMT connector

Cartes à circuits optiques –
Partie 4-214: Normes d'interface – Terminaison d'un ensemble de cartes à
circuits optiques à guides d'ondes utilisant un connecteur PMT symétrique
de trente-deux canaux sur une seule rangée

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
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About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.

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and withdrawn publications. Also known as the International Electrotechnical Vocabulary

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IEC 62496-4-214 ®
Edition 1.0 2020-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Optical circuit boards –
Part 4-214: Interface standards – Terminated waveguide OCB assembly using

a single-row thirty-two-channel symmetric PMT connector

Cartes à circuits optiques –
Partie 4-214: Normes d'interface – Terminaison d'un ensemble de cartes à

circuits optiques à guides d'ondes utilisant un connecteur PMT symétrique

de trente-deux canaux sur une seule rangée

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.01 ISBN 978-2-8322-9167-2

– 2 – IEC 62496-4-214:2020 © IEC 2020
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Description . 5
5 Interface dimensions of thirty-two-channel for the assembly, guide pins and clamp
spring . 6
(informative) Dimensions of an example of components for the assembly . 10
A.1 Symmetric PMT connector . 10
A.2 Waveguide OCB . 11
(informative) Dimensions of an example of a single-row thirty-two-channel
MT ferrule . 13
Bibliography . 16

Figure 1 – Interconnection between the assembly and the MT connector . 6
Figure 2 – Interface dimensions of thirty-two-channel for the assembly . 6
Figure 3 – Interface views of thirty-two-channel for the assembly . 7
Figure 4 – Interface views of the guide pin . 8
Figure 5 – Interface views of the clamp spring . 8
Figure A.1 – An example of components of the symmetric PMT connector . 10
Figure A.2 – Expanded view of end-face for an example of the single-row thirty-two-
channel PMT body . 11
Figure A.3 – Positions of the example of thirty-two channel ports of OCB . 12
Figure B.1 – Interface dimensions of an example of single‑row thirty‑two‑channel
MT ferrule . 13
Figure B.2 – Interface views of an example of single-row thirty-two-channel MT ferrule . 14

Table 1 – Interface dimensions of thirty-two-channel for the assembly . 7
Table 2 – Positions of cores of thirty-two-channel for the assembly. 7
Table 3 – Interface dimensions of the guide pin . 8
Table 4 – Interface dimensions of the clamp spring . 9
Table A.1 – Interface dimensions of an example of the single-row thirty-two-channel for
PMT body . 11
Table A.2 – Positions of cores for an example of the thirty-two-channel ports of OCB . 12
Table B.1 – Interface dimensions of an example of single‑row thirty‑two‑channel
MT ferrule . 14
Table B.2 – Fibre hole positions of an example of single‑row thirty‑two‑channel
MT ferrule . 15

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL CIRCUIT BOARDS –
Part 4-214: Interface standards – Terminated waveguide OCB assembly
using a single-row thirty-two-channel symmetric PMT connector

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 this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications.
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 62496-4-214 has been prepared by IEC technical committee 86:
Fibre optics.
The text of this International Standard is based on the following documents:
CDV Report on voting
86/563/CDV 86/564/RVC
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.
A list of all parts in the IEC 62496 series, published under the general title Optical circuit boards,
can be found on the IEC website.

– 4 – IEC 62496-4-214:2020 © IEC 2020
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.
OPTICAL CIRCUIT BOARDS –
Part 4-214: Interface standards – Terminated waveguide OCB assembly
using a single-row thirty-two-channel symmetric PMT connector

1 Scope
This part of IEC 62496 defines the standard interface dimensions for a terminated waveguide
optical circuit board (OCB) assembly (referred to simply as "assembly") using single-row thirty-
two-channel connectors for polymer waveguides connected with a symmetric PMT connector.
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 62496-1, Optical circuit boards – Part 1: General
IEC 62496-4, Optical circuit boards – Part 4: Interface standards – General and guidance
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 62496-1 and
IEC 62496-4 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
4 Description
The assembly is an assembly comprised of a symmetric PMT connector and a thirty-two-
channel waveguide OCB. The symmetric PMT connector is a rectangular connector having the
same outer dimensions as the type MT connector specified in IEC 61754-5. The symmetric PMT
connector is aligned using alignment pins and is normally secured by the use of a latching
spring and mates with the type MT connector as shown in Figure 1. Dimensions of components
for the assembly are shown in Annex A. The waveguide OCB comprises a planar light-guide
consisting of a core and cladding material appropriate to transmit light as the operational
wavelengths require, the light-guide being supported on a substrate. Preferably, the substrate
will be flexible in order to accommodate compliance to the MT connector. The cores of the
waveguide OCB are aligned with the optical fibres of the MT connector after mating using two
guide pins and a clamp spring. Dimensions of a single-row thirty-two-channel MT ferrule are
shown in Annex B. This symmetric PMT connector is not intermateable with the standard 16
channel MT ferrules.
– 6 – IEC 62496-4-214:2020 © IEC 2020

Figure 1 – Interconnection between the assembly and the MT connector
5 Interface dimensions of thirty-two-channel for the assembly, guide pins and
clamp spring
Figure 2 and Figure 3 and Table 1 show interface dimensions for the assembly. Table 2 shows
positions of the cores for the assembly. The origin point of the assembly is the midpoint of the
centres of two guide-holes. Figure 4 and Table 3 show the interface dimensions for a guide pin.
Figure 5 and Table 4 show the interface dimensions for a clamp spring.

Figure 2 – Interface dimensions of thirty-two-channel for the assembly

NOTE The X-axis is defined as the line connecting the two centres of two guide pin holes. The Y axis is defined as
the line orthogonal to the X axis intersecting the midpoint of the centres of the two guide pin holes. X shows the zero
point of the X-axis and Y shows the zero point of the Y-axis.
Figure 3 – Interface views of thirty-two-channel for the assembly
Table 1 – Interface dimensions of thirty-two-channel for the assembly
Dimensions
Reference mm
Minimum Maximum
AB 5,297 5,303
AC 6,300 6,500
AD 6,900 7,100
AE 2,400 2,500
AF 2,900 3,100
AG 7,900 8,100
AH 0,549 0,551
Table 2 – Positions of cores of thirty-two-channel for the assembly
Reference X Y Reference X Y
mm mm mm mm
a −1,937 5 0,000 q 0,062 5 0,000
b −1,812 5 0,000 r 0,187 5 0,000
c −1,687 5 0,000 s 0,312 5 0,000
d −1,562 5 0,000 t 0,437 5 0,000
e −1,437 5 0,000 u 0,562 5 0,000
f −1,312 5 0,000 v 0,687 5 0,000
g −1,187 5 0,000 w 0,812 5 0,000
h −1,062 5 0,000 x 0.937 5 0,000
i −0,937 5 0,000 y 1,062 5 0,000
j −0,812 5 0,000 z 1,187 5 0,000
k −0,687 5 0,000 aa 1,312 5 0,000
l −0,562 5 0,000 ab 1,437 5 0,000
m −0,437 5 0,000 ac 1,562 5 0,000
n −0,312 5 0,000 ad 1,687 5 0,000
o −0,187 5 0,000 ae 1,812 5 0,000
P −0,062 5 0,000 af 1,937 5 0,000

– 8 – IEC 62496-4-214:2020 © IEC 2020

Figure 4 – Interface views of the guide pin
Table 3 – Interface dimensions of the guide pin
Dimensions
References mm
Minimum Maximum
A 0,547 0,549
B 0,1 0,2
C 0,15 0,35
D 10,8 11,2
Figure 5 – Interface views of the clamp spring

Table 4 – Interface dimensions of the clamp spring
Dimensions
References mm
Minimum Maximum
a
14,8 15,2
M1
b
15,8 16,2
M2
JA 4,55 4,65
a
Length in free condition.
b
Compression force for clamping condition shall be 6,8 N to 12,8 N when

dimension M2 is between 15,8 mm and 16,2 mm.

– 10 – IEC 62496-4-214:2020 © IEC 2020

(informative)
Dimensions of an example of components for the assembly
A.1 Symmetric PMT connector
The example of a symmetric PMT connector is composed of a PMT body, a PMT cover and a
PMT boot, as shown in Figure A.1. The waveguide OCB is embedded and terminated between
the PMT body and the PMT cover.

Figure A.1 – An example of components of the symmetric PMT connector
Figure A.2 and Table A.1 show the dimensions of an example of the thirty-two-channel PMT
body.
Figure A.2 – Expanded view of end-face for an example of the single-row
thirty-two-channel PMT body
Table A.1 – Interface dimensions of an example of the single-row
thirty-two-channel for PMT body
Dimensions
Reference mm
Minimum Maximum
AI 4,000 4,003
AJ1
AJ2 0,047 0,053
AJ3
AK 1,875
a
0 0,003
AL
a
Gap of midpoint between two pin-hole centres and midpoint of trench.

A.2 Waveguide OCB
Figure A.3 shows the positions of the channel ports at the end-face of an example of the
waveguide OCB. The origin point of the waveguide OCB is located at the midpoint of the bottom
of the outline of the waveguide OCB, as shown in Figure A.3. Table A.2 gives dimensions of
the positions of the example of thirty-two channel ports.

– 12 – IEC 62496-4-214:2020 © IEC 2020

Figure A.3 – Positions of the example of thirty-two channel ports of OCB
Table A.2 – Positions of cores for an example of the thirty-two-channel ports of OCB
Reference X Y Reference X Y
mm mm mm mm
a −1,937 5 0,050 q 0,062 5 0,050
b −1,812 5 0,050 r 0,187 5 0,050
c −1,687 5 0,050 s 0,312 5 0,050
d −1,562 5 0,050 t 0,437 5 0,050
e −1,437 5 0,050 u 0,562 5 0,050
f −1,312 5 0,050 v 0,687 5 0,050
g −1,187 5 0,050 w 0,812 5 0,050
h −1,062 5 0,050 x 0.937 5 0,050
i −0,937 5 0,050 y 1,062 5 0,050
j −0,812 5 0,050 z 1,187 5 0,050
k −0,687 5 0,050 aa 1,312 5 0,050
l −0,562 5 0,050 ab 1,437 5 0,050
m −0,437 5 0,050 ac 1,562 5 0,050
n −0,312 5 0,050 ad 1,687 5 0,050
o −0,187 5 0,050 ae 1,812 5 0,050
p −0,062 5 0,050 af 1,937 5 0,050
w1 −2,000 0,050 w2 2,000 0,050
t1 0,100
(informative)
Di
...