IEC PAS 62593:2008
(Main)Measurement method of a half-wavelength voltage for Mach-Zehnder optical modulators in wireless communication and broadcasting systems
Measurement method of a half-wavelength voltage for Mach-Zehnder optical modulators in wireless communication and broadcasting systems
IEC/PAS 62593:2008(E) gives a measurement method of half-wavelength voltage applicable to Mach-Zehnder optical modulators in wireless communication and broadcasting systems. In addition, this method is also effective for the estimation of the intermodulation distortion of Mach-Zehnder optical modulators.
- Frequency range: 10 MHz to 30 GHz.
- Wavelength band: 0,8 µm, 1,0 µm, 1,3 µm and 1,5 µm.
- Electro-optic material based Mach-Zehnder optical modulators and their modules.
General Information
Standards Content (Sample)
IEC/PAS 62593
Edition 1.0 2008-11
PUBLICLY AVAILABLE
SPECIFICATION
PRE-STANDARD
Measurement method of a half-wavelength voltage for Mach-Zehnder optical
modulators in wireless communication and broadcasting systems
IEC/PAS 62593:2008(E)
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 your local IEC member National Committee for further information.
IEC Central Office
3, rue de Varembé
CH-1211 Geneva 20
Switzerland
Email: inmail@iec.ch
Web: www.iec.ch
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 corrigenda or an amendment might have been published.
ƒ Catalogue of IEC publications: www.iec.ch/searchpub
The IEC on-line Catalogue enables you to search by a variety of criteria (reference number, text, technical committee,…).
It also gives information on projects, withdrawn and replaced publications.
ƒ IEC Just Published: www.iec.ch/online_news/justpub
Stay up to date on all new IEC publications. Just Published details twice a month all new publications released. Available
on-line and also by email.
ƒ Electropedia: www.electropedia.org
The world's leading online dictionary of electronic and electrical terms containing more than 20 000 terms and definitions
in English and French, with equivalent terms in additional languages. Also known as the International Electrotechnical
Vocabulary online.
ƒ Customer Service Centre: www.iec.ch/webstore/custserv
If you wish to give us your feedback on this publication or need further assistance, please visit the Customer Service
Centre FAQ or contact us:
Email: csc@iec.ch
Tel.: +41 22 919 02 11
Fax: +41 22 919 03 00
IEC/PAS 62593
Edition 1.0 2008-11
PUBLICLY AVAILABLE
SPECIFICATION
PRE-STANDARD
Measurement method of a half-wavelength voltage for Mach-Zehnder optical
modulators in wireless communication and broadcasting systems
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
V
ICS 33.060.20 ISBN 978-2-88910-812-1
– 2 – PAS 62593 © IEC:2008(E)
CONTENTS
FOREWORD.4
INTRODUCTION.5
1 Scope.6
2 Normative references .6
3 Terms, definitions and acronyms .6
3.1 Terms and definitions .6
4 Electro-optic material based Mach-Zehnder optical modulator .8
4.1 Type.8
4.2 Structure .8
4.3 Requirements for Mach-Zehnder optical modulators .8
5 Sampling .9
5.1 Sampling .9
5.2 Sampling frequency.9
6 Measurement method of half wavelength voltage.9
6.1 Circuit diagram.9
6.2 Circuit description and requirement .9
6.3 Measurement condition .10
6.4 Principle of measurement method .10
6.5 Measurement procedure.13
Annex A (normative) Conventional Measurement method of Optical Modulation Index .17
Annex B (informative) Calculation method of intermodulation distortions from driving
voltages and half-wavelength voltage for Mach-Zehnder optical modulator .19
Annex C (informative) Characteristics of Mach-Zehnder optical modulator .27
Annex D (informative) Points to consider for measurement .29
Bibliography.35
Figure 1 – A transfer curve of a Mach-Zehnder optical modulator .7
Figure 2 .8
Figure 3 – Circuit diagram.9
Figure 4 .11
Figure 5 – The schematic block diagram of the measurement setup.12
Figure 6 – Driving voltage measurement setup .14
Figure 7 .15
Figure 8 a) – The amplitude of the optical signal is almost zero .16
Figure 8 b) – The optical signal is modulated in phase with S2 element .16
Figure 8 c) – The optical signal is modulated in opposite phase with S2 element .16
Figure A.1.17
Figure A.2.18
Figure B.1 Mach-Zehnder interferometer type optical modulator .19
Figure B.2 – Quadrature points of a transfer cureve for a Mach-Zehnder optical
modulator .23
PAS 62593 © IEC:2008(E) – 3 –
Figure B.2 – Dependency of IM2 on NOMI and Bias voltage of a Mach-Zehnder optical
modulator .24
Figure B.4 – Relation between IM3 and OMI of a Mach-Zehnder optical modulator .24
Figure B.5.25
Figure B.6 – IMD2 and IMD3.26
Figure D.1 – Errors of half-wavelength voltage measurements caused by limitations
from the resolution of RF power supply.31
Figure D.2 – Relative errors of half-wavelength voltage measurement caused by
limitations from the resolution of RF power .32
Figure D.3 – Relation between NOMI and IM3 for the Mach-Zehnder modulator
(sample #1) .33
Figure D.4 – Relation between NOMI and IM3 for the Mach-Zehnder modulator
(sample #2) .33
Figure D.5 – Relation between NOMI and IM2 for the Mach-Zehnder modulator
(sample #1) .34
Table 1 – Acronyms .7
Table C.1.27
Table C.2.28
Table D.1.29
Table D.2 – Measurement results of half-wave voltages for Mach-Zehnder modulators.32
– 4 – PAS 62593 © IEC:2008(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MEASUREMENT METHOD OF A HALF-WAVELENGTH VOLTAGE
FOR MACH-ZEHNDER OPTICAL MODULATORS IN WIRELESS
COMMUNICATION AND BROADCASTING SYSTEMS
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 provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
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.
A PAS is a technical specification not fulfilling the requirements for a standard, but made
available to the public.
IEC-PAS 62593 has been processed by IEC technical committee 103: Transmitting equipment
for radio communication.
The text of this PAS is based on the This PAS was approved for
following document: publication by the P-members of the
committee concerned as indicated in
the following document
Draft PAS Report on voting
103/74/PAS 103/81/RVD
Following publication of this PAS, which is a pre-standard publication, the technical committee
or subcommittee concerned may transform it into an International Standard.
This PAS shall remain valid for an initial maximum period of 3 years starting from the
publication date. The validity may be extended for a single 3-year period, following which it
shall be revised to become another type of normative document, or shall be withdrawn.
PAS 62593 © IEC:2008(E) – 5 –
INTRODUCTION
A variety of microwave-photonic devices are used in wireless communication and
broadcasting systems. An optical modulator is an interface which converts an electronic signal
into an optical signal. In the field of optical fibre communication systems, the IEC 62007
series "Semiconductor optoelectronic devices for fibre optic system applications" has been
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.