IEC 61978-1:2014

IEC 61978-1 ®
Edition 3.0 2014-05
INTERNATIONAL
STANDARD
colour
inside
Fibre optic interconnecting devices and passive components – Fibre optic
passive chromatic dispersion compensators –
Part 1: Generic specification
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IEC 61978-1 ®
Edition 3.0 2014-05
INTERNATIONAL
STANDARD
colour
inside
Fibre optic interconnecting devices and passive components – Fibre optic

passive chromatic dispersion compensators –

Part 1: Generic specification
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
U
ICS 33.180.01 ISBN 978-2-8322-1583-8

– 2 – IEC 61978-1:2014 © IEC 2014

CONTENTS
FOREWORD . 4

1 Scope . 6

2 Normative references . 6

3 Terms and definitions . 7

3.1 Basic terms . 7

3.2 Component terms . 7

3.3 Performance parameter . 8
4 Requirements . 10
4.1 General . 10
4.2 Classification . 10
4.2.1 General . 10
4.2.2 Type . 10
4.2.3 Style . 11
4.2.4 Variant . 12
4.2.5 Normative reference extensions . 12
4.3 Documentation . 13
4.3.1 Symbols . 13
4.3.2 Specification system . 13
4.3.3 Drawings . 14
4.3.4 Tests and measurements . 15
4.3.5 Test data sheets . 15
4.3.6 Instructions for use . 15
4.4 Standardization system . 15
4.4.1 Performance standards . 15
4.4.2 Reliability standards . 16
4.4.3 Interlinking . 16
4.5 Design and construction. 18
4.5.1 Materials . 18
4.5.2 Workmanship . 18
4.6 Performance . 18
4.7 Identification and marking . 18
4.7.1 General . 18

4.7.2 Variant identification number . 18
4.7.3 Component marking . 19
4.7.4 Package marking . 19
4.8 Packaging . 19
4.9 Storage conditions . 20
4.10 Safety . 20
Annex A (informative) Example of dispersion compensating fibre (DCF) technologies . 21
Annex B (informative) Example of fibre Bragg grating (FBG) technologies . 23
Annex C (informative) Example of virtually imaged phased array (VIPA) technologies . 25
Annex D (informative) Example of GT etalon technologies . 27
Annex E (informative) Technology dependent characteristics of PCDCs . 28
Bibliography . 29

Figure 1 – Standards currently under preparation . 17

Figure A.1 – Chromatic dispersion in a standard single-mode optical fibre (SMF) . 21

Figure A.2 – Calculated contour for different dispersion at the wavelength of 1,55 µm

(CD(λ:1,55 µm)) for a step index core fibre . 22

Figure A.3 – Examples of refractive index profile used in DCF . 22

Figure B.1 – Illustration of the use of a chirped fibre Bragg grating for chromatic

dispersion compensation . 23

Figure B.2 – Expanded view over 10 nm of the insertion loss spectrum of a multi-
channel FBG . 24

Figure C.1 – Structure of virtually imaged phased array (VIPA) . 25
Figure C.2 – Detailed light path and mechanism of generating chromatic dispersion . 26
Figure D.1 – Gires-Tournois etalon . 27

Table 1 – Types of passive chromatic dispersion compensators . 11
Table 2 – Three-level IEC specification structure . 13
Table 3 – Standards interlink matrix . 17
Table 4 – Quality assurance options . 18
Table E.1 – Summary of technology dependent characteristics of PCDCs . 28

– 4 – IEC 61978-1:2014 © IEC 2014

INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
FIBRE OPTIC INTERCONNECTING DEVICES

AND PASSIVE COMPONENTS – FIBRE OPTIC PASSIVE

CHROMATIC DISPERSION COMPENSATORS –

Part 1: Generic specification
FOREWORD
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International Standard IEC 61978-1 has been prepared by subcommittee 86B: Fibre optic
interconnecting devices and pass
...