IEC 61290-4-1:2016

IEC 61290-4-1 ®
Edition 2.0 2016-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Optical amplifiers – Test methods –
Part 4-1: Gain transient parameters – Two-wavelength method

Amplificateurs optiques – Méthodes d’essai –
Partie 4-1: Paramètres de gain transitoire – Méthode à deux longueurs d'onde

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IEC 61290-4-1 ®
Edition 2.0 2016-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Optical amplifiers – Test methods –

Part 4-1: Gain transient parameters – Two-wavelength method

Amplificateurs optiques – Méthodes d’essai –

Partie 4-1: Paramètres de gain transitoire – Méthode à deux longueurs d'onde

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.30 ISBN 978-2-8322-3659-8

– 2 – IEC 61290-4-1:2016 © IEC 2016
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references. 6
3 Terms, definitions and abbreviated terms . 6
3.1 Terms and definitions . 6
3.2 Abbreviated terms . 8
4 Measurement apparatus . 8
5 Test specimen . 11
6 Procedure . 11
7 Calculations . 12
8 Test results . 12
Annex A (informative) Background on transient phenomenon in optical amplifiers . 13
Annex B (informative) Slew rate effect on transient gain response . 16
B.1 The importance of rise time and fall time of input power . 16
B.2 Measured data and explanation . 16
Bibliography . 19

Figure 1 – Definitions of rise and fall times . 9
Figure 2 – OFA transient gain response . 10
Figure 3 – Generic transient control measurement setup. 11
Figure A.1 – OFA pump control for a chain of 5 OFAs and 4-fibre spans . 14
Figure A.2 – EDFA spectral hole depth for different gain compression . 15
Figure A.3 – EDFA spectral hole depth for different wavelengths . 15
Figure B.1 – Transient gain response at various slew rates . 17
Figure B.2 – 16 dB add and drop (rise and fall time = 10 µs) . 18
Figure B.3 – 16 dB add and drop (rise and fall time = 1 000 µs) . 18

Table 1 – Examples of add and drop scenarios for transient control measurement . 12
Table 2 – Typical results of transient control measurement . 12
Table B.1 – Transient gain response for various rise times and fall times (16 dB add or
drop) . 17

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL AMPLIFIERS –
TEST METHODS –
Part 4-1: Gain transient parameters –
Two-wavelength method
FOREWORD
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International Standard IEC 61290-4-1 has been prepared by subcommittee 86C: Fibre optic
systems and active devices, of IEC technical committee 86: Fibre optics.
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) extended the applicability from only EDFAs to all OFAs;
b) updated definitions for consistency with other documents in the IEC 61290-4 series.

– 4 – IEC 61290-4-1:2016 © IEC 2016
The text of this standard is based on the following documents:
CDV Report on voting
86C/1347/CDV 86C/1397/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 of the IEC 61290 series, published under the general title Opt
...