EN 61290-1-2:2005

SLOVENSKI SIST EN 61290-1-2:2006

STANDARD
marec 2006
Optični ojačevalniki – Preskusne metode – 1-2. del: Parametri moči in
ojačenja – Metoda z električnim spektralnim analizatorjem (IEC 61290-1-
2:2005)
Optical amplifiers - Test methods - Part 1-2: Power and gain parameters - Electrical
spectrum analyzer method (IEC 61290-1-2:2005)
ICS 33.180.30 Referenčna številka
©  Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

NORME CEI
INTERNATIONALE
IEC
61290-1-2
INTERNATIONAL
Deuxième édition
STANDARD
Second edition
2005-11
Amplificateurs optiques –
Méthodes d'essai –
Partie 1-2:
Paramètres de puissance et de gain –
Méthode de l'analyseur de spectre électrique

Optical amplifiers –
Test methods –
Part 1-2:
Power and gain parameters –
Electrical spectrum analyzer method

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61290-1-2  IEC:2005 – 3 –
CONTENTS
FOREWORD.5
INTRODUCTION.11

1 Scope.13
2 Normative references.15
3 Acronyms and abbreviations .15
4 Apparatus.15
5 Test sample.21
6 Procedure.21
7 Calculation .27
8 Test results .31

Bibliography .35

61290-1-2  IEC:2005 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL AMPLIFIERS – TEST METHODS –

Part 1-2: Power and gain parameters –
Electrical spectrum analyzer method

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
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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 61290-1-2 Ed. 2.0 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 1998. It constitutes a
technical revision. This second edition includes the measurement of gain parameters
previously covered in IEC 61290-2-1 Ed. 1.0. Also, the scope of the measurement method has
been broadened to include semiconductor optical amplifiers and waveguide optical amplifiers in
addition to optically-pumped fibre amplifiers.
This standard is to be read in conjunction with IEC 61291-1.

61290-1-2  IEC:2005 – 7 –
The text of this standard is based on the following documents:
FDIS Report on voting
86C/672/FDIS 86C/677/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.
IEC 61290 consists of the following parts under the general title Optical amplifiers – Test
1)
methods:
Part 1-1: Test methods for gain parameters – Optical spectrum analyzer
Part 1-2: Power and gain parameters – Electrical spectrum analyzer method
Part 1-3: Power and gain parameters – Optical power meter method
Part 2-1: Test methods for optical power parameters – Optical spectrum analyzer
Part 2-2: Test methods for optical power parameters – Electrical spectrum analyzer
Part 2-3: Test methods for optical power parameters – Optical power meter
Part 3: Test methods for noise figure parameters
Part 3-1: Noise figure parameters – Optical spectrum analyzer method
Part 3-2: Test methods for noise figure parameters – Electrical spectrum analyzer method
Part 5-1: Test methods for reflectance parameters – Optical spectrum analyser
Part 5-2: Reflectance parameters – Electrical spectrum analyser method
Part 5-3: Test methods for reflectance parameters – Reflectance tolerance using electrical
spectrum analyser
Part 6-1: Test methods for pump leakage parameters – Optical demultiplexer
Part 7-1: Test methods for out-of-band insertion losses – Filtered optical power meter
Part 10-1: Multi-channel parameters – Pulse method using an optical switch and optical
spectrum analyzer
Part 10-2: Multi-channel parameters – Pulse method using a gated optical spectrum
analyzer
Part 10-3: Multi-channel parameters – Probe methods
Part 11-1: Polarization mode dispersion – Jones matrix eigenanalysis method (JME)
Part 11-2 : Polarization mode dispersion parameter – Poincaré sphere analysis method
___________
1)
The first editions of some of these parts were published under the general title Optical fibre amplifiers – Basic
specification or Optical amplifier test methods.

61290-1-2  IEC:2005 – 9 –
The committee has decided that the contents of this publication will remain unchanged until the
maintenance result 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.
61290-1-2  IEC:2005 – 11 –
INTRODUCTION
This International Standard is devoted to the subject of optical amplifiers. The technology of
optical amplifiers is still rapidly evolving, hence amendments and new editions to this standard
can be expected.
Each abbreviation introduced in this International Standard is explained in the text at least the
first time it appears. However, for an easier understanding of the whole text, a list of all
abbreviations used in this International Standard is given in Clause 3.

61290-1-2  IEC:2005 – 13 –
OPTICAL AMPLIFIERS – TEST METHODS –

Part 1-2: Power and gain parameters –
Electrical spectrum analyzer method

1 Scope
This part of IEC 61290 applies to all commercially available optical amplifiers (OAs) and
optically amplified sub-systems. It applies to OAs using optically pumped fibres (OFAs based
on either rare-earth doped fibres or on the Raman effect), semiconductors (SOAs), and
waveguides (POWAs).
NOTE The applicability of the test methods described in the present standard to distributed Raman amplifiers is
for further study.
The object of this standard is to establish uniform requirements for accurate and reliable
measurements, by means of the electrical spectrum analyzer test method, of the following OA
parameters, as defined in Clause 3 of IEC 61291-1:
a) nominal output signal power
b) gain;
c) reverse gain;
d) maximum gain;
e) polarization-dependent gain;
f) large-signal output stability;
g) saturation output power;
h) maximum input signal power;
i) maximum output signal power;
j) input power range;
k) output power range;
l) maximum total output power.
In addition this test method provides a means for measuring the following parameters:
− maximum gain wavelength;
− gain wavelength band.
NOTE All numerical values followed by (‡) are suggested values for which the measurement is assured. Other
values may be acceptable, but should be verified.
The object of this standard is specifically directed to single-channel amplifiers. For
multichannel amplifiers, one should refer to the IEC 61290-10 series .
___________
See Bibliography.
61290-1-2  IEC:2005 – 15 –
2 Normative references
The following referenced documents are indispensable for the application 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 60793-1-40: Optical fibres – Part 1-40: Measurement methods and test procedures –
Attenuation
IEC 61291-1:2005 Optical amplifiers – Part 1: Generic specification
3 Acronyms and abbreviations
ASE amplified spontaneous emission
DBR distributed Bragg reflector (laser diode)
DFB distributed feedback (laser diode)
ECL external cavity laser (diode)
LED light emitting diode
OA optical amplifier
OFA optical fibre amplifier
POWA planar optical waveguide amplifier
SOA semiconductor optical amplifier
4 Apparatus
A diagram of the measurement set-up is given in Figure 1.
___________
A first edition of IEC 61291-1 was published in 1998 under the title Optical fibre amplifiers – Part 1: Generic
specification.
61290-1-2  IEC:2005 – 17 –
Optical
coupler
J1
Optical
Optical Polarisation
dB
power
source
controller
meter
Variable
optical
attenuator
Optical
Signal
power
generator
meter
IEC  1610/05
a) Average optical input signal power
Optical
coupler
J1 J2
Optical Polarisation Optical
dB
source controller detector
Variable
optical
attenuator
Optical
Electrical
Signal
power
spectrum
generator
meter
analyzer
IEC  1611/05
b) Electrical input signal power
Optical
coupler
J1
J2
Optical
Polarisation Optical
dB OA
source
detector
controller
Variable
optical OA
under test
attenuator
Optical
Signal
Electrical
power
generator
spectrum
meter
analyzer
IEC  1612/05
c) Electrical output signal power

Figure 1 – Typical arrangement of the electrical spectrum analyzer test apparatus for
measurement of (a) average optical input signal power, (b) electrical input signal power
and (c) electrical output signal power.

61290-1-2  IEC:2005 – 19 –
The test equipment listed below, with the required characteristics, is needed.
a) Optical source: The optical source shall be either at fixed wavelength or wavelength-tunable.
– Fixed-wavelength optical source: This optical source shall generate a light with a
wavelength and optical power specified in the relevant detail specification. Unless
otherwise specified, the optical source s
...