IEC 62149-12:2023

IEC 62149-12
®

Edition 1.0 2023-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE


Fibre optic active components and devices – Performance standards –
Part 12: Distributed feedback laser diode device for analogue radio over fibre
systems

Composants et dispositifs actifs fibroniques – Normes de performances –
Partie 12: Dispositif à diode laser à rétroaction répartie pour systèmes radio
analogiques sur fibre

IEC 62149-12:2023-02(en-fr)

---------------------- Page: 1 ----------------------
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IEC 62149-12

®


Edition 1.0 2023-02




INTERNATIONAL



STANDARD




NORME


INTERNATIONALE











Fibre optic active components and devices – Performance standards –

Part 12: Distributed feedback laser diode device for analogue radio over fibre

systems



Composants et dispositifs actifs fibroniques – Normes de performances –

Partie 12: Dispositif à diode laser à rétroaction répartie pour systèmes radio


analogiques sur fibre













INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 33.180.20 ISBN 978-2-8322-6473-7




Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

---------------------- Page: 3 ----------------------
– 2 – IEC 62149-12:2023 © IEC 2023
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms, definitions, symbols and abbreviated terms . 7
3.1 Terms and definitions . 7
3.2 Symbols . 7
3.3 Abbreviated terms . 8
4 Product parameters . 8
4.1 Absolute limiting ratings . 8
4.2 Operating environment . 8
4.3 Functional specifications . 8
5 Testing . 9
5.1 General . 9
5.2 Characterization testing . 9
5.3 Performance testing . 9
6 Environmental specifications . 9
6.1 General safety . 9
6.2 Laser safety . 9
6.3 Electromagnetic compatibility (EMC) requirements. 9
Annex A (normative) Specifications for DFB-LD devices for analogue RoF systems . 10
A.1 Absolute limiting ratings . 10
A.2 Operating environment . 10
A.3 Functional specifications . 10
A.4 Testing . 11
A.4.1 Characterization testing . 11
A.4.2 Performance testing. 11
Bibliography . 14

Table 1 – Operating case environment . 8
Table A.1 – Absolute limiting ratings . 10
Table A.2 – Operating conditions for functional specifications . 10
Table A.3 – Functional specifications . 11
Table A.4 – Performance test plan . 12
Table A.5 – Recommended performance test failure criteria . 13

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IEC 62149-12:2023 © IEC 2023 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

FIBRE OPTIC ACTIVE COMPONENTS AND DEVICES –
PERFORMANCE STANDARDS –

Part 12: Distributed feedback laser diode device
for analogue radio over fibre 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
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4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
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any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
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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
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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.
IEC 62149-12 has been prepared by subcommittee 86C: Fibre optic systems and active devices,
of IEC technical committee 86: Fibre optics. It is an International Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
86C/1808/CDV 86C/1840/RVC

Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.

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– 4 – IEC 62149-12:2023 © IEC 2023
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
A list of all parts of the IEC 62149 series, published under the general title Fibre optic active
components and devices – Performance standards, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under 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.

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IEC 62149-12:2023 © IEC 2023 – 5 –
INTRODUCTION
Distributed feedback laser diode (DFB-LD) devices for analogue radio over fibre (A-RoF)
systems are used to convert electrical radio signals into optical signals. This document covers
the performance specification for DFB-LD devices in A-RoF systems. The optical and electrical
performance criteria are generally well specified for a number of internationally agreed upon
application areas, such as ITU-T Recommendation G.9803 and IEC 62149-10. This document
provides optical and electrical performance specifications for RoF transceivers. These
transceivers are necessary for operation of A-RoF systems, because the RoF transmitter
requires a light source such as a DFB-LD device. DFB-LD devices for RoF transceivers are
supplied by different manufacturers. However, they do not guarantee the operation of DFB-LD
devices in A-RoF systems. Manufacturers using this document are responsible for meeting the
required performance and/or reliability and quality assurance under a recognized scheme.

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– 6 – IEC 62149-12:2023 © IEC 2023
FIBRE OPTIC ACTIVE COMPONENTS AND DEVICES –
PERFORMANCE STANDARDS –

Part 12: Distributed feedback laser diode device
for analogue radio over fibre systems



1 Scope
This part of IEC 62149 defines performance specifications for distributed feedback laser diode
(DFB-LD) devices used in analogue radio over fibre (RoF) systems. It defines product
performance requirements together with a series of tests and measurements with clearly
defined conditions, severities, and pass/fail criteria. The tests are intended to be run on a "once-
off" basis to prove a product’s ability to satisfy the performance requirements.
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 60749-6, Semiconductor devices – Mechanical and climatic test methods – Part 6: Storage
at high temperature
IEC 60749-7, Semiconductor devices – Mechanical and climatic test methods – Part 7: Internal
moisture content measurement and the analysis of other residual gases
IEC 60749-10, Semiconductor devices – Mechanical and climatic test methods – Part 10:
Mechanical shock – Device and subassembly
IEC 60749-11, Semiconductor devices – Mechanical and climatic test methods – Part 11: Rapid
change of temperature – Two-fluid-bath method
IEC 60749-12, Semiconductor devices – Mechanical and climatic test methods – Part 12:
Vibration, variable frequency
IEC 60749-25, Semiconductor devices – Mechanical and climatic test methods – Part 25:
Temperature cycling
IEC 60749-26, Semiconductor devices – Mechanical and climatic test methods – Part 26:
Electrostatic discharge (ESD) sensitivity testing – Human body model (HBM)
IEC 60825-1, Safety of laser products – Part 1: Equipment classification and requirements
IEC 60950-1, Information technology equipment – Safety – Part 1: General requirements
IEC 61300-2-4, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 2-4: Tests – Fibre or cable retention
IEC 61300-2-19, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 2-19: Tests – Damp heat (steady state)

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IEC 62149-12:2023 © IEC 2023 – 7 –
IEC 61300-2-48, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 2-48: Tests – Temperature-humidity cycling
IEC 62149-1, Fibre optic active components and devices – Performance standards – Part 1:
General and guidance
3 Terms, definitions, symbols and abbreviated terms
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 62149-1 and the
following apply.
ISO and IEC maintain terminology databases for use in standardization at the following
addresses:
• IEC Electropedia: available at https://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
3.1.1
relative intensity noise
RIN
instability in the power level of a laser output power, which is the noise
normalized to the average power level
3.1.2
third order inter-modulation distortion
IMD3
amplitude modulation of signals containing two or more different frequencies,
caused by nonlinearities or time variance in a system
Note 1 to entry: Each individual signal frequency, including original signals at frequencies f and f and the second-
1 2
order intermodulation products at f + f , |f – f |, 2f and 2f , will add to and subtract from other frequency
1 2 2 1 1 2
components to give rise to more signal components.
Note 2 to entry: The two intermodulation products at frequencies |2f – f | and |2f – f | in particular can be
1 2 2 1
troublesome and can cause interference, as their frequencies are close to the frequencies of the original signals.
3.2 Symbols
E tracking error
r
I dark current
d
I forward current
f
I forward current for photodiode
fd
I monitor current
m
I operating current
op
I threshold current
th
I reverse current for photodiode
rl
P optical output power
f
P optical output power at threshold current
th
 side mode suppression ratio
S
r
T operating case temperature
c

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– 8 – IEC 62149-12:2023 © IEC 2023
T storage temperature
stg
V operating voltage
op
V reverse voltage for photodiode
rd
V reverse voltage for laser diode
rl
η slope efficiency

Δη delta slope efficiency

λ light-emission central wavelength
c
λ wavelength temperature coefficient
ct
3.3 Abbreviated terms
APC automatic power control
A-RoF analogue radio over fibre
CW continuous wave
CWDM coarse wavelength division multiplexing
DFB-LD distributed feedback laser diode
DS data sheet
LSL lower specification limit
OMI optical modulation index
RH relative humidity
RoF radio over fibre
USL upper specification limit
4 Product parameters
4.1 Absolute limiting ratings
Absolute limiting (maximum and/or minimum) ratings imply that no catastrophic damage
will occur if the product is subject to these ratings for short periods of time, provided each
limiting parameter is in isolation and all other parameters have values within the normal
performance parameters. It should not be assumed that the limiting value of more than one
parameter can be applied at any one time. The absolute limiting ratings are listed in Table A.1.
4.2 Operating environment
The operating environment of DFB-LD devices for A-RoF systems is specified in Table 1.
Table 1 – Operating case environment
Value
Parameter Symbol Unit
Minimum Maximum
T
Operating case temperature –20 +60 °C
c

4.3 Functional specifications
The functional specifications and operating conditions for DFB-LD devices for A-RoF systems
are provided in Clause A.3.

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IEC 62149-12:2023 © IEC 2023 – 9 –
5 Testing
5.1 General
Clause 5 defines the characterization and performance testing as well as some important test
conditions. The detailed test parameters, test conditions, test plans, and test failure criteria are
specified in Annex A.
Initial characterization and qualification shall be undertaken when a build standard has been
completed and finalized. Qualification maintenance is carried using periodic testing programs.
Test conditions for all tests are 25 °C ± 2 °C unless otherwise stated.
5.2 Characterization testing
Characterization shall be carried out on at least 20 products taken from at least three different
manufacturing lots. The characteristics and conditions of DFB-LD devices for A-RoF systems
are tested at the operating case temperature listed in Table A.2 and the operating conditions
listed in Table A.3 to satisfy the functional specifications defined in Clause A.3.
5.3 Performance testing
Performance testing is undertaken when characterization testing is complete. The performance
test plan and recommended performance test failure criteria are specified in Clause A.4.
6 Environmental specifications
6.1 General safety
All products meeting this document shall conform to IEC 60950-1.
6.2 Laser safety
Fibre optic active devices including the DFB-LD specified in this document shall be class 3R
laser certified under any condition of operation. This includes single fault conditions whether
coupled into a fibre or out of an open bore. DFB-LD device specified in this document shall be
certified to be in conformance with IEC 60825-1.
Laser safety standards and regulations usually require that the manufacturer of a laser product
provide information about the product’s laser, safety features, labelling, use, maintenance and
service. This documentation defines requirements and usage restrictions on the host system
necessary to meet these safety certifications.
6.3 Electromagnetic compatibility (EMC) requirements
Products defined in this document shall comply with suitable requirements for electromagnetic
compatibility (in terms of emission and immunity), depending on the particular usage or
environment in which they are intended to be installed or integrated. Guidance on the drafting
of such EMC requirements is provided in IEC Guide 107.

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– 10 – IEC 62149-12:2023 © IEC 2023
Annex A
(normative)

Specifications for DFB-LD devices for analogue RoF systems
A.1 Absolute limiting ratings
Absolute limiting (maximum and/or minimum) ratings imply that no catastrophic damage
will occur if the product is subject to these ratings for short periods of time, provided each
limiting parameter is in isolation and all other parameters have values within the normal
performance parameters. It should not be assumed that the limiting rating values of more than
one parameter can be applied at any one time.
Table A.1 – Absolute limiting ratings
Parameter Symbol Conditions Minimum Maximum Unit
P CW
Optical output power from fibre end - 10 mW
f
Laser
I CW
Forward current - 150 mA
f
diode
V
-
Reverse voltage - 2 V
rl
I -
Forward current - 2 mA
fd
Photodiode
V -
Reverse voltage - 20 V
rd
Operating case temperature T -
–20 60
°C
c
Storage temperature T
-
–40 85 °C
stg

A.2 Operating environment
The requirements of 4.2 shall be met.
A.3 Functional specifications
Table A.2 and Table A.3 list the operating conditions and functional specifications for DFB-LD
devices with a monitor photodiode.
Table A.2 – Operating conditions for functional specifications
Parameter Symbol Value Unit
T
Operating case temperature 25 °C
c

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IEC 62149-12:2023 © IEC 2023 – 11 –
Table A.3 – Functional specifications
Limits
Parameter Symbol Test condition Unit
Minimum Typical Maximum

I
Threshold current CW - 8 15 mA
th
Optical output power at threshold
P CW, I = I
- - 100 μW
th bias th
current
I CW, P = 4 mW
Operating current - - 60 mA
op f
V CW, P = 4 mW
Operating voltage - 1,2 1,6 V
op f
CW, P = 4 mW
Slope efficiency η 0,08 0,13 0,23 W/A
f
CW, P = 4 mW,
f
Delta slope efficiency Δη 40 60 - %
T = 60 °C
c
Light-emission current
a
λ λ − 5 λ λ + 5
nm
CW, APC
b c c c c
wavelength
Wavelength temperature
λ
CW, APC - 0,1 0,11 nm/°C
ct
coefficient
S
Side mode suppression ratio CW, APC 30 45 - dB
r
c
E
Tracking error CW, APC 0.5 - 1,25 dB
r
= 4 mW,
CW, P
f
I
Monitor current 0,1 - 1,5 mA
m
V = 5 V
rd

I V = 5 V
Dark current - - 0,1 μA
d
rd
CW, APC,
Relative intensity noise (RIN) - –165 - –145 dB/Hz
f = 4 900 MHz
Two-tone test
f = 4 900 MHz,
1
Third order inter-modulation
f = 5 000 MHz,
- - - –60 dBc
2
distortion (IMD3)
d
OMI 20 % ,
P = 4 mW
f
a
 APC (automatic power control) refers to operating the laser diode in such a way that the monitor photodiode
current is constant for P = 4 mW at T = 25 °C.
f c
b
 CWDM wavelength (ITU Recommendation G.694.2).
c

 E max 10 log PT PT 25°C
( ) ( )
r fc fc

d
 Optical modulation index.

A.4 Testing
A.4.1 Characterization testing
The requirements of 5.1 and 5.2 shall be met.
A.4.2 Performance testing
Performance testing is undertaken when characterization testing is complete. A performance
test plan is shown in Table A.4. The recommended performance test failure criteria are listed
in Table A.5.
= =

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– 12 – IEC 62149-12:2023 © IEC 2023
Table A.4 – Performance test plan
Number
No. Test Reference Conditions of
samples
1 Endurance test of:
1.1 Package
1.1.1 High temperature IEC 60749-6 Temperature: T = T 11
stg max
storage
Duration: 1 000 h
1.1.2 Low temperature Temperature: T = T 11
stg min
storage
Duration: > 2 000 h
Temperature Temperature: T = T
1.1.3 IEC 60749-25 11
A stg min
cycling
T = T

B stg max
Number of cycles = 100
1.1.4 Damp heat IEC 61300-2-19 11
T = +40 °C ± 2 °C
+2
RH: 93 %
−3
96 h duration
1.1.5 Temperature- IEC 61300-2-48, method A –40 °C ± 2 °C to +85 °C ± 2 °C 11
85 % ± 5 % RH at the maximum
humidity cycling

temperature
1 h minimum duration at
extremes
≥ 1 °C/min rate of change
42 cycles
a
1.1.6 IEC 61300-2-4 Force: 5 N ± 0,5 N 11
Fibre pull
Rate of force to 5 N: 0,5 N/s


60 s duration for buffered fibres
b
1.2 Laser diode Temperature: at least two test
(submount) temperatures:
φ specified, constant power
e
T = T
s1 s max
T ≤ (T − 20 °C)
s2 s1
Duration: > 5 000 h
b
1.3 Photodiode (in Temperature: at least two test
representative temperatures:
package) V or I specified
rl rl
T = 125 °C min
s1
T ≤ (T − 30 °C)
s2 s1
Duration: > 1 000 h
c
2 Mechanical shock IEC 60749-10 1 500 g, 0,5 ms
11
5 times/axis
c
3 Vibration IEC 60749-12 20 g, 20 Hz to 2 000 Hz,
11
4 min/cycle, 4 cycle/axis
4 Rapid change of IEC 60749-11 ΔT = 100 °C 11
temperature
Temperature change time < 10 s,
dwell time >
...