I n t e r n a t i o n a l T e l e c o m m u n i c a t i o n U n i o n
SERIES G: TRANSMISSION SYSTEMS AND MEDIA,
DIGITAL SYSTEMS AND NETWORKS
Transmission media and optical systems characteristics –
Optical fibre cables
Characteristics of a single-mode optical fibre
Recommendation ITU-T G.652
ITU-T G-SERIES RECOMMENDATIONS
TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS
INTERNATIONAL TELEPHONE CONNECTIONS AND CIRCUITS
GENERAL CHARACTERISTICS COMMON TO ALL ANALOGUE CARRIER-
INDIVIDUAL CHARACTERISTICS OF INTERNATIONAL CARRIER TELEPHONE
SYSTEMS ON METALLIC LINES
GENERAL CHARACTERISTICS OF INTERNATIONAL CARRIER TELEPHONE SYSTEMS
ON RADIO-RELAY OR SATELLITE LINKS AND INTERCONNECTION WITH METALLIC
COORDINATION OF RADIOTELEPHONY AND LINE TELEPHONY
TRANSMISSION MEDIA AND OPTICAL SYSTEMS CHARACTERISTICS
Symmetric cable pairs
Land coaxial cable pairs
Free space optical systems
Optical fibre cables
Characteristics of optical components and subsystems
Characteristics of optical systems
DIGITAL TERMINAL EQUIPMENTS
DIGITAL SECTIONS AND DIGITAL LINE SYSTEM
MULTIMEDIA QUALITY OF SERVICE AND PERFORMANCE – GENERIC AND USER-
TRANSMISSION MEDIA CHARACTERISTICS
DATA OVER TRANSPORT – GENERIC ASPECTS
PACKET OVER TRANSPORT ASPECTS
For further details, please refer to the list of ITU-T Recommendations.
Rec. ITU-T G.652 (11/2016) i
Recommendation ITU-T G.652
Characteristics of a single-mode optical fibre and cable
Recommendation ITU-T G.652 describes the geometrical, mechanical and transmission attributes of
a single-mode optical fibre and cable which has zero-dispersion wavelength around 1310 nm. The
ITU-T G.652 fibre was originally optimized for use in the 1310 nm wavelength region, but can also
be used in the 1550 nm region. This is the latest revision of a Recommendation that was first created
in 1984 and deals with some relatively minor modifications. This revision is intended to maintain the
continuing commercial success of this fibre in the evolving world of high-performance optical
Table 1 "G.652.A attributes" and Table 3 "G.652.C attributes" of the 2009 edition have not been
changed and are not incorporated in this 2016 edition. These tables are still available in the
2009 edition of ITU-T G.652 Recommendation. These optical fibres and cables can be used for
systems with less stringent polarization mode dispersion (PMD) requirements (e.g., systems with
short link lengths or those with high PMD tolerance).
Table 2 "G.652.B attributes" and Table 4 "G.652.D attributes" of the 2009 edition have been
maintained with revisions in this 2016 edition, renumbered to Table 1 "G.652.B attributes" and
Table 2 "G.652.D attributes".
This revision includes the addition of tables for different levels of
system support. 11.1002/1000/5183
This revision clarified the nomenclature for the different
categories or fibre. Also, in accordance with the agreement on
spectral band description, the upper limit of the L-band is
changed from 16XX to 1625 nm. The attenuation characteristics
for reduced water peak categories, (G.652.C and G.652.D) are
generalized to a broad region from a single wavelength. PMD
requirements are added for all categories and two categories have
reduced limits (compared to 0.5 ps/
). For the macrobending
test, mandrel diameter is reduced to 30 mm radius. As seen
above, this Recommendation has evolved considerably over the
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ii Rec. ITU-T G.652 (11/2016)
years; therefore the reader is warned to consider the appropriate
version to determine the characteristics of already deployed
product, taking into account the year of production. In fact,
products are expected to comply with the Recommendation that
was in force at the time of their manufacture, but may not fully
comply with subsequent versions of the Recommendation.
Support of G.695 applications is noted.
A clarification of the method of fitting chromatic dispersion
coefficient values and their use is provided in 5.10, along with
some text on use of the statistics of chromatic dispersion for
A clarification of the relationship of the PMD
of uncabled fibre
to cabled fibre is provided in 6.2.
In the tables of requirements:
The uncabled fibre PMD line item is removed from the tables and
the note on the requirement for uncabled fibre PMD is modified.
The tolerance of MFD at 1310 nm is reduced.
The maximum dispersion slope at the zero dispersion wavelength
The maximum concentricity error is reduced.
The maximum macrobending loss is reduced.
The wording for the water peak requirement in Tables 3 and 4 are
modified to reflect a reference to the specification over the range
vs the specification at 1310 nm.
Add IEC-60794-2-11 as an informative reference in clause 2.2.
Editorial correction at start of clause 6.2 (PMD).
New note has been introduced in Table 1 – 4 allowing higher
maximum cabled attenuation (1.0 dB/km) for short indoor cables.
Modification in Tables 3 and 4 to the cabled attenuation at 1383
nm (max. 0.40 dB/km).
New text has been introduced in Tables 3 and 4 concerning
hydrogen ageing (note 3).
Tables 1 and 3 of edition 8 have not been changed. These tables
are not included in this version of Recommendation ITU-T
G.652, but are in the 2009 edition.
The tables in this edition have been renumbered. Tables 1 and 2
of this edition 9 correspond respectively to Tables 2 and 4 of
New clause 5 “Conventions” has been added. Following clause
numbers have been renumbered.
Chromatic dispersion specification for G.652.D fibres has been
changed into boundary line specification.
In clause 6.10 the text concerning chromatic dispersion for
G.652.D fibres has been modified.
In clause 7.2 (PMD) a note has been added about usability of high
PMD fibre and cable for systems with less stringent PMD
In clause 8 only Table 1 (G.652.B) and Table 2 (G.652.D) are
indicated. Here also a reference to IEC fibre designations is
In Table 1 (G.652.B) and Table 2 (G.652.D) Note 1 has been
extended with text concerning attenuation coefficient at a
wavelength longer than 1625 nm.
Rec. ITU-T G.652 (11/2016) iii
In Table 1 (G.652.B) new Note 3 and Table 2 (G.652.D) new
Note 5 describe usability of high PMD fibre and cable for system
with less stringent PMD requirements.
In Table 2 (G.652.D) the nominal mode field diameter upper
range has been reduced.
In Table 2 (G.652.D) the mode field diameter tolerance has been
In Table 2 (G.652.D) the cladding diameter tolerance has been
In Table 2 (G.652.D) new specification has been introduced for
In Table 2 (G.652.D) text has been added and renewed
concerning attenuation coefficient at 1383 nm.
In Table 2 (G.652.D) the attenuation specifications have been
edited to two decimal places.
Added in Appendix I a new clause I.6 “An example of statistical
New Appendix II has been added highlighting the data collection
on maximum and minimum chromatic dispersion over
wavelength range 1270 nm to 1625 nm for the boundary line
specification of G.652.D fibres
Dispersion un-shifted optical fibre, optical fibre and cable, single-mode optical fibre.
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