EN 61281-1:1999
(Main)Fibre optic communication subsystems - Part 1: Generic specification
Fibre optic communication subsystems - Part 1: Generic specification
The parameters defined herein form a specifiable minimum set of specifications that are common to all fibre optic subsystems. Additional parameters may be needed depending on the particular application and technology. Those additional parameters will be specified in the relevant sectional specification and/or detail specification, as appropriate
Lichtwellenleiter-Kommunikationsuntersysteme - Teil 1: Fachgrundspezifikation
Sous-systèmes de télécommunications par fibres optiques - Partie 1: Spécification générique
Les paramètres définis dans la présente norme forment un ensemble minimal de spécifications communes à tous les sous-systèmes à fibres optiques. Il est possible que des paramètres complémentaires soient nécessaires, selon les applications particulières et la technologie. Ces paramètres complémentaires seront spécifiés dans la spécification intermédiaire et/ou dans la spécification particulière applicable, selon le cas.
Fibre optic communication subsystems - Part 1: Generic specification (IEC 61281-1:1999)
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Standards Content (Sample)
SLOVENSKI STANDARD
01-februar-2001
Fibre optic communication subsystems - Part 1: Generic specification (IEC 61281-
1:1999)
Fibre optic communication subsystems -- Part 1: Generic specification
Lichtwellenleiter-Kommunikationsuntersysteme -- Teil 1: Fachgrundspezifikation
Sous-systèmes de télécommunications par fibres optiques -- Partie 1: Spécification
générique
Ta slovenski standard je istoveten z: EN 61281-1:1999
ICS:
33.180.01 6LVWHPL]RSWLþQLPLYODNQLQD Fibre optic systems in
VSORãQR general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
NORME
CEI
INTERNATIONALE
IEC
61281-1
INTERNATIONAL
STANDARD
Première édition
First edition
1999-01
Sous-systèmes de télécommunications
par fibres optiques –
Partie 1:
Spécification générique
Fibre optic communication subsystems –
Part 1:
Generic specification
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61281-1 IEC:1999 – 3 –
CONTENTS
Page
FOREWORD . 5
Clause
1 Scope . 7
2 Normative references . 7
3 Definitions. 9
4 Symbols and acronyms . 31
4.1 Symbols. 31
4.2 Acronyms. 31
5 Subsystem characteristics . 35
5.1 General aspects. 35
5.2 Digital fibre optic subsystems . 41
5.2.1 General description . 41
5.2.2 Digital subsystem characteristics. 41
5.2.3 Digital transmitter characteristics. 43
5.2.4 Digital receiver characteristics . 45
5.2.5 Digital regenerator characteristics . 47
5.3 Analogue fibre optic subsystems . 49
5.3.1 General description . 49
5.3.2 Analogue subsystem characteristics . 49
5.3.3 Analogue transmitter characteristics . 51
5.3.4 Analogue receiver characteristics . 53
5.3.5 Analogue repeater characteristics. 55
5.4 Fibre optic links. 55
5.4.1 General description . 55
5.4.2 Fibre optic cable plant characteristics . 57
5.4.3 Fibre optic cable section characteristics. 57
5.4.4 Fibre optic splice and connector characteristics . 57
5.4.5 Optical device characteristics . 59
5.4.6 Optical fibre amplifier characteristics . 59
Annexes
A (informative) Document classification scheme for IEC 61280, IEC 61282
and IEC 61290 . 63
B (informative) Bibliography. 67
61281-1 IEC:1999 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
FIBRE OPTIC COMMUNICATION SUBSYSTEMS –
Part 1: Generic specification
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes International Standards. 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. The 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 the 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 National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical reports or guides and they are accepted by the National Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61281-1 has been prepared by subcommittee 86C: Fibre optic
systems and active devices, of IEC technical committee 86: Fibre optics.
The text of this standard is based on the following documents:
FDIS Report on voting
86C/225/FDIS 86C/233/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.
Annexes A and B are for information only.
61281-1 IEC:1999 – 7 –
FIBRE OPTIC COMMUNICATION SUBSYSTEMS –
Part 1: Generic specification
1 Scope
This part of IEC 61281 is a generic specification for fibre optic communication subsystems
(FOCSs), and is structured according to the IEC Quality Assessment System (IECQ).
Subsystems are classified in families having a common sectional specification. Each sectional
specification is supplemented by blank detail specifications, and detail specifications
appropriate to the specific individual type or types of subsystems.
The parameters defined herein form a specifiable minimum set of specifications that are
common to all fibre optic subsystems. Additional parameters may be needed depending on
the particular application and technology. Those additional parameters will be specified in the
relevant sectional specification and/or detail specification, as appropriate.
Each specified parameter may be measured using one of the test procedures. The use of these
parameters for system design is given in design guides.
2 Normative references
The following normative documents contain provisions which, through reference in this text,
constitute provisions of this part of IEC 61281. At the time of publication, the editions indicated
were valid. All normative documents are subject to revision, and parties to agreements based
on this part of IEC 61281 are encouraged to investigate the possibility of applying the most
recent editions of the normative documents indicated below. Members of IEC and ISO maintain
registers of currently valid International Standards.
IEC 60793-2:1992, Optical fibres – Part 2: Product specification
IEC 60794-2:1989, Optical fibre cables – Part 2: Product specification
IEC 60874-1:1993, Connectors for optical fibres and cables – Part 1: Generic specification
IEC 61291-1:1998, Optical fibre amplifiers – Part 1: Generic specification
61281-1 IEC:1999 – 9 –
3 Definitions
For the purpose of this part of IEC 61281, the following functional and operational definitions
apply. Within a definition, terms defined elsewhere are in italics.
3.1
active optical device
an optical device having gain of power
NOTE – Examples include active branching devices, optical amplifiers, optical modulators, optical regenerators,
and optical repeaters.
3.2
attenuation
the reduction of power (expressed in dB) between the end points of a fibre optic cable plant or
of a passive optical device
3.3
attenuator, optical
a passive optical device which produces a controlled signal attenuation when inserted in the
optical path
3.4
bandwidth
the difference (expressed in Hz) between the highest and lowest modulation frequencies at
which the modulus of the power spectrum or of the complex transfer function is one-half of the
peak value of the modulus
3.5
basic fibre optic system (BFOS)
the serial combination of a transmit terminal device, a fibre optic link, and a receive terminal
device
3.6
bit-error ratio (BER)
the number of errored bits divided by the total number of bits, over some stipulated period of
time
3.7
branching device (BD)
an optical device which has three or more optical ports
NOTE – Branching devices may be either passive (PBD) or active (ABD).
3.8
carrier-to-noise ratio (CNR)
the ratio (expressed in dB) of carrier power to noise power in a channel of defined bandwidth,
prior to any non-linear processing
61281-1 IEC:1999 – 11 –
3.9
centre wavelength
the mean of the closest spaced half-power wavelengths, one above and one below the peak
wavelength of an optical spectrum
NOTE – Other spectral wavelengths are centroidal wavelengths, half-power wavelengths, and peak wavelengths.
3.10
centroidal wavelength
the mean or average wavelength of an optical spectrum
NOTE – Other spectral wavelengths are centre wavelengths, half-power wavelengths, and peak wavelengths.
3.11
chirping
a change of the wavelength or optical frequency of an intensity-modulated transmitter as a
function of the instantaneous intensity of the modulating signal
NOTE – When chirped signals are transmitted through optical fibre, the signal waveform is distorted by chromatic
dispersion. This process may cause a degradation in the quality of performance, designated as a chirping penalty.
3.12
combiner, optical
a wavelength-independent branching device in which the number of input ports exceeds the
number of output ports
3.13
connector, fibre optic
a fibre optic component providing optical interconnection/disconnection of fibre optic cable
sections, optical devices, and terminal devices
3.14
(chromatic) dispersion
the rate of change in group delay to wavelength (usually expressed in ps/nm) between the end
points of the fibre optic cable plant
3.15
environmental conditions
the range of temperatures, humidity, vibration levels, etc. within which the optical device can be
stored, or operated, or shipped and still meet all its specified parameter values
3.16
extinction ratio
in a digital transmission system, the ratio (expressed in dB) of the average power level of
logical "1" to the average power level of logical "0"
3.17
fibre optic cable plant (FOCP)
the serial combination of fibre optic cable sections, connectors, and splices providing the
optical path between two terminal devices, between two optical devices, or between a terminal
device and an optical device
61281-1 IEC:1999 – 13 –
3.18
fibre optic cable section
a single (unjointed) optical fibre cable
3.19
fibre optic communication system
an assembly of fibre optic subsystems for transmitting information
3.20
fibre optic link (FOL)
the serial combination of a fibre optic cable plant and optical devices, providing the optical path
between a transmit terminal device and a receive terminal device
NOTE – This is equivalent to a basic fibre optic subsystem minus the transmitter and receiver.
3.21
fibre optic subsystem
an assembly of interconnected basic fibre optic subsystems. The assembly is specified at
defined interfaces within the fibre optic system
3.22
full-width at half-maximum (FWHM)
the positive difference of the closest spaced half-power wavelengths, one above and one below
the peak wavelength of an optical spectrum
NOTE 1 – Other spectral widths are N-dB-down widths and root-mean-square widths.
NOTE 2 – The FWHM equals the N-dB-down width where N = 3.
3.23
half-power wavelength
a wavelength corresponding to a half peak power value of the optical spectrum
NOTE – Other spectral wavelengths are central wavelengths, centroidal wavelengths, and peak wavelengths.
3.24
harmoni
...
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