IEC 61281-1:1999 pdf download – Fibre optic communication subsystems -Part 1: Generic specification

IEC 61281-1:1999 pdf download – Fibre optic communication subsystems -Part 1: Generic specification.
This part of lEG 61281 is a generic specification for fibre optic communication subsystems (FOCS5). and is structured according to the IEC Quality Assessment System (IECO).
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 andor 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 lEG 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 lEG 61281 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. Members 01 lEG and ISO maintain registers of currentty 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 10, optical fibres and cables — Parr 1: Generic specification
IEC 61291-1:1998. Optical fibre amplifiers — Part 1: Generic specification
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.
centroidal wavelength
the mean or average wavelength of an optical spectrum
NOTE — Other spectral wavelengths are centre wavelengths, half• power wavelengths, and peak wavelengths.
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 wavelorm 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 interconnectionldisconnection 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.