IEC 61281-1-2018 pdf download.Fibre optic communication subsystems – Part 1: Generic specification.
This part of IEC 61 281 is a generic specification for fibre optic communication subsystems (FOCSs).
The parameters defined herein form a specifiable minimum set of specifications that are common to all fibre optic subsystems. Additional parameters can be used depending on the particular application and technology. Those additional parameters will be specified in the relevant documents, as appropriate.
Each specified parameter is measured using one of the test procedures. The use of these parameters for system design is given in design guides.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purpose of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
NOTE Within a definition, terms defined elsewhere in Clause 3 are in italics.
3.1 active optical device
optical device, other than an optical dynamic device, exhibiting one or more of the following functions:
• generation or detection of optical power;
• conversion of an electronic signal to a corresponding optical one or vice versa;
• optical amplification or optical regeneration (2R or 3R) of an optical signal;
• direct conversion of the optical frequency of an optical signal
Note 1 to entry: Active optical devices may comprise passive optical elements.
[SOURCE: IEC TS 62538:2008, 2.1 .2, modified – The term “optical active device” has been replaced by “active optical device”.]
3.2 amplified spontaneous emission
ASE optical power associated to spontaneously emitted photon amplified by an active medium in an optical amplifier
Note 1 to entry: This note applies to the French language only.
[SOURCE: IEC TR 61 931 :1 998, 2.7.87 – The note has been added.]
3.3 analogue input signal bandwidth
bandwidth at the electrical input to the transmitter
3.4 attenuation
reduction of optical power induced by transmission through a medium, given as L (dB) where L = 1 0 log 1 0 (P in /P out ), and P in and P out are the power into and out of the transmission medium
Note 1 to entry: P in and P out are typically expressed in mW.
3.5 bandwidth
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
3.6 basic fibre optic system
BFOS serial combination of a transmit terminal device, a fibre optic link, and a receive terminal device
Note 1 to entry: This note applies to the French language only.
3.7 bit-error ratio
BER number of errored bits divided by the total number of bits, over some stipulated period of time
Note 1 to entry: This note applies to the French language only.
3.8 branching device
BD passive device whose purpose is to transfer optical power between two or more ports in a predetermined manner.IEC 61281-1 pdf download.