1、 STD.BSI BS EN b128L-1-ENGL 1777 LbZlibbS 0783911 3b5 W BRITISH STANDARD Fibre optic communication subsystems - Part 1: Generic specification The European standard EN 61821-1:1999 has the status of a British Standard ICs 33.180.01 BS EN 61281-1:1999 IEC 61281-k1999 STD-BSI BS EN b3283-L-ENGL 3999 3b
2、24bb9 0783932 2TL direction of the Electrotechnicai Sector Committee,was published under the authority of the Standards Committee. and comes into effect on 16 July 1999 Amd. No. BS EN 61281-k1999 Da comments National foreword This British standard is the English language version of EN 61281-1:1999.
3、It is identicai with IEC 61281-1:1999. The UK participation in its preparation was entrusted by Technical Committee GEys6, Fibre optics, to Subcommittee GEL/86/3, Fibre optic systems and active devices, which has the responsibty to: - aid enquirem to understand the text; - present to the responsible
4、 internatiormlhhropean committee any enquiries on the interpretation, or proposais for change, and keep the UK intmests - monitor reiated international and European developments and promulgate iIlfOrItled; them in the UK. A list of organizations represented on this subcommittee can be obtained on re
5、quest to its smw. From 1 January 1997, all IEC publicaiions have the number 60000 added to the old number. For instance, IEC 27-1 has been renumbered as IEC 60027-1. For a period of time during the change over from one numbering system to the other, publications may contajn identifiers from both sys
6、tems. Cross-references Attention is rawn to the fact that CEN and CENELEC Standards normally include an annex which lists normative references to international publications with their corresponding European publications. The British Standards which implement these intrnationd or European publication
7、s may be found in the BSI Standards Catalogue under the section entitled “internationai Standards Correspondence Index“, or by using the “Find“ facility of the BSI Stanclards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of Bri
8、tish Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 35 and a back cover. O BSI 07-1999
9、I I l l ISBN O O80 32689 6 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 61281-1 April 1999 ICs 33.1 80.01 English version Fibre optic communication subsystems Part 1 : Generic specification (IEC 61281-1:1999) Sous-systmes de tlcommunications Lichtwellenleiter- par fibres optiques Kommuni kat
10、ionsuntersysteme Partie 1 : Spcification gnrique Teil 1 : Fachgrundspezifikation (CE1 61 281 -1 1999) (IEC 61 281-1 1999) This European Standard was approved by CENELEC on 1999-04-01. CENELEC members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for givi
11、ng this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official v
12、ersions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the officiai versions. CENELEC members are the national electrotechnical committees
13、 of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany. Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrote
14、chnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassan 35, B - 1050 Brussels 1999 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61281-1:1999 E STD-BSI BS EN IJLZBL-L-ENGL 1999 m Lb2qbb 07839
15、LL( 07q Page 2 EN 61281-11999 Foreword The text of document 86C/225/FDIS, future edition 1 of IEC 61 281.-1, prepared by SC 86C, Fibre optic systems and active devices, of IEC TC 86, Fibre optics, was submitted to the IEC- CENELEC parallel vote and was approved by CENELEC as EN 61 281 -1 on 1999-04-
16、01. The following dates were fixed: - latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2000-0 1 -01 - latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2002-0 1 -0
17、 1 Annexes designated “normative“ are part of the body of the standard. Annexes designated “informative“ are given for information only. In this standard, annex ZA is normative and annexes A and B are informative. Annex ZA has been added by CENELEC. Endorsement notice The text of the International S
18、tandard IEC 61281-1:1999 was approved by CENELEC as a European Standard without any modification. STD-BSI BS EN bL28L-L-ENGL 1777 3b2Libb7 0783735 TOO 8 Page 3 EN 61281-1:1999 CONTENTS Page Clause 4 1 Scope .,. 4 2 Normative references , . . . , 5 3 Definitions .,. . 16 4 Symbols and acronyms . . ,
19、. . . 16 4.1 Symbols .,. . 4.2 Acronyms , 16 18 5 Subsystem characteristics ,.,., 18 5.1 General aspects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.2 Digital fibre optic subsystems . . 21 21 5.2.1 General description . . . . , 5.2.2 Digital subsystem characteristics . 21 2
20、2 5.2.3 Digital transmitter characteristics . 5.2.4 Digital receiver characteristics . 23 5.2.5 Digital regenerator characteristics . 24 25 Analogue fibre optic subsystems . . . 5.3.1 General description .,.,.,.,. 25 5.3.2 Analogue subsystem characteristics 25 26 5.3.3 Analogue transmitter character
21、istics ., 5.3.4 Analogue receiver characteristics . . 27 28 5.3.5 Analogue repeater characteristics . 28 5.4 Fibre optic links .,.,.,., 5.4.1 General description . . 28 29 5.4.2 Fibre optic cable plant characteristics 5.4.3 Fibre optic cable section characteristics . 29 29 5.4.4 Fibre optic splice a
22、nd connector characteristics . 5.4.5 Optical device characteristics . . 30 5.4.6 Optical fibre amplifier characteristics . . . 30 5.3 Annexes A B ZA (normative) Normative references to international publications with their corresponding European publications 35 (informative) Document classification
23、scheme for IEC 61280, IEC 61282 and IEC 61290 . 32 (informative) Bibliography 34 O BSI 07-1999 Page 4 EN 61281-11999 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 i
24、s 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 typ
25、es 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 se
26、ctional 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, th
27、rough 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 ap
28、plying the most recent editions of the normative documents indicated below. Members of IEC and IS0 maintain registers of currently valid International Standards. IEC 60793-2: 1 992, Optical fibres - Part2: Product specification IEC 60794-2: 1 989, Optical fibre cables - Part 2: Product specification
29、 IEC 60874-1 : 1 993, Connectors for optical fibres and cables - Part 1: Generic specification IEC 61 291 -1 : 1 998, Optical fibre amplifiers - Part I: Generic specification Page 5 EN 61281-1:1999 3 Definitions For the purpose of this part of IEC 61281, the following functional and operational defi
30、nitions 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 redu
31、ction 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
32、 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 termi
33、nal 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 (PED) or active (ABD). 3.8 carrier
34、-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 STD-BSI BS EN b1283-1-ENGL 1979 lb2gbb9 0783936 7LT D Page 6 EN 61281-1:1999 3.9 centre wavelength the mean of the closest spaced half-power wavelen
35、gths, 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
36、centre wavelengths, half-power wavelengths, and peak wavelengths. 3.1 1 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 fib
37、re, 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
38、.13 connector, fibre optic a fibre optic component providing optical interconnection/disconnection of fibre optic cable sections, optical devices, and terminal devices 3.14 (chrornatlc) dispersion the rate of change in group delay to wavelength (usually expressed in ps/nm) between the end points of
39、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 r
40、atio (expressed in dB) of the average power level of logical “1“ to the average power level of logical “O“ 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 de
41、vices, or between a terminal device and an optical device STD.BSI BS EN b3283-1-ENGL 1779 6 Zb24bb9 13783939 b5b 6 Page 7 EN 61281-1:1999 3.18 fibre optic cable section a single (unjointed) optical fibre cable 3.1 9 fibre optic communication ryrtem an assembly of fibre optic subsystems for transmitt
42、ing 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 receiv
43、er. 3.21 fibre optic subrystem 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 belo
44、w the peak wavelength of an optical spectrum NOTE 1 - Other spectral widths are N-dB-down widths and root-mean-square widths. NOTE 2 - lhe FWHM equals the KdB-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
45、 spectral wavelengths are Central WaVe/8flgfhS, centroidal wavelengths, and peak wavelengths. 3.24 harmonic distortion distortion in a system or transducer characterized by the presence at the output of spectral components which are harmonically related to the spectral components of the input signal
46、 l 3.25 input power range for an optical fibre amplifier, the range of optical power levels such that, for any input signal power of the OFA which lies within this range, the corresponding output signal power lies in the specified output power range, where the OFA performance is ensured 3.26 input s
47、ignal bandwidth, analogue the bandwidth at the electrical input to the transmitter Figures in square brackets refer to the bibliography given in annex B. STDmBSI BS EN b1281-1-ENGL 1747 I lb2qbb7 0783720 378 m Page 8 EN 61281-1:1999 3.27 intermodulation distortion (IMD) distortion characterized by t
48、he appearance of spectral components with frequencies equal to the sums and differences of integral multiples of two or more component frequencies of the input signal l J 3.28 interrymbol interference (ISI) the overlap of adjacent pulses as caused by the limited bandwidth characteristics of the opti
49、cal devices in a fibre optic link 3.29 jitter random or data-induced short-term non-cumulative variations of the phases or of the significant instants of a digital signal from their ideal positions in time relative to a reference (clock) signal NOTE 1 - In practice, short-term“ embraces all spectral components of 10 Hz and above. NOTE 2 - Jitter is expressed in terms of absolute time or as a fraction of a unit interval. 3.30 jitter transfer function the ratio of the output jitter to the applied input jitter as a function of modulation frequency
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