1、m 3404583 0064823 725 m - STANDARD CATION I-ETS 300 227 June 1993 Source: ETSI TC-TM Reference: DI/TM-1008 UDC: 621.39 Key words: Transmission, multiplexing, optical fibre Transmission and Multiplexing (TM); ITU-T Recommendation G.652-type single-mode optical fibre ETS I European Telecommunications
2、Standards Institute ETSI Secretariat Postal address: 06921 Sophia Antipolis Cedex - FRANCE Office address: Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE Tel.: + 33 92 94 42 O0 - Fax: + 33 93 65 47 16 European Telecommunications Standards Institute 1 993. All rights reserved. No part may
3、be reproduced except as authorised by written permission. The copyright and the foregoing restriction on reproduction extend to all media in which the information may be embodied. 3404583 0064822 bbL Page 2 LETS 300 227: 1993 Whilst every care has been taken in the preparation and publication of thi
4、s document, errors in content, typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to “ETSI Editing and Standards Approval Dept.“ at the address shown on the title page. 0 3404583 ClOb4823 5T8 D Page 3 I-ETS 300 2271993 Contents Foreword . 5 1 Scope 7 2
5、Normative references . 7 3 Definitions and symbols 7 3.2 Symbols 8 3.1 Definitions 7 4 General . 8 5 Reference Test Methods and Alternative Test Methods 9 6 Material characteristics 10 6.1 Material composition . 10 6.2 Hydrogen susceptibility . 10 6.4 Stress corrosion susceptibility . 11 6.5 State o
6、f primary coating surface . 11 6.6 Accelerated ageing 11 6.7 Temperature performance . 11 6.8 Stripping force . 12 6.3 Prooftest . 11 7 Geometrical characteristics . 12 7.1.1 Cladding diameter 12 7.1.2 Cladding non-circularity . 12 7.1.3 Mode field concentricity error 12 7.2.1 Primary coating diamet
7、er . 13 7.1 Glass 12 7.2 Primary coating (excluding an additional coloured layer) . 13 7.2.2 Primary coating non-circularity 13 7.2.3 Cladding/Primary coating concentricity error 13 8 Transmission characteristics 13 8.1 Groupindex . 13 8.2 Primary coating transmissivity . 13 8.3 Mode field diameter
8、13 8.4 Cut-off wavelength (A. ) . 13 8.5 Chromatic dispersion . 14 8.6 Attenuation coefficient . 14 8.7 Longitudinal uniformity 14 8.7.1 Attenuation uniformity . 14 8.7.2 Backscatter uniformity . 14 8.7.3 Unidirectional uniformity 14 8.8 Macrobending attenuation . 15 History . 16 3404583 0064824 434
9、 Page 5 I-ETS 300 2271993 Foreword This Interim European Telecommunication Standard (I-ETS) has been produced by the Transmission and Multiplexing (TM) Technical Committee of the European Telecommunications Standards Institute (ETSI). An ETSI standard may be given I-ETS status as it is regarded eith
10、er as a provisional solution ahead of a more advanced standard, or because it is immature and requires a “trial period“. The life of an I-ETS is limited, at first, to three years after which it can be converted into a European Telecommunication Standard (ETS), have its life extended for a further tw
11、o years, be replaced by a new version of the I-ETS or, finally, be withdrawn. This I-ETS concerns the functional requirements for single-mode optical fibre to be used in cables for duct, directly buried and aerial cable applications. References are made to test methods and acceptance criteria in EN
12、188 O00 141 and ITU-T Recommendations which are normative to this I-ETS (see Clause 2, “Normative references“). This I-ETS was produced in accordance with a specialised agreement on “Work Repartition and Co-operation for Standardisation concerning fibre optics“ and is part of the CEN/CENELEC/ETSI co
13、-operation agreement. Previous page is blank 3404583 O064825 370 Page 7 LETS 300 227: 1993 1 Scope This I-ETS specifies the functional requirements of silica, primary coated, dispersion non-shifted single- mode optical fibre used in cables for duct, directly buried or aerial applications. The requir
14、ements take into account ITU-T Recommendation G. 652 11, “Characteristics of a single-mode optical fibre cable“. The functional requirements specified in this I-ETS refer to uncabied fibre. 2 Normative references This I-ETS incorporates by dated or undated references provisions from other publicatio
15、ns. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this I-ETS only when incorporated in it by amendment or revision. For undated re
16、ferences the latest edition of the publication referred to applies. ll i21 i31 41 3 3.1 ITU-T Recommendation G.652 (1 993): “Characteristics of a single-mode optical fibre cable“. ITU-T Recommendation G.650 (1 993): “Definition and test methods for the relevant parameters of single-mode fibres“. IEC
17、 86Eecretariatl33: “Fibre optic terminology“. EN 188 000: “Generic Specification: Optical Fibres“. Definitions and symbols Definitions For the purposes of this I-ETS, the following definitions apply. Attenuation coefficient: see ITU-T Recommendation G.650 i21, paragraph 1 -6.2. Attenuation uniformit
18、y: uniformity of attenuation coefficient along the length of the fibre. Chromatic dispersion: see IEC 86Gecretariat133 31, subclause 4.54. Cladding diameter: see ITU-T Recommendation G.650 121, paragraph 1.4.3. Cladding noncircularity: see ITU-T Recommendation G.650 21, paragraph 1.4.6. CladdinglPri
19、mary coating concentricity error: “under study“, Cut-off wavelength: see ITU-T Recommendation G.650 21, paragraph 1.6.1. Group index: see IEC 36(Secretariat)33 131, subclause 2.1 O. Hydrogen susceptibility: the permanent increase in attenuation of the fibre due to hydrogen penetration. Longitudinal
20、uniformity: uniformity of some fibre characteristics along its length. Macrobending attenuation: the attenuation due to the bending of the fibre with a constant radius. Material composition: the substances of which the fibres consist. Mode field concentricity error: see ITU-T Recommendation G.650 t2
21、1, paragraph 1.3.4. Previous page is blank Page 8 I-ETS 300 227: 1993 Mode field diameter: see ITU-T Recommendation G.650 121, paragraph 1.3.2. Primary coating: see ITU-T Recommendation G.650 121, paragraph 1.2.1. Primary coating noncircularity: “ under study“. Primary coating transmissivity: “under
22、 study“. Proof test: the action of stressing an optical fibre to a minimum value. This has the effect of causing breaks to occur at all flaws which have a strength lower than this value. State of primary coating surface: “under study“. Stress corrosion susceptibility: see ITU-T Recommendation G.650
23、121, paragraph 1.2.4. Stripping force: force necessary to remove the primary coating from the fibre. Temperature performance: change in attenuation due to temperature cycling of the fibre. 3.2 Symbols For the purposes of this I-ETS, the following symbols apply. Ac Cut-off wavelength n Stress corrosi
24、on susceptibility 4 General The test methods referred to in this I-ETS are Reference Test Methods and Alternative Test Methods. Alternative Test Methods may be used for practical tests. Certain tests are not required to be conducted on a routine basis and are identified as such in the relevant Claus
25、es. The frequency of all tests shall be agreed between the user and the manufacturer under a capability approval procedure. Where reference is made under “Acceptance criteria“ to “no change in attenuation“ then this shall be taken as being s 0,05dB. t 3404583 006482?7 143 Page 9 I-ETS 300 227:1993 5
26、 Reference Test Methods and Alternative Test Methods Table 1 Subclause 6.2 6.3 6.4 6.5 6.6 6.7 6.8 7.1 7.2 8.3 8.4 Parameter Hydrogen susceptibility Proof test Stress corrosion susceptibility State of primry coating surface Accelerated ageing Tenperature performance Stripping force 6 1 ass geanetr i
27、 cal characteristics Primary coating geanet r i cal characteristics Mode field diameter Cut-off wavelength (a,) Reference Test Method EN 188 O00 141, test method XXX Optical fibre proof test EN 188 O00 143, test method 201 EN 188 O00 143, test method XXX Under consideration EN 188 O00 C41, test meth
28、od XXX Tenperature Cycling EN 188 O00 C43, test method 401 Strippability EN 188 O00 C41, test method 206 The Transmitted Near Field ITU-T Reconmendation 6.650 121, paragraph 2.2.1 Transverse View i ng uider consideration Direct Far-Field Scanning method 314 EN 188 O00 C43, test Transmitted Power Tec
29、hnique EN 188 000 141, test method 312 (Single-mode Reference) Alternative Test Methods 1) Near Field Light Distribution EN 188 O00 141, test method 102 2) Refracted Near Field EN 188 O00 141, test method 101 3) Side View Techni que ITU-T Recomnendation 6.650 CE paragraph 2.2.3 1) Variable Aperture
30、Technique EN 188 O00 C41, test method 315 2) Knife-edge Scan ITU-T Reconmendation 6.650 121, paragraph 2.1 -3 3) Near-field Scan ITU-T Reconmendation 6.650 121, paragraph 2.1 .4 1) Transmitted Power Technique EN 188 O00 141, test niethod 312 (Multimode Reference) 2) Split Mandrel Technique ITU-T Rec
31、onmendation 6.650 121, paragraph 2.3.2 (continued) 3404583 O064828 OBT Page 10 I-ETS 300 227:1993 Table 1 (concluded) Suk lause 8.5 8.6 8.7 Paraneter Chraniat i c dispersion Attenuation coefficient Longitdinel uniformity Uacrobending attenuation Reference Test Alternative Method Test Methods Phase S
32、hift Technique EN 188 O00 143, test method 308 1) Differential Phase Shift Technique EN 188 O00 41, test method 310 2) Pulse delay technique EN 188 O00 41, test method 309 3) Interferometric technique ITU-T Recumnendation 6.650 El, paragraph 2.5.2 Cut-back technique EN 188 000.301 i41 1) Insertion L
33、oss technique EN 188 O00 141, test nethod I 302 2) Backscatter technique I EN 188 O00 Il. test method Attenuation Uni formi ty EN 188 000 141, test method XXX (Based on EN 188 000 143, test method 303 Uacrobending EN 188 O00 41, test method 318 NOTE: Mere reference is made to EN 188 O00 141, test me
34、thod XXX, the reason for the “XXX“ elanent is that a method has still to be agreed by Ut 28 CECC. 6 Material characteristics 6.1 Material composition The substances of which the fibres are made should be indicated. 6.2 Hydrogen susceptibility This parameter is specified for use where agreed between
35、manufacturer and user. Non-routine test Length of Fibre: Tem pera tu re : Time: Partial pressure of hydrogen: Accemance criteria: at least 1 O00 metres. 70 “C 1 I I I io6 Pa J 1 O00 hours or equivalent values. the permanent effect shall not exceed 0,2 dBkm at nominal wavelengths of 1 310 nm and 1 55
36、0 nm. A more relaxed requirement may be agreed between manufacturer and user. D 3404583 00b4829 Tlb D Page 11 I-ETS 300 2271993 6.3 Proof test Conditions: - Temperature: 23 I 5 OC, - Relative Humidity: 50 i 20 %. Minimum requirement: - Strain: 0,7% - Time: 1 second or an equivalent combination of va
37、lues, stress corrosion susceptibility n value is “under study“. It should be indicated if the proof test method is on-line or off-line. 6.4 Stress corrosion susceptibility Non-routine test - “Under consideration“. 6.5 State of primary coating surface Non-routine test - “Under consideration“. 6.6 Acc
38、elerated ageing 1 Non-routine test Dry heat: Damp heat: NOTE 1: NOTE 2: “ Under consideration“. “ Under consideration“. Acceptance Criteria involves changes in attenuation and stripping force. Coating degradation at elevated temperatures limits the operational temperature capability. 6.7 Temperature
39、 performance Non-routine test Sample length: High temperature: + 70 OC. Low temperature(T1: at least 1 O00 metres. - 20 OC to - 45 OC in accordance with particular user conditions. Number of cycles: 2 2. Dwell time: 2 30 minutes. 3404583 00b11830 738 Page 12 I-ETS 300 227: 1993 I AcceDtance criteria
40、: (1) T to- 10C; (2) - 10 “C to + 30 OC; (3) There shall be no change in attenuation, for temperature range (21, when measured in the 1 550 nm region or at the operational wavelength when specified by the user. + 30 OC to + 70 “C. For temperature ranges (1) and (3, the change in attenuation coeffici
41、ent shall be s 0,05 dBkm. 6.8 Stripping force Non-routine test Stripping speed: Strip length: Tool: Sample size: Method of analysis: 500 mm/min. 50 mm. with blades which butt but do not bend the fibre. 1 o. ignore the initial peak, average the remainder of the trace. Acceotance criteria: The lower l
42、imit of the mean of the stripping force for each individual sample shall be a 1 N. The upper limit of the mean of the stripping force for each individual sample shall be in the range 3,5 N to 5 N, the actual value to be agreed between the user and manufacturer. 7 Geometrical characteristics 7.1 Glas
43、s 7.1.1 Cladding diameter AcceDtance criteria: 125 i 2p. 7.1.2 Cladding non-circularity AcceDtance criteria: s 2%. 7.1.3 Mode field concentricity error AcceDtance criteria: Individual value: Sample size: Mean: s 1 Bm. 2 50 fibres. s 0,5pm. * 3404583 O064833 674 M L Page 13 I-ETS 300 2271993 NOTE: Th
44、e mode field centre and core centre are generally the same. 7.2 7.2.1 Primary coating diameter Primary coating (excluding an additional coloured layer) AcceDtance criteria: 7.2.2 Primary coating nontircularity 245 f 10 pm. Non-routine test AcceDtance criteria: s 6%. 7.2.3 CladdinglPrimary coating co
45、ncentricity error AcceDtance criteria: s 12,5 pm. 8 Transmission characteristics 8.1 Group index The manufacturer should provide a typical value to the user at wavelengths of 1 31 O nm and 1 550 nm and indicate the test method used. 8.2 Primary coating transmissivity Non-routine test - “Under consid
46、eration“. 8.3 Mode field diameter Test wavelength: 1 310 nm. Acceotance criteria: Range of nominals: Tolerance: 5 0,5pm. The nominal value shall be agreed between the user and the manufacturer. 8.4 Cut-off wavelength U,) 8,6 p to 9,5 ,um. AcceDtance criteria: Lower limit: L 1150nm. Upper limit: the
47、acceptance criteria of ITU-T Recommendation G.652 il 1 shall apply. The actual values shall be agreed between the user and manufacturer. H 3404583 O064832 500 H Page 14 I-ETS 300 227:1993 8.5 Chromatic dispersion Non-routine test Acceotance criteria: Zero dispersion wavelength range: Zero dispersion
48、 slope: 1 300 nm - 1 324 nm. s 0,093 ps nm-2 km“. NOTE: When transmission windows are defined users may wish to specify actual dispersion coefficients across the windows. 8.6 Attenuation coefficient Acceotance criteria: 1 310 nm: s 0,43 dB/km. 1550 nm: s 0,28 dB/km. Lower values may be agreed betwee
49、n the user and the manufacturer. 8.7 Longitudinal uniformity 8.7.1 Attenuation uniformity Pulse width: 1 ps. AcceDtance criteria: s XdBkm. At nominal wavelengths of 1 310 nm and 1 550 nm. NOTE 1: NOTE 2: NOTE 3: NOTE 4: NOTE 5: The use of this parameter is a matter for agreement between the user and the manufacturer. The value of X is under study. The minimum fibre length for this test should be 4 km. X depends, to some extent, on the fibre length and the pulse width. Ways to minimise such dependence are under study. X can also depend on
