1、ELECOMMUNICATION STANDARD FINAL DRAFT prl-ETS 300 227 January 1993 Source: ETSI TC-TM Reference: DITTM-1008 UDC: 621.39 Transmission and Multiplexing (TM); CCITT Recommendation G.652-type single-mode optical fibre ETSI European Telecommunications Standards Institute erst swmmiat Postai address: 0692
2、1 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 - Tlx: 470 040 F 4 s / !L 3 4 d i . European Telecommunications Standards Institute 1 993. All rights reserved. No part may be reproduced except
3、as authorised by written permission. The copyright and the foregoing restriction on reproduction extend to all media in which the information may be embodied, /3./47,36 14 3404583 0054bL2 T52 Page 2 Final draft prl-ETS 300 227:1993 Whilst every care has been taken in the preparation and publication
4、of this document, errors in content, typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to “ETSI Standards Management Dept.“ at the address shown on the title page. 3404583 0054bL3 999 Page 3 Final draft prl-ETS 300 227:1993 Contents Foreword . 5 1 Scop
5、e . 7 2 Normative references . 7 3 Definitions and symbols . 7 3.1 Definitions 7 3.2 Symbols 8 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
6、.5 State of 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 Glass 12 7.1.1 Cladding diameter 12 7.1.2 Cladding non-circularity . 12 7.1.3 Mode field concentricity error 12 7.2 P
7、rimary coating (excluding an additional coloured layer) . 13 7.2.1 Primary coating diameter . 13 7.2.2 Primary coating non-circularity 13 7.2.3 Cladding/Primary coating concentricity error 13 8 Transmission characteristics 13 8.2 Primary coating transmissivity . 13 8.3 Mode field diameter 13 8.4 Cut
8、-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 8.1 Groupindex . 13 History . 16 93163961 4
9、 = 3404583 0054614 825 - Page 5 Final draft prl-ETS 300 227:1993 Foreword This final draft Interim European Telecommunication Standard (I-ETS) has been produced by the Transmission and Multiplexing (TMI Technical Committee of the European Telecommunications Standards Institute (ETSI), and, following
10、 a review of the comments received from Public Enquiry, is now submitted for the voting phase of the ETSI standards approval procedure. An ETSI standard may be given I-ETS status as it is regarded either as a provisional solution ahead of a more advanced standard, or because it is immature and requi
11、res a “trial period“. The life of an LETS 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 two years, be replaced by a new version of the I-ETC or, finally, be withdrawn. This final draft I-ETS
12、 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 188 O00 i21 and CCITT documents which are normative to this final draft LETS (see Clause
13、 2, “Normative references“). This final draft I-ETS has been 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-operation agreement. Previous page is blank 3404583 0054635 763 W
14、 Page 7 Final draft prl-ETS 300 227:1993 1 Scope This I-ETS specifies the functional requirements of silica, primary coated, dispersion non-shifted single- mode optical fibre to be used in cables for duct, directly buried or aerial applications. The requirements take into account CCITT Recommendatio
15、n G. 652 l I, “Characteristics of single-mode optical fibre cable“. The functional requirements specified in this I-ETS refer to uncabled fibre. 2 Normative references This I-ETS incorporates by dated or undated references provisions from other publications. These normative references are cited at t
16、he 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 references the latest edition of the publicatio
17、n referred to applies. r11 121 CCITT Recommendation G.652: “Characteristics of single-mode optical fibre cable (COM XV-R89)“. CCITT Recommendation G.650: “Definition and test methods for the relevant parameters of single-mode fibre (COM XV-R89)“. E31 IEC 86(Secretariat)33: “Fibre optic terminology“.
18、 41 EN 188 000: “Generic Specification: Optical Fibres“. 3 Definitions and symbols 3.1 Definitions For the purposes of this I-ETS, the following definitions apply. Attenuation coefficient: see CCIlT Recommendation G.650 21, paragraph 1.6.2. Attenuation uniformity: uniformity of attenuation coefficie
19、nt along the length of the fibre. Chromatic dispersion: see IEC 866ecretariat133 31, subclause 4.54. Cladding diameter: see CCITT Recommendation G.650 21, paragraph 1.4.3. Cladding non-circularity: see CCITT Recommendation G.650 121, paragraph 1.4.6. Cladding/Primary coating concentricity error: “un
20、der study“. Cut-off wavelength: see CCITT Recommendation G.650 i21, paragraph 1.6.1. Group index: see IEC 86(Secretariat)33 t31, subclause 2.1 O. Hydrogen susceptibility: the permanent increase in attenuation of the fibre due to hydrogen penetration. Longitudinal uniformity: uniformity of some fibre
21、 characteristics along its length. Macrobending attenuaon: 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 CCITT Recommendation G.650 121, paragraph 1.3.4. 931639614 Previous
22、 page is blank Page 8 Final draft prl-ETS 300 227:1993 Mode field diameter: see CCITT Recommendation G.650 121, paragraph 1.2. Primary coating: see CCITT Recommendation G.650 I21, paragraph 1.2.1. Primary coating non-circularity: “under study“. Primary coating transmissivity: “under study“. Proof te
23、st: 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 CClTT Recommendation G.650 t21, paragraph 1.
24、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 corrosion susceptibility
25、 4 General The test methods referred to in this specification 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 Clauses. The f
26、requency 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. 93163961 4 i m 3404583 0054bL7 534 m Page 9 Final draft prl-E
27、TS 300 227:1993 5 Reference lest Methods and Alternative Test Methods Table 1 Parameter Reference Test Method EN 188 0OO.XXX i41 Al ternat ive Test Methods 6.2 Hydrogen susceptibility 6.3 Proof test Optical fibre proof test EN 188 000.201 t41 EN 188 0OO.XXX 141 6.4 Stress corrosion susceptibility St
28、ate of primary coating surface Accelerated ageing Tenperature perf ormance Stripping force 6.5 EN 188 0OO.XXX 141 6.6 EN 188 0OO.XXX C41 6.7 Temperature Cycling EN 188 000.401 141 Str ippabi i i ty EN 188 000.206 141 6.8 7.1 Glass geonietr i Ca 1 characteristics The Transmitted Near Field CCITT Reco
29、mnendation 6.650 121, paragraph 2.2.1 1) Near Field Light Distribution EN 188 000.102 141 2) Refracted Near Field EN 188 000.101 t41 3) Side Vien Techni que CCITT Recomnendation G.650 123 paragraph 2.2.3 7.2 Primary coating geonietri cal characteristics Mode field diameter Transverse Vi eni ng under
30、 consideration 8.3 Direct Far-Field Scanning EN 188 000.314 141 1) Variable Aperture Technique EN 188 000.312 141 2) Knife-edge Scan CCITT Reconmendation G.650 121, paragraph 2.1.3 3) Near-field Scan CCITT Reconmendation 6.650 t21, paragraph 2.1.4 1) Transmitted Poner Technique EN 188 000.312 141 (M
31、ultimode Reference) 2) Split Mandrel Technique CCITT Recomnendation 6.650 21, paragraph 2.3.2 8.4 Cut-off wavelength Ac Transmitted Poner Techni que EN 188 000.312 141 (Sing le-mode Reference) (continued = 3404583 00546318 470 Subclause Page 10 Final draft prl-ETS 300 227:1993 Parameter Reference Te
32、st Method Table 1 (concluded) 8.5 Chromatic dispersion Phase Shift Technique EN 188 000.308 141 8.6 Attenuation coefficient Cut -back technique EN 188 000.301 C41 8.7 Longitudinal uni formi ty Attenuation Uniformi ty EN 188 0OO.XXX t41 . (Based on EN 188 000.303 141) Macrobending Macrobendi ng at te
33、nuat i on EN 188 000.318 141 Alternative lest Methods 1) Differential Phase Shift Technique EN 188 000.310 141 2) Pulse delay technique EN 188 000.309 141 3) Interfermtric technique CCIll Reconmendation 6.650 tZI, pragraph 2.5.2 1) Insertion loss technique EN 188 000.302 141 2) Backscatter technique
34、 EN 188 000.303 143 Unidi rectional Uni formi ty lest Method C EN 188 0OO.XXX 141 NOTE: Where reference is de to EN 188 OOO.XXX, the reason for the 1*XXX81 element is that a method has still to be agreed by Uorking Group 28 of the CECC. 6 Material characteristics 6.1 Material composition The substan
35、ces of which the fibres are made should be indicated. 6.2 Hydrogen susceptibility This parameter is specified for special applications. Non-routine test Length of Fibre: Temperatu re: Time: Partial pressure of hydrogen: PcceDtance criteria: at least 1 O00 metres. 70 “C 1 I I I lo6 Pa I 1 O00 hours o
36、r equivalent values. the permanent effect shall not exceed 0,2 dB/km at nominal wavelengths of 1 310 nm and 1 550 nm. i 931639614 Page 11 Find draft prl-ETS 300 227:1993 6.3 Proof test Conditions: - Temperature: 23 OC f 5 OC, - Relative Humidity: 50 i 20 %. Requirement: - Minimum strain: 0,7% - Time
37、: 1 second or equivalent values, nr 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 Acceler
38、ated 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 perf
39、ormance Non-routine test Sample length: High temperature: + 60 OC. Low temperature: 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. 93/639614 - m 3404583 0054620 O29 m Page 12 Final draft prl-ETS 300 227:1993 A
40、cceota nce criteria (11 T to- 10 “C; (2) - 10 OC to + 30 OC; (3) + 30 OC to + 70 “C. 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. For temperature ranges (1) and (31, the change in
41、 attenuation coefficient shall be I 0,05 dB/km. 6.8 Stripping force Non-routine test Stripping speed: 500 mm/min. Strip length: 50 mm. Tool: with blades which butt but do not bend the fibre. Sample size: 1 o. Method of analysis: ignore the initial peak, average the remainder of the trace. AcceDtance
42、 criteria: The lower limit of the mean of the stripping force for each individual sample shall be L 1 N. The upper limit 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 Glass 7.1.1 Cladding diameter AcceDtance cri
43、teria: 125 f 2pm. 7.1.2 Cladding non-circularity Accectta nce criteria: s 2%. 7.1.3 Mode field concum city error pcceotance criteria individual value: Sample size: Mean: s lpm. L 50 fibres zs 0.5 W 3404583 00546211 Tb5 Page 13 Final draft prl-ETS 300 227: 1993 NOTE: The mode field centre and core ce
44、ntre are generally the same. 7.2 7.2.1 Primary coating diameter Primary coating (excluding an adddonal coloured layer) ACCeDtanCe criteria: 7.2.2 Primary coating non-circularity 245 f 1 O pm. Non-routine test AcceDtance criteria: s 6%. 7.2.3 Cladding/Primary coating concentricity error AcceDtance cr
45、iteria: s 12,5 pm. 8 Transmission characteristics 8.1 Group index The manufacturer should provide a typical value to the user at wavelengths of 1 310 nm and 1 550 nm and indicate the test method used. 8.2 Primary coating transmissivity Non-routine test - “Under consideration“ 8.3 Mode field diameter
46、 Test wavelength: 1 310 rim. AcceDtance criteria: Range of nominals: Tolerance: s 0,5pm. 8,6 pm to 9,5 pm. The nominal value shall be agreed between the user and the manufacturer. 8.4 Cut-off wavelength A“ AcceDta nce criteria: Lower limit: L 1150nm. Upper limit: the acceptance criteria of CCITT Rec
47、ommendation G.652 l I shall apply. The actual values shall be agreed between the user and manufacturer. W 3404583 0054622 9Tl Page 14 Final dr& prl-ETS 300 227:1993 8.5 Chromatic dispersion Non-routine test AcceDtance criteria Zero dispersion wavelength range: 1 300 nm - 1 324 nm. Zero dispersion sl
48、ope: s 0,093 pshm2.km. NOTE: When transmission windows are defined users may wish to specify actual dispersion coefficients across the windows. 8.6 Attenuation coefficient AcceDta nce criteria 1 310 nm: s 0,43 dB/km. 1 550nm: s 0,28 dB/km. Lower values may be agreed between the user and the manufact
49、urer. 8.7 Longitudinal uniformity 8.7.1 Attenuation uniformity Pulse width: 1 /Is. Acceotance criteria: s X dBlkm. At nominal wavelengths of 1 310 nm and 1 550 nm. NOTE 1: The use of this parameter is a matter for agreement between the user and the manufacturer. NOTE 2: The value of X is under study. NOTE 3: The minimum fibre length for this test should be 4 km. NOTE 4: X depends, to some extent, on the fibre length and the pulse width. Ways to minimise such dependence are under study. NOTE 5: X can also depend on the dynamic range, non-linearity, noise and other ch
