1、 ETSI PRI-ETS*300 781 76 m 3400855 0333352 480 ELECOMMUNICATION STANDARD DRAFT pr I-ETS 300 781 August 1996 Source: ETSI TC-TM _ Reference: DI/TM-O1030 ICs: 33.180.20 Key words: fibre, optical, transmission, coupling, PON Transmission and Multiplexing (TM); Functional and system parameters; Passive
2、optical components; MxN fibre branching devices functional specifications ETSI Eu ropean Telecommunications Standards Institute ETSI Secretariat Postal address: F-O6921 Sophia Antipolis CEDEX - FRANCE Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE X.400: c=fr, a=atlas,
3、 p=etsi, s=secretariat - Internet: secretariatQetsi.fr Tel.: i-33 92 94 42 O0 - Fax: +33 93 65 47 16 Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. O European Telecommunica
4、tions Standards Institute 1996. All rights reserved. ETSI PRI-ETSa300 781 96 3400855 0333353 317 = Page 2 Draft prl-ETS 300 781 : August 1996 Whilst every care has been taken in the preparation and publication of this document, errors in content, typographical or otherwise, may occur. If you have co
5、mments concerning its accuracy, please write to “ETSI Editing and Committee Support Dept.“ at the address shown on the title page. ETSI PRI-ETS*300 781 96 3400855 0131354 253 Page 3 Draft prl-ETS 300 781 : August 1996 Contents Foreword . 5 1 Scope 7 2 Normative references 7 3 Definition . 7 4 Tests
6、. 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 4.10 4.1 1 4.12 4.13 4.1 4 4.1 5 4.16 8 Attenuation . 8 4.1.1 Details . 8 4.1.2 Requirements 8 Directivity 9 Return loss . 9 Polarization sensitivity 9 Vibration . 10 Fibre nutation . 10 Dry heat . 10 Damp heat (steady state) . 11 Change of temperature 11 Cold 1
7、1 Condensation . 12 Torsion . 12 Water immersion . 12 Corrosive atmosphere (salt mist) . 13 Industrial atmosphere 13 Dust 13 History 14 ETSI PRI-ETS*300 781 9b 3400855 0131355 19T Page 4 Draft prl-ETS 300 781 : August 1996 Blank page - ETSI PRI-ETS*300 781 96 H 3400855 0131356 02b Page 5 Draft prl-E
8、TS 300 781 : August 1996 Foreword This draft Interim European Telecommunication Standard (LETS) has been produced by the Transmission and Multiplexing (TM) Technical Committee of the European Telecommunications Standards Institute (ETSI), and is now submitted for the Public Enquiry phase of the ETSI
9、 standards approval procedure. An ETSI standard may be given LETS status either because it is regarded as a provisional solution ahead of a more advanced standard, or because it is immature and requires a “trial period“. The life of an LETS is limited to three years after which it can be converted i
10、nto an ETS, have its life extended for a further two years, be replaced by a new version, or be withdrawn. The draft LETS refers to fibre pigtailed components. The optical fibre pigtails or other external fibre interfaces are those described in EN 188000 6 and EN 1881 O1 4. Proposed announcement dat
11、e Date of latest announcement of this LETS (doa): 3 months after ETSI publication ETSI PRI-ETSUIOO 781 96 3400855 0131357 Tb2 Page 6 Draft prl-ETS 300 781 : August 1996 Blank page ETSI PRI-ETS*300 781 lb 3400855 01311358 lT9 Page 7 Draft prl-ETC 300 781 : August 1996 1 Scope This Interim European Te
12、lecommunication Standard (LETS) applies to balanced fibre branching devices to be used in single mode optical transmission networks. Unbalanced fibre branching devices should satisfy similar mechanical and environmental requirements. The scope is to establish minimum uniform requirements for the fol
13、lowing aspects: - - test conditions; - acceptance criteria. optical, environmental and mechanical properties; Some users may have additional specific requirements such as a need to verify performance at lower temperatures. These users should specify branching devices conforming to the basic ETSI per
14、formance standard plus additional tests or more severe test conditions. Acceptance criteria will be interpreted with respect to the consideration that some of the parameters specified in this I-ETS may be affected by measurement uncertainty arising either from measurement or calibration errors. Test
15、 methods are in accordance with EN 181000 l unless otherwise specified. A fibre branching device is defined in subclause 3.1 of this LETS. 2 Normative references This LETS incorporates by dated and undated reference, provisions from other publications. These normative references are cited at the app
16、ropriate 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 LETS only when incorporated in it by amendment or revision. For undated references the latest edition of the publication refer
17、red to applies. Il EN 181 O00 (1 994): “Generic specification: Fibre optic branching devices“. 31 IEC 1300-3-2 (1 995): “Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Examinations and measurements - Part 3-2: Polarization dependence of a single-
18、mode fibre optic device“. IEC 1300-2-5 (1995): “Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Tests - Part 2-5: Torsion/twist“. EN 1881 O1 (1 995): “Family Specification: Single-mode dispersion unshifted (BI .l) optical fibre“. ETS 300 O1 9: “Eq
19、uipment Engineering (EE); Environmental conditions and environmental tests for telecommunications equipment“. FI EN 188000 (1 992): “Generic specification: Optical fibres“. 3 Def i n it ion For the purposes of this LETS, the following definition applies: fibre branching device: A passive optical com
20、ponent which splits the incoming signal (M) to a number of outputs (N). ETSI PRI-ETS*300 781 96 3400855 0131359 835 32 Page 8 Draft prl-ETS 300 781 : August 1996 13,l O 18,60 I 13,l O 18,90 4 Tests All tests are to be carried out to validate performance over the optical pass bands 1 260 nm to 1 360
21、nm and 1 480 nm to 1 580 nm. Upon request, performance in additional pass bands may be required as described in subclause 4.1. The test wavelength requirement for attenuation measurements is that at least three test wavelengths shall be used within each operating range. A minimum length of fibre or
22、cable of 1,5 m per pori shall be included in all climatic and environmental tests. 4.1 Attenuation Attenuation requirements for 1 x N and 2 x N devices are detailed in the next section. Three classes of requirements have been identified. Note that, for example, a device complying with the Class III
23、requirement shall comply with table 1, table 2 and table 3 simultaneously: Class I - II III 4.1.1 Description Attenuation requirement Abbreviation Standard and obligatory requirement for table 1 Standard (S) telecommunications operation in 1 260 nm - 1 360 nm and 1 480 nm - 1 580 nm bands. Method: C
24、ondition: Extended wavelength operation over a 150 nm pass band in the 1 550 nm optical window. table 1 and 2 Extended further in a third window. table land 2 and 3 Details Extended (E) Maintenance (M) EN 181 O00 l, subclause 4.5.5. The minimum and maximum attenuation values apply to any combination
25、 of input and output port. 4.1.2 Requirements Other numbers of output ports can be specified. Table 1: Wavelengths 1 260 nm - 1 360 nm and 1 480 nm - 1 580 nm ETSI PRI-ETS*300 741 9b D 3400855 OL3L360 557 W Page 9 Draft prl-ETS 300 781 : August 1996 Table 2: Wavelengths 1 450 nm - 1 480 nm and 1 580
26、 nm - 1 600 nm I M=l I M=2 I N I Attenuation: I Attenuation: I Attenuation: I Attenuation: Table 3: Wavelength 1 600 nm - 1 650 nm M=l I M=2 I N I Attenuation: I Attenuation: I Attenuation: I Attenuation: 4.2 Directivity Method: Condition: Requirements : EN 181 O00 l, subclause 4.5.5. Directivity is
27、 measured between any pair of adjacent input and output ports. Allowable directivity of 55 dB (minimum). 4.3 Return loss Method: EN 181000 l, subclause 4.5.6. Condition: All ports not under test shall be optically terminated to avoid unwanted reflections contributing to the measurement. Requirements
28、: Allowable return loss of 55 dB (minimum). The value of the return loss shall be maintained throughout all the tests. 4.4 Polarization sensitivity Method: IEC 1300-3-2 121, method A (all polarization states). Condition: The allowable sensitivity applies to every combination of input and output port
29、. Requirements: Maximum allowable loss variation of 0,20 dB for N 5 4 and 0,50 dB for N 4. ETSI PRI-ETS*3OO 781 96 3400855 O333363 493 = Page 10 Draft prl-ETS 300 781 : August 1996 4.5 Vibration Method: EN 181000 l, subclause 4.6.1. Details: frequency range: 10 - 55 Hz; displacement: 0,75 mm; number
30、 of axes: three orthogonal; endurance duration per axis: number of cycles (1 0-55-1 O): 0,50 hours; 15. Requirements: On completion of the test, the attenuation limits of subclause 4.1.2 shall be met and the attenuation shall be within the following limits of the initial value: - ,- I 0,30 dB where
31、N I 4; f 050 dB where N 4. During the test, the attenuation value shall be measured at a maximum interval of 2 ms in at least one of the output ports. 4.6 Fibre nutation This test is intended for use with devices terminated with reinforced cable. Method: Details: Requirements: 4.7 Dry heat Method: D
32、etails: Requirements: EN 181000 l, subclause 4.6.35. number of cycles: 1 o; tensile force: 10 N. On completion of the test, the attenuation limits of subclause 4.1.2 shall be met and the attenuation shall be within the following limits of the initial value: - - * 0,30 dB where N 54; A 0,50 dB where
33、N 4. EN 181000 l, subclause 4.6.18. temperature: +70“C; duration of exposure: 96 hours; preconditioning procedure: recovery procedure: standard atmospheric conditions for 2 hours (see subclause 4.1 of EN 181000 l); allow specimen to return to 20C in period not exceeding 2 hours. During the test, the
34、 attenuation limits of subclause 4.1.2 shall be met. During and on completion of the test, the attenuation shall be within the following limits of the initial value: - - I 0,30 dB where N 14; I 0,50 dB where N 4. During the test, the attenuation value shall be measured at a maximum interval of 1 hou
35、r during the first 16 hours and thereafter at a maximum interval of 24 hours until completion of the test. Page 11 Draft prl-ETS 300 781 : August 1996 4.8 Damp heat (steady state) Method: EN 181 O00 l subclause 4.6.1 9. Details: temperature: 40C; relative humidity: exposure duration: 96 hours; preco
36、nditioning procedure: recovery procedure: 93 % f 2 %; standard atmospheric conditions for 2 hours (see subclause 4.1 of EN 181000 l); allow specimen to return to 20C in period not exceeding 2 hours. Requirements: During the test, the attenuation limits of subclause 4.1.2 shall be met. During and on
37、completion of the test, the attenuation shall be within the following limits of the initial value: - . - * 0,30 dB where N 5 4; I 0,50 dB where N 4. During the test, the attenuation value shall be measured at a maximum interval of 1 hour. 4.9 Change of temperature Method: EN 181 O00 l, subclause 4.6
38、.22. Details: high temperature: +70“C; duration at extreme temperatures: 1 hour; rate of temperature change: 1 “C/minute; preconditioning procedure: standard atmospheric conditions for 2 hours; recovery procedure: allow specimen to return to 20C in period not exceeding 2 hours. low temperature: -25C
39、; number of cycles: 12; Requirements: During the test, the attenuation limits of subclause 4.1.2 shall be met. During and on completion of the test, the attenuation shall be within the following limits of the initial value: - - I 0,30 dB where N 5 4; f 0,50 dB where N 4. During the test, the attenua
40、tion value shall be measured at a maximum interval of 10 minutes. 4.10 Cold Method: EN 181000 l, subclause 4.6.17. Details: temperature: -25C; duration of exposure: 16 hours; preconditioning procedure: recovery procedure: standard atmospheric conditions for 2 hours; allow specimen to return to 20C i
41、n period not exceeding 2 hours. Requirements: During the test, the attenuation limits of subclause 4.1.2 shall be met. During and on completion of the test, the attenuation shall be within the following limits of the initial value: - - * 0,30 dB where N 54; * 0,50 dB where N 4. During the test, the
42、attenuation value shall be measured at a maximum interval of 1 hour. ETSI PRI-ETS*300 781 96 3400855 01313b3 266 = Page 12 Draft prl-ETC 300 781 : August 1996 4.1 1 Condensation This test shall be carried out on devices which are to be used in weather protected environments corresponding to ETS 300
43、O19 5, classes 3.3, 3.4 or 3.5, or in non-weather protected environments corresponding to ETS 300 O19 5, class 4.1. Method: EN 181000 l, subclause 4.6.21 Details: preconditioning procedure: recovery procedure: standard atmospheric conditions for 2 hours; allow specimen to return to 2OoC in a period
44、not exceeding 2 hours. Requirements: During the test, the attenuation limits of subclause 4.1.2 shall be met. During and on completion of the test, the attenuation shall be within the following limits of the initial value: - - I 0,30 dB where N 54; * 0,50 dB where N 4. During the test, the attenuati
45、on value shall be measured at a maximum interval of 10 minutes. 4.12 Torsion This test is not applicable to devices terminated with primary coated fibre. Method: IEC 1300-2-5 3. Details: magnitude and rate of application of the tensile load: - - point of application of the tensile load: 0,2 m from t
46、he end of the device; 15 N at a speed of 1 N/s (for reinforced cable terminated devices); 2 N at a speed of 0,l N/s (for secondary coated fibre terminated devices); duration of the test: rotation: i 180“. 25 cycles (not to exceed the cable specification); Requirements: On completion of the test, the
47、 attenuation limits of subclause 4.1.2 shall be met and the attenuation shall be within the following limits of the initial value: - - * 0,30 dB where N 54; * 0,50 dB where N 4. 4.13 Water immersion This test shall be carried out on devices which are to be used in weather protected environments corr
48、esponding to ETS 300 O1 9 5, classes 3.3, 3.4 or 3.5 or in non-weather protected environments corresponding to ETS 300 O1 9 5, class 4.1. Method: EN 181000 l, subclause 4.6.24. Details: head of water: temperature: duration: 150 mm; +43“C; 168 hours. Requirements: During the test, the attenuation lim
49、its of subclause 4.1.2 shall be met. During and on completion of the test, the attenuation shall be within the following limits of the initial value: - - 2 0,30 dB where N 5 4; I 0,50 dB where N 4. During the test, the attenuation value shall be measured at a maximum interval of 1 hour. ETSI PRI-ETSU300 781 9b = 3400855 011311364 IT2 = Page 13 Draft prl-ETS 300 781 : August 1996 4.14 Corrosive atmosphere (salt mist) This test shall be carried out on devices which are to be used in weather protected environments co
