1、TELECOMMUNICATION STANDARD FINAL DRAFT pr I-ETS 300 781 Decem ber 1997 Source: TM Reference: DI/TM-O1030 ICs: 33.020 Key words: Coupling, fibre, optical, PON, transmission Transmission and Multiplexing (TM); Functional and system parameters; Passive optical components; MxN fibre branching devices fu
2、nctional specifications ETSI European 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, p=etsi, s=secretariat - Internet: secretariatQetsi
3、.fr Tel.: +33 4 92 94 42 O0 - Fax: +33 4 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 Telecommunications Standards Institute 1997. All rights reser
4、ved. STD-ETSI PRI-ETS 300 781-ENGL 1997 W 3400855 02Li321b LTO W Page 2 Final draft prl-ETS 300 781 : December 1997 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 comments concerning its accu
5、racy, please write to I 1 “ETSI Editing and Committee Support Dept.“ at the address shown on the title page. Page 3 Final draft prl-ETS 300 781: December 1997 Contents Foreword . .-_. 5 1 Scope . 7 2 Normative references . 7 3 Definition . 7 4 Tests 8 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 4.10 4.11 4.
6、12 4.13 4.14 4.15 4.16 4.17 4.18 4.19 4.20 4.21 Visual Inspection . 8 Attenuation . 4.2.1 Details . 8 4.2.2 Requirements 8 Return loss 9 Spectral dependence of attenuation 10 Polarization sensitivity ._ _ 1 O Directivity . 10 Vibration . . 10 . 10 . 11 11 Fibre nutation . . 11 Cold 12 Dry heat . 12
7、Damp heat (steady state) . 21 Damp heat (cyclic) . 13 Change of temperature 31 Corrosive atmosphere (salt mist) 14 Industrial atmosphere . ._. 14 Dust 14 Condensation 15 Water immersion . 51 5 Acceptance criteria . 15 5.1 Attenuation and return loss . 51 5.2 Other optical, environmental and mechanic
8、al requirements . 15 5.3 Pass/fail criteria . 16 History . _._. . 17 STD.ETSI PRI-ETS 300 78L-ENGL 1797 3400855 0243238 T73 Page 5 Final draft prl-ETS 300 781: December 1997 Foreword This final draft Interim European Telecommunication Standard (I-ETS) has been produced by the Transmission and Multip
9、lexing (TM) Technical Committee of the European Telecommunications Standards Institute (ETSI), and is now submitted for the Voting phase of the ETSI standards approval procedure. An ETSI standard may be given LETS status either because it is regarded as a provisional solution ahead of a more advance
10、d 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 into an ETS, have its life extended for a further two years, be replaced by a new version, or be withdrawn. The LETS refers to fibre pigtailed components
11、. The optical fibre pigtails or other external fibre interfaces are those described in EN 188000 6 and EN 188101 4. Proposed announcement date Date of latest announcement of this I-ETS (doa): 3 months after ETSI publication Previous page is blank - STD-ETSI PRI-ETS 300 781-ENGL 1777 3i-100855 024323
12、7 90T W Page 7 Final draft prl-ETS 300 781: December 1997 1 Scope This Interim European Telecommunication Standard (I-ETS) applies to balanced fibre branching devices to be used in single mode optical transmission networks. Unbalanced fibre branching devices should satisfy similar mechanical and env
13、ironmental requirements. The scope is to establish minimum uniform requirements for the following 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
14、temperatures. These users should specify branching devices conforming to the basic ETSI performance 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 LETS may be affec
15、ted by measurement uncertainty arising either from measurement or calibration errors. Test methods are in accordance with EN 181000 l unless otherwise specified. A fibre branching device is defined in subclause 3.1 of this I-ETS 2 Normative references This LETS incorporates by dated and undated refe
16、rence, provisions from other publications. 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 b
17、y amendment or revision. For undated references the latest edition of the publication referred to applies. Dl EN 181000 (1 994): “Generic specification: Fibre optic branching devices“. 121 131 41 51 IEC 1300-3-2 (1 995): “Fibre optic interconnecting devices and passive components - Basic test and me
18、asurement procedures - Examinations and measurements - Part 3-2: Polarization dependence of a single-mode fibre optic device“. IEC 1300-2-5 (1 995): “Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Tests - Part 2-5: Torsion/twist “. EN 1881 O1 (1
19、995): “Family Specification: Single-mode dispersion unshifted (B1.l) optical fibre“. ETS 300 019: “Equipment Engineering (EE); Environmental conditions and environmental tests for telecommunications equipment“. Pl EN 188000 (1 992): “Generic specification: Optical fibres“ 71 IEC 68-2-30: “Environmen
20、tal testing - Part 2: Tests. Test Db and guidance: Damp heat, cyclic (12 + 12-hour cycle)“. 3 Defi nit ion For the purposes of this I-ETS, the following definition applies: fibre branching device: A passive optical component which splits the incoming signal (M) to a number of outputs (N). Previous g
21、age is blank 4 Tests Class I II III All tests are to be carried out to validate performance over the optical pass bands 1 260 nm to 1 360 nm and 1480 nm to 1580 nm. This is the minimum requirement for devices corresponding to class I as described in subclause 4.2. Extensions to these windows are cov
22、ered by classes II and III. Class II specifies additional attenuation limits for 1 450 nm to 1 480 nm and 1 580 nm to 1 600 nm. Class III devices shall meet the class li requirements and additionally have defined attenuation limits for 1 600 nm to 1 650 nm. Description Attenuation requirement Abbrev
23、iation 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. Extended wavelength operation over a 150 nm tables 1 and 2 pass band in the 1 550 nm optical window. Extended further in a third window. tables 1, 2
24、and 3 Extended (E) Maintenance (M) A minimum length of fibre or cable of 1,5 m per pori shall be included in all climatic and environmental tests. Unless otherwise specified, the attenuation of the device during a test shall be measured for a single input/output port combination. The attenuation aft
25、er a test shall be remeasured in accordance with subclause 4.2. The values of attenuation given in subclause 4.2 shall be maintained throughout the tests in subclauses 4.7 to 4.21. In addition the return loss requirements of subclause 4.3, the polarization sensitivity requirements of subclause 4.5 a
26、nd the directivity requirements of subclause 4.6 shall be maintained throughout the tests in subclauses 4.7 to 4.21. 4.1 Visual Inspection In accordance with EN 181000 11 subclause 4.5.1. Details: - The device shall be examined for defects using a magnifying glass giving a magnification of between 3
27、 and 8 times. Any markings shall be visible without the use of optical aids. Requirements: - The workmanship of the device shall be satisfactory. In particular the protective case shall have no signs of damage or incorrect assembly. The cable or fibre entry points shall be correctly bonded and there
28、 should be no damage or bending evident in the cable or fibre. - As a minimum, the package shall be marked with the manufacturers identification mark and a serial number which allows the date of manufacture to be determined. 4.2 Attenuation Attenuation requirements for 1 x N and 2 x N devices are de
29、tailed in subclause 4.2.2. Three classes of requirements have been identified. Note that, for example, a device complying with the Class III requirement shall comply with tables 1, 2 and 3 simultaneously: 4.2.1 Detal Is Met hod : Condition: EN 181000 l, subclause 4.5.5. The minimum and maximum atten
30、uation values apply to any combination of input and output port. 4.2.2 Requirements Other numbers of output ports can be specified. STD.ETS1 PRI-ETS 300 781-ENGL 1977 m 3400855 0243220 b2L W M=l 1 M=2 Page 9 Final draft prl-ETS 300 781: December 1997 31 4,lO Table 1: Wavelengths 1 260 nm - 1 360 nm
31、and 1 480 nm - 1 580 nm 5,90 4,OO 6,lO 4 6 8 1 minimum dB 1 maximum dB 1 minimum dB I maximum dB I 540 7,80 5,30 8,lO 6,80 9,50 6,70 9,80 8,lO 11,40 8,OO 11,70 12 I 9,50 13,OO 9,40 I 13,30 16 I 10,80 14,SO 10,70 15,20 24 I 12,oo I 16,60 32 1 13,lO 18,60 11 35 I 17,40 13,lO 1830 N M=l M=2 Attenuation
32、: Attenuation: Attenuation: Attenuation: minimum dB maximum dB minimum dB maximum dB 21 2,60 4,20 2,50 I 4,50 31 4,OO 6,OO Table 3: Wavelength 1 600 nm - 1 650 nm 3,SO 6,20 61 6,40 10,lO 6,30 I 10,40 81 7,60 11,60 730 1130 16 I 10,lO 15,40 10,lO 1570 4.3 Return loss 24 I 11,30 Method: EN 181000 i, s
33、ubclause 4.5.6. 16,70 11,20 18,OO Condition : N All ports not under test shalt be optically terminated to avoid unwanted reflections contributing to the measurement. M=l M=2 Attenuation: Attenuation: Attenuation: Attenuation: minimum dB maximum dB minimum dB maximum dB Requirements: Return loss 2 55
34、 dB 21 2,30 4,510 2,20 4,80 31 3,70 6,30 3,60 6,60 4 6 8 4,70 8,40 4,60 8,70 6,lO 10,40 6,OO 10,70 7.10 12.30 7.00 12.60 16 I 9,50 I 16,20 9,40 I 1 6,50 24 I 10,so 17,25 10,80 18,45 STD.ETSI PRI-ETS 300 78L-ENGL 1997 3400855 02Li3221 5bfl 9 Page 10 Final draft pri-ETS 300 781: December 1997 4.4 Spec
35、tral dependence of attenuation The test wavelength requirement for attenuation measurements is that at least three test wavelengths shall be used within each operating window. Modelling to produce a spectral fit and confidence limit from discrete wavelength measurements is under study. 4.5 Polarizat
36、ion sensitivity Method: IEC 1300-3-2 2, method A (all polarization states). Condition: The allowable sensitivity applies to every combination of input and output port, Requirements: Maximum allowable loss variation of 0,20 dB for N I4 and 0,50 dB for N 4. 4.6 Directivlty Directivity is also know as
37、isolation or crosstalk. It is a measure of the attenuation between two ports which are intended to be isolated. Method: EN 181000 l, subclause 4.5.5 (attenuation). Condition: The directivity between input ports shall be measured for devices with two input ports. For all devices the directivity betwe
38、en each of the output ports shall be measured. All ports not under test shall be optically terminated to avoid unwanted reflections contributing to the measurement. Requirements: Directivity 2 55 dB 4.7 Vibration Met hod : EN 181000 l, subclause 4.6.1. Details: frequency range: 10 HZ - 55 Hz; displa
39、cement: 0,75 mm; number of axes: three orthogonal; endurance duration per axis: number of cycles (1 0-55-1 O): 0,50 hours; 15. Requirements: The attenuation shall be within the following limits of the initial value: +0,30 dB where N S 4; 5 f 0,5 N for coated fibre. 5 N/s for reinforced cable; 0.5 N/
40、s for coated fibre. 120 s for reinforced cable; 60 s for coated fibre. STD-ETSI PRI-ETS 300 78L-ENGL 1777 3400855 0243222 4T4 Page 11 Final draft prl-ETS 300 781: December 1997 The attenuation shall be within the following limits of the initial value: Requirements: 10,30 dB where N 5 4; +0,50 dB whe
41、re N 4. During the test, the attenuation value shall be measured at least once while the peak load is applied 4.9 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: 15 N at a spe
42、ed 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); point of application of the tensile load: 0,2 m from the end of the device; duration of the test: rotation: 1180“. 25 cycles (not to exceed the cable specification); Requ
43、irements: 4.10 Drop Method : Details: Req uirem en ts: The attenuation shall be within the following limits of the initial value: 10,30 dB where N I 4; +OSO dB where N 4. EN 181000 l, subclause 4.6.14. number of drops: 5; drop height: 1,5 metres. The attenuation shall be within the following limits
44、of the initial value: +0,30 dB where N 54; +O50 dB where N 4. 4.11 Fibre nutation This test is intended for use with devices terminated with reinforced cable. Method: EN 181000 l, subclause 4.6.35. Details: number of cycles: 1 o; tensile force: 10 N. Requirements: The attenuation shall be within the
45、 following limits of the initial value: 10,30 dB where N 14; 10.50 dB where N 4. - STD-ETSI PRI-ETS 300 W-ENGL mw m 31655 0243223 330 = Page 12 Final draft prl-ETC 300 781 : December 1997 4.12 Cold Method: EN 181000 l, subclause 4.6.17. Detai Is: temperature: -25C; duration of exposure: 16 hours: pr
46、econditioning procedure: recovery procedure: standard atmospheric conditions for 2 hours; allow specimen to return to 20C in period not exceeding 2 hours. Requirements: During the test, the attenuation limits of subclause 4.2 shall be met. During and on completion of the test, the attenuation shall
47、be within the following limits of the initial value: 10,30 dB where N 14; 10,510 dB where N 4. During the test, the attenuation value shall be measured at a maximum interval of 1 hour. 4.13 Dry heat Method: EN 181000 l, subclause 4.6.18. Details: temperature: +70C; duration of exposure: 96 hours; pr
48、econditioning 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. Requirements: During the test, the attenuation limits of subclause 4.2 shall be met. During and on completion
49、of the test, the attenuation shall be within the following limits of the initial value: 10,30 dB where N 14; +0,50 dB where N 4. During the test, the attenuation value shall be measured at a maximum interval of 1 hour during the first 16 hours and thereafter at a maximum interval of 24 hours until completion of the test. 4.14 Damp heat (steady state) i Method: EN 181000 l, subclause 4.6.19. Details: temperature: relative humidity: exposure
