1、 ETSI TS 101 791 V1.3.1 (2004-07)Technical Specification Transmission and Multiplexing (TM);Dense wavelength division multiplexing devices;Common requirements and conformance testingETSI ETSI TS 101 791 V1.3.1 (2004-07) 2 Reference RTS/TM-01112 Keywords optical, transmission, WDM ETSI 650 Route des
2、Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Important notice Individual copies of the present document can be downloaded from:
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4、e printing on ETSI printers of the PDF version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at
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6、ropean Telecommunications Standards Institute 2004. All rights reserved. DECTTM, PLUGTESTSTM and UMTSTM are Trade Marks of ETSI registered for the benefit of its Members. TIPHONTMand the TIPHON logo are Trade Marks currently being registered by ETSI for the benefit of its Members. 3GPPTM is a Trade
7、Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. ETSI ETSI TS 101 791 V1.3.1 (2004-07) 3 Contents Intellectual Property Rights4 Foreword.4 1 Scope 5 2 References 5 3 Definitions and abbreviations.6 3.1 Definitions6 3.2 Abbreviations .6 4 Tests .6 4.1 Vi
8、sual Inspection: In accordance with IEC 61300-3-1.6 4.2 Optical tests 7 4.2.1 Operating wavelength and general test conditions7 4.2.2 Attenuation .7 4.2.3 1 dB -bandwidth .7 4.2.4 Cumulative inter-channel isolation.8 4.2.5 Uniformity 8 4.2.6 Return loss 9 4.2.7 Bi-directional near-end crosstalk (NEX
9、T) attenuation (directivity) .9 4.2.8 Polarization dependent loss (PDL) .9 4.3 Environmental tests 10 4.3.1 Cold 10 4.3.2 Dry heat 10 4.3.3 Damp heat (steady state).10 4.3.4 Change of temperature11 4.4 Mechanical test without continuous monitoring.11 4.4.1 Fibre/Cable retention 11 4.5 Mechanical tes
10、ts with continuous monitoring 12 4.5.1 Vibration.12 4.5.2 Shock 12 5 Acceptance criteria.13 5.1 Basic optical requirements .13 5.2 Other optical and environmental requirements.13 5.3 Pass/fail criteria 13 Annex A (informative): Bibliography.14 History 15 ETSI ETSI TS 101 791 V1.3.1 (2004-07) 4 Intel
11、lectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found in ETSI SR 000 314: “Intellectual Property Righ
12、ts (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (http:/webapp.etsi.org/IPR/home.asp). Pursuant to the ETSI IPR Policy, no investigation, including IP
13、R searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This Technical Specification (TS) has been
14、produced by ETSI Technical Committee Transmission and Multiplexing (TM). The present document is a revision of ES 201 791 V1.2.1. ETSI ETSI TS 101 791 V1.3.1 (2004-07) 5 1 Scope The present document applies to pigtailed fibre optic Dense-Wavelength Division Multiplexer (D-WDM) devices to be used in
15、single mode optical transmission networks for signals at a maximum bit rate of 10 Gbit/s, in weather protected, temperature controlled environments corresponding to EN 300 019-1-3 3, class 3.1. The scope is to establish minimum uniform requirements for the following aspects: optical, environmental a
16、nd mechanical properties; test conditions; acceptance criteria. Some users may have additional specific requirements such as a need to verify performance at lower temperatures. These users should specify D-WDM devices conforming to the basic ETSI performance standard plus additional tests or more se
17、vere test conditions. Acceptance criteria will be interpreted with respect to the consideration that some of the parameters specified in the present document may be affected by measurement uncertainty arising either from measurement or calibration errors. Test methods are in accordance with IEC 6130
18、0 2 series unless otherwise specified. A fibre optic D-WDM device is defined in clause 3 of the present document. NOTE: For connectorized devices the requirements of ES 200 671 5 should be considered in addition to the present document. In case of conflicting requirements shall the requirements stat
19、ed in the present document be taken. 2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present document. References are either specific (identified by date of publication and/or edition number or version number) or non-specifi
20、c. For a specific reference, subsequent revisions do not apply. For a non-specific reference, the latest version applies. Referenced documents which are not found to be publicly available in the expected location might be found at http:/docbox.etsi.org/Reference. 1 IEC/PAS 62074-1: “Fibre optic WDM
21、devices - Part 1: Generic specification“. 2 IEC 61300 (all relevant parts): “Fibre optic interconnecting devices and passive components - Basic test and measurement procedures“. 3 ETSI EN 300 019-1-3: “Environmental Engineering (EE); Environmental conditions and environmental tests for telecommunica
22、tions equipment; Part 1-3: Classification of environmental conditions; Stationary use at weatherprotected locations“. 4 ITU-T Recommendation G.692: “ Optical interfaces for multichannel systems with optical amplifiers“. 5 ETSI ES 200 671: “Transmission and Multiplexing (TM); Passive optical componen
23、ts; Optical fibre connectors for single mode optical fibre communication systems; Common requirements and conformance testing“. 6 ITU-T Recommendation G.694.1: “Spectral grids for WDM applications: DWDM frequency grid“. ETSI ETSI TS 101 791 V1.3.1 (2004-07) 6 7 IEC/PAS 61300-3-29: “Fibre optic inter
24、connecting devices and passive components - Basic test and measurement procedures - Part 3-29: Examinations and measurements - Measurement techniques for characterizing the amplitude of the spectral transfer function of DWDM components“. 3 Definitions and abbreviations 3.1 Definitions For the purpos
25、es of the present document, the following terms and definition applies: Dense-Wavelength Division Multiplexer (D-WDM): passive optical component which separates (and/or combines) two or more signal at different wavelength from one (two) or more inputs into two (one) or more outputs NOTE: “Dense“ ref
26、ers to a class of components operating with channel spacing equal or less than 800 GHz. All the parameter definitions shall be in accordance with IEC 62074-1 1. 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: DWDM Dense Wavelength Division Multiplexer N
27、EXT Near-End CrossTalk OWR Operation Wavelength Range PDL Polarization Dependent Loss TLS Tuneable Laser Source 4 Tests All measurements shall be carried out at normal room conditions, unless otherwise stated. If the device is provided with an active temperature control, this shall be set at the set
28、point specified by the manufacturer. The requirements apply to every combination of input and output port. A minimum length of fibre or cable of 1,5 m per port shall be included in all climatic and environmental tests. 4.1 Visual Inspection: In accordance with IEC 61300-3-1 Details: The device shall
29、 be examined for defects using a magnifying glass giving a magnification of between 3 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 inco
30、rrect assembly. The cable or fibre entry points shall be correctly bonded and there 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 deter
31、mined. ETSI ETSI TS 101 791 V1.3.1 (2004-07) 7 4.2 Optical tests 4.2.1 Operating wavelength and general test conditions Requirements: All the operating wavelengths shall be in accordance with ITU Recommendation G.694.1 6. The operation wavelength range (OWR) of every DWDM channel is defined by its n
32、ominal wavelength, the optical signal spectral width at the highest specified bit rate, and the maximum acceptable wavelength deviation of the system lasers (e.g. according to ITU-Recommendation G.962 4). Test source stability: 2m length shall be used. Detector linearity: Within 0,05 dB over the dyn
33、amic range to be measured. All unused DWDM ports shall be non reflective optically terminated. 4.2.2 Attenuation Method: IEC 61300-3-29 PAS 7. Condition: Attenuation shall be determined as the worst case over all states of polarization. Details: The measurement set-up is according to IEC 61300-3-29
34、7 figures 2 or 3. The tracking filter in figure 2 can be omitted for this application. The polarization dependent insertion loss of the DWDM is measured according to IEC 61300-3-29 7 in the operation wavelength range (OWR) of every channel. The wavelength resolution shall be better than 2 % of the c
35、hannel spacing, which in most cases requires the Method A (tuneable laser with wavelength monitoring, polarization controller and optical power meter). The wavelength steps shall be chosen smaller than 1 % of the channel spacing. For the attenuation measurement the worst case insertion loss values a
36、re noted for each channel. Requirements: Maximum allowable attenuation: - Grade S: (n 0,5 + 0,8) dB; - Grade P: (n 0,5 + 0,5) dB, where n is the total number of output ports or the total number of input ports, whichever is greater. 4.2.3 1 dB -bandwidth Method: IEC 61300-3-29 7. Condition: The 1 dB
37、-bandwidth shall be determined as the worst case over all the states of polarization. Details: The test set-up is the same as for attenuation. The polarization dependent insertion loss of the selected DWDM channel is measured according to IEC 61300-3-29 7 and the peak of the spectral response inside
38、 the OWR of the selected channel is determined. Looking up and down from the peak wavelength, the wavelengths + and - are determined, where the filter transfer function drops below - 1 dB for the first time (7 clause 4.3.3). The wavelength resolution shall be 50 dB suppression of side-modes and spon
39、taneous emission, the tracking filter shall be used. Test wavelengths: OWRs of all channels. The wavelength step width shall be 8 16 2,0 dB 16 2,5 dB ETSI ETSI TS 101 791 V1.3.1 (2004-07) 9 4.2.6 Return loss Method: IEC 61300-3-29 7. Condition: The return loss shall be determined as the worst case o
40、ver all states of polarization. Details: The measurement set-up, calibration and evaluation is according to IEC 61300-3-29 7, appendix A, figure A1. If a directional coupler is used, it shall be a 50/50 coupler with 55 dB directivity. Every DWDM port is tested at the OWRs of all channels; the wavele
41、ngth resolution and the minimum step width are the same as for attenuation measurement. Requirements: Minimum allowable return loss: - Grade 1 35dB. 4.2.7 Bi-directional near-end crosstalk (NEXT) attenuation (directivity) Method: IEC 61300-3-20 2; IEC 61300-3-29 7. Condition: These measurements are
42、applicable to bi-directional DWDMs only. The wavelengths used for the transmit direction are all different from the receive wavelengths. The bi-directional NEXT attenuation shall be determined as the worst case over all states of polarization. Details: The test set-up is according to 7, figure 2. Th
43、e optical signal from the TLS and the polarization controller is fed to one transmit ports of the DWDM and for every receive port the polarization dependent attenuation is measured with detector D1. The input power to the transmit port is monitored by detector D2. The TLS shall provide at least 40 d
44、B SSR, otherwise a tracking filter should be added. The measurement is performed in the OWR of the chosen transmit port. This procedure is repeated for all transmit ports successively. All ports not under test shall be optically terminated to avoid unwanted reflections to contribute to the measureme
45、nt. The bi-directional NEXT attenuation is the level difference observed with the detectors D1 and D2. Requirements: Minimum allowable bi-directional NEXT attenuation: - 50 dB. 4.2.8 Polarization dependent loss (PDL) Method: IEC 61300-3-12 2. Condition: The PDL shall be determined over the OWR of ev
46、ery channel. Details: The same as for “Attenuation“, using the Mueller Matrix Method. For every channel the attenuation is measured in the passband as a function of the polarization state and the difference between the worst case and the best case attenuations for every wavelength is determined. The
47、 PDL is the maximum difference found this way. Requirements: Maximum allowable PDL: - Grade S: 0,2 dB; - Grade P: 0,3 dB. ETSI ETSI TS 101 791 V1.3.1 (2004-07) 104.3 Environmental tests The following requirements and details apply for all the tests: Requirements: Attenuation: The test limits of clau
48、se 4.2.2 shall be met. Return loss: The test limits of clause 4.2.6 shall be met. 4.3.1 Cold Method: IEC 61300-2-17 2. Details: temperature: -10C. duration of exposure: 96 hours. preconditioning procedure: standard atmospheric conditions for 2 hours. recovery procedure: allow specimen to return to 2
49、0C in period not exceeding 2 hours.measurements required: before and after test 4.3.2 Dry heat Method: IEC 61300-2-18 2. Details: temperature: +60 2C. duration of exposure: 96 hours. preconditioning procedure: standard atmospheric conditions for 2 hours. recovery procedure: allow specimen to return to 20C in period not exceeding 2 hours.measurements required: before and after test 4.3.3 Damp heat (steady state) Method: IEC 61300-2-19 2. Details: temperature: 40C. relative humidity: 93 % 2 %.
