1、I 3400855 0333776 322 ETS 300 672 September 1996 Source: ETSI TC-TM Reference: DE/TM-O1034 ICs: 33.1 80.30 Key words: Transmission, optical, amplification Transmission and Multiplexing (TM); Relevant generic characteristics of optical amplifier devices and sub-systems ETSI European Telecommunication
2、s 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, ssecretariat - Internet: secretariatQetsi.fr Tel.: +33 92 94 42 O0 - Fax: +33 93 65 47 16 Copyrig
3、ht 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 Telecornmunications Standards Institute 1996. All rights reserved. ETSI ETS*300*672 96 E 3400855 O333777 269 E Page 2 ETS
4、 300 672: September 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 comments concerning its accuracy, please write to “ETSI Editing and Committee Support Dept.“ at the address shown on th
5、e title page. ETSI ETS*300*672 96 E 3400855 0333778 3T5 Page 3 ETS 300 672: September 1996 Contents Foreword . 5 1 Scope 7 2 Normative references 7 3 Abbreviations . 8 4 Definitions of relevant Darameters 8 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 4.14 4.1 5 4.16 4.17 4.1 8 4.1 9 4.2
6、0 4.21 4.22 4.23 4.24 4.25 4.26 4.27 4.28 4.29 4.30 4.31 4.32 4.33 4.34 4.35 4.36 4.37 4.38 4.39 4.40 4.41 4.42 4.43 4.44 4.45 Small-signal gain 9 Reverse small-signal gain 9 Maximum small-signal gain . :.9 Maximum small-signal gain wavelength 9 Maximum small-signal gain variation with temperature .
7、 9 (Small-signal gain) wavelength bandwidth . 9 Small-signal gain wavelength variation 9 Small-signal gain stability . 9 Large-signal output stability . 9 Polarisation-Dependent Gain (PDG) 9 Saturation output power (gain compression power) 10 Nominal output signal power 10 Noise Figure (NF) 10 Forwa
8、rd amplified spontaneous emission (ASE) power level 10 Reverse ASE power level 10 Input Optical Return Loss (ORL) . 10 Output ORL 10 Maximum ORL tolerable at input . 10 Maximum ORL tolerable at output . 10 Pump leakage to output . 10 Pump leakage to input . 10 Out-of-band insertion loss ) . 10 Out-o
9、f-band reverse insertion loss 11 Maximum power consumption . 11 Maximum total output power 11 Operating temperature . 11 Optical connections 11 Input power range 11 Output power range . 11 Polarization Hole Burning (PHB) 11 Polarization Mode Dispersion (PMD) . 11 Power wavelength band . 11 Available
10、 signal wavelength band 11 Tuneable wavelength range . 11 Output signal-to-noise ratio 11 Signal linewidth 11 Gain ripple 12 Gain dynamics . 12 Gain . 12 Noise factor (F) 12 Signai-spontaneous noise figure 12 (Equivalent) spontaneous-spontaneous optical bandwidth (Bsp-sp) . 12 Amplified Spontaneous
11、Emission (ASE) bandwidth 12 In-band insertion loss . 12 Maximum reflectance tolerable at input and output . 12 5 Test methods 13 ETSI ETS*300*672 96 W 3400855 0333779 0331 Page 4 ETS 300 672: September 1996 6 OA classification . 13 6.1 OA devices 13 6.2 OA sub-systems 13 7 Specification parameters 1
12、4 Characteristics of Booster (power) Amplifiers (BAS) . 14 Characteristics of Line Amplifiers (LAS) 14 Characteristics of Optically Amplified Transmitters (OATS) 14 Characteristics of Optically Amplified Receivers (OARS) 14 7.1 7.2 7.3 7.4 7.5 Characteristics of Pre-Amplifiers (PAS) . 14 Annex A (in
13、formative): Bibliography . 15 History . 16 ETSI ETS*300*b72 96 3400855 0333780 853 Page 5 ETS 300 672: September 1996 Foreword This European Telecommunication Standard (ETS) has been produced by the Transmission and Multiplexing (TM) Technical Committee of the European Telecommunications Standards I
14、nstitute (ETSI). Transposition dates Date of adoption of this ETS: Date of latest announcement of this ETS (doa): Date of latest publication of new National Standard or endorsement of this ETS (dop/e): Date of withdrawal of any conflicting National Standard (dow): 16 August 1996 31 December 1996 30
15、June 1997 30 June 1997 ETSI ETS*300*672 96 3400855 0333783 T W Page 6 ETS 300 672: September 1996 Blank page ETSI ETS*300*672 96 I 3400855 0333782 626 I Page 7 ETS 300 672: September 1996 1 Scope This European Telecommunication Standard (ETS) applies to Optical Amplifier (OA) devices and sub- system
16、s to be used in transmission networks. It covers both Optical Fibre Amplifiers (OFAs) and Semiconductor Optical Amplifiers (SOAS). The object of this ETS is to specify those generic characteristics relevant for the use of OA devices (as power amplifiers, pre-amplifiers or line amplifiers) and OA sub
17、-systems (as optically amplified transmitters or optically amplified receivers), primarily for applications in digital transmission. NOTE 1: As far as OFAs are concerned, the present ETS has been prepared from experience with Erbium-doped, silica-based fibre amplifiers, operating in the 1 550 nm wav
18、elength region. Future OFAs, based on different active fibres and possibly operating in different wavelength regions, are not intended to be excluded from this ETS and may lead to additional specifications, as well as to modifications of the existing ones. NOTE 2: The OFA aspects of the present ETS
19、are mainly based on ITU-T Recommendations G.661 2 and G.662 3. 2 Nor mat ive references This ETS incorporates by dated and undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For
20、dated references, subsequent amendments to or revisions of any of these publications apply to this ETS only when incorporated in by amendment or revision. For undated references the latest edition of the publication referred to applies. PI i41 ETS 300 232 (1 993): “Transmission and Multiplexing (TM)
21、; Optical interfaces for equipments and systems relating to the Synchronous Digital Hierarchy ITU-T Recommendation G.957 (1 993) modified“. ITU-T Recommendation G.661 (1993): “Definition and test methods for the relevant generic parameters of optical fibre amplifiers“. ITU-T Recommendation G.662 (1
22、995): “Generic characteristics of optical fibre amplifier devices and sub-systems“. IEC Publication 1290 series (1 996): “Basic Specification for optical fibre amplifier test methods“. ETSI ETS*300*672 96 E 3400855 0333783 562 Page 8 ETS 300 672: September 1996 3 Abbreviations For the purpose of thi
23、s ETS, the following abbreviations apply: ASE BA F LA NF OA OAM OAR OAT OFA ORL PA PDG PDH PMD Rx SDH SOA Tx Amplified Spontaneous Emission Booster (power) Amplifier noise Factor Line Amplifier Noise Figure Optical Amplifier Operation Administration and Maintenance Optically Amplified Receiver Optic
24、ally Amplified Transmitter Optical Fibre Amplifier Optical Return Loss Pre-Amplifier Polarization-Dependent Gain Plesiochronous Digital Hierarchy Polarization Mode Dispersion (optical) Receiver Synchronous Digital Hierarchy Semiconductor Optical Amplifier (optical) Transmitter 4 Definitions of relev
25、ant parameters The definitions of the relevant generic parameters concerning the OA aspects of both OA devices and sub-systems are given in this clause. The definitions of most of the relevant parameters of Optically Amplified Transmitters (OATS) and Optically Amplified Receivers (OARS) are shared w
26、ith those of conventional transmitters and receivers, and are given in ETS 300 232 i. NOTE 1: NO NO E 2: E 3: NOTE 4: NOTE 5: NOTE 6: Further definitions may be needed in the future according to the evolution of OA applications, e.g. in the fields of analogue and multiwavelength transmission. Hereaf
27、ter two different operating conditions will usually be referred to: nominal operating conditions, for a normal use of the OA, and limit operating conditions, in which all the adjustable parameters (e.g. temperature, gain, pump laser injection current for OFAs, or pump current for SOAS, etc.) are at
28、their maximum values, according to the stated absolute maximum ratings. All gains are intended as the dB ratio of the output signal over the input signal in a fibre pigtail. If connectors are used then the signals are measured in fibre pigtails joined to connectors which are connected to the OA port
29、s. The input and output optical power levels refer to the signal only and discriminate against pump or spontaneous emission radiation. Except where noted, the optical powers mentioned in the following are intended as average powers. The specification for a particular OA of the parameters defined in
30、the following, will generally require provision of certain appropriate operating conditions such as temperature, bias current, pump power, etc. The OA amplifies signals in a nominal operating wavelength region. In addition, other out of band signals of the operating wavelength could in some applicat
31、ions also cross the device. The purpose of these out-of-band signals and their wavelength or wavelength region can be specified explicitly case by case. For the OFAs described in the present Standard the operating wavelength is in the i 550 nm region. Page 9 ETS 300 672: September 1996 The definitio
32、ns of most of the relevant parameters for OA devices and sub-systems are given in ITU-T Recommendations G.661 2 and G.662 3. For these parameters the definition is not provided explicitly, but the corresponding sub-clauses of those Recommendations are quoted in the following, taking into account tha
33、t the words “Optical Fibre Amplifier(s) OFA(s)“ should be replaced by “Optical Amplifier(c) OA(s)“. ETSI ETS*300*672 96 I 3400855 0333784 4T9 4.1 Small-signal gain For OA devices only. The gain of the amplifier, when operated in linear regime, where it is quite independent of the input signal optica
34、l power, at given signal wavelength and pump optical power level for OFAs, or pump current for SOAS. NOTE: This property can be described as a discrete wavelength or as a function of wavelength. 4.2 Reverse small-signal gain For OA devices only. As in ITU-T Recommendation G.661 2, subclause 1.2. 4.3
35、 Maximum small-signal gain For OA devices only. As in ITU-T Recommendation G.661 2, subclause 1.3. 4.4 Maximum small-signal gain wavelength For OA devices only. As in ITU-T Recommendation G.661 2, subclause 1.4. 4.5 Maximum small-signal gain variation with temperature For OA devices only. As in ITU-
36、T Recommendation G.661 121, subclause 1.5. 4.6 (Small-signal gain) wavelength bandwidth For OA devices only. As in ITU-T Recommendation G.661 2, subclause 1.6. 4.7 Small-signal gain wavelength variation For OA devices only. As in ITU-T Recommendation G.661 2, subclause 1.7. 4.8 Small-signal gain sta
37、bility For OA devices only. As in ITU-T Recommendation G.661 2, subclause 1.8. 4.9 Large-signal output stability Not for OARS. As in ITU-T Recommendation G.661 2, subclause 1.9. 4.10 Polarisation-Dependent Gain (PDG) For OA devices only. The maximum variation of gain due to a variation of the state
38、of polarisation of the input signal at nominal operating conditions. NOTE: A source of PDG in OFAs is the polarization dependent loss of the passive components used inside. ETSI ETS*300*672 96 I 3400855 0333785 335 W Page 10 FTS 300 672: September 1996 4.1 1 Saturation output power (gain compression
39、 power) Not for OARs. The optical output signal power above which the gain is reduced by 3 dB for OFAs, or 1 dB for SOAs, with respect to the small-signal gain at the signal wavelength. NOTE 1: The wavelength at which the parameter is specified should be stated. NOTE 2: The optical pump power for OF
40、As, or the pump current for SOAs, should be stated where applicable. 4.12 Nominal output signal power Not for OARs. As in ITU-T Recommendation G.661 2, subclause 1.12. 4.13 Noise Figure (NF) For OA devices only. As in ITU-T Recommendation G.661 2, subclause 1.13. 4.1 4 Forward amplified spontaneous
41、emission (ASE) power level Not for OARs. Recommendation G.661 2, subclause 1.14. 4.15 Reverse ASE power level Not for OATs. As in ITU-T Recommendation G.661 2, subclause 1.15. 4.16 Not for OATs. As in ITU-T Recommendation G.661 2, subclause 1.16. 4.17 Output ORL Not for OARs. As in ITU-T Recommendat
42、ion G.661 2, subclause 1.17. Input Optical Return Loss (ORL) 4.18 Not for OARs. As in ITU-T Recommendation G.661 2, subclause 1.18. Maximum ORL tolerable at input 4.19 Not for OARs. As in ITU-T Recommendation G.661 2, subclause 1.1 9. Maximum ORL tolerable at output 4.20 Pump leakage to output For O
43、FAs only and not for OARs. The pump optical power which is emitted from the OFA output port. NOTE: The measurement is performed with a given input signal optical power. 4.21 Pump leakage to input For OFAs only and not for OATs. The pump optical power which is emitted from the OFA input port. NOTE: T
44、he measurement is performed with a given input signal optical power. 4.22 Out-of-band insertion loss For OA devices only. As in ITU-T Recommendation G.661 2, subclause 1.22. These parameters are strongly wavelength dependent in SOAs. ETSI ETS*300*672 96 111 3400855 0133786 271 Page 11 ETS 300 672: S
45、eptember 1996 4.23 Out-of-band reverse insertion loss For OA devices only. As in ITU-T Recommendation G.661 2, subclause 1.23. 4.24 Maximum power consumption As in ITU-T Recommendation G.661 2, subclause 1.24. 4.25 Maximum total output power Not for OARS. As in ITU-T Recommendation G.661 2, subclaus
46、e 1.25. 4.26 Operating temperature As in ITU-T Recommendation G.661 2, subclause 1.26. 4.27 Optical connections As in ITU-T Recommendation G.661 2, subclause 1.27. 4.28 Input power range For OA devices only. As in ITU-T Recommendation G.661 2, subclause 1.28. 4.29 Output power range For OA devices o
47、nly. As in ITU-T Recommendation G.661 2, subclause 1.29. 4.30 Polarization Hole Burning (PHB) Under study. 4.31 Polarization Mode Dispersion (PMD) For OA devices only. As in ITU-T Recommendation G.661 2, subclause 1.31. 4.32 Power wavelength band For power amplifiers only. As in ITU-T Recommendation
48、 G.662 3, subclause 3.1. 4.33 Available signal wavelength band For pre-amplifiers with optical filter($ only. As in ITU-T Recommendation G.662 3, subclause 3.2. 4.34 Tuneable wavelength range For pre-amplifiers and OARS with tuneable optical filter(s) only. As in ITU-T Recommendation 6662 3, subclau
49、se 3.3. 4.35 Output signal-to-noise ratio For OATs only. As in ITU-T Recommendation G.662 3, subclause 3.4. 4.36 Signal linewidth For OATs only. As in ITU-T Recommendation G.662 3, subclause 3.5. ETSI ETS*300*672 9b = 3400855 0333787 108 Page 12 ETS 300 672: September 1996 4.37 Gain ripple For OA devices only. The peak to peak variation of the small-signal gain over a given wavelength range, with sub-nanometre resolution in wavelength. NOTE: This parameter is usually relevant for SOAs only. 4.38 Gain dynamics The ch
