EN 61290-3-3-2014 en Optical amplifiers - Test methods - Part 3-3 Noise figure parameters - Signal power to total ASE power ratio.pdf

1、BSI Standards PublicationOptical amplifiers Test methodsPart 3-3: Noise figure parameters Signal power to total ASE power ratioBS EN 61290-3-3:2014National forewordThis British Standard is the UK implementation of EN 61290-3-3:2014. It isidentical to IEC 61290-3-3:2013.The UK participation in its pr

2、eparation was entrusted by TechnicalCommittee GEL/86, Fibre optics, to Subcommittee GEL/86/3, Fibre optic systems and active devices.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisi

3、ons ofa contract. Users are responsible for its correct application. The British Standards Institution 2014.Published by BSI Standards Limited 2014ISBN 978 0 580 78335 7ICS 33.180.30Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published un

4、der the authority of theStandards Policy and Strategy Committee on 28 February 2014.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 61290-3-3:2014EUROPEAN STANDARD EN 61290-3-3 NORME EUROPENNE EUROPISCHE NORM February 2014 CENELEC European Committee for Electrot

5、echnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B - 1000 Brussels 2014 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

6、Ref. No. EN 61290-3-3:2014 E ICS 33.180.30 English version Optical amplifiers - Test methods - Part 3-3: Noise figure parameters - Signal power to total ASE power ratio (IEC 61290-3-3:2013) Amplificateurs optiques - Mthodes dessais - Partie 3-3: Paramtres du facteur de bruit - Rapport puissance du s

7、ignal sur puissance totale dESA (CEI 61290-3-3:2013) Lichtwellenleiter-Verstrker Prfverfahren - Teil 3-3: Rauschzahlparameter - Verhltnis der Signalleistung zur Gesamt-ASE-Leistung (IEC 61290-3-3:2013) This European Standard was approved by CENELEC on 2013-12-12. CENELEC members are bound to comply

8、with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Ma

9、nagement Centre or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has t

10、he same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvi

11、a, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 61290-3-3:2014EN 61290-3-3:2014 - 2 - Foreword The text of document 86C/1121/CDV, future edition 1 of IEC 61290-3-3, prepared by S

12、C 86C, “Fibre optic systems and active devices“, of IEC/TC 86, “Fibre optics“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 61290-3-3:2014. The following dates are fixed: latest date by which the document has to be implemented at national level by publication of an ide

13、ntical national standard or by endorsement (dop) 2014-09-12 latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2016-12-12 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC an

14、d/or CEN shall not be held responsible for identifying any or all such patent rights. Endorsement notice The text of the International Standard IEC 61290-3-3:2013 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following notes h

15、ave to be added for the standards indicated: IEC 61290-3-1 NOTE Harmonized as EN 61290-3-1. IEC 61290-3-2 NOTE Harmonized as EN 61290-3-2. BS EN 61290-3-3:2014- 3 - EN 61290-3-3:2014 Annex ZA (normative) Normative references to international publications with their corresponding European publication

16、s The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE

17、When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 61290-3 - Optical amplifiers - Test methods - Part 3: Noise figure parameters EN 61290-3 - IEC 61291-1 2012 Optical amplifiers - Part 1:

18、Generic specification EN 61291-1 2012 BS EN 61290-3-3:2014 2 61290-3-3 IEC:2013 CONTENTS 1 Scope and object . 5 2 Normative references . 5 3 Terms, definitions and abbreviations 5 3.1 Terms and definitions . 5 3.2 Abbreviations . 6 4 Background . 7 5 Apparatus 8 5.1 Measurement using an OSA . 8 5.2

19、Measurement using a bandpass filter and an optical power meter . 9 6 Test sample . 11 7 Procedure 11 7.1 General 11 7.2 Measurement using an OSA . 11 7.2.1 Calibration 11 7.2.2 Measurement 12 7.3 Measurement using a bandpass filter and an optical power meter . 13 7.3.1 General. 13 7.3.2 Calibration

20、13 7.3.3 Measurement 13 8 Calculations . 14 9 Test results 14 Annex A (informative) Signal power to total ASE power ratio Dependence on signal input power, wavelength and output power. 15 Bibliography 17 Figure 1 Test set-up for OSA calibration and for measuring signal input power and source spontan

21、eous emission power . 8 Figure 2 Test set-up for measuring signal output power and ASE power using an OSA 8 Figure 3 Test set-ups for filter calibration and measuring the signal input power 10 Figure 4 Test set-ups for measuring output signal power and ASE power using a filter and an optical power m

22、eter . 10 Figure A.1 The dependence of Sig_ASE on signal input power . 15 Figure A.2 The ASE spectrum for two different signal wavelengths . 16 Figure A.3 Sig_ASE as a function of output power for different signal wavelength . 16 BS EN 61290-3-3:201461290-3-3 IEC:2013 5 OPTICAL AMPLIFIERS TEST METHO

23、DS Part 3-3: Noise figure parameters Signal power to total ASE power ratio 1 Scope and object This part of IEC 61290-3 applies to all commercially available single channel optical amplifiers (OAs), including OAs using optically pumped fibres (OFAs) based on either rare-earth doped fibres or on the R

24、aman effect, semiconductor optical amplifier modules (SOA modules) and planar optical waveguide amplifiers (POWAs). More specifically, it applies to single channel OAs placed before optical receivers, where there are no optical bandpass filtering elements placed between the OA and the receiver. The

25、object of this part of IEC 61290-3 is to establish uniform requirements for accurate and reliable measurement of the ratio of the signal output power to the total ASE power generated by the OA in the optical bandwidth of the receiver. This quantity is a measure of the spontaneous-spontaneous beat no

26、ise at the receiver, and is correlated to the spontaneous-spontaneous noise factor of the OA, Fsp-sp, as defined in IEC 61290-3 and IEC 61291-1. IEC 61290-3-1 describes a measurement method, using an optical spectrum analyzer, OSA, for the signal-spontaneous noise factorpssigF but does not describe

27、a method for measuring Fsp-sp. IEC 61290-3-2 describes a measurement method, using an electrical spectrum analyzer (ESA), for the total noise factor Fsp-sp+ Fsig-sp. However, this method does not allow Fsp-spto be measured separately, and therefore does not provide a means of directly quantifying th

28、e effect of spontaneous-spontaneous beat noise at the receiver. This part of IEC 61290-3 complements IEC 61290-3-1 and IEC 61290-3-2 in that it provides such a means. Two measurement methods are provided for the ratio of the signal output power to the total ASE power. The first method uses an OSA, w

29、hile the second method uses a bandpass filter and an optical power meter. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated refe

30、rences, the latest edition of the referenced document (including any amendments) applies. IEC 61290-3, Optical amplifiers Test methods Part 3: Noise figure parameters IEC 61291-1:2012, Optical fibre amplifiers Part 1: Generic specification 3 Terms, definitions and abbreviations 3.1 Terms and definit

31、ions For the purposes of this document, the following terms and definitions apply. BS EN 61290-3-3:2014 6 61290-3-3 IEC:2013 3.1.1 signal input power Pinpower of the optical signal at the input to the OA 3.1.2 signal output power Poutpower of the optical signal at the output of the OA 3.1.3 signal w

32、avelength swavelength of the signal optical carrier SOURCE: IEC 61291-1:2012, definition 3.2.2.1.1 3.1.4 signal gain G gain of the OA at the signal wavelength, defined as the ratio of the output signal power to the input signal power 3.1.5 amplified spontaneous emission band ASE band BASEwavelength

33、band that contains at least 99 % of the total ASE power generated by OA 3.1.6 ASE centre wavelength Ccentre wavelength of the ASE band 3.1.7 ASE power PASEASE power generated by the OA within the ASE band 3.1.8 signal to total ASE power ratio Sig_ASE ratio of the output signal power to the total ASE

34、 power within BASE3.1.9 spontaneousspontaneous noise factor Fsp-spratio of the electrical SNR due to spontaneous-spontaneous beat noise at the OA output to the electrical SNR due to shot noise at the OA input Note 1 to entry: See also IEC 61290-3 for a detailed formula for of Fsp-sp. 3.2 Abbreviatio

35、ns APD avalanche photo diode AFF ASE flattening filter ASE amplified spontaneous emission BS EN 61290-3-3:201461290-3-3 IEC:2013 7 CD chromatic dispersion DFB distributed feedback EDFA erbium-doped fibre amplifier ESA electrical spectrum analyzer FWHM full width half maximum NF noise figure OA optic

36、al amplifier OFA optical fibre amplifier OSA optical spectrum analyzer PDG polarization dependent gain PMD polarization mode dispersion POWA planar optical waveguide amplifier RBW resolution band width SNR signal to noise ratio SOA semiconductor optical amplifier VOA variable optical attenuator WDM

37、wavelength division multiplexing 4 Background In recent years, high-speed transmission links beyond 10 Gb/s have been commercially introduced. These links (as well as some high-end 10-Gb/s links, such as submarine links) require high sensitivity receivers, e.g. avalanche photo diode (APD) receivers,

38、 which operate in a limited input optical power dynamic range. In addition, specialized optical components such as chromatic dispersion (CD) compensators and polarization mode dispersion (PMD) compensators may be placed on the receiver module, thus introducing considerable optical insertion loss. In

39、 multi-channel wavelength division multiplexed (WDM) links a multi-channel OA is often placed at the end of the link before the WDM signal is demultiplexed into individual channels. The total output power of the multi-channel OA is typically such that the optical power per channel is in the range of

40、 0 dBm to 5 dBm. This power is then attenuated by the demultiplexer, and further attenuated by the specialized optical components mentioned above. Thus, the optical power reaching the receiver may be below the required input optical power dynamic range. In this case, a single channel OA may be place

41、d on the receiver module to boost the optical power reaching the receiver. In such a situation, there is typically no optical bandpass filter between the single channel OA and the receiver, so that all the amplified spontaneous emission (ASE) noise generated by the amplifier reaches the receiver. Th

42、is can result in a significant level of spontaneous-spontaneous beat noise at the receiver. One way to characterize this noise is through the spontaneous-spontaneous noise factor, Fsp-sp, as defined in IEC 61290-3 and IEC 61291-1. Another way to characterize the spontaneous-spontaneous beat noise is

43、 through the signal to total ASE power ratio, Sig_ASE, at the OA output, given by the following: ASEout_PPASESig = (1) where Poutis the signal output power of the OA, and PASEis the ASE power generated by the OA within the ASE band, given by BS EN 61290-3-3:2014 8 61290-3-3 IEC:2013 ( ) dPB=ASEASEAS

44、E (2) where BASEis the ASE band of the OA defined as a wavelength band that contains at least 99 % of the total ASE power generated by OA. Care should be taken to define BASEsuch that it excludes other sources of noise not related to ASE. In particular, BASEshould exclude possible pump leakage power

45、 exiting the OA output port. For example, for a C-band EDFA pumped by a 1 480 nm pump, BASEshould not include wavelengths below 1 500 nm. This guarantees that BASEincludes at least 99 % of the ASE generated within the EDFA on the one hand, while excluding possible 1 480 nm pump leakage power on the

46、other. NOTE 1 In many OAs, and especially in OFAs, the ASE is polarization independent. In some OAs, such as some types of SOA modules, the ASE may be polarization dependent. PASErefers to the total power in both polarization directions. While there is no direct relation between Sig_ASE and Fsp-sp,

47、it is clear that there is a correlation between them, and that both quantities can be used to quantify the effect of spontaneous-spontaneous beat noise at the receiver. The higher is Sig_ASE, the lower is the spontaneous-spontaneous beat noise (and the lower Fsp-sp), and vice-versa. In this standard

48、, a measurement method for Sig_ASE is presented. Annex A provides a brief technical discussion of the various OA parameters that can affect and determine the Sig_ASE value. NOTE 2 All quantities in this standard are in linear units, unless specifically defined otherwise. 5 Apparatus 5.1 Measurement

49、using an OSA This subclause describes the apparatus used for measuring Sig_ASE using an OSA. Figure 1 shows the test set-up used for OSA calibration, as well as for measuring the signal input power and the source spontaneous emission power. Figure 2 shows the test set-up used to measure the signal output power and the ASE power. Figure 1 Test set-up for OSA calibration and for measuring signal input power and source spontaneous emission power Figure 2 Test set-up for measuring sig