1、BSI Standards PublicationCalibration of tuneable laser sourcesBS EN 62522:2014National forewordThis British Standard is the UK implementation of EN 62522:2014. It is identical to IEC 62522:2014.The UK participation in its preparation was entrusted to TechnicalCommittee GEL/86, Fibre optics.A list of
2、 organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions ofa contract. Users are responsible for its correct application. The British Standards Institution 2014.Published by BSI Standards Limited
3、 2014ISBN 978 0 580 76014 3ICS 31.260; 33.180.01Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 August 2014.Amendments/corrigenda issued since publicationDate T
4、ext affectedBRITISH STANDARDBS EN 62522:2014EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 62522 July 2014 ICS 31.260; 33.180.01 English Version Calibration of tuneable laser sources (IEC 62522:2014) talonnage des sources laser accordables (CEI 62522:2014) Kalibrierung von abstimmbaren Laserqu
5、ellen (IEC 62522:2014) This European Standard was approved by CENELEC on 2014-03-21. CENELEC members are bound to comply 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 lis
6、ts and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management 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 u
7、nder the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark,
8、Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Commit
9、tee for Electrotechnical 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 CENEL
10、EC Members. Ref. No. EN 62522:2014 E BS EN 62522:2014EN 62522:2014 - 2 - Foreword The text of document 86/443/CDV, future edition 1 of IEC 62522, prepared by IEC TC 86 “Fibre optics“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 62522:2014. The following dates are fixe
11、d: latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2014-10-18 latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2017-03-21 Attention is drawn to the p
12、ossibility that some of the elements of this document may be the subject of patent rights. CENELEC and/or CEN shall not be held responsible for identifying any or all such patent rights. Endorsement notice The text of the International Standard IEC 62522:2014 was approved by CENELEC as a European St
13、andard without any modification. In the official version, for Bibliography, the following notes have to be added for the standards indicated: IEC 60027-3 NOTE Harmonised as EN 60027-3. IEC 60359 NOTE Harmonised as EN 60359. IEC 60793-1 (Series) NOTE Harmonised in EN 60793-1 (Series) IEC 60793-2 (Ser
14、ies) NOTE Harmonised in EN 60793-2 (Series) IEC 61280-1-3:2010 NOTE Harmonised as EN 61280-1-3:2010. IEC 61300-3-2 NOTE Harmonised as EN 61300-3-2 IEC 61315 NOTE Harmonised as EN 61315 BS EN 62522:2014- 3 - EN 62522:2014 Annex ZA (normative) Normative references to international publications with th
15、eir corresponding European publications 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 (in
16、cluding any amendments) applies. NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here: www.cenelec.eu P
17、ublication Year Title EN/HD Year IEC 60793-2-50 - Optical fibres - Part 2-50: Product specifications - Sectional specification for class B single-mode fibres EN 60793-2-50 - IEC 60825-1 - Safety of laser products - Part 1: Equipment classification and requirements EN 60825-1 - IEC 60825-2 - Safety o
18、f laser products - Part 2: Safety of optical fibre communication systems (OFCS) EN 60825-2 - IEC 62129-2 - Calibration of wavelength/optical frequency measurement instruments - Part 2: Michelson interferometer single wavelength meters EN 62129-2 - ISO/IEC 17025 - General requirements for the compete
19、nce of testing and calibration laboratories EN ISO/IEC 17025 - ISO/IEC Guide 98-3 2008 Uncertainty of measurement - Part 3: Guide to the expression of uncertainty in measurement (GUM:1995) - - ISO/IEC Guide 99 2007 International vocabulary of metrology - Basic and general concepts and associated ter
20、ms (VIM) - - BS EN 62522:2014 2 IEC 62522:2014 IEC 2014 CONTENTS INTRODUCTION . 6 1 Scope 7 2 Normative references . 7 3 Terms, definitions and abbreviations 7 3.1 Terms and definitions 7 3.2 Abbreviations 10 4 Preparation for calibration 10 4.1 Organization 10 4.2 Traceability . 10 4.3 Preparation
21、. 10 4.4 Reference calibration conditions 11 5 Wavelength calibration . 11 5.1 Overview . 11 5.2 Wavelength calibration at reference conditions 11 5.2.1 Set-up 11 5.2.2 Calibration equipment 11 5.2.3 Procedure for wavelength calibration 12 5.2.4 Dependence on conditions . 12 5.2.5 Uncertainty at ref
22、erence conditions 14 5.3 Wavelength calibration at operating conditions 15 5.3.1 General . 15 5.3.2 Optical power dependence . 15 5.3.3 Uncertainty at operating conditions . 16 6 Optical power calibration 16 6.1 Overview . 16 6.2 Optical power calibration at reference conditions . 17 6.2.1 Set-up 17
23、 6.2.2 Calibration equipment 17 6.2.3 Procedure for power calibration at reference conditions 17 6.2.4 Dependence on conditions . 18 6.2.5 Uncertainty at reference conditions 21 6.3 Optical power calibration at operating conditions . 22 6.3.1 General . 22 6.3.2 Wavelength dependence 22 6.3.3 Uncerta
24、inty at operating conditions . 23 7 Documentation . 23 7.1 Calibration data and uncertainty 23 7.2 Calibration conditions 23 Annex A (normative) Mathematical basis 25 A.1 General . 25 A.2 Type A evaluation of uncertainty 25 A.3 Type B evaluation of uncertainty 26 A.4 Determining the combined standar
25、d uncertainty . 26 A.5 Reporting 27 Annex B (informative) Averaged wavelength (or power) deviation over a certain range 28 BS EN 62522:2014IEC 62522:2014 IEC 2014 3 Annex C (informative) Other testing 30 C.1 General . 30 C.2 Wavelength resolution . 30 C.2.1 Set-up 30 C.2.2 Testing equipment . 30 C.2
26、.3 Testing procedure for determining wavelength resolution 30 C.3 Optical power resolution 31 C.3.1 Set-up 31 C.3.2 Testing equipment . 31 C.3.3 Testing procedure for optical power resolution 31 C.4 Signal to source spontaneous emission ratio . 32 C.4.1 Set-up 32 C.4.2 Testing equipment . 32 C.4.3 T
27、esting procedure for determining signal to source spontaneous emission ratio 32 C.5 Side mode suppression ratio . 33 C.5.1 General . 33 C.5.2 Set-up 33 C.5.3 Testing equipment . 34 C.5.4 Testing procedure 34 Bibliography 37 Figure 1 Measurement set-up for wavelength calibration . 11 Figure 2 Measure
28、ment set-up for temperature dependence . 13 Figure 3 Measurement set-up for wavelength stability . 14 Figure 4 Measurement set-up for optical power dependence . 15 Figure 5 Measurement set-up for intrinsic optical power calibration . 17 Figure 6 Measurement set-up for temperature dependence . 18 Fig
29、ure 7 Measurement set-up for optical power stability 20 Figure 8 Measurement set-up for connection repeatability/reproducibility 21 Figure 9 Measurement set-up for wavelength dependence 22 Figure C.1 Measurement set-up for wavelength resolution 30 Figure C.2 Measurement set-up for optical power reso
30、lution setting test . 31 Figure C.3 Measurement set-up for signal to total source spontaneous emission ratio 32 Figure C.4 Measurement of the signal to spontaneous emission ratio 33 Figure C.5 Measurement set-up for the side mode suppression ratio test 33 Figure C.6 Optical spectrum of tuneable lase
31、r source . 35 Figure C.7 Measurement set-up for SMSR 35 BS EN 62522:2014 6 IEC 62522:2014 IEC 2014 INTRODUCTION Wavelength-division multiplexing (WDM) transmission systems have been deployed in optical trunk lines. ITU-T Recommendations in the G.694 series describe the frequency and wavelength grids
32、 for WDM applications. For example, the frequency grid of G.694.1 supports a variety of channel spacing ranging from 12,5 GHz to 100 GHz and wider. WDM devices, such as arrayed waveguide grating (AWG), thin film filter or grating based multiplexers (MUX) and demultiplexers (DMUX) with narrow channel
33、 spacing are incorporated in the WDM transmission systems. When measuring the characteristics of such devices, wavelength tuneable laser sources are commonly used and are required to have well-calibrated performances; wavelength uncertainty, wavelength tuning repeatability, wavelength stability and
34、output optical power stability are important parameters. The tuneable laser source (TLS) is generally equipped with the following features: a) the output wavelength is continuously tuneable in a wavelength range starting at 1 260 nm or higher and ending at less than 1 675 nm (the output should excit
35、e only the fundamental LP01 fibre mode); b) an output port for optical fibre connectors. The envelope of the spectrum is a single longitudinal mode with a FWHM of at most 0,1 nm. Any adjacent modes are at least 20 dB lower than the main spectral mode (for example, a distributed feedback laser diode
36、(DFB-LD), external cavity laser, etc.) BS EN 62522:2014IEC 62522:2014 IEC 2014 7 CALIBRATION OF TUNEABLE LASER SOURCES 1 Scope This International Standard provides a stable and reproducible procedure to calibrate the wavelength and power output of a tuneable laser against reference instrumentation s
37、uch as optical power meters and optical wavelength meters (including optical frequency meters) that have been previously traceably calibrated. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. F
38、or dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60793-2-50, Optical fibres Part 2-50: Product specifications Sectional specification for class B single-mode fibres IEC 60825-1, Safety o
39、f laser products Part 1: Equipment classification and requirements IEC 60825-2, Safety of laser products Part 2: Safety of optical fibre communication systems (OFCS) IEC 62129-2, Calibration of wavelength/optical frequency measurement instruments Part 2: Michelson interferometer single wavelength me
40、ters ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories ISO/IEC Guide 98-3:2008, Uncertainty of measurement Part 3: Guide to the expression of uncertainty in measurement (GUM:1995) ISO/IEC Guide 99:2007, International vocabulary of metrology Basic and gene
41、ral concepts and associated terms (VIM) 3 Terms, definitions and abbreviations For the purposes of this document, the following terms, definitions and abbreviations apply. 3.1 Terms and definitions 3.1.1 accredited calibration laboratory calibration laboratory authorized by an appropriate national o
42、rganization to issue calibration certificates that demonstrates traceability to national standards 3.1.2 adjustment set of operations carried out on an instrument in order that it provides given indications corresponding to given values of the measurand BS EN 62522:2014 8 IEC 62522:2014 IEC 2014 SOU
43、RCE: IEC 60050-300:2001, 311-03-16, modified minor editorial change, omission of the NOTE See also ISO/IEC Guide 99:2007, 3.11, modified 3 NOTES omitted. 3.1.3 calibration set of operations that establish, under specified conditions, the relationship between the values of quantities indicated by a m
44、easuring instrument and the corresponding values realized by standards Note 1 to entry: The results of a calibration permit either the assignment of measurand values to the indications or the determination of corrections with respect to the indications. Note 2 to entry: A calibration may also determ
45、ine other metrological properties such as the effects of influence quantities. Note 3 to entry: The result of a calibration may be recorded in a document, called a calibration certificate or a calibration report. SOURCE: ISO/IEC Guide 99:2007, 2.39, modified shortened; the two NOTES replaced by 3 ne
46、w NOTES. 3.1.4 calibration conditions conditions of measurement in which the calibration is performed 3.1.5 calibration at reference conditions calibration which includes the evaluation of the uncertainty at reference conditions of the light source under calibration 3.1.6 calibration at operating co
47、nditions calibration which includes the evaluation of the uncertainty at operating conditions of the light source under calibration 3.1.7 level of confidence estimated probability that the true value of a measured parameter lies in the given range 3.1.8 coverage factor k used to calculate the expand
48、ed uncertainty U from the standard uncertainty, u 3.1.9 decibels dB, dBm sub-multiple of the Bel, B, unit used to express values of optical power on a logarithmic scale Note 1 to entry: The power level is always relative to a reference power P0=010/log100PPLPPwhere P and P0are expressed in the same
49、linear units. The unit symbol dBm is used to indicate power level relative to 1 mW: BS EN 62522:2014IEC 62522:2014 IEC 2014 9 =mW1log1010mW1/PLPThe linear ratio, Rlin, of two radiant powers, P1and P2, can alternatively be expressed as an power level difference in decibels (dB): )(log10)(log10log10)(log102101102110lin10PPPPRLP= Similarly, relative uncertainties, Ulin, or relative deviations, can be alternatively expressed in deci
